The site news http://www.thecementgrindingoffice.com/ http://www.thecementgrindingoffice.com/cvs.html Mon, 23 Jul 2018 10:40:50 GMT The new version of GK software version 7 is now available.<br>GK includes 100 calculators.<br><br>Version in French will be available soon. http://www.thecementgrindingoffice.com/ballsampling.html Sun, 20 May 2018 09:17:56 GMT The procedure has been totally modified and also the calculator. http://www.thecementgrindingoffice.com/mining/gemstoneweight.html Mon, 29 Jan 2018 12:28:31 GMT This small calculator allows to get a rough idea of the weight of a gemstone in carats http://www.thecementgrindingoffice.com/blaine.html Sat, 13 May 2017 09:57:50 GMT Revision of the presentation.<br>Now in three parts with practicle examples. http://www.thecementgrindingoffice.com/grindingaids1.html Tue, 16 Aug 2016 16:05:12 GMT A presentation + an economic evaluation are available http://www.thecementgrindingoffice.com/circuitcostlist.html Tue, 16 Aug 2016 16:04:22 GMT A presentation and a calculator are available http://www.thecementgrindingoffice.com/falseair1.html Tue, 28 Jun 2016 13:00:56 GMT - For raw and coal mills<br>- For cement mills<br>A calculator is also available<br><br>Thank you to follow us and Enjoy! http://www.thecementgrindingoffice.com/cvs.html Tue, 28 Jun 2016 09:53:36 GMT The version N°6 is now available with 87 calculators.<br><br>Thank you to follow us and Enjoy! http://www.thecementgrindingoffice.com/fans1.html Thu, 19 May 2016 17:34:33 GMT I am happy to announce you a new technical presentation about fans and especially centrifugal fans very used in the cement grinding area:<br>- Introduction<br>- Definition<br>- Classification of fans<br>- Types of centrifugal fans<br>- Main components of centrifugal fans<br>- Fans characteristic curves<br>- Definition of the parameters<br>- Fan laws<br>- Control of the fans<br>- Choice of a fan<br>- Links in relation<br>This study is now on line with an affinity laws fans calculator.<br><br>Thank you to follow us and Enjoy! http:// Tue, 26 Apr 2016 12:50:20 GMT - Separators sizing elements calculator has been modified.<br>- The same for the presentation regarding the separators.<br>Also modified:<br>- Grindability tests<br>- Hardness tests<br>- Comminution<br>- Laws of comminution<br>- Ball sampling<br>- Marked ball test<br>- Material inside the mill<br>- Mill residence time<br><br>Thank you and Enjoy! http:// Wed, 02 Mar 2016 09:57:15 GMT A presentation called "cement manufacturing parameters formulas" and its calculator are available online.<br><br>http://www.thecementgrindingoffice.com/cementparameters.html<br><br>The presentation regarding the particle size distribution representation has been completely modified and is linked with a small calculator.<br><br>http://www.thecementgrindingoffice.com/particlesizedistribution.html<br><br>Thank you to follow us and Enjoy!<br><br> http://www.thecementgrindingoffice.com/topsize.html Mon, 22 Feb 2016 21:55:17 GMT - The top size grinding media by Bond, Rowland and Azzaroni (Presentation + Calculators)<br>- First chamber ball charge (equilibrated 2 cases)<br><br>Thank you to follow us and Enjoy! http://www.thecementgrindingoffice.com/sieving-explanation.html Tue, 09 Feb 2016 16:27:47 GMT - For fresh feed (clinker, gypsum, limestone...)<br>- For mill axial tests<br>A calculator is also available<br><br>- Also, mill inspection: modification of the presentation<br><br>Thank you and Enjoy! http://www.thecementgrindingoffice.com/volumeload.html Tue, 02 Feb 2016 12:12:59 GMT - Calculateurs des taux de remplissage divisés en neuf parties<br>- Calculateur de la puissance de Bond divisé en trois parties<br>- Calculateur de puissance d'Hogg et Fuerstenau divisé en trois parties<br>Enjoy! http://www.thecementgrindingoffice.com/cvs.html Wed, 06 Jan 2016 08:55:14 GMT Version 5.1.1 - updated 30/12/2015<br>- The software is available in English or French<br>- Versions are with or without macros<br>- Versions for Excel 32 bits and Excel 64 bits<br>- A free download with a 10-day trial is at disposition<br>- Files to download are available for Excel 2007 and later versions<br>Thank you to follow us and Enjoy! http://www.thecementgrindingoffice.com/presentations/ICR%20Marc%20Piccinin%20article.pdf Wed, 11 Nov 2015 16:38:18 GMT Issued in October of 2015 on the International Cement review on the paper review http://www.thecementgrindingoffice.com/cemtech.html Tue, 03 Nov 2015 07:59:39 GMT Two new presentations avalaible:<br><br>- Blaine vs residues<br>- Lagrange corrector explanation http://www.thecementgrindingoffice.com/cc1.html Tue, 29 Sep 2015 14:30:19 GMT Clinker, gypsum, limestone, filler, pozzolana, slag, fly ash and kiln dust...<br>Their influence on grinding process.<br>New presentation available on line.<br>Also in French version.<br>Enjoy! http://www.thecementgrindingoffice.com/bmgt.html Sat, 12 Sep 2015 18:12:17 GMT We have the pleasure to announce you that the Ball Mills Grinding Technology workbook is now available.<br>The french version is also online. http://www.thecementgrindingoffice.com/vibratingscreen.html Tue, 14 Jul 2015 09:25:08 GMT Today, we have the pleasure to announce you that a new presentation dedicated to vibrating screens is available online.<br>A small calculator is also at disposal for those who wish to have an idea of the required screening area.<br>Thank you to follow us and Enjoy!<br> http://www.thecementgrindingoffice.com/grindingcircuitsizingcomplete.html Mon, 15 Jun 2015 10:50:41 GMT Finally, the complete grinding circuit calculator is available online.<br>This calculator is very long.<br>Many tests were carried out before putting it online, but it may remain some bug due to the conversion of MS Excel in interactive HTML page.<br>We apologize in advance.<br>This calculator will be constantly in evolution.<br>Enjoy! http://www.thecementgrindingoffice.com/beltconveyor.html Wed, 03 Jun 2015 10:30:45 GMT A new presentation about belt elevators in a cement grinding plant is available online.<br>The calculator "belt sizing" has also been modified in order to be more complete.<br>Thank you to follow us and Enjoy! http://www.thecementgrindingoffice.com/elevator.html Tue, 12 May 2015 09:51:27 GMT A new presentation is available in english and french on the website:<br><br>1. Introduction<br>2. Types of bucket elevators<br>3. Main components of the bucket separator<br>4. Sizing elements<br><br>Thank you and Enjoy! http://www.thecementgrindingoffice.com/ Thu, 30 Apr 2015 06:51:36 GMT I have the pleasure to announce you that The Cement Grinding Office website has been changed completely.<br>Now, it presents a modern look and we hope it will be more pleasant to navigate through the numerous pages which constitute the site.<br>Thank you for following us and Enjoy! http://www.thecementgrindingoffice.com/grindingcircuit.html Tue, 31 Mar 2015 08:55:35 GMT Today, the topic on the grinding circuit sizing is completed with a general overview, as well as presentations on air slides and screw conveyors.<br>The "endless screw" calculator has also been modified.<br>The suite will follow soon!<br>Thank you to follow us and enjoy! http://www.thecementgrindingoffice.com/grindingcircuitsizing.html Tue, 17 Mar 2015 09:45:47 GMT New calculators have been published on the site.<br>They are part of a set named "Grinding Plants Sizing".<br>Today, the following calculators are available:<br>- Bucket elevator Sizing<br>- Airslide Sizing<br>- Screw Conveyor Sizing<br>- Rotary Valve Sizing<br>- Belt conveyor Sizing (available tonight)<br>- Roller Press Design Elements (available tonight)<br>Presentations about these equipments are still in preparation.<br>Lastly, the full calculator on the sizing of a grinding circuit is currently in the testing phase.<br>I remember that all these presentations and calculators are available in french.<br>In addition, other subjects and calculators will be processed as soon:<br>- Costs of grinding plants<br>- Vibrating screens<br>- Cement Components<br>- grinding Aids<br>Thank you for supporting our site by proposing us grinding circuits audits and by buying our grinding software.<br> http://www.thecementgrindingoffice.com/cvs.html Mon, 09 Feb 2015 10:16:29 GMT The site's home page has just had an extensive modification.<br>Furthermore, a new version of GK grinding software is available.<br>It now contains 59 calculators.<br>Finally, we recall that this grinding software is the basis for practical training and courses on ball mills.<br>Thank you and Enjoy! http://www.thecementgrindingoffice.com/rp1.html Mon, 02 Feb 2015 10:18:14 GMT Today, the second part of the pre-grinding systems presentation: Roller-Press.<br>The text is subdivided into the following chapters:<br>1. Introduction<br>2. Operating principle<br>3. Explanation of the grinding action<br>4. General representation<br>5. Methods of use and types of circuits<br>6. Problem of the feed<br>7. Problem of the roller pressure<br>8. Operating parameters<br>9. Wear problems of the rollers<br>10. Particle size results of the press<br>11. Elements of sizing considerations<br>12. Main dimensions of the roller press<br>13. Determine the increase of production<br>14. Comparison of the situations before / after modification<br>15. Modification of the ball mill<br>16. Advantages of the roller press<br>17. Disadvantages of the roller press<br>18. Conclusion<br>A small calculator will follow.<br>Thank you and Enjoy! http://www.thecementgrindingoffice.com/pregrindingsystems.html Tue, 20 Jan 2015 08:48:54 GMT I have the pleasure to announce you a new presentation in my website: Pre-grinding systems.<br>Today, the first part concerning Vertical Shaft Impactors (VSI) is online.<br>Very soon, the second part (Roller Presses) will be available.<br>Thank you and Enjoy! http://www.thecementgrindingoffice.com/optimcalc.html Mon, 05 Jan 2015 09:13:17 GMT To begin this new year, I am pleased to share with you a little calculator in Excel.<br>It's called "Optimization of energy costs of grinding plants."<br>It is free to download in both English and French versions.<br>And again, I wish you a happy new year 2015! http://www.thecementgrindingoffice.com/millcontrolsystems.html Mon, 22 Dec 2014 08:20:03 GMT A new presentation is available on the website.<br>It is entitled: Control systems of grinding circuits.<br>The main types of regulation are described: ON-OFF, PID, fuzzy logic and expert systems.<br><br>I wish you a good read as well as happy holidays season. http://www.thecementgrindingoffice.com/bag1.html Wed, 26 Nov 2014 11:38:21 GMT As promised last week, the second part of this presentation, about baghouse filters, is available.<br>There are also 2 calculators (reverse air and pulse jet filters).<br>Other subject, the recalculation of samples results by the Lagrange multiplicator is also online after revision.<br>http://www.thecementgrindingoffice.com/lagrangecim.html<br>As usual, these papers and calculators are in English and French.<br>Enjoy! http://www.thecementgrindingoffice.com/filters.html Mon, 17 Nov 2014 08:53:43 GMT I am pleased to share with you a new presentation: Filters in grinding plants.<br>We will discuss electrostatic precipitators and bag filters.<br>Calculators giving dimensioning elements are also online.<br>Today, the first part: electrostatic precipitators.<br>Enjoy your reading! http://www.thecementgrindingoffice.com/fr/massbalance.html Tue, 11 Nov 2014 19:38:58 GMT I am pleased to share with you a new presentation and calculators based on the mass balance in a grinding circuit.<br>In addition to the presentation, 6 calculators are available in English and French.<br>Thank you for your interest and Enjoy! http://www.thecementgrindingoffice.com/fr/moscow.html Tue, 11 Nov 2014 19:38:30 GMT A new presentation is available.<br>This is in fact the precise retranscription of a conference held in Moscow in November 2013.<br>The document presents a list of solutions to improve the efficiency of a cement grinding plant and quantify these improvements.<br>This presentation is entitled "Different ways to get an efficient grinding plant."<br>Enjoy!<br> http://www.thecementgrindingoffice.com/fr Tue, 08 Jul 2014 17:05:50 GMT Today, we have the pleasure to publish a french version of The Cement Grinding Office website.<br>Other pages are also being edited and will be available shortly.<br>Enjoy!<br><br>Aujourd’hui, j’ai le plaisir de vous annoncer que la version française du site The Cement Grinding Office est disponible.<br>Quelques pages sont encore en cours de reformulation.<br>Certains liens comme les exemples, infographies et tests sont restés en anglais.<br>Merci.<br><br>Marc Piccinin<br> http://www.thecementgrindingoffice.com/volumeloadexplanation.html Sat, 07 Jun 2014 12:23:26 GMT Calculators of the measurements of the filling degrees have been modified.<br>Central part measurement method changed.<br>Enjoy! http://www.thecementgrindingoffice.com Tue, 03 Jun 2014 08:59:39 GMT Bientôt, le site sera disponible en français<br><br>Soon, the site will be available in French http://www.thecementgrindingoffice.com/ Thu, 27 Mar 2014 10:15:27 GMT The "Cement Grinding Office" website has just undergone its first major lifting since its introduction two years ago.<br>A Mining part (coming from The Mining Grinding Office website) has been integrated.<br>We have also the pleasure to present you our services:<br>- Grinding Circuit and Mill's Audits<br>- Ball Mill Circuits Optimizations<br>- Training Courses<br>We hope you will enjoy these modifications.<br>Thank you very much.<br>Marc Piccinin<br> http://www.thecementgrindingoffice.com/typesofballmills.html Mon, 17 Mar 2014 10:39:15 GMT This presentation briefly describes the different types of mills in wet and dry processes.<br>Enjoy! http://www.thecementgrindingoffice.com/lawsofcomminution.html Tue, 04 Mar 2014 16:09:56 GMT A short definition of the Comminution and the presentation of the three Laws of Comminution.<br>Enjoy! http://www.thecementgrindingoffice.com/ballsampling.html Tue, 14 Jan 2014 15:24:57 GMT This paper explains how to carry out a ball charge sampling inside a cement mill and how to perform a marked-ball test.<br>A Marked Ball Test Calculator is also available with two tables to fill during the test, with results.<br>Enjoy!<br> http://expocem.ru/index.php?option=com_content&view=article&id=6&Itemid=9&lang=en Tue, 19 Nov 2013 08:05:09 GMT VI SCIENTIFIC READINGS “A MODERN CEMENT PLANT”<br>26–28 November, 2013, Moscow, Expocentre<br><br>The Cement Grinding Office will participate to this event! http://www.thecementgrindingoffice.com/cvs.html Tue, 12 Nov 2013 17:06:04 GMT A new version (2.0.1) of these programs is now available.<br>A total of 80 calculators and presentations can be found in the Grinding Kit Software.<br>These softwares are in the Shopping Area:<br>http://www.thecementgrindingoffice.com/cvs.html<br>Enjoy! http://www.thecementgrindingoffice.com/simultromp.html Wed, 23 Oct 2013 14:44:43 GMT This calculator simulates the behaviour of a dynamic separator for a cement of more or less 3000 Blaine until 3800 Blaine. <br>Finer is the cement and higher is the circulating load. <br>Obviously, it's normal. <br>The simulation was performed for the three generations of separators. <br>For a constant separator feed, it gives the fines, tails, circulation factor (ratio feed/fines), the average efficiency, <br>the cut size (D50), the imperfection factor and the by-pass.<br>The graph, as I already mentioned, is very limited in this interactive html page, because logarithmic scales are <br>impossible to do with the converter. <br>I hope to improve this part of the calculator in the future. <br>This simulation will be the last modification of the website before December because The Cement Grinding Office is moving to Italy this week.<br>Enjoy! http://www.thecementgrindingoffice.com/materialretentiontime.html Mon, 14 Oct 2013 16:17:14 GMT This paper explains how to calculate the quantity of material inside a ball mill and how to realize a mill retention test with a tracer.<br>There are also two calculators to know the material quantity inside a monochamber and a 2 chambers mill.<br>These calculators are located in the page of the volume load calculators.<br>Enjoy http://www.thecementgrindingoffice.com/blaine.html Sun, 06 Oct 2013 18:15:19 GMT Cement fineness is expressed either in terms of Particle Size Distribution (PSD) with residues (or passing) on reference sieves or by its specific surface area in Blaine.<br>In this presentation, we will develop the Blaine method which is the most widely used in the world of cement.<br>A calculator is also available.<br>Enjoy! http://www.thecementgrindingoffice.com/ballmillsimulation.html Sun, 29 Sep 2013 15:44:14 GMT A new calculator which simulates the behaviour inside the mill.<br>The User has to enter percentages of passing cumulated of fresh feed, tails, separator feed and fines.<br>An horizontal slider allows to have an idea of the mill's efficiency and the separator feed distribution after the simulation.<br>Depending of the browser, the slider seems to be "hard" to move but it is working.<br>This calculator-simulation is only a prototype.<br>More elaborate versions will be on site in function of our availability.<br>Thank you and Enjoy! http://www.thecementgrindingoffice.com/coalgrinding3.html Wed, 18 Sep 2013 17:19:18 GMT This fourth and final part of the presentation summarizes the drying capacities required for a coal airswept mill with three graphs.<br>An other calculator for determining the drying needs is also available.<br>This update ends the presentation.<br>Enjoy! http://www.thecementgrindingoffice.com/coaldryingbalance.html Tue, 10 Sep 2013 19:55:47 GMT This calculator allows to determine the temperature of gas and the gas flow necessary to dry the coal inside an airswept mill.<br>Mill Heat balance is used (Other methods also exist).<br>As other previous calculators, it is only a good start to evaluate the drying conditions.<br>For dimensioning drying equipments, a deep study of the local conditions must be carry out with specialized engineering offices.<br>Enjoy!<br> http://www.thecementgrindingoffice.com/millbalexplan.html Thu, 05 Sep 2013 16:52:22 GMT This presentation has been updated. http://www.thecementgrindingoffice.com/coalgrindingtechnology.html Tue, 03 Sep 2013 21:32:42 GMT I have the plaisure to share with you a presentation about coal grinding.<br>The paper is divided in 3 parts with the following chapters:<br>1. Introduction<br>2. Types of coals<br>3. Coal properties<br>4. Petcoke<br>5. Reasons for grinding coal<br>6. Ball mills<br>7. Vertical Roller mills (VRM)<br>8. Comparison Ball mills versus Vertical mills for coal grinding<br>9. Drying problems<br>10. Fineness of the dust coal<br>11. Safety considerations<br>12. Dust collectors<br><br>Enjoy! http://www.thecementgrindingoffice.com/wearratecalculator.html Sun, 25 Aug 2013 16:55:50 GMT As promised last sunday, please find 2 wear rate calculators, for monochambers mills and <br>2 chambers mills.<br>Enjoy! http://www.thecementgrindingoffice.com/millsinternals4.html Sun, 18 Aug 2013 17:31:04 GMT The grinding media is a very important factor of the mills internals, not only on a mill's efficiency point of view but also on a wear point of view.<br>The presentation is composed of the following chapters:<br>- Introduction<br>- Composition of the ball charges<br>- Ball charges quality<br>- Wear rate<br>- Wear rate calculation<br>- Cylpebs <br>A wear rate calculator will be available next sunday.<br>Enjoy! http://www.thecementgrindingoffice.com/millsinternals3.html Sun, 11 Aug 2013 13:55:17 GMT Diaphragms are mechanical assemblies made ​​to separate the various compartments of a ball mill.<br>We can divide diaphragms in four groups:<br>- Transfer diaphragms<br>- Intermediate diaphragms<br>- Central discharge diaphragms<br>- Outlet diaphragms<br>See the complete document in thecementgrindingoffice.com<br>Enjoy! http://www.thecementgrindingoffice.com/millsinternals2.html Sun, 04 Aug 2013 16:30:07 GMT Mills Internals paper: Today, the linings of the finishing compartments.<br>Enjoy! http:// Sun, 28 Jul 2013 17:52:58 GMT The internals of a ball mill can be divided in 4 groups:<br>- Head liners<br>- Shell linings<br>- Diaphragms<br>- Grinding media<br>This article will review each group and especially those who have a direct impact on the grinding efficiency.<br>Today, the Feed Head Liners and the 1st Chamber Linings.<br>Enjoy! http://www.thecementgrindingoffice.com/cvs.html Thu, 25 Jul 2013 19:19:45 GMT Prices of these softwares changed. http://www.thecementgrindingoffice.com/rrb.html Fri, 28 Jun 2013 16:52:07 GMT The calculator allows now to know the slope of the particle size distribution and the correlation.<br>The formula used is from the simple linear regression.<br>See explanation on the following pages:<br>Cement area: http://www.thecementgrindingoffice.com/particlesizedistribution.html<br>Mining area: http://www.themininggrindingoffice.com/psdrrbmining.html<br>The modification is for both websites:<br>Cement area: http://www.thecementgrindingoffice.com/rrb.html<br>Mining area: http://www.themininggrindingoffice.com/psd.html<br>Enjoy! http://www.thecementgrindingoffice.com/paybackroiexplanation.html Tue, 18 Jun 2013 11:36:01 GMT After the calculator regarding the mill's internals modification (ROI and payback), please find a calculator concerning the mill circuit modification (pre-grinding system, separator and others).<br>The calculator gives the payback and the Internal Rate of Return of the investment.<br>Don't hesitate to give your comments and suggestions.<br>Enjoy! http://www.thecementgrindingoffice.com/cvs.html Fri, 07 Jun 2013 16:20:45 GMT Files to download are available for Excel 1997-2003 and 2007 and later versions.<br>Enjoy! http://www.thecementgrindingoffice.com/cvs.html Tue, 04 Jun 2013 10:35:27 GMT We are working on 1997-2007 Excel version.<br>Some software in these older versions are already available.<br>Enjoy! http://www.thecementgrindingoffice.com/cvs.html Fri, 31 May 2013 16:09:26 GMT Our Grinding Software are now online.<br>A 10-day trial is available.<br>Excel 2007 or a later version is necessary to run the programs.<br>Enjoy! http://www.thecementgrindingoffice.com/cvs.html Sun, 19 May 2013 16:02:33 GMT Our software is in the finishing phase.<br>Final tests are being conducted to identify possible defects.<br>6 Programs will be available very soon:<br>- Grinding Kit Software<br>- Ball Charges Kit Software<br>- Sizing Kit Software<br>- Power and Volume Load Kit Software<br>- Balance and Drying Kit Software<br>- Tromp RRSB Kit Software<br>You can see the detailed content of these programs in our shopping page.<br>Enjoy! http://www.thecementgrindingoffice.com/chargescomposition2.html Thu, 16 May 2013 13:27:58 GMT The calculator has been modified. http://www.thecementgrindingoffice.com/chargescompositionmono.html Tue, 14 May 2013 20:40:17 GMT A bug has been eliminated http://www.thecementgrindingoffice.com/paybackroiexplanation.html Mon, 06 May 2013 22:18:53 GMT In the industry, the analysis of the profitability of an investment is to determine if an investment will return in relation to capital invested.<br>We propose a calculator to determine the profitability of the modification of the internals of a cement mill (2 chambers).<br>Later, a similar calculator will be available for modification of the circuit (i.e pregrinding system and/or new separator addition).<br>Enjoy! http://www.thecementgrindingoffice.com/makeup.html Mon, 08 Apr 2013 20:17:19 GMT This calculator has been modified. http://www.linkedin.com/groups/Cement-Grinding-Office-4943552?gid=4943552&mostPopular=&trk=tyah Fri, 05 Apr 2013 19:04:51 GMT The Cement Grinding Office is a new group in LinkedIn.<br>It was created for passionate of ball mills.<br>Welcome to discuss and share your experience! http://www.thecementgrindingoffice.com/particlesizedistribution.html Thu, 28 Mar 2013 00:47:36 GMT This paper describes the methods to represent a particle size distribution. 5 methods are presented: Linear, Linear with X- log scale, Log-Normal, Gaudin-Shuhmann and Rosin-Rammler distributions. An example of linear regression is also detailed.<br>Enjoy! http://www.thecementgrindingoffice.com/cementballcharges.html Mon, 11 Mar 2013 15:43:19 GMT As promised, three calculators are now available to define the ball charge distribution for<br>monochamber, 2 chambers and 3 chambers cement mills.<br>Many tests have been realized in order to eliminate errors and bugs.<br>However, due to the spreadsheet converter, unpredictable results are always possible.<br>Please send us a screenshot of the bug if you met one, to the following email address: marcpiccinin@thecementgrindingoffice.com<br>An important point to complete: calculators are a good beginning to study the ball charge and to compare with the existing one.<br>Ball charges given by the calculators should never be put into practice without a deep survey of the installation and with the support of a qualified engineering office.<br>Last and not least, soon a commercial an more complete version of these calculators will be available on the site.<br>See the page: http://www.thecementgrindingoffice.com/shopping.html<br>Enjoy http://www.thecementgrindingoffice.com/modballcharge.html Mon, 18 Feb 2013 20:51:30 GMT This calculator analyses the granulometry of the material inside the mill and proposes a modification of the ball charge in order to improve the mill efficiency.<br>This calculator is a good start to evaluate the grinding ball charge after mill analysis.<br>Results must be confirmed by a specialized engineering office.<br>The Cement Grinding Office accepts no responsibility in case of problems due to the misuse of the calculator.<br> http://www.thecementgrindingoffice.com/ballchargesexplan.html Thu, 07 Feb 2013 14:54:49 GMT On February 8, the site celebrates its first anniversary.<br>To commemorate this date, The Cement Grinding Office offers a new series of calculators to determine the ball charge of cement mills.<br>Today, the site proposes:<br>- A brief presentation about the composition of the ball charges<br>- An infographic explaining how to use the calculator<br>I work very hard in order to develop the calculator, but conversion problems force me to do tests longer than expected in order to eliminate the maximum of bugs.<br>Thank you to follow the site and enjoy!<br> http://www.thecementgrindingoffice.com/cementballcharges.html Mon, 21 Jan 2013 20:24:11 GMT We present you today the well-known Bond formula to get the ball top size.<br>In a few days, the site will celebrate its first anniversary and for the occasion, we will propose a calculator to determine the ball charge for your cement ball mill.<br>Remember! http://www.thecementgrindingoffice.com/millpower.html Tue, 15 Jan 2013 14:29:13 GMT The presentation describes two well-known ball mill power formulas. These formulas are used in the cement industry but also in the mining area:<br>1. the Bond power formula<br>2. the Hogg and Fuerstenau power formula<br>Calculators adapted for the cement mills are also available in the tools page. http://www.thecementgrindingoffice.com/cemcoolingexplan.html Wed, 02 Jan 2013 18:51:19 GMT First new of the year 2013:<br>A paper which explains the possibilities of cooling the cement in the separator. <br>High Efficiency Separators are the best for this purpose. <br>A calculator to get the cement temperature at separator outlet (by the separator heat balance) is also available.<br> http://www.thecementgrindingoffice.com/crossword.html Mon, 24 Dec 2012 18:07:41 GMT A small distraction for this Christmas break.<br>Enjoy! http:// Fri, 21 Dec 2012 11:24:49 GMT A bug has been eliminated and an update performed. http://www.thecementgrindingoffice.com/dryingcapacitiescalculations.html Wed, 19 Dec 2012 21:14:50 GMT A paper to explain the different equipments configurations for drying material like raw meal and a description of the 2 calculators used to know the drying requirements (gas quantity and temperature) in order to insure a good drying in a ball mill.<br>Warning: Calculators are only a good start to evaluate the existing drying conditions.<br>For dimensioning drying equipments, a deep study of the local conditions must be carry out by specialized engineering offices.<br>Enjoy!<br><br>The Cement Grinding Office wishes you a Merry Christmas and a Happy New Year! http://www.thecementgrindingoffice.com/forms.html Mon, 17 Dec 2012 00:38:52 GMT Technical forms have been modified.<br>After having submitted the form, a new page is opened.<br>Please click on "back to the top" and you are invited to send the flowsheet of the installation.<br>If you prefer to fill the form offline, download the file and send it us with the flowsheet to the following address: assistance@thecementgrindingoffice.com.<br>Five forms are available:<br>- Monochamber mill<br>- 2 chmabers mill<br>- 3 chambers mill<br>- Birotator mill<br>- Airswept mill<br>Enjoy! http://www.thecementgrindingoffice.com/power.html Mon, 10 Dec 2012 20:07:50 GMT The 5 calculators have been modified.<br>Power coefficients are now available for special cases: annular (ring) motor, slag, iron ore, alumina cement, thin lining, cylpebs, danula (retaining) rings.<br>Enjoy!<br> http://www.thecementgrindingoffice.com/grindabilitytests.html Sun, 02 Dec 2012 18:41:51 GMT This article is intended to present the main grindability and hardness tests used in the industry.<br>It is obvious that these tests are widely used in the cement industry for several reasons:<br>- Sizing/dimensioning of new installations<br>- Improvement of existing installations.<br>- Research and development<br>Enjoy! http://www.thecementgrindingoffice.com/volumeloadexplanation.html Sun, 25 Nov 2012 13:43:12 GMT Three calculators (monochamber mill, 2 compartments mill and 3 compartments mill) have been completely reformulated.<br>Three procedures are now available: <br>- H measurement method<br>- Number of visible plates method<br>- Central part measurement method<br>An explanation page and an infographic have also been added.<br>Enjoy! http://www.thecementgrindingoffice.com/tromp.html Wed, 21 Nov 2012 14:29:23 GMT The calculator has been completely reformulated due to the difficulty to get some parameters.<br>In fact, the converter doesn't allow the use of Macro instructions and it is necessary to specify<br>trend lines manually to calculate D75, D50 and D25 sizes.<br>An infographic is also available for better understanding.<br>Note that this update is probably not the last one.<br>Enjoy! http://www.thecementgrindingoffice.com/cementmillsizing.html Fri, 16 Nov 2012 13:53:24 GMT After the presentation of the method to size a cement ball mill, here are two calculators for<br>2 chambers and monochamber mills. Also valid for raw material.<br>Warning: These calculators give a rough and initial idea for sizing a cement ball mill.<br>To go ahead, a deeper study is necessary with ball mills suppliers.<br>Please advice us if you encountered bugs or anomalies.<br>Enjoy!<br> http://www.thecementgrindingoffice.com/cemballmillsizingexpl.html Fri, 09 Nov 2012 21:12:14 GMT This paper explains how to size a cement ball mill with the well-known Bond formula. <br>Efficiency correction factors are applied with the Bond equation. <br>The method is valid both for clinker grinding and for raw materials grinding. <br>This method only gives a rough and initial idea for sizing a cement ball mill. <br>To go ahead, a deeper study is necessary with ball mills suppliers or a specialized engineering office. <br>At the end of the explanation, a detailed example is proposed.<br>Two calculators are scheduled to be at your disposal next week after having successfully passed their final tests.<br>Enjoy! http://www.thecementgrindingoffice.com/explaintromptheory.html Fri, 02 Nov 2012 21:51:52 GMT The Tromp curve explanation has been completely reformulated with infographics in order to facilitate the understanding.<br>Graphs and infographics are also helping.<br>Enjoy!<br> http://www.thecementgrindingoffice.com/productionvsblaine.html Tue, 30 Oct 2012 23:10:53 GMT This paper gives formulas which have been developed to predict the new output of a cement or raw mill when the Blaine fineness or the residue of reference is increased or decreased.<br>There is also the calculator linked to this subject.<br>Enjoy! http://www.thecementgrindingoffice.com/sep3gena.html Sun, 14 Oct 2012 16:11:38 GMT Third Generation Separators pages updated: a new separator has been added in the presentation.<br>Enjoy! http://www.thecementgrindingoffice.com/millbalexplan.html Fri, 12 Oct 2012 16:46:16 GMT This presentation explains the importance of the heat balance of a cement ball mill and gives the full calculation methodology in order to get it.<br>Enjoy! http://www.thecementgrindingoffice.com/gen3sepsizing.html Tue, 02 Oct 2012 23:05:49 GMT This small and simple calculator gives a first and good idea of the separator dimensions and air flow in function of the estimated production and circulating load.<br> http://www.thecementgrindingoffice.com/sep3gena.html Tue, 25 Sep 2012 21:17:18 GMT - First generation separators page updated<br>- Second generation separators page updated<br>- Today, the third generation with the following chapters:<br> - Introduction<br> - Advantages of 3rd generation dynamic separators<br> - Disadvantages of 3rd generation dynamic separators<br> - General principle of operation<br> - Principle of operation for each design<br> - Possibilities of adjustments<br> - Possible causes of malfunction<br> - Parameters of dimensioning<br> - Types of circuits<br> - Special designs for raw mill circuits<br> - Types of raw meal circuits<br> - Example of dimensioning<br> - Third generation separators data sheet<br>Enjoy! http://www.thecementgrindingoffice.com/sep2gen.html Sun, 16 Sep 2012 19:24:25 GMT After the separators of the 1rst generation, the separators of the second generation, also called cyclones separators.<br>Enjoy! http://www.thecementgrindingoffice.com/sep1gen.html Mon, 10 Sep 2012 19:01:17 GMT Today, the separators of the first generation, also called Turbo separators.<br>Enjoy! http:// Sun, 09 Sep 2012 16:34:06 GMT Modification of the Home Page http:// Mon, 03 Sep 2012 19:40:43 GMT After the first part of the separators presentation (introduction + cyclones), here is the second part,<br>static separators and V-separators:<br><br>http://www.thecementgrindingoffice.com/static-v.html<br><br>In the following page, a small calculator for sizing cyclones.<br>Use this calculatore as preliminary and rough estimation:<br><br>http://www.thecementgrindingoffice.com/cyclonesizing.html<br><br>The third part of the separators presentation will be available soon.<br>Enjoy! http://www.thecementgrindingoffice.com/sepintro.html Thu, 23 Aug 2012 22:02:07 GMT A complete presentation of the separators in the cement industry with explainations,<br>designs, tips, calculations and examples.<br>- Two families: static and dynamic.<br>- Static: cyclones, static grit and V-separator.<br>- Dynamic: first, second and third generation.<br>Today, the first part with a short introduction and the cyclones.<br>Enjoy! http://www.thecementgrindingoffice.com/lime0.html Fri, 10 Aug 2012 17:03:09 GMT The presentation has been updated. http://www.thecementgrindingoffice.com/millventmeasure.html Thu, 26 Jul 2012 19:37:39 GMT This page explains the procedure to check the ventilation of the ball mill with the Pitot-S tube.<br>Locations, number of points, equations are presented in detail.<br>Don't hesitate to send me your remarks if you think that something must be added.<br>Enjoy!<br><br> http://www.thecementgrindingoffice.com/circuitsampling.html Wed, 18 Jul 2012 14:16:46 GMT This presentation explains the procedure to realize a sampling campaign in the ball mill circuit.<br>It gives also some tips to get representative samples.<br>Enjoy! http://www.thecementgrindingoffice.com/lagrangecim.html Fri, 06 Jul 2012 16:43:05 GMT This calculator extrapolates unreliable results of a sampling campaign in realistic results.<br>It is based on the Lagrangian Method.<br>Warning: More the correlation of the samples is low and more the corrected Tromp curve <br>will be probably far from the reality.<br>If the correlation is lower than 0.9, this Lagrangian method will probably not be representative.<br>An example is shown on the page of the calculator.<br><br><br> http://www.thecementgrindingoffice.com/balancewater.html Tue, 12 Jun 2012 22:13:04 GMT The calculation of the thermical balance of the ball mill is now proposed according 2 methods:<br>- The first method, we know the ventilation of the mill + the cement temperature and we want to calculate the water quantity we need to inject in order to get the temperature at mill outlet we would like to have.<br>- The second method, we know the ventilation inside the mill + the quantity of water injected and we calculate the temperature of the cement at mill outlet. In this calculation, the user needs to re-type the cement temperature found by the calculator in order to find the best correlation.<br>This procedure is necessary because the spreadsheet converter doesn't accept the SOLVER add-on.<br> http://www.thecementgrindingoffice.com/telechargements.html Wed, 30 May 2012 17:12:57 GMT A download center page is now available. http://www.thecementgrindingoffice.com/lime0.html Tue, 29 May 2012 16:19:53 GMT The presentation and the .rar document has been updated. http://www.thecementgrindingoffice.com/lime0.html Tue, 29 May 2012 16:18:38 GMT The study "Grinding technology of limestone with ball mills" is now available in PDF file http://www.thecementgrindingoffice.com/millvent.html Thu, 24 May 2012 22:26:55 GMT The ventilation has 3 objectives:<br>- to insure the cooling of the mill and the material<br>- to dedust the mill<br>- to remove the finest particles from the mill<br>The calculator gives the quantity of air required to vent a cement mill and sizes the fan and its motor<br> http://www.thecementgrindingoffice.com/charges.html Fri, 18 May 2012 18:08:30 GMT This calculator gives the surface and the average weight of a ball charge. There is also a rough estimation of the efficiency of this ball charge.<br>Enjoy! http://www.thecementgrindingoffice.com/granulobroyeur1.html Thu, 10 May 2012 00:00:39 GMT This analysis includes three steps: <br>- The sampling campaign inside the mill <br>- The sieving of the samples in the laboratory <br>- The results analysis with the curve and its interpretation http://www.thecementgrindingoffice.com/ballmillinspection.pdf Wed, 02 May 2012 03:36:38 GMT The document in .pdf format is now available. <br>It will be updated regularly.<br>Enjoy! http:// Wed, 25 Apr 2012 13:37:07 GMT The Mining Grinding Technology Website.<br>Tonight, a new website dedicated to the grinding technology in the field of mining is born.<br>Go to: www.themininggrindingoffice.com http://www.thecementgrindingoffice.com/millinspection.html Tue, 17 Apr 2012 17:40:20 GMT This document is intended to help the staff of the cement plants.<br>It was performed for a 2 compartments cement mill. <br>Enjoy! http://www.themininggrindingoffice.com/unitsconversion.html Fri, 13 Apr 2012 03:19:23 GMT A converter is now available (with the main units used in the grinding area) http://www.thecementgrindingoffice.com/explaintromptheory.html Wed, 11 Apr 2012 13:18:59 GMT The Tromp curve is well known to be an excellent tool to evaluate separators of grinding circuits.<br>In order to help people who have some difficulty to understand the Tromp curve, I prepared a document divided in three parts: theory, practical example and exercice.<br>Hoping it will help! http://www.thecementgrindingoffice.com/explaintromptheory.html Wed, 11 Apr 2012 13:07:06 GMT The presentation of the document has been improved this morning. Enjoy! http://www.thecementgrindingoffice.com/tromp.html Sun, 08 Apr 2012 16:14:56 GMT A bug has been eliminated http://www.thecementgrindingoffice.com/tools.html Thu, 22 Mar 2012 18:42:45 GMT You must use the comma (,) to mark the decimal units position and not the dot (.) http://www.thecementgrindingoffice.com/rrb.html Fri, 16 Mar 2012 02:01:38 GMT A bug has been eliminated in the Rosin-Rammler-Bennett diagram (Particle size distribution). http://www.thecementgrindingoffice.com/volumeload.html Wed, 14 Mar 2012 18:18:14 GMT Three calculators are avalaible to calculate the ball charge volume load (or filling degree). http:// Tue, 13 Mar 2012 19:57:07 GMT Today, the Webmaster included a RSS feed in the site. It will give news from The Cement Grinding Office.<br>Sign up to our RSS feed and you will know the latest updates of the technical tools and the latest stories on grinding technology.