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testwork | Testwork Programs That Deliver Multiple Data Sets Mining projects are applying the age-old notion of "check your work" against comminution circuit design, mill ...[↓ read more ↓] | Alex Doll & Derek Barratt | ||

testwork | Effect of Sample Dimensions on Comminution Testwork Comminution tests on a particular project have displayed completely different breakage characteristics relativ...[↓ read more ↓] | Alex Doll & Derek Barratt | ||

testwork | Comparison of UCS to Bond Work Indices Unconfined Compressive Strength (UCS) is a commonly used rockmass strength measurement used by rock mechanics ...[↓ read more ↓] | Alex Doll, Derek Barratt & Ken Wood | ||

testwork | Effect of core diameter on the Bond impact crushing work index test The Bond low energy impact (crushing) work index test is specified to be performed on rock specimens between 5...[↓ read more ↓] | Alex Doll, Derek Barratt & Bob Phillips | ||

testwork | Testwork template spreadsheet Blank spreadsheet that is pre-populated with the field names needed to import laboratory test results into the...[↓ read more ↓] | Alex Doll | ||

testwork | Calculating DWi from a drop weight test result The drop weight test is a common laboratory measurement used to determine the comminution characteristics of r...[↓ read more ↓] | Alex Doll | ||

testwork | Commentary on the apparatus of the Bond rod mill work index The Bond "Third Theory" of comminution was originally divided into three size classes reflecting the varieties...[↓ read more ↓] | Alex Doll | ||

testwork | Database of public grindability testwork Spreadsheet that accompanies the Procemin 2016 paper by Alex Doll. This spreadsheet contains a database of pu...[↓ read more ↓] | Alex Doll | ||

testwork | A public database of tumbling mill grindability measurements and their relationships This work presents a public database of over 800 grindability measurements and a set of equations for converti...[↓ read more ↓] | Alex Doll | ||

testwork | Appendix- Conversions between grindability test results Appendix to the Procemin 2017 paper. Provides basis of conversion between different grindability metrics fr...[↓ read more ↓] | Alex Doll | ||

testwork | Correction of Bond Ball Mill Work Index Test for Closing Mesh Sizes It is commonly known that one must run the Bond ball mill work index test such you pick a closing mesh to give...[↓ read more ↓] | Yardin Josefin, Alex Doll | ||

testwork | Designing an optimal comminution sampling program for geometallurgy Paper presented at Procemin 2018. Breakage characteristics of rocks will change as a function of size; this i...[↓ read more ↓] | Alex Doll | ||

static image | Example test database plot Example database chart for the Subscriber Tools page... | sagmilling.com | ||

static image | Example circuit model Example flowsheet page of a circuit model... | sagmilling.com | ||

modelling | Rosin Rammler Regression Spreadsheet Spreadsheet calculation that fits the Rosin Rammler equation to a set of particle size data consisting of an a...[↓ read more ↓] | Alex Doll | ||

modelling | Fitting a Rosin Rammler equation to a 2-value data set Calculation provides a quick way to estimate the Rosin Rammler equation parameters by using two data values to...[↓ read more ↓] | Alex Doll | ||

modelling | JK Ball Mill Model Notes Review of the JKMRC Mineral Comminution Circuits textbook (Reference 1), and discussions with practitioners of...[↓ read more ↓] | Alex Doll | ||

modelling | UBC MINE331 Lecture Notes Memorandum describing the SAG mill & ball mill circuit sizing lecture delivered to the University of British C...[↓ read more ↓] | Alex Doll | ||

modelling | Liner Effective Height Determines the effective mill inside diameter of a given set of "top hat" lifters for use in mill volume and c...[↓ read more ↓] | Alex Doll | ||

modelling | Liner Effective Height Determines the effective mill inside diameter of a given set of "top hat" lifters for use in mill volume and c...[↓ read more ↓] | Alex Doll | ||

modelling | MillFillingCalc Backup to the Mill Filling Calculation spreadsheets that describes the geometry and mathematics.... | Alex Doll | ||

modelling | A comparison of SAG mill power models SAG Mill power draw models are used in mill design and grinding circuit modelling to predict how much power wi...[↓ read more ↓] | Alex Doll | ||

modelling | A simple estimation method of materials handling specific energy consumption in HPGR circuits Multi-stage crushing plants, including high pressure grinding roll (HPGR) circuits, require more materials han...[↓ read more ↓] | Alex Doll | ||

modelling | SAG power draw survey tabulation This LibreOffice spreadsheet contains the raw data used to create Table 1 and Table 2 of the paper "An updated...[↓ read more ↓] | Alex Doll | ||

Modelling | An updated data set for sag mill power model calibration This paper expands the SAG mill survey database published by the Author at Procemin 2013. The new database in...[↓ read more ↓] | Alex Doll | ||

modelling | Fine Grinding, A Refresher Paper presented at CMP 2017. Many power-based grinding models exist, and most operators are familiar with ...[↓ read more ↓] | Alex Doll | ||

modelling | Fine Grinding speaker notes Speaker slides for CMP 2017 presentation "Fine Grinding, A Refresher"... | Alex Doll | ||

modelling | Power-based modelling of single-stage SAG Paper presented at Procemin 2017. Comminution circuit design and geometallurgy is normally performed using ...[↓ read more ↓] | Alex Doll & Miguel Becerra | ||

modelling | A simple method of assessing ball mill health using bond tests and functional performance Health checkups are just as important for grinding circuits as for grinding circuit operators. This paper desc...[↓ read more ↓] | A. Doll, A. Morneau, J-F. Dupont, and D. Michaud | ||

mass balancing | Solving Mass Balances using Matrix Algebra Matrix Algebra, also known as linear algebra, is well suited to solving material balance problems encountered ...[↓ read more ↓] | Alex Doll | ||

mass balancing | Performing Metallurgical Calculations on Spreadsheets Computerized spreadsheets are a commonly used tool in the engineering industry. Unfortunately, they are a very...[↓ read more ↓] | Alex Doll | ||

drives | Motor Power Measurement and Efficiency Diagram Grinding circuit power is commonly used as a defining parameter in circuit design and analysis. However, the c...[↓ read more ↓] | Alex Doll | ||

drives | Choosing the Right Motors for your Mills Slide presentation providing an overview of the process for selection motors for grinding mills. Motors are se...[↓ read more ↓] | Alex Doll & Derek Barratt | ||

drives | The engineering and process effects of choosing a motor design speed Many grinding mill owners choose a variable speed drive for their mill to cope with variations in ore hardness...[↓ read more ↓] | Alex Doll & Kurt Tischler | ||

testwork | Effect of core diameter on the Bond impact crushing work index test The Bond low energy impact (crushing) work index test is specified to be performed on rock specimens between 5...[↓ read more ↓] | Alex Doll | ||

modelling | Rosin Rammler Regression Spreadsheet Spreadsheet calculation that fits the Rosin Rammler equation to a set of particle size data consisting of an a...[↓ read more ↓] | Alex Doll | ||

modelling | Presentation at Universidad Privada del Norte, Cajamarca, Perú Speaker slides from presentation made at the Universidad Privada del Norte, Cajamarca, Perú, November 25, 201...[↓ read more ↓] | Alex Doll, Dave Michaud |