As may be seen from the table, a separation at S.G. 2.75 would result in a float product of 68.5% of the weight contain 3.8% of the tin of that size fraction. Laboratory separations in heavy liquids are “ideal” – all the sinks should report to the sinks and all the floats to the floats. … Read more
Filtration is defined as the separation of insoluble solids from a liquid by forcing a portion of the liquid through a porous medium by a pressure differential, while the solids are trapped on the surface or in the depth of medium. The two main methods that exist to create the required pressure differential are: Application … Read more
The basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are; material to be ground, characteristics, Bond Work Index, bulk density, specific density, desired mill tonnage capacity DTPH, operating % solids or pulp density, feed size as F80 and maximum ‘chunk size’, product size as P80 and maximum and finally the … Read more
We can calculate the steel charge volume of a ball or rod mill and express it as the % of the volume within the liners that is filled with grinding media. While the mill is stopped, the charge volume can be gotten by measuring the diameter inside the liners and the distance from the top of the charge to … Read more
This table of various minerals (ore, rock types) listed by their tested SG specific gravity complements the BWi List found in earlier post. Source 1: Table of materials reported by Fred Bond Source 2: Outokumpu, The science of comminution Source 3: Equipment and pipelines Source 4: Tenova Bateman mills (AG/SAG, Rod, Ball Mills) Source 5: … Read more
The Bond Ball Mill Grindability test is designed to give a measure of the grinding characteristics of a material by finding the amount of size reduction resulting from a controlled energy input. Ball Mill Grindability of a material depends upon its hardness, structure, the manner in which it is fractured. The grindability is useful in evaluating power requirements … Read more
Nothing contained in the calculators, equations or other information on this website constitutes advice. Access to the calculators, equations and other information is donated for academic and research purposes only, and must only be used by qualified comminution/process engineers. Comminution/Process engineers considering the calculators, equations and other information must use their own professional judgement, knowledge … Read more
Finding a good and the right mineral processing laboratory and have your testing filled properly is important. Most metallurgical laboratories now are actually specialized. They will claim to “do-it-all” while what they can actually do truly depends on who their current staff is. You have hear the cliché on people are our greatest asset? Well, it … Read more
This Grindability Test or Bond Ball Mill Work Index Procedure is used to determine the Bond Work Index of minus six mesh or finer feed ore samples. These equation application methods are used to process <1/2″ ore samples in a Ball Mill using a standard ball charge. Below describes in general terms the Bond Work Index … Read more
