The ball mill is designed to accept a ball charge in accordance with f.C bonds standard.This ball charge consists of 286 balls as follows 44 x 35mm balls 67 x 30mm balls 10 x 25.4mm balls, 71 x 19.05mm balls and 94 x 12.7mm balls fully automated version of the bond index ball mill is also available on request.
Bond ball mill.October 5, 2015.Lab/pilot plant equipment.This 12 x 12 ball mill is universally used for grindability testing and determination of the bond work index.Mill comes complete with ball charge, and control panel with automatic revolution counter.Leave a reply cancel reply.
An improved method using less mass compared to the bond ball mill work index test.The jk bond ball mill (jkbbm) test, is a locked cycle grindability test conducted using a standard laboratory bond ball mill with the same steel ball charge and material feed size (100% passing 3.35 mm) as the bond ball mill work index test.
This paper examines potential relationships between ucs and bond work index values (crushing, rod mill and ball mill).Data from 11 mines located around the world is analysed for correlations between ucs and various wi values.Introduction need to accurately predict future mine and mill production rates requires a knowledge of ore.
Designed by f.C.Bond for use by cement companies and quality control laboratories throughout the world.Can be used in calculating the grindability of all ore.Designed for rapid, high-speed grinding of small samples, these mills utilize stainless steel or hard-faced blades to successfully pulverize even the most difficult materials.These blades either pulse or provide continuous operation.
3- standard bond tests the bonds standard ball mill is used to determine the work index value of differ ent samples.The bond work index is defined as the kilowatt-hours per short ton required to break from infinite size to a product size of 80% passing 100 181m.
The most used equation, for this purpose, is the empirical bond equation (bond, 1960, 1961 rowland and kjos, 1978).In this equation, e is the specific energy required for the grind, and f80 and p80 are the sizes in micrometers that 80% of the weight passes of the mill feed and product respectively.
It provides the bond ball mill work index which expresses the resistance of material to ball milling.This happens after 710 grinding cycles, which shows that the procedure is a lengthy and complex one and is therefore susceptible to procedural errors.
The bond ball mill grindability test measures hardness as an index, regardless of the feed size, so it does not give credit for the additional fines.Therefore, the index itself is ignored in the analysis and the results are assessed in terms of throughput rate or specific energy requirement.The total power for the hpgr system can be compared.
How to calculate p80 ball mill.Bond wi efficiency guideline draft 1 o sag ball mill circuit full example provided this draft o hpgr ball estimate the 80 passing sizes of circuit feed and 4 9 5 8 5 000 how to calculate p80 size distribution pgec co how to calculate p80 ball mill quarry crusher machine for the new plant was designed to treat.
This study was carried out in a standard bond ball mill 305 mm x 305 mm size in mineral processing laboratory, in the mining engineering department at king abdulaziz university, ksa as shown in figure 2.Grinding media of steel balls weighing 20.5 kg has been used.The details of the mill.