rod milling, is fitted to a tumbling test, referred to as the Bond rod mill work index (WiRM, or RWi). The apparatus used to determine this work index was described in 1943 by Bond & Maxton and a slightly different apparatus was described by Bergstrom in 1985
Get PriceThe model was validated for four materials, showing that it can predict the Bond rod mill work index with deviations below 10%. Requiring only 1.5–3kg of sample, the procedure is demonstrated to
The Bond Work Index for Rod Mill is a special equipment for testing Bond rod mill work index. Simple lab test can choose rod mill by power method or judge the effects of material properties change to the rod milling process or the operation condition of rod mill by using this equipment. From 1980s, the company developed the equipment and
For comparing the standard Bond rod-mill work index and the new modeled method, work... Read more. Bate SSA A4 feb12_Layout 1 - saimm. approaches, e.g. the Bond work index, would ... the design of ball and rod mill circuits and was ... that, for the size ranges typical of ball mills
Bond Rod Mill Grindability Test. Grinding Solutions can carry out Bond Rod Mill Work Index tests to determine the energy requirements for milling ore in a rod mill. The test requires a minimum of 20kg of -12.5mm material. Closing screen sizes typically range from 4.75mm to 212 m. Abrasion Index Test
FIGURE 5: BOND ROD MILL WORK INDEX v. UNCONFINED COMPRESSIVE STRENGTH 0 100 200 300 400 UCS (MPa) 5 10 15 20 25 30 35 WiRM (metric) The lack of fit observed relating the crushing Work Index was expected to carry over to the other Bond Work Indices. Figure 5 displays the plot of rod mill Work Index (Wi RM) versus UCS. These
Bond Test WI’s (kWh/t): Rod Mill: Ball Mill: 9.5 kWh/t.8 9 kWh/t . Bond Standard Circuit Work Index: Assume the rod mill Work Index of 9.5 applies from the actual rod mill feed sizeof 19,300 m (although some of this work might ideally be done by crushers to achieve a rod mill F80 of 16,000 m) to a rod
The mill power is = 22.5 Watts, calculated by (6). Fi- P nally the product is wet screened to find the size d80. 2.4. Rod Mill Semi Continuous Process The same mill is used for the semi continuous grinding tests which is similar to the Bond test but with the exist- ing mill of known power. After time the mill
In conjunction with the Bond ball mill work index they can be used to accurately predict the overall specific energy requirements of circuits containing: AG and SAG mills, Ball mills, Rod mills, Crushers, High Pressure Grinding Rolls (HPGR)
determination of the work index for ball and rod mills in 1952 and modified it in 1961. The standard Bond ball mill grindability test is a closed circuit dry grinding test with a 250% circulating load. The standard procedural outline of the test is stated in (Bond) 1961. The work index for a ball mill, Wi, is then calculated from the following
In the Bond ball mill test, the work index is finally obtained. by. w. P Gbp PF. i = ... [Show full abstract] different characteristics of rod mill and ball mill, solving the grinding problem of
Assume the test Wi of the rod mill (9.5) applies from the actual rod mill feed size of 19,300 m (although some of this work might ideally be done by crushers to achieve a rod mill F80 of 16,000 m) to a rod mill (circuit) product size of 1,000 m. 10 10 W1( –––––––－–––––––––) (
The Bond rod mill work index is not as common as the Bond ball mill work index, and there are two different variations on the mill apparatus. The SAGMILLING.COM models expect a mill with a wave liner , and is not compatible with mills using smooth liners . Most laboratories outside of Australia use the wave liner style of machine – these results can safely be used in the models
For comparing the standard Bond rod-mill work index and the new modeled Bond work index Rod-mill method, work index (Wi) and produced fine particles in a cycle (Gi) for the four samples determined. Grinding kinetics The performed paired Student’s t-test results indicated that the Standard Deviation for Gi and Wi obtained Shortened method by
The Titan Bond Work Index Rod Mill is one-piece cast construction with integral wave liners of a form described by Bond. This mill is used to perform the necessary metallurgical testing to determine the grinding characteristics of ores and power requirements for operating production-size rod mills
The Bond Index conforming rod charge consists of: 6 rods of 1.25“ diameter and 21“ length 2 rods of 1.75“ diameter and 21“ length The grinding jar for the Bond Index Rod Mill is 12″ x 24″ in size and has a wave-shaped design
Bond Rod Mill Work Index, RWi, kWh/t 18.1 Table 1. Example of AG/SAG Ball Mill Circuit Wio Calculations [1] [2] ABstrAct Optimum use of power in grinding, both in terms of grinding efficiency and use of installed capital, can have a large effect on profitability. Mill operators have long used operating work indices to evaluate grinding circuit
The low energy crushing work index laboratory test is conducted on ore specimens larger than 50 mm, determining the crushing work index (Wi C, CWi or IWi (impact work index)). The rod mill work index laboratory test is conducted by grinding an ore sample prepared to 80% passing 12.7 mm ( inch, the original test being developed in imperial units) to a product size of approximately 1 mm (in the original
Office Add: Kexue Revenue, High and New Technology Industrial Development Zone, Zhengzhou, China
Email: [email protected]