网页The Bond work index (Bond, 1960) is based on Bond’s law, which states that the energy consumed is proportional to the 1.5 power of particle size rather than the square of Rittinger’s law

Contact网页2022年10月1日Volume 188, October 2022, 107822 A new methodology to obtain a corrected Bond ball mill work index valid with non-standard feed size Vladimir Nikolić a

Contact网页1. Calculate the Actual Operating Bond Work Index of the grinding circuit. • Estimate the F80 and P80. • Calculate the work or specific energy input from the size reduction

Contact网页E=10×Wi( 1 ( 1)√P − √F 8080) Where: E is the specific energy consumption in kWh/t Wi is the work index (see discussion below for the units of this quantity) P80 is the 80%

Contact网页2017年1月1日Bond's work index determination, since its inception in 1952, is being used to estimate the power required for milling, sizing of mills and calculation of milling circuit efficiency.

Contact网页2015年6月6日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

Contact网页2015年11月22日The Bond rod mill work index (Wi RM, or RWi) conducted from a feed size of approximately 10 mm to a product size on the order of 1 mm. The Bond crushing (impact) work index (Wi C, CWi,

Contact网页1 like by David You need a two-stage solution, first stage open-circuit mill and then second stage closed-circuit mill. First stage, will be broken into two parts as well, you use a

Contact网页2016年3月31日Unrelated ‘entertaining’ image. The specification for the apparatus to determining a “Bond” rod mill work index is first described in BondMaxton (1943). It states that the apparatus is a tumbling rod mill

Contact网页2021年5月1日Correction of Bond Ball Mill Work Index Test for Closing Mesh Sizes. Procemin-Geomet 2018. 14th International Mineral Processing Conference5th International Seminar on Geometallurgy, 28-30 November, Santiago, Chile, 1-12. Google Scholar. Kapur, 1970. P.C. Kapur. Analysis of the Bond grindability test.

Contact网页2018年12月7日The test work program was carried out on those five ore samples obtained from the copper-porphyry orebodies. Total of 38 Bond work index tests, including duplicates, were done. Standard Bond ball mill test procedure were carried out on crushed (-3.35 mm / 6 mesh) material at different

Contact网页Bond Work Index Test Ball Mill. US$ 14,500. The FC Bond Work Index Test Ball Mill was designed by F. C. Bond for use in determining the Bond Index, a measure of grindability and power required for grinding

Contact网页2021年5月1日Results and discussion. The results of determining the grindability on a sample of zeolites on fine size classes are shown in Table 3. Based on the obtained results, it was determined that the BWI for fine materials can be calculated as follows: W Fm = k ∙ W i F Fm 0.05 where in: W Fm BWI for fine materials, (kWh/t);

Contact网页2021年7月12日Menéndez-Aguado et al. examined the possibility of determining the work index in a Denver laboratory batch ball mill with the same inner diameter as the Bond ball standard mill. The research was

Contact网页2015年6月19日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

Contact网页Where, WioACTis the Actual Operating Bond Work Index (kWh/t), W is the specific energy input (kWh/t), P80 is the 80% passing size of product (µm), and F80 is the 80% passing size of circuit feed (µm). 2. Calculate the Standard Circuit Bond Work Index (WiSTD) for the material being processed (equation 3). Wtotal

Contact网页2017年1月1日Bond's work index determination, since its inception in 1952, is being used to estimate the power required for milling, sizing of mills and calculation of milling circuit efficiency.

Contact网页2011年1月1日The Bond ball mill test is used to determine the so-called standard work index, which is defined as the specific energy consumption (in kWh/t) required to reduce a material from a notional

Contact网页Bond models, SGI, Morrell Mi. The Bond ball mill work index is one of the most commonly used grindability tests in mining, and is often referred to as the Bond work index . The test is a 'locked-cycle' test where ground product is removed from test cycles and replaced by fresh feed. The test much achieve a steady-state before completion.

Contact网页The Work Index is used when determining the size of the mill and grinding power required to produce the required ore throughput in a ball mill. 2. Procedure 2.1. Bond Ball Mill Grindability The sample was crushed to 100% passing 6 mesh (3.35mm), from this a 700 cc volume was measured and weighed to be used as feed for the Bond Mill.

Contact网页Bond Standard Circuit Work Index: Assume the rod mill Work Index of 9.5 applies from the actual rod mill feed sizeof 19,300 mµ (although some of this work might ideally be done by crushers to achieve a rod mill F80 of 16,000 m) to a rod µ mill (circuit) product size of 1,000 µm. W Total = 2.32 + 4.77 = 7.09 very large size (FkWh/t of . 9.70

Contact网页2016年12月10日For the evaluation of laboratory and industrial experiments, the work index can be determined as follows: BWI = 44.5 P 1 0.23 × G 0.82 10 P − 10 F where BWI = Bond's work index (kWh/sh. Ton), F = 80% passing size of original feed (μm), P = 80% passing size of circuit product (μm), P 1 = Test-sieve size (μm) and G = Net grams of

Contact网页2021年6月17日The Bond work index most commonly referred to is the BBM work index. This value is obtained in a 12” 12” laboratory mill running at 70 rpm, with rounded inner edges and without lifters. The grinding charge is comprised of a distribution of steel balls with several diameters. Table1shows the original Bond proposal [13], while the last Bond

Contact网页2020年12月4日This chart is adapted from the large number of ball mill tests done by Yardin Josefin, which were presented at Procemin in 2018. The work index of this copper ore drops as you grind finer until

Contact网页21 CONCLUSIONS Continued In the present work, equations were also derived, giving: zthe ball-mill power drawP as a function of its dimensions: internal mill diameter D and length L, zthe ball-mill power drawP as a function of the feed D f (mm) and the product size d (mm), the Bond work index w i (kWh/short ton) and the mill throughput T (short

Contact网页2011年7月1日The Bond work index is defined as the specific energy required to reduce a particulate material from infinite grain size to a size of 100 microns (Stamboliadis, et al., 2011).

Contact网页2019年4月8日A test sample is stage-crushed to a 3.5mm maximum feed size and compacted into a 700cc tube. Once properly measured, the sample is placed in a universal F.C. Bond Ball Mill to accurately calculate the Bond Work Index of the material. After a set number of revolutions, the sample is removed and screened over a 100 mesh sieve.

Contact网页2015年10月15日Bond work index mill behaviour. Fig. 2 shows the mass per size fraction and revolution count for each run of each sample. Using non-linear regression analysis, the biomass best fit line was determined by Gauss–Newton method is

Contact网页operating work index is given as kilowatt -hour per metric ton (kWh/t), then the calculated work index is power per metric ton. For closed-circuit grinding, F is the feed to the circuit before adding the circulating load, and P is the product after removing the circulating load. Bond (1952, 1960) defined the work index as "The com

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