### Bond Work Indexan overview ScienceDirect Topics

The ability to simulate the Bond work index test also allows examination of truncated ball mill feed size distributions on the work index For grinding circuits where the feed to a ball mill is sent directly to the classifier and the cyclone underflow feeds the ball mill see Figure 3.10 a question arises as to whether this practice will alter the ball mill work index BW i of the material

Chat Online### Investigation on Iron Ore Grinding based on Particle Size

The feed samples of X Y and Z iron ores were ground in the BBM ball mill refers to a BBM of size 300 mm 300 mm with smooth liners to identify the PSD BWI and RT of each ore Grinding experiments were conducted according to Bond s standard test procedure .For each iron ore sample the RT taken to produce 250 circulating load in the BBM was measured by a new method.

Chat Online### A Bond Work index mill ball charge and closing screen

An alternative mill ball charge is proposed that closely approximates Bond s original total ball mass number of balls and ball surface area Results of 30 Bond Work index tests of six pure materials calcite magnesite labradorite feldspar quartz andalusite and glass using closing screen apertures P 1 values of 500 250 125 90 and

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Chat Online### ore abrasion index for coal grinding mill china

The ball mill work index laboratory test is conducted by grinding an ore sample prepared to 100 passing 3.36 mm 6 mesh to product size in the range of 45 150 µm mesh thus determining the ball mill work index Wi B or BWi The work index calculations across a narrow size range are conducted using the appropriate laboratory work Read More

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in a closed circuit dry grinding environment The ground product for the laboratory SAG mill is then submitted to the Bond ball mill work index test The number of SAG mill revolutions required to grind the material to a P 80 of 1.7 mm is used to predict AG/SAG specific energy using quation 4

Chat Online### Bond Work Index Procedure and Method

Cleaning and Storing of Ball Mill Charge after the Bond Work Index Procedure is done Add about 500 g of silica sand into the mill containing the ball charge Seal the mill Rotate for 20 revolutions to clean Empty the mill charge and sand into the ball try once grinding is complete Clean out the mill using a brush Put the lid on the mill.

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Chat Online### Bond Efficiency GMG ICE v1 r04 Determining

µm Note that in order for no correction factor for ball mill product fineness to apply the ball mill circuit P80 should be no less than approximately 70 µm Bond 1962 This Bond Efficiency determination should not be applied to cir cuits with a P80 finer than approximately 70 µm without making qualifications 3.

Chat Online### Bond Work Index Energy equation Grinding

1 day ago 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 Bond rod mill work index for the coarse component of the ore 2.1 mm and the Bond ball mill work index

Chat Online### Ball Mill Used in Minerals Processing Plant Prominer

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Chat Online### Calculation of energy required for grinding in a ball mill

INTRODUCTION The energy consumption for grinding according to Bond 1961 is deter mined by the formula 10 10 I The work index is determined by grinding experiments carried out in a labo ratory Bond ball mill Based on the results of grinding experiments numerical values of the work index Wi are calculated according to the formula

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Chat Online### An innovative approach for determining the grinding

1 Introduction Grinding operation is used extensively in the industry of beneficiation metallurgy chemical engineering and electric power Assisted by the impact and abrasion between media steel ball steel rod gravel ceramic ball and ore the grinding operation reduces the particle size in the mill .To produce the qualified size and high liberation of granule for the subsequent

Chat Online### Kinetic grinding test approach to estimate the ball mill

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Chat Online### Ball Mill Used in Minerals Processing Plant Prominer

This ball mill is typically designed to grind mineral ores and other materials with different hardness and it is widely used in different fields such as ore dressing building material field chemical industry etc Due to the difference of its slurry discharging method it is divided to two types grid type ball mill and overflow type ball mill.

Chat Online### Evaluation Index of Ball Mill Grinding WorkXinhai

Grinding operation is the final stage of preparation before the election The ore is impacted and ground by balls or itself in the ball mill marketing ytxinhai 0086 Language.

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Chat Online### Optimizing Performance of SABC Comminution Circuit of

the SAG mill and ball mill was 8658 kW which caused partial over grinding From experience in processing plants outside of China the power rating of the ball mill should be higher than that of the SAG mill 5 The pebble crusher had an over powered configuration The installed power draw of 630 kW

Chat Online### Application of Operating Work Indices in Autogenous

Ball Mill Wio BWio 8.6 Circuit Wio OWio 14.6 Bond Ball Mill Work Index BWi kWh/t 13.4 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

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