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### Ball Mill Design/Power Calculation

Dec 12, 2016· 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

### CORRELATION BETWEEN BOND WORK INDEX AND

The Bond's 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 µm. If the breakage

### Geometallurgy - Wikipedia

The Bond ball mill work index test is thought to be additive because of its units of energy; nevertheless, experimental blending results show a non-additive behavior. [18] The SPI(R) value is known not to be an additive parameter, however errors introduced by block kriging are not thought to be significant .

### A Method of C alculating Autogenous/ Semi-Autogenous

No 1 rod mill/ball mill circuit was operating very efﬁ ciently when comparing the combined operating work indices for both mills with the rod mill and ball mill laboratory work indices. Note, in Figure. 1, that the rod mill product slope is less than 0.5 due to an extra amount of nes present being ﬁ

### (PDF) A quick method for bond work index approximate value

The Bond work index is a measure of ore resistance to crushing and grinding and is determined using the Bond grindability test. Its value constitutes ore characteristic and is used for industrial

### bond ball mill calculations spreadsheet - Sooso Machinery

bond ball mill calculations spreadsheet. Bond ball mill calculations spreadsheet1 About theBondMill Sizing Spreadsheet2 Scope The BondMill Sizingspreadsheetwas designed to determine the most appropriate mill dimensions and Undoubtedly the extensive work of Fred C Bond The Third Theory of of the operational response of conventionalball millsin various grinding"Bond ball mill calculations

### (PDF) A comparison of wear rates of ball mill grinding media

The Ball Mill Abrasion (BMA) test was developed by the University of Queensland Materials Performance group to simulate the high stress abrasion conditions experienced in production ball mills.

### 1-day Technical Seminar

W = Bond's work index (kWh/t) P 80 = particle diameter of product, 80% passing (µm) F 80 = particle diameter of feed, 80% passing (µm) o The Bond's Work Index of a material, which is commonly used in the British Commonwealth as well as US, is determined in a standard laboratory ball mill but the test is cumbersome to perform.

### The Effect of Circulating Load and Test Sieve Size on The

puritic ore, calculated Bond work index is higher with different circulating loads, the Bond work index is higher with lower circulating loads. The purpose of this study to determine the effects of circulating load (CL) and test sieve size (P;) on the Bond ball mill grindability (Ght,) and work index (W,) with natural amorphous silica.

### A New Approach to the Calculation of Work Index and the

2.2. Ball Mill Batch Process The mill dimensions, (D × L), are 0.204 × 0.158 m and it is loaded with 6.5 kg steel balls between 25 and 32 mm in diameter. The mill rotates on rolls and its frequency is set to 70 RPM (1.667 Hertz) corresponding to 85% of the critical frequency. The mill power is P = 16.2 Watts,

### bond ball mill calculations spreadsheet - Sooso Machinery

We have bond ball mill calculations spreadsheet,Bond ball mill calculations spreadsheet1 About theBondMill Sizing Spreadsheet2 Scope The BondMill Sizingspreadsheetwas designed to determine the most appropriate mill dimensions and Undoubtedly the extensive work of Fred C Bond The Third Theory of of the operational response of conventionalball millsin various grinding"Bond ball mill calculations

### Ball Mill Bond Work Inde - technerengineers

Bond Work Index (Energy equation) Grinding . You need a twostage solution, first stage opencircuit mill and then second stage closedcircuit 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 for the fine component (2.1 mm).

### QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE

micrometers in size. According to the Bond standard procedure, the work index is determined by simulating a dry grinding in a closed circuit in the Bond ball mill to achieve 250% circulating load (Bond, 1949, 1952, 1961). The test is performed on a raw material approximately weighing 10 kg, which coarseness is -3.327 mm.

### Ball Mill Operatng Work Index Calculation

Ball Mill Work Index Calculation Candidcamerabe. Ball mill bond work index . A Bond Ball Mill Work Index may also be used in the simulation and optimisation of existing mills and the associated grinding circuits. Sample Requirements A minimum of 10 kg of material crushed to nominally minus 10 mm is preferred. Get Price

### bond ball mill work index determination - parkbankduo.de

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. Chat Online;

### USING THE SMC TEST® TO PREDICT COMMINUTION CIRCUIT

work index covering grinding of fine particles is labelled M. ib (Morrell, 2008). M. ia. values are provided as a standard output from a SMC Test ® (Morrell, 2004. a) whilst M. ib. values can be determined using the data generated by a conventional Bond ball mill work index test (M. ib. is NOT the Bond ball work index). M. ic. and M. ih

### A Method of C alculating Autogenous/ Semi-Autogenous

No 1 rod mill/ball mill circuit was operating very efﬁ ciently when comparing the combined operating work indices for both mills with the rod mill and ball mill laboratory work indices. Note, in Figure. 1, that the rod mill product slope is less than 0.5 due to an extra amount of nes present being ﬁ

### Investigating of the effect of ore work index and particle

Apr 01, 2016· The d80 of ore reached to 480 μm in all samples to prepare materials for ball mill grinding experiments, because d80 of plant ball mill feed in Sungun plant was 480 μm. As a base for this study, standard Bond grindability tests were initially done and Bond work index (Wi) values were calculated for samples from the Eq.

### mining ball mill work index equipment 」

The method is equally applicable to assessing theand the Bond Ball Mill Work Index Test GMG, 2016a. The. Inquire Now; Evaluation Index of Ball Mill Grinding WorkXinhai. Ball mill operating rate is the ratio, which the actual time of operating is to the total hours calendar during the work. The ration is usually calculated once a month.

### 3 index bond ball mill grinding mill china

Measuring ore grindability in balls mills. The Bond Ball Mill Work Index is a measure of the resistance of the material to grinding in a ball mill. bond index mill for grinding china-SBE. QM-3 Measuring Grinding Work Index Lab Ball Mill for ceramics, chemical industrial laboratory . Grinding work index (BOND), referring to the grindability

### Bond Work Index Tables (Wi) | Rock (Geology) | Minerals

Bond Work Index Tables (Wi) - Free download as PDF File (.pdf), Text File (.txt) or view presentation slides online. Here there are given tables from various sources for the Bond work index values of mining materials (ores, industrial minerals and rocks). These work indexes can be used for the determination of tumbling mills (rod, ball mills) power.

### 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

### Bond Work Index Tests - Grinding Solutions Ltd

The Bond Ball Mill Work Index (BBWi) test is carried out in a standardised ball mill with a pre-defined media and ore charge. The Work Index calculated from the testing can be used in the design and analysis of ball mill circuits.