﻿ ball mill operatng work index calculation

# ## Solutions & Cases

Our Case
• ### Calculate a Mill's Operating Work Index

Use this online formula to calculate a Ball Mill, Rod Mill or SAG Mill Operating Work Index. Based on Fred Bond’s work you can estimate the energy used into your grinding circuit. This is the most accurate and informative method, but much of the data necessary for its application is not yet available. A) Total Apparent Volumetric Charge Filling including balls and excess

• ### Ball Mill Design/Power Calculation LinkedIn

12/12/2016· Ball Mill Power Calculation Example A wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work index of 15 and a size distribution of 80% passing ¼ inch

• ### Ball Mill Design/Power Calculation

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 mill tonnage capacity DTPH, operating % solids or pulp density, feed size as F80 and maximum ‘chunk size’, product size as P80 and maximum and finally the type of circuit

• ### Operating work index is not the specific energy consumption

24/10/2018· The work index can either be measured in the laboratory (the Bond ball mill work index determination is a common example) or it can be calculated from the operating performance of a milling circuit...

• ### Ball Mill Operatng Work Index Calculation

Ball Mill DesignPower Calculation. Based on Fred Bonds work you can estimate the energy used into your grinding circuit. Ball mill cost calculation Henan mining machinery and ball mill design calculator describes bond ball mill index jktech a bond ball mill performance index test may need to be calculated for designing a new mineral ball mill 165 view peter&x is a

• ### Bond Work Index an overview ScienceDirect Topics

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 (325-100 mesh), thus determining the ball mill work index (WiB or BWi).

• ### 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. The test requires a minimum of 10kg of sample that has been stage-crushed to 100% passing size of <3.35 mm. Any screen size below 600µm can be

• ### Bond Work Index an overview ScienceDirect Topics

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 (325-100 mesh), thus determining the ball mill work index (WiB or BWi).

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

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, calculated by the formula provided by Stamboltzis . PMN 9.9 (6) where . M (kg) is the

• ### 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. The test requires a minimum of 10kg of sample that has been stage-crushed to 100% passing size of <3.35 mm. Any screen size below 600µm can be used for the testwork

• ### Ball Mill Design Calculation Xls gstours-brackenheim.de

Ball Mill Design Calculation Xls Akademie Abbasi. Ball mill calculations excel inrem ball mill designpower calculation 2018621 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 mill tonnage capacity dtph operating solids or pulp density

• ### Operating work index is not the specific energy

09/04/2019· The Work Index is a fitted coefficient to Bond’s equation given in the picture above. The work index can either be measured in the laboratory (the Bond ball mill work index determination is a common example) or it can be calculated from the operating performance of a milling circuit (which would be an operating work index).

• ### AMIT 135: Lesson 7 Ball Mills & Circuits Mining Mill

Work Index; Mill shaft power; Specific gravity of the rock; Bond developed an expression for capacity that accounts for each of these factors. A ball mill in situ and operating in Alaska. Mill Throughput Capacity. Bond expressed mill capacity as a function of mill shaft power (PM, kW) and the energy required for particle breakage (kWh/f):Q = Pâ†“M / E; The expression for mill shaft power

• ### online ball mill calculation vet-slinckx

Ball Mill Design/Power Calculation. 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 mill tonnage capacity DTPH operating solids or pulp density feed size as F80 and maximum chunk size product size as P80 and maximum and finally the type of

• ### Ball Mill: Operating principles, components, Uses

The degree of milling in a ball mill is influenced by; a. Residence time of the material in the mill chamber. b. The size, density, and number of the balls. c. The nature of the balls (hardness of the grinding material) d. Feed rate and feed level in the vessel. e. Rotation speed of the cylinder. Several types of ball mills exist. They differ to an extent in their operating principle. They

• ### Ball Mills Mine Engineer.Com

This formula calculates the critical speed of any ball mill. Most ball mills operate most efficiently between 65% and 75% of their critical speed. Photo of a 10 Ft diameter by 32 Ft long ball mill in a Cement Plant. Photo of a series of ball mills in a Copper Plant, grinding the ore for flotation.

• ### SAGMILLING.COM .:. Articles

It is commonly known that one must run the Bond ball mill work index test such you pick a closing me sh to give [↓ read more ↓] Yardin Josefin, Alex Doll: testwork: Designing an optimal comminution sampling program for geometallurgy [] Paper presented at Procemin 2018. Breakage characteristics of rocks will change as a function of si ze; t his i [↓ read more ↓] Alex Doll