To calculate the profitability index for the new factory project, the present value of the future cash flows is calculated using the same formula: PV = $300,000 / (1 + 0.10)^1 + $300,000 / (1 + 0. ...
The operating work index, Wiop, can be obtained using Bond's equation by defining W as the specific energy being used (power draw/new feed-rate), f80 and p80 as the actual …
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 …
Calculate and record the K80 value. BOND Work Index Calculations: Calculate the average value of the last three cycles Net/Rev; Record the value. The Work Index (BWi) is calculated according to Fred Bond's Equation. Bond Work Index for Testing Procedure. Cleaning and Storing of Ball Mill Charge after the Bond Work Index Procedure is done:
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.
911 Metallurgist is a trusted resource for practical insights, solutions, and support in mineral processing engineering, helping industry professionals succeed with proven expertise. | Mill Operating Work Index Calculator (Ball/Rod/SAG)
To calculate the operating work index of a circuit, you must measure four things: P: The power draw of the mill.
A new operating work index was calculated as 23.2 kWh/t based on the following. Minerals in operation. 2. Size reduction. 3. Crushing. Grinding. Size control. ... To calculate crusher work index - creatistnl calculate crusher work index - hometbmuebleriasmx the effects of blasting on crushing and grinding - calculate crusher work index one ...
First, calculate the actual Operating Work Index, WloACT-, of the grinding circuit. • Estimate the 80% passing sizes of circuit feed and product, F80 and P80, in microns • Calculate W, the …
Calculate the Operating Work Index – Crusher,crusher solution …. Home>Crusher Solution>Vertical roller mill> Calculate …Operating work index has the same definition as "work index" which states that "work index is the power … » Free online chat! How to Use Bond equation to calculate work indices from operating …. To distinguish this from the work index …
Question: 2. A SAG mill operates with a 10,000 hp motor. Typical power draw is 80% of maximum. The 80 percent passing feed size to the mill is 6 inches and the mill discharge has an 80 percent passing size of 2.3 mm. Calculate the Operating Work Index for this mill if the feed tonnage rate is 1175 tonnes per hour.
ies comparing operating work indices to the work indices obtained from grindability tests were made. A report on these studies was given in a paper titled "Comparison of work indices calculated from operating data with those from laboratory tests" (Rowland. 1973). W. W 10 = pO.5 _ FO.5 (2) Where Wio is the operating work index in kilo
The Bond_Op. Work Index spreadsheet estimates the operational work index of a grinding installation based on Bond's Law and the Hogg & Fuersteneau Power Model. It requires input of dimensions, operating conditions, feed size, product size, and throughput to calculate the specific energy consumption and determine the operational work index. The example provided is for a …
The grindability of raw material is generally determined by Bond's standard ball mill grindability test (developed by the Allis Chalmers company).
The Bond work index (BWI) is a well-known method used when selecting comminution equipment, to evaluate the grinding efficiency and to calculate the required grinding power.
911 Metallurgist can enter the scene and see what you have become blind to. We can fix issues in ways you never thought possible. Our fresh eyes will open new opportunities for your plant. Each mineral processing plant has varied ore types, mining equipment, (crusher, ball mill, flotation, tailings), and management (operating) philosophy.The evaluation and prioritization of variables …
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 ...
operating CG = (Total IU * the convenient moment) / Total weight (mass if you prefer). If you have decided to call the operating CG the dry operating weight CG then you would call the total IU the dry operating index. Is the DOI the same as the no of inches from the LEMAC to the CG at DOM?
The Bond work index (BWI) is a well-known method used when selecting comminution equipment, to evaluate the grinding efficiency and to calculate the required grinding power.
The mill design, operating conditions, and ball size distribution were based on Bond's (1961 a,b) work index methodology and are shown in Table 2. Download: Download high-res image (99KB) Download: Download full-size image; ... The Product Simulated at 250% CL determines the P 80 required to calculate the work index in Bond equation (Eq. (17).
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The operating work index, Wiop, can be obtained using Bond's equation by defining W as the specific energy being used (power draw / new feedrate), f80 and p80 as the actual feed and …
The self-grinding work index is an extension of the concept of Bond work index. It generally refers to the work index calculated by using Bond's fracture theory on the principle of ore crushing energy consumption according to the W, F, and P data of a small or semi-industrial or industrial self-grinding test. In this kind of test, McPherson small self-grinding closed-circuit …
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Example A grinding circuit is processing 450 t/h (of dry feed) with a mill drawing 3,150 kW. The circuit feed is 80% passing 2,500 µm, and the circuit product is 80% passing 212 um. Calculate (a) The work input (b) Operating work index (c) The …
The Bond work index (BWI) is a well-known method used when selecting comminution equipment, to evaluate the grinding efficiency and to calculate the required grinding power. Although considered an industry standard, Bond did not fully define that procedure, and therefore significant discrepancies in test results can sometimes be obtained due to ...
The work index Wi was defined by F. Bond as the specific energy (kWh/ton) required to reduce a particulate material from infinite grain size to 100 microns. ... A Rittinger operating index was ...
The Bond work index (BWI) is a well-known method used when selecting comminution equipment, to evaluate the grinding efficiency and to calculate the required grinding power.