### On the assessment of ore grindability and bond work index

On the assessment of ore grindability and bond work index for mill control . By G.K.N. Subasinghe and J.L. Kanau. Abstract. In this study some drawbacks of using Bond grindability as a measure of grindability characteristics for mill control have been discussed. After reviewing the merits of alternative methods of determining the Bond

Chat Online### USING THE SMC TEST® TO PREDICT COMMINUTION

2020-3-24 · = fine ore work index (kWh/tonne) P. 1 = closing screen size in microns . Gbp = net grams of screen undersize per mill revolution . p. 80 = 80 passing size of the product in microns . f 80 = 80 passing size of the feed in microns . Note that the Bond ball work index test should be carried out with a closing screen size

Chat Online### 20150505 Bond Efficiency-GMG-ICE-v1-r04 Determining

2020-9-24 · Where WiSTDis the Standard Circuit Bond Work Index (kWh/t) and WioACTis the Actual Operating Bond Work Index (kWh/t). • If the Wi Efficiency Ratio is 1.0 or 100 the circuit is per-forming with the same efficiency as the Bond Standard Circuit (and the ore Wi = circuit operating Wi) in accor-dance with the correlation that Bond (1962

Chat Online### On the assessment of ore grindability and bond work index

On the assessment of ore grindability and bond work index for mill control . By G.K.N. Subasinghe and J.L. Kanau. Abstract. In this study some drawbacks of using Bond grindability as a measure of grindability characteristics for mill control have been discussed. After reviewing the merits of alternative methods of determining the Bond

Chat Online### JKTech Technical Article

• Grindability as indicated by the bond ball mill work index (BWi) ranged from 10–35 kWh/t with the majority between 15 and 27 kWh/t. No clear relationships in terms A b and/or BWi was identified with geological aspects logged from the drill core such as weathering lithology alteration alteration intensity veining or combinations of these.

Chat Online### On the assessment of ore grindability and bond work index

On the assessment of ore grindability and bond work index for mill control . By G.K.N. Subasinghe and J.L. Kanau. Abstract. In this study some drawbacks of using Bond grindability as a measure of grindability characteristics for mill control have been discussed. After reviewing the merits of alternative methods of determining the Bond

Chat Online### USING THE SMC TEST® TO PREDICT COMMINUTION

2020-3-24 · = fine ore work index (kWh/tonne) P. 1 = closing screen size in microns . Gbp = net grams of screen undersize per mill revolution . p. 80 = 80 passing size of the product in microns . f 80 = 80 passing size of the feed in microns . Note that the Bond ball work index test should be carried out with a closing screen size

Chat Online### Odisha ferrochrome producers seek lower chrome ore floor

2021-4-12 · According to the association chrome ore offtake has fallen sharply owing to the high floor price and only 7.5 percent of the total volume of 32 600 mt of chrome ore on offer at an auction held on March 15 was purchased. In the previous auction held on February 10 only 7.3 percent of the total of 32 700 mt of chrome ore put up for bidding was

Chat Online### - Test methods for characterizing ore comminution

2016-10-19 · behavior although the applied fracture mechanism of the mill cannot be excluded. With crushed ore samples from Malmberget also grindability tests and mineral liberation analyses were conducted using laboratory tumbling mills of different size. Starting from the dimensions of the Bond ball mill a modified test method was

Chat Online### Price book Metal Bulletin

Our price data is now available through our platform Access the price data and news you need through. the tools that best suit your needs. Customize your view in our new Dashboard viewing. only the markets and info you need. Enjoy more convenience with our upgraded Excel

Chat Online### Bond Work Index (BWI) Test — Celtest

2018-10-18 · Celtest have the capability to carry out the Bond Work Index (BWI) Test in accordance with EPRI Report CS3612 FGD Chemistry and Analytical Method Handbook Volume 2 . The BWI is used to estimate the required mill power per ton of product (Specific Energy). The specific energy requirement

Chat Online### Bond Work Index Procedure and Method911 Metallurgist

2015-6-6 · The F.C. Bond Ball Mill is a small universal laboratory mill used in calculating the grindability of all ores. GRINDABILITY IS THE NUMBER OF NET GRAMS OF SCREEN UNDER-SIZE PRODUCED PER REVOLUTION OF THE MILL. Attached file is the Bond index

Chat Online### Mineral ProcessingSlideShare

2014-5-15 · Wi = The Bond Ball Mill Work index ( 1952 )- is a measure of the resistance of the material to crushing and grinding . A Bond Ball Mill Work Index test may be required for the design of a new mineral processing plant . It is determined by Bond Ball Mill Grindability test in a lab using a Bond Mill.

Chat Online### Asian MetalChrome ore prices news and research

Asian Metal provides comprehensive coverage and analysis of the global chrome ore industry. Professional reliable reports outline the latest trends and developments keen precise price analysis keeps you at the cutting edge of the market and exclusive statistics on both imports exports as well as production and marketing provide the tools to take your business to the next level.

Chat Online### On the assessment of ore grindability and bond work index

### 20150505 Bond Efficiency-GMG-ICE-v1-r04 Determining

2020-9-24 · Where WiSTDis the Standard Circuit Bond Work Index (kWh/t) and WioACTis the Actual Operating Bond Work Index (kWh/t). • If the Wi Efficiency Ratio is 1.0 or 100 the circuit is per-forming with the same efficiency as the Bond Standard Circuit (and the ore Wi = circuit operating Wi) in accor-dance with the correlation that Bond (1962

Chat Online### Relationships between comminution J energy and

2010-4-21 · observed that the Bond ball mill work indices for the ore (Wi) varies from 14.6 to 20.9 kWh/t. The relationship between the ore hardness and iron content presented in Figure 2 indicates that the samples with a higher magnetite content (Fe ) are softer (lower bond work index) suggesting that the magnetite in the ore may be softer than the non-magnetic component. Based on that one

Chat Online### Comparison of UCS to Bond Work Indices

grindability well in advance of when ore are actually mined. Traditional measurements of ore grindability are the Bond Work Index (Wi) values (Bond 1952) divided into a low energy crushing work index (Wi C) for coarse rocks (75-50 mm) a rod mill work index (Wi RM) for intermediate sized particles (25-3 mm) and a ball mill work index (Wi

Chat Online### JKTech Technical Article

• Grindability as indicated by the bond ball mill work index (BWi) ranged from 10–35 kWh/t with the majority between 15 and 27 kWh/t. No clear relationships in terms A b and/or BWi was identified with geological aspects logged from the drill core such as weathering lithology alteration alteration intensity veining or combinations of these.

Chat Online### CORRELATION BETWEEN BOND WORK INDEX AND

2014-6-27 · 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 characteristics of a material remain constant over all size ranges the calcul ated work index would be expected to remain constant since it indicates the

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

1961). Bond s third theory is presented in 1 . By rearranging the formula to 2 the operating work index (Wio) of an existing grinding circuit can be calculated given known mill power draw throughput feed and product size distributions. kWh/t = Power applied per ton of feed to the grinding unit Wi = The standard Bond work index of the ore P 80

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

2018-2-20 · a method using Bond Indices than adding a single factor of 1.25 to arrive at the AG/SAG speciﬁ c energy. In 1991 the Canadians developed the SAGPower Index (SPI) test using 2 kg of material in a 300 mm diameter mill. This test has been further developed by Starkey Hindstrom and Orser (2006). This test now includes a Bond Ball mill work

Chat Online### PriceFerroAlloyNet

2021-6-25 · Jun 25 Pakistan chrome ore fines 30-32 price by one trader on 25 June 2021 Jun 25 Iran chrome ore market price on 25 June 2021 Jun 25 Pakistan chrome ore market price on 25 June 2021

Chat Online### Bond Work IndexDetermination of the Bond Work Index of

Lastly substituting all the values in equation 1 the Bond work index of the ore was determined to have a value of 41.38 kWh/tone. The Bond work index in addition to it as being the measure of the material s hardness or resistance to crushing and grinding gives an important indication of the efficiency of the machine being used. The larger the Bond work index the larger the consumption of

Chat Online### USING THE SMC TEST® TO PREDICT COMMINUTION

2020-3-24 · = fine ore work index (kWh/tonne) P. 1 = closing screen size in microns . Gbp = net grams of screen undersize per mill revolution . p. 80 = 80 passing size of the product in microns . f 80 = 80 passing size of the feed in microns . Note that the Bond ball work index test should be carried out with a closing screen size

Chat Online### Comminution testingJKTechUniversity of Queensland

2020-7-30 · A Bond Ball Mill Work Index may also be used in the simulation and optimisation of existing mill(s) and the associated grinding circuit(s). Sample requirements A minimum of 8 kg of material crushed to nominally minus 10 mm is preferred. JKTech would stage crush the sample to minus 3.35 mm as required for the Bond Ball Mill Work Index test feed.

Chat Online### On the assessment of ore grindability and bond work index

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