Appli ion of Operating Work Indices in Autogenous
AG/SAG Wio AWio kWh/t 28.5 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
Bond equation of cement ball mill sizing
E = specific energy in kWh/t. WI = work index in kWh/t. C = correction factor. P80 = sieve which has 80% of passing in the product. F80 = sieve which has 80% of passing in the feed. Efficiency correction factors are giving by the following equation:
Ball Mill Work Index Calculation Xls
These can be related to the W is the work index measured in a laboratory ball mill kilowatt-hours per metric or short ton P 80 is the mill circuit product size in micrometers; F 80 is the mill circuit feed size in micrometers. Rod mill. A rotating drum causes friction and attrition
Orway Mineral Consultants Canada Ltd. Mississauga ON. L4W
W = Specific energy kWh/t Wi = Work Index kWh/t P = 80% passing size for the product P 80 F = 80% passing size for the feed F 80 Bond’s approach consists of determining the ore hardness characteristics or Work Index Wi via standardized laboratory testwork. The full suite of Bond comminution tests provide the Ball Mill Work
QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE VALUE DETERMINATION
others in Allis-Chalmers have developed a grinding test in a ball mill in a closed cycle until the establishment of stable recirculating load Maxson et al. 1933 . The Bond work index is a parameter which represents a measure of an ore resistance to grinding. Numerically the work index represents the energy kWh/sht
ball mill for measuring grinding work index
ball mill work index was averaging only 11.6 kWh/t which is not hard. A rod mill work index ﬁ gure was not found but was thought to be in the 16 kWh/t to 18 kWh/t range. The Xstrata Zinc 22 ft ID 40 ft EGL over ow ball mill ﬂ was installed at Mt Isa in 2009.
GMSG GUIDELINE: DETERMINING THE BOND EFFICIENCY OF INDUSTRIAL
Bond Test WI’s kWh/t : Rod Mill: Ball Mill: 9.5 kWh/t.8 9 kWh/t . Bond Standard Circuit Work Index: Assume the rod mill Work Index of 9.5 applies from the actual rod mill feed sizeof 19300 mµ although some of this work might ideally be done by crushers to achieve a rod mill F80 of 16000 m to a rod µ
How to Size a Grinding Ball -Top Size Calculation
Calculate What Ball Size D b the top size of the grinding media mm C 200 for ball mills and 300 for rod mills Work index kWh/sht: V Cr percentage of the
PDF A quick method for bond work index approximate value
Numerically the work index represents the energy kWh/sht This study aims to develop a new approach toward estimating the Bond ball mill work index BBWI by applying a series of kinetic
Testwork: Bond ball mill work index - SAGMILLING.COM
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 & 39;locked-cycle& 39; test where ground product is removed from test cycles and replaced by fresh feed.
A Method of C alculating Autogenous/ Semi-Autogenous Grinding
ball mill work index was averaging only 11.6 kWh/t which is not hard. A rod mill work index ﬁ gure was not found but was thought to be in the 16 kWh/t to 18 kWh/t range. The Xstrata Zinc 22 ft ID × 40 ft EGL over ow ball mill ﬂ was installed at Mt Isa in 2009. This mill was put into single
Index Bond Ball Mill
The bonds 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 m.If the breakage characteristics of a material remain constant over all size ranges the calcul ated work.
Bond Tests Mining SGS
Bond Rod Mill Grindability Test. The test determines the Bond Rod Mill Work Index which is used with Bond’s Third Theory of Comminution to calculate net power requirements when sizing ball mills*. Various correction factors may have to be applied. The test is a closed-circuit dry grindability test performed in a standard rod mill.
IS THERE A MATERIAL CONSTANT WHICH CHARACTERISES MINERAL
i is Bond Work Index in kWh/t; P is square sieve opening passing 80 % of the product in µm; and F is square sieve opening passing 80 % of the feed in µm. According to the definition of F.C. Bond the Work Index represents the energy which is required to grind one short ton of ore 1 sht = 90718 kg of unlimited large sizes F = f
modifi ion of ball mill for efficient
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. Product inquiry
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ball mill work inde kwh sht