how ball mill ore feed size affects tonnage capacity. the important of crushing your ore and rock fine and properly is often forgotten the finer you crush the higher your ball mill tonnage and capacity will be the effect of ball mill feed size and how it affects circuit throughput can be hard to estimate here we described a method of designing a crushing plant using power drawn and power rate 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 If the breakage characteristics of a material remain constant over all size ranges, the calcul ated work
how to caculate ball mill capacity. Do you need a quick estimation of a ball mills capacity or a simple method to estimate how much can a ball mill of a given size diameterlenght grind for tonnage a product size use these tables to get you close no bwi bond work index required here but be aware it is only a crude approximation for most soft ores from cm to um ball mill design power examplehowever, the total mill power consumption dropped from an average of 7600 kW to 7000 kw. the mill work index dropped percent from an average of 5.5 kw-hrt to 5.0 kw-hrt. conclusions this represents a current view of the effects of grinding ball fragments in the milling circuit and the impact on the crushing and grinding circuit.
boddington has a design capacity of tpa and processes two very hard gold ores with average bond ball mill work indices of 15.1 and 16.6 kwht, bond rod mill work indices of 22.8 and 24.2 kwht, and JK axb values of 27.9 and 25.5. the circuit is comprisedapr 13, 2013 gulin machine in iron ore processing plant, ball mill bond work index for limestone. gulin provide the ball mill bond work index for limestone solution case for you.
may 20, 2013 mill speed, solids and ball charge are parameters that affect ball mill grind and tonnage. wet ball mill how It works crusher mills, cone crusher, jaw xbm-ball mills:ball mill,roller mill,ball end mill,ball feb 10, 2014 hmmm so it means say the stowage factor is 0.40 cubic mtr per tonne stow factor being the volume of space per ton and the net tonnage is 48,018. hence dividing the net tonnage by 0.40 we get tons which is the cargo carrying capacity of this capesize bulk carrier jee tht was easy thnks
this sizing used a ball mill work index of 10.0 kwht based on 200,000 tonne capacity sag mill. svedala krupp MW drive. material in the sag mill. feed tonnage and the feed water ratio how to calculate ball mill rpm with formula, how to calculate ball mill rpm ball mill critical speed calculation,ball grinding machine determine the spindle speed and feed rate for a milling operation, as well as the cut time for a given cut length.formula to calculate filling of ball mill.
sagdesign testing provides sag pinion energy grindability in kwht to within from 152 to 1.7 mm, and bond ball mill work index on sag ground ore, from the sag test on the same sample. starkey & associates uses the patented sagdesign technology to calculate accurate mill sizes from measurements on a clients own ore samples.ball mill throughput data gulin machinerypopular for ball mill throughput data now knowing the all the bond work wi read more cement mill throughput calculation
ball mills usually operate at 65% to 75% of the critical speed. the critical speed is calculated as under 2.1.3 work index: work index is defined as the gross energy required in kilowatt-hours per ton of feed needed to reduce a very large feed to such a size that 80% of the undersize passes through 100- screenmill size dia mm egl mm 7,600 11,960 tbc by suppliers drive kW 14,000 tbc by suppliers bond work index ball mill kwht 16.0 testworkengineering design average tonnage rate th 1441 calculations max. tonnage rate mtph 1729 calengineering design solidspulp density engineering design feed size, 2,000
characterized as sodium feldspar. the hardgrove grindability test used a ball-race test mill. the hardgrove grindability indices of these feldspar samples had an average of 46.25. knowing the average hardgrove index, a calculated work index of 12.88 kwstph very large tonnages can be ground with these ball mills because they are very effective material handling devices. ball mills are rated by power rather than capacity. today, the largest ball mill in operation is 8.53 diameter and 13.41 long with a corresponding motor power of MW
tonnage while respecting the ability and limitations of the downstream ball mill classification circuit to produce the desired coarser final product size. secondary grinding: ball mill classification circuit optimization In conventional ball milling, the so called comminution laws, and in particular bonds law,the basic parameters used in ball mill design 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 and maximum chunk size, product size as and
the concept of always pushing a sag mill to its full capacity is the result of sag mills being undersized. when a sag mill is designed to run at steady tonnage, only then can maximum recovery be achieved. the value to the project will justify the cost extra that is required to achieve this performance.the speed of ball mill varies between rpm. As the product size becomes fine, the capacity of a mill reduces, the energy requirement increases. theory: ball mill consists of a cylindrical shell slowly turning about a horizontal axis and filled with solid grinding medium In ball mill, most
rod mills are particularly useful, if you run a low tonnage operation and are looking for coarse product. our rod mills are available in multiple diameters to fit the needs of your operation. grinding, primarily by attrition, rod mills require comparatively low levels of power to operate.the values of modified bond ball mill work index for the product of agsag mill varied from 18.68 to 23.04 kwht. the highest ore hardness in the process of ball mill grinding is noted for sample no.1, the lowest for sample no.4. also it is important to note, that the value of
mar 09, 2016 professional experience years month andrey sysoev has years and month professional experience. discussions andrey sysoev acceded to discussions, publications andrey sysoev sysoev released publications. know-how bucket elevator andrey sysoev used this tag times, chain bucket elevator andrey sysoev used this tag times, screw type conveyor dec 12, 2016 the basic parameters used in ball mill design rod mill or any tumbling mill sizing are; material to be ground, characteristics, bond work index, bulk density, specific
the basic parameters used in ball mill design 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 and maximum chunk size, product size as and maximum and finally the type of circuit openclosed modelling the specific grinding energy and ball mill scale-up tonnage rate the total mill power draw is calculated and then model, for the determination of the mill power draw, in which the bond work index is also embodied. the proposed models are then used for ball-mill
circuit tonnage specific energy input Wi bond work index wibm bond ball mill test work index wic bond impact crushing test work index wioact actual operating bond work index determined from measurements on the circuit ball mill consumed power 7568 7794 7668 input wet feed tonnage to the sag mill 726.3 791.4 754.6 wet reject tonnage 98.3 128.9 117.9 pressure of the initial cyclone cluster 62.88 90.80 83.43 pressure of the sag mill free trunnion 4962 5169 5036 moreover, the sample prepared from the feeding
ball mill capacity calculations. We have ball mill capacity calculations,do you need a quick estimation of a ball mills capacity or a simple method to estimate how much can a ball mill of a given size diameterlenght grind for tonnage a product size use these tables to get you close no bwi bond work index required here but be aware it is only a crude approximation for most soft ores from the ball mill work index laboratory test is conducted by grinding an ore sample prepared to 100% passing 3.36 mm to product size in the range of thus determining the ball mill work index the work index calculations across a narrow size range are conducted using the appropriate laboratory work index determination for the material size of interest, or by
sizes typically reached by conventional ball milling. the delineating size between coarse and fine grinding is 750 smc test results are used to determine the drop weight index and the coarse ore grinding index test data from the bond ball mill work index test is used to calculate the fine grinding index the ia and