of ball mill feed sample from plant survey. Sample is reconstituted with water to be the same percent solids as the plant ball mill discharge. Mill speed: 35.2 rpm Length of time of test: 363 seconds Average torque reading: 1,056 in lbs Mill HP = x = 0.590 HP
21/1/2004· The city councils waste contractor, Biffa will operate the new recycling plant under its £300 million 25 year waste management contract which started in April 2003 .. The new plant will process unsorted household waste for composting and recycling by using a ball mill.
Generally, filling the mill by balls must not exceed 30%35% of its volume. The productivity of ball mills depends on the drum diameter and the relation of drum diameter and length. The optimum ratio between length L and diameter D, L: D, is usually accepted in the range 1.561.64.
In dry cement ball mills, there are studies done in the past which clearly shows that energy saving make sense reducing 1°chamber ball mill filling degree. This thread shore level is considered between 20 and 21%. Below that level mill production/consumption curve do not make more sense increasing the specific energy consumption instead of lower it.
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product fineness to applythe ball mill circuit P80 should be no less than approximately 70 µm . This Bond Efficiency determination should not be applied to cir cuits with a P80 finer than approximately 70 µm without making qualifications. 3. Calculate the circuit Wi Efficiency Ratio : WiSTD Wi Efficiency Ratio = WioACT
Magotteaux can use all this information to help you improve your milling efficiency and build up your business. The factors affecting milling efficiency are ball size, type and density, the grinding circuit parameters, mill internals such as the liner profile, etcetera, the mill operating parameters .
To help you get the most of your business, we have designed our ball mills with long term operation in mind with a minimum need for maintenance. Efficient operation through automatization Outotec process engineers welcome the opportunity to assist you with circuit and circuit control design as well as start up, operation, and optimization of the milling plant.
power consumption figures involving ball mills, a small increase in efficiency in the grinding processes may have a large impact on the operating costs of the plant 12, as well as on the conservation and optimization of energy resources. 2. Ball mills fill level monitoring. One of the greatest research efforts in improving the efficiency of ...
The ball mill has higher circulation load, it generates only 30 35% of actual fines you require to be called as product. If your product size needed is 100% passing 45 micron, then the ball mill total discharge material will contain normally 30% of 45 micron. The rest is oversize which has to be ground again.