News Date:2015-09-14
Ball mill and rod mill are widely used in ore dressing plant, and grid type and overflow type are the most widely used among ball mill. Below are the difference between ball mill and rod mill.
Generally speaking, rod mill has process features of well distributed, less coarse particle and slurry, for ball mill, there are poor selective crush and distribution.
According to crush features of rod mill, the range of application:
(1) Gravity concentration plant or magnetic ore dressing plant for tungsten tin ore and other rare metal usually adopts low crush of rod mill during coarse grinding stage to prevent regrind.
(2) In certain condition, brachycephalism cone crusher could be replaced by rod mill to reach fine crushing. To adopt brachycephalism cone crusher deal with soft ore, especially much mud content, it not only brings much dust but also causes fine crusher blockage.
(3) When rod mill used for coarse grinding, product granularity is 0.3-1mm, its production capacity is more than the same specification of ball mill, when it used for fine grinding, its production capacity is less than the same specification of ball mill.
Compared with rod mill, ball mill is poor in selective crush, but it can be widely used for all kinds of ore, ball mill can be adopted, no matter raw material what is. Below is application range of grid type and overflow type ball mill.
Grid ball mill is mandatory with low level to discharge ore, and ore particles ground finely can be discharged timely due to less ore pulp stored in mill. Hence, it’s not easy to concentratein mill for mineral with large density, and over-crushing type is lighter than overflow type, it causes the speed of grinding more faster. Meanwhile, this mill can insert more balls because of blocking by fence.When steel balls in mill falling down, it causes light strike due to resistance of ore pulp. To sum up, the production ratio of grid ball mill is higher than overflow ball mill by 10%-25%.
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