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    Principle A ball mill works on the principle of impact and attrition: size reduction is done by impact as the balls drop from near the top of the shell. Construction A ball mill consists of a hollow cylindrical shell rotating about its axis. The axis of the shell may be either .

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    The IsaMill usually consists of a series of eight disks mounted on a rotating shaft inside a cylindrical shell (see Figure 2). The mill is 7080% filled with the grinding medium, and is operated under a pressure of 100 to 200 kilopascals. The disks contain slots to allow .

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    Modified Sluice Pinched sluice is a modified sluice that has been used for many years ago. In its elementary form, the equipment is inclined trough 2 feet long, narrowing from about nine inches in width at the feed end to one inch at discharge. Basically, feed .

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    Sizing is the general term for separation of particles according to their size. The simplest sizing process is screening, or passing the particles to be sized through a screen or number of screens. Screening equipment can include grizzlies, bar screens,wedge wire .

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    A gold dredge is a placer mining machine that extracts gold from sand, gravel, and dirt using water and mechanical methods. The original gold dredges were large, multi-story machines built in the first half of the 1900s. Small suction machines are currently marketed .

  • Mechanical screening - Wikipedia, the free encyclopedia

    An improvement on vibration, vibratory, and linear screeners, a tumbler screener uses elliptical action which aids in screening of even very fine material. As like panning for gold, the fine particles tend to stay towards the center and the larger go to the outside. It .

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    Lead The primary lead production process consists of four steps: sintering, smelting, drossing and pyrometallurgical refining. To begin, a feedstock comprising mainly of lead concentrate in the form of lead sulphide is fed into a sintering machine. Other raw materials .

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