Gold Ball Mill Suspension Reservoir

The apex fraction from the hydrocyclone 52, the shale fraction, is first passed across a draining screen 58 and subsequently across a washing screen 59 having sprayers 60, receiving clarified liquid through the pipeline 42, and sprayers 61 which are fed with water, arranged thereover. The shale is carried off at e and the dilutedsuspension which is collected under the screen 59 is supplied to the magnetic separator 12 through a pipeline 62. The undiluted separating suspension collected under the screens 53 and 58 is fed to a suspension reservoir 64 along a pipeline 63. The reservoir also receives the thickened suspension from the thickener 21 through a pipeline 65, pump 66 and valve 67. From the suspension reservoir 64,gold ball mill the suspension is fed to the mixing tank 5 through a pump 68 and a pipeline 50. Disposed in the mixing tank 5 is an overflow compartment 69 having an opening provided in the bottom thereof. Part of the separating suspension enters the mixing tank 5 through this compartment 69. The total amount of suspension supplied through the pipeline 50 is larger than can be dealt with by the hydrocyclone 52, so that part of the suspension fed into the compartment 69 will flow into the pipeline 70. In this manner, the liquid level in the mixing tank 5 can be kept constant without particles from the mixture getting into the overflow. The overflow from the compartment 69 returns partly to the suspension reservoir 64 through a flow dividing box 71 and a valve 72, and partly to the mixer through the flow dividing box 71 and a pipeline 73. Through a pipeline 74 having a magnetizing coil 75, fresh magnetite is supplied to the thickener 21. The overflow from the thickener 21 is discharged at f.

Usually the overflow fraction 1 is subjected to a further treatment. This is desirable because the overflow consists of a strongly diluted suspension of very fine coal and shale particles which may also contain a small amount of fine magnetite. The fraction 7 may...