Movement of the medium in the specific gravity or particle size mineral particles selected from the group of sub-process dressing heavier force method. The basic form of movement of the ore particles is to settle in the medium.
When the ore particles settle in the medium, they are subject to two forces; one is the gravity of the ore particles in the medium, and the gravity of a certain ore is certain in a certain medium; the other is the resistance of the medium, the resistance It is related to the sedimentation velocity of the ore particles. In the initial stage of the sedimentation of the ore particles, due to the small resistance of the medium, the ore particles undergo acceleration settlement under the action of gravity. As the settling velocity increases, the resistance of the medium also increases. As the resistance of the medium increases gradually, the sedimentation acceleration of the ore particles gradually decreases. After a certain time, the acceleration is reduced to zero. At this point, the ore particles settle at a certain speed, and this speed is called the final velocity of sedimentation. The final velocity of sedimentation is affected by several important factors, including: specific gravity, particle size and shape of the ore; specific gravity and viscosity of the medium.
236. Why do the ore must be fully broken and ground before re-election?
In order to separate the particles as much as possible by gravity, the ore must be sufficiently crushed and ground prior to re-election to dissociate the useful mineral from the gangue mineral and reduce the large particle size entering the re-election process. The ore particles must be sieved and graded to separate the ore pellets into various grades for separate re-election machines and should be separated from particles (or slime) that cannot be re-selected. Because the narrower the grain size during re-election, the more the particle size can be reduced, the more accurate the mineral particles can be selected according to the specific gravity, and the productivity of the re-election machinery can be improved, and the mud of the useful minerals in the selection process can be reduced.
2 , re-election method according to the principle of action is divided into several selection methods?
According to the different working principles, it can be divided into: hydraulic or wind grading, washing, heavy medium dressing, jigging beneficiation, chute beneficiation, shaker beneficiation.
Regardless of the method, it is particularly suitable for the treatment of coarse materials with a certain difference in specific gravity, and the efficiency of the selection of fine particles is generally low.
Stainless steel pipe or thin-walled parts, the cutting is light, the vibration is small, the chips are brittle, and the workpiece is not deformed. High-speed milling with carbide milling of stainless steel with indexable which have achieved good results. When CNC Milling stainless steel, the cutting edge must be sharp and bear the impact, and the chip pocket should be large.
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