Two-stage grinding load and product particle size control

October 31, 2021

The two-stage grinding process of the rod mill-gravel mill-hydrocyclone is shown in Figure 1. The first section is an open rod mill, and the second section is a gravel mill and a hydrocyclone closed circuit. The ore supply, ore size and hardness of the rod mill and the ore concentration of the rod mill have a great influence on the ore size of the mill. The final product particle size is primarily controlled by the slurry concentration and flow rate of the cyclone feed. The load of the gravel mill has a unimodal characteristic relationship with the transmission power of the gravel mill.

Figure 1 Two-stage grinding flow chart
The main measurement parameters of the grinding circuit: P1—gravel mill power, F2—rod mill feeding amount, F3—rod mill water supply, F4—sand pump pool water supply, L5—sand pump pool level, D6— Applicator feed concentration, F7 - cyclone 澉 water supply, L5 - sand pump 澉 liquid level, D6 - flow device feed concentration, F7 - cyclone feed ore slurry volume flow, Z8 - cyclone overflow Flow product granularity. The controllable parameters are the amount of rod grinding and the amount of water, the amount of gravel added and the amount of water supplied by the sand pump pool.
The main control objective of the two-stage grinding system is to separate the useful minerals in the ore from the maximum amount of ore and the size of the stabilized product without excessive pulverization. In order to achieve this control goal, the system controls the load of the gravel mill, the ore control of the rod mill, the control of the water supply, the control of the sand pump, the slurry level, the concentration of the cyclone feed and the size of the overflow product. Control, as well as automatic adjustment of the grinding load and product size control of the ore dosing value.

Semi Precious Stone

HR STONE mined two kinds of semi precious stones: blue sodalite and tiger eye. Specially sodalite mineral quarry in Africa, The sodalite rock in Africa that also contains abundant blue sodalite and white nepheline. Both of these minerals have a hardness of approximately 6 on the Mohs hardness scale.The quarry start to yield two kinds of sodalite Blue blocks, big size blocks, small size blocks in 2018. Max size of big block can be about 250*180cm and weight about 15-20 ton per block. Small block has two sizes: 3-10cm 10-30cm . Annual yield of blocks is about 100containers.Blue sodalite has two kinds of color classifications, one is blue mainly, one is blue and white mixed.According to the color purity and texture, the blocks have different ranks for your reference.

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sodalite vs lapis :Blue sodalite has a strong resemblance to Lapis. For metaphysical purposes, this stone is said to improve one's Logical thinking.

Sodalite was originally discovered in Greenland in the early 1800's, then about 100 years later it was next found in Ontario. A few other sources, mostly in Africa, exist today.

We also have other semi precious stones wholesale, such as Tiger eye rough-super yellow color and commercial rank for your choice. Tiger eye only has small blocks.

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