A large and medium beneficiation using conventional three-stage plant should be a closed circuit crushing process. A concentrator of less than 500t/d should adopt a two-stage, one-closed process. Small and medium-sized concentrating plants using ultra-fine crushing technology should increase the over-filling operation of broken coarse crushed products in two-stage crushing. When the crushed final product is fed as a ball mill , the particle size of the conventional crushed product should be less than 15 mm, and the ultrafine crushed product can be less than 12 mm. When the rod mill is fed, the final crushed product should have a particle size of less than 20 mm.

When 2 medium crushers are fed, if the final product has a fractional content of more than 15% or contains more ore and is wet, the heavy-duty sieve should be used for enhanced screening before the crushing, and the final product is produced.

When the intensive screening measures are not effective in the three crushing systems, the washing process can be used, but it must be fully demonstrated. For ore that is difficult to determine for washing in the design, there should be a possibility of washing in the design.

Pre-selection

1 When the ore contains more waste rock, and the difference in color, density, magnetism and conductivity is large, it should be determined through trial and technical economic comparison whether pre-selection is carried out.

Washing and screening operations should be set up before 2 hand selection, light picking and heavy media sorting. For 350mm grade ore, a mechanical pre-selection process should be used.

The grade of tailings sorted by the three heavy media should be lower than or equivalent to the tailings grade of the main process.

The weight of 4 heavy media sorting shall be determined according to the actual production of the test or similar enterprise. When sorting by heavy medium cyclone, the selected particle size should be 3 ~ 15mm, and the maximum particle size should not be greater than 20mm.

When 5 heavy medium beneficiation processes are adopted, corresponding measures shall be taken to maintain the stability of the ore properties, and if necessary, ore facilities may be provided.

UNI Flanges

UNI Flanges,UNI Blind Flanges,UNI EN Flanges,Flat Faced Flange

Shandong Zhongnuo Heavy Industry Co.,Ltd. , https://www.zhongnuoflange.com