Industrial Experimental Research on Increasing Concentration of Grinding Products in a Concentrator in Hunan
As for the thickener designed for the new concentrator of a multi-metal mine in Hunan,aiming at the problems of covering a large area,high cost and long period of time for construction,efforts were made to increase the concentration of products from classification for reducing thickener area or even cancelling thickening operation,so as to actualize a simple,efficient and low energy-consuming pre-treatment of feed ore.For this purpose,experiments were carried out to determine parameters,such as hydrocyclone replenishment water,cone angle,cylinder height and apex diameter.It is found that by using a hydrocyclone consisting of a long cylinder and a short cone with cone angle of 90°,cylinder height of 800 mm and apex diameter of 50 mm,the overflow concentration can be increased from 34%to more than 44%,with the classification efficiency up by 0.77 percentage points,and the content of-74 μm size range is stabilized at more than 70%.Therewith,the content of easy-to-separate range increases by 2.19 percentage points and the WO3 distribution increases by 9.87 percentage points.Furthermore,the grade and recovery of tungsten,molybdenum and bismuth all become stabilized in the follow-up flotation operations.
NETL
NSTL
万方数据
