Test on Wet Preconcentration Process before Grinding of an Iron Mine in Hebei
The dry tail throwing of magnetic pulley of an iron ore crushing product in Hebei has high water content,high proportion of fine particles,and high magnetic iron content of tail throwing waste rock,which has the risk of metal loss.In order to reduce the metal loss and improve the efficiency of the grinding system,the wet pre-selection test of the crushing product before grinding is carried out,and the influence of the wet pre-selection magnetic field strength and the rising impact water pressure on the selection effect of the wet pre-selection machine is studied.The test results show that the wet preconcentration of the raw ore is carried out under the conditions of magnetic field strength of 318.47 kA/m and replenishing water pressure of 0.12 MPa.The waste rock with yield of 23.72%and total iron grade of 8.53%can be thrown out.The re-covery rate of magnetic iron is 98.36%,and the grade of raw ore into the grinding is increased from 26.09%to 31.55%,which is increased by 5.46 percentage points.Good economic and social benefits have been achieved.
iron orewet preconcentrationmagnetic field strengthcost reduction and efficiency in-crease
万方数据
维普
