Crushing-screening-washing process of mixed hematite ore on high mud and high water surface

Abstract

The invention relates to a crushing, screening and washing process of high-mud and high-water surface mixed hematite. The crushing, screening and washing process comprises the steps of performing three crushing processes including coarse crushing, intermediate crushing and fine crushing on mixed hematite of which the iron grade is 30% to 35%, the slime content is 20% to 40% and the granularity is0 to 750 mm in a raw ore stock bin, wherein in the coarse crushing process, a roller type screening machine and a double-geared roller crusher are adopted to screen to deslime and crush, and then a rotary drum washer and a drum screen are adopted to wash to deslime and perform dry and wet separation; in the intermediate crushing process, an intermediate crushing cone crusher and a dry double-layervibrating screen closed loop are adopted to treat oversize products of the drum screen, and undersize products of the drum screen are treated by a two-stage wet single-layer vibrating screen, a cyclone unit and a dewatering screen so as to obtain selected pulp; and in the fine crushing process, a fine cone crusher and a linear vibrating screen are adopted to obtain feed raw materials. According to the crushing, screening and washing process, the problems of adhesion and blockage of minerals are effectively solved, and the energy consumption is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of iron ore beneficiation, in particular to a crushing-screening-ore-washing process of mixed hematite on the surface of high mud and high water. Background technique [0002] Hematite is widely distributed, and surface ores are more thoroughly oxidized due to long-term contact with oxygen. Most of them are hematite, including hematite, false hematite, limonite and goethite. Most of the hematite on the surface has been weathered and eroded for a long time, is relatively soft, and has a large proportion of ore slime, generally up to 20% to 40%. Because the minerals are located on the surface, during the rainy season, the rainwater will penetrate the surface ore layer, and part of the rainwater will be absorbed by the mud, resulting in a high water content of the minerals, generally up to about 15%. Mud, high water, high viscosity characteristics. At present, gyratory crushers and jaw crushers are mostly use...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a crushing-screening-washing process of high mud and high water surface mixed hematite that can effectively solve the problem of mineral adhesion and blockage, and can save energy

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