Crushing system for iron mine underground mill and crushing process

Abstract

The invention relates to a crushing system for an iron mine underground mill and a crushing process. The crushing system for the iron mine underground mill is characterized in that the crushing system is mainly composed of a coarse crushing plant, a medium crushing plant, a screening plant, a fine crushing plant and an overhaul system; and the coarse crushing plant, the medium crushing plant, the screening plant and the fine crushing plant are arranged in a stair-step mode from top to bottom in the vertical direction of a mining factory travelling roadway according to the operation sequence. The crushing process includes the steps that after mined lump ore with the particle size being 600mm-1000mm is crushed by a coarse crushing machine, a medium crushing machine and a fine crushing machine, the ore grain size is turned to be 20mm-30mm; and then the undersize product of a vibrating screen is fed into roughing flotation operation of a grinding flotation system through a pump. The crushing system is low in energy consumption, no earth surface land is occupied, environmental protection is achieved, and qualified raw materials can be provided for the subsequent grinding flotation system.

Description

technical field [0001] The invention belongs to the field of magnetite beneficiation technology, and in particular relates to a crushing system and a crushing process of an underground iron ore beneficiation plant. Background technique [0002] The iron ore concentrator is a factory that enriches the beneficial metal iron by crushing, grinding, and selecting the iron ore mined underground. The current magnetite dressing plant is built on the surface, and the dressing plant itself will occupy part of the surface land. If the tailings and waste rocks of the dressing are not handled properly, they will easily cause environmental pollution, and the accumulation of these dressing wastes will also occupy a large amount of land. The land is barely reusable. The mineral processing plant is built on the surface, and the tailings and waste rocks of the mineral processing are also accumulated on the surface, which will lead to a large area of ​​goaf underground, which is prone to subs...

AI Technical Summary

Problems solved by technology

The current surface ore concentrator needs to lift the ore to the surface first, and then fill the underground goaf with the tailings and waste rock after selection. The process is complicated and the energy consumption is high.

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