Smashing grinding system and method

Abstract

The invention discloses a smashing grinding system and method. The system comprises a rough smashing unit, a medium fine smashing unit, an ore pregrinding unit and an ore grinding unit, wherein the rough smashing unit comprises a raw material bin, a first material feeder, a rough smashing crusher, a rough smashing ore bin, a second material feeder and a first vibrating screen which are connected in sequence; the medium fine smashing unit comprises a medium smashing front buffer bin, a third material feeder, a medium smashing crusher, a medium fine smashing ore bin, a fourth material feeder, asecond vibrating screen, a fine smashing front buffer bin, a fifth material feeder and a fine smashing crusher which are connected in sequence, and the fine smashing crusher is connected with the medium fine smashing ore bin; the ore pregrinding unit comprises a fine ore bin, a sixth material feeder, a cramming material feeding hopper, a high-pressure roller grinding machine, an ore pregrinding product buffer hopper and a third vibrating screen which are connected in sequence, the fine ore bin is connected with below-screen material outlets of the first vibrating screen and the second vibrating screen, and an above-screen material outlet of the third vibrating screen is connected with the cramming material feeding hopper; and the ore grinding unit comprises a ball grinding machine, a pumppool, a slurry pump and a swirler which are connected in sequence, and the ball grinding machine is connected with the below-screen material outlet of the third vibrating screen.

Description

technical field [0001] The invention belongs to the field of mineral processing, in particular, the invention relates to a grinding system and method. Background technique [0002] At present, in the field of mineral processing, the more common crushing and grinding processes are mainly divided into two categories, semi-autogenous grinding process and conventional crushing and grinding process. Among them, the semi-autogenous grinding process is mainly represented by the coarse crushing plus SAB / SABC process; the conventional grinding process is mainly represented by the (three / two) stage (one / two) closed-circuit process. [0003] In recent years, with the rise of high-pressure roller mill equipment, the crushing process with high-pressure roller mill as the core equipment has developed rapidly. There are mainly three-stage crushing process with high-pressure roller mill as fine crushing equipment (mostly open circuit or semi-closed circuit) and four-stage crushing process ...

AI Technical Summary

Problems solved by technology

[0005] One is the current particle size of the final crushed ore product P 80 Both are about 7mm, which does not give full play to the capabilities of the equipment to maximize energy saving;

[0006] Second, there are problems such as edge effect, closed-circuit screening, ore storage and blockage, especially for materials with mud and water, poor adaptability

The open-circuit crushing of the high-pressure roller mill will have edge effects, which will affect the product particle size of the final grinding material

Closed-circuit crushing has problems such as breaking up, blockage, and low screening efficiency, and dry screening also has problems such as large amount of dust and unfavorable powder ore storage.

This is also the reason why closed-circuit operation of high pressure roller mills is rarely used in current production practice

In the semi-closed circuit process, although the larger particles with poor crushing effect at the end of the roller surface can be returned to the high-pressure roller mill for re-crushing, the edge effect can be reduced to a certain extent, but there is still a gap between the crushing effect and the closed circuit, and it cannot be realized. Full "more crushing and less grinding"

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