Process method and equipment for efficient crushing and grinding of crystalline graphite with large scales

Abstract

A process and equipment for efficient crushing and grinding of crystalline graphite with large scales protected. The process of the present invention includes: the primary crushing jaw crusher and the secondary crushing cone crusher are fed into the circular vibrating screen, the material on the screen is returned to the cone crusher to form a closed circuit system, the material under the screen is transported to the front buffer bin of the high-pressure roller mill, and the high-pressure The ultra-fine crushed product of the roller mill is fed into the pulp tank and then fed into the linear vibrating screen. The material on the screen is returned to the buffer bin in front of the high-pressure roller mill to form a closed-circuit system; the material under the screen enters the flotation operation. The "three-stage two closed-circuit" crushing and grinding process is composed of jaw crusher, cone crusher, high-pressure roller mill, circular vibrating screen and linear vibrating screen, and the ultra-fine crushing of high-pressure roller mill replaces the traditional ball mill grinding process to protect ore Original large scales, and shorten the grinding process to achieve efficient grinding. The fineness of the final floating material can be controlled between -0.147mm particle size accounting for 40%-65%.

Description

Technical field: [0001] The invention relates to a process method and equipment for efficient crushing and grinding of crystalline graphite for protecting large scales. Background technique: [0002] Crystalline graphite, also known as flake graphite, is recognized as the most valuable graphite resource. Its raw materials and deep-processed products have excellent properties such as high temperature resistance, electrical and thermal conductivity, lubricity, and easy processing and molding. They are widely used in metallurgy, machinery, and chemical industry. and aviation and other important fields. [0003] Crystalline graphite has good floatability, high-grade concentrate products can be obtained by flotation, and the larger the scale size of the concentrate product, the greater its market and industrial application value. Like other minerals, in order to obtain qualified concentrate products, crushing-grinding is required to achieve monomer dissociation before flotation....

AI Technical Summary

Problems solved by technology

At present, graphite mines generally adopt the three-stage two-closed-circuit crushing process of "coarse crushing + medium crushing + fine crushing"; the crushed mineral material reaches the feed size of the ball mill, then grinds, and finally enters the flotation operation; the industry has formed a common three-stage two-closed circuit Crushing process + one-stage (two-stage) ball mill grinding process. Existing data show that ball mill grinding has extremely serious damage to the original large scales, mainly manifested as stepped fractures of graphite flakes; most of this kind of crushing process is long and broken The grinding efficiency is low and the energy consumption accounts for a large proportion, which is not conducive to the protection of my country's flake graphite resources and the cost reduction and efficiency increase of enterprises

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