Method and equipment for complex copper-lead-zinc sulfide ore grinding process

Abstract

The invention discloses a method and equipment for a complex copper-lead-zinc sulfide ore grinding process. The method comprises the following steps of feeding a coarse crushed material of a jaw crusher into a linear vibrating screen, feeding an oversize material into a cone crusher for crushing, merging the crushed oversize material into the coarse crushed material to form a closed-circuit system, and feeding an undersize material into a stock bin; and feeding the material in the stock bin into a micro-powder sieve, feeding the oversize material into a high-pressure roller mill for ultrafinecrushing and then returns to the micro-powder sieve for feeding to form a closed-circuit system, and the undersize material is a final crushed product. The jaw crusher, the cone crusher, the high-pressure roller mill, the linear vibrating screen and the micro-powder screen form a "three-section two-closed-circuit" process, so that the ore crushing process is enhanced, the granularity of ore grinding materials is reduced, and a final crushed product P95 can be controlled to be 1-2mm; in the first-stage ore grinding, a tower mill and a hydrocyclone are adopted to form a closed circuit; and ore is treated through the three-section two-closed-circuit "ultrafine crushing" and tower grinding combined ore grinding process, and the fineness of the finally floated material can be controlled to be -0.074 mm and is larger than or equal to 85%.

Description

Technical field: [0001] The invention relates to a method and equipment for crushing and grinding process of complex copper-lead-zinc sulfide ore. Background technique: [0002] Flotation is the most commonly used method for the purification and processing of minerals. Before the ore enters the flotation operation, it must be crushed and ground first, so that the useful minerals can be dissociated. For a long time, crushing and grinding operations have been the most important energy consumption links of mineral processing plants, which can account for 40% to 70% of the total power consumption of production. Especially grinding operations have obvious high investment, high power consumption, and low energy utilization. and other shortcomings. As mineral resources tend to be poor, miscellaneous, and fine, innovative crushing and grinding processes, matching high-efficiency and energy-saving equipment, and effectively reducing the production cost of complex and refractory ores...

AI Technical Summary

Problems solved by technology

This kind of multi-stage crushing + ball milling process is still the most widely used and most mature technology, but there are also problems such as many process links, large workshop area, noise and dust pollution, high power consumption per unit of ore, and high production costs. Disadvantages, taking the ball mill as an example, the mill liner and medium loss account for more than 90% of the total loss cost of the dressing plant

With the increasingly poor, refined and complex resources, the traditional multi-stage crushing-ball milling process can no longer meet the requirements of mining enterprises for energy saving, consumption reduction and profit improvement.

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