Method and system for treating refractory zinc middlings through machine column combined configuration

Abstract

The invention discloses a method and system for treating refractory zinc middlings through machine-column combined configuration. The method comprises the following steps: regrinding and overflowing the refractory zinc middlings, and carrying out flotation column roughing to obtain flotation column roughing ores and flotation column roughing tailings; flotation column fine separation is conducted on the flotation column rough separation ore twice, and zinc concentrate is obtained; the flotation column roughing tailings are subjected to flotation machine roughing, and flotation machine roughing tailings and flotation machine roughing tailings are obtained; performing flotation machine fine separation on the flotation machine coarse separation ore for four times to obtain zinc concentrate; and the flotation machine roughing tailings are subjected to flotation machine scavenging for three times, and flotation machine scavenging tailings are obtained. According to the method, a machine-column combined flotation method is adopted for roughing and selecting refractory zinc middling ore through a flotation column to obtain high-grade zinc concentrate, then a flotation machine is used for conducting roughing once, scavenging three times and concentration four times, micro-fine particle refractory zinc metal minerals are subjected to flotation enrichment, and refractory fine-particle-size zinc metal is recycled as much as possible; and the zinc concentrate grade and the zinc recovery rate both reach the standard and are stably improved.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a method and system for processing refractory zinc middling ore with combined configuration of machine columns, especially for the processing of zinc mineral processing with a relatively high proportion of fine-grained zinc. Background technique [0002] Separation of fine-grained zinc has always been a difficult point in beneficiation, and the treatment method is generally to adopt the process of regrinding and separation. For example, the zinc metal mineral composition of Duda lead-zinc ore is relatively simple, mainly sphalerite, and a small amount of smithsonite, but due to the uneven distribution of sphalerite in the ore, and the high occupancy rate of fine sphalerite , It is difficult to recover zinc metal with higher grade concentrate. [0003] Since zinc middlings are of fine particle size, after regrinding and dissociation, the fineness can reach over 90% of ...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and system for processing refractory zinc middling ore with a combination of machine columns, so as to solve the problem that the refractory zinc middling ore cannot recover zinc metal with higher-grade concentrates in the prior art, and zinc separation and flotation run out. high tail, poor recovery rate of zinc metal, etc.

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