Short-process new technology for efficiently sorting micro-fine particle tin ores by applying centrifugal machine

Abstract

The invention relates to a short-process new technology for efficiently sorting micro-fine particle tin minerals from copper flotation tailings by applying a centrifugal machine. after concentrating and removing most of water from the copper flotation tailings, one-coarse, three-scavenging and four-cleaner-flotation are carried out to recover tin minerals and obtain tin middling, and meanwhile, most ultra-low-grade tailings are abandoned. The tin middling is carried out one-coarse and one-scavenging of the centrifugal machine, a qualified tin concentrate is obtained, and the tailings of the tin concentrate are high in tin grade and exist in a coenobium mode and low in solid concentration; and the tailings are firstly concentrated and dehydrated and then stirred and milled after the suitable concentration, and thus the tin minerals are further dissociated. A great number of secondary slurry is generated by stirring mill, firstly, centrifugal machine desliming treatment is carried out tocontrol the tin grade of the tailings at 0.08% or below, then centrifugal machine cleaner flotation is carried out, the concentrate is high in tin grade, a final tin concentrate is obtained by combining with the tin concentrate obtained by the previous centrifugal machine with one-coarse and one-scavenging, the tailings are combined with the tin tailings from the previous centrifugal machine withone-coarse and one-scavenging, the process is returned for re-concentration and stirring mill treatment, and the tin recovery rate is increased.

Description

technical field [0001] The invention relates to a new short-process ore dressing process for efficiently sorting fine-grained tin minerals from floating copper tailings by using a centrifuge, which can be applied to the beneficiation fields of (micro) fine-grained non-ferrous metal ore and rare metal ore. Background technique [0002] Tin is brittle, brittle and muddy, so it is easy to cause over-crushing during the crushing and grinding process, resulting in a large amount of fine-grained tin ore (commonly known as tin slime). For -0.038mm particle grade tin ore, the recovery rate of tin is low by using traditional gravity separation methods such as shaking tables. According to statistics, in the process of tin beneficiation in my country, 80% of the loss of tin metal comes from tin sludge, and one-third of the tin ore resources in the world are lost with fine sludge. Therefore, the effective recovery of tin ore slime is a technical problem at home and abroad [0003] The...

AI Technical Summary

Problems solved by technology

If the traditional gravity separation process such as shaking table separation is adopted, it is difficult to recover such fine-grained tin ore, and the processing capacity is small, the economic benefit is not obvious, and it is difficult to popularize and apply; if the flotation process is adopted, the fine mud will affect the flotation process The impact of interference is serious, the effect is not ideal, and the consumption of chemicals is large, and the discharge of BOD and COD in tailings water exceeds the standard

So far, there is still a lack of an effective beneficiation process that can efficiently separate low-grade tin fines

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