Method for recycling single quartz and feldspar from gold flotation tailings

Abstract

The invention relates to a method for recycling single quartz and feldspar from gold flotation tailings. Harmful slurry and part of iron impurities are removed through a settlement desliming method; sodium carbonate is adopted as regulators and plays a role in restricting flotation of the quartz and the feldspar, YOA is adopted as a collecting agent and removes carbonate mineral impurities in the tailings more obviously, and meanwhile part of iron impurities are removed; the removal rate of iron and other impurities is increased obviously by increasing the number of times of operations of flotation and impurity removal, and the grade of aluminum oxide and silicon oxide is greatly improved; sulfuric acid, hydrofluoric acid and lauryl amine are combined, so that the feldspar is activated sufficiently, the amount of the hydrofluoric acid is reduced, and the cost for dealing with environmental pollution and beneficiation wastewater is reduced. The quartz and the feldspar are dissociated sufficiently, the recovery rate of the feldspar is 47.01%, the recovery rate of the quartz is 22.54%, and the index reaches the quality standard of second-grade ceramic raw materials or the third-grade glass standard.

Description

technical field [0001] The invention belongs to the technical field of tailings treatment, in particular to a method for recovering single quartz and feldspar from gold flotation tailings. Background technique [0002] Gold mines in Zhaoyuan, Shandong Province discharge about 6 million tons of tailings every year. When the climate is relatively dry, the pollution of tailings dust to the environment is very serious. In order to solve the impact and harm of flotation tailings on the environment, measures such as tailings reservoir reconstruction, tailings filling, and clay brick production are mainly taken to alleviate the impact of mineral processing tailings on the environment. However, the gold flotation tailings contain a larger composition of valuable minerals that can be recycled, and its composition is shown in Table 1. [0003] Table 1 [0004] [0005] It can be seen from Table 1 that the total content of quartz minerals and feldspar minerals in gold flotation t...

AI Technical Summary

Problems solved by technology

It can be seen that the direct flotation of such materials with relatively coarse particle size composition, on the one hand, coarse particles are difficult to flotation, which will affect the quality and recovery of flotation products; on the other hand, under the condition of coarse particle size, It is difficult to dissociate between quartz and feldspar, which will also affect the flotation index

[0011] 2. The weathering of feldspar in the tailings is serious. During the grinding process, part of the feldspar will also form "secondary slime", which will cause the loss of feldspar in the process of desliming and impurity removal

[0012] 3. Tailings contain a certain amount of carbonate, iron minerals and other sundries, which will increase the difficulty of separating and extracting quartz and feldspar

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