Method for recycling quartz and feldspar mixtures from gold flotation tailings

Abstract

The invention belongs to the technical field of tailing treatment and particularly relates to a method for recycling quartz and feldspar mixtures from gold flotation tailings. A sedimentation desliming method is adopted for removing harmful slime and meanwhile part of iron impurities are removed. Sodium carbonate is adopted for a regulating agent for restraining flotation of quartz and feldspar. YOA is adopted as a collecting agent for obviously removing carbonate mineral impurities in the tailings and part of iron impurities at the same time. The frequency of operation of flotation impurity removal is increased, so that the removing rate of iron and other impurities is obviously increased, and the levels of aluminum oxide and silicon oxide are greatly improved. By the adoption of the method, the recycling rate of recycled quartz and feldspar mixture products is over 75%, and the quality of the products is close to that of second-level feldspar products or glass-level albite products. The process flow of the method is simple, production cost is low, secondary environmental pollution is avoided, and quartz and feldspar resources in the gold flotation tailings can be used to the maximum extent.

Description

technical field [0001] The invention belongs to the technical field of tailings treatment, in particular to a method for recovering a mixture of 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 flota...

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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