Solid waste comprehensive utilization method in multi-metal sulfide mineral mining-smelting overall process

Abstract

The invention discloses a solid waste comprehensive utilization method in a multi-metal sulfide mineral mining-smelting overall process. The method comprises the following steps: according to a principle that content of each heavy metal element in a mixture of mill tailings and gravels meets a national standard and content of a particle component of which a mill tailings particle size is greater than 0.075 mm exceeds 50%, acquiring a gravel mass optimal percentage in the mixture of the mill tailings and the gravels, in a preparation process of an engineering filling material, controlling a water content condition within a range of 13%-17% of the optimal water content, layering and compacting, measuring a CBR value through an experiment, and guaranteeing to reach a strength requirement of the engineering filling material. At the same time, a leaching experiment is performed by a self-manufactured device, only if detected heavy metal leaching concentration of mixed aggregate is lower than a national standard requirement, the mixed aggregate can enter a practical application stage. The method is capable of realizing a reduction requirement of a solid waste in a copper mine smelting production overall process, changing waste materials into things of value, preventing a large number of engineering backfill earth volumes from occupying cultivated land, and turning harm into benefit.

Description

technical field [0001] The invention relates to a method for comprehensive utilization of solid waste, which belongs to the technical fields of metallurgy, building materials, environmental rock and soil, and in particular to a method for comprehensive utilization of solid waste of polymetallic sulfide ore. Background technique [0002] The production process commonly used in copper ore smelting is: copper-sulfur mixed flotation-mixing and regrinding-copper-sulfur separation-floating tail magnetic separation process to recover copper, gold, silver, sulfur, iron and other valuable components. During the beneficiation process, a large amount of high-alkaline wastewater containing suspended solids and flotation agents is produced, which is collected in the tailings slurry. The tailings of the dressing plant are classified, and the coarse sand is used for underground filling. The biscuit line is stockpiled, the overflow and filtrate are sent to the tailings storage. [0003] A ...

AI Technical Summary

Problems solved by technology

In particular, a large amount of fine-grained copper tailings are piled up in the tailings pond and cannot be disposed of well, which not only occupies a large amount of farmland, but also easily causes harm to the surrounding environment

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