Comprehensive utilization method of solid waste in the whole process of mining and smelting of polymetallic sulfide ore

Abstract

The invention discloses a method for comprehensive utilization of solid waste in the whole process of mining and smelting of polymetallic sulfide ores. According to the content of each heavy metal element in the mixture of tailing sand and gravel meeting the national standard principle and the particle size of tailing sand greater than 0.075mm Based on the principle that the group content exceeds 50%, the optimum percentage of crushed stone mass in the mixture of tailings sand and crushed stone is obtained. During the preparation of engineering filling materials, the moisture content condition is controlled within the optimal moisture content range of 13% to 17%. Internally, layered compaction, the CBR value is determined through experiments to ensure that the strength requirements of the engineering filling materials are met. At the same time, the leaching experiment can be carried out by the self-made device of the present invention, and it is detected that the leaching concentration of heavy metals in the mixed aggregate is lower than the requirement of the national standard before entering the practical application stage. The invention realizes the requirement of reducing the amount of solid waste in the whole process of copper ore smelting and production, turns waste into wealth, and at the same time avoids the occupation of arable land by a large amount of engineering backfill earthwork, 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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