Method for improving quality of micro-fine particle iron ore tailing return water

Abstract

The invention discloses a method for improving the quality of micro-fine particle iron ore tailing return water. The method comprises the following steps: adding water to lime to prepare lime milk and directly adding the lime milk to tailing slurry, and thoroughly mixing the lime milk and the tailing slurry, wherein the addition quantity of the lime is 1m<3> and the addition quantity of the tailing slurry is 300-1000g. According to the method, the content of micro-fine particle tailing solid in micro-fine particle red magnetic mixed iron core tailing return water is reduced, and therefore, the quality of the tailing return water can be improved, the interference on an ore separation system due to a fact that micro-fine particle ores go into the ore separation system again can be reduced, and the ore separation efficiency can be improved.

Description

technical field [0001] The invention relates to a method for improving the backwater quality of microfine iron ore tailings, and belongs to the technical field of backwater treatment. Background technique [0002] Sedimentary metamorphic iron ore deposits, the ore embedded with fine particle size, ore type and composition content are complex, which is extremely difficult to grind and beneficiate ore. In the iron ore beneficiation process, the grinding particle size -325 mesh may reach more than 92%, the tailings particle size is too fine, and the fine particles in the tailings are difficult to settle freely, resulting in poor quality of tailings return water (high solid content, reaching more than 4000ppm) . After the tailings backwater enters the mineral processing system, it can cause the equipment such as the ring water pump to wear and shorten the life, and the ring water pump pool is in the mine, requiring periodic cleaning and other problems. Poor return water qualit...

AI Technical Summary

Problems solved by technology

After the tailings return water enters the mineral processing system, it can cause the wear and tear of the ring water pump and other equipment to shorten the service life, and the ring water pump pool is in the mine, requiring periodic cleaning and other problems

Poor return water quality can lead to deterioration of mineral processing system indicators, part of the water needs to be replaced by new water, resulting in high unit consumption of new water and increased cost of mineral processing; at the same time, the water system is unbalanced, the water in the tailings pond cannot be fully recovered, and the water level rises too fast, affecting Tailings Dam Safety

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