Method for recycling iron tailing sand

Abstract

The invention discloses a method for recycling iron tailing sand. The method for recycling the iron tailing sand comprises the following steps: feeding the iron tailing sand into a desulfuration device for carrying out desulfuration so as to obtain sulfur particles and desulfurized iron tailing sand; feeding the desulfurized iron tailing sand into a drying device for drying until the content of water in the desulfurized iron tailing sand is smaller than 1%; absorbing iron powder in the dried iron tailing sand by using a magnetic device so as to obtain iron powder and the iron tailing sand after iron is removed; feeding the iron tailing sand after the iron is removed to a dust removing device for removing dust so as to obtain the iron tailing sand after the dust is removed; feeding the iron tailing sand after the dust is removed into a screening device for screening so as to obtain heat preservation sand slurry raw materials different in particle sizes. By virtue of the method for recycling the iron tailing sand, the iron tailing sand is efficiently recycled, so that the environmental problem caused by piling the iron tailing sand can be solved; the iron tailing sand can be used for replacing natural river sand and taken as a raw material for manufacturing the heat preservation sand slurry, so that the environmental problem and the resource exhaustion problem caused by dredging the natural river sand can be solved.

Description

technical field [0001] The invention relates to the technical field of tailing sand recovery, in particular to a method for iron tailing sand recovery. Background technique [0002] Tailings sand is the waste after the ore beneficiation process, most of which contain minerals that have not been fully recovered. Depending on the type of ore, the composition of tailings sand is also very different. At present, due to the limited technical level of the beneficiation process, iron powder and sulfur particles that have not been recovered basically exist in the iron tailings obtained after all kinds of iron ore go through the beneficiation process, and the iron powder content is usually as high as 30%. ~40%, which causes a serious waste of resources. In the existing technology, iron ore enterprises such as iron powder factories mainly dispose of iron tailings by stacking them in tailings dams, which not only affects the destruction of the ecological environment and wastes land r...

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Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a method for recycling iron tailings, which not only realizes the efficient recycling of iron tailings, solves the environmental problems caused by stacking and discarding iron tailings, but also It can replace natural river sand as a raw material for making thermal insulation mortar, thus solving the environmental problems and resource depletion problems caused by mining natural river sand

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