Method for recovering nepheline ore in nepheline mine tailings

Abstract

The invention discloses a method for recovering nepheline ore in nepheline ore tailings. The method includes the steps that the nepheline ore tailings are smashed and ground to obtain tailing primary pulp; a hydrocyclone is used for classifying the tailing primary pulp; the tailing primary pulp classified by the hydrocyclone is concentrated, so that the concentration of the tailing primary pulp is made to at least reach 3.5%; iron removal and pyroxene removal treatment is carried out on the concentrated tailing primary pulp by the adoption of wet-type low-intensity magnetic separation and at least one level of high-gradient magnetic separation; flocculating agents are added to the tailing primary pulp subjected to iron removal and pyroxene removal treatment in a stirring mode; the tailing primary pulp with the added flocculating agents is conveyed to a settling pond through a pipeline to be subjected to standing treatment; supernatant in the settling pond is discharged in an overflowing mode, and pulp flocculating constituents are fed into a filter press to be filter-pressed into filter cakes; and the filter cakes fall freely under the effect of gravity, and are dispersed under an impact effect and then conveyed to a dry storage yard through a vehicle to be recovered.

Description

technical field [0001] The invention relates to a finishing process for ore, in particular to a method for recovering nepheline ore in nepheline ore tailings. Background technique [0002] Nepheline is a rare non-metallic ore. At present, except China, only four mines in Canada, Norway, Brazil and Turkey are exploiting this resource, supplying developed countries such as Europe and the United States as glass, ceramics and chemical products. raw materials for production. Due to the symbiosis between the dark minerals pyroxene, biotite and iron oxides in China, it is necessary to remove the dark minerals (iron, calcium, magnesium) in the original ore through beneficiation treatment, and a large amount of tailings will be produced during the above refining. . [0003] At present, most of the domestic concentrators generally have two ways to deal with this problem: one is to transport it to the tailings pond for storage through pumps and pipelines; the other is to treat it as ...

AI Technical Summary

Problems solved by technology

However, these two methods have their own shortcomings. For the former, the investment in building tailings ponds is quite large, and the site selection and subsequent approval processes are quite cumbersome. The most important thing is the safety of tailings ponds. It is a major source of danger, and if there is a slight error, it will pose a great threat to the safety of people's lives and property.

For the latter, the disposal of the sludge picked up after settlement is a thorny issue. First, it will occupy a large amount of production land, second, it will deteriorate the working environment, and third, it is difficult to effectively dispose of these sludges.

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