Dry-method air-separation strong permanent magnetic separator

Abstract

The invention provides a dry-method air-separation strong permanent magnetic separator, belongs to the technical field of dressing equipment, and is particularly suitable for regenerating an ion-containing fly ash resource produced in a smelting process for making ion and steel. The dry-method air-separation strong permanent magnetic separator comprises a machine body and a magnetic roller arranged in the machine body, wherein the machine body is provided with a feeding hole, a discharge hole and an exhaust and air discharge hole; the magnetic roller comprises a fixedly arranged roller core and a roller sheet which surrounds the roller core and can rotate around the roller core; the internal space formed by the machine body and a semi-circumferential surface, provided with a magnetic area, of the roller core is divided into a material distribution area, a separation area and a blanking area by baffle plates from top down, and the material distribution area, the separation area and the blanking are mutually communicated; the machine body is provided with a nozzle device spraying air flow toward the separation area, the nozzle device is at least provided with a nozzle, and the tail end of the nozzle device is provided with an air inlet; and the roller core is divided into the magnetic area and a nonmagnetic area, and the magnetic area and the material distribution area and the separation area are arranged correspondingly. The separator overcomes the drawback that the prior art is incapable of directly and effectively separating fine weak magnetic ferric oxide mineral powder, and is low in energy consumption, low in productive operation cost, high in sorting purity, simple and reasonable in structure, and convenient in operation. In the separation process, the inside of the machine body is constantly kept in a negative pressure state so as to avoid dust overflow and secondary environmental pollution.

Description

technical field [0001] The invention relates to a dry-process winnowing strong permanent magnet magnetic separator, which belongs to the technical field of mineral processing equipment. It is suitable for the separation of magnetic and weakly magnetic iron oxide minerals with fine particles, especially for the regeneration of iron-containing dust and ash resources produced in the process of ironmaking and steelmaking. Background technique [0002] About 2% of the raw materials added to the furnace in the process of ironmaking and steelmaking are converted into dust. Iron-containing dust in steelmaking is mainly composed of iron oxide, and the rest includes oxide impurities (such as calcium oxide) and other metal oxides. (Mainly oxides of zinc). The characteristics of its iron-containing dust are: the average iron grade is 30-45%; low magnetic (magnetic ratio FeO / TFe×100%=16.01%<29%), high oxidation (degree of oxidation TFe / FeO×100%=6.28> 3.5); the particles are fine ...

AI Technical Summary

Problems solved by technology

As a sorting equipment for sorting fine magnetic minerals, the purity of the separated minerals is not high, and the weak magnetic minerals cannot be effectively separated, which will inevitably affect the grade and yield of the product, and affect the economic benefits of the enterprise.

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