Mining circulating type fine material screening device

Abstract

The invention discloses a mining circulating type fine material screening device and belongs to the technical field of mining fine material screening. An outer screening barrel, a middle screening barrel and an inner screening barrel are arranged in an outer conical barrel in a stacked and sleeved mode; under the action of gravity and centrifugal force, mineral materials are subjected to layer-by-layer grading and circulating screening from outside to inside and from top to bottom; by means of conical screening structures which are arranged in an inner and outer sleeving mode, the large screening area is provided, the size of screening equipment is reduced, fine materials meeting the standard are guided out through lower screening meshes, and the mineral materials which are not filtered out are graded and blocked through an upper annular baffle, a middle annular baffle and a lower annular baffle; after screening is completed, all electromagnetic valves are opened, the mineral materials of different specifications are collected, so that the graded mineral materials can be subsequently ground and circularly screened again; in addition, the conical screening structures are arranged in the outer conical barrel in a sleeved mode, so that closed screening is achieved; and a dust collection flow guide bag is arranged at the bottom end of the outer conical barrel and used for conducting dust collection treatment on the mineral materials guided out in a graded mode.

Description

technical field [0001] The invention relates to the technical field of mining fine material screening, and more specifically, relates to a mining circulating fine material screening device. Background technique [0002] In the process of mineral material processing, crushing treatment is required to obtain relatively fine mineral material particles to facilitate subsequent processing. The sieving machine for granular materials in the prior art is a process in which one or more sieve surfaces are divided into different particle grades, which is called sieving. Through the sieve hole, the mineral material is divided into different grades of screening mechanical equipment according to the particle size. [0003] However, in this prior art, the screening equipment for mineral materials is usually single-screened, and it is difficult to obtain fine materials with good grades in a single screen; for better screening grades of fine materials, the screening equipment needs more spa...

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Problems solved by technology

[0003] However, in this prior art, the screening equipment for mineral materials is usually single-screened, and it is difficult to obtain fine materials with good grades in a single screen; for better screening grades of fine materials, the screening equipment needs more space to accommodate more screens. net, resulting in a large volume of mineral material screening equipment; at the same time, a large amount of dust will be generated during the mineral material screening process. good health

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