Pneumatic method for separating mineral raw materials

Abstract

The invention relates to the field of separating mineral raw materials and can be used for producing mobile separating plants which are intended for processing and classifying raw materials accordingto fractions virtually in any weather conditions, including at ambient air temperatures of -50 to +50 DEG C. What is claimed is a pneumatic method for separating mineral raw materials, and the methodincludes placing raw materials which are to be separated on an air-permeable surface which traverses a separation chamber with a rising air flow that lifts light fractions from the air-permeable surface, the latter being in the form of a conveyor passing beneath the lower base of the separation chamber, in which, by selection of the velocity of the air flow, a dilute fluidized bed is formed from particles of a specified density, into which less dense particles enter and through which said particles pass without obstruction before being transferred with the rising air flow out of the separationchamber into a gravitational deposition chamber. The method is characterized in that the the separation chamber is mounted at an inclination to the plane of the conveyor, wherein the lower base of said separation chamber is parallel to the plane of the conveyor, and the acute angle formed between the longitudinal walls of the separation chamber and the base thereof is oriented in the direction ofmovement of the conveyor.

Description

technical field [0001] The invention relates to the field of separation of mineral raw materials and can be used in the production of mobile separation equipment that treats and sorts raw materials according to their elements and can be used in any weather conditions, including air temperatures from -50 to +50°C. Background technique [0002] As we all know, one of the main methods of separating ore, coal, and non-metallic materials is a specific density separation method (ie, gravity method). The decrease in the quality of extracted raw materials and the increase in the quality of concentrates for further processing in power engineering, metallurgical and chemical industries have greatly increased the requirements on the efficiency of the raw material separation methods used. [0003] Similarly, it is known that large quantities of mineral waste have accumulated during the operation of separation plants and metallurgical processing plants. This waste not only pollutes the ...

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Problems solved by technology

[0017] Second, an increase in the conveyor speed automatically leads to a change in the diluted fluidized bed layer and an increase in density near the rear wall of the vertical chamber (along the direction of conveyor movement), which disturbs the normal flow of particle motion in the pseudo-boiling layer ( because of increased density of the particles), which prevents particles of lower density from passing through it, i.e. this causes heavier particles to dislodge lighter particles and reduces the performance of the separation process

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