Oscillating spiral dry separator

Abstract

The invention relates to an oscillating spiral dry separator applied to the dry separation of fine coal and other fine minerals. The separator mainly comprises a spiral cylinder, an oscillating platform, an oscillating device, a spiral groove bed surface, a chute and a material inlet-outlet nozzle; a double motor is adopted to drive the spiral groove surface to generate the combine movement of oscillation and twisting, and the defects of the current fine coal dry separation are overcome; the generated shearing force separates conglutinated gangue and coal particles between particles and creates the preconditions for density separation; because the spiral groove surface has a radius inclination angle with high outside and low inside, the particles are under the action of inertia force, torsional force, gravitation, friction force and wind force, materials move towards the inner side of the spiral groove while moving upwards along the spiral groove, so that layering and zoning are achieved according to different densities, and therefore, the separation is realized. The equipment has simple structure, novel design conception, stable and reliable separation, significant effect of energy saving and consumption reduction, good separation effect and wide practicality.

Description

technical field [0001] The invention relates to a vibrating screw dry sorting machine, which is especially suitable for dry sorting of fine-grained coal and also suitable for dry-method sorting of other fine-grained minerals. Background technique [0002] At present, there are two main types of coal dry separation technology in China: one is the air-dense medium fluidized bed separator developed by China University of Mining and Technology; The FGX type compound dry sorting machine developed on the Internet, and the FX type dry sorting machine developed on the basis of the Russian wind shaker, as well as the CFX type differential wind sorting machine which uses synchronous belt transmission to change the transmission device from this machine. Sorting machine. The first type is to use the gas-solid two-phase to realize the layering and separation of different density granular materials in the fluidized state; the second type is to use the combined effect of wind force and vi...

AI Technical Summary

Problems solved by technology

However, for a large amount of fine-grained materials (<6mm), the separation effect is not ideal, and the lower limit of separation for both is 6mm

[0003] The main reasons for the poor separation effect of fine-grained coal (<6mm) are as follows: First, due to the segregation of fine-grained materials, some low-density coarse-grained coal enters the bottom of the separation bed, that is, the gangue layer, resulting in the loss of clean coal; Part of the high-density fine-grained gangue will float on the upper part of the bed under the action of wind force and enter the clean coal layer, causing pollution of the target minerals; third, there is liquid bridge force on the surface of relatively humid fine-grained materials, resulting in fine-grained coal and gangue. Agglomerates stick together, so effective separation cannot be achieved

Images