Screening equipment for low-fluidity submicron ceramic granulation powder and screening process thereof

Abstract

The invention discloses screening equipment for low-fluidity submicron ceramic granulation powder and a screening process thereof. The screening equipment comprises a box body, a first powder collecting cavity, a second powder collecting cavity and a third powder collecting cavity are formed in the box body, and a first working cavity and a second working cavity are sequentially formed in the box body from top to bottom; due to the arrangement of two screening units, screening of the relatively high-quality granulation powder within the range of 53-150 micron can be achieved; an S-shaped screen, a rotatable screening unit and a rotatable row brush greatly improve the fluidity of granulation powder raw materials in the screening process, stacking of the raw materials in the thickness direction is avoided, the utilization rate of the screen is increased, the probability of screen blockage is reduced, the maintenance cost of the screen is reduced, the discharging efficiency of the screening equipment is improved, and the screening efficiency is improved while the normal operation of the high-quality granulation powder screening process is ensured.

Description

technical field [0001] The invention relates to the technical field of ceramic production, in particular to screening equipment and a screening process for low fluidity submicron ceramic granulated powder. Background technique [0002] Before ceramic sintering, the granulated powder with small grain size, large specific surface area and high surface activity requires only a low sintering temperature and sintering activation energy due to the short diffusion distance between particles. The smaller the particle size, the more It is easy to sinter, the sintering temperature is lower, and the sintering time is shorter; at the same time, the powder particles with small particle size can also disperse the stress concentration at the boundary caused by the different expansion coefficients of corundum and glass phases, reducing the risk of cracking; Small grains can also hinder the development of micro-cracks, which is not easy to cause transgranular fracture, which is conducive to ...

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Problems solved by technology

[0005] Existing screening equipment generally uses screens of corresponding mesh placed horizontally or inclined to screen granulated powder raw materials, such as linear vibrating screens, etc. Due to the small inertia and poor fluidity of submicron granulated powder itself, With the existing screening equipment, the granulation powder raw materials are often stacked in the thickness direction of the screen after feeding, the utilization rate of the screen is low, and the cost of screen maintenance is high; and the screened powder is difficult to discharge At the same time, the probability of screen blockage will also increase, which will seriously reduce the screening efficiency

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