Automatic screening and mixing system for hazardous powder materials

Abstract

The invention discloses a screening and mixing system for powder materials. The screening and mixing system comprises a double-cone mixer, a discharging device, a rotating vibrating screening device,a scraping device and a control system. By the aid of the screening and mixing system, the problems that major potential safety hazards exists during manual screening and mixing of the hazardous powder materials in the preparation process of a modified double-base propellant and the human health is seriously harmed due to dust flying are solved. The screening and mixing system can be used for screening the hazardous powder materials such as RDX, HMX, NC spherical propellants, Al powder and the like and is applicable to screening of single powder materials or mixing and screening of multiple powder materials.

Description

technical field [0001] The invention relates to a system that can be used for screening dangerous powder materials such as RDX, HMX, NC spherical medicine, Al powder, etc., and is suitable for screening powder materials. Background technique [0002] Dangerous powder materials are commonly used materials in gunpowder, and their particle size control has a great impact on the performance of gunpowder. Due to the dangers of the explosives industry, the development of process automation is relatively slow. At present, propellants and propellants are still prepared by manual sieving and mixing in the raw material processing link. Mixing, and then gently stirring manually, rolling through the sieve, because the powder has been dried in advance, the proportion of ultra-fine powder of about 10 microns is very large, there is a lot of friction during the sieving and mixing process, and there is a large There is a hidden danger of explosion, and the flying dust is a serious hazard t...

AI Technical Summary

Problems solved by technology

Due to the dangers of the explosives industry, the development of process automation is relatively slow. At present, propellants and propellants are still prepared by manual sieving and mixing in the raw material processing link. Mixing, and then gently stirring manually, rolling through the sieve, because the powder has been dried in advance, the proportion of ultra-fine powder of about 10 microns is very large, there is a lot of friction during the sieving and mixing process, and there is a large Potential explosion hazard, meanwhile, flying dust is a serious hazard to human health

Due to its particularity, the modified double-base propellant needs to mix and sieve various powder materials. At present, there is no report on the automatic sieving and mixing of dangerous powder materials. The automation and human-machine isolation operation of this process is still blank.

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