Method and device for rapidly and continuously preparing zeolite molecular sieve from solid waste through ultraviolet irradiation

Abstract

The invention provides a method and a device for quickly and continuously preparing a zeolite molecular sieve by using solid waste through ultraviolet irradiation. The method comprises the following steps: (1) mixing raw material powder prepared from at least one of lithium silicon powder, silicon aluminum gangue tailings and red mud with acid liquor, carrying out a stirring reaction, and washingand drying the obtained solid phase; (2) mixing the obtained pretreated raw material with an alkaline substance, roasting the mixture in a nitrogen atmosphere, then crushing and sieving the roasted material and mixing it with a solvent; and (3) continuously introducing the obtained molecular sieve precursor into a channel made of a quartz glass material, enabling the molecular sieve precursor to flow in the channel at a constant speed, applying ultraviolet irradiation covering the whole channel to the channel, collecting a reaction product at the outlet end of the channel, performing solid-liquid separation, and washing and drying the obtained solid product to obtain the zeolite molecular sieve. Resource utilization of solid waste is achieved, the production cost is reduced, the productionperiod is shortened, and meanwhile the quality of the zeolite molecular sieve is improved.

Description

technical field [0001] The invention belongs to the technical field of molecular sieve synthesis, and relates to a method and a device for rapidly and continuously preparing zeolite molecular sieves by using solid waste through ultraviolet irradiation. Background technique [0002] Zeolite molecular sieve is a tetrahedron with a three-dimensional topological framework structure, which has strong adsorption and ion exchange capabilities, and has potential applications in the fields of catalysis, medicine, water treatment and optics. The industrial synthesis method of zeolite molecular sieve is still the hydrothermal crystallization synthesis method using industrial silica sol and industrial water glass as raw materials. The hydrothermal crystallization synthesis method needs to heat and react in a closed container above 100°C for 24 to 72 hours. The growth of zeolite needs to go through the processes of nucleation, growth and crystallization, etc. The production cycle is long...

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Problems solved by technology

[0004] In view of the high production cost of zeolite molecular sieves in the prior art, long production cycle, high temperature requirements, difficulty in continuous production, limited sources of synthetic raw materials, and large output of solid waste such as silicon-aluminum gangue tailings, lithium silicon powder and red mud , large environmental pollution, etc., the object of the present invention is to provide a method and device for rapidly and continuously preparing zeolite molecular sieves by using solid wastes through ultraviolet irradiation, so as to realize the recovery of solid wastes such as silicon-aluminum gangue tailings, lithium silicon powder, and red mud. Utilize resources, reduce the production cost of existing zeolite molecular sieves, shorten the production cycle of zeolite molecular sieves, and improve the quality of zeolite molecular sieves

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