Alkaline residue recycling method, product and application

Abstract

The invention discloses an alkaline residue recycling method, a product and application, and belongs to the field of solid waste recycling. The method comprises the following specific steps: a) respectively preparing alkaline residue powder and agriculture, forestry and animal husbandry biomass powder, and uniformly mixing to obtain a mixture; b) carbonizing the mixture under the protection of aninert gas, specifically, raising the temperature to 600-900 DEG C, carbonizing for a certain time under the condition of 600-900 DEG C, and then cooling to room temperature to obtain grey black residues; c) crushing the grey black residues, and cleaning the grey black residues; and d) drying the grey black residues, and grinding the grey black residues into powder to obtain the product. The carbon-based material which is more developed in pore structure and more excellent in adsorption performance than commercial activated carbon is obtained by utilizing the preparation method, and efficient removal efficiency is shown for organic pollutants. According to the method, efficient recycling of the alkaline residues and the biomass is achieved, and meanwhile the low-cost and efficient organic pollutant adsorbing and removing product is prepared.

Description

technical field [0001] The invention belongs to the field of solid waste recycling, and more specifically relates to a method, product and application of alkali residue recycling. Background technique [0002] The ammonia-soda method is the main process of industrial production of soda ash-sodium carbonate, that is, calcining quicklime to produce lime milk, adding ammonium chloride to produce ammonia gas, and reacting with refined salt to produce sodium carbonate. It is worth noting that in this process, a large amount of solid waste will be produced, that is, alkali slag, which is mainly composed of calcium oxide, magnesium oxide, silicon dioxide, aluminum oxide, calcium hydroxide, calcium chloride, calcium sulfate and other substances . According to statistics, for every 1t of sodium carbonate produced, 0.3t of alkali residue will be produced. According to reports, my country's soda ash industry produces about 10,000,000 tons of alkali slag every year, and it is piled up...

AI Technical Summary

Problems solved by technology

However, strong alkaline or acidic activators are required in the production process of commercial activated carbon. The production process is not friendly to the environment, it is difficult to produce in batches, and the price is relatively expensive. It is difficult to apply to the restoration of a wide range of organically polluted water bodies.

In addition, commercial activated carbon contains a large number of irregular microporous structures (pore size less than 2nm), which may cause molecular sieve effect when adsorbing organic pollutants such as antibiotics and phthalates with large molecular sizes, limiting the mass transfer process and affecting its ability to remove antibiotics from water. and phthalate applications

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