Method for preparing desulfurizer from solid waste generated in soda ash plant industry

Abstract

The invention discloses a method for preparing a desulfurizer from solid waste generated in soda ash plant industry, which comprises the following steps: (1) mixing: evenly mixing return stone, return sand and gravel; (2) impurity removal: discharging the mixed material into a feed hopper, removing dust, discharging to a delivery belt, and removing impurities on the belt; (3) drying: delivering the material into a drying oven provided with a pulse dust remover through the belt, and carrying out drying and dust removal on the material; (4) crushing: delivering the material discharged from the drying oven into a crusher through the belt, and crushing; and (5) grinding: delivering the crushed material to a ball grinder, grinding in the ball grinder, selecting powder, and sending into a finished product bin. The invention has the advantages of simple technical process and low energy consumption, can be used for preparing the high-quality limestone powder desulfurizer with high CaO purity, high activity and fewer impurities, changes wastes into valuable substances, and greatly lowers the production cost.

Description

Technical field [0001] The invention relates to the comprehensive utilization of solid wastes produced in the soda ash plant industry by the ammonia-soda method, in particular to a method for preparing high-quality limestone powder desulfurizers by using the solid wastes produced in the soda ash plant industry. Background technique [0002] Soda ash is a basic industrial raw material with the largest output and a very wide range of uses in the basic chemical industry. my country is the world's largest soda ash producer with the largest production capacity and the only soda ash producer in the world with three mature production processes of Hou Soda, ammonia soda and trona. At present, the annual output of soda ash in my country is as high as 24 million tons, accounting for more than 40% of the global soda ash output. Ammonia soda and trona soda ash plants are obviously restricted by resources, geography, and environmental protection. The trona process is essentially the producti...

AI Technical Summary

Problems solved by technology

The cost of stacking and transportation of sand, rock and gravel, land occupation and treatment costs will inevitably lead to an increase in the overall cost of the alkali plant, and may also lead to environmental protection failure.

[0006] At present, there are few reports at home and abroad on the comprehensive utilization of returning sand, returning stone and crushed stone in the process of producing soda ash by the ammonia-soda method. The main reason is that its pollution and harm are far lower than the waste gas, waste liquid and Alkali slag, etc., and, for a long time, these solid wastes have been used for paving roads or as raw materials for shaft kiln cement, etc. Although the use value is very low, most of them can still be consumed

Images