Marble desulfurizing agent desulfurization method and byproduct cyclic utilization method thereof

Abstract

The invention relates to a marble desulfurizing agent desulfurization method and a byproduct cyclic utilization method thereof. A marble desulfurizing agent is prepared by the following steps: precipitating into a slurry through a precipitation tank, squeezing into a mud cake by a filter press, and grinding into sand powder by a grinding machine. The marble desulfurizing agent is mixed with water,and dispersing is performed by using a high-speed liquid dispersing machine to prepare an absorption slurry with the solid content of 20-35%; in an absorption tower, flue gas containing sulfur dioxide is in spray contact with an absorbent slurry for physical and chemical reaction, and finally byproducts CaSO3 and CaSO4.2H2O crystals for curing sulfur dioxide are generated and fall into an absorption slurry circulating pool arranged at the bottom of the absorption tower. A large amount of air is blown in to forcibly oxidize CaSO3 to generate CaSO4.2H2O. The desulfurizing agent is premixed withmarble dry powder, so that the problems that the desulfurized gypsum is high in water content and high in viscosity, accumulated materials are blocked, the grading is poor, and the rheological property is poor after water is added are solved. The mixture is mixed with other raw materials to prepare putty powder and self-leveling mortar, and the putty powder and the self-leveling mortar are addedinto concrete as a filling early strength agent.

Description

technical field [0001] The invention relates to the technical field of solid waste recycling, and mainly relates to a marble desulfurizing agent desulfurization method and a method for recycling by-products thereof. Background technique [0002] For a long time, many stone companies and scientific research institutes have carried out a series of projects related to the resource utilization of stone solid waste, and have carried out fruitful research on the recycling and comprehensive utilization technology of stone solid waste, especially marble cutting and polishing waste. With certain achievements, some application products have been developed, and there are also related patents and paper reports. Among them, there are also relevant patent disclosures on the technology of using marble waste residue to prepare desulfurizer. For example, application number: 201310438543.7 A method for preparing a desulfurizer for a thermal power plant by using waste marble powder (hereinaft...

AI Technical Summary

Problems solved by technology

Aiming at solving the problem that desulfurization gypsum, a by-product of marble desulfurizers in the prior art, is still mainly piled up and landfilled, which not only occupies a large amount of land, but also returns the desulfurized sulfur to the land, causing secondary environmental pollution that is more harmful than direct filling Buried Marble Worse Problems

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