Method and apparatus for processing sulfur-containing flue gas by lean manganese mine and rhodochrosite

Abstract

The invention discloses a method and an apparatus for processing sulfur-containing flue gas by lean manganese mine and rhodochrosite. The method comprises the processes of absorption, purifying, crystallization and drying. SO2 in the sulfur-containing flue gas can be absorbed by lean manganese mine and rhodochrosite, a part of a resultant generated by absorption of SO2 can be purified, crystallized and dried for being as an ingredient water of the lean manganese and rhodochrosite for cycle use, and the other part is taken as a by-product. According to the invention, MnSO4 production and SO2 exhaust gas treatment are combined, harmlessness, quantitative reduction and resource of SO2 can be realized, and the method develop the market for using the lean manganese mine resource. The operation cost is low, the method is not restricted by manganese mine grade, a reduction calcination process of the manganese sulfate production is omitted, a lot of energy is saved, sulfuric acid source problem is solved, SO2 exhaust gas treatment problem can be solved, and the manganese sulfate product can reach the requirement of fertilizer grade (GB1622-86) and feed grade (GB5253-87).

Description

technical field [0001] The invention relates to a method and a device for treating sulfur-containing flue gas with manganese-poor ore and rhodochrosite, and belongs to the technical field of sulfur-containing flue gas desulfurization and comprehensive utilization. Background technique [0002] The problem of air pollution in iron and steel complexes is becoming more and more serious. The raw materials and fuels of the iron and steel industry are limited by economy, cost and resources, and it is difficult to fundamentally solve SO 2 environmental pollution problems. According to incomplete statistics, the production of each ton of steel sintering process SO 2 The emission is 1.15kg / t steel, and the SO in the flue gas 2 The concentration is low, the mass concentration is less than 0.5%, the sintering flue gas volume is large, the temperature range is also large, the flue gas volume fluctuates greatly, the paroxysm is strong, the emission point distribution is wide, ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a method and device for treating sulfur-containing flue gas with poor manganese ore and rhodochrosite, so as to solve the problem of sulfur-containing flue gas with low energy consumption and low cost. The problem of flue gas desulfurization and comprehensive utilization, and can generate fertilizer or feed by-products

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