System for processing exhaust gas of rare earth electrolysis process

Abstract

The invention provides a system for processing exhaust gas of a rare earth electrolysis process. By virtue of the system, the exhaust gas produced after electrolyzing of the rare earth firstly flows through an exhaust gas absorbing device; the exhaust gas is intensively collected and then conveyed to a rear earth recycling device; the residual rare earth in the exhaust gas is recycled, so that the loss of the material is avoided; the exhaust gas after recycling of the rare earth is conveyed to an exhaust gas cooling device, so that the high-temperature electrolysis exhaust gas is cooled, thus direct emission of the high-temperature exhaust gas is avoided; the cooled exhaust gas is conveyed to an exhaust gas purifying device, so that acid gas and dust remaining in the exhaust gas are purified, thus direct emission of the acid gas is avoided; finally, the exhaust gas is conveyed to an exhaust gas neutralizing device, so that the exhaust gas reaches the emission standard, thus safe emission of the electrolysis exhaust gas is achieved.

Description

technical field [0001] The invention relates to the technical field of rare earth preparation, and more specifically relates to a rare earth electrolysis tail gas treatment system. Background technique [0002] Rare earth elements are very active metals, and it is difficult to extract them from their compounds by general methods under normal conditions. In industrial production, rare earth metals or their alloys are prepared from rare earth chlorides, fluorides and oxides by molten salt electrolysis and metal thermal reduction. [0003] Rare earth dissolved salt electrolysis is a process of producing rare earth metals and rare earth alloys through electrolysis, which is based on rare earth oxides as the main raw material. During the electrolytic reaction process, certain acidic substances such as fluorinated gas and rare earth dust will be produced. In the existing electrolytic production process of rare earth oxides, the acidic gas and dust generated by electrolysis are ge...

AI Technical Summary

Problems solved by technology

During the electrolytic reaction process, certain acidic substances such as fluorinated gas and rare earth dust will be produced. In the existing electrolytic production process of rare earth oxides, the acidic gas and dust generated by electrolysis are generally not treated, and are directly discharged to the outside, which is not only serious It affects the life safety of operators, and also produces acid and dust pollution to the atmospheric environment

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