Method using electrolytic manganese slag to manufacture active mixed material

Abstract

The invention discloses a method using electrolytic manganese slag to manufacture an active mixed material. According to the preparation method, an activator and a reducing agent are added into electrolytic manganese slag according to a certain ratio so as to carry out physical and chemical reactions at a high temperature; the reaction products are calcined, and finally the calcined clinker is cooled to obtain the active mixed material. The active mixed material has the properties of volcanic ash, and can be used as the active mixing material in cement industry and composite blending material in commercial concrete industry. A large amount of acid leached slag discharged by electrolytic manganese plants can be used to produce the active mixed material, the environmental pollution generated by harmful components in electrolytic manganese slag is radically eliminated, the clean production of electrolytic manganese can be realized, the pollution is comprehensively controlled, and high economic benefit and environment protection benefit are generated.

Description

technical field [0001] The invention relates to an activation treatment method of metal smelting waste slag, in particular to a preparation method of using electrolytic manganese slag to produce active mixed materials. Background technique [0002] Electrolytic manganese slag is to add sulfuric acid solution to manganese carbonate ore powder to electrolyze to produce manganese dioxide filter residue. The production process is to add sulfuric acid solution and manganese carbonate ore powder to react in the reactor to generate manganese sulfate. A small amount of iron sulfide ore powder is used as a reducing agent to oxidize Fe2+ into Fe3+ in the solution, and hydrolyze to form Fe(OH)3 precipitation, then neutralize the excess acid with lime milk, when the pH value is close to 7, add SDD saturated solution , so that the heavy metal ions in the solution generate corresponding sulfide precipitates, and then filter with a filter press, the filtrate enters the electrolytic cell fo...

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Problems solved by technology

[0003] For every ton of electrolytic manganese powder produced, about 7 to 8 tons of acid leaching waste residues with fine particles and a certain amount of harmful elements are discharged. On the one hand, these acid leaching waste residues increase the cost of land acquisition and site disposal for enterprises to pile up waste residues. It will increase the production cost of the enterprise and consume a lot of land resources. On the other hand, the long-term storage of waste residue will cause some harmful elements to penetrate through the soil layer and enter the surface and groundwater, affecting groundwater resources and polluting the environment.

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