Method for preparing metal iron from copper slag

A technology of metallic iron and copper slag, which is applied in the field of preparing metallic iron from copper slag, can solve the problems of unsatisfactory use requirements, high content of Cu, S and As, etc., and achieve the effects of improving utilization rate, reducing activity, and improving economic value
CN109112243AActive Publication Date: 2019-01-01钢研晟华科技股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
钢研晟华科技股份有限公司
Publication Date
2019-01-01

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Abstract

The invention relates to a method for preparing metal iron from copper slag, belongs to the technical field of comprehensive utilization of metallurgical resources and solves the problems of the priorart that the molten iron prepared from copper slag has relatively high content of Cu, S and As and cannot meet the using requirements. The method for preparing metal iron from copper slag comprises the following steps: (A), performing alkaline-process and vulcanizing separation of the copper slag to obtain a sulfonium phase and a slag phase, enriching copper and FeO in the sulfonium phase, and enriching As in the slag phase; (B), performing smelting reduction separation of the sulfonium phase to realize separation of iron and sulfonium phase to obtain molten iron of metal while keeping the copper in the sulfonium phase. According to the method provided by the invention, the prepared molten iron contains less than 0.1% of copper, less than 0.3% of sulfur and less than 0.03% of As and meetsthe requirements on the molten iron for steelmaking.
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Description

technical field

[0001] The invention relates to the technical field of comprehensive utilization of metallurgical resources, in particular to a method for preparing metallic iron from copper slag. Background technique

[0002] Copper matte smelting is currently the main metallurgical method for copper. The smelting slag after separation of the matte phase contains about 30% to 40% iron and 0.5% to 2% copper. Efficient use of copper metallurgical slag can be achieved in terms of resource utilization and environmental protection. angles are significant.

[0003] Research on the recycling of copper slag has been actively carried out. A large number of research results have confirmed that the stubborn problem of copper slag utilization lies in the unqualified quality of metallic iron, in which the contents of S, As, and Cu are all much higher than the qualified content level of iron. The application range of iron is narrow and the added value is low, resulting in the utilizatio...

Claims

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