Lead dross treatment method

A treatment method, the technology of lead scum, applied in the field of metal processing, can solve the problems of low crude lead output rate, complex process, high energy consumption, etc., and achieve the effects of good environmental protection effect, wide material adaptability, and large processing capacity
CN105543493AInactive Publication Date: 2016-05-04WESTERN MINING CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WESTERN MINING CO LTD
Publication Date
2016-05-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the field of metal processing, and particularly relates to a lead dross treatment method. The lead dross treatment method comprises the steps that (1), a mixed material formed by mixing lead dross, sodium carbonate, coke and scrap iron according to a certain proportion is fed into a drying system to be dried; (2), the dried mixed material enters a Kaldo furnace to be heated up; (3), the mixed material in the Kaldo furnace is all molten, and after the Kaldo furnace is rotated at a high speed for a period of time, the rotation speed is decreased slowly to below 2 r / min; and (4), after no sharp reaction exists in the Kaldo furnace, a furnace body in the Kaldo furnace stops rotating, and crude lead is generated. The lead dross treatment method provided by the invention has the characteristics of being high in automation degree, high in thermal efficiency, good in lead and copper separation effect, large in handling capacity, high in one-time productivity of the crude lead, good in environment protection effect and the like.
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Description

technical field

[0001] The invention belongs to the technical field of metal processing, and in particular relates to a method for treating lead scum. Background technique

[0002] Due to the impurity contained in the raw material of lead concentrate, the purity of crude lead produced by different products is generally in the range of 96%-99%, of which 1%-4% is precious metals such as gold, silver, selenium, antimony and other rare metals as well as copper, nickel, tin, Bismuth, arsenic and other impurity metals. The value of precious metals in crude lead sometimes exceeds the value of lead. In order to effectively enrich and recycle these valuable metals, crude lead must be subjected to necessary refining treatment.

[0003] The refining process is divided into fire refining and electrolytic refining. In the electrolytic refining process of crude lead, when the copper in the anode plate is greater than 0.06%, it will cause the anode slime to become hard and dense, hinderin...

Claims

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