Method for efficiently recycling metal in sintering machine head ash lixivium

CN120683364AActive Publication Date: 2025-09-23山西建邦集团铸造有限公司
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Patent Information

Application Number
CN202510909051.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-02
Publication Date
2025-09-23
Estimated Expiration
2045-07-02

AI Technical Summary

Technical Problem

The existing technology for processing sintering machine head ash has the problems of high energy consumption, high cost, easy generation of secondary pollution and poor recovery effect of precious metals and other valuable metals.

Method used

The sintering machine head ash is leached with a first acid solution of a specific concentration at a certain temperature, and solid-liquid separation is carried out after adding an oxidant. Subsequently, a multi-step treatment is carried out using a displacer and a precipitant, including displacement, acid dissolution and reduction, to separate and recover metals such as silver, bismuth, and copper, forming a displacement solid and a decontaminated liquid, and finally silver and gold ingots are obtained through smelting.

Benefits of technology

The method realizes efficient recovery of valuable metals, good separation effect, high product purity, and the residual liquid produced after separation can be reused without generating secondary pollution. It is suitable for large-scale production and has high economic benefits.

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Abstract

The invention relates to the technical field of metal resource recycling, in particular to a method for efficiently recycling metal in sintering machine head ash lixivium. The invention provides a method for efficiently recycling metals in a sintering machine head ash leaching solution, which comprises the following steps of: leaching sintering machine head ash by using a first acid solution with a specific concentration at a certain temperature, and dissolving valuable metals in the sintering machine head ash into the leaching solution; then enriching the metals from the solution by using a first displacer to form a displacement solid, and further separating the metals such as silver, bismuth and copper through a subsequent acid dissolution process; and the silver-containing solid is dissolved with a fourth acid solution, a reducing agent is added, sponge silver is obtained, the gold-containing solid is dissolved with aqua regia and then is reduced into sponge gold, and finally the sponge gold is smelted into a silver ingot and a gold ingot. The method provided by the invention solves the problems of high energy consumption, high cost, secondary pollution and poor recovery effect on precious metals and other valuable metals in the traditional treatment process.
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Citation Information

Patent Citations

  • Method for recovering silver and lead by separating dedusting ash from head of sintering machine in steel plant

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  • Method for recovering nearly all elements in low-precious-metal zinc replacement powder

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  • A recovery method for valuable metal from the LED wastes or electronic wastes

    KR1020170019246A

Cited By

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