A method for producing active zinc oxide by wet process
The zinc-containing furnace tailslag was treated through wet process, and chemical agents such as sulfuric acid and dodecylbenzenesulfonic acid were used, combined with precipitant and sodium carbonate treatment, which successfully improved the purity of zinc oxide and solved the problem of impurity ion contamination in the existing processes.
CN118908267BActive Publication Date: 2025-03-21ZHUZHOU ANTE NEW MATERIAL TECH CO LTD
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Patent Information
- Application Number
- CN202411049302.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2044-08-01
AI Technical Summary
Technical Problem
The existing zinc oxide recovery process is prone to introducing impurity ions, affecting the purity of zinc oxide.
Method used
The method of producing active zinc oxide is adopted to produce active zinc oxide by grinding the zinc-containing furnace tailslag and soaking it in a sulfuric acid solution, and then adding a mixed solution of dodecylbenzenesulfonic acid and hydrogen peroxide. After stirring and heating, a precipitant is formed and treated by sodium carbonate, and finally decomposing it through calcination to form active zinc oxide.
Benefits of technology
The purity of zinc oxide is improved, the requirements of high-purity active zinc oxide are met, and the content of impurities in the product is further reduced by introducing a new precipitant.
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Abstract
The present invention discloses a method for producing active zinc oxide by a wet process, comprising the following steps: (1) leaching zinc-containing furnace tailings in a sulfuric acid solution to obtain a leachate; (2) oxidizing ferrous ions to form ferric ions; (3) preparing a precipitant; removing impurities to obtain a zinc-containing liquid; (4) adding sodium carbonate to the zinc-containing liquid to obtain a basic zinc carbonate precipitate, separating the solid from the liquid, and then calcining and decomposing to generate the active zinc oxide. The product zinc oxide obtained by the method of the present invention has a high purity and meets the requirements for high-purity active zinc oxide. The present invention introduces a new precipitant on the basis of a traditional zinc powder reduction and impurity removal process, thereby further reducing the content of impurity elements in the product.
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