A double-cavity rotary hearth furnace for recovering zinc from steelmaking dust and sludge
By combining an internal and external dual-cavity rotary hearth furnace with a special mold, the problem of high energy consumption in zinc-containing iron solid waste has been solved, achieving rapid and thorough sintering and efficient zinc recovery.
CN122408441APending Publication Date: 2026-07-17NINGXIA JIANLONG LONGXIANG IRON & STEEL CO LTD +1
Patent Information
- Authority / Receiving Office
- CN Ā· China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NINGXIA JIANLONG LONGXIANG IRON & STEEL CO LTD
- Filing Date
- 2026-06-12
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
In existing technologies, the treatment of zinc-containing iron solid waste requires pre-forming pellets and sintering at high temperatures, resulting in high energy consumption and high treatment costs, as well as incomplete reactions within the pellets.
Method used
The rotary hearth furnace with internal and external cavities is adopted. The sintering flue gas is used to preheat the billet, and the billet and the mold are sintered synchronously through a specially structured mold, which reduces energy consumption and improves sintering efficiency.
Benefits of technology
This method enables rapid and thorough sintering of the billet, reduces energy consumption and simplifies the subsequent iron removal process, while also improving zinc recovery efficiency.
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Figure CN122408441A_ABST
Abstract
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