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
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 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
一种炼钢尘泥回收锌用内外双腔式转底炉，属于含锌铁固废的回收领域，炉墙内设置多个燃烧喷嘴，环绕炉墙的侧壁设有带传送辊道的预热腔，炉墙的顶部设有与预热腔连通的烟气输送管；回转底盘的中心设置有固定筒，固定筒内部形成与烟气输送管连通的烟气汇流道，回转底盘的表面形成交错排布的烧结腔和蓄热区。本发明采用转底炉代替回转炉，使原料不需要经过制作成专门的球团即可参与烧结，并且利用烧结的烟气对料坯进行预热，不仅降低了烧结球团所导致的能耗，而且有效利用了烟气的余热。
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