Tin hard head liquation refining process
By controlling the temperature through stirring in molten lead alloy, the problems of long tin smelting cycle and low yield were solved, achieving efficient tin recovery and impurity separation, and improving tin yield.
CN121992219APending Publication Date: 2026-05-08HENAN YUGUANG GOLD & LEAD
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Patent Information
- Application Number
- CN202511943826.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-22
- Publication Date
- 2026-05-08
AI Technical Summary
Technical Problem
The existing tin hard-tip smelting process suffers from long cycle time and low tin direct recovery rate.
Method used
Solid tin hard tips are added to liquid lead alloy in batches and stirred. The temperature of the liquid lead alloy is controlled at 610-680℃. The low melting point elements in the tin hard tips are dissolved by stirring, and the high melting point impurities float to the surface to form scum. Then, condensation is carried out to remove iron, arsenic and copper. The temperature and stirring time are controlled to ensure the separation of impurities.
Benefits of technology
It shortened the tin smelting cycle by more than 50%, increased the tin yield to 95.14%, reduced the mixing of impurities, and achieved green and efficient tin recycling.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention belongs to the technical field of metallurgical processes, and particularly relates to a tin hard head liquation refining process which comprises the following steps: step 1, adding solid tin hard heads into lead alloy liquid in batches, stirring, controlling the temperature of the lead alloy liquid to be 610-680 DEG C during stirring, stopping stirring after the tin hard heads are granular or powdery, and fishing out dross to obtain crude tin liquid; step 2, performing condensation to remove iron and arsenic; and step 3, removing iron and copper after arsenic is qualified. According to the method, the metal high-temperature liquation technology is adopted, the crude tin is separated out from the tin hard head, the process that in the traditional process, after crushing, the tin slag is matched for secondary furnace feeding is replaced, and the problems that in the traditional process, melting is difficult, the period is long, and the tin yield is low are solved.
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