Method for recycling tin from tin-containing lead slag

A technology of tin lead and tin chloride, applied in the field of solid waste recycling, can solve problems such as environmental pollution and resource waste, and achieve the effect of simple and controllable process
CN110872649AActive Publication Date: 2020-03-10HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2020-03-10

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Abstract

The invention belongs to the field of solid waste recycling, and particularly relates to a method for recycling tin from tin-containing lead slag. According to the method for recycling tin from tin-containing lead slag, a sodium stannate product is prepared through a chlorination-water leaching-alkali fusion-water leaching-concentration crystallization process, the process is simple and controllable, low-grade tin elements in the tin-containing lead slag can be extracted, and the sodium stannate product is prepared. The prepared sodium stannate product meets the GB / T26040 first-level standard.The tin recycling rate in the process can reach 93.8wt%. The method provides a feasible path for recycling of low-grade tin slag.
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Description

technical field

[0001] The invention belongs to the field of solid waste recycling, and more specifically relates to a method for recovering tin from tin-lead slag. Background technique

[0002] In the pyro-smelting process of waste lead-acid batteries, a large amount of solid waste will be produced, most of which are lead-related hazardous waste. Due to the difference in smelting process and raw materials, the composition of solid waste varies greatly.

[0003] During the smelting process of the scrap alloy grids selected from the dismantling of waste lead-acid batteries, because the grids contain a certain amount of tin elements, lead alloys are obtained during the alloy grid smelting process, but a large amount of lead-containing smelting is also produced. Waste residue, wherein the tin content can reach 10-20wt%. Due to the high tin content in the lead-containing smelting waste slag, which has a strong resource value, secondary lead enterprises generally obtain high-ti...

Claims

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