Method for comprehensive recovery of lead and tin from alkaline refining slag of lead

A refining slag and alkaline technology, applied in the field of tin and lead comprehensive recovery, can solve the problems of waste of resources, difficult to recycle, increase the difficulty of tin removal, etc., and achieve the effect of reducing the difficulty and improving the purity.
CN101768668AActive Publication Date: 2010-07-07ZHUZHOU SMELTER GRP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHUZHOU SMELTER GRP
Publication Date
2010-07-07

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Abstract

The invention relates to a method for comprehensive recovery of lead and tin from alkaline refining slag of lead, comprising the following steps: 1. oxidizing roasting: oxidizing roasting is carried out on the alkaline refining slag of lead for 2-6h at 300-500 DEG C;2. leaching: nitric acid leaching is carried out on roasted slag, the roasted slag is filtered and separated to obtain lead nitrate solution and zinc slag;3. synthesis: lead nitrate solution is precipitated by sodium hydroxide solution, pH value is controlled while the solution is continuously stirred, thus generating white lead hydroxide sediment which is filtered, washed and dried to obtain white lead hydroxide powder;4. calcination: the white lead hydroxide powder is calcinated to obtain yellow powder yellow lead, namely PbO powder. With the method, lead and tin in the alkaline refining slag of lead are effectively recovered and tin can be ploughed in the lead system; in addition, the method has the advantages of reliable technology and high comprehensive recovery rate.
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Description

technical field

[0001] The invention relates to a method for recycling metal smelting by-products, in particular to a method for comprehensively recovering lead and tin from metallic lead smelting by-products - alkaline refining slag. Background technique

[0002] In the process of metal lead smelting, tin is generally removed by alkaline refining, and the lead alkaline refining slag produced in the process of lead alkaline refining and tin removal contains valuable metals such as tin and lead. This lead alkaline refining slag contains tin It can reach 6-7%, and the lead content is more than 80%, which has a high recovery value. In the prior art, the tin contained in the lead alkaline refining slag has become an impurity, part of which is transferred to the smoke dust during the lead smelting process and is difficult to recycle, and the other part enters the crude lead and continues to be recycled in the lead smelting system . Therefore, the tin in the above-mentioned lead...

Claims

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