A kind of refining method of scrap copper containing tin and lead

Abstract

The invention relates to a refining method of tin-lead contained scrap copper, and belongs to the technical field of reclaimed copper refining. The content of copper in the scrap copper raw material ranges from 80 to 90%, the content of tin-lead ranges from 6 to 10%, and a main treatment process comprises sorting pre-treatment, shearing, mixing, and controlled pressure high-temperature treatment.The scrap copper raw material is firstly subjected to sorting pre-treatment, a shearing machine is used for shearing, copper chloride is added in a high-temperature vacuum furnace for treatment underthe controlled-pressure condition that the pressure ranges from 0.01 to 0.8 atm at the temperature of 700 to 1100 DEG C, volatile matter is subjected to two-segment cooling, lead chloride and tin chloride are obtained, the tin-lead impurity content in the treated scrap copper can be greatly reduced, and the aim of purifying reclaimed copper is achieved.

Description

technical field

[0001] The invention belongs to the technical field of secondary copper refining, and in particular relates to a refining method of scrap copper containing tin and lead.

[0002] technical background

[0003] Commonly used copper alloys include brass, bronze, and white copper. However, in order to meet different effects during use, the three types of copper alloys are often doped with other elements to improve the different properties of the alloy. With the end of the service life of copper alloys, and in order to alleviate the contradiction between the consumption and production of copper resources in my country, the proportion of scrap copper recycling is becoming more and more obvious. Because of the diversity of elements in the copper alloy, the complexity of the elements in the recycled raw materials is caused, which contains a grade of copper of 80-90% and a content of lead and tin of 6-10%. Due to the high content of lead and tin in the raw material, t...