Copper refining reducing agent

Abstract

The invention discloses a copper refining reducing agent and belongs to the technical field of reclaimed copper refining. The copper refining reducing agent is composed of wood sawing flour and carbon powder. According to the copper refining reducing agent, the resource utilization rate is high, the production cost is reduced by 60% or more, the labor intensity is greatly reduced, wood with the large size and weight does not need to be carried, the reducing efficiency is high, reducing time is shortened by 70% or more, reduction is thorough, no dead corner is produced during reduction, product quality is greatly improved, almost no waste or waste gas is produced, and environmental pollution is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of secondary copper refining, in particular to a reducing agent for copper refining. Background technique [0002] The main technological process of secondary copper refining is: melting-oxidation-slag removal-reduction, in which the reduction process is mainly to control the oxygen content in the copper liquid, which is an important link to determine the product quality [0003] The traditional recycled copper refining and reduction process uses "wood insertion reduction", that is, the process of inserting trees into copper liquid for reduction. [0004] The reaction principle is: C+CuO 2 =CO 2 +Cu, [0005] Using this method, each furnace of copper consumes more than 10 tons of trees on average, and due to reasons such as tree size and time, the part of the tree that is not inserted into the copper liquid is discarded as waste. Due to the high temperature in the furnace, 80% of the whole tree is burnin...

AI Technical Summary

Problems solved by technology

Due to the high temperature in the furnace, 80% of the whole tree is burning, and the part used for oxygen reduction in the copper liquid is less than 20% (the part inserted into the copper liquid), and the rest reacts with the oxygen in the air to generate carbon dioxide and Carbon monoxide and other gases escape the refining furnace, and the whole reaction is in an open environment, the utilization rate of trees is low, and the exhaust gas emission is large;

[0006] In addition, since the trees are fixed at the charging port, the reduction reaction is mainly near the center line of the furnace door at the charging port, and there is a reaction dead angle;

[0007] At present, due to the poor sealing of the refining furnace and the copper liquid flow tank, the air enters and reacts with the copper liquid, thereby increasing the oxygen content in the copper liquid

In the traditional production, the wood insertion reduction method is adopted, that is, the trees are inserted into the copper liquid, and the oxygen in the copper liquid is reduced and deoxidized. In this reduction method, only less than 20% of the trees participate in the reduction, and the remaining 80% of the trees are not immersed in copper. The liquid can not participate in the reduction, and the gas such as carbon monoxide and carbon dioxide escapes from the refining furnace, resulting in the disadvantages of low reduction efficiency, high labor intensity, high production cost, and environmental pollution by exhaust gas emissions.