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Production technology for continuous casting and rolling of scrap copper

A technology of continuous casting and rolling and production process, which is applied in the production process of waste copper continuous casting and rolling, which can solve the problems of insufficient brightness and smoothness of the surface of copper rods, unenvironmental protection of smelting emissions, and low refining purity, etc., to achieve good economy Benefits, good comprehensive mechanical properties and electrical properties, and low energy consumption

Inactive Publication Date: 2016-12-07
JIANGXI ANXUN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of excessive air bubbles generated in the copper liquid during the refining process, low refining purity, too many surface defects when casting billets, insufficient brightness and smoothness of the copper rod surface, and unenvironmental protection of smelting emissions, the present invention aims to solve the problems The technical problem is to provide a continuous casting and rolling production process for purifying waste copper by using cerium-rich and yttrium-rich mixed rare earths, and improving the surface of copper rods through emulsion, hydrochloric acid and ethanol solutions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A. Scrap copper sorting, batching into the furnace: send 0.8 tons of 1# bright copper scrap and 6.4 tons of 2# red miscellaneous copper to the metal grinder and grind it into copper powder. The diameter of the copper powder is 0.01mm, and the copper powder is collected to the stuffing tank;

[0033] B. Reverberatory furnace melting: Add 7.18 tons of copper powder collected into the reverberatory furnace, use natural gas as fuel, set the air-fuel ratio to 15:1, and when heated to 1120°C, stir the copper liquid for 0.1h at a stirring speed of 800r / h , then add 0.718Kg of cerium-rich mixed rare earth through the feeding door of the reverberatory furnace, continue stirring for 0.5h, the stirring speed is 1000r / h, and continue to heat to 1200°C, add 1.077Kg of yttrium-rich mixed rare earth, continue stirring for 0.5h, the stirring speed It is 1000r / h, and the tail gas generated during melting reaches the international second-class emission standard after passing through the ...

Embodiment 2

[0044] A. Scrap copper sorting, batching into the furnace: Send 0.8 tons of 1# bright scrap copper and 8 tons of 2# red miscellaneous copper to the metal grinder and grind it into copper powder. The diameter of the copper powder is 0.01mm, and the copper powder is collected to the stuffing tank;

[0045] B. Reverberatory furnace melting: Add 8.77 tons of copper powder collected into the reverberatory furnace, use natural gas as fuel, set the air-fuel ratio to 20:1, and when heated to 1180°C, stir the copper liquid for 0.3h at a stirring speed of 800- 1000r / h, then add 1.754Kg of cerium-rich mixed rare earth through the feeding door of the reverberatory furnace, continue to stir for 1h, the stirring speed is 1200r / h, and continue to heat to 1280°C, add 2.193Kg of yttrium-rich mixed rare earth, continue to stir for 1h, stir The speed is 1200r / h, and the tail gas generated during melting reaches the international Class II emission standard after passing through the environmental ...

Embodiment 3

[0056] A. Scrap copper sorting, batching into the furnace: Send 0.8 tons of 1# bright copper scrap and 7.2 tons of 2# red miscellaneous copper to the metal grinder and grind it into copper powder. The diameter of the copper powder is 0.01mm, and the copper powder is collected to the stuffing tank;

[0057] B. Reverberatory furnace melting: add 7.98 tons of copper powder collected into the reverberatory furnace, use natural gas as fuel, set the air-fuel ratio to 17:1, and when heated to 1160°C, stir the copper liquid for 0.2h at a stirring speed of 900r / h, then add cerium-rich mixed rare earth 160ppm through the reverberatory furnace feeding door, continue to stir for 0.8h, and the stirring speed is 1100r / h, and then continue to heat to 1250°C, add 200ppm of yttrium-rich mixed rare earth, continue to stir for 0.8h, and the stirring speed is 1100r / h, the tail gas generated during melting reaches the international Class II emission standard after passing through the environmenta...

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Abstract

The invention belongs to the scrap metal casting technology and relates to production technology for continuous casting and rolling of scrap copper. In order to overcome shortcomings that melted copper generates too many air bubbles, refining purity is not high, too much surface detect during blank casting, radiance and smoothness of the surface of a copper bar are not enough and smelting emissions are not environment friendly during refining, the production technology includes that cerium-rich and yttrium-rich mixed rare earth is adopted to remove oxygen and sulfur from the melted copper, meanwhile, many other impurity elements can also be restored and removed, copper casting organization is obviously improved by adding the rare earth, all performance indexes of the copper bar are improved by the aid of emulsion, hydrochloric acid and an ethanol solution in sequence in order to further improve the radiance and smoothness of the surface of the copper bar, and quality of the copper bar is obviously improved. Through scientific and reasonable technology design, the copper bar good high in purity and good in quality is manufactured, and exhaust gas generated reach international II emission standards though an environment friendly dust removal device.

Description

technical field [0001] The invention belongs to the technical field of waste metal recasting, and in particular relates to a production process of continuous casting and rolling of waste copper. Background technique [0002] There are many types of scrap copper, and the recycling technologies and processes are also different. When recycling, the mixed scrap copper is generally classified, and some other metals are selected out. In addition, other wastes mixed with machinery are also selected to remove them. Oil stains on the surface of scrap copper, etc., finally get scrap copper with a single variety, which provides excellent raw materials for smelting, thereby simplifying the smelting process. There are also many ways to recycle scrap copper. Generally, high-quality scrap copper is directly smelted into refined copper or copper alloy, or the metal in scrap copper is removed by smelting, and it is cast into an anode plate, which is then obtained by electrolysis. Electrolyt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/00C22B9/10B21B1/46
CPCB21B1/46C22B15/006Y02P10/20
Inventor 胡国仁
Owner JIANGXI ANXUN IND
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