Method for directly producing copper alloy from scrap copper

A technology of waste miscellaneous copper and copper alloy, which is applied in the field of metallurgy and can solve problems such as environmental pollution

Active Publication Date: 2017-01-25
NINGBO CHANGZHEN COPPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method for directly producing copper alloys from waste miscellaneous copper in view of the current situation of the prior art, and at the same time solve the problem of environmental pollution in the production process and solve the problem of regeneration and recycling of waste solids, waste gas and waste water

Method used

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  • Method for directly producing copper alloy from scrap copper
  • Method for directly producing copper alloy from scrap copper
  • Method for directly producing copper alloy from scrap copper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The ingredients are shown in Table 1.

[0072] Table 1

[0073]

[0074] According to raw materials. The above ratio can be adjusted flexibly.

[0075] The materials are sent to the melting furnace according to the ratio. The melting furnace in this embodiment is a double-body parallel melting furnace. One of the furnaces is used for feeding and melting, and the other furnace is used for refining and composition control. The casting rhythm supplies copper water to the holding furnace. Refining methods include raw material self-reaction refining and slag cleaning refining. According to the analysis of the melt composition, the elements exceeding the standard are subjected to flux removal and refining. The melting temperature is 1010-1080°C. After the chemical composition analysis in front of the furnace is qualified, it is transferred to the holding furnace for heat preservation. The heat preservation temperature is the same as the casting temperature. The ingot o...

Embodiment 2

[0088] The recipe is shown in Table 2.

[0089] Table 2

[0090]

[0091] According to the situation of raw materials, the above ratio can be adjusted flexibly.

[0092]After weighing according to the proportion, send it to the melting furnace. The melting temperature is 1000-1080°C; the ingot of Φ86mm is continuously cast horizontally, the casting temperature is 1000-1050°C, the casting speed is 8-18 m / h, and the outlet water temperature is 40-60°C.

[0093] All the other are identical with embodiment 1.

[0094] The ingot passes through the 630-ton extrusion machine production line billet, and the ingot is heated by a stepping and rolling ingot heating furnace, heated by natural gas, and the ingot is heated evenly. The extrusion temperature is 660-740℃, the extrusion speed is 8-18mm / s, the wire is automatically taken up and transposed, the wire billet has no bump defect, and the performance is uniform.

[0095] The extruded wire billet is stretched, annealed, multi-pas...

Embodiment 3

[0103] This embodiment is an example of producing high-precision rods for automatic lathes by direct alloying of scrap copper.

[0104] The recipe is shown in Table 3.

[0105] table 3

[0106]

[0107] The components are sent to the smelting equipment according to the ratio; the smelting equipment adopts smelting furnace, refining furnace, holding furnace group, and the smelting furnace is equipped with a pressing device and a ramming and stirring device. The smelting furnace is used for feeding and smelting, followed by flux refining for slag removal and impurity reduction, and component control. The refining temperature is 1020-1100°C. After the component analysis in front of the furnace is qualified, it is transferred to the holding furnace. The lower part of the holding furnace is equipped with a crystallizer. According to the specifications of the product, the ingots of Φ250mm, Φ195mm, Φ150mm or Φ105 are continuously cast horizontally. The casting temperature is 10...

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Abstract

The invention relates to a method for directly producing copper alloy from scrap copper. The method is characterized by including the steps of a) sorting and removing impurities in the collected scrap copper; b) pretreating the sorted scrap copper; c) matching various scrap copper according to target product compositions; d) conveying the materials to a smelting furnace according to a ratio, smelting and refining; e) subjecting ingots to subsequent thermal processing and cold processing according to product requirements so as to obtain standard copper alloy products; f) subjecting smelting furnace ash to ball milling, and removing iron with strong magnets to obtain elutriation sand; g) collecting dust generated in the whole technological process, carrying out four-stage dust removal with dust emission concentration at an exhaust outlet being 60 mg / m<3>, and using the collected smelting dust as a zinc and copper smelting material; h) collecting wastewater in the production process, purifying the wastewater, and using purified water as circulating water in the scrap copper production process. An environment-friendly closed-loop scrap copper recycling system is provided in the method.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for directly producing copper alloys from scrap copper. Background technique [0002] Copper is the oldest metal. Because of its excellent physical properties, mechanical properties, easy formability, and corrosion resistance, copper alloys occupy an important position in the history of human development. After mining and smelting, copper ore is manufactured into copper alloys for various purposes, and is used in various industries and various occasions. Due to the corrosion resistance of copper and copper alloys, they are retained in the form of scrap copper after their service ends. Come down and be another resource. [0003] Some waste copper is easy to separate and identify, such as waste cables and wires, and some waste copper is not evenly mixed like minerals, but it is also difficult to separate, and it is combined with other metals or non-metals, and the same part is u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C9/04C25C1/16C25C1/12C22B7/02C22B19/30
CPCC22B7/02C22B15/00C22B19/30C22C1/02C22C9/04C25C1/12C25C1/16Y02P10/20
Inventor 宋长洪宋卡迪郭淑梅
Owner NINGBO CHANGZHEN COPPER CO LTD
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