High Cu-RE interalloy refining agent for refining scrap copper and preparation and application thereof

A technology with high rare earth content and master alloy, applied in the field of new materials, can solve the problems of rare earth burning, difficulty in mastering the method and amount of addition, increasing the complexity of the process and production cost, and achieving easy batching and not easy secondary pollution. , The effect of reducing the burning rate of rare earth

Inactive Publication Date: 2009-08-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, since rare earth is a kind of very active element, it is easy to oxidize and burn in the air. Therefore, it is often difficult to grasp the addition method and amount when refining and applying, and it often fails to reflect the obvious effect due to the serious burning loss of rare earth. Refining effects, thereby increasing process complexity and production costs

Method used

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  • High Cu-RE interalloy refining agent for refining scrap copper and preparation and application thereof
  • High Cu-RE interalloy refining agent for refining scrap copper and preparation and application thereof
  • High Cu-RE interalloy refining agent for refining scrap copper and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of Refining Agent for Cu-RE Master Alloy

[0043] Prepare raw materials according to the batching scheme in Table 1, and prepare Cu-RE master alloy by vacuum melting technology, and the melting temperature is 1150-1250 °C; during smelting, electrolytic copper is first added, and after melting, rare earth is added to the copper melt by encapsulation with pure copper tubes; After standing still and removing slag, pour it into a block sample in an iron mold. Such as figure 1 Shown, through X-ray diffraction analysis, the rare earth element La and Ce in the Cu-RE master alloy refining agent of the present invention are mainly in the form of compound LaCu 6 、CeCu 6 、LaCu 4 、LaCu 13 A series of intermediate compounds exist in the form.

Embodiment 2

[0045] Application of Cu-RE Master Alloy Refining Agent in Scrap Copper

[0046] The high rare earth content Cu-RE master alloy refining agent of the present invention is applied to the remelting and refining of red miscellaneous copper such as waste wires and waste air-conditioning pipes. The addition amount is only 2-6g / kg melt, and good refining and metamorphic effects are obtained. Realized the direct recycling of red copper. Such as figure 2 Shown is the slagging situation during the remelting refining experiment.

[0047] Depend on figure 2 It can be seen that the red copper without this refining agent produces very little slag during the smelting process, so the remelting is not sufficient for the slag removal of the melt; while the red copper added with the rare earth refining agent of the intermediate alloy produces little slag. A large amount of slag greatly reduces the content of impurity elements in the copper melt, showing an obvious refining effect.

[0048...

Embodiment 3

[0053] Cu-RE Master Alloy Refining Agent Applied to Industrial Production of White Copper Tubes

[0054] The Cu-RE master alloy refining agent of the present invention is applied to the industrial production of white copper tubes of a certain domestic enterprise. Add 50-70% of Cu-Ni-Fe (white copper) process waste during smelting, and add a proper amount of rare earth to the refining and modification of the white copper melt to reduce harmful impurities in the white copper, purify the grain boundaries, refine the grains, and improve Thermoplasticity of cupronickel alloy; combined with micro-alloying of rare earth in copper alloy to improve its corrosion resistance. After semi-continuous casting, peeling extrusion with large extrusion ratio on a large-tonnage extruder, and then cold-rolled with a large deformation rate, on-line bright annealing, and high-speed inverted disc stretching, the cupronickel condensing coil was successfully produced. Similarly, through rare earth ref...

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Abstract

The invention relates to a high Cu-RE refining agent which has high efficiency and low burning loss rate and can be used for copper and copper alloy, applied to mass refining of the copper and the copper alloy, especially applied to refining and modification of red impure copper and white impure copper. The Cu-RE interalloy refining agent is prepared by a vacuum melting method, wherein, rare earth content is up to 30-65%; and only 2-6g/kg refining agent is added while the Cu-RE interalloy refining agent is applied to remelting refining of scrap copper. The Cu-RE refining agent enhances slagging and deslagging of copper fused mass, reduces deleterious substances in the fused mass of the scrap copper, and improves texture and performance of the copper and the copper alloy, therefore, products prepared from the red impure copper as a raw material reach or exceed the quality of the products prepared from electrolytic copper as a raw material, and the white copper process waste can be used for directly producing high-quality products after remelting refined, thus promoting recycle and reutilization of the scrap copper, saving energy and resource, reducing environmental pollution and generating significant economic and social benefits.

Description

technical field [0001] The invention belongs to the field of new materials. The invention relates to an intermediate alloy refining agent with high rare earth content for refining waste miscellaneous copper and its preparation and application, which can be used for waste miscellaneous copper refining, and effectively improve the mechanical properties and corrosion resistance of copper and copper alloys. Background technique [0002] China is the largest consumer of copper processing materials. In 2005, the consumption of copper processing materials has exceeded 5 million tons. During the "Tenth Five-Year Plan" period, the consumption of copper processing materials increased by an average of 17.9%, ranking first in the world. However, my country is a copper-poor country, and the serious shortage of copper resources restricts the development of my country's copper industry. Therefore, the recovery, refining and reuse technology of scrap copper in my country is particularly i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/10C22B15/14C22C9/00C22C28/00C22C1/02
Inventor 林高用万迎春唐鹏钧杨伟张振峰张胜华
Owner CENT SOUTH UNIV
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