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Preparation method for producing cupronickel B30 raw material from copper-nickel slag

A technology of copper-nickel slag and B30, applied in the field of smelting, can solve the problems of incomplete homogenization of elements such as copper-nickel-iron and high cost, and achieve significant environmental protection benefits and low investment

Inactive Publication Date: 2021-08-24
金川镍钴研究设计院有限责任公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is aimed at the disadvantages of high raw material cost of cupronickel B30 alloy in the prior art and the inability to completely homogenize elements such as copper-nickel-iron. The purpose of the present invention is to provide a preparation of copper-nickel slag to produce cupronickel B30 raw material The method is to develop a low-cost production method for the production of white copper B30 by using direct current electric arc furnace reduction smelting for the smelting intermediate materials containing copper and nickel valuable metals, and to solve the problem of maximizing the recovery and utilization of valuable metals

Method used

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  • Preparation method for producing cupronickel B30 raw material from copper-nickel slag
  • Preparation method for producing cupronickel B30 raw material from copper-nickel slag
  • Preparation method for producing cupronickel B30 raw material from copper-nickel slag

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preparation example Construction

[0020] A kind of copper-nickel slag produces the preparation method of cupronickel B30 raw material, and its technological process is:

[0021] a. Crush the copper-nickel slag material to about 50mm, and the water content after drying is less than 10%;

[0022] b. Mix the dried copper-nickel slag material, reducing agent and flux in proportion and then add them to the DC electric arc furnace;

[0023] c. Control the temperature of the DC electric arc furnace at 1380°C-1500°C, the feeding time is 30-60 minutes, the holding time is 30-60 minutes, and the slag and copper-nickel alloy are separated;

[0024] d. Copper-nickel alloy is desulfurized, decarburized, and impurity-removed through AOD furnace and other equipment to prepare qualified white copper B30 raw materials.

[0025] Further, the amount of the reducing agent added in step b is 5-7.5% of the copper-nickel slag on a dry basis.

[0026] Further, the amount of flux added in step b is 13-15% of the dry copper-nickel sl...

Embodiment 1

[0031] First, after the copper-nickel slag is naturally dried, its water content is less than 10%, and a certain amount of dry base copper-nickel slag is weighed, and the reducing agent is weighed according to 5% of the copper-nickel slag amount, and the auxiliary agent is weighed according to 13% of the copper-nickel slag amount. Flux: All materials are weighed and mixed in a small amount and added to the hot DC electric arc furnace in batches. The melting temperature of the DC electric arc furnace is controlled at 1380°C, the feeding time is 30 minutes, and the holding time is 30 minutes. After the holding is completed, the slag and copper-nickel alloy are separated. The copper-nickel alloy is transported to the AOD furnace; the desulfurizer is weighed according to 1% of the alloy amount; the oxygen blowing decarburization, desulfurization by adding the desulfurizer in batches, etc. are refined, after the impurity removal is completed, the casting is carried out, and the chemi...

Embodiment 2

[0035] First, after the copper-nickel slag is naturally dried, its water content is less than 10%, and a certain amount of dry base copper-nickel slag is weighed, and the reducing agent is weighed according to 6% of the copper-nickel slag amount, and the auxiliary agent is weighed according to 14% of the copper-nickel slag amount. Flux: All materials are weighed and mixed in a small amount and added to the hot DC electric arc furnace in batches. The melting temperature of the DC electric arc furnace is controlled at 1450°C, the feeding time is 50 minutes, and the holding time is 50 minutes. After the holding, the slag and copper-nickel alloy are separated. The copper-nickel alloy is transported to the AOD furnace; the desulfurization agent is weighed according to 1% of the alloy amount; oxygen blowing decarburization, adding desulfurization agent in batches for desulfurization and other refining, casting after impurity removal, cooling sampling chemical composition analysis, the...

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Abstract

The invention discloses a preparation method for producing a cupronickel B30 raw material from copper-nickel slag. A direct current electric arc furnace is adopted for smelting, a fluxing agent and a reducing agent are added into a copper-nickel slag nonferrous smelting intermediate material to produce a copper-nickel alloy, a qualified raw material for preparing the cupronickel B30 is produced through refining and impurity removal, and chemical components of the qualified raw material meet the requirement of GB / T5231-2012 for processing cupronickel B30 chemical components. According to the method, the problems of valuable metal loss, energy loss and the like are solved, and meanwhile, the cupronickel B30 alloy can be industrially applied more widely. The direct-current electric arc furnace is adopted for reduction smelting and slagging, the copper-nickel alloy is subjected to refining and impurity removal treatment to produce the raw materials meeting the requirement for producing the cupronickel B30 alloy, the method is short in process, low in energy consumption and high in recovery rate, the cost for producing the copper-nickel alloy can be greatly reduced, and the method is a novel technology for comprehensively developing and utilizing nonferrous smelting slag and developing the low-cost preparation of the cupronickel B30 alloy. The cupronickel B30 alloy has important significance in wider industrial application in the fields of shipbuilding, electric power, chemical engineering and the like.

Description

technical field [0001] The invention relates to the technical field of smelting, and also to the technical field of resource recovery of valuable metals through open-circuit processing of non-ferrous smelting intermediate materials, in particular to a method for preparing copper-nickel slag to produce white copper B30 raw materials. Background technique [0002] Copper-nickel alloys are widely used in various fields due to their good corrosion resistance, excellent processability and excellent thermal conductivity, such as heat exchangers and condensers in seawater pipelines, desalination plants, power plants and ship hulls. Cupronickel B30 is a copper-based alloy with nickel as the main additive element. It is silvery white with metallic luster, hence the name cupronickel. Copper and nickel can be dissolved in each other to form a continuous solid solution, which is always an α-single-phase alloy. It has good corrosion resistance, medium strength, high plasticity, can be pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B5/10C22B1/02C22B15/00C22B15/14C22B23/02C22B23/06C22C1/02C22C1/06C22C9/06
CPCC22B7/04C22B7/001C22B5/10C22B1/02C22C1/06C22C1/02C22C9/06C22B15/0054C22B15/006C22B15/0052C22B23/02C22B23/06Y02P10/20
Inventor 郑江华马晓东吕清华宗红星张鹏姜海燕吴红星金玉芬高晓婷
Owner 金川镍钴研究设计院有限责任公司
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