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Cold bed electron beam smelting method for high-purity nickel ingot

An electron beam smelting and electron beam furnace technology is applied in the field of cold bed electron beam smelting of high-purity nickel ingots to achieve the effects of time saving, smelting cost saving and midway pollution avoidance.

Inactive Publication Date: 2021-04-06
宁波创润新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies in the prior art, provide a cooling bed electron beam smelting method for high-purity nickel ingots, solve the problem of internal defects encountered in the smelting process of nickel ingots, and improve the product qualification rate and production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides a cooling bed electron beam smelting method for high-purity nickel ingots, comprising the following steps:

[0030] S1. Select an electrolytic nickel plate with a purity of 99.95% as a raw material. After polishing the high-purity electrolytic nickel plate, clean it with a cleaning solution and dry it in a vacuum drying oven. The cleaning solution contains dilute sulfuric acid. Clean the oxide film and dirt on the surface of the electrolytic nickel plate to prevent the introduction of pollutants from affecting the product quality. After recording the weight of the high-purity electrolytic nickel plate, put it into the bin of the electron beam furnace and fix it in an orderly manner. And vacuumize the electron beam furnace;

[0031] S2. Preheat the electron gun and add a power of 350KW. After the electron gun is stable, start the pushing mechanism, and push the high-purity electrolytic nickel plates in the silo fixed in step S1 into the cooling b...

Embodiment 2

[0034] This embodiment provides a cooling bed electron beam smelting method for high-purity nickel ingots, comprising the following steps:

[0035] S1. Select an electrolytic nickel plate with a purity of 99.95% as a raw material. After polishing the high-purity electrolytic nickel plate, clean it with a cleaning solution and dry it in a vacuum drying oven. The cleaning solution contains dilute sulfuric acid. Clean the oxide film and dirt on the surface of the electrolytic nickel plate to prevent the introduction of pollutants from affecting the product quality. After recording the weight of the high-purity electrolytic nickel plate, put it into the bin of the electron beam furnace and fix it in an orderly manner. And vacuumize the electron beam furnace;

[0036] S2. Preheat the electron gun and add a power of 380KW. After the electron gun is stable, start the pushing mechanism, and push the high-purity electrolytic nickel plates in the silo fixed in step S1 into the cooling b...

Embodiment 3

[0039] This embodiment provides a cooling bed electron beam smelting method for high-purity nickel ingots, comprising the following steps:

[0040] S1. Select an electrolytic nickel plate with a purity of 99.95% as a raw material. After polishing the high-purity electrolytic nickel plate, clean it with a cleaning solution and dry it in a vacuum drying oven. The cleaning solution contains dilute sulfuric acid. Clean the oxide film and dirt on the surface of the electrolytic nickel plate to prevent the introduction of pollutants from affecting the product quality. After recording the weight of the high-purity electrolytic nickel plate, put it into the bin of the electron beam furnace and fix it in an orderly manner. And vacuumize the electron beam furnace;

[0041] S2. Preheat the electron gun and add power to 400KW. After the electron gun is stable, start the pushing mechanism, and push the high-purity electrolytic nickel plates in the silo fixed in step S1 into the cooling bed...

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Abstract

The invention discloses a cold bed electron beam smelting method for a high-purity nickel ingot. The method comprises the following steps: S1, selecting a high-purity electrolytic nickel plate as a raw material, polishing, cleaning with a cleaning solution, drying, recording the weight, sequentially loading into a bin of an electron beam furnace, fixing, and vacuumizing the electron beam furnace; S2, preheating an electron gun, increasing power, starting a pushing mechanism after the electron gun is stabilized, sequentially pushing the high-purity electrolytic nickel plate fixed in the bin in the step S1 into a cold bed for complete melting to form nickel melt, keeping the nickel melt staying on the cold bed for 24 minutes, and after the nickel melt is fully deflated, enabling the nickel melt to flow into an ingot casting crucible to prepare a nickel ingot; and S3, switching off the electron gun and the vacuum system sequentially, opening the electron beam furnace, and taking the nickel ingot prepared in the step S2 out. According to the method, the problem of internal defects of the nickel ingot in the smelting process is solved, and the product percent of pass and the production efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to a cooling bed electron beam smelting method for high-purity nickel ingots. Background technique [0002] High-purity nickel ingots are important raw materials for sputtering nickel targets for semiconductors, and are mainly used as coating materials for integrated circuits and microelectronic thin film materials. [0003] At present, the commonly used method is to use the secondary smelting of nickel ingots. The nickel ingots obtained by electron beam secondary smelting can remove most of the defects inside the ingot, but the cost of secondary smelting is relatively high, the smelting time is long, and the efficiency is low. Moreover, nickel ingots need to be reprocessed after being released from the furnace, and new pollution is easily introduced by lifting and installation, and the product quality is not easy to maintain stability. Contents of the invention [0004] T...

Claims

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Application Information

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IPC IPC(8): C22B9/22C22B23/06
CPCC22B9/228C22B23/06
Inventor 吴景晖杜全国李东侠雷孝吕宋彦明姚力军
Owner 宁波创润新材料有限公司
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