Automatic secondary feeding method for rare earth alloy smelting

A secondary feeding, rare earth alloy technology, applied in lighting and heating equipment, furnace types, furnaces, etc., can solve the problems of alloy liquid sputtering, potential safety hazards, oxygen leakage, etc., to improve work efficiency, reduce volatilization and composition the effect of fluctuations

Inactive Publication Date: 2021-05-07
ZHEJIANG INNUOVO MAGNETICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The feeding method in the prior art needs to be input through the mechanism. On the one hand, the action of the mechanism is easy to cause oxygen leakage, which increases the complexity of the operation;

Method used

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  • Automatic secondary feeding method for rare earth alloy smelting
  • Automatic secondary feeding method for rare earth alloy smelting
  • Automatic secondary feeding method for rare earth alloy smelting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] In the raw material preparation process: prepare Nd with a purity of 99.5% 75 PR 25 , Dy with a purity of 99.8%, Fe-B for industrial use, pure Fe and Co for industrial use, Cu and Al with a purity of 99.5% and Ga with a purity of 99.999%, and ZrFe for industrial use, prepared in ten parts by weight percent wt%. The contents of each element are shown in Table 1:

[0024] Table 1: The content of each element of embodiment and comparative example

[0025]

[0026] Among them, five parts were used as comparative examples by conventional methods, directly put into alumina crucibles, smelted in a high-frequency vacuum induction melting furnace, refined at 1500 ° C for 5 minutes, and then adjusted the heating power to cool down to 1430 ° C, using Casting is carried out by a single-roll quenching method to obtain strip strips. At room temperature, put the spin strip into the hydrogen blasting furnace and pass in hydrogen gas with a purity of 99.5%. After absorbing hydroge...

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Abstract

The invention discloses an automatic secondary feeding method for rare earth alloy smelting. According to the method, firstly, raw materials such as iron and the like, having the melting point far higher than that of rare earth, in a rare earth alloy are made into a secondary feeding container; raw materials such as rare earth and the like are placed into the secondary feeding container, and the raw materials and the secondary feeding container are placed into a crucible; meanwhile, other required raw materials are also directly placed into the crucible; and finally, all the raw materials are smelted in the crucible, and after the secondary feeding container is melted, rare earth falls into molten metal in the crucible, and secondary feeding is achieved. According to the method, volatilization and fluctuation of components are reduced, and the working efficiency during crucible charging is improved; and assistance of other mechanisms is not needed, and the effect of secondary feeding is achieved through one-time feeding essentially.

Description

technical field [0001] The invention belongs to the field of rare earth alloy manufacturing, and in particular relates to an automatic secondary feeding method for rare earth alloy smelting. Background technique [0002] When NdFeB is smelted, all raw materials are generally put into the crucible at the same time for smelting. Rare earths have low melting points and are volatile, so there will be greater losses. There are also manufacturers that use a secondary feeding mechanism to add rare earths such as praseodymium and neodymium into the molten metal from the top of the crucible after other raw materials such as iron are melted. The feeding method of the prior art needs to be input through the mechanism. On the one hand, the action of the mechanism can easily lead to oxygen leakage, which increases the complexity of the operation; Contents of the invention [0003] The object of the present invention is to provide an automatic secondary feeding method for rare earth a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C22C38/00F27B14/16
CPCC22C33/04C22C38/002C22C38/005F27B14/0806
Inventor 魏中华赵栋梁张斌洪付松何杰杰黄风
Owner ZHEJIANG INNUOVO MAGNETICS
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