CN111197137A

CN111197137A - Lanthanum-cerium alloy of rare earth and preparation method thereof

Info

Publication number: CN111197137A
Application number: CN201811365298.0A
Authority: CN
Inventors: 沈广胜
Original assignee: SHANGHAI YONGYE METALLURGICAL TECHNOLOGY DEVELOPMENT CO LTD
Current assignee: SHANGHAI YONGYE METALLURGICAL TECHNOLOGY DEVELOPMENT CO LTD
Priority date: 2018-11-16
Filing date: 2018-11-16
Publication date: 2020-05-26

Abstract

The invention relates to the technical field of alloy, and discloses a preparation method of rare earth lanthanum-cerium alloy, which comprises the following steps of using rare earth La₁₇Ce₄₀The alloy is used as a raw material, and mechanical punch forming is carried out, so that the prepared product contains 12-20 wt% of lanthanum, 35-45 wt% of cerium and 35-45 wt% of iron. The preparation method of the invention has the advantages of no air leakage, no oxidation and no other impurities mixed in the preparation process, thereby ensuring that the calcium-iron alloy punch forming product is purer. Further, rare earth La was used₁₇Ce₄₀The alloy is used as a raw material, so that the yield is improved, the cost is reduced, the purity of the product is improved, and the quality and the performance of steel are guaranteed.

Description

Lanthanum-cerium alloy of rare earth and preparation method thereof

Technical Field

The invention relates to the technical field of alloy, relates to a lanthanum-cerium alloy of rare earth, and also relates to a preparation method of the lanthanum-cerium alloy of rare earth.

Background

At present, common production methods for preparing rare earth lanthanum cerium alloy include a molten salt electrolysis process and a metallothermic reduction method. The technology has the advantages of low recovery rate, high oxygen content, unstable product and easy oxidation, and the reduction temperature of the calcium direct reduction rare earth oxide is high in actual production, so that the production is not facilitated, and the large-scale application of industrial production is restricted.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a rare earth lanthanum-cerium alloy and a preparation method thereof. The invention adopts mechanical punch forming to ensure the compactness, the tightness, the air leakage, the oxidation and the mixing of other metal impurities so as to ensure the purer rare earth alloy. The invention uses rare earth La17Ce40 alloy as raw material, improves the yield, reduces the cost, improves the purity of the product, and ensures the quality and performance of the steel.

In order to solve the technical problem, the invention is solved by the following technical scheme:

the rare earth lanthanum-cerium alloy contains 12-20 wt% of lanthanum, 35-45 wt% of cerium and 35-45 wt% of iron.

Preferably, the lanthanum content is 12-17 wt%, the cerium content is 35-40 wt%, and the iron content is 35-43 wt%.

Preferably, the lanthanum content is 17 wt%, the cerium content is 40 wt%, and the iron content is 43 wt%. The preparation method of rare earth lanthanum-cerium alloy comprises the following steps of using rare earth La₁₇Ce₄₀Alloy is used as raw material, rare earth La is added₁₇Ce₄₀The alloy is put into a box with a cover and is mechanically punched and molded, and the prepared product contains 12 to 20 weight percent of lanthanum, 35 to 45 weight percent of cerium and 35 to 45 weight percent of iron. Mixing rare earth La₁₇Ce₄₀The alloy is put into a box with a cover to ensure the compactness and the tightness, no air leakage, no oxidation and no mixing of other metal impurities to ensure that the rare earth alloy is purer.

Preferably, the material of the lidded box is low carbon aluminum killed steel. The low carbon aluminum killed steel is Spcc. The box with the cover is a rectangular box body.

Preferably, the mechanical press molding is performed by a press machine of 25 tons.

Preferably, a die is provided on a press used for the press.

Preferably, the product has a lanthanum content of 12-17 wt%, a cerium content of 35-40 wt% and an iron content of 35-43 wt%.

Preferably, the product is obtained with a lanthanum content of 17 wt.%, a cerium content of 40 wt.% and an iron content of 43 wt.%.

The invention adopts mechanical punch forming to ensure compactness, tightness, no air leakage, no oxidation and no other metal impurities to ensure that the rare earth alloy is purer. Further, rare earth La was used₁₇Ce₄₀The alloy is used as a raw material, so that the yield is improved, the cost is reduced, the purity of the product is improved, and the quality and the performance of steel are guaranteed.

The product prepared by the preparation method of the invention achieves higher product quality performance.

Detailed Description

The present invention will be described in further detail with reference to examples.

Example 1

The preparation method of the lanthanum-cerium alloy of rare earth comprises the following steps of using rare earth La₁₇Ce₄₀Alloy is used as raw material, rare earth La is added₁₇Ce₄₀The alloy is put into a box with a cover and is mechanically punched and molded, and the lanthanum content, the cerium content and the iron content of the prepared product are respectively 17 wt%, 40 wt% and 43 wt%. The mass of the added pure cerium before the experiment can be obtained by utilizing the mass of the added cerium fluoride in the experiment and according to the mass conservation, so that the recovery rate of the cerium is calculated to be 97%.

The box with the cover is made of low-carbon aluminum killed steel. When the mechanical press forming is performed, a 25-ton press is used for pressing. The punching machine for punching is provided with a die.

Example 2

The preparation method of the lanthanum-cerium alloy of rare earth comprises the following steps of using rare earth La₁₇Ce₄₀Alloy is used as raw material, rare earth La is added₁₇Ce₄₀The alloy is put into a box with a cover and is mechanically punched and molded, and the lanthanum content, the cerium content and the iron content of the prepared product are respectively 12 wt%, 35 wt% and 35 wt%. The mass of the lanthanum fluoride added in the experiment can be used for obtaining the mass of the pure lanthanum added before the experiment according to the mass conservation, so that the recovery rate of the lanthanum is calculated to be 95%.

The material of the lidded box was low carbon aluminum killed steel (i.e., spcc). When the mechanical press forming is performed, a 25-ton press is used for pressing. The punching machine for punching is provided with a die.

Example 3

The preparation method of the lanthanum-cerium alloy of rare earth comprises the following steps of using rare earth La₁₇Ce₄₀Alloy is used as raw material, rare earth La is added₁₇Ce₄₀The alloy is put into a box with a cover and is mechanically punched and molded, and the lanthanum content, the cerium content and the iron content of the prepared product are respectively 20 wt%, 45 wt% and 45 wt%. The mass of the added cerium fluoride in the experiment can be used for obtaining the mass of the added pure cerium before the experiment according to the mass conservation, so that the recovery rate of the cerium is calculated to be 95%.

In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.

Claims

1. The lanthanum-cerium alloy of rare earth is characterized in that: the lanthanum content is 12-20 wt%, the cerium content is 35-45 wt%, and the iron content is 35-45 wt%.

2. The rare earth lanthanum cerium alloy of claim 1, wherein: the lanthanum content is 12-17 wt%, the cerium content is 35-40 wt%, and the iron content is 35-43%.

3. The rare earth lanthanum cerium alloy of claim 1, wherein: the lanthanum content was 17 wt%, the cerium content was 40 wt%, and the iron content was 43 wt%.

4. The preparation method of the lanthanum-cerium alloy of rare earth is characterized by comprising the following steps: comprises the following steps of using rare earth La₁₇Ce₄₀Alloy is used as raw material, rare earth La is added₁₇Ce₄₀The alloy is put into a box with a cover and is mechanically punched and molded, and the prepared product contains 12 to 20 weight percent of lanthanum, 35 to 45 weight percent of cerium and 35 to 45 weight percent of iron.

5. The method for preparing lanthanum-cerium rare earth alloy as claimed in claim 1, wherein: the box with the cover is made of low-carbon aluminum killed steel.

6. The method for preparing lanthanum-cerium rare earth alloy as claimed in claim 1, wherein: when the mechanical press forming is performed, a 25-ton press is used for pressing.

7. The method for preparing lanthanum-cerium rare earth alloy as claimed in claim 1, wherein: the punching machine for punching is provided with a die.

8. The method for preparing lanthanum-cerium rare earth alloy as claimed in claim 1, wherein: the prepared product contains 12-17 wt% of lanthanum, 35-40 wt% of cerium and 35-43 wt% of iron.

9. The method for preparing lanthanum-cerium rare earth alloy as claimed in claim 1, wherein: the lanthanum content of the prepared product was 17 wt%, the cerium content was 40 wt%, and the iron content was 43%.