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Rare earth purification method and electric heating furnace

A purification method and electric heating furnace technology, applied in the field of rare earth purification method and electric heating furnace, can solve the problems of serious environmental pollution, waste of resources, difficult temperature control, etc., and achieve the effect of high purity of rare earth, precise control of heating temperature, and thorough removal of impurities

Inactive Publication Date: 2015-04-08
罗英明
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Problems solved by technology

The method of removing impurities in rare earth raw materials by heating in a kiln is difficult to control the temperature and the removal of impurities is not complete, the purity of the rare earth products obtained is not high, and the quality of the products is poor; in addition, the recovery rate of rare earths is low, which can only reach 20-25%, which is a serious waste of resources. , and the environmental pollution is very serious

Method used

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  • Rare earth purification method and electric heating furnace

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Embodiment Construction

[0019] Rare earth purification method of the present invention comprises the following steps:

[0020] First prepare the rare earth raw material, the preparation of the rare earth raw material comprises the following steps:

[0021] 1) Rare earth concentrate roasting;

[0022] 2) The roasted rare earth concentrate is mixed with coke powder, charcoal powder and binder;

[0023] 3) Group formation;

[0024] 4) dry. .

[0025] Rare earth raw materials are heated and purified in an electric furnace, including the following three heating stages:

[0026] 1. Medium temperature heating, heating temperature 480-520 ℃, heating time 40 minutes;

[0027] 2. High temperature heating, heating temperature 950-1000 ℃, heating time 40 minutes;

[0028] 3. Low temperature heating, 180-220 ℃, heating time 40 minutes;

[0029] Rare earth products are obtained after natural cooling.

[0030] The electric heating furnace used in the rare earth purification method of the present invention i...

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Abstract

The invention discloses a rare earth purification method and an electric heating furnace. A rare earth raw material is heated in the electric heating furnace for purification, and the purification process comprises the following three heating phases: moderate-temperature heating at 480-520 DEG C for 35-45 minutes, high-temperature heating at 950-1000 DEG C for 35-45 minutes and low-temperature heating at 180-220 DEG C for 35-45 minutes. The rare earth purification method disclosed by the invention adopts electric heating, and can accurately control the heating temperature and thoroughly remove impurities; the product has high rare earth purity, and the purity can be up to 82%; and the production process is green and environment-friendly.

Description

[technical field] [0001] The invention relates to rare earth purification, in particular to a rare earth purification method and an electric furnace. [Background technique] [0002] The traditional rare earth purification method uses kiln production, and uses wood, mountain grass or coal as fuel to heat the raw materials, so that the impurities in the rare earth raw materials are melted and sublimated, and finally the rare earth products are left. The method of removing impurities in rare earth raw materials by heating in a kiln is difficult to control the temperature and the removal of impurities is not thorough, the purity of the rare earth products obtained is not high, and the quality of the products is poor; in addition, the recovery rate of rare earths is low, which can only reach 20-25%, which is a serious waste of resources , and the environmental pollution is very serious. [Content of the invention] [0003] The technical problem to be solved by the invention is ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B59/00C22B1/00
Inventor 罗英明
Owner 罗英明
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