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Technology of preparing fluorine less niobium oxide by oxalic acid system extraction method

An extraction method and a niobium oxide technology, which is applied in the field of oxalic acid system extraction method to prepare fluorine-free niobium oxide, and achieves the effects of reducing production costs, solving safety and environmental pollution problems, and improving product quality.

Inactive Publication Date: 2007-12-26
郭青蔚 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a process for producing niobium oxide by wet method. More than 200 niobium-rich raw materials, and there is no production safety and environmental pollution problems that the hydrofluoric acid method has

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  • Technology of preparing fluorine less niobium oxide by oxalic acid system extraction method

Examples

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Embodiment

[0077]In conjunction with the accompanying drawings, the raw material in this example is the Baiyan Obo Iron Rare Earth Niobium Polymetallic Mine in Baotou, China, which is enriched through the iron and steel process (that is, niobium enters molten iron during ironmaking, and niobium oxidizes into steelmaking slag during steelmaking) to obtain a niobium-containing Converter slag, its main components are:

[0078] Sorting

Sample No.

Nb 2 o 5 (%)

Fe(%)

Mnof(%)

Slag

Slag-1

6.16

30.4

35.4

Slag-2

5.9

25.0

34.9

Slag after magnetic separation

slag-1

6.0

19.6

42.5

Slag-2

6.0

15.8

41.7

Slag-3

6.1

18.1

40.3

[0079] After the magnetic separation slag is pickled and enriched, the pickled slag of the following components is obtained, which is used as the raw material for extracting niobium in this proce...

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Abstract

The present invention relates to a process for preparing fluorine-free niobium oxide by using oxalic acid system extraction method. It is applicable to niobium-rich raw material whose niobium / tantalum ratio is above 200. Its raw material includes various low-grade niobium-bearing materials including iron / steel metallurgical slag containing niobium and high-grade niobium-bearing pyrochlorite concentrate. Its preparation process includes the following several steps: raw material treatment, mineral decomposition, water-washing, leaching-out, extraction, back-extracting niobium, strip liquor treatment and crystal calcinations. Its extraction process adopts solvent extraction method to extract niobium and separate impurity.

Description

technical field [0001] The invention belongs to the scope of hydrometallurgy, and relates to a process for producing industrial-grade and high-purity fluorine-free niobium pentoxide products, in particular to a process for preparing fluorine-free niobium oxide by an oxalic acid system extraction method. Background technique [0002] Energy, information and materials are the three pillars of modern civilization. Today, new materials are regarded as the basis and forerunner of the technological revolution. Niobium is a rare metal with a high melting point, and together with tungsten, molybdenum, and tantalum, it is called the four major space metals. Niobium is not only a special functional material, but also an excellent structural material. With the rapid growth of the application of niobium compound single crystal surface acoustic wave filters in electronic fields such as color TV sets, video recorders, and mobile communications, and the continuous expansion of the applic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/20C22B3/16C22B3/26
CPCY02P10/20
Inventor 郭青蔚曹万里
Owner 郭青蔚