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Technological method for removing antimony in preparation of high-pure niobium oxide by niobium tantalite

A process method, niobium oxide technology, applied in chemical instruments and methods, niobium compounds, inorganic chemistry, etc., can solve problems such as excessive antimony, achieve good economic cost-effectiveness, broaden utilization value, and meet market demand.

Active Publication Date: 2013-11-27
JIUJIANG TANBRE
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Problems solved by technology

[0004] The purpose of the present invention is to provide a process for preparing high-purity niobium oxide and removing antimony from niobium-tantalite ore, which solves the technical problem that the impurity element antimony in the preparation of high-purity niobium oxide from niobium-tantalite ore exceeds the standard

Method used

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Embodiment

[0034] 1. Know the basic situation of the raw ore

[0035] Tantalum 4.91%, Niobium 46.44%, Tungsten 0.05%, Silicon 14%, Aluminum 0.8%, Titanium 7.5%, Iron 24.4%, Antimony 0.32%, Uranium 0.07%, Thorium 0.02%, Carbon 0.09%.

[0036] 2. Antimony removal by leaching

[0037] According to the process setting requirements, take 500 grams of ground raw ore (passed through a 325 mesh sieve), liquid-solid ratio: 4:1, 2000 ml of refined hydrochloric acid (superior pure GR grade) solution with a concentration of 36%, stirring and leaching for 2 hours , keep warm for 1 hour, and filter.

[0038] Wash the filter cake twice, take the filter cake (dried) and send it for analysis: antimony 0.21%.

[0039] 3. Decomposition:

[0040] According to the production process (experience) data of the enterprise's niobium-tantalite ore: take 350g of the pre-treated niobium-tantalite ore (dried filter cake) for decomposition (use 210ml of sulfuric acid, 630ml of hydrofluoric acid, total volume 840ml)...

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Abstract

A technological method for removing antimony in the preparation of high-pure niobium oxide by niobium tantalite comprises the following steps: ball milling and antimony removing, namely, ball milling niobium tantalite, and then performing wet leaching on the niobium tantalite by using prepared concentrated hydrochloric acid, so as to remove antimony; form and property conversion and tantalum-niobium resolving, namely, resolving the tantalum-niobium by using sulfuric acid-hydrofluoric acid, and performing the property conversion on fluorine complex compounds of antimony in the resolving lixivium; extraction, namely, performing extraction by using sec-octyl alcohol; stoving; calcination; sampling, analyzing, packaging and putting in storage. According to the invention, the technical problem that the content of impurity element antimony exceeds the standard in the preparation of high purity niobium oxide by the niobium tantalite is solved; the technological method is characterized in that the content of the main impurity element antimony in the prepared high purity niobium oxide reaches 5 ppm below, can meet the requirement for quality of high-pure and ultra-pure products well, and greatly increases the utility value of scarce resources.

Description

technical field [0001] The invention relates to a process method for preparing high-purity niobium oxide and removing antimony from niobium-tantalite. Background technique [0002] High-purity niobium oxide is used for drawing LT (lithium niobate) single crystal for laser, microacoustic surface wave, information storage, optical fiber communication, infrared detection, special optical glass coating (improving optical performance), and making niobium-based Basic materials in high-tech fields such as superconductors and niobium-based catalysts have extremely high requirements for impurity elements. [0003] For a long time, the raw materials for the production of high-purity niobium oxide are mainly niobium concentrate, and its chemical property indicators are all formulated according to the production standards of niobium concentrate. Due to the small stock of antimony and other key impurity elements, it is easier to control than non-niobium concentrate . With the appli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G33/00
Inventor 梁昌明李小三晏慧娟
Owner JIUJIANG TANBRE
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