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Method for extracting niobium from tailings

A tailings and mineral technology, applied in the field of niobium extraction, can solve the problems of high power consumption and high cost, and achieve the effects of high heating efficiency, fast heating speed and high leaching rate

Inactive Publication Date: 2011-08-31
INNER MONGOLIA UNIV OF SCI & TECH
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  • Description
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Problems solved by technology

Using the above method to extract niobium requires large power consumption and high cost

Method used

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  • Method for extracting niobium from tailings
  • Method for extracting niobium from tailings
  • Method for extracting niobium from tailings

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Embodiment 1

[0026] The crude niobium concentrate is gradually processed under the process conditions given in the "microwave magnetization roasting-weak magnetic separation-acid leaching" method.

[0027] The tailings in this example come from Baotou Steel Concentrator, and its composition is shown in Table 1.

[0028] Table 1 The multi-element analysis results of flotation rare earth tailings in Baotou Steel, %

[0029]

[0030] The flotation method is used to treat the tailings, and minerals with an iron grade of 49.4-54.1% and a niobium content of 0.16-0.25% can be extracted. According to the amount of carbonaceous reductant added is 1.85% of the total amount of coarse niobium iron concentrate, and the protective gas is introduced during the reduction process. The flow rate is 2-5L / min. Roasting for 20 minutes, the roasting temperature is 650°C, the roasted product is finely ground to 400 mesh, and magnetically separated in a weak magnetic tube with a magnetic field of 80KA / m. At t...

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Abstract

The invention relates to a method for extracting niobium from tailings, belonging to the technical field of mineral extraction metallurgy. The method includes the steps as follows: (1) treating the tailings with a flotation method so as to float out iron and niobium minerals from the tailings; (2) using a microwave magnetizing-roasting method and adding carbonaceous reducing agent in the floated minerals so as to convert the haematite in the minerals into magnetite; (3) separating the magnetite out from the roasted minerals by adopting a low-intensity magnetic separation method, thus enriching the niobium minerals in the tailings subjected to magnetic separation; and (4) leaching the obtained niobium minerals out in a high-pressure kettle with concentrated acid so as to obtain niobium-containing extract. The method flow is short, flotation agent types are few and the flotation effect is good; the mineral roasting time is short, the consumption quantity of reducing agent is less and the cost is low; the content of hazardous elements such as S, P and the like in the magnetite obtained by low-intensity magnetic separation is low simultaneously when niobium is enriched, niobium is an excellent material for making iron with a blast furnace, and environment pollution caused by the tailings is solved to a large extent.

Description

Technical field: [0001] The invention relates to a method for extracting niobium from tailings, belonging to the technical field of mineral extraction metallurgy. Background technique [0002] Niobium is a rare metal with a wide range of uses, widely used in steel, petrochemical, aerospace, nuclear industry, information engineering, marine engineering, electronics, electrical appliances, superconductivity, lasers and medicine and other industrial fields, and in many cutting-edge technologies important role in the field. [0003] my country is rich in niobium resources, and its reserves rank second in the world. Among them, the Baotou Baiyun Obo deposit has the largest reserves of niobium resources, accounting for 95% of my country's niobium resources reserves, ranking first in my country and second in the world. The Baiyun Obo deposit contains 18 kinds of niobium minerals such as niobium iron ore, and the reserves of niobium resources are large and widely distributed. How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00C22B3/06C22B34/24
CPCY02P10/20
Inventor 李保卫李解张邦文王磊
Owner INNER MONGOLIA UNIV OF SCI & TECH
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