A comprehensive recovery process of associated tantalum-niobium ore

A tantalum-niobium ore and process technology, which is applied in solid separation, wet separation, chemical instruments and methods, etc., can solve the problem that valuable metals cannot be reasonably recycled, the grade of tantalum-niobium concentrate is low, and the embedded particle size is uneven, etc. problems, to achieve the effect of strong selectivity and collection capacity, good beneficiation index and low production cost

Active Publication Date: 2018-05-15
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the associated tantalum and niobium minerals with uneven particle size, dispersed distribution, complex components and rich in other rare metals, the above methods have low recovery rate of tantalum and niobium, low grade of tantalum and niobium concentrate, and other valuable metals cannot be obtained reasonably. Drawbacks of Recycling

Method used

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  • A comprehensive recovery process of associated tantalum-niobium ore

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] An associated tantalum-niobium ore in Gansu 2 o 5 Grade 29.6g / t, Nb 2 o 5 The grade is 104g / t. Tantalum and niobium mainly exist in the form of niobium-tantalite. The distribution of tantalum-niobite is uneven in size, with coarse grains greater than 0.15mm and fine grains less than 0.037mm. In addition to tantalum-niobium, rare metals are also associated in the ore Rubidium, Rb 2 The O grade is 0.14%. The main minerals in the ore are biotite, potassium feldspar, quartz, and a small amount of sulfide. The particle size of biotite is relatively coarse, mostly greater than 0.15mm. Rubidium occurs in biotite and feldspar.

[0020] The recovery process of the ore for tantalum, niobium and rare metals is as follows:

[0021] 1) Grinding: After the raw ore is wet-ground to a fineness of -0.074mm accounting for 45%, the grinding concentration is 55%;

[0022] 2) Screening: Use a 75-mesh sieve to screen and classify the wet-milled pulp;

[0023] 3) Magnetic separation of ...

Embodiment 2

[0028] The main minerals in an associated tantalum-niobium ore in Jiangxi are lepidolite, albite, quartz and a small amount of sulfide. The tantalum-niobium minerals mainly exist in the form of niobium-tantalum-manganese ore. 2 o 5 Grade 87.23g / t, Nb 2 o 5 The grade is 97.58g / t, the particle size of tantalum and niobium intercalation is very different, the coarse particle is more than 0.2mm, and the fine particle is less than 0.037mm. The ore is also accompanied by rare metal lithium, which exists in iron lepidolite. Li 2 O grade is 0.087%.

[0029] The recovery process of the ore for tantalum, niobium and rare metals is as follows:

[0030] 1) Grinding: Wet grind the raw ore to a fineness of -0.074mm, accounting for 40%, and the grinding concentration is 60%;

[0031] 2) Screening: Use a 120-mesh sieve to screen and classify the wet-milled pulp;

[0032] 3) Magnetic separation of coarse-grained products: coarse-grained products on the sieve are fed into a high-gradient m...

Embodiment 3

[0037] The main minerals in an associated tantalum-niobium ore in Inner Mongolia are biotite, iron lepidolite, potassium feldspar, quartz, and tantalum-niobium minerals mainly exist in the form of niobium-tantalite. 2 o 5 Grade 70.77g / t, Nb 2 o 5 The grade is 135.37g / t, the particle size of tantalum and niobium intercalation is very different, the coarse particle is more than 0.15mm, and the fine particle is less than 0.037mm. The ore is also accompanied by rare metals lithium and rubidium. Lithium occurs in iron lepidolite, and rubidium occurs in biotite and potassium feldspar, Rb 2 O grade 0.12%, Li 2 O grade 0.041%.

[0038] The recovery process of the ore for tantalum, niobium and rare metals is as follows:

[0039] 1) Grinding: After the raw ore is wet-ground to a fineness of -0.074mm accounting for 45%, the grinding concentration is 50%;

[0040] 2) Screening: Use a 140-mesh sieve to screen and classify the wet-milled pulp;

[0041] 3) Magnetic separation of coars...

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Abstract

The invention provides a comprehensive recovery process of associated tantalum-niobium ore, which is mainly to classify the raw ore after rough grinding, and adopt high-gradient magnetic separation-heavy liquid separation to recover coarse-grained tantalum-niobium minerals and rich rare minerals. For metal mica minerals, after the products under the sieve are removed by sulfide ore flotation, fine-grained tantalum-niobium minerals and feldspar minerals rich in rare metals are recovered by flotation successively. Combination collectors with strong performance and collection capacity are bisphosphonic acid, benzyl hydroxamic acid and soybean oleic acid for flotation of tantalum and niobium. This process not only obtains tantalum-niobium minerals with better indicators, but also comprehensively recovers other rare metals associated with the minerals.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a process for comprehensively recovering tantalum-niobium elements and associated rare metals in associated tantalum-niobium ore. Background technique [0002] Tantalum and niobium are rare metals with high melting points, widely used in aerospace, military industry, semiconductor and other fields, and are indispensable metal materials for high-tech industries. my country's tantalum and niobium mineral resources are relatively rich, but there are few single deposits, and most of them are associated deposits, often accompanied by rare metals such as rubidium and beryllium, which have great comprehensive utilization value. [0003] The beneficiation of tantalum-niobium minerals is usually based on the different properties and characteristics of tantalum-niobium minerals, and is recovered by gravity separation, magnetic separation, and flotation. Generally, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03D1/018
Inventor 孙运礼陈杜娟王志丰郭海宁彭贵熊苗培杨俊龙袁艳任琳珠
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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