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Comprehensive recycling process for associated tantalum-niobium ores

A technology of tantalum-niobium ore and tantalum-niobium, which is used 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. and other problems, to achieve the effect of strong selectivity and collection ability, good mineral processing index and low production cost

Active Publication Date: 2015-12-09
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • 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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  • Comprehensive recycling process for associated tantalum-niobium ores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 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.

[0022] The recovery process of the ore for tantalum, niobium and rare metals is as follows:

[0023] 1) Grinding: After the raw ore is wet-ground to a fineness of -0.074mm and accounts for 45%, the grinding concentration is 55%;

[0024] 2) Screening: use a 75-mesh sieve to screen and classify the wet-milled pulp;

[0025] 3) Magnetic separation o...

Embodiment 2

[0030] 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%.

[0031] The recovery process of the ore for tantalum, niobium and rare metals is as follows:

[0032] 1) Grinding: the raw ore is wet-ground to a fineness of -0.074mm, accounting for 40%, and the grinding concentration is 60%;

[0033] 2) Screening: use a 120-mesh sieve to screen and classify the wet-milled pulp;

[0034] 3) Magnetic separation of coarse-grained products: coarse-grained products on the sieve are fed into a high-gradie...

Embodiment 3

[0039] 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%.

[0040] The recovery process of the ore for tantalum, niobium and rare metals is as follows:

[0041] 1) Grinding: After the raw ore is wet-ground until the fineness-0.074mm accounts for 45%, the grinding concentration is 50%; 2) Screening: Use a 140-mesh sieve to sieve and classify the wet-grinded pulp;

[0042] 3) Magnetic separation of coarse-grained p...

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Abstract

The invention provides a comprehensive recycling process for associated tantalum-niobium ores. Mainly, classification is conducted after raw ores are rough ground; rough grain tantalum-niobium minerals and mica minerals rich in rare metal are recycled from rough grain products on a sieve through a high-gradient magnetic separation-heavy fluid separation method; fine fraction tantalum-niobium minerals and feldspar minerals rich in rare metal are recycled through a floatation method after sulphide ore floatation and impurity removal are conducted on products below the sieve; a combined collecting agent which includes diphosphonic acid, benzohydroxamic acid and soybean oil acid flotation and is high in tantalum-niobium mineral selectivity and collecting capacity is added during tantalum-niobium flotation so that tantalum and niobium can be obtained through floatation. By means of the process, tantalum-niobium minerals good in index are obtained, and other associated rare metal in the minerals is comprehensively recycled.

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 and niobium minerals is usually recovered by gravity separation, magnetic separation and flotation according to the different properties of tantalum and niobium minerals. For example, for ores with hi...

Claims

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Application Information

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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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