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Method for leaching out scandium from niobium tailing dressing

A tailings and leaching technology, which is applied in the field of metallurgy, can solve the problems of high cost, low scandium leaching rate, and difficult recovery of scandium, and achieve the effect of low cost, simple method, and realization of recycling

Active Publication Date: 2013-02-13
HUNAN RARE EARTH METAL MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for leaching scandium from niobium beneficiation tailings, to solve the technical problems that scandium is difficult to recycle in the prior art, the scandium leaching rate is low, and the cost is high

Method used

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  • Method for leaching out scandium from niobium tailing dressing
  • Method for leaching out scandium from niobium tailing dressing
  • Method for leaching out scandium from niobium tailing dressing

Examples

Experimental program
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Effect test

Embodiment 1

[0048] 1) The niobium-selected tailings are crushed to obtain niobium-selected tailings powder with a particle size of 100 mesh, and the niobium-selected tailings powder, CaCl 2 and reducing carbon powder according to the mass ratio of 20:15:4, fully ball milled and mixed evenly, adding tap water to obtain a slurry;

[0049] 2) Pellet the slurry, place it in an oven and dry it at 120°C for 2 hours, then place it in a box-type electric furnace and roast it at 800°C for 2 hours to obtain a roasted product;

[0050] 3) Grind the roasted product into fine powder, add concentrated hydrochloric acid with a mass percentage of 37% concentration at a solid-liquid mass-volume ratio (roasted product mass: leachate volume) of 1:3.2, and leach at 80°C for 2 hours to obtain leachate and leachate slag;

[0051] 4) Put the leaching solution in a graphite evaporator and heat it to 108°C to concentrate to obtain a concentrated solution. Stop heating when the volume of the concentrated solution...

Embodiment 2

[0053] 1) The niobium-selected tailings are crushed to obtain niobium-selected tailings powder with a particle size of 100 mesh, and the niobium-selected tailings powder, CaCl 2 and reducing carbon powder according to the mass ratio of 20:15:4, fully ball milled and mixed evenly, adding tap water to obtain a slurry;

[0054] 2) Pellet the slurry, place it in an oven and dry it at 120°C for 2 hours, then place it in a box-type electric furnace and roast it at 680°C for 6 hours to obtain a roasted product;

[0055] 3) Grind the roasted product into fine powder, add concentrated hydrochloric acid with a mass percent concentration of 37% at a solid-to-liquid mass-volume ratio of 1:2.1, and leaching at 60°C for 4 hours to obtain leaching liquid and leaching residue;

[0056] 4) Put the leaching solution in a graphite evaporator and heat it to 108°C to concentrate to obtain a concentrated solution. Stop heating when the volume of the concentrated solution is 50% to 60% of the volume...

Embodiment 3

[0058] 1) The niobium-selected tailings are crushed to obtain niobium-selected tailings powder with a particle size of 100 mesh, and the niobium-selected tailings powder, CaCl 2 and reducing carbon powder according to the mass ratio of 20:15:4, fully ball milled and mixed evenly, adding tap water to obtain a slurry;

[0059] 2) Pellet the slurry, place it in an oven and dry it at 120°C for 2 hours, then place it in a box-type electric furnace and roast it at 700°C for 3 hours to obtain a roasted product;

[0060] 3) Grind the roasted product into fine powder, add concentrated hydrochloric acid with a mass percent concentration of 37% at a solid-to-liquid mass-volume ratio of 1:2.8, and leaching at 90°C for 2 hours to obtain leaching liquid and leaching residue;

[0061] 4) Put the leaching solution in a graphite evaporator and heat it to 108°C to concentrate to obtain a concentrated solution. Stop heating when the volume of the concentrated solution is 50% to 60% of the volume...

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Abstract

The invention provides a method for leaching out scandium from niobium tailing dressing. The method comprises the following steps: niobium tailing dressing powder is obtained through crushing the niobium tailing dressing, the niobium tailing dressing powder, CaC12 and reducing carbon powder are sufficiently ball-milled and uniformly mixed, tap water is added for wetting to obtain slurry, the slurry is roasted at a temperature of 680 to 800 DEG C for 2 to 6 h to obtain a roasted product, the roasted product is added in concentrated hydrochloric acid with solid-liquid massic volume ratio of 1:2.1 to 1:3.2 to be subjected to concentrated hydrochloric acid leaching to obtain leachate and leaching slag, and the leachate is subjected to concentrated hydrochloric acid recovery, concentration and purification to obtain scandium. The method solves the technical problems that in the prior art, scandium is difficult to recover, the scandium leaching rate is low, and the cost is high.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for leaching scandium from niobium beneficiation tailings. Background technique [0002] Scandium and its compounds are soft in texture and are often used to make alloys to improve the strength, hardness and heat resistance of alloys. They are widely used in metallurgical industry, petrochemical industry, glass, ceramics, electronic industry, computer power supply, aerospace, nuclear technology and medical science And other fields, has extremely high application value. Scandium is a typical dispersed element in the earth's crust, and independent scandium minerals rarely appear, and often exist in minerals in the form of endoplasmic impurities. Due to the scarcity of independent scandium deposits, it is necessary to recover scandium associated with various scandium-containing minerals. When recovering scandium, it is necessary to consider the grade of scandium in raw materials,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B3/10C22B59/00
CPCY02P10/20
Inventor 刘吉波包新军王志坚苏正夫邓志军余荣旻
Owner HUNAN RARE EARTH METAL MATERIAL RES INST
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