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A method for extracting vanadium by multi-stage roasting of stone coal vanadium ore and enhanced acid-mixing aging

A technology for stone coal mine and stone coal vanadium, which is applied in the field of multi-stage roasting and strengthening of acid mixing and ripening for vanadium extraction in stone coal and vanadium mine, can solve problems such as safety, environment, problems, etc., and achieves improvement of oxidation rate and leaching rate, simple process and effect. good effect

Active Publication Date: 2021-06-15
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

but NO 2 The gas is a poisonous and harmful gas, easily soluble in water to form a strong acid, which has safety and environmental problems

Method used

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  • A method for extracting vanadium by multi-stage roasting of stone coal vanadium ore and enhanced acid-mixing aging
  • A method for extracting vanadium by multi-stage roasting of stone coal vanadium ore and enhanced acid-mixing aging
  • A method for extracting vanadium by multi-stage roasting of stone coal vanadium ore and enhanced acid-mixing aging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Process such as figure 1 shown;

[0042] Stone coal vanadium ore block contains V by mass percentage 2 o 5 0.9~1.3%, K2 O, Al 2 o 3 , CaO, TiO 2 ,P 2 o 5 The mass percentages of C and C are 3.54%, 12.58%, 3.37%, 1.23%, 0.67% and 15.75% respectively; the stone coal vanadium ore block with a particle size of 10-200mm is crushed to 2-10mm to make stone coal ore particles; Grinding the stone coal ore particles to a mass content of -0.074mm of 65% to make stone coal ore powder;

[0043] A suspension roasting device with a combustion station at the bottom and an induced draft fan connected to the top is adopted. When the induced draft fan is turned on, air and gas are introduced into the combustion station for combustion to generate hot flue gas, which then enters the suspension roasting device; at the same time, the stone The coal ore powder is transported to the suspension roasting device, and the stone coal ore powder enters from the upper part of the suspension r...

Embodiment 2

[0049] Method is with embodiment 1, and difference is:

[0050] (1) Stone coal vanadium ore block contains V by mass percentage 2 o 5 0.93%, Al 2 o 3 The mass percentages of CaO, C and C are 11.32%, 4.43% and 10.15% respectively; the mass content of stone coal ore particles ground to -0.074mm is 75%;

[0051] (2) Stone coal powder is roasted at 750°C with heat storage, and the residence time in the suspension roasting device is 50s;

[0052] (3) Decarburization and roasting at a temperature of 600 ° C, and the residence time of the heat storage stone coal ore powder in the decarburization roasting device is 20 minutes;

[0053] (4) The volume ratio of air and nitrogen in the mixed gas is 3; the temperature of the decarburized material is controlled at 800°C, and the residence time of the decarburized material in the crystal breaking roasting device is 60min;

[0054] (5) Add water and sulfuric acid solution to the crystal-breaking roasting material and stir and mix evenl...

Embodiment 3

[0057] Method is with embodiment 1, and difference is:

[0058] (1) The mass content of the part of stone coal mine particles ground to -0.038mm is 90%;

[0059] (2) Stone coal powder is roasted at 800°C with heat storage, and the residence time in the suspension roasting device is 30s;

[0060] (3) Decarburization and roasting at a temperature of 700 ° C, and the residence time of the heat storage stone coal ore powder in the decarburization roasting device is 15 minutes;

[0061] (4) The volume ratio of air and nitrogen in the mixed gas is 3.5; the temperature of the decarburized material is controlled at 850°C, and the residence time of the decarburized material in the crystal breaking roasting device is 50min;

[0062] (5) Add water and sulfuric acid solution to the crystal breaking and roasting material and stir and mix evenly, water accounts for 10% of the total mass of all materials, and sulfuric acid solution accounts for 35% of the total mass of all materials; 160 ° ...

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Abstract

A method for extracting vanadium from stone coal vanadium ore by multi-stage roasting and intensified acid-mixing aging, which is carried out according to the following steps: (1) crushing and grinding the block of stone coal vanadium ore to make stone coal ore powder; (2) making hot flue gas stone The coal ore powder is transported to the suspension roasting device, and it is stored and roasted at 700-900°C to form the heat-storing stone coal powder; (3) it is transported to the decarbonization roasting device, and air is introduced; the heat-storing stone coal powder is suspended and heated at 500-800°C Decarburization roasting; (4) Pass mixed gas into the crystal breaking roasting device, and the decarburized material is oxidized in the crystal breaking roasting device at 750-900°C to form a broken crystal roasting material; (5) Add water and sulfuric acid solution and Stir and mix evenly, ripen at 140-200°C, and cool to normal temperature; (6) Mix with water to extract vanadium by water leaching, and filter and separate. The method of the invention has high vanadium leaching rate, simple process, energy-saving and environment-friendly equipment, and easy industrial application.

Description

technical field [0001] The invention belongs to the technical field of vanadium extraction from stone coal, and in particular relates to a method for extracting vanadium from stone coal vanadium ore by multi-stage roasting and strengthening acid-mixed aging. Background technique [0002] Vanadium is a very important strategic resource, mainly used in iron and steel industry, aviation industry, nuclear industry, new energy and other fields. At the same time, my country's huge reserves of vanadium resources rank first in the world. Vanadium-containing stone coal is the main form of vanadium resources in my country. According to the degree of weathering, stone coal is divided into primary type stone coal and weathered type stone coal. Among them, primary type stone coal is difficult to handle, and the production level of vanadium extraction from stone coal in my country is backward. , especially for weathered stone coal, the level of efficient vanadium extraction is low, resulti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/22C22B1/10C22B1/02C22B3/08
CPCC22B1/02C22B1/10C22B3/08C22B34/22Y02P10/20
Inventor 孙永升袁帅白哲李艳军韩跃新高鹏
Owner NORTHEASTERN UNIV LIAONING
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