Stone coal vanadium ore multi-stage roasting strengthened acid curing vanadium extraction method

A technology of stone coal vanadium and stone coal mines, which is applied in the field of vanadium extraction by multi-stage roasting and enhanced acid-mixing slaking of stone coal vanadium mines, which can solve the problems of safety, environment and problems, and achieve the improvement of oxidation rate and leaching rate, simple process and high efficiency. The effect of energy efficiency

Active Publication Date: 2020-06-19
NORTHEASTERN UNIV
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  • 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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  • Stone coal vanadium ore multi-stage roasting strengthened acid curing vanadium extraction method
  • Stone coal vanadium ore multi-stage roasting strengthened acid curing vanadium extraction method
  • Stone coal vanadium ore multi-stage roasting strengthened acid curing vanadium extraction method

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

The invention discloses a stone coal vanadium ore multi-stage roasting strengthened acid curing vanadium extraction method. The method is conducted through the following steps that (1) a particle sizestone coal vanadium ore block is crushed and ground into stone coal ore powder; (2) hot flue gas and the stone coal ore powder are conveyed to a suspension roasting device, and heat storage roastingis conducted at the temperature of 700-900 DEG C to form heat storage stone coal ore powder; (3) the power is conveyed to a decarburizing roasting device, air is introduced, the heat storage stone coal ore powder is suspended and decarburized at 500- 800 DEG C; (4) mixed gas is introduced into a decrystallization roasting device, and the decarburized material is subjected to oxidization reaction at 750-900 DEG C in the decrystallization roasting device to form a decrystallization roasted material; (5) water and a sulfuric acid solution are added, a mixture is stirred and mixed uniformly, curing is conducted at 140-200 DEG C, and cooling is conducted to a room temperature; and (6) mixing with water is conducted for water leaching vanadium extraction, and filtering and separating are conducted. The method is high in vanadium leaching rate, simple in process, energy-saving and environment-friendly in equipment and easy to realize 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 Applications(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
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