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System and method for chlorinating vanadium-containing stone coals

The technology of a chlorination system and vanadium stone is applied in the field of vanadium extraction process, which can solve the problems of impurity entry, complicated operation and high roasting energy consumption, and achieves the effects of high chlorination rate, improved economy and reduced energy consumption

Pending Publication Date: 2018-04-06
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defect of this technology is that 1) adding roasting additive CaF 2 Roasting consumes a lot of energy and is easy to generate fluorine-containing flue gas, and fluorine-containing waste water is likely to be generated during the clinker leaching process, which is unfavorable for environmental protection; Increase the leaching rate of vanadium, but more impurities will enter the leaching solution, which greatly increases the difficulty of purifying and removing impurities in the vanadium leaching solution
The disadvantages of this technology are: 1) The acquisition of the ore pulp before leaching requires grinding, activation, and then adding activators and calcium-based carriers, and the operation is cumbersome; 2) Calcium sulfate in the ore pulp before leaching is saturated and precipitates in the crevices of the ore , will hinder the leaching of vanadium in the ore, and it is difficult to achieve the expected leaching effect

Method used

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  • System and method for chlorinating vanadium-containing stone coals
  • System and method for chlorinating vanadium-containing stone coals
  • System and method for chlorinating vanadium-containing stone coals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] like Figure 1-2 Shown, provide a kind of method using the above-mentioned system chlorination vanadium-containing stone coal, comprise the following steps:

[0064] 1) Grinding and batching: stone coal powder is obtained by grinding vanadium-containing stone coal in a grinding device, and stone coal powder with a particle size below 0.1mm accounts for 80% of the total stone coal powder quality; the particle size is The ratio of the solid salt less than 0.1mm to the total solid salt mass is 90%; the stone coal powder and potassium chloride are mixed uniformly in the mixing silo 1 according to the mass ratio of 100:0.03 to form a mixture;

[0065] 2) Chlorination: Nitrogen gas is first introduced into the chlorination furnace 2, and when the partial pressure of nitrogen in the furnace is equal to the external atmospheric pressure, after heating the chlorination furnace for 2 to 450°C, the nitrogen gas is stopped and the chlorine gas is introduced, and the mixture is adde...

Embodiment 2

[0070] like Figure 1-2 Shown, provide a kind of method using the above-mentioned system chlorination vanadium-containing stone coal, comprise the following steps:

[0071] 1) Grinding and batching: stone coal powder is obtained by grinding vanadium-containing stone coal in a grinding device, and stone coal powder with a particle size below 0.1mm accounts for 80% of the total stone coal powder quality; the particle size is The ratio of the solid salt less than 0.1mm to the total solid salt mass is 90%; the stone coal powder and sodium chloride are mixed uniformly in the mixing bin 1 according to the mass ratio of 100:0.1 to form a mixture;

[0072] 2) Chlorination: Nitrogen gas is first introduced into the chlorination furnace 2, and when the partial pressure of nitrogen in the furnace is equal to the external atmospheric pressure, after heating the chlorination furnace for 2 to 600°C, the nitrogen gas is stopped and the chlorine gas is introduced, and the mixture is added to st...

Embodiment 3

[0077] like Figure 1-2 Shown, provide a kind of method using the above-mentioned system chlorination vanadium-containing stone coal, comprise the following steps:

[0078] 1) Grinding and batching: stone coal powder is obtained by grinding vanadium-containing stone coal in a grinding device, and stone coal powder with a particle size below 0.1mm accounts for 100% of the total stone coal powder quality; the particle size is The proportion of the solid salt less than 0.1mm in the total solid salt mass is 91%; the stone coal powder and solid salt (the solid salt is potassium chloride and sodium chloride are mixed according to the mass ratio of 1:1) according to the mass ratio of 100 : 0.05 is mixed uniformly into a mixture in the mixing silo 1;

[0079] 2) Chlorination: Nitrogen gas is first introduced into the chlorination furnace 2, and when the partial pressure of nitrogen in the furnace is equal to the external atmospheric pressure, after heating the chlorination furnace fo...

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Abstract

The invention relates to a system used for chlorination of vanadium-containing stone coal. The system includes: a grinding device, a mixing bin, a chlorination system, a dust collector, and a condensation system. The invention also relates to a method for chlorinating vanadium-containing stone coal. Aiming at the characteristics of high carbon, low vanadium and high silicon in stone coal, the present invention uses chlorine gas to add carbochlorination, and adopts condensation means to collect products and remove impurities. At the same time, two elements of vanadium and silicon are recovered, and the main product obtained is vanadium. The content of chloride and vanadium chloride reaches more than 90%, which can significantly reduce the energy consumption of the subsequent treatment steps and improve the economy. Using the chlorination method to treat vanadium-containing stone coal does not produce waste water, the chlorination rate of vanadium is high, and the tail gas can be recycled.

Description

technical field [0001] The invention relates to the field of vanadium extraction technology, more specifically, to a system and method for chlorinating vanadium-containing stone coal. Background technique [0002] Stone coal is an important vanadium-containing resource in China, which is rich in reserves in my country, and the reserves of vanadium contained in it are expressed in V 2 o 5 Calculated at 118 million tons, accounting for 87% of the total domestic reserves. Vanadium-bearing stone coal is a difficult primary stone coal vanadium ore, containing about 10-25wt% carbon and 70-85% ash, and SiO in ash 2 The content can reach 60-80%, V 2 o 5 The content of vanadium is generally 0.4 to 1.0%, and the vanadium in it is mainly V(III), and the content of V(IV) and V(V) is relatively low, so the extraction of vanadium is more difficult. [0003] The existing methods for extracting vanadium from stone coal include acid-mixed aging-leaching method, direct acid leaching-extr...

Claims

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Application Information

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IPC IPC(8): C22B1/08C22B34/22
CPCC22B1/08C22B34/22
Inventor 韩志彪冯鲁兴唐敬坤郑权张学伟员晓刘亮吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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