A kind of method for preparing sodium sulfide by reduction of molten state of industrial sodium sulfate

A sodium sulfate, molten state technology, applied in the field of sodium sulfide preparation, can solve the problems of small equipment corrosion, equipment corrosion, complex process, etc., and achieve the effects of low environmental pollution, low equipment corrosion, and high purity

Active Publication Date: 2021-03-02
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the complex process when preparing sodium sulfide by using industrial sodium sulfate as raw material in the prior art, the sodium sulfide purity obtained is not high, the environmental pollution is large, and the problem of serious corrosion to equipment is provided. A method for preparing sodium sulfide by industrial sodium sulfate molten state reduction, the method adopts the full fire method to prepare sodium sulfide, the operation is simple and environmentally friendly, the obtained sodium sulfide has high purity, and the degree of corrosion to equipment is small

Method used

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  • A kind of method for preparing sodium sulfide by reduction of molten state of industrial sodium sulfate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) adopting fractional crystallization to purify industrial sodium sulfate to a purity of 90%;

[0048](2) Put the purified industrial sodium sulfate as a raw material into the blowing furnace, ignite and heat it to 1000°C with a gas heating gun, turn the industrial sodium sulfate raw material into molten sodium sulfate, and then use a gas spray gun to spray coke oven gas to carry out blowing reduction, reducing molten sodium sulfate to molten sodium sulfide;

[0049] (3) Molten state sodium sulfide is poured out from blowing furnace, casts molding on iron plate, obtains sodium sulfide after cooling;

[0050] (4) The waste gas produced in blowing reduction is injected into the lye absorption tower for absorption treatment.

Embodiment 2

[0052] (1) industrial sodium sulfate is purified to a purity of 95% by adopting fractional crystallization;

[0053] (2) Put the purified industrial sodium sulfate as a raw material into the blowing furnace, ignite and heat it to 1050°C with a gas heating gun, turn the industrial sodium sulfate raw material into molten sodium sulfate, and then blow natural gas with a gas spray gun for blowing Reduction, reducing molten sodium sulfate to molten sodium sulfide;

[0054] (3) Molten state sodium sulfide is poured out from blowing furnace, casts molding on iron plate, obtains sodium sulfide after cooling;

[0055] (4) The waste gas produced in blowing reduction is injected into the lye absorption tower for absorption treatment.

Embodiment 3

[0057] (1) industrial sodium sulfate is purified to a purity of 93% by fractional crystallization;

[0058] (2) Put the purified industrial sodium sulfate as a raw material into the blowing furnace, ignite and heat it to 1100°C with a gas heating gun, turn the industrial sodium sulfate raw material into molten sodium sulfate, and then use a gas spray gun to blow blast furnace gas to blow Refining reduction, reducing molten sodium sulfate to molten sodium sulfide;

[0059] (3) Molten state sodium sulfide is poured out from blowing furnace, casts molding on iron plate, obtains sodium sulfide after cooling;

[0060] (4) The waste gas produced in blowing reduction is injected into the lye absorption tower for absorption treatment.

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Abstract

The invention relates to the technical field of sodium sulfide preparation, and discloses a method for preparing sodium sulfide through reduction of industrial sodium sulfate in molten state. The method comprises the following steps: (1) purifying industrial sodium sulfate; (2) adding the purified industrial sodium sulfate as a raw material into a blowing furnace, igniting and heating the industrial sodium sulfate raw material into molten sodium sulfate, and then spraying Blowing reducing gas for blowing reduction, reducing the molten sodium sulfate to molten sodium sulfide; (3) pouring the molten sodium sulfide out of the blowing furnace, casting and cooling to obtain sodium sulfide. The method uses industrial sodium sulfate with a content of more than 90% as a raw material, uses a blowing furnace as a reduction equipment, and adopts a full-fire method to melt and reduce industrial sodium sulfate to sodium sulfide. The method is simple and environmentally friendly, and the equipment is less corrosive. The purity of sodium is high, and the content is as high as more than 90%.

Description

technical field [0001] The invention relates to the technical field of sodium sulfide preparation, in particular to a method for preparing sodium sulfide through reduction of industrial sodium sulfate in molten state. Background technique [0002] At present, the vanadium extraction process mainly includes sodium vanadium extraction process and calcium vanadium extraction process, and the sodium vanadium extraction process is relatively mature, with high vanadium yield and low cost, but a large amount of industrial sodium sulfate will be produced in the production process, comprehensive utilization The difficulty is great, and the environmental protection pressure of enterprises is great. [0003] The Panzhihua Vanadium Factory of Panzhihua Iron and Steel Vanadium and Titanium Co., Ltd. adopts the process of extracting vanadium by sodium, and produces more than 70,000 tons of industrial sodium sulfate every year. At present, most of the industrial sodium sulfate produced in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/28
CPCC01B17/28C01P2006/80
Inventor 郝建璋黎建明曾冠武
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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