Sodium sulfide production method based on solid waste sodium sulfate generated from vanadium extraction

A sodium sulfide and sodium sulfate technology, applied in the direction of alkali metal sulfide/polysulfide, energy input, etc., can solve the problems of large coal consumption, unfavorable environmental protection, high cost, etc., to reduce raw material costs, reduce pollution, reduce The effect of dosage

Inactive Publication Date: 2017-03-15
攀枝花市博信化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the purity requirements of the raw materials used are relatively high, and the cost is high. At the same time, the consumption of pulverized coal is large during the production process, and more waste residues are produced, which is not conducive to environmental protection.

Method used

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  • Sodium sulfide production method based on solid waste sodium sulfate generated from vanadium extraction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A: Before weighing the solid waste sodium sulfate, use the waste heat of the converter to dry the solid waste sodium sulfate; crush the particle size of the coke powder to less than 1mm; weigh 8593kg of solid waste sodium sulfate, 1422kg of coke powder and 42kg of barium sulfide into the In the converter;

[0050] B: Heating the converter with gas to a temperature of 850°C and roasting for 90 minutes to generate alkali slag and molten sodium sulfide;

[0051] C: Cool the molten sodium sulfide described in step B naturally, lower the temperature to 500°C and put it into a thermal leaching tank; using the chemical properties of sodium sulfide dissolved in water, sodium sulfide enters hot water at a temperature of 80°C and dissolves, after stirring After dissolving, use a three-stage spiral elevator to wash the slag and remove the coarse slag to obtain the coarse slag and a first-grade sodium sulfide aqueous solution; wash and filter the coarse slag produced in step C and ...

Embodiment 2

[0056] A: Before weighing the solid waste sodium sulfate, use the waste heat of the converter to dry the solid waste sodium sulfate; crush the particle size of the coke powder to less than 1mm; weigh 8536kg of solid waste sodium sulfate, 1373kg of coke powder and 34kg of barium sulfide into the In the converter;

[0057] B: Heating the converter with coal gas to a temperature of 1100°C and roasting for 80 minutes to generate alkali slag and molten sodium sulfide;

[0058] C: Cool the molten sodium sulfide described in step B naturally, lower the temperature to 500°C and put it into a thermal leaching tank; using the chemical properties of sodium sulfide dissolved in water, sodium sulfide enters the hot water and dissolves at 100°C, after stirring After dissolving, use a three-stage spiral elevator to wash the slag and remove the coarse slag to obtain the coarse slag and a first-grade sodium sulfide aqueous solution; wash and filter the coarse slag produced in step C and use it...

Embodiment 3

[0063] A: Before weighing the solid waste sodium sulfate, use the waste heat of the converter to dry the solid waste sodium sulfate; crush the particle size of the coke powder to less than 1mm; weigh 8556kg of solid waste sodium sulfate, 1390kg of coke powder and 38kg of barium sulfide into the In the converter;

[0064] B: Heating the converter with gas to a temperature of 900°C and roasting for 85 minutes to generate alkali slag and molten sodium sulfide;

[0065] C: Cool the molten sodium sulfide described in step B naturally, lower the temperature to 500°C and put it into a thermal leaching tank; using the chemical properties of sodium sulfide dissolved in water, sodium sulfide enters hot water and dissolves at a temperature of 90°C, after stirring After dissolving, use a three-stage spiral elevator to wash the slag and remove the coarse slag to obtain the coarse slag and a first-grade sodium sulfide aqueous solution; wash and filter the coarse slag produced in step C and ...

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Abstract

The invention belongs to the technical field of sodium sulfide production, and particularly relates to a sodium sulfide production method based on waste sodium sulfate generated from metallurgical vanadium extraction. In order to solve the technical problems of high cost, big coal powder consumption, and large amounts of generated slag in the prior art, thus being detrimental to environmental protection, the sodium sulfide production method based on waste sodium sulfate generated from vanadium extraction is provided. The method comprises the steps of A, preparing materials, B, roasting, C, thermalizing and leaching, D, deslagging and clarifying, and E, evaporating and concentrating. The method uses the solid waste sodium sulfate generated from vanadium extraction as the material for a second time use, thus reducing the material cost. The use of fine coke as the reducer to replace the coal powder used in traditional production process, reduces the material consumption. The method applies the production process of material preparation, roasting, thermalizing and leaching, deslagging and clarification, evaporation, concentration and crystallization, and has the advantages of being lower in production cost, friendlier to environment, and able to produce better economic benefits and environmental protection benefits.

Description

technical field [0001] The invention belongs to the technical field of sodium sulfide production, and in particular relates to a method for using solid waste sodium sulfate produced in a metallurgical vanadium extraction process to produce sodium sulfide. Background technique [0002] Sodium sulfide is also called smelly alkali, smelly soda, yellow alkali, and alkali sulfide. Sodium sulfide is an inorganic compound, and pure sodium sulfide is a colorless crystalline powder. Strong hygroscopicity, easily soluble in water. The aqueous solution is a strong alkaline reaction. Causes burns on contact with skin and hair. So sodium sulfide is commonly known as alkali sulfide. Sodium sulfide aqueous solution will be slowly oxidized into sodium thiosulfate, sodium sulfite, sodium sulfate and sodium polysulfide in air. [0003] The existing production methods of sodium sulfide mainly include pulverized coal reduction method, absorption method, barium sulfide method and gas reduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/26
CPCY02P20/129C01B17/26
Inventor 赵成刚
Owner 攀枝花市博信化工有限责任公司
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