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A method for treating zinc sulfide concentrate based on self-propagating reaction

A zinc sulfide concentrate and self-propagating technology, which is applied in the direction of improving process efficiency, can solve the problems of complex and lengthy process, high energy consumption, high cost, etc., and achieve the effect of simple process, low energy consumption and wide application range

Active Publication Date: 2017-12-01
韶关市晟发再生资源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the invention is to solve the problems of high energy consumption, high cost, high investment, high pollution, complex and lengthy process, etc. brought about by the existing wet and pyrometallurgical processes.

Method used

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  • A method for treating zinc sulfide concentrate based on self-propagating reaction

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Effect test

Embodiment 1

[0034] Soak the separated zinc sulfide concentrate powder in an alkaline solution of sodium hydroxide with a pH of 13 to remove impurities, with a solid-to-liquid ratio of 1:100 (g / mL), a reaction temperature of 30°C, and a reaction time of 4h. Remove impurity silicon and aluminum. After the reaction is filtered, the filter residue is washed with alkaline solution, and the filtrate is used to recover silicon, aluminum, etc. After the filter residue is collected, it is fully dried and crushed for fine grinding. The finely ground ore powder and sodium peroxide are fully stirred and mixed uniformly according to a mass ratio of 1:4, compacted, and placed in a high temperature resistant reaction vessel. The self-propagating reaction is initiated by the chemical ignition method of dripping water. After the reaction product is cooled, it is placed in an alkali-resistant reaction vessel, and zinc is leached with 0.5% sodium hydroxide solution as the leaching agent, the solid-to-liquid ...

Embodiment 2

[0036] Soak the separated zinc sulfide concentrate powder in an alkaline solution of sodium hydroxide with a pH of 12.5 to remove impurities, with a solid-to-liquid ratio of 1:90 (g / mL), a reaction temperature of 35°C, and a reaction time of 3.5h. To remove impurities of silicon and aluminum. After the reaction is filtered, the filter residue is washed with alkaline solution, and the filtrate is used to recover silicon, aluminum, etc. After the filter residue is collected, it is fully dried and crushed for fine grinding. The finely ground ore powder and sodium peroxide are fully stirred and mixed uniformly according to a mass ratio of 1:5, compacted, and placed in a high temperature resistant reaction vessel, and a self-propagating reaction is initiated by microwave ignition. After the reaction product is cooled, it is placed in an alkali-resistant reaction vessel, and zinc is leached with 1% sodium hydroxide solution as the leaching agent, the solid-to-liquid ratio is 1:25 (g / ...

Embodiment 3

[0038] Soak the separated zinc sulfide concentrate powder in an alkaline solution of sodium hydroxide with a pH of 11.8 to remove impurities, with a solid-to-liquid ratio of 1:85 (g / mL), a reaction temperature of 40°C, and a reaction time of 3h. Remove impurity silicon and aluminum. After the reaction is filtered, the filter residue is washed with alkaline solution, and the filtrate is used to recover silicon, aluminum, etc. After the filter residue is collected, it is fully dried and crushed for fine grinding. The finely ground ore powder and sodium peroxide are fully stirred and mixed uniformly according to a mass ratio of 1:4.5, compacted, and placed in a high temperature resistant reaction vessel, and heated by an electric heating plate to initiate a self-propagating reaction. After cooling, the reaction product is placed in an alkali-resistant reaction vessel, and zinc is leached with water as the leaching agent, the solid-liquid ratio is 1:30 (g / mL), the leaching temperat...

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Abstract

The invention discloses a zinc sulfide concentrate processing method based on a self-propagating reaction and belongs to the technical field of nonferrous metallurgy.The environment-friendly zinc sulfide concentrate processing method comprises the steps of removal of silicon and aluminum, self-propagating reaction, zinc leaching through water, impurity removal through sodium sulfide, precipitation of zinc hydroxide and calcination for preparing zinc oxide.The method is characterized in that alkali liquor pretreatment is carried out for removing silicon and aluminum impurities, the purified zinc sulfide concentrate powder and sodium peroxide powder are mixed and compacted, the mixture is placed into a high-temperature resistance reaction container, and the self-propagating reaction is triggered; water is used as a leaching agent for leaching the reaction product, and zinc-containing leaching solution is obtained through filtration; sodium sulfide is adopted for removing lead and copper impurities, the solution is precipitated after purification to recycle Zn(OH)2, and the ZnO product is prepared after calcination.The zinc leaching rate reaches up to 98%, and the obtained zinc oxide powder meets industrial production standards.According to the method, process control is easy, the cost is low, energy consumption is extremely low, no pollution gas is produced, carbon emission is low, and zinc in zinc sulfide concentrate is efficiently and rapidly leached and extracted.

Description

Technical field [0001] The invention belongs to the technical field of non-ferrous metallurgy, and particularly relates to a method for applying a self-propagating reaction to treat zinc sulfide concentrates in a green, fast, and low-energy-consumption manner and recover and extract zinc oxide. Background technique [0002] The mineral raw materials of zinc are mainly divided into sulfide ore and oxide ore. Zinc sulfide ore accounts for the vast majority and zinc oxide ore accounts for a very small part. At present, the most important raw material for industrial zinc production in the world is zinc sulfide concentrate, which accounts for more than 90% of the world's zinc smelting raw materials. The main components of zinc sulfide concentrate are generally w (Zn) 45-60%, w (S) 30-35%, w (Fe) 5-15%, w (Pb) 0.8-1.5%, w (Si) 0.2- 2%, w (Cu) 0.01 to 1%, w (Al) 0.1 to 0.5%. The technology of zinc smelting can be roughly divided into two categories: fire process and wet process. Among...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/04C22B3/12C22B19/20C22B19/02
CPCC22B3/04C22B3/12C22B19/02C22B19/20C22B19/24Y02P10/20
Inventor 殷晓飞吴玉锋李彬章启军谭哲
Owner 韶关市晟发再生资源科技有限公司
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