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Method for producing zinc by use of high-silicon zinc oxide ore

A zinc oxide ore, high silicon technology, applied in the direction of improving process efficiency, can solve the problems of increasing production cost, reducing safety, and high stirring speed, and achieving the effects of improving production efficiency, improving safety, and low stirring speed

Inactive Publication Date: 2010-05-19
YUNNAN METALLURGICAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the stirring speed controlled by this method is too high during leaching, and it is difficult to solve the high-pressure sealing problem in industry at such a high speed, and the high speed will cause the motor to overheat and burn out, so it is difficult to achieve in practice; in addition, use industrial oxygen or oxygen-enriched Air maintains the pressure in the reactor, and oxygen needs to be produced separately, and the pressure in the reactor is above 0.8MPa, which also leads to difficult sealing and reduced safety, which will inevitably increase investment and increase production costs

Method used

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  • Method for producing zinc by use of high-silicon zinc oxide ore
  • Method for producing zinc by use of high-silicon zinc oxide ore
  • Method for producing zinc by use of high-silicon zinc oxide ore

Examples

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no. 1 example

[0041] According to the first embodiment of the present invention, the composition of the used high-silicon zinc oxide ore is as follows: Zn20%, wherein Zn 2 SiO 4 Morphology Existing Zn7.82%, SiO 2 17.35%, Fe 0.68%, finely grind 90% of the high-silicon zinc oxide ore and pass through a 0.044mm sieve.

[0042] Mix the finely ground high-silicon zinc oxide ore and water at a mass ratio of 0.8:1, and preheat to 60°C. At the same time, add concentrated sulfuric acid to the zinc electrolysis waste liquid, adjust the acid concentration to 220g / L, and preheat it to 90°C. Use a diaphragm metering pump and an acid-resistant pressure metering pump to continuously transport the ore slurry and zinc-containing hot sulfuric acid solution to an effective volume of 25m3 at a volume ratio of 1:3. 3 In the industrial autoclave, air was introduced to maintain the pressure of 0.8MPa, the stirring speed was 300r / min, the temperature was controlled at 130°C, and the leaching time was 180min. A...

no. 2 example

[0045] According to the second embodiment of the present invention, the composition in the used high silicon zinc oxide ore is:

[0046] Zn is 32.46%, where Zn 2 SiO 4 The morphological existence of Zn is 27.86%, SiO 2 It is 27.12%, Fe is 4.27%, and 90% of the ore is finely ground through a 0.044mm sieve.

[0047] Mix the finely ground high-silicon zinc oxide ore and water at a mass ratio of 0.7:1, and preheat to 50°C. At the same time, add concentrated sulfuric acid to the zinc electrolysis waste liquid to adjust the acid concentration to 200g / L, and preheat to 70°C. Use the diaphragm metering pump and the acid-resistant pressure metering pump to continuously transport the hot ore slurry and zinc-containing hot sulfuric acid solution at a volume ratio of 1:4 to an effective volume of 25m 3 In the industrial autoclave, the pressure in the industrial autoclave is maintained at 0.6MPa by feeding air, the stirring speed of each chamber in the industrial autoclave reaches 250r...

no. 3 example

[0050] According to the third embodiment of the present invention, the composition of the high silicon zinc oxide ore used is as follows: Zn40%, wherein Zn 2 SiO 4 Morphology Existing Zn5.41%, SiO 2 50%, Fe2.49%, 90% of the ore is finely ground through a 0.044mm sieve.

[0051] Mix the finely ground high-silicon zinc oxide ore and water at a mass ratio of 0.7:1, and preheat to 50°C. At the same time, adjust the acid concentration of the zinc electrolytic waste liquid to 150g / L, and preheat it to 60°C. Use a diaphragm metering pump and an acid-resistant pressure metering pump to continuously transport the hot ore slurry and zinc-containing hot sulfuric acid solution to an industrial pressure kettle with an effective volume of 25m3 at a volume ratio of 1:5, and feed air to maintain the pressure at 0.5MPa. Stir in each chamber The rotation speed is 200r / min, the control temperature is 110°C, and the leaching time is 60min. After leaching, the pulp is continuously sent to the ...

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Abstract

The invention provides a method for producing zinc by use of high-silicon zinc oxide ore. The method comprises the following steps: grinding high-silicon zinc oxide ore and mixing the obtained product with water in a mass ratio of 0.7-0.8:1; heating the mixture to 40 to 60 DEG C and preparing hot ore pulp; preheating H2SO4 solution in a concentration of 150 to 220 g / L to 40 to 90 DEG C; continuously conveying the hot ore pulp and hot sulfuric acid solution in a volume ratio of 1:3-5 into a reaction container; supplying air to ensure that the pressure in the reaction container is 0.4 to 0.8 MPa; performing reaction for 30 to 180 minutes at a temperature kept between 80 and 130 DEG C at a stirring speed of 200 to 300 revolutions per minute so as to leach zinc; forming leaching solution from leaching slurry discharged from the reaction container through liquid-solid separation; adopting a conventional zinc hydrometallurgy process to treat the leaching solution; and producing the zinc through iron removal, purification, electrowinning and melt casting. The method for producing zinc has the characteristics of high leaching efficiency, high safety, reaction conditions easy to realize, low production cost and the like.

Description

technical field [0001] The invention relates to the metallurgical technology of high-silicon zinc oxide ore, in particular to a method for producing zinc by treating high-silicon zinc oxide ore with air pressure acid leaching. Background technique [0002] Zinc oxide ore mainly refers to zinc silicate ore (Zn 2 SiO 4 ), hemimorphite [Zn 4 (Si 2 o 7 )(OH)·H 2 O] and smithsonite (ZnCO 3 )Wait. my country is rich in zinc oxide ore resources, especially in Yunnan, China, almost all over the province, but most of them belong to high-silicon type zinc oxide ore, that is, more than 5% of Zn in zinc ore exists in the form of zinc silicate. [0003] Since the grade of zinc contained in this kind of ore is far lower than that of zinc sulfide ore, the process of using it to produce zinc is relatively complicated. In the early days, pyrolysis enrichment treatment was mostly used, but it was restricted due to problems such as high fuel consumption indicators, poor working conditi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B19/20C22B3/08
CPCY02P10/20
Inventor 王吉坤阎江峰彭建蓉张安福朱国帮赵群张红耀孟波
Owner YUNNAN METALLURGICAL GROUP
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