Method for producing high purity metal zinc from zinc oxide ore

A technology for zinc oxide ore and metal zinc, which is applied in the direction of improving process efficiency, can solve the problems of low total zinc recovery rate, environmental pollution, waste of resources, etc., and achieves low price, good economic and social benefits, and reduced production costs. Effect

Inactive Publication Date: 2006-02-01
昆明同越科技开发有限公司
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Problems solved by technology

In this production process, the total recovery rate of zinc is lower than 60%, and the waste of resources and environmental pollution are quite serious

Method used

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  • Method for producing high purity metal zinc from zinc oxide ore
  • Method for producing high purity metal zinc from zinc oxide ore

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Please refer to the attached figure 1 . First of all, the zinc oxide ores produced in Kunming, Yunnan, mainly including smithsonite and red zinc ore, are selected. The main components of these two ores are zinc carbonate, zinc silicate and zinc oxide (ZnCO 3 , Zn 2 SiO 4 , 2ZnCO 3 3Zn(OH) 2 , ZnO, Zn 2 SiO 3 h 2 O) and lead, both of which are readily soluble in strong alkaline solutions. Then crush the zinc oxide ore to 0.1-0.8mm. Then, leaching with industrial caustic soda solution: immerse 1 ton of zinc oxide ore into 3-10 cubic meters of industrial caustic soda solution and feed, the leaching temperature is controlled at 95°C, the concentration of industrial caustic soda solution is 5-10M, and the After reacting for 90 minutes under the condition of slow stirring, the extraction rates of zinc and lead in the ore are 98% and 93% respectively. Filter, discharge the filter residue, and add a separating agent to the filtrate. Separating agent is sodium sulfi...

Embodiment 2

[0016] First, the zinc oxide ores in Guiyang, including smithsonite and red zinc ore, were selected. The main components of these two ores are zinc carbonate, zinc silicate and zinc oxide (ZnCO 3 , Zn S iO 4 , 2ZnCO 3 3Zn(OH) 2 , ZnO, Zn 2 SiO 3 h 2 O,) and lead and trace copper, iron, they are all easily soluble in strong alkali solution. Then, crush the zinc oxide ore to 0.5-1mm. Then, leaching with calcium hydroxide solution: immerse 1 ton of zinc oxide ore into 3 cubic meters of calcium hydroxide solution and feed, the leaching temperature is controlled at 100 ° C, the concentration of calcium hydroxide solution is 10M, and the slow speed of 120 rpm After reacting for 100 minutes under the condition of high-speed stirring, the extraction rates of zinc and lead in the ore are both 100%. Next, after the zinc and lead in the zinc oxide ore are leached, it is filtered while it is hot, and the filter residue is washed with the above-mentioned concentration of calcium h...

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Abstract

The method for producing high-purity metal zinc by using low-grade zincite ore as raw material includes the following steps: firstly, pulverizing zincite ore into the zincite ore powder whose grain size is 0.1-1mm, soaking in strong alkaline solution, slowly stirring for 60-100 min, at 10-100 deg.C to extract the zinc and lead from zincite ore, filtering, discharging filter residue for making brick or burying, then adding dispersing agent whose added quantity is 0.1-5 times (mole ratio) lead content into the filtrate containing zinc and lead, stirring for 60-100 min., filtering, precipitating separated lead and electrolyzing the filtrate containing zinc, finally, depositing and obtaining metal zinc whose purity is above 99.95% on the cathode.

Description

technical field [0001] The invention relates to a process for producing high-purity metal zinc by using low-grade zinc oxide ore as a raw material. technical background [0002] High-purity metal zinc has a wide range of uses and can be used to make alloys (such as brass, bronze, zinc die-cast alloys, etc.), white iron, dry batteries, fireworks, zinc plates, chemical reagents, etc. Zinc powder made from high-purity metal zinc is a strong reducing agent and can be used in organic synthesis, dye preparation, and gold and silver smelting. At present, the traditional production of high-purity zinc metal both at home and abroad uses high-grade sphalerite (sphalerite) with a zinc content of more than 40% as raw material. Steps to obtain, commonly known as acid production of zinc. However, on the one hand, the reserves of this high-grade sphalerite (namely zinc sulfide ore) have become less and less, which is a scarce mineral. On the other hand, although ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/12C22B3/46C22B19/00
CPCY02P10/20
Inventor 赵由才易天晟
Owner 昆明同越科技开发有限公司
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