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A kind of leaching method that recovers zinc from zinc oxide ore

A zinc oxide ore and leaching technology, which is applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of deteriorating leaching environment, poor selectivity, and easy corrosion of equipment, and achieve the effect of low process cost and simple operation

Inactive Publication Date: 2017-09-05
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of these inorganic acid leaching agents has the disadvantages of poor selectivity, difficulty in purifying the leachate, and easy corrosion of equipment; especially the application of inorganic acids to leaching zinc oxide ores containing a large amount of alkaline gangue minerals such as calcium and magnesium requires a large amount of acid consumption. A large amount of carbon dioxide gas is produced, which deteriorates the leaching environment and affects the leaching effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] An embodiment of the present invention provides a leaching method for recovering zinc from zinc oxide ore. The method includes: crushing and grinding zinc oxide ore with a zinc content of 31.89%, and the weight percentage of the ore with a particle size of less than 65 μm is 75% %; under the condition that the control leaching temperature is 25 ℃ and the liquid-solid ratio is 20:1, the 5-sulfosalicylic acid solution and the zinc oxide mineral powder are mixed in the reactor with a concentration of 0.05mol / L, fully Stir for 36 minutes, and react to obtain a zinc-containing solution suitable for the next step of extraction and electrowinning. The zinc leaching rate is 90.98%.

[0021] The zinc oxide ore oxidation rate is about 90%. The zinc minerals in it are complex in distribution and fine in particle size, mainly smithsonite, and closely symbiotic with gangue minerals. The gangue is mainly composed of calcium magnesium carbonate and Mainly quartz; CaO, MgO and SiO2 ch...

Embodiment 2

[0023] An embodiment of the present invention provides a leaching method for recovering zinc from zinc oxide ore. The method includes: crushing and grinding zinc oxide ore with a zinc content of 40.20%, and the weight percentage of the ore with a particle size of less than 65 μm is 80% ; Under the condition that the leaching temperature is controlled at 30°C and the liquid-solid ratio is 15:1, the 5-sulfosalicylic acid solution with a concentration of 0.1mol / L is mixed with the zinc oxide ore powder in the reactor, fully stirred After 32 minutes, the reaction yielded a zinc-containing solution suitable for the next step of extraction and electrowinning. The zinc leaching rate is 93.59%.

[0024] The zinc oxide ore oxidation rate is about 90%. The zinc minerals in it are complex in distribution and fine in particle size, mainly smithsonite, and closely symbiotic with gangue minerals. The gangue is mainly composed of calcium magnesium carbonate and Mainly quartz; CaO, MgO and S...

Embodiment 3

[0026] An embodiment of the present invention provides a leaching method for recovering zinc from zinc oxide ore. The method includes: crushing and grinding zinc oxide ore with a zinc content of 43.16%, and the weight percentage of the ore with a particle size of less than 65 μm is 85% ; Under the conditions of controlling the leaching temperature to 40°C and the liquid-solid ratio of 15:1, mix the 5-sulfosalicylic acid solution with a concentration of 0.15mol / L and the zinc oxide ore powder in the reactor, and fully stir for 36min , and react to obtain a zinc-containing solution suitable for the next step of extraction and electrowinning. The zinc leaching rate is 95.96%.

[0027] The zinc oxide ore oxidation rate is about 90%. The zinc minerals in it are complex in distribution and fine in particle size, mainly smithsonite, and closely symbiotic with gangue minerals. The gangue is mainly composed of calcium magnesium carbonate and Mainly quartz; CaO, MgO and SiO2 chemical a...

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Abstract

The invention belongs to the technical field of mineral metallurgy, and concretely discloses a leaching method for recovering zinc from zinc oxide ores. The method comprises the following steps: crushing the zinc oxide ores with the zinc content of 20-70%, and milling to obtain ore powder, wherein ore powder with the granularity of below 65[mu]m accounts for 75-95% of the weight of all the ore powder; and mixing a 5-sulfosalicylic acid solution with the concentration of 0.05-0.50mol / L with the zinc oxide ore powder in a reactor at a controlled leaching temperature of 20-60DEG C under a liquid / solid ratio of 5-20:1, fully stirring for 30-60min, and reacting to obtain a zinc-containing solution suitable for later extraction and electrodeposition. The leaching method has the advantages of high leaching efficiency of zinc from the zinc oxide ores, simple operation, environmental pollution reduction, green zinc recovery facilitating, guaranteeing of the high zinc leaching rate without high temperature or a pressurizing device, and low process cost.

Description

technical field [0001] The invention belongs to the technical field of mineral metallurgy, and in particular relates to a leaching method for recovering zinc from zinc oxide ore. Background technique [0002] Zinc is an important non-ferrous metal with a wide range of applications. There are large deposits of zinc oxide ores around the world, especially in China and Turkey. Nowadays, as sulfide ore resources are becoming less and less, these zinc oxide ores have become important zinc ore resources, and the technology of extracting zinc from zinc oxide is constantly developing. At present, the treatment methods of zinc oxide ore mainly include pyrometallurgy and hydrometallurgy. Pyrometallurgy will cause serious environmental pollution. In contrast, hydrometallurgy can better meet the requirements of the environment, with high metal leaching rate and low cost. [0003] At present, the acid leaching process for treating zinc oxide ore mainly uses sulfuric acid and nitric ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/04C22B13/00C25C1/18
CPCY02P10/20
Inventor 邓久帅吴丹丹文书明刘丹张英柏少军刘建先永骏贾陆和
Owner KUNMING UNIV OF SCI & TECH