Rotational flow grading-ionic liquid-ultrasonic synergistic selective zinc immersion method

A technology of ionic liquid and cyclone classification, which is applied in the field of hydrometallurgy, can solve the problems of secondary pollution reaction conditions, poor leaching selectivity, and high cost of leaching agents, and achieve low reaction temperature, low liquid-solid ratio, and high leaching efficiency. Effect

Active Publication Date: 2022-04-12
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problems of high cost of leaching agent, difficult preservation, poor leaching selectivity, low leaching rate, easy to cause secondary pollution and complex reaction conditions in the existing conventional acid or ammonia leaching process agents. A Synergistic Selective Zinc Dipping Method Utilizing Cyclone Classification-Ionic Liquid-Ultrasonic

Method used

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  • Rotational flow grading-ionic liquid-ultrasonic synergistic selective zinc immersion method
  • Rotational flow grading-ionic liquid-ultrasonic synergistic selective zinc immersion method
  • Rotational flow grading-ionic liquid-ultrasonic synergistic selective zinc immersion method

Examples

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Effect test

Embodiment 1

[0042] In this embodiment, choline chloride and malonic acid are synthesized to prepare ionic liquid for leaching and extracting zinc in zinc-containing dust. The specific steps are as follows:

[0043] Classification and enrichment of zinc-containing dust and sludge: use special-shaped hydrocyclones to classify and enrich zinc-containing dust and sludge, the classification particle size is 0.018mm, and -300 mesh accounts for 95% of the classified products. Fine-grained and intermediate-grained products are used for leaching and zinc extraction after filtration and dehydration.

[0044] Ionic liquid synthesis: dry a certain amount of choline chloride and malonic acid, put them into a vacuum drying oven, set the temperature of the drying oven at 353K, the relative vacuum at –0.05Mpa, and the drying time for 12h. The dried choline chloride and malonic acid were weighed and added into a 1L beaker at a molar ratio of 1:2 and mixed thoroughly. The beaker was placed in a 353K vacuum...

Embodiment 2

[0047] In this embodiment, choline chloride and urea are used to synthesize and prepare an ionic liquid for leaching and extracting zinc from zinc-containing dust. The specific steps are as follows:

[0048] (1) Classification and enrichment of zinc-containing dust and sludge: use special-shaped hydrocyclones to classify and enrich zinc-containing dust and sludge, the classification particle size is 0.018mm, and -300 mesh in the classified products accounts for 97% . Fine-grained and intermediate-grained products are used for leaching and zinc extraction after filtration and dehydration.

[0049] (2) Synthesis of ionic liquid: dry a certain amount of choline chloride and urea, put them into a vacuum drying oven, set the temperature of the drying oven at 353K, the relative vacuum degree at –0.05Mpa, and the drying time for 12h. The dried choline chloride and urea were weighed and added to a 1L beaker at a molar ratio of 1:2 and mixed thoroughly. The beaker was placed in a 333K...

Embodiment 3

[0052] In this embodiment, choline chloride and malonic acid are synthesized to prepare ionic liquid for leaching and extracting zinc in zinc-containing dust. The specific steps are as follows:

[0053] (1) Classification and enrichment of zinc-containing dust and sludge: Use special-shaped hydrocyclones to classify and enrich zinc-containing dust and sludge. The classification particle size is 0.018mm. Among the classified products, -300 mesh accounts for 96% of the fine-grained and intermediate-sized products. . Fine-grained and intermediate-grained products are used for leaching and zinc extraction after filtration and dehydration.

[0054] (2) Synthesis of ionic liquid: dry a certain amount of choline chloride and malonic acid, put them into a vacuum drying oven, set the temperature of the drying oven to 353K, the relative vacuum to –0.05Mpa, and the drying time to be 12h . The dried choline chloride and malonic acid were weighed and added into a 1L beaker at a molar rat...

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Abstract

The invention discloses a method for selective zinc immersion through cyclone classification-ionic liquid-ultrasonic cooperation, and belongs to the technical field of hydrometallurgy. The method comprises the steps of graded enrichment of zinc-containing dust mud, synthesis of ionic liquid and selective leaching of zinc. According to the method, the special-shaped hydrocyclone is used for pretreating the zinc-containing dust sludge to obtain fine-grain zinc-rich dust sludge, so that efficient leaching of zinc is facilitated, and meanwhile, opening and dispersing of floccules in the zinc-containing dust sludge are facilitated; the ionic liquid and ultrasonic synergistic leaching system has selective dissolving capacity on ZnO, the obtained zinc-containing leaching solution is high in purity, and the problems that components are complex, separation is difficult and the like in a traditional leaching system are solved.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a selective zinc immersion method utilizing cyclone classification-ionic liquid-ultrasonic synergy. Background technique [0002] In recent years, with the rapid development of my country's industry, the demand for zinc resources in various fields has continued to grow. The proportion of my country's zinc consumption in global zinc consumption has increased from 15.18% in 2000 to more than 50% by 2020, with a total output of 642 tons. At present, the recovery of zinc from zinc-containing waste is becoming an important way to obtain zinc resources. As a typical waste, zinc-containing dust has become an important source of raw materials for recycled zinc with the rapid development of the iron and steel industry. However, zinc-containing waste has a wide range of sources, great differences in quality, and the secondary pollution and waste of resources that are easily caused ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/00C22B19/20C22B19/30
CPCY02P10/20
Inventor 牛福生何胜滔张晋霞董佳静
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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