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Method for producing zinc carbonate by utilizing ironmaking dust

A zinc carbonate and soot technology, applied in the preparation of carbonate/acid carbonate, chemical instruments and methods, zinc compounds, etc., can solve the problems of poor quality of zinc products, waste gas and dust, environmental pollution, etc. Good selectivity, small flue gas volume and good product quality

Inactive Publication Date: 2010-07-07
LOUDI XINYUAN YOUSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current method of its treatment is generally to use the high-temperature volatilization process of the rotary kiln to recover the zinc in the form of defective zinc oxide. If it is less than 70%, the corresponding zinc content is only between 40% and 50%, and the energy consumption is high. environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] 1. Take 90kg of blast furnace ironmaking dust with a zinc content of 8-12%, add 9kg of ammonium bicarbonate, 8kg of ammonia, and 200kg of water into a closed container, and stir evenly for 30 minutes at a temperature of 50°C;

[0012] 2. The mixed liquid obtained in step 1 is subjected to liquid-solid separation and washing treatment using a conventional liquid-solid separation and washing treatment method, and the solid phase slag is removed to obtain a leaching solution;

[0013] 3. Pour the soaking solution obtained in step 2 into a container with stirring and heating functions, and perform ammonia distillation treatment in the conventional ammonia distillation treatment method. Then it is absorbed by the four-stage ammonia leaching tower to recover the ammonia and carbon dioxide.

[0014] 4. Carry out liquid-solid separation of the slurry obtained in step 3 through ammonia distillation using a conventional liquid-solid separation treatment method to obtain a zinc ca...

Embodiment 2

[0016] 1. Take 11t of blast furnace ironmaking dust with a zinc content of 8-12%, add 1.3t of ammonium bicarbonate, 1.2t of ammonia, and 22t of water into a closed container, and stir evenly for 60 minutes at a temperature of 50°C;

[0017] 2. The mixed liquid obtained in step 1 is subjected to liquid-solid separation and washing treatment using a conventional liquid-solid separation and washing treatment method, and the solid phase slag is removed to obtain a leaching solution;

[0018] 3. Pour the soaking solution obtained in step 2 into a container with stirring and heating functions, and perform ammonia distillation treatment in the conventional ammonia distillation treatment method.

[0019] 4. Carry out liquid-solid separation of the slurry obtained in step 3 through ammonia distillation to obtain a zinc carbonate product.

[0020] The product of above embodiment 1 and 2 is solid phase powder, and color and luster is pure and white, does not need to wash, and its dry bas...

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PUM

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Abstract

The invention discloses a method for producing zinc carbonate by utilizing ironmaking dust, which adopts the following raw materials and the process: 1. taking 90 to 110kg of blast-furnace ironmaking dust, adding 9 to 13kg of ammonium bicarbonate, 8 to 12kg of ammonia and 200 to 220kg of water and then evenly stirring; 2. carrying out liquid solid separation and washing treatment on obtained mixed liquor to obtain leachate; 3. carrying out ammonia distillation treatment to recover ammonia and carbon dioxide; and 4. carrying out liquid solid separation on obtained slurry to obtain zinc carbonate products. The dominant procedure of the invention belongs to a wet process, wherein the yield consumption ratio of zinc coal does not exceed 1:2, the energy consumption is low and the amount of flue gas is low, thereby being easy to realize the discharge reaching the standard of waste gas. Ammonia and carbon dioxide can be completely utilized, and therefore, the production cost is low. Moreover, ammonia and complexes thereof have good selectivity on extraction, and the extraction and purification can be integrated, thereby enabling the product quality to have advantages, and the content of zinc products reaches over 96%.

Description

technical field [0001] The invention relates to a method for producing zinc carbonate by using ironmaking blast furnace dust. Background technique [0002] The ironmaking process in steel production produces a large amount of soot waste, which contains valuable components such as iron, carbon, zinc, and lead. The current method of its treatment is generally to use the high-temperature volatilization process of the rotary kiln to recover the zinc in the form of defective zinc oxide. If it is lower than 70%, the corresponding zinc content is only between 40% and 50%, and the energy consumption is high. environmental pollution. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for producing zinc carbonate by utilizing ironmaking fumes to overcome the defects of the above technical conditions. [0004] The technical solution of the present invention is that the method for producing zinc carbonate by utilizi...

Claims

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Application Information

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IPC IPC(8): C01G9/00C01B31/24C01B32/60
Inventor 秦纯李志仁
Owner LOUDI XINYUAN YOUSE TECH