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Comprehensive utilization method of acid sludge generated in acid making by smelting fume

A technology for producing acid and acid mud from flue gas, which is applied in chemical instruments and methods, silicates, arsenic compounds, etc., can solve the problems of maximum separation of arsenic and metals, etc., and achieve a high degree of economical and refined utilization and a large economy Value, the effect of a wide range of adaptation

Inactive Publication Date: 2012-08-22
宫毅 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitations of smelting and extraction of useful substances in acid mud, the use of liquid phase method to extract useful substances has become the focus of professional research. However, the maximum separation of arsenic and metals in the recovery and utilization of useful substances in acid mud by liquid phase method has become a difficult problem.

Method used

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  • Comprehensive utilization method of acid sludge generated in acid making by smelting fume

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] The first step is to prepare sodium fluoride

[0070] 1. Raw material pretreatment: put 100g of acid mud and 600ml of water into a beaker for stirring and washing for 15 minutes, and the stirring speed is 250 rpm; then the washing mixture is filtered through a filter, and then the filter cake is washed with water. After the filter cake enters the heating and hydrolysis process, the filtrate and the washing solution are returned to the pretreatment and continue to be used as washing water for recycling; when the washing solution contains high salt, it is used as the alkaline leaching solvent preparation water in a heating leaching process;

[0071] 2. Heating and hydrolysis: put 100g of the pre-filtered filter cake and 600ml of water into a beaker, move the beaker into a water bath filled with water, set the temperature of the water bath to 100°C, and the stirring speed at 250 rpm. Hydrolysis under heating for 15 minutes. The mixed solution after hydrolysis is subjected...

Embodiment 2

[0106] The first step is to prepare sodium fluoride

[0107] 1. Raw material pretreatment: 100g of acid mud and 700ml of water were put into a beaker for stirring and washing for 20 minutes, and the stirring speed was 200 rev / min; the rest was the same as in Example 1;

[0108] 2. Heating and hydrolysis: put 100g of the pre-filtered filter cake and 800ml of water into a beaker, move the beaker into a water bath with water, set the temperature of the water bath to 100°C, and the stirring speed of 200 rpm. Under heating and hydrolysis for 30 minutes;

[0109] 3. Filtration and washing process: the same as in Example 1;

[0110] 4. Dosing and synthesis: Add 30 g of sodium carbonate to the beaker of clear liquid after precipitation under stirring, the pH is 8, the reaction time for dosing and synthesis is 40 minutes, and the stirring speed is 250 rpm;

[0111] 5. Primary precipitation: the same as in Example 1;

[0112] 6. Filtration and washing: the same as in Example 1;

[0...

Embodiment 3

[0140] The first step is to prepare sodium fluoride

[0141] 1. Pretreatment of raw materials: 100g of acid mud and 800ml of water were put into a beaker for stirring and washing for 30 minutes, and the stirring speed was 250 rev / min; the rest was the same as in Example 1;

[0142] 2. Heating and hydrolysis: put 100g of pre-filtered filter cake and 800ml of water into a beaker, move the beaker into a water bath with water, set the temperature of the water bath to 100°C, and stir at 230 rpm. Under heating and hydrolysis for 25 minutes;

[0143] 3. Filtration and washing process: the same as in Example 1;

[0144] 4. Dosing and synthesis: add 45 g of sodium carbonate to the beaker after precipitation, the pH is 10, the reaction time for dosing and synthesis is 20 minutes, and the stirring speed is 250 rpm;

[0145] 5. Primary precipitation: the same as in Example 1;

[0146] 6. Filtration and washing: the same as in Example 1;

[0147] 7. Secondary precipitation: the same as...

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Abstract

The invention provides a comprehensive utilization method of acid sludge generated in acid making by smelting fume. The acid sludge generated in acid making and containing substances such as metal, fluosilicate, selenium, selenium, arsenic and the like is taken as a raw material to prepare sodium fluoride, elementary substance selenium, silicon dioxide hydrate or water glass and arsenic sulfide products; and a material with high metal content is provided for smelting. The comprehensive utilization method breaks through the limitation that only the metal substance can be smelted and extracted in the traditional acid sludge recycling-utilizing mode, maximally recycles fluorine, selenium, arsenic, silicon and metal substances and prepares respective product of the substances, and thoroughly solves the difficult problems that fluorine, selenium and arsenic are easy to volatilize in smelting and extracting of the metal and difficult to recycle and arsenic is difficult to be separated from the metal in a liquid phase method; and extraction and preparation technologies are simple, product diversification is realized, and the utilization degree of economy refining is high. The comprehensive utilization method is wide in application range and applicable to acid sludge generated in acid making by purification of not only nonferrous smelting sulfur-containing fume but also ferrous smelting sulfur-containing fume.

Description

technical field [0001] The invention belongs to a comprehensive utilization method of acid mud produced by sulfuric acid production by purifying flue gas from metal sulfide mineral smelting, in particular a method for preparing fluorine, selenium, silicon and arsenic products from acid mud in flue gas acid production. Background technique [0002] With the rapid development of my country's sulfide metal mineral metallurgy industry, the rapid development of sulfur-containing flue gas acid production industry is promoted; and the rapid development of flue gas acid production industry, the multi-source of smelting raw materials and the wet purification of acid production flue gas and acid water The improvement and perfection of the treatment system will bring about an increase in the output of acid mud, an increase in the types of useful substances contained in it, and an increase in the consumption of water glass for flue gas purification. According to detection and analysis, t...

Claims

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Application Information

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IPC IPC(8): C01D3/02C01B19/02C01B33/12C01B33/32C01G28/00
Inventor 宫毅赵书运
Owner 宫毅
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