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Comprehensive utilization and activation method of waste charcoal powder

An activation method and technology of charcoal powder, which are applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve problems such as ecological environment pollution, and achieve the effects of good adsorption performance, industrialization, and wide cost sources.

Active Publication Date: 2016-01-20
KUNMING UNIV OF SCI & TECH
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  • Description
  • Claims
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Problems solved by technology

The purpose of the present invention is to comprehensively utilize a large amount of charcoal powder and walnut shell and pine nut shell mixed gasification products produced in the industrial silicon production process with high added value, and also to solve the problem of ecological environmental pollution caused by waste stockpiling. The present invention adopts the following technologies Program realization

Method used

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  • Comprehensive utilization and activation method of waste charcoal powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Such as figure 1 Shown, the comprehensive utilization and activation method of this waste charcoal powder, its concrete steps are as follows:

[0017] (1) Firstly, the solid carbon-containing products obtained by gasifying the waste charcoal powder, walnut shells and pine nut shells through the gasification furnace are dried at 80°C for 30 hours until the water content is below 5wt%, and then the gasification products are crushed to The particle size is 0.1mm, and the mixed material is obtained by mixing evenly according to the mass ratio of 60:20:20;

[0018] (2) Immerse the mixed material obtained in step (1) in phosphoric acid solution for 10 hours, and dry the impregnated raw material at 80°C for 20 hours until the water content is below 10wt%; the concentration of phosphoric acid in the phosphoric acid solution is 0.5mol / L , the solid-to-liquid ratio of the mixed material and the phosphoric acid solution is 0.03:1g / ml;

[0019] (3) Put the material treated in ste...

Embodiment 2

[0021] Such as figure 1 Shown, the comprehensive utilization and activation method of this waste charcoal powder, its concrete steps are as follows:

[0022] (1) Firstly, the solid carbon-containing products obtained by gasifying the waste charcoal powder, walnut shells and pine nut shells through the gasification furnace are dried at 120°C for 10 hours until the water content is below 5wt%, and then the gasification products are crushed to the particle size Average 20mm, according to the mass ratio of 30:50:20 mixed evenly to obtain the mixed material;

[0023] (2) Immerse the mixed material obtained in step (1) in zinc chloride solution for 30 hours, and dry the impregnated raw material at 120°C for 10 hours until the water content is below 10wt%; the concentration of phosphoric acid in the phosphoric acid solution is 2mol / L, the solid-to-liquid ratio of the mixed material and the zinc chloride solution is 1.00:1g / ml;

[0024] (3) The material treated in step (2) is activ...

Embodiment 3

[0026] Such as figure 1 Shown, the comprehensive utilization and activation method of this waste charcoal powder, its concrete steps are as follows:

[0027] (1) Firstly, the solid carbon-containing products obtained by gasifying the waste charcoal powder, walnut shells and pine nut shells through the gasification furnace are dried at 100°C for 20 hours until the water content is below 5wt%, and then the gasification products are crushed to the particle size Average 10mm, according to the mass ratio of 30:20:50 mixed evenly to obtain the mixed material;

[0028] (2) Immerse the mixed material obtained in step (1) in zinc chloride solution for 20 hours, and dry the impregnated raw material at 100°C for 15 hours until the water content is below 10wt%; the concentration of phosphoric acid in the phosphoric acid solution is 1mol / L, the solid-to-liquid ratio of mixed material and zinc chloride solution is 0.50:1g / ml;

[0029] (3) The material treated in step (2) is activated by ...

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Abstract

The invention relates to a comprehensive utilization and activation method of waste charcoal powder, and belongs to the technical field of secondary resource comprehensive utilization. The comprehensive utilization and activation method comprises following steps: solid carbon-containing products obtained via respective gas making of waste charcoal powder, walnut shell, and pine nut shell using a gasification furnace are dried until water content is lower than 5wt%, and then obtained gasification products are smashed and uniformly mixed so as to obtain a mixture; the mixture is subjected to dipping in a phosphoric acid or zinc chloride solution, and an obtained raw material is dried at 80 to 120 DEG C for 10 to 20h until water content is lower than 10wt%; the raw material is exposed to water vapor at 500 to 800 DEG C for 1.0 to 4.0h of activation, after activation, an activation product is washed with distilled water until pH value of a washing solution is 7, and is dried at 80 to 120 DEG C for 10 to 20h until water content is lower than 5wt% so as to obtain active carbon; the obtained active carbon is subjected to grinding and sieving so as to obtain active carbon with different particle sizes based on practical requirements. The comprehensive utilization and activation method is used for realizing high added value comprehensive utilization of a mixed gasification product of a large amount of charcoal powder, walnut shell, and pine nut shell generated in industrial silicon production processes.

Description

technical field [0001] The invention relates to a method for comprehensive utilization and activation of waste charcoal powder, belonging to the technical field of comprehensive utilization of secondary resources. Background technique [0002] The main raw materials for industrial silicon production are silica and carbonaceous reducing agents. Charcoal has always been the main raw material for industrial silicon production due to its high reactivity and high specific resistance under high temperature conditions, so charcoal will produce a large amount of powder during transportation and stacking. For many companies, charcoal powder is in bulk. Putting it into the submerged arc furnace to participate in industrial silicon smelting not only wastes raw materials, but also reduces the gas permeability of the material layer in the submerged arc furnace and brings a series of problems in the industrial silicon smelting process. According to incomplete statistics, Yunnan Silicon I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/10C01B32/336
Inventor 马文会陈正杰魏奎先伍继君李绍元雷云谢克强杨斌戴永年
Owner KUNMING UNIV OF SCI & TECH
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