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A method for preparing activated carbon from dedusting ash emitted by iron and steel enterprises

A technology for preparing activated carbon and enterprises, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve problems such as large environmental impact, achieve the effects of protecting the environment, low production costs, and preventing secondary pollution

Active Publication Date: 2021-11-19
MAANSHAN SHUNDA ENVIRONMENTAL PROTECTION EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The air pollutants emitted by industrial enterprises are treated by bag filter and other dust removal equipment. Most of the particulate waste gas is collected and the fly ash is related to the collected particulate gas. Among them, iron and steel enterprises will produce a large amount of dust removal dust, environmental dust removal dust It is gathered at room temperature, the properties of the medium dust have no major changes, basically no harm to production, but it has a great impact on the environment, and its negative impact is attracting increasing attention. If no measures are taken, it will cause dust hazards

Method used

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  • A method for preparing activated carbon from dedusting ash emitted by iron and steel enterprises

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of method utilizing the dedusting ash of iron and steel enterprise discharge to prepare active carbon, comprises the following steps:

[0025] (1) adding water to the dedusting ash to make a slurry, adding the slurry to the first-stage flotation machine and adding a hydrocarbon-based surfactant to carry out the first-stage flotation to obtain carbon powder with a higher carbon content;

[0026] (2) Add water to the carbon powder with higher carbon content to make slurry and add it to the secondary flotation machine, then add hydrocarbon-based surfactant to carry out secondary flotation to obtain carbon powder with high carbon content, which is dried, The drying temperature is 95°C;

[0027] (3) Mix the dried carbon powder with petroleum coke, grind it into powder, pass through a 400-mesh sieve, add water to the reactor, heat to 85°C and stir for 5 hours, filter, dry the solid at 115°C, and then add it to the reactor , the total mass of carbon powder and petroleu...

Embodiment 2

[0030] A kind of method utilizing the dedusting ash of iron and steel enterprise discharge to prepare active carbon, comprises the following steps:

[0031] (1) adding water to the dedusting ash to make a slurry, adding the slurry to the first-stage flotation machine and adding a hydrocarbon-based surfactant to carry out the first-stage flotation to obtain carbon powder with a higher carbon content;

[0032] (2) Add water to the carbon powder with higher carbon content to make slurry and add it to the secondary flotation machine, then add hydrocarbon-based surfactant to carry out secondary flotation to obtain carbon powder with high carbon content, which is dried, The drying temperature is 98°C;

[0033] (3) Mix the dried carbon powder with petroleum coke, grind it into powder, pass through a 400-mesh sieve, add water to the reactor, heat to 82°C and stir for 4.5 hours, filter, dry the solid at 112°C, and then add it to the reactor Among them, the total mass of carbon powder ...

Embodiment 3

[0036] A kind of method utilizing the dedusting ash of iron and steel enterprise discharge to prepare active carbon, comprises the following steps:

[0037] (1) adding water to the dedusting ash to make a slurry, adding the slurry to the first-stage flotation machine and adding a hydrocarbon-based surfactant to carry out the first-stage flotation to obtain carbon powder with a higher carbon content;

[0038] (2) Add water to the carbon powder with higher carbon content to make slurry and add it to the secondary flotation machine, then add hydrocarbon-based surfactant to carry out secondary flotation to obtain carbon powder with high carbon content, which is dried, The drying temperature is 90°C;

[0039] (3) Mix the dried carbon powder with petroleum coke, grind it into powder, pass through a 400-mesh sieve, add water to the reactor, heat to 80°C and stir for 4 hours, filter, dry the solid at 110°C, and then add it to the reactor , the total mass of carbon powder and petroleu...

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Abstract

The invention provides a method for preparing activated carbon from dedusting ash discharged by iron and steel enterprises, which relates to the field of environmental protection technology and comprises the following steps: adding water to the dedusting ash to make slurry, and performing primary flotation to obtain carbon powder with relatively high carbon content; The carbon powder with high carbon content is slurried with water and subjected to secondary flotation to obtain carbon powder with high carbon content; the dried carbon powder is mixed with petroleum coke, ground into powder and sieved, then added to the reaction kettle and heated to Stir at 80-90°C for 4-6 hours, filter, dry the solid and add it to the reaction kettle; add the obtained solution dropwise to the above reaction kettle, after the dropwise addition, filter, and exhaust the air in the furnace with nitrogen , heat up, and after calcining, water vapor can be introduced to obtain activated carbon. The invention can prevent secondary pollution of dust, protect the environment, and make full use of resources. The activated carbon produced is of good quality and has good economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for preparing activated carbon from dedusting ash discharged from iron and steel enterprises. Background technique [0002] The air pollutants emitted by industrial enterprises are treated by bag filter and other dust removal equipment. Most of the particulate waste gas is collected and the fly ash is related to the collected particulate gas. Among them, iron and steel enterprises will produce a large amount of dust removal dust, environmental dust removal dust It is gathered at room temperature, the properties of the medium dust have no major changes, and it is basically harmless to production, but it has a great impact on the environment. Its negative impact is attracting increasing attention. If no measures are taken, it will cause dust hazards. [0003] Rational development and utilization of dedusting ash can not only prevent secondary pollution, pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/324C01B32/336
CPCC01P2006/12C01P2006/14C01B32/324C01B32/336
Inventor 王春保
Owner MAANSHAN SHUNDA ENVIRONMENTAL PROTECTION EQUIP
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