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Dechlorinating agent suitable for blast furnace gas, preparation method of dechlorinating agent and application of composition of dechlorinating agent

A blast furnace gas and dechlorination agent technology, which is applied in the removal of gas pollutants, combustible gas purification, combustible gas purification/transformation, etc., can solve the problems of high cost, dechlorination effect needs to be strengthened, and large amount of addition.

Pending Publication Date: 2021-09-10
ZHONGJING ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of zinc oxide in the desulfurizer is relatively large, the cost is high, and the dechlorination effect needs to be strengthened

Method used

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  • Dechlorinating agent suitable for blast furnace gas, preparation method of dechlorinating agent and application of composition of dechlorinating agent
  • Dechlorinating agent suitable for blast furnace gas, preparation method of dechlorinating agent and application of composition of dechlorinating agent
  • Dechlorinating agent suitable for blast furnace gas, preparation method of dechlorinating agent and application of composition of dechlorinating agent

Examples

Experimental program
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preparation example Construction

[0037]

[0038] The preparation method of the dechlorination agent applicable to blast furnace gas of the present invention comprises the steps:

[0039] (1) kneading calcium hydroxide, sodium carbonate, zinc oxide, red mud, carbide slag and carrier to obtain the first mixture; (2) uniformly mixing the first mixture, binder and water to form the second mixture; The second mixture is molded to obtain a green body; (3) drying and then roasting the green body to obtain a dechlorination agent. The selection and dosage of raw materials are as described above, and will not be repeated here.

[0040] In the present invention, the kneading time may be 5-30 min; preferably 10-25 min; more preferably 12-20 min. This will aid in the thorough mixing of the ingredients.

[0041] In the present invention, extrusion molding can be used for molding. The resulting body can be a cylinder.

[0042] In the present invention, the drying temperature may be 80-120°C; preferably 90-110°C; more pr...

Embodiment approach

[0048] According to one embodiment of the present invention, it specifically includes the following steps:

[0049] (1) kneading calcium hydroxide, sodium carbonate, zinc oxide, red mud, carbide slag and carrier to obtain the first mixture;

[0050] (2) uniformly mixing the first mixture, binder and water to form a second mixture; molding the second mixture to obtain a green body;

[0051] (3) Drying the green body and then roasting to obtain the dechlorination agent.

[0052] The composition and parameters of the raw materials are as described above and will not be repeated here.

Embodiment 1 and comparative example 1～3

[0054] Kaolin, aluminate cement, calcium hydroxide, sodium carbonate, zinc oxide, red mud (D 50 40μm) and / or carbide slag (D 50 40 μm) were mixed and kneaded for 15 minutes to obtain the first mixture.

[0055] Moisten the first mixture, carboxymethyl cellulose, safflower powder and polyvinyl alcohol with water, mix well, roll and knead into a paste (the second mixture); extrude the paste to obtain a cylindrical green body (diameter is 3mm).

[0056] The green body was dried at 105°C for 2 hours, and then fired at 350°C for 1.5 hours to obtain a dechlorination agent.

[0057] The amount of each raw material is shown in Table 1.

[0058] Table 1

[0059] Example 1 Comparative example 1 Comparative example 2 Comparative example 3 Kaolin (parts by weight) 17 17 17 20 Aluminate cement (parts by weight) 10 10 10 12 Calcium hydroxide (parts by weight) 45 45 45 50 Sodium carbonate (parts by weight) 10 10 10 10 Zinc oxide ...

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Abstract

The invention discloses a dechlorinating agent suitable for blast furnace gas and a preparation method of the dechlorinating agent. The dechlorinating agent is prepared from the following raw materials in parts by weight: 20-55 parts of calcium hydroxide; 2-20 parts by weight of sodium carbonate; 2-10 parts by weight of zinc oxide; 1-9 parts by weight of red mud; 1-9 parts by weight of carbide slag; 20-40 parts by weight of a carrier; and 1-10 parts by weight of a binder. The dechlorinating agent has relatively high chlorine capacity. The invention also discloses application of a composition in improving the chlorine capacity of the dechlorinating agent suitable for blast furnace gas.

Description

technical field [0001] The invention relates to a dechlorinating agent suitable for blast furnace gas and a preparation method thereof, and also relates to an application of the composition. Background technique [0002] Chlorine brought in by iron ore, coke and coal powder during the blast furnace smelting process enters into the top gas of the blast furnace in the form of HCl gas after a series of chemical reactions during the smelting process, which easily leads to TRT (blast furnace gas residual pressure turbine power generation device) blade corrosion and salt accumulation and gas pipeline system corrosion and other hazards. Blast furnace gas has the characteristics of fast flow rate, large flow rate, high pressure, and relatively high content of carbon dioxide, water vapor and furnace dust. Currently, there is a lack of cheap and high-quality dechlorination agents for blast furnace gas. [0003] Red mud and calcium carbide slag are industrial solid waste produced by d...

Claims

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Application Information

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IPC IPC(8): C10K1/20
CPCC10K1/20C10K1/003
Inventor 王键张敏孙曼丽
Owner ZHONGJING ENVIRONMENTAL TECH CO LTD
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