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Sulfur fixation slag composite pressed active carbon and preparation method thereof

A composite molding and sulfur-fixing slag technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as cumbersome and wasteful energy preparation process, and achieve the effect of solving low strength

Inactive Publication Date: 2012-10-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in order to obtain high specific surface area and strength, the preparation process of many shaped activated carbons needs heating and firing, which not only wastes energy but also makes the preparation process cumbersome.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The market purchases ordinary powdered activated carbon with a specific surface area of ​​800㎡ / g. The main oxide composition (unit: wt%) of sulfur-fixing slag is shown in Table 1:

[0026] Table 1

[0027] SiO 2 al 2 o 3 CaO SO 3 19.80 20 42.30 6

[0028] A preparation method for sulfur-fixing slag composite molding activated carbon, it comprises the following steps:

[0029] 1) Put the sulfur-fixed slag into the grinder and grind for half an hour, pass through a 200-mesh sieve for screening, and control the remaining 8% of the sieve;

[0030] 2) According to the mass ratio of powdered activated carbon: sulfur-fixed slag is 3:2, select powdered activated carbon and the above-mentioned sulfur-fixed slag;

[0031] 3) Mix the sulfur-fixing slag and powdered activated carbon, then add 60% water of the total mass of the sulfur-fixing slag and powdered activated carbon, and stir;

[0032] 4) After stirring for 30 minutes, fill the mixed sam...

Embodiment 2

[0035] The market purchases ordinary powdered activated carbon with a specific surface area of ​​800㎡ / g. The main oxide composition (unit: wt%) of sulfur-fixing slag is shown in Table 2:

[0036] Table 2

[0037] SiO 2 Al 2 o 3 CaO SO 3 15.00 15.50 49 9

[0038] A preparation method for sulfur-fixing slag composite molding activated carbon, it comprises the following steps:

[0039] 1) Put the sulfur-fixed slag into the grinder and grind for half an hour, pass through a 200-mesh sieve for screening, and control the remaining 8% of the sieve;

[0040] 2) According to the mass ratio of powdered activated carbon: sulfur-fixed residue is 1:1, select powdered activated carbon and the above-mentioned sulfur-fixed residue;

[0041] 3) Mix the sulfur-fixing slag and powdered activated carbon, then add 60% water of the total mass of the sulfur-fixing slag and powdered activated carbon, and stir;

[0042] 4) After stirring for 20 minutes, fill the mix...

Embodiment 3

[0045] The market purchases ordinary powdered activated carbon with a specific surface area of ​​800㎡ / g. The main oxide composition (unit: wt%) of sulfur-fixing slag is shown in Table 3:

[0046] SiO 2 Al 2 o 3 CaO SO 3 17.90 17.2 46.40 7.5

[0047] A preparation method for sulfur-fixing slag composite molding activated carbon, it comprises the following steps:

[0048] 1) Put the sulfur-fixed slag into the grinder and grind for half an hour, pass through a 200-mesh sieve for screening, and control the remaining 8% of the sieve;

[0049] 2) According to the mass ratio of powdered activated carbon: sulfur-fixed slag is 1:4, select powdered activated carbon and the above-mentioned sulfur-fixed slag;

[0050] 3) Mix the sulfur-fixing slag and powdered activated carbon, then add 60% water of the total mass of the sulfur-fixing slag and powdered activated carbon, and stir;

[0051] 4) After stirring for 20 minutes, fill the mixed sample into the m...

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Abstract

The invention provides a sulfur fixation slag composite pressed active carbon and a preparation method thereof. The preparation method of the sulfur fixation slag composite pressed active carbon comprises the following steps: 1) selecting powder activated carbon and sulfur fixation slag in a mass ratio of 1:4-3:2; 2) mixing the powder activated carbon and the sulfur fixation slag, adding water which accounts for 60% of the total mass of the powder activated carbon and sulfur fixation slag, and stirring; and 3) adding the stirred sample into a mold, pressing and maintaining the pressure, stripping, and curing to obtain the sulfur fixation slag composite pressed active carbon. By using the common powder activated carbon as the raw material and the sulfur fixation slag obtained in a coal desulfurization process as a composite binder, a firing-free method is utilized to prepare the sulfur fixation slag composite pressed active carbon. The invention recycles the sulfur fixation slag, changes wastes into valuable substances, and solves the problems of low activated carbon strength, short service life, difficulty in recycling and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of activated carbon, in particular to a composite molded activated carbon of sulfur-fixing slag and a preparation method thereof. Background technique [0002] Compared with powdered activated carbon, shaped activated carbon has a compact structure, a specific shape, higher bulk density and strength. Its density is high, and its surface area per unit volume is much higher than that of powdered activated carbon, so it has more advantages in the process of storage and transportation; its shape is easy to adjust, its strength is high, it has no dust pollution, and it is easy to replace and regenerate, and it is easier to meet various uses in different industries. [0003] In terms of daily life, shaped activated carbon has become the main material of filter elements in water purifiers, and products such as activated carbon cups and spoons have also appeared, which use activated carbon's good adso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30
Inventor 谢峻林饶成成何峰兰雪勇李豫梅
Owner WUHAN UNIV OF TECH
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