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Process for producing pressed active carbon

A technology of forming activated carbon and technical performance, which is applied in the field of preparation of forming activated carbon, can solve the problem of high manufacturing cost, and achieve the effect of reducing manufacturing cost and improving comprehensive utilization level.

Inactive Publication Date: 2009-04-08
李贵义
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as Chinese patent 02160182.8, its disadvantage is high manufacturing cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of shaped activated carbon, it comprises the following steps:

[0028] a. Break the raw coal into coal pieces smaller than 10mm;

[0029] b. Remove gangue from raw coal;

[0030] c. Drying and dehydration to make the moisture content of raw coal reach 4-5%;

[0031] d. Choose a kind of weak caking coal with developed micropores and submicropores 37%, a kind of non-caking coal with developed fine and mesopores 41%, and a kind of coal with developed micropores and mesopores but The fat coal with poor mechanical strength is 22%, and the passing rate of powder less than 200 mesh is greater than 85% through pulverization;

[0032] e. The powder is pressed and formed on the granulator, and the strength is greater than 87%;

[0033] f. Formed charcoal carbonization; g. Formed carbonized material activation.

[0034] Properties of shaped activated carbon

[0035] Ash % less than 6.1

[0036] Strength% greater than 97

[0037] Iodine value mg / g greate...

Embodiment 2

[0046] A preparation method of shaped activated carbon, it comprises the following steps:

[0047] a. Break the raw coal into coal pieces smaller than 10mm;

[0048] b. Remove gangue from raw coal;

[0049] c. Drying and dehydration to make the moisture content of raw coal reach 4-5%;

[0050] d. Choose a kind of weak caking coal 64% that can produce fine pores and submicropores, a kind of non-caking coal that can produce fine and medium pores 25%, and a kind of coal that can produce micropores and mesopores. 11% of fat coal with poor mechanical strength, through pulverization, the passing rate of powder less than 200 mesh is greater than 85%;

[0051] e. The powder is pressed and formed on the granulator, and the strength is greater than 87%;

[0052] f. Formed charcoal carbonization; g. Formed carbonized material activation.

[0053] Properties of shaped activated carbon

[0054] Ash % less than 6.0

[0055] Strength% greater than 97

[0056] Iodine value mg / g greater...

Embodiment 3

[0065] A preparation method of shaped activated carbon, it comprises the following steps:

[0066] a. Break the raw coal into coal pieces smaller than 10 mm;

[0067] b. Remove gangue from raw coal;

[0068] c. Drying and dehydration to make the moisture content of raw coal reach 4-5%;

[0069] d. Select 50% of a kind of weakly caking coal with well-developed micropores and submicropores, 33% of non-caking coal with well-developed fine and mesopores, and a kind of non-caking coal with well-developed micropores and mesopores. The fat coal with poor mechanical strength is 17%, and the passing rate of powder less than 200 mesh is greater than 85% through pulverization;

[0070] e. The powder is pressed and formed on the granulator, and the strength is greater than 87%;

[0071] f. Carbonization of formed carbon; g. Activation of formed carbonized material;

[0072] The performance of the prepared activated carbon:

[0073] Ash %, less than 6.23,

[0074] Intensity%, greater...

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Abstract

The invention relates to a method for preparing a molded active carbon. The method comprises the following steps: a. crude coal is broken up to coal blocks of less than 10 millimeters; b. attal is removed from the crude coal; c. the crude coal is dried and dehydrated in order that the water content of the crude coal reaches between 4 and 5 percent; d. 37 to 64 percent of weak caking coal which can be used for producing developed fine micropores and secondary micropores, 25 to 41 percent of non-caking coal which can be used for manufacturing developed fine middle pores and 11 to 22 percent of rich coal which can be used for producing developed micropores and middle pores with poor mechanical strength are selected; and a powdery material with less than 200 meshes has the passing rate of more than 85 percent through pulverization; e. the powdery material is pressed and molded through a pelletizer; and the strength of the powdery material is more than 87 percent; f. molded carbon is carbonized; and g. the molded and carbonized material is activated. Before molding, the method does not select tar or other additives and only selects the weak caking coal, the non-caking coal and the rich coal which are easy to obtain locally, thereby greatly reducing production cost and improving the comprehensive utilization rate of coal of the state.

Description

technical field [0001] The invention belongs to a method for directly using coal to prepare activated carbon, in particular to a method for preparing shaped activated carbon. Background technique [0002] Activated carbon is a very important industrial product with a wide range of uses. At present, the production methods of activated carbon mainly include physical activation method and chemical activation method. The chemical activation method pollutes the environment seriously, so it is rarely used now. The physical activation method is to carbonize carbon-containing materials under normal pressure conditions, then use water vapor as an activator, and activate chemical reactions between water vapor and carbon under normal pressure conditions of 700-1000 ° C to produce activated carbon. Before molding and granulating, coal powder, tar and water are mostly selected and added to the mixer to stir evenly to make coal paste, and then go to shape. Such as Chinese patent 021601...

Claims

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Application Information

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IPC IPC(8): C01B31/08
Inventor 常玉清康跃福李贵义宋国强张达贺守印李磊李慧刘艮石慧赵义春
Owner 李贵义
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