Alumina composite additive for improving ash fusion point of civil coke and preparation method and application thereof

A composite additive and alumina technology, which is applied in the direction of fuel additives, petroleum industry, solid fuel, etc., can solve the problems of additives that have not been reported, and achieve the effect of improving operability and applicability, wide source of raw materials, and remarkable effect

Active Publication Date: 2017-08-29
TAIYUAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] After searching, there is no report on additives for improving the melting point of civil coke ash

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Coarsely crush and finely crush the dried kaolin, quartz sand, alumina and hematite additive raw materials to a particle size of ≤3mm;

[0028] (2) Weigh 60kg of crushed kaolin, 20kg of quartz sand, 10kg of alumina, and 10kg of hematite in turn, and mix them together and stir evenly;

[0029] (3) The uniformly stirred mixture is dry-ground to make the particle size of the raw material ≤ 150 mesh (0.1mm); then calcined at 260°C for 2 hours and cooled to room temperature, which is the alumina composite additive;

[0030] (4) Furnace coal is blended with 20wt% long-flame coal, 15wt% lean coal, 30wt% 1 / 3 coking coal, 20wt% fat coal and 15wt% gas coal; the quality index of the blended coal For: V daf 30.0%, A d 13.5%, FC d 60.6%, S t,d 0.67%; cohesion index G=65, fineness (≤3mm)=73.6%;

[0031] ⑸According to the weight ratio of alumina composite additive: blended coal is 0.4:100, add the prepared alumina composite additive to the blended coal, heat to 1100°C in the...

Embodiment 2

[0037] (1) Coarsely crush and finely crush the dried kaolin, quartz sand, alumina and hematite and other additive raw materials to particle size ≤ 3mm;

[0038] (2) Weigh 40kg of crushed kaolin, 20kg of quartz sand, 20kg of alumina, and 15kg of hematite in turn, and mix them together and stir evenly;

[0039] (3) The uniformly stirred mixture is dry-milled to make the particle size of the raw material ≤ 150 mesh (0.1mm); then calcined at 270°C for 1.8 hours, cooled to room temperature and packaged, which is the kaolin composite additive;

[0040] (4) Furnace coal is blended with 20wt% weakly caking coal, 40wt% non-caking coal, 20wt% gas fat coal and 20wt% lean coal; its quality index (wt%): V daf 33.0%, A d 13.5%, FC d 58.2%, S t,d 0.84%, cohesion index G=50, fineness (≤3mm)=86.5%;

[0041] ⑸Alumina composite additive: the weight ratio of mixed coal is 0.6:100, the prepared kaolin composite additive is added to the mixed coal, heated to 1050°C in the dry distillation furn...

Embodiment 3

[0047] (1) Coarsely crush and finely crush the dried kaolin, quartz sand, alumina and hematite and other additive raw materials to particle size ≤ 3mm;

[0048] (2) Weigh 45kg of crushed kaolin, 25kg of quartz sand, 15kg of alumina, and 10kg of hematite in turn, and mix them together and stir evenly;

[0049] (3) The uniformly stirred mixture is dry-ground to make the raw material particle size ≤ 150 mesh (0.1mm); then calcined at 270°C for 1.8 hours, cooled to room temperature and packaged, which is the alumina composite additive;

[0050] ⑷The coal into the furnace is blended with 20wt% weakly caking coal, 15wt% lean coal, 30wt% 1 / 3 coking coal, 20wt% fat coal and 15wt% main coking coal; the quality index of the blended coal For: V daf 30.0%, A d 13.5%, FC d 60.6%, S t,d 0.67%; cohesion index G=74, fineness (≤3mm)=73.6%;

[0051] ⑸According to the weight ratio of alumina composite additive: blended coal is 0.8:100, add the prepared kaolin composite additive to the blend...

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Abstract

The invention discloses an alumina composite additive for improving ash fusion point of civil coke, the alumina composite additive comprises 40-60 parts by weight of kaolin, 20-30 parts by weight of quartz sand, 10-20 parts by weight of alumina and 10-20 parts by weight of hematite. The raw materials of the alumina composite additive are wide and rich in sources, and low in price, can obviously improve the ash fusion point of the civil coke. Compared with direct combustion of raw coal, in the premise of no changing of existing stoves, e the operability and applicability of civilian fuels can be significantly improved, the work efficiency of manual operation and boilers can be improved, and the use property of the civil coke is greatly improved.

Description

technical field [0001] The invention relates to an alumina composite additive for improving the melting point of civil coke ash, a preparation method and an application. Background technique [0002] Coal is the main energy source in our country, and its main utilization method is combustion. The direct combustion of a large amount of coal leads to many problems such as climate change, carbon cycle, environmental pollution and health hazards. Compared with industrial and power generation coal, although the consumption of domestic scattered coal is relatively low, due to the lack of effective flue gas dust removal, desulfurization and other devices, the flue gas is discharged directly, and it has become one of the main sources of air pollution in my country. Therefore, it is the key to improve the atmospheric environment to replace civilian scattered raw coal with clean and environmentally friendly fuels. [0003] Civil coke is mainly fuel coal (power coal), supplemented by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/10C10L10/00
CPCC10L9/10C10L10/00C10L2200/029
Inventor 刘守军杜文广杨颂闫旭东闫志中史鹏政
Owner TAIYUAN UNIV OF TECH
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