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Magnetite composite additive for reducing ignition temperature of civilian coke, preparation method and application

A technology of composite additives and ignition temperature, applied in fuel additives, coke ovens, solid fuels, etc., can solve the problems of inability to use coal-fired combustion aids, reduce the ignition temperature of civil coke, etc., and achieve improved environmental quality, significant effect, and low price Effect

Active Publication Date: 2016-07-06
TAIYUAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because civil coke needs to go through a special process of high-temperature dry distillation, most of the components in the coal-fired combustion aid will be invalidated due to pyrolysis; therefore, civil coke cannot use the coal-fired combustion aid of the prior art
After searching, there is no report on additives that reduce the ignition temperature of civil coke

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Coarsely crush and finely crush the dried magnetite, limestone, manganese dioxide, zinc oxide and other additive raw materials to a particle size of ≤3mm;

[0025] (2) Weigh 60kg of crushed magnetite, 20kg of limestone, 2kg of manganese dioxide, and 1kg of zinc oxide in turn, and mix them together and stir evenly;

[0026] (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 magnetite composite additive;

[0027] (4) Furnace coal is mixed with 20wt% long-flame 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 adf 30.0%, A d 13.5%, FC d 60.6%, S t,d 0.67%; cohesion index G=74, fineness (≤3mm)=73.6%;

[0028] ⑸According to the weight ratio of magnetite composite additive: mixed coal is 0.2:100, add the prepared magnetite composite additive t...

Embodiment 2

[0034] (1) Coarsely crush and finely crush the dried magnetite, limestone, manganese dioxide, zinc oxide and other additive raw materials to a particle size of ≤3mm;

[0035] (2) Weigh 55kg of crushed magnetite, 23kg of limestone, 2.3kg of manganese dioxide, and 1.3kg of zinc oxide in turn, and mix them together and stir evenly;

[0036] (3) The uniformly stirred mixture is dry-ground 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 magnetite composite additive;

[0037] (4) Furnace coal is blended with 30wt% weak caking coal, 40wt% long-flame coal, 20wt% gas fertilizer coal and 10wt% non-caking coal; its quality index (wt%): V adf 35.0%, A d 13.5%, FC d 56.2%, S t,d 0.84%, cohesion index G=40, fineness (≤3mm)=86.5%;

[0038] ⑸According to the weight ratio of magnetite composite additive: mixed coal is 0.4:100, add the prepared magnetite composite additive to the mixe...

Embodiment 3

[0044] (1) Coarsely crush and finely crush the dried magnetite, limestone, manganese dioxide, zinc oxide and other additive raw materials to a particle size of ≤3mm;

[0045] (2) Weigh 50kg of crushed magnetite, 25kg of limestone, 2.5kg of manganese dioxide, and 1.5kg of zinc oxide in turn, and mix them together and stir evenly;

[0046] (3) The uniformly stirred mixture is dry-ground to make the particle size of the raw material ≤ 150 mesh (0.1mm); then calcined at 280°C for 1.5 hours, cooled to room temperature and packaged, which is the magnetite composite additive;

[0047] (4) Furnace coal is mixed with 20wt% long-flame 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 adf 30.0%, A d 13.5%, FC d 60.6%, S t,d 0.67%; cohesion index G=74, fineness (≤3mm)=73.6%; (5) according to the weight ratio of magnetite composite additive: mixed coal is 0.6:100, the prepared magnetite composite additi...

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Abstract

The invention provides a magnetite composite additive for reducing the ignition temperature of civilian coke. The composite additive is prepared from, by weight, 40-60 parts of magnetite, 20-30 parts of limestone, 2-3 parts of manganese dioxide and 1-2 parts of zinc oxide. The source of the raw materials is wide and rich, the price is low, the cooling effect on the ignition temperature is remarkable, emissions of sulfur oxide and nitrogen oxide are reduced by 70% or above, emissions of smoke are reduced by 96% or above, and great practical significance is achieved for solving the life coal problem in rural areas around cities, improving rural and urban environment quality and reducing haze weather.

Description

technical field [0001] The invention relates to a magnetite composite additive for reducing the ignition temperature of civil coke, a preparation method and an application. Background technique [0002] Coal combustion is the main way for my country to obtain energy at present and for a long time in the future. A large amount of dust, sulfur dioxide, and nitrogen oxides emitted by direct combustion of coal have caused serious harm to the ecological environment, especially the atmospheric environment, leading to air pollution in our country. Severe, hazy weather occurs frequently. Based on the current situation of coal-burning pollution, the state has issued a series of laws and regulations, and adopted strong punishment measures. Although the implementation of these regulations has played a certain role in curbing the aggravation of coal-burning pollution, it is still far from the goal of environmental protection. [0003] In fact, the environmental pollution caused by coal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/04C10L9/10C10L10/02C10B57/06
CPCC10B57/06C10L5/04C10L9/10C10L10/02C10L2230/04C10L2230/22
Inventor 杜文广刘守军张智聪杨颂上官炬
Owner TAIYUAN UNIV OF TECH
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