Hematite composite additive for reducing civil coke ignition temperature, preparing method and application

Abstract

The invention provides a hematite composite additive for reducing civil coke ignition temperature, a preparing method and application. The hematite composite additive is prepared from, by weight, 40-60 parts of hematite, 10-15 parts of lime-stone, 10-20 parts of quick lime and 20-40 parts of sodium carbonate. The raw materials are wide in source and rich, price is low, the ignition temperature reducing effect is remarkable, sulfur oxide and nitric oxide emission is reduced by over 70%, smoke dust emission is reduced by over 96%, and the hematite composite additive has great significance in coal consumption for village life of peri-urban areas, village and city environment quality improvement and haze weather reduction.

Description

technical field

[0001] The invention relates to a hematite 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 ...

Examples

Embodiment 1

[0024] (1) Coarsely crush and finely crush the dried hematite, limestone, quicklime and soda ash additive raw materials to a particle size of ≤3mm;

[0025] (2) Weigh 60kg of crushed hematite, 10kg of limestone, 10kg of quicklime, and 20kg of soda ash in turn, and mix them together and stir evenly;

[0026] (3) The uniformly stirred mixture is dry-ground to make the raw material particle size ≤ 150 mesh (0.1mm); then calcined at 260°C for 2 hours, and cooled to room temperature, which is the hematite 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 hematite composite additive: the weight ratio of mixed coal is 0.2:100, add the prepared hematite composite additive to the mixed coal, heat to 1100 ° ...

Embodiment 2

[0034] (1) Coarsely crush and finely crush the dried hematite, limestone, quicklime, soda ash and other additive raw materials to a particle size of ≤3mm;

[0035] (2) Weigh 55kg of crushed hematite, 12kg of limestone, 13kg of quicklime, and 25kg of soda ash in turn, and mix them together and stir evenly;

[0036] (3) The uniformly stirred mixture is dry-milled 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 hematite 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 hematite composite additive: the weight ratio of mixed coal is 0.4:100, add the prepared hematite composite additive to the mixed coal, heat to 1050°C in the...

Embodiment 3

[0044] (1) Coarsely crush and finely crush the dried hematite, limestone, quicklime, soda ash and other additive raw materials to a particle size of ≤3mm;

[0045] (2) Weigh 50kg of crushed hematite, 13kg of limestone, 15kg of quicklime, and 30kg of soda ash in turn, and mix them together and stir evenly;

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

[0048] ⑸According to the hematite composite additive: the weight ratio of mixed coal is 0.6:100, add the prepared hematite composite additive to the mixed coa...

technical field

[0001] The invention relates to a hematite 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 ...

Examples

Embodiment 1

[0024] (1) Coarsely crush and finely crush the dried hematite, limestone, quicklime and soda ash additive raw materials to a particle size of ≤3mm;

[0025] (2) Weigh 60kg of crushed hematite, 10kg of limestone, 10kg of quicklime, and 20kg of soda ash in turn, and mix them together and stir evenly;

[0026] (3) The uniformly stirred mixture is dry-ground to make the raw material particle size ≤ 150 mesh (0.1mm); then calcined at 260°C for 2 hours, and cooled to room temperature, which is the hematite 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 hematite composite additive: the weight ratio of mixed coal is 0.2:100, add the prepared hematite composite additive to the mixed coal, heat to 1100 ° ...

Embodiment 2

[0034] (1) Coarsely crush and finely crush the dried hematite, limestone, quicklime, soda ash and other additive raw materials to a particle size of ≤3mm;

[0035] (2) Weigh 55kg of crushed hematite, 12kg of limestone, 13kg of quicklime, and 25kg of soda ash in turn, and mix them together and stir evenly;

[0036] (3) The uniformly stirred mixture is dry-milled 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 hematite 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 hematite composite additive: the weight ratio of mixed coal is 0.4:100, add the prepared hematite composite additive to the mixed coal, heat to 1050°C in the...

Embodiment 3

[0044] (1) Coarsely crush and finely crush the dried hematite, limestone, quicklime, soda ash and other additive raw materials to a particle size of ≤3mm;

[0045] (2) Weigh 50kg of crushed hematite, 13kg of limestone, 15kg of quicklime, and 30kg of soda ash in turn, and mix them together and stir evenly;

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

[0048] ⑸According to the hematite composite additive: the weight ratio of mixed coal is 0.6:100, add the prepared hematite composite additive to the mixed coa...