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Nickel-based composite additive for reducing nitrogen content of civilian coke as well as preparation method and application

A composite additive and nitrogen content technology, applied in coke ovens, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as methods and additives for reducing nitrogen content in coal-fired products and civil cokes that have not been reported yet. , to achieve the effect of reducing nitrogen content

Active Publication Date: 2017-09-01
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, the methods and additives for reducing the nitrogen content of coal-fired products and civil coke have not been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) the dried lateritic nickel ore (from Gansu, China, its main mineral composition is lizardite, goethite and a small amount of hematite, wherein the nickel content is 1.12wt%), calcium carbonate additive raw material respectively through Coarse crushing and fine crushing to particle size ≤ 3mm;

[0026] (2) respectively take by weighing broken laterite nickel ore 60kg successively, calcium carbonate 20kg and mix it together, stir;

[0027] (3) Dry-grind the uniformly stirred mixture to make the raw material particle size ≤ 150 mesh (0.1mm); then calcined at 260°C for 2 hours, and cooled to normal temperature, which is the nickel-based composite additive;

[0028] (4) The furnace coal material is mixed with 20wt% long-flame coal, 15wt% lean coal, 30wt% 1 / 3 coking coal, 20wt% fat coal and 15wt% gas coal; The quality index is: V daf 30.0%, A d 13.5%, FC d 60.6%, S t,d 0.67%; cohesion index G=65, fineness (≤3mm)>90%;

[0029] (5) According to the nickel-based compo...

Embodiment 2

[0036] (1) The dried laterite nickel ore (from Indonesia, whose main mineral composition is lizardite, goethite and a small amount of hematite, wherein the nickel content is 1.34wt%) and calcium carbonate additive raw materials are respectively coarsely crushed , finely broken to particle size ≤ 3mm;

[0037] (2) Weigh respectively 55kg of broken laterite nickel ore and 25kg of calcium carbonate in turn and mix them together and stir evenly;

[0038] (3) Dry-grind the uniformly stirred mixture so that the particle size of the raw material is ≤150 mesh (0.1mm); then calcined at 260°C for 2 hours, and cooled to room temperature, which is the nickel-based composite additive;

[0039] (4) Furnace coal is blended with 20wt% long-flame coal, 15wt% lean coal, 25wt% 1 / 3 coking coal, 25wt% fat coal and 15wt% gas coal; the quality index of the blended coal For: V daf 28.5%, A d 13.5%, FC d 60.6%, S t,d0.67%; cohesion index G=62, fineness (≤3mm)=89.2%;

[0040] ⑸According to the n...

Embodiment 3

[0047] (1) The dried laterite nickel ore (laterite nickel ore originates from the Philippines, and its main mineral composition is lizardite, goethite and a small amount of hematite, wherein the nickel content is 1.23wt%), calcium carbonate and other additive raw materials Respectively through coarse crushing and fine crushing to a particle size of ≤3mm;

[0048] (2) Weigh respectively 50kg of broken laterite nickel ore and 30kg of calcium carbonate in turn, and mix them together and stir evenly;

[0049] (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;

[0050] (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)=8...

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Abstract

The invention discloses a nickel-based composite additive for reducing the nitrogen content of civilian coke. The nickel-based composite additive is prepared from the following components in parts by weight: 40-60 parts of laterite nickel ore and 20-30 parts of calcium carbonate. According to the nickel-based composite additive disclosed by the invention, the raw materials are widely available and abundant, and the price is low; the nickel-based composite additive is directly added into mixed coal; the civilian coke containing the nickel-based composite additive is prepared through high-temperature dry distillation, and the nitrogen contents in raw coal and final coke are 1.22wt% and 0.74wt% respectively; based on the coking rate of 70%, the nitrogen content reaches 57.47% in coal removal of a coal pyrolysis process.

Description

technical field [0001] The invention relates to a nickel-based composite additive for reducing the nitrogen content of civil coke, a preparation method and an application. Background technique [0002] Coal is the dominant energy 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. Due to the lack of effective flue gas dust removal and denitrification devices on small coal-fired boilers, the direct discharge of flue gas is one of the main sources of air pollution in my country. my country's coal-fired boilers have a large volume and a wide range, most of which are distributed in cities and their surrounding areas. The capacity of a single boiler is small, and small and medium-sized coal-fired industrial boilers of no more than 20t / h are mainstream products. Due to the relatively high economic investment in the in...

Claims

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Application Information

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IPC IPC(8): C10B57/06B01J23/78
CPCB01J23/78C10B57/06
Inventor 刘守军杜文广杨颂闫旭东闫志中郝志强
Owner TAIYUAN UNIV OF TECH
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