Modified fuel for reducing NOx emission in iron ore sintering process based on reduction and catalysis, and preparation method thereof

A technology for sintering and catalyzing iron ore, which is applied in chemical instruments and methods, fuels, solid fuels, etc., can solve the problems of low efficiency of nitrogen oxide emission reduction and reduction of NOx emission, so as to improve emission reduction rate and avoid obstacles , Improve the effect of catalytic effect

Pending Publication Date: 2019-01-11
ANHUI UNIVERSITY OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to provide a modified fuel and its preparation method based on the reduced emission of NOx in the sintering process of iron ore for the low efficiency of nitrogen oxide emission reduction in the sintering process in the prior art; The crushed sinter and fuel are dry-blended to prepare a modified fuel, which can effectively reduce NOx emissions by mixing the modified fuel into the sinter mixture

Method used

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  • Modified fuel for reducing NOx emission in iron ore sintering process based on reduction and catalysis, and preparation method thereof
  • Modified fuel for reducing NOx emission in iron ore sintering process based on reduction and catalysis, and preparation method thereof
  • Modified fuel for reducing NOx emission in iron ore sintering process based on reduction and catalysis, and preparation method thereof

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Embodiment 1

[0029] like figure 1 Shown, a kind of preparation method of the modified fuel used for reducing NOx emission in the sintering process of the present invention, the steps are: the sintered ore fine material is dried, and then the dry sintered ore fine material is added under the condition of not adding water Dry blending into the fuel to obtain a modified fuel; the specific steps are:

[0030] (1) Finely grind the sintered ore to obtain sintered ore fine material; the specific steps are: select the sintered ore with a particle size larger than 5 mm, add the sintered ore to the crusher for crushing, and finely grind the sintered ore after the crushing is completed, so that The particle size of the finely ground sintered ore is less than 0.5mm;

[0031] (2) Add the sinter fine material into the fuel for dry blending without adding water to prepare the modified fuel; the specific steps are: under dry conditions, first add the fuel into the blender, and then Add the sinter fines ...

Embodiment 2

[0036] The basic content of this embodiment is the same as that of Embodiment 1, except that the sintered ore with a particle size greater than 8 mm is selected for fine grinding, and the sintered ore used in this embodiment is +8 mm blast furnace return ore.

[0037] Put the mixed material on the trolley, ignite the mixed material, ventilate and sinter, and detect the NO in the sintering flue gas in the main sintering flue gas pipeline X content, and recorded as shown in Table 2.

Embodiment 3

[0039] The basic content of this embodiment is the same as that of Embodiment 1, except that the sintered ore with a particle size greater than 15 mm is selected for fine grinding, and the sintered ore used in this embodiment is the sintered bottoming material.

[0040] Put the mixed material on the trolley, ignite the mixed material, ventilate and sinter, and detect the NO in the sintering flue gas in the main sintering flue gas pipeline X content, and recorded as shown in Table 2.

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Abstract

The invention discloses a modified fuel for reducing NOx emission in an iron ore sintering process based on reduction and catalysis, and a preparation method thereof, and relates to the technical field of emission reduction of sintering pollutants. The modified fuel comprises agglomerate and a fuel, the addition of the agglomerate is 0.5-5% of the total mass of the fuel, and ground agglomerate andthe fuel undergo dry mixing to prepare the modified fuel. Fine agglomerate formed after crushing the agglomerate in the modified fuel is loosely distributed surrounding the fuel and mixed in a sintering mixture after being fully drily mixed with the fuel in order to promote the effective reduction of NOx generated in combustion, and the fine agglomerate can efficiently catalyze the reduction process of the NOx generated by the fuel in order to achieve the efficient emission reduction of the NOx in the agglomerate sintering process.

Description

technical field [0001] The invention relates to the technical field of emission reduction of sintering pollutants, and more specifically relates to a modified fuel and a preparation method thereof for reducing NOx emissions based on reduction-catalysis iron ore sintering process. Background technique [0002] NOx is one of the main air pollutants at present. In the atmosphere, NOx is easy to form acid rain and photochemical smog, which affects the ecological environment and endangers human health. The status of NOx emissions in the iron and steel industry is particularly severe. According to statistics, the emission of NOx gas in the iron and steel industry accounts for about 10% of the total industrial emission, and the sintering process is one of the main sources of NOx, accounting for about 50% of the total NOx emission. The energy consumption of the iron ore sintering process is mainly the consumption of fossil fuels such as solid fuel coke powder and anthracite coal, ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/00B01D53/86C22B1/16B01D53/56
CPCB01D53/8625B01D2255/2045B01D2255/20738C10L9/00C22B1/16
Inventor 春铁军阮志勇龙红明王子宏余正伟谢运强甘牧原刘华陈阳吴丹伟向小平莫龙桂韦振宁梁杰群潘晶
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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