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A kind of biomass char composite fuel for iron ore sintering

A technology of biomass coke and composite fuel, which is applied in the direction of waste fuel, fuel, solid fuel, etc., can solve problems such as the mismatch between the sintering combustion front and the heat transfer front, and the fuel combustion is not synchronized, so as to improve the coke reactivity and reduce the difference , cheap effect

Active Publication Date: 2017-11-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the asynchronous burning of the two fuels caused by the dispersion of the biomass charcoal and the fossil fuel in the sintering material layer, and the lack of matching between the sintering combustion front and the heat transfer front, and provide an alternative fossil fuel Biomass char composite fuel for iron ore sintering

Method used

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  • A kind of biomass char composite fuel for iron ore sintering
  • A kind of biomass char composite fuel for iron ore sintering

Examples

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Embodiment 1

[0025] A kind of biomass char composite fuel for iron ore sintering of the present invention, its density is 1.2~1.5g / cm 3 , volatile matter content is 5.59wt%, fixed carbon content is 76.35wt%; Its preparation method comprises the following steps:

[0026] 1) Grinding cotton stalks with a moisture content of 7wt% to a particle size of 1-2mm and gas coal with a moisture content of 3% to a particle size of 0.25-0.5mm; then spraying 20% ​​B 2 o 3 Solution (B 2 o 3 The spraying amount of the solution is 0.5% of the mass of the cotton stalk), and a KOH solution with a mass concentration of 65wt% is added to the gas coal (the amount of the KOH solution added is 0.15% of the mass of the gas coal).

[0027] 2) Mix the cotton stalks treated in step 1) with gas coal in a mass ratio of 1:4, and then mix them at 1500kg / cm 2 Under the pressure and temperature conditions of 300 ° C for 2 min, press into agglomerates with a particle size of 15 mm.

[0028] 3) The agglomerate made in st...

Embodiment 2

[0030] A kind of biomass char composite fuel for iron ore sintering of the present invention, density is 1.2~1.5g / cm 3 , volatile matter content is 5.31wt%, fixed carbon content is 78.03wt%; Its preparation method comprises the following steps:

[0031] 1) Grinding cotton stalks with a moisture content of 7wt% to a particle size of 1-2mm and gas coal with a moisture content of 3% to a particle size of 0.25-0.5mm; then spraying 20% ​​B 2 o 3 Solution (B 2 o 3 The spraying amount of the solution is 0.75% of the mass of the cotton stalk), and a KOH solution with a mass concentration of 55wt% is added to the gas coal (the amount of the KOH solution added is 0.15% of the mass of the gas coal).

[0032] 2) Mix the cotton stalks treated in step 1) with gas coal in a mass ratio of 2:3, and then mix them at 1250kg / cm 2 Under the pressure and temperature conditions of 275 ° C for 1.5 min, press into agglomerates with a particle size of 15 mm.

[0033] 3) The agglomerate made in ste...

Embodiment 3

[0035] A kind of biomass char composite fuel for iron ore sintering of the present invention, density is 1.2~1.5g / cm3 , volatile matter content is 5.02wt%, fixed carbon content is 79.70wt%; Its preparation method comprises the following steps:

[0036] 1) Cotton stalks with a moisture content of 7wt% were crushed to a particle size of 1-2mm, and gas coal with a moisture content of 3% was crushed to a particle size of 0.25-0.5mm; and then sprayed with 25% B 2 o 3 Solution (B 2 o 3 The spraying amount of the solution is 0.50% of the mass of the cotton stalk), and a KOH solution with a mass concentration of 40wt% is added to the gas coal (the amount of the KOH solution added is 0.10% of the mass of the gas coal).

[0037] 2) Mix the cotton stalk and gas coal treated in step 1) uniformly in a mass ratio of 3:2, and then mix them at 1000kg / cm 2 Under the pressure and temperature conditions of 250 ° C for 1 min, press into agglomerates with a particle size of 15 mm.

[0038] 3) ...

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Abstract

The invention discloses a biomass char composite fuel for iron ore sintering. A preparation method of the biomass char composite fuel includes: mixing high-lignin biomass sprayed by a B2O3 solution with weakly-caking coking coal added by a strong alkaline solution; pressing for 1-3min at pressure of 400-2000kg / cm2 and at temperature of 200-300 DEG C to form a block mass; increasing temperature to be 500-1000 DEG C at a rate of 5-25 DEG C per minute, and maintaining the temperature for 30-90min to obtain the composite carbonized fuel of 1.2-1.5g / cm3 in density, 3-6wt% in volatile matter content and 75-85wt% in solid carbon content. The biomass char composite fuel can completely replace fossil fuel to be used for iron ore sintering and is conducive to lowering generation quantity and emission quantity of NOx in the process of sintering, and environment pollution is reduced.

Description

technical field [0001] The invention relates to a composite fuel that can replace fossil fuels, in particular to a biomass coke composite fuel for iron ore sintering. Background technique [0002] Iron ore sintering is a process with high energy consumption and high pollution in iron and steel enterprises, and its process energy consumption accounts for 9-12% of the total energy consumption of iron and steel enterprises, of which 75-80% of energy consumption is provided by solid fuels such as coke powder and anthracite. The greenhouse gas CO is contained in the flue gas emitted by the combustion process of solid fuel 2 As well as polluting gases SOx and NOx, the emissions of the three account for 10%, 70%, and 48% of the total emissions of the steel industry, respectively. With the new standards of NOx, SOx, etc. stipulated in the "Steel Sintering and Pelletizing Industry Air Pollutant Emission Standards" on January 1, 2015, which have been implemented in existing enterpris...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L5/00
CPCY02E50/30
Inventor 范晓慧甘敏季志云陈许玲姜涛李光辉李强何向宁袁礼顺郭宇峰杨永斌张元波李骞黄柱成白国华许斌朱忠平周阳余志元刘树
Owner CENT SOUTH UNIV