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Preparation method of biomass fuel applied to iron ore sintering

A biomass fuel and biomass technology, applied in the direction of biofuel, waste fuel, fuel, etc., to achieve the effects of inhibiting the generation of NOx pollutants, slowing down the combustion speed, and improving performance indicators

Active Publication Date: 2018-11-23
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the entire preparation method and application of biomass fuel for sintering, especially the use of CaO powder to fill and wrap biomass fuel has a great impact on the suppression of NO x generate little coverage

Method used

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  • Preparation method of biomass fuel applied to iron ore sintering
  • Preparation method of biomass fuel applied to iron ore sintering
  • Preparation method of biomass fuel applied to iron ore sintering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A preparation method of biomass fuel applied to iron ore sintering, comprising the following steps:

[0037] 1) Select sawdust as biomass, crush the biomass so that the particle size of the biomass reaches 5-10 mm (or if the particle size of the wood chips is small, no crushing treatment is required), and carry out normal temperature molding on the crushed biomass ( The temperature is 20-25° C.) to obtain molded biomass, wherein the pressure of normal temperature molding is 30 MPa, and the time of normal temperature molding is 60 seconds.

[0038] 2) The first stage of carbonization: in a nitrogen environment, use a controlled atmosphere resistance furnace to raise the formed biomass obtained in step 1) from room temperature 20-25°C to 400°C at a heating rate of 5°C / min;

[0039] 3) The second stage of carbonization: in a nitrogen environment, use a controllable atmosphere resistance furnace to heat up the shaped biomass obtained in step 2) to 600°C at a heating rate of...

Embodiment 2

[0043] A preparation method of biomass fuel applied to iron ore sintering, comprising the following steps:

[0044] 1) Selecting corn stalks as biomass, crushing the biomass so that the particle size of the biomass reaches 5-10 mm, molding the crushed biomass at room temperature (at a temperature of 20-25° C.) to obtain molded biomass, Wherein, the pressure of normal temperature molding is 50 MPa, and the time of normal temperature molding is 60 seconds.

[0045] 2) The first stage of carbonization: in a nitrogen environment, use a controllable atmosphere resistance furnace to raise the formed biomass obtained in step 1) from room temperature 20-25°C to 350°C at a heating rate of 10°C / min;

[0046] 3) The second stage of carbonization: in a nitrogen environment, use a controlled atmosphere resistance furnace to heat up the shaped biomass obtained in step 2) to 500°C at a heating rate of 20°C / min, and naturally cool to room temperature to obtain carbonized biomass;

[0047] 4)...

Embodiment 3

[0050] A preparation method of biomass fuel applied to iron ore sintering, comprising the following steps:

[0051] 1) Select fruit shells (a mixture of sunflower seeds, pine nuts and peanut shells) as biomass, and crush the biomass so that the particle size of the biomass reaches 5-10 mm (if the particle size of the selected fruit shells is small, it is not necessary to crushing treatment is required), the pulverized biomass is subjected to normal temperature molding (temperature is 20-25° C.) to obtain molded biomass, wherein the pressure of normal temperature molding is 40 MPa, and the time of normal temperature molding is 60 seconds.

[0052] 2) The first stage of carbonization: in a nitrogen environment (as a protective gas), the molded biomass obtained in step 1) is raised from room temperature 20-25°C to 400°C at a heating rate of 5°C / min using a controlled atmosphere resistance furnace;

[0053] 3) The second stage of carbonization: in a nitrogen environment, use a con...

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Abstract

The invention discloses a preparation method of biomass fuel applied to iron ore sintering. The preparation method comprises the following steps: smashing biomass to obtain shaped biomass; under the nitrogen environment, heating the obtained shaped biomass to 350 to 450 DEG C from room temperature at a heating rate of 5 to 10 DEG C / min; then heating to 500 to 650 DEG C at a heating rate of 15 to 25 DEG C / min and naturally cooling to room temperature to obtain carbonized biomass; smashing the carbonized biomass to obtain carbonized biomass particles; evenly spraying water with the mass as 6 to9wt% of the carbonized biomass particles on the carbonized biomass particles to obtain wetted carbonized biomass; evenly mixing the wetted carbonized biomass with CaO powder to obtain biomass fuel. Bymeans of the preparation method disclosed by the invention performance indexes of fixed carbon content, reactivity, combustibility and the like of the biomass are close to that of coke powder; furthermore, in a sintering process, generation of a calcium ferrite phase is facilitated, and performance indexes of sintered ore are improved.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy sintered fuel, and in particular relates to a preparation method of a biomass fuel applied to iron ore sintering. Background technique [0002] In recent years, smog has occurred frequently across the country, seriously deteriorating the living environment, endangering life and health, and causing great concern and anxiety in the whole society. PM2.5 is the "culprit" of haze weather, including primary particulate matter such as smoke and dust and SO 2 , NO x Secondary particulate matter transformed from gaseous precursors is difficult to control. The process structure of my country's iron and steel industry is dominated by the blast furnace-converter process. The source of pollutants in the sintering flue gas is closely related to the fuel combustion during the sintering process. More than 90% of the NO produced during the sintering process x Derived from organic nitrogen-cont...

Claims

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Application Information

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IPC IPC(8): C10L5/44
CPCC10L5/442C10L5/445Y02E50/10Y02E50/30
Inventor 刘超张玉柱赵凯邢宏伟康月石焱李杰
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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