Title

THE PRODUCTION OF STALK CHAR AS PULVERIZED COAL INJECTION OF BLAST FURNACE

THE PRODUCTION OF STALK CHAR AS PULVERIZED COAL INJECTION OF BLAST FURNACE

Authorship

Lin, Wang; Jian, Pan; De-qing, Zhu; Guo-lin., Zheng

Lin, Wang

I am this author

Jian, Pan

I am this author

De-qing, Zhu

I am this author

Guo-lin., Zheng

I am this author

DOI

10.5151/2594-357X-22236

Downloads

Abstract

The blast furnace is the oldest metallurgical process in commercial use. It has gone through great improvements during the last decades and new important modifications are still foreseen. The huge amount of coal and coke needed for reduction of iron ore and energy is resulting in emissions of carbon dioxide that have to be strongly reduced to meet the requirement of minimizing the carbon footprint. Sustainable biomass production and its use for energy generation does not lead to net build up of CO2 levels in the atmosphere because CO2 released during its combustion is sequestrated during new growths. Furthermore, use of biomass can lead to net CO2 emission reduction if substituted for fossil fuels; the potentials of such substitution and GHG emission reduction in any country would depend on its sustainable biomass production potential. In this paper, the pyrolysis of three stalk to produce stalk char as pulverized coal injection of Blast furnace was studied to estimate the effect of pyrolysis conditions on product yield, calorific value and proximate analysis. Heating rate and pyrolysis temperature were the main experimental parameters. According to the test, when the heating rates were at 5°C/min, 10°C/min and 15°C/min, the low heating rate reacted more thoroughly, got high yield and kept more energy. As the pyrolysis temperature rising; namely 200°C, 300°C, 400°C and 500°C; the fixed carbon and gross calorific value were increasing to be 68% and 24.72 MJ/Kg respectively, but the yield was decreasing.

The blast furnace is the oldest metallurgical process in commercial use. It has gone through great improvements during the last decades and new important modifications are still foreseen. The huge amount of coal and coke needed for reduction of iron ore and energy is resulting in emissions of carbon dioxide that have to be strongly reduced to meet the requirement of minimizing the carbon footprint. Sustainable biomass production and its use for energy generation does not lead to net build up of CO2 levels in the atmosphere because CO2 released during its combustion is sequestrated during new growths. Furthermore, use of biomass can lead to net CO2 emission reduction if substituted for fossil fuels; the potentials of such substitution and GHG emission reduction in any country would depend on its sustainable biomass production potential. In this paper, the pyrolysis of three stalk to produce stalk char as pulverized coal injection of Blast furnace was studied to estimate the effect of pyrolysis conditions on product yield, calorific value and proximate analysis. Heating rate and pyrolysis temperature were the main experimental parameters. According to the test, when the heating rates were at 5°C/min, 10°C/min and 15°C/min, the low heating rate reacted more thoroughly, got high yield and kept more energy. As the pyrolysis temperature rising; namely 200°C, 300°C, 400°C and 500°C; the fixed carbon and gross calorific value were increasing to be 68% and 24.72 MJ/Kg respectively, but the yield was decreasing.

Keywords

Biomass; Pyrolysis; Stalk char; Thermogravimetric analysis (TGA).

Biomass; Pyrolysis; Stalk char; Thermogravimetric analysis (TGA).