Reaction Behavior of Coke Lump in Raceway of Blast Furnace with Pulverized Coal Injection
| Autor: | Ichiro Naruse, Katsuya Nakayama, Khairil, Atsushi Higuchi |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Blast furnace
Pulverized coal-fired boiler business.industry Coke strength after reaction Chemistry Mechanical Engineering Metallurgy technology industry and agriculture Metals and Alloys Petroleum coke Coal combustion products Coke respiratory system complex mixtures respiratory tract diseases Mechanics of Materials Fly ash otorhinolaryngologic diseases Materials Chemistry Coal business |
| Zdroj: | ISIJ International. 40:744-748 |
| ISSN: | 0915-1559 |
| DOI: | 10.2355/isijinternational.40.744 |
| Popis: | Reaction behaviors of a coke lump in raceway of blast furnaces which pulverized coal injection technology was adopted were studied by using a horizontal pulverized coal reactor. In the experiments two types of coke lump were used as samples. In the experiments, the reaction behaviors of coke lump were continuously observed by an 8 mm video camera system. Mass change of the coke lump was weighed at each exposure time, and surface temperature of the coke lump was also continuously measured by a two-color pyrometer. Additionally, both the reacting coal particles and gas were sampled and analyzed, and the deposition on the coke surface was also analyzed. In order to elucidate the effect of ash particles in coal on the coke reaction, LPG was also supplied as a fuel into the reactor instead of coal. As a result, mass loss of coke in the coal combustion is larger than that in the LPG combustion. When the coal particles collide with the coke at the surface, the ash particles easily stick there and spherical molten ash is formed on the surface. For the LPG combustion, only small spherical molten ash resulted from the coke is formed. Those results suggest that ash particles of the coal may enhance coke degradation due to chemical interactions between coal ash and coke. |
| Databáze: | OpenAIRE |
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