PULVERIZED-COAL INJECTION DEVICE, BLAST FURNACE FACILITY PROVIDED WITH THE SAME, AND PULVERIZED-COAL SUPPLYING METHOD
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United States of America Patent
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Issued Date -
Aug 13, 2015
app pub date -
Sep 10, 2013
filing date -
Sep 20, 2012
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Abstract
A pulverized-coal injection device is configured so as to inject pulverized coal from a tuyere of a blast-furnace main unit) together with heated, compressed injection air, and upgraded coal that has a self-heating property and that is upgraded from low-grade coal is used as a raw material for the pulverized coal. In addition, a heat exchanger is provided as a heat transporting unit for transporting heat due to a self-heating effect of this upgraded coal to a site requiring heat. This heat exchanger heats intake air by using the heat due to the self-heating effect of the upgraded coal that passes through the pulverized-coal supplying pipe to perform heat exchange with, for example, air that is taken into an injection-air feeding device. Furthermore, a deactivating unit for deactivating the upgraded coal such that a predetermined level of the self-heating effect thereof is retained may be provided.
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