PULVERIZED-COAL INJECTION DEVICE, BLAST FURNACE FACILITY PROVIDED WITH THE SAME, AND PULVERIZED-COAL SUPPLYING METHOD

摘要

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.

主权项

1. A pulverized-coal injection device configured so as to inject pulverized coal from a tuyere of a blast-furnace main unit together with heated, compressed injection air,
wherein 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.