DEVICE FOR TRANSFERRING PRELIMINARILY REDUCED ORE IN IRON MAKING INSTALLATION BY MELT REDUCTION

摘要

PURPOSE:To smoothly transfer preliminarily reduced ore with gas to a melt reduction furnace by a simplified transfer piping line by taking the particles of the preliminarily reduced ore out of the mid-way of a circulation pipeline of a circulation device for particles provided to a fluidized bed preliminary reduction furnace and charging the particles into the melt reduction furnace. CONSTITUTION:Powder ore raw material A is preliminarily reduced with the reducing gas B from the melt reduction furnace 2 for melt reduction of the preliminarily reduced ore in the fluidized bed preliminary reduction furnace 1. The transfer line constituted by disposing a transfer pipe 10 connected to the circulation pipe 4 in the circulation device 3 for the particles of the preliminarily reduced ore consisting of a cyclone 5, hopper 6, circulation pipe 4 and pneumatic feeder 7 provided to the fluidized bed preliminary reduction furnace 1 is disposed as the transfer line for transferring the preliminarily reduced ore from the fluidized bed preliminary reduction furnace 1 to the melt reduction furnace 2 in the above-mentioned melt reduction installation. A pneumatic distributor 12 for branching the flow passage to a plurality is connected to the pipe 10 and the preliminarily reduced ore is preferably charged through plural distribution pipes 14, pneumatic nozzles 19 and blow nozzles 11 into the melt reduction furnace 2 to improve the reactivity of reduction.