|
| |
A method of obtaining pig iron, consisting of charging a retort with a
mixture of iron ore, coal, and enough water to form a paste; and injecting
compressed air at 2 to 4.2 kg/cm2 pressure and at 815 to 930
degrees C to burn the coal. In a few minutes the entire mineral charge is
heated to 980 to 1,095 degrees C, which is the optimum range for hydrogen
reduction; then hydrogen is injected at a temperature of 815 to 923
degrees C at 2 to 8 kg/cm2 pressure so that it penetrates the
entire mass and reacts with the iron oxide to produce steam and metallic
iron. About 50% of the injected hydrogen reacts with the ore to produce
sponge iron. Sulfur is oxidized by the hot air and is eliminated by the
hydrogen. Osborne
Source:
Dictionary of Mining, Mineral, and Related Terms
| |
|
