Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1980-03-17
1984-08-07
Andrews, M. J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 37, 75 13, C21B 1312
Patent
active
044641974
ABSTRACT:
An improved method and apparatus for making metallic iron from iron ore including low-grade ore by the use of a solid reductant such as coal in a completely enclosed system wherein the heat for reduction originates from induction coils surrounding a vertical retort, said retort possesses compartments made of steel walls, which walls are heated by induction. The charge material made up of ore and coal are pre-mixed and charged into said compartments at the top of the retort and the iron ore is reduced while descending within said compartments so that when the charged materials reach the bottom of said compartments, the iron ore is metallized to elemental iron. A discharge means removes sections of the metallized iron from said shaft at a temperature of around 1,800.degree. and is fed into a mixer for liquification, desulfurization, and deganguing. The molten iron from the mixer is tapped into a ladle and is of high-quality iron equal in quality to blast furnace iron and suitable for charging directly into a steel making furnace. The slag material in the mixer is periodically removed from the mixer for disposal. In instances where the iron cannot be used in a molten state, it is passed through a pigging machine where it is solidified into pigs for subsequent use as a solid charge.
REFERENCES:
patent: 1759173 (1930-05-01), Smith
patent: 2509921 (1950-05-01), Gwynn
patent: 2704662 (1955-03-01), Kocks
patent: 2786747 (1957-03-01), Gallusser
patent: 3948640 (1976-04-01), Elvander et al.
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