PURPOSE: To obtain inexpensively a ferrous alloy of the component condition desirable for post-stages by matching a preliminary reduction furnace suitable for a stationary operation and a melt reduction furnace of a top and bottom blown converter type suitable for a non-stationary operation.
CONSTITUTION: Two units of reaction vessels of a top and bottom blown converter type and a preliminary reduction furnace which preheats and preliminarily reduces ore contg. iron oxide or the molding thereof by the high temp. waste gas from said vessels are combined. The operation in said reaction vessels is then divided to the two for the period when the preheated and the preliminarily reduced ore or the molding thereof is charged and for the period when the same is not charged; at the same time, the operation cycles are shifted from each other. The preheated or preliminarily reduced ore or molding is charged into either of the reaction vessels of the top and bottom blown converter type.
KUWABARA MASATOSHI
ISHIKAWA HIDEKI
SAITOU TSUTOMU
INOUE NORIYUKI
FUJITA MASAKI
JAPAN METALS & CHEM CO LTD