US 4,378,994 AGranted

Method for estimating geographical distribution of cohesive zone in blast furnace

AssigneeKobe Steel, Ltd.

InventorsKiichi Narita, Shinichi Inaba, Masakata Shimizu, Kenichi Okimoto, Isao Kobayashi

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Abstract

A method for estimating the geographical distribution of a cohesive zone in a blast furnace which is intermittently charged with an iron ore material to produce molten iron substantially in a continuous manner is disclosed. The method comprises altering the whole or part of the composition of the charging iron ore material at a certain time point, measuring variations in the composition of produced molten iron ore slag over a given time period, and estimating the shape of the cohesive zone in the furnace on the basis of a pattern of variation of one selected component and the speed of gravitational descent of the charged material through the furnace.

Claims5

Dependent claims

A method for estimating the geographical distribution of a fusion belt in a blast furnace which is intermittently charged with an iron ore material to produce molten iron in a continuous manner, said method comprising:

altering at least a part of the composition of the charging iron ore material at a certain time point;
measuring variations in the composition of the produced molten iron ore and slag over a given time period;
and
estimating from said measured variations, the shape of said fusion belt in said furnace wherein the shape of said fusion belt is estimated from a relation of a pattern of variation of at least one selected component of said furnace at a point downstream from said fusion belt and the speed of gravitational descent of said charged material in said furnace.

1 more element

Dependencies are inferred from the claim text.