Method for smelting reduction of iron ore

Details Method for smelting reduction of iron ore Method for smelting reduction of iron ore

1988-11-28

1991-03-19

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75502, C21B 1108

Patent

active

050007840

ABSTRACT:
A method for smelting reduction of iron ore comprises the steps of: preheating and prereducing iron ore; charging said preheated and prereduced iron ore, carbonaceous material and flux into a smelting reduction furnace; blowing oxygen gas through a top blow oxygen lance having decarburizing nozzles and post-combustion nozzles into said smelting reduction furnace, an end of said top blow oxygen lance being arranged between an upper side level of a slag layer and a lower side level of said slag layer; blowing a stirring gas through at least one side tuyere placed in side wall of said smelting furnace and at least one bottom tuyer placed in bottom wall of said reduction furnace so that at least part of said stirring gas introduced through at least one said side tuyere hits a swollen portion of the molten metal by said stirring gas introduced through at least one said bottom tuyere; and controlling a flow rate of said oxygen gas and said stirring gas blown in said smelting reduction furnace so that an OD of infurnace gas of said smelting furnace ranges 0.5 to 1.0, where said OD is represented by the following formula: OD=(H.sub.2 O+CO.sub.2 )/(H.sub.2 +H.sub.2 O+CO+CO.sub.2). And, further, an apparatus used in the above-mentioned method.

REFERENCES:
patent: 3711275 (1973-01-01), Johnsson
patent: 4504311 (1985-03-01), Weiner

Affiliated with

Also associated with

Rating

Method for smelting reduction of iron ore does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for smelting reduction of iron ore, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for smelting reduction of iron ore will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2007781