High carbon content briquettes

Details High carbon content briquettes High carbon content briquettes

2000-05-02

2001-05-22

King, Roy (Department: 1742)

Specialized metallurgical processes, compositions for use therei

Processes

Consolidating metalliferous material by agglomerating,...

C075S010330, C075S010330

Reexamination Certificate

active

06235085

ABSTRACT:

BACKGROUND OF THE INVENTION
The invention relates to briquettes which are useful as feed material, particularly in iron and steel making processes and, more particularly to a high carbon content briquette and process for preparing same.
The production of suitably stable agglomerates from fine or coarse particles of iron oxide for use as feed material in iron and steel making furnaces is a well-established and rapidly expanding field. Production of such agglomerates are accomplished by means of bonding particles using suitable cementing particles or binders, followed by sintering, firing and cementing procedures. Hot briquetting is a process whereby iron ore particles are agglomerated using compacting techniques and the proper combination of chemical reduction, heat and pressure. Briquettes produced using such techniques are commercially known as hot briquetted iron (HBI). The hot briquetting technique, without binders, has been successfully completed using highly metallized materials which contain from about 0.01% up to a maximum of 2% carbon. When the carbon content exceeds 2%, known compacting techniques do not provide a sufficiently stable agglomerate material.
Thus, the need exists for a process for preparing briquettes from starting material having a higher carbon content.
It is therefore the primary object of the present invention to provide a process whereby high-carbon content iron particles can be agglomerated so as to provide a suitable stable briquette.
It is a further object of the present invention to provide a process for preparing high carbon content briquettes with no additional binders, and containing no fused slag or vitreous phases.
It is a further object of the present invention to provide a high carbon content briquette which is useful as a feed material in iron and steel making furnaces, and which has excellent physical properties.
Other objects and advantages of the present invention will appear hereinbelow.
SUMMARY OF THE INVENTION
In accordance with the present invention, the foregoing objects and advantages have been readily attained.
According to the invention, a process is provided for preparing high carbon content briquettes, which process comprises the steps of providing a particulate material comprising iron particles including iron oxide in an amount of at least about 4% based on weight of said material, and carbon particles in an amount greater than about 2% based on weight of said material; and subjecting said material to briquetting temperature and pressure so as to provide stable agglomerate briquettes of said material.
In further accordance with the present invention, a high carbon content briquette is provided, which briquette comprises a stable agglomerate of iron particles and carbon particles, said iron particles including metallized iron and iron oxide, said iron oxide being present in an amount of at least about 4% based on weight of said briquette, and said carbon particles being present in an amount greater than about 2.0% based on weight of said briquette.


REFERENCES:
patent: 4731112 (1988-03-01), Hoffman

Affiliated with

Also associated with

Rating

High carbon content briquettes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High carbon content briquettes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High carbon content briquettes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2478563