Title

SLOW COOLING CONVEYORS OF “HBI” ON MATESI D.R.PLANT

SLOW COOLING CONVEYORS OF “HBI” ON MATESI D.R.PLANT

Authorship

Capriotti, Luis Omar

Capriotti, Luis Omar

I am this author

DOI

10.5151/2594-357X-22401

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Abstract

Matesi DR plant is an HBI HYL III plant and has two reactors. Originally the MATESI DR Plant was equipped with 6 flooded cooling conveyors, one per each briquetting machine. The briquettes, after leaving the separator were having a sudden cooling. In July 2007: a new briquette cooling conveyor system was installed. The new briquette cooling system consists basically of a pan conveyor receives the briquettes from the briquetting machine and transport them to the cooling conveyor where controlled cooling of the briquette takes place. The cooling conveyor is able to sprayed water within a range flow of 2 m3/h to 15 m3/h, typical flow for the total production of the plant. This means that the flow used for cool down the whole production is less than the original water flow used in a single original cooling conveyor 55 m3/h x 6 = 330 m3/h. The pan conveyor receives the briquettes from the briquetting machine, in the MATESI DR Plant two pan conveyors are installed for each reactor furnace. The AUMUND cooling conveyor has a total length of 69 meters, and 2,4 meters wide. Due to this is a metallic conveyor, it is possible to avoid the injection of water allowing a slow cooling with inert gas (nitrogen) in the first 30 meters. The follow will show the drop test results of HBI produced in each of the reactors before and after modification. The drop index increases in around 12 points.

Matesi DR plant is an HBI HYL III plant and has two reactors. Originally the MATESI DR Plant was equipped with 6 flooded cooling conveyors, one per each briquetting machine. The briquettes, after leaving the separator were having a sudden cooling. In July 2007: a new briquette cooling conveyor system was installed. The new briquette cooling system consists basically of a pan conveyor receives the briquettes from the briquetting machine and transport them to the cooling conveyor where controlled cooling of the briquette takes place. The cooling conveyor is able to sprayed water within a range flow of 2 m3/h to 15 m3/h, typical flow for the total production of the plant. This means that the flow used for cool down the whole production is less than the original water flow used in a single original cooling conveyor 55 m3/h x 6 = 330 m3/h. The pan conveyor receives the briquettes from the briquetting machine, in the MATESI DR Plant two pan conveyors are installed for each reactor furnace. The AUMUND cooling conveyor has a total length of 69 meters, and 2,4 meters wide. Due to this is a metallic conveyor, it is possible to avoid the injection of water allowing a slow cooling with inert gas (nitrogen) in the first 30 meters. The follow will show the drop test results of HBI produced in each of the reactors before and after modification. The drop index increases in around 12 points.

Keywords

Metallic transport; Hot HBI; Slow cooling conveyor.

Metallic transport; Hot HBI; Slow cooling conveyor.