Mill Scale Briquettes

Today’s Steel Mills’ ECONOMIC & ECOLOGICAL solution

Mill Scale Briquettes as replacement of Scrap as a Coolant in Steel Melt Shops

Primary steelmaking process is led by basic oxygen process in a LD converter for converting molten pig iron to steel by blowing oxygen. The blowing process is exothermic and generates a lot of heat. The converter is therefore charged with upto 20% scrap in order to cool down the reaction heat.

Scrap or eventually sponge iron plays two roles: significant iron raw material and coolant. Variation in scrap quality, amount, and charging in converter can greatly influence the process “path.”Due to the shortage of scrap, sinter or iron ore are used. They cause red fumes that can impact the areas of oxygen jets at the hot metal surface, have safety, pollution concerns.

An important event is charging scrap: falling heavy scrap can cause strong impact against converter bottom and lower wall.

To overcome the price fluctuations and technical disadvantages of scrap, iron ore or sinter, we suggest our Mill scale briquettes as a replacement of scrap or secondary coolants like iron ore or sinter.

Procedure:

Addition shall be done by continuous feeder
Handling through ground hopper to bunkers at the LD converter for continuous feeding
Add approximately 60% of the briquettes early in the blow alongwith lime when sufficient carbon from the hot metal is available to reduce the oxide and balance in phased manner to enhance
de-phosphorisation
Mill scale briquettes will act as a coolant and also control the blow.

BMet Mill Scale Briquettes

Advantages:

Major cost savings
High iron bearing material with low impurities
As a coolant can be considered on par with Iron ore and sinter and with respect to steel scrap it is 2-3 times more effective
Easy foamy slag generation
Low hot metal ratio
Environment friendly
Can replace 2 Tons of scrap for every ton
No adverse effect on lining wear and slag FeO