INTRODUCTION:
Magnesium is the most efficient DS compound for Hot Metal Desulphurisation. Earlier it was used as a mono injection compound because of its high reactivity. Nowadays it is used in co-injection with either Fluidized Lime or Calcium Carbide.
APPLICATION:
To be used in Hot metal ladle at Hot Metal Desulphurisation Station. The treatment is mostly performed through pneumatic conveying system, N2 as a conveying media using dip lance injection. To get the best results it should be injected with lime or calcium carbide.
HOW IT WORKS:
Magnesium based DS Reagent has a boiling point of 1105 °C so when it comes in contact with hot metal(1250–1450° C) it vaporises. Magnesium gas dissolves into liquid iron and then it react with the dissolved S in the hot metal. The reaction is mainly gas/liquid reaction.
Reaction is as follows:
Mg + FeS = MgS + Fe
MgS + CaO = CaS + MgO
ADVANTAGE:
PACKAGING:
The reagent is supplied to the steel plant in transport bulkers with N2 gas inside. The reagent is unloaded by pneumatic means to the site storage silo.
DEMAG 97 Specification Sheet (pdf)
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