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The polymorphic transformation of the monoclinic β-polymorph to the   orthorhombic γ-polymorph of di-calcium silicate at around 500°C during   cooling results in disintegration of slag. The slag generated, during the   production of thermo mechanically treated steel in ladle furnace at M/s Tata   Steel Limited, Jamshedpur, India, behaves in similar manner. An attempt has   been made to prevent the crumbling of ladle furnace slag. The experiments   were conducted in 10 kg air induction furnace. Various types of silica   source were used to prevent the disintegration of ladle furnace slag by   reducing the basicity and optimizing the additives amount. Apart from silica   sources, other additives like borax and barium carbonate were also used to   stabilize the β phase. Present investigation reveals that disintegration of   ladle furnace slag can be prevented either by addition of 0.2% boarx or 2%   barium carbonate. Dust formation can also be prevented by decreasing the   ladle furnace slag basicity to about 1.7. Toxicity Characteristic Leaching   Procedure test, of the borax and barium carbonate treated slag samples,   indicates that barium carbonate treated slag cannot be used for the dusting   prevention as it contains high level of barium

Treatment of LF slag to prevent powdering during cooling