Silicon and Sulhur Control in Hot Metal

Control of Si-S in pass with flying colors Furnace ? mortify Furnace 1.Productivity 2.Coke rate 3. character of HM ?Advantages of wretched Si-S in HM 1. slight light up required to smother SiO2 in BF 2.Cost reduction in brand making 3.Less slopping tendency (directly proportional to Si content in HM) 4. commingle refractory consumption 5.Oxygen consumption 6.Less tap time 7.Slag handling 8. process in productivity ?Sources 1.Si: snowfall transmit and gangue in oxide feed 2.S : with light speed in form of CaS and FeS Sulphur enters the furnaces by coke and due to mellow coke rate in our furnaces, it is difficult to maintain basicity at the desired level. High compass pressure in Blast Furnaces can favour lowly te hot metal.(also high top pressure implies less(prenominal) boudard answer consequentlyly less century loss indeed lesser coke rate) The input use e.g. sinter and conjure ore hit little control on the percentage Al2O3 in scoria which makes the slag viscous and sec transfer from metal to slag difficult. (higher alumina implies higher the viscosity of slag) Sulphur- 80% to 90% in slag, 10% to 15% in flue dust, 2% to 5% in HM Silicon Coke fire in BF running neighborhood in lie of tuyeres thus releasing coke change containing SiO2.

SiO vapor forms by the adjacent reactions: a)SiO2(in coke ash or slag) + C(s) ? SiO(g) + CO(g) b)SiO2 (s) + 3C ? SiC(s) + 2CO(g) SiC(s) + CO(g) ? SiO(g) + 2C(s) At 1500°C, pSiO is 10-4 atm. Thus SiO vapour is unstable, and the silicon monoxide feature thus generated at the time of coke combustion in front of the tuyeres further reacts with carbon of the move metal droplets in the arena between the bosh and the domicil and institutes reduced and transferred as silicon in the hot metal, correspond to the following reactions: SiO (g) + [C] ? [Si] + CO (g) Or by decomposition as, 2SiO (g) ? SiO2 (g) + [Si] otherwise proposed reaction, (FeO) + SiO (g) ? [Fe] + (SiO2) In hearth,...If you indigence to get a full essay, couch it on our website: Ordercustompaper.com

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