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B.S. SPONGE PRIVATE LIMITED Village: Taraimal, Tehsil: Gharghoda, District: Raigarh, (C.G.) REIA Report for the Proposed Mini Integrated Steel Plant Chapter – 2 The other consumables of the process include oxygen lancing pipes and oxygen used for opening the furnace tap-holes, and the refractory for the lining of pans / runners used for alloy collection. PROCESS DESCRIPTION: - Standard Silico Manganese is smelted at about 1700 – 1800 ºC. This is achieved by a conventional Submerged Arc Electric Furnace. The three carbon electrodes, partially submerged in the charge, are supported on hydraulic cylinders for upward and downward movements to maintain the desired electrical conditions in the furnace. The body of the furnace is cylindrical in shape, and is lined with firebricks, silicon carbide bricks and carbon tamping paste. Two tap-holes are provided at 120º. Apart form draining out both the molten alloy and the slag. During the repair works of one of the tap holes the other will function as standby. The raw materials are thoroughly mixed in the proper proportion before being charged into the furnace. Manual poking rods or stoker car are used for stoking the charge on the furnace top. As the charge enters the smelting zone, the alloy formed by chemical reactions of the oxides and the reductant, being heavy gradually settles at the bottom. The slag produced by the unreduced metal oxides and the flux, being relatively lighter, floats on the alloys surface. At regular intervals the furnace is tapped. The tap hole is opened by Oxygen lancing pipe and after tapping is completed, it is closed by clay plug. The liquid Silico manganese and the slag flow into the C.I. Pan. The slag being lighter overflow from the C.I. Pan and is taken into the sand mould. PIONEER ENVIRO 2 - 17 <strong>Environment</strong>al Impact Assessment Report Laboratories & Consultants Pvt. Ltd.
B.S. SPONGE PRIVATE LIMITED Village: Taraimal, Tehsil: Gharghoda, District: Raigarh, (C.G.) REIA Report for the Proposed Mini Integrated Steel Plant Chapter – 2 The alloy cake from C.I. Pan is removed and broken manually with hammer to required lump size. The slag produced in the process, generally free from metal, after cooling is removed by lorry to the slag dump. 2.5.5.5 POWER GENERATION: (TOR # 21) Waste Heat Recovery Boilers will be installed behind the ABC of DRI kiln in bypass configuration. The flue gases after ABC will be taken to unifired furnace chamber and then flow over banks of super heater, convective evaporator and economizer before being discharged to atmosphere through ESP, ID fan and stack. 12 MW electricity will be generated from WHRB. In the Fluidized Bed Combustion boiler envisaged, combustion of fuel particles is achieved in suspension with an inert aggregate i.e. sand. Combustion air will be fed through air nozzles from underneath into the sand fuel bed. Oil burner will be provided for start up and low load flame stabilization. The fuels proposed in FBC Boiler are Char & Coal. The flue gases will pass over various heat transfer surfaces to ESP and then finally discharged through ID fan and stack. 36 MW of Power generation proposed through FBC Boiler. The condensate after condenser of STG will be pumped to a common deaerator by condensate extraction pumps. Feed water from the deaerator will be pumped to the waste heat recovery boiler as well as FBC boiler by boiler feed pumps. The steam generated from both the WHRB and FBC boilers will drive the steam turbine through a common steam header to generate 48 MW of Electricity. The power generated will be used for captive consumption. Process flow diagram is shown as figure 2.1. PIONEER ENVIRO 2 - 18 <strong>Environment</strong>al Impact Assessment Report Laboratories & Consultants Pvt. Ltd.
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DATA ON EXISTING PLANT (TOR # 15) A
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17 Permission for the drawl of 3,80
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bs sponge private limited - India Environment Portal

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