11 Thermo chemical Attack Corrosion 12 Function Of Furnace Heating Of Solid

11 thermo chemical attack corrosion 12 function of

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Physical Abuses Such As Abrasion, Erosion Etc. 11. Thermo-chemical Attack : Corrosion 12. Function Of Furnace: Heating Of Solid, Melting, Heating Of Gases, Hydrocarbons, Etc. 13. Gas Composition Within The Furnace (Sulfur, Sodium, Potassium, Chlorine, Hydrogen Etc.) 14. Expected Life Of Furnace 15. Cost And Economics 16. Ease Of Installation, 17. Future Ease Of Maintenance & Repair 9
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SELECTION OF REFRACTORIES Chemical Composition Apparent Porosity Bulk Density Co-efficient Of Thermal Expansion Permanent Linear Change Refractoriness Under Load Pyrometric Cone Equivalent 10
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SELECTION OF REFRACTORIES Thermal Conductivity Spalling Resistance Performance Under Various Gaseous Atmosphere Permeability Mechanical Strength (Room Temperature & High Temperature) Abrasion / Erosion Resistance Resistance To Chemical Attack 11
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HEAT FLOW CALCULATION INPUT: Operating Temperature Ambient Temperature Operating Pressure External Wind Velocity Thermal Conductivity Emissivity Heat Flow Direction Inside Gas Composition ( Hydrogen, Etc .) 12 OUTPUT: External Shell Temperature Interface Temperature Heat Loss From Surface
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THERMAL / HEAT FLOW CALCULATION 13 Layer 1 : IFB, Gr. 28 Layer 2: IFB, Gr. 23 Layer 3: Fibre Block 1100 ° C Layer 4: Fibre Block 800 ° C Layer 1: MW Concrete Layer 2 : CRF Board 1260 ° C Layer 3 : Fibre Block 1000 ° C Layer 4: Fibre Block 800 ° C Layer 1 : CRF Modules 1430 ° C, 192kg/m ³ Layer 2 : CRF Blanket 1260 ° C Layer 1 : CRF Blankets 1430 ° C, 160kg/ ³ Layer 2: CRF Blanket 1260 ° C Heat Flow Calculation for: t AMB =27 ° C, t INS =1200 ° C, wind=0m/s, ε =0.95 t OUTS =72 ° C q loss =576 W/m ² t OUTS =78 ° C q loss =676 W/m ² Water Content 92kg/m ² t OUTS =73 ° C q loss =601 W/m ² t OUTS =69 ° C q loss =528 W/m ² HOT
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LINING THICKNESS Factors Determining Thickness : Operating Temperature Corrosion, Erosion Etc. Thermal Calculation Design Casing Temperature Strength Installation Method Service Life 14
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LINING STRUCTURE AND SELECTION OF MATERIALS SINGLE LAYER: Low Operating Temperature Less Severe Conditions MULTI LAYER: High Operating Temperature, Low Heat Loss Requirement Severe Conditions COMBINED: Combination Of Brick, Block, castable, Ceramic Fibre Material 15
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LINING FOR MOLTEN STEEL / SLAG Linings Consist Of A Safety Lining And A Working Lining Safety Lining
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