Blast furnace gas
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Metallurgical Engineering · all questionsIron Making in Metallurgy
Iron Making in Metallurgy
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The gas temperature at the tuyere's level is about . . . . . . . . degree centigrade.
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The chemical reserve zone in the blast furnace contains mainly of
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High top pressure in the iron blast furnace
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The carbon percentage of pig iron is
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In an ideal blast furnace, the input and output are as follows:
Input:
Ore, Pure Fe2O3, no gaunge : 1357kg/THM∗
Coke, Pure C, no ash : 400 kg/THM
Blast air, dry : O2 : 293 kg/HTM, N2 : 964 KG/THM
Flux : nil
Output :
Hot metal : 5wt% C, rest iron
Slag : nil
Top gas : CO, CO2, N2
∗ THM refers ton of hot metal (liquid pig iron) ; Atomic weights: C-12, O-16, Fe-56 The amount of oxygen in CO & CO2 leaving with the top gas is . . . . . . . . kg.
Input:
Ore, Pure Fe2O3, no gaunge : 1357kg/THM∗
Coke, Pure C, no ash : 400 kg/THM
Blast air, dry : O2 : 293 kg/HTM, N2 : 964 KG/THM
Flux : nil
Output :
Hot metal : 5wt% C, rest iron
Slag : nil
Top gas : CO, CO2, N2
∗ THM refers ton of hot metal (liquid pig iron) ; Atomic weights: C-12, O-16, Fe-56 The amount of oxygen in CO & CO2 leaving with the top gas is . . . . . . . . kg.
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To form basic slag, which of the following is added?
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The chemical reserve zone in the iron blast furnace consists mainly of
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The active metal mixer also does . . . . . . . .
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The permeability of burden in an iron making blast furnace can be improved by using
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The product of a commercial direct reduction process is
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Basicity of super-fluxed sinter is . . . . . . . .
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Desulfurisation of hot metal is favoured by
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An iron blast furnace produces hot metal containing 95% Fe. The iron ore charged into the furnace contains 95% Fe2O3 and the rest is gangue. Assume that all the iron in the ore goes to hot metal. The amount of iron ore (in kg) required for producing 1000 kg of hot metal is (Atomic weight of Fe = 56 g mol-1 and that of Fe2O3 = 160 g mol-1)
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In an iron blast furnace, the sinter is added in preference to iron ore lumps because, sinter
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Match the following blast furnace reactions with the regions where they take place. (Note that the underlined elements are present in the hot metal and the species in the parenthesis belong to slag phase).
| P. Fe3O4 + CO = 3FeO + CO2 | 1. Hearth |
| Q. C + 0.5 O2 + CO | 2. Tuyer |
| R. y . Fe + c = Feyc | 3. Stack |
| S. C + (CaO) + S = (CaS) + CO | 4. Bosh |
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Solid raw materials required to produce a ton of pig iron is about . . . . . . . . tons
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For efficient performance of a blast furnace, the extent of reduction of lustite should be
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Desulfurisation of molten pig iron outside the blast furnace is carried out by the
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Match the processes for alternate methods of producing iron in Group 1 with the type of furnaces listed in Group 2.
| Group 1 | Group 2 |
| P. MIDREX | 1. Rotary kiln |
| Q. SL/RN | 2. Retort |
| R. Echevarria | 3. Shaft furnace |
| S. FLOR | 4. Fluidised bed |
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