Answer & Solution
Answer: Option A
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42. The gas temperature at the tuyere's level is about . . . . . . . . degree centigrade.
43. The chemical reserve zone in the blast furnace contains mainly of
44. High top pressure in the iron blast furnace
45. The carbon percentage of pig iron is
46. 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.