In a blast furnace hematite is reduced to a sponge iron by carbon monoxide. The requirement for reduction is an excess of CO equation.
Fe2O3 + xCO = 2Fe + 3CO + (x − 3)CO
The volume ratio of the gas is CO/CO2 = 1.8
The furnace produces 800 tons Fe per 24 hours.
Coke contains 90%C and produces 2C + O2 = 2CO
Calculate:
a) The number of moles of MCO which is x
b) Coke consumption per ton Fe
c) The true CO/CO2 ratio if 200 kg of CaCO3 is added for each of tons of Fe2O3
reactions CaCO3 = CaO + CO2

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned

On a average work day more than work place firs are reorted