Question

Определите массу железа,который можно восстановить водородом из 1 тонны красного железняка (Fe2O3),содержащего 28,6% примесей,при выходе железа 90% от теоретически возможного.

Answer 1

Дано:

m(Fe2O3)=1000кг

w(прим.)=28,6%

n(английская n загнутая)=90%

Найти:

m(Fe) - ?

Решение:

Fe2O3 + 3H2 = 2Fe + 3H2O

w(ч.в.)=100% - 28,6%=71,4%

m(ч.в.) = 1000кг : 100% * 71,4 = 714 кг

n(Fe2O3) = m : M = 714кг : 160 кг/кмоль = 4,4625кмоль

Из уравнения реакций n(Fe2O3)=2n(Fe)=8,925кмоль

теоретическая m(Fe)=n * M= 8,925кмоль * 56 кг/кмоль= 499,8 кг

практическая m(Fe)= m(теоретическая)* 90% : 100% = 499,8кг*90%:100% = 449,82кг

Ответ: 449,82кг.

Answer 2

Calculation of the Mass of Iron that can be Obtained from 1 ton of Red Iron Ore (Fe2O3)

To determine the mass of iron that can be obtained from 1 ton of red iron ore (Fe2O3), we need to consider the percentage of impurities and the iron yield.

Given: - 1 ton of red iron ore (Fe2O3) - The red iron ore contains 28.6% impurities - The iron yield is 90% of the theoretically possible amount

To calculate the mass of iron, we need to subtract the mass of impurities from the total mass of the red iron ore and then multiply it by the iron yield.

1. Calculate the mass of impurities: - The red iron ore contains 28.6% impurities. - Therefore, the mass of impurities is 28.6% of 1 ton. - Mass of impurities = 0.286 * 1 ton

2. Calculate the mass of pure iron: - The mass of pure iron is the total mass of the red iron ore minus the mass of impurities. - Mass of pure iron = 1 ton - Mass of impurities

3. Calculate the mass of iron obtained: - The iron yield is 90% of the theoretically possible amount. - Mass of iron obtained = Mass of pure iron * 90%

Let's calculate the mass of iron that can be obtained from 1 ton of red iron ore.

Calculation:

1. Calculate the mass of impurities: - Mass of impurities = 0.286 * 1 ton - Mass of impurities = 0.286 tons

2. Calculate the mass of pure iron: - Mass of pure iron = 1 ton - Mass of impurities - Mass of pure iron = 1 ton - 0.286 tons - Mass of pure iron = 0.714 tons

3. Calculate the mass of iron obtained: - Mass of iron obtained = Mass of pure iron * 90% - Mass of iron obtained = 0.714 tons * 90% - Mass of iron obtained = 0.6426 tons

Therefore, the mass of iron that can be obtained from 1 ton of red iron ore (Fe2O3), containing 28.6% impurities, with an iron yield of 90% of the theoretically possible amount, is approximately 0.6426 tons.