Related Questions

Out of the total production of iron from hematite, an ore of Iron, 20% of the ore gets wasted, and out of the remaining iron, only 25% is pure iron. If the pure iron obtained in a year from a mine of hematite was 80,000 kg, then the quantity of hematite mined from that mine in the year is
Which of the following statements are true with respect to iron ore?
I. Limestone and coal are important for smelting iron ore
II. More than 20% of the world iron ore deposits are in India
III. Odisha and Jharkhand top in the production of iron ore
IV. Iran is the largest buyer of Indian iron ore
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)
The following information is provided for an ore deposit:
Number of waste blocks = 10
Number of ore blocks = 5
Volume of each waste block, m3 = 600
Total cost of waste handling per m3 = Rs. 100
Tonnage of each ore block = 400
Total cost of ore handling per ton = Rs. 150
Sale price of ore per ton = Rs. 500
The net cash flow of mining the deposit in lakhs of rupees, is
An ore contains 25% of an alloy that has 90% iron. Other than this, in the remaining 75% of the ore, there is no iron. How many kilograms of the ore are needed to obtain 60 kg of pure iron?
Consider the following statements about Iron ore.
1. Iron ore was first discovered in Odisha by PN Bose in 1904.
2. The iron ore deposits of Odisha state occur in five districts including Koraput.
Which of the following statements is/are correct?
Which of the following oxides is not present in hematite iron ore?
An ore block of length 30m and height 20m having an average width of 1.5m with sharp boundary walls is mined with a minimum mining width of 2m. If the tonnage factors are 3 t/m3 for ore, 2 t/m3 for wall rock and average grade of ore is 10%, the diluted grade of ore mined in percent is
The stoping method selected, where ore body is thick veins type ore and walls are strong and steeply dipping ore i.e. footwall steeper than angle of repose of broken ore is . . . . . . . .
Hematite : Iron :: Sphalerite : ?