Question

Which of the following statements about low shaft blast furnace is not true?

(a) In this, the blast is rich in oxygen

(b) The gas produced has a low calorific value

(c) The oxygen consumed by this furnace can be made available from natural air

(d) It consumes fine ores

I had been asked this question in final exam.

My question is taken from Ferrous Metals in portion Air Conditioning, Thermal Insulation, Stones & Ferrous Metals of Construction & Building Materials

Answer 1

Right option is (b) The gas produced has a low calorific value

For explanation: In a low shaft blast furnace, the blast is rich in oxygen. The oxygen consumed by this furnace can be made available from natural air. It consumes fine ores and the gas produced has high calorific value.