Swelling of Iron Ore Pellets under Non-isothermal Condition

Abstract

In the present investigation an attempt has been made to study the swelling behaviour of iron ore pellets. The test were conducted under non-isothermal condition in the temperature range 800-1000°C. The variable parameters studied are partial pressure of carbon monoxide gas, flow rate and heating rate. The experiments were statistically designed so that the effect of each variable and interactional effect of different variables can quantitatively be assessed. Attempt has also been made to know the effect of gangue content and porosity of the pellet. The results show increased swelling index with increase in heating rate, partial pressure, flow-rate and porosity and with decrease in gangue content. The regression equation obtained after statistical analysis is given by
Y=52.875+8.625X₁+7.625X₂+2.375X₃
Where, X₁, X₂ and X₃ represent the heating rate partial pressure and flow rate in coded form: Y=Swelling index of the pellet.