Study on Preparation of Iron Powder and Nano-Carbon Black by Reaction Process of High-Iron Bauxite and Natural Gas

Abstract

In this paper, high-iron bauxite was reduced deeply using natural gas as reductant in a closed circulation reduction furnace and then it was disposed by ball milling and magnetic separation. The results of study showed: when the optimum conditions of reduction of high-iron bauxite were that a temperature of 900°C, a reaction time of 120 min and a material thickness of 5 mm, iron powder and carbon black can be obtained, the particle size of iron powder was about 50∼200 nm, and the carbon black was about 30∼100 nm.