Direct smelting process

Details Direct smelting process Direct smelting process

C - Chemistry, Metallurgy

22

B

53/350

C22B 4/00 (2006.01) C21B 11/00 (2006.01) C21B 13/12 (2006.01) C22B 9/22 (2006.01)

Patent

CA 2025015

The present invention relates to a process for directly smelting ores, metal oxides or the like with a thermal plasma. The direct smelting process of the invention can be practiced easily by simple equipment regardless of the form of the material to be smelted without using any plasma forming gas. The present process is characterized in that a polyphase current voltage is applied to a multiplicity of graphite electrodes to cause arc discharge in air and produce a strongly reducing nontransferred plasma arc due to the resulting oxidation decomposition of the graphite electrodes. The plasma arc is jetted out from the tips of the electrodes directly against the material to be smelted.

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