Method for roasting inclusions containing at least one of V, Mo and Ni and rotary kiln for roasting

摘要

Provided is a roasting method in which the C content in roasted ore can be reduced to 0.5% or less and the S content to 0.5% or less, and the yield of Mo can be secured to 90% or more. In order to recover V, Mo and Ni-containing materials with a reducing agent to recover valuable metals such as V, Mo and Ni, the V, Mo and Ni-containing materials containing C and S components in advance are oxidized and roasted with a rotary kiln 7. Bake to remove C and S. A burner 11 is provided on the raw material charging side 8a of the roasting furnace 8 into which V, Mo and Ni containing materials containing C and S as raw materials are charged, and the raw material moves inside the roasting furnace 8. The direction and the gas flow of the oxygen-containing gas introduced into the roasting furnace 8 are made parallel.