METHOD OF ROASTING V, Mo AND Ni-CONTAINING MATTER, AND ROTARY KILN FOR ROASTING OF V, Mo AND Ni-CONTAINING MATTER

摘要

A method of roasting in which both the C content and S content of roasted ore can be lowered to 0.5% or below and in which an Mo yield of 90% or higher can be ensured. For recovery of the valuable metals of V, Mo and Ni by reducing of a V, Mo and Ni-containing matter with the use of a reducing agent, in advance, a V, Mo and Ni-containing matter with C and S contents is subjected to oxidation roasting by means of rotary kiln (7) to thereby remove the C and S contents. Burner (11) is disposed on raw material charging side (8a) of roasting furnace (8) on which the V, Mo and Ni-containing matter with C and S contents as a raw material is charged, and within the roasting furnace (8), the direction of raw material transfer is arranged so as to be parallel to the flow of oxygen-containing gas introduced in the roasting furnace (8).