C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/118
C22B 1/00 (2006.01) C22B 34/10 (2006.01)
Patent
CA 1080978
Abstract of the Disclosure A method of treating raw materials containing components of metals of the group IVb of the Periodic Table, which comprises heat-treating a raw material of a component of a metal of the group IVb of the Peri- odic Table containing coloring poisonous metal compo- nents such as Mn, V and Cr components in the presence of a flux composed mainly of an alkali metal nitrate or an alkali metal peroxide which is a thermal decom- position product of the alkali metal nitrate in an amount 2 to 5 times the amount of the raw material on the weight basic in a non-reducing atmosphere to thereby effect fluxing reaction, and subjecting the resulting fluxing reaction product to a leaching treatment of at - 1 - least one stage in an aqueous medium to separate the fluxing reaction product into said coloring metal com- ponents and a concentrate of the component of the group IVb of the Periodic Table which is acid-soluble and substantially free of said coloring poisomous metal conponents. In practising this treating method, if a residue left after the above leaching step is incorpo- rated into a mixture of the raw material and the flux, the composition is granulated and the granulated com- position is heat-treated, the fluxing reaction of the raw material can be accomplished while keeping the granulated composition in the substantially non-sticky granular state throughout the fluxing heat treatment.
251606
Maruyama Noboru
Naito Hiroyuki
Noshi Yoshibumi
Sugahara Yujiro
Takai Kiyoshi
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