METHOD FOR RECOVERY OF METAL COMPOUNDS FROM THERMAL REPROCESSING OF METAL-CONTAINING RAW MATERIALS Russian patent published in 2006 - IPC C22B7/00 C22B34/34 

FIELD: metallurgy, in particular reprocessing of natural and technical raw materials, as well as hydrocarbon metal-containing composites such as skin, rubber, etc.

SUBSTANCE: claimed method includes metal recovery into volatile compounds under thermal treatment in superadiabatic seepage burning regime under high temperature in narrow reaction zone. Batch which represents mechanical mixture of solid components including metal-containing raw materials, solid fuel and inert incombustible filler is fed into reactor, wherein batch is heated in countercurrent of gaseous oxidant (e.g., air) through feeding material. Heating is carried out in seepage burning regime, and charged batch is sequentially passed though heating zone, volatile compound sublimation zone, burning (oxidizing) zone and volatile compound condensation zone, Mass ratio of gaseous oxidative agent consumption to fen in reactor batch solid fuel consumption, as well as flow rate of gaseous oxidative agent are controlled in such a manner that maximum temperature in burning zone achieves desired value, namely 850-1500°C. Method of present invention makes it possible to recover such metals as molybdenum, tungsten, zinc and/or compounds thereof from various technical raw materials and low-grade ores.

EFFECT: method of high yield and decreased energy consumption.

5 cl, 1 tbl, 12 ex