FIELD: reworking silicon-containing vegetable raw materials, including rice and oats.
SUBSTANCE: proposed method includes carbonization of initial raw material performed in vortex flow of oxidizing gas-heat carrier followed by separation of intermediate solid product and gaseous combustion products removed from roasting zone; proposed method includes also oxidizing roasting of carbonized intermediate product by passing the oxidizing gas through layer of product at rate ensuring "filtering layer" mode. Plant proposed for realization of this method includes two cylindrical furnaces interconnected through separation unit. First cylindrical furnace has branch pipe in its upper part for loading the raw material and pipe mounted inside furnace and used for tangential delivery of oxidizing gas-heat carrier through branch pipe fitted in lower part of said pipe. Second cylindrical furnace is provided with adjustable external heating system and oxidizing gas supply unit mounted in lower part and final product unloading unit mounted at its outlet. Separation unit includes device for removal of gaseous combustion products; initial raw material supply branch pipe, cylindrical furnaces, inner pipe and separation unit are located coaxially. Proposed method is used for production of silicon from vegetable raw material due to continuity of process at preset physico-chemical properties: purity, structure, specific furnace.
EFFECT: optimization and intensification of process.
10 cl, 1 dwg, 1 tbl
