FEED COMPOSITION FOR ALUMINA PRODUCTION Russian patent published in 2021 - IPC C01F7/16 C07F7/20 C01F7/38 

FIELD: nonferrous metallurgy.

SUBSTANCE: invention relates to nonferrous metallurgy and can be used to obtain alumina and associated products by sintering from high-silicon alumina raw materials. The composition of the feed for the production of alumina includes kaolin ore and limestone. The feed additionally contains a carbon-containing additive, and its composition satisfies the following content of raw materials, wt. %: kaolin - 68.5-72.3; limestone - 26.3-28.6; carbon-containing additive 0.5-3.8, the amount of which is determined experimentally according to the controlled parameters of the technological process.

EFFECT: increase in the chemical extraction of Al₂O₃ and an expansion of the raw material base of alumina production due to the use of kaolin ores of various compositions, which is achieved due to the fact that a carbon-containing component is introduced into the feed composition in an amount that provides the best conditions for the formation of the phase composition of the sinter, favorable for subsequent processing.

1 cl, 1 tbl, 25 ex