Theoretically substantiated multistage carbonization process and changes of solid phase formation conditions at different stages of aluminate solutions decomposition. As a result of laboratory studies adequate mathematical dependences of process parameters on technologically significant factors were obtained. Their analysis made it possible to establish the decisive contribution of the technological mode of induction period to formation of the fractional composition of aluminum hydroxide precipitate. It was also shown that the increase in the yield of large fractions of synthetic gibbsite of spherulitic structure is provided by increasing the supersaturation of aluminate solution associated with an increase in the CO 2 content in the gas phase and blowing rate at all investigated temperature values.
