| 摘要 |
FIELD: construction.SUBSTANCE: production of granulated gypsum from acid wastes of hydrogen fluoride production, includes neutralisation of the specified wastes and granulation, as a neutralising agent they use carbonates of alkaline metals, the technological process is carried out in the pelletization mode in contact with aqueous solution, with subsequent calibration of finished product by size, grinding and recycling of minus fractions.EFFECT: increased speed of acid fluoride hydration, increased initial strength of granules and provision of stable mode of granulation.2 cl, 1 dwg |
