| 摘要 |
FIELD: construction. ^ SUBSTANCE: in method for production of gypsum construction material, including treatment phosphogypsum PG or phosphor-semihydrate PSH of calcium sulfate in runner mills after primary filtration PF with introduction of additive for neutralisation of acids, specified treatment is carried out for 4-12 minutes at the pressure of 1.0-6.5 MPa. Afterwards secondary filtration is carried out to reduce moisture of PG or specified PSH twice compared to moisture after PF. It is preferable to do treatment in runners for 8 minutes at the pressure of 1.0 MPa. ^ EFFECT: quicker hardening. ^ 2 cl, 3 ex, 2 tbl |
