METHOD OF PRODUCING CEMENT Russian patent published in 2012 - IPC C04B7/36 

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of producing water cement used in construction products. In the method of producing cement, involving grinding raw components, mixing, moistening the mixture, briquetting under pressure and then firing the obtained briquettes with size of not less than 20 mm, cement - calcium sulphoaluminate of the following composition in wt % is obtained: CaO 37.9, SiO₂ 0.96, Al₂O₃ 47.3, Fe₂O₃ 1.7, SO₃ 12.0, or the chemical composition, wt %: CaO 37.4, SiO₂ 0.99, Al₂O₃ 48.4, Fe₂O₃ 0.15, SO₃ 12.6, MgO 0.46, or portland cement with the following chemical composition, wt %: CaO 66.84, SiO₂ 22.07, Al₂O₃ 6.05, Fe₂O₃ 3.55, MgO 1.07, SO₃ 0.42, wherein components are mixed first and then dried and ground; moistening is carried out to 13%, briquetting is carried out under pressure of 100-300 MPa, and firing is carried out at temperature of 800-1300°C.

EFFECT: wider raw material base and range of obtained cement, low power consumption of the process and mass loss when producing cement.

3 ex, 8 tbl, 4 dwg