COMPOSITION AND A METHOD OF PRODUCTION OF CALCIUM SILICATE Russian patent published in 2005 - IPC

FIELD: rubber-processing industry; production of the industrial rubber goods.

SUBSTANCE: the invention is pertaining to the field of rubber-processing industry, in particular, to production of the industrial rubber goods used in medium of air, oxidants and other hostile environments. Composition and a method of production of calcium silicate are intended for manufacture of the industrial rubber goods working in medium of air, oxidants and other hostile environments. The technical result is an increase of pliability of the material and resistance to the hostile environments, a decrease of power input, reduction of duration of the production process. In the composition for production of calcium silicate containing a calcareous component - hydrated lime Ca(OH)₂ and a silicon-containing component use a hydrated lime containing(in mass %): active CaO + MgO - not less than 67, CO₂ - no more than 3, and in the capacity of the silicon-containing component - the white soot containing (in mass %): silicon dioxide - not less than 86, iron oxides - no more than 0.15, chlorides - no more than 1.0, calcium oxide - no more than 0.8, moisture - no more than 6.5. The method of production of calcium silicate provides for a preliminary mixing into suspension of the batched initial components - the hydrated lime and the silicon-containing component, filling-up with the indicated suspension of the molds, preliminary curing, the molds removal, a hydrothermal autoclaving and a drying. In the capacity of the above indicated source components use the indicated composition, preliminary curing conduct before obtaining of an initial strength of the raw up to 0.5-1.0 MPa, after the molds removal conduct loading of the raw in a trolley for feeding in a digester. The hydrothermal treatment conduct in the following mode: 2 hours - rise of pressure up to 0,5 MPa, curing within 8 hours and refrigerating within 1-2 hours, and the drying conduct at the temperature of 105°- 150°C up to a residual humidity of no more than 2-5 % of the mass. Then conduct crushing of the produced product, its fine grinding, packaging in airproof packaging materials and storing.

EFFECT: the invention ensures increased pliability of the material and its resistance to the hostile environment action, decreased power input, reduced the production process duration.

2 cl, 1 ex, 1 tbl