| you are: the General scheme of manufacture of pottery
Durability of a raw increases in 2-3 times, i.e. Approximately in 1,5 times the dried up product is strengthened, durability of the burnt product increases to 2 times, its water absorption decreases on 10-15%.
The Way of moist pressing. Pottery is formed by way of moist pressing from mine with the humidity of 8 10% condensed with pressing under considerable pressure - 15-40 MPa. Ceramic press powders should have certain grain structure and humidity. Them prepare shlikernym and sushilno-pomolnym in the ways.
At sushilno-pomolnoj to clay preparation following operations are provided: 1) clay crushing on dezintegratornyh rollers; 2) clay drying in sushilnyh drums; 3) a grinding of the dried up clay in korzinchatyh dezintegratorah; 4) elimination of large grains on sitah; 5) humidifying of the powder which has passed through a sieve, the ferry to the uniform humidity of 8-10% necessary for pressing.
It is expedient to apply To a moist way of manufacture of clay with the small natural humidity, not demanding drying before a grinding. A way of moist pressing apply in manufacture of an ordinary and hollow clay brick, front tiles.
The Main advantage of moist pressing before plastic formation - reduction of expenses of energy. 1000 pieces of a raw of plastic formation with humidity of 18-22% are spent for artificial drying to 100 kg of conditional fuel.
The Way of moulding. We will consider features of a way of moulding with reference to manufacture thin (thickness of 2 mm) glazurovannyh mosaic tiles which serve for facing of facades.
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