| you are: the General scheme of manufacture of pottery
Trolleys with the products, making a continuous train, move to furnaces and constantly pass zones of heating, roasting and cooling: at giving of a new trolley with a raw in a zone of heating the cooling zone leaves a trolley with the burnt products. 123456
Hence, process of roasting of pottery can be divided into three consecutive stages conditionally:
1) gradual removal of a moisture from a raw,
2) raw roasting,
3) gradual cooling of the burnt products.
The Maximum temperature of roasting of a brick and others stenovyh pottery (950-1000°С) is necessary for sintering of ceramic weight. Sintering occurs owing to cementing action rasplava evtektik (liquid sintering), reactions in a firm phase and crystallisation of new growths. 123456
At superfluous quantity rasplava that is characteristic for perezhoga, products get out of the shape, are melted off from a surface. nedozhog it is caused by incompleteness of process of sintering. It is shown in characteristic signs: ' scarlet ' colour of a brick, durability decrease, strong reduction of water resistance and frost resistance, etc. 123456
In tunnel furnaces of slot-hole type uniformity of roasting, and consequently, high quality and uniformity of production is reached. 123456
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