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Daily-use Ceramic, Ceramic mugs, dinner set How to develop |
Ceramic Mug From:Xinxiang Ceramic Mug Manufacturers 2016-3-10 |
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Daily-use Ceramic, ceramic mugs, dinner set
Porcelain blanks in various gaseous medium is heated, the sintering temperature, the final sintering shrinkage, the shrinkage rate and the rates are not the same porosity, it should be the chemical composition of minerals in accordance with the blank, the different iron and titanium oxide content, to select a different atmosphere system. Southern District multi-use porcelain restore the flame burning system, that a small fire oxidation, fire reduction; northern porcelain district to use more full oxidation flame burning.
Formulate atmosphere system, but also to deal with the nature of the gas medium with the correct understanding. In general, the nature of the gaseous medium is based on the content of free oxygen in the combustion products and the reducing component to determine, when the capacity of the kiln having an oxidizing gas, the excess air factor which is greater than 1, the free oxygen content of 4 to 5% called common oxidizing flame; when the free oxygen content of 8 to 10%, the known strong oxidizing flame; when the oxygen content of 1 to 1.5%, the kiln having an oxidizing and a reducing gas is not capacity, the excess air factor is equal to 1, called neutral flame; when the free oxygen content of 0 to 1%, the kiln gas having reducing ability, the excess air factor is less than 1, known reducing flame.
For reducing flame firing ceramics, as far as possible so that the percentage concentration of O2 is less than l% or close to zero, the excess air ratio should be less than 1, the concentration of CO can be composed of 2 to 7 percent control in accordance with blanks.
The firing of the ceramic oxide flame, ?values porcelain stage should be controlled at 1.2 to 1.7. When heavy oil as fuel, ?value should be 1.1 to 1.3, with bituminous coal as fuel when, ?value of 1.3 to 1.7, with gas as fuels, ?value of 1.05 to 1.15; flue flue gas preheating zone summary the ?value of 3 to 5.
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