1, Ventilation strength - ventilation, heat up fast. Control of the intensity of ventilation can be used to adjust the gate, to change the grate gap, artificial blasting and other methods;
2, change the temperature into the kiln gas - into the kiln gas temperature is high, it is conducive to combustion and heating, preheating the air approach can increase the heating value into the kiln gas, thereby increasing the firing temperature.
3, to prevent cold air intrusion kiln - cold air intrusion kiln, will slow down the heating rate. In order to prevent gas into the kiln, should seal the kiln wall, to control the time and frequency of ash.
4, plus coal should also pay attention to control the amount of coal each time, control the size of coal (coal and more small air), control the time of coal, and master the method of adding coal.
Before burning the kiln, according to the characteristics of the fired billet to determine a curve of heating and cooling. The distribution of the curve is closely related to the following factors:
1, the composition and purity of the blank;
2, when the body into the kiln moisture content;
3, the thickness and size of the green body, body temperature conductivity;
4, the type of kiln, structure and capacity, as well as packing kiln density;
5, high temperature crystallization phase formation and transformation and the characteristics of billet. Medium-sized kilns, firing white porcelain heating rate in the following range: Dehydration - every hour heating 20-40 ℃, has been burning until 500 ℃; oxidation period - per hour heating 50-70 ℃, from 500 ℃ to about 900 ℃ so far; vitrification - temperature per hour 25-35 ℃, from 900 ℃ to 1350 ℃ so far; incubation period - about every hour about 5 ℃ to 15 ℃ warming. China's porcelain is generally fired at about 1320 ℃, but at present there are some producing areas where the kiln firing temperature has a tendency to high temperature firing temperature, such as some large porcelain factory in Hunan has reached 1410 ℃. Change the following factors, you can control the kiln temperature.