W. Hammans

(Unitary Germany)

Abstract: Necessary investigations have been made on the economic problems of rapid firing and the quality of its products. The main opinions are as follows:

   Fast firing is a complex new technology field. Only close cooperation between ceramic manufacturers and designers of kilns and auxiliary equipment can promote the development of production technology.

The composition of raw materials, the molding method used in the product, the design and structure of the kiln, the burner system, the kiln furniture, the means of transportation inside and outside the kiln, etc., all these interdependent factors have an impact on production.

   Although the composition of raw materials and molding methods are not the subject of this article, in the firing process, it is necessary to consider the comprehensive impact of each link of production. Adjust the composition of raw materials to suit certain firing conditions. Similarly, the firing conditions must be adapted to the characteristics of the product during firing. When the firing cycle is shortened, this adjustment becomes more important. There is a certain limit to the increase in the firing speed, and it cannot exceed the speed allowed by the physical and chemical reactions of the product during the heating and cooling process. Choosing raw materials is beneficial to speed up the firing speed. If raw materials with less impurities are used, useless components in the raw materials are carefully removed, organic additives are used less on the premise of ensuring sufficient drying strength, and the content of free quartz is reduced. This auspicious, the tension on the body during firing will be reduced.

Keywords: rapid firing, structure of the kiln