In the research and development of ceramsite formula, in addition to common raw materials and auxiliary materials, sintered ceramsite generally needs some additives. These additives are not necessary. Whether they are used or not should be determined according to different technological requirements, fineness and quality of fly ash, properties of sintering equipment and other factors.
There are many kinds of admixtures. At present, the admixtures commonly used in sintered ceramsite in China mainly include flux, water reducing agent and correction agent.
(1) flux there are two functions of flux: one is to reduce the sintering temperature, make the ceramsite easy to be roasted, and reduce the additional fuel to reduce the sintering cost; The other is to increase the viscosity of the liquid phase, make the firing degree of ceramsite better
There are two series of flux: one is iron series; The other is alkali series. One can be used alone or two can be used together. Iron flux can increase product density, and its dosage should be controlled.
(2) water reducing agent the main function of water reducing agent is to reduce the water consumption during molding and granulation. After the water consumption is reduced, the energy consumption of evaporating water can be reduced when the ceramsite is roasted, and the external fuel or no fuel can be reduced, thus improving the molding performance.
(3) correction agent correction agent has many functions. It can adjust the density of ceramsite and also correct various chemical components of fly ash. When some components of fly ash do not meet the technical requirements, they can be adjusted by adding correction agent until they meet the technical requirements. In addition, it can also correct the adhesion of clay and some chemical components. In a word, the correction agent is the adjustment supplement, which is used to adjust the shortage of various materials to make it more in line with the need of ceramsite sintering.
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