Increase The Plasticity Of Raw Materials

In actual production, the main methods to increase the plasticity of raw materials are:
① Selecting materials to remove non plastic impurities such as quartz;
② The selected material is finely ground to increase its Dispersity;
③ Add an appropriate amount of plastic material binder, such as pulp waste liquid, dextrin, etc;
④ Vacuum extrusion treatment of mud;
⑤ Extend the trapped material time.
The binding ability of raw materials refers to the combination of clay materials and non plastic materials, forming plastic mud balls and possessing certain drying strength capabilities. The bonding property of bonded clay is usually reflected by the amount of standard quartz sand (particle composition of 0.25~0.15mm accounts for 70%, 0.15~0.09mm accounts for 30%) and the flexural strength after drying when it can form a plastic clay mass. Generally, the clay with strong plasticity has strong binding capacity (there are exceptions, for example, Nanning spherical clay is very pure with fine particle size and good plasticity. However, due to its large surface energy to absorb more water, large dehydration shrinkage during drying, and many cracks generated, the drying strength is poor. Its plasticity index can reach 36~47, while the bending strength is only 0.48Mpa.