What is the combination of raw materials of refractory bricks?

The combination of refractory brick raw materials refers to the combination of clay-based raw materials and non-plastic raw materials to form plastic mud masses and have certain drying strength capabilities. The binding property of the binding clay is usually reflected by the amount of standard quartz sand (particle composition 0.25～0.15mm accounting for 70%, 0.15～0.09mm accounting for 30%) and the flexural strength after drying. Generally, clays with strong plasticity have strong binding capacity (there are exceptions, for example, Nanning ball clay is very pure and has fine particle size, and has good plasticity. However, due to the large surface energy that absorbs more water, the syneresis during drying is large, and the resulting cracks are large. The dry strength is poor. Its plasticity index can reach 36-47, while the flexural strength is only 0.48Mpa.