Study on Properties of Bauxite Slurry for Extrusion Forming Precision Cast Shell

The effect of preparation process parameters on the rheological properties of bauxite water-based slurry was studied. The extrusion properties of the slurry were analyzed. The feasibility of preparing casting shell with ceramic slurry layering was discussed. The results show that the viscosity of the slurry tends to be stable after milling for more than 8 h.When the solid volume fraction of the slurry is 38% and the dispersant content is 0.4%, the bauxite can be evenly dispersed in the liquid phase, and the viscosity of the slurry is appropriate. The viscosity of the slurry can be adjusted by pH value to meet the requirements of extrusion process, the bauxite slurry with good extrusion performance was determined. It can be used for extrusion forming of the sample and the test piece of the precision cast shell material.