Abstract: The mass and energy change speed of the TiB2 coating paste for aluminum electrolysis during its solidification and carbonization process was studied by the DTG and DDTA, and a reasonable heating program of solidification and carbonization was established. On this basis, the effect of heating program on the properties of TiB2 cathode coating was investigated. Results show that the heating program of variable speed is better than heating programs of invariable speed. The TiB2 cathode coating prepared by the established heating program possesses excellent properties, such as little deformation, no pores and fissure, great tensile strength of 3.13MPa, good electrical resistivity of 23.2μΩ·m. Contrary, the coating prepared by the heating programs of invariable speed has more deformation, some pores and fissure, tensile strength of 2.69MPa, electrical resistivity of 28.6μΩ·m.
Heating program for solidification and carbonization of TiB2 cathode coating in aluminum electrolysis
Abstract:
The mass and energy change speed of the Ti B 2 coating paste for aluminum electrolysis during its solidification and carbo nization process was studied by the DTG and DDTA, and a reasonable heating progr am of solidification and carbonization was established. On this basis, the effec t of heating program on the properties of TiB 2 cathode coating was investigate d. Results show that the heating program of variable speed is better than heatin g programs of invariable speed. The TiB 2 cathode coating prepared by the estab lished heating program possesses excellent properties, such as little deformatio n, no pores and fissure, great tensile strength of 3.13 MPa, good electrical re sistivity of 23.2 μΩ·m. Contrary, the coating prepared by the heating progra ms of invariable speed has more deformation, some pores and fissure, tensile str ength of 2.69 MPa, electrical resistivity of 28.6 μΩ·m.