High-temperature molten slag basic performance test method and apparatus, and application method of apparatus

The invention discloses a high-temperature molten slag basic performance test method and apparatus, and an application method of the apparatus. The apparatus comprises a furnace body with an electric heating apparatus, a high-temperature thermocouple, an electric heating apparatus insulating layer inside, a test sample supporting rod capable of vertically penetrating through the furnace body, a laser source arranged outside the furnace body and aligned at a laser emission window of the furnace body, a high-speed camera corresponding to an observation window of the furnace body, a program-control data processing and display system connected with the high-speed camera and the high-temperature thermocouple, and an inflating apparatus and a vacuumizing pump connected with the furnace body. The apparatus is used for performing the molten slag basic performance test, a molten slag test sample is heated and molten in different stages in a simulation gas environment, the melting process of the test sample is observed