Direct Observation of Melt Behavior During High Temperature Melt/Concrete Interactions

摘要

The feasibility of using a pulsed x-ray source and an x-ray image intensification system to provide continuous, real time data on high temperature melt behavior during interaction with concrete is demonstrated. A test of the system using a 1972g metallothermically generated melt interacting with limestone/common sand concrete is described. Analysis of the recorded x-ray image of the melt is used to determine the mode of melt contact with concrete, the time dependence of pool swelling due to entrained gas, and the nature of gas injection into the melt. Localized gas injection is found. Swelling of the pool increases with superficial gas velocity to an asymptotic limit. Results are shown to be consistent with the gas film model of melt-to-concrete heat transfer. The image data are used to assist interpretation of diagnostic data -- gas generation rate, gas composition and concrete temperatures -- gathered in the test.