GB/T 2 2459.10 - 2025 "Refractory slurry - Part 10: Test method for heating permanent line change" focuses on the key indicators of refractory slurry performance detection. The standard specifies the whole test process in detail, covering the test principle, equipment and material requirements, clarifies the shape, size and quantity standards to be controlled by the sample prepative, standardizes the temperature setting, heating rate, holding time and other parameters during the heating process, specifies the specific method of size measurement before and after heating, Measuring location and data recording requirements, and also provides the result calculation and evaluation rules. The standard provides an accurate basis for scientifically evaluating the high temperature performance of refractory slurry and ensuring product mass, which is of great significance to high temperature industrial applications.