The invention belongs to the technical field of metallurgical material performance testing, and particularly relates to a method for testing molten iron
erosion resistance of a blast-furnace
tuyere surface protective layer. The test method comprises the following steps: S1, selecting a base material, preparing a protective layer on the surface of the base material, and
processing a sample into a
test sample piece after preparation, and S2, constructing a high-temperature
smelting furnace to simulate a high-temperature environment in a
blast furnace; s3, simulated molten iron is prepared, and the prepared simulated molten iron is placed in a molten iron containing container; s4, immersing the
test sample piece into the simulated molten iron in the high-temperature
smelting furnace, and controlling the temperature and the test time of the simulated molten iron; the temperature in the high-temperature
smelting furnace and the component change of the simulated molten iron are monitored in real time; s5, ending the test, taking out the
test sample, observing the
microstructure change of the protective layer on the surface of the test sample, and analyzing the
element composition and content change; the
erosion rate of the protective layer is calculated by measuring the
mass loss and the
size change of the test sample; and S6, comprehensively evaluating the molten iron
erosion resistance of the protective layer according to various data.