GB/T 29650-2013 specifies the test method for carbon monoxide resistance of refractory materials. The standard specifies the equipment required for the test, such as high temperature furnaces, gas supply devices, etc., as well as the sample preparation and test operation procedures, including the test process at a specific temperature and carbon monoxide atmosphere, and also describes the method of evaluating the results. Through this test, the performance of refractory materials in high temperature environments containing carbon monoxide can be accurately evaluated, providing an important basis for selecting suitable refractory materials for high temperature equipment such as industrial kilns and ensuring stable operation of equipment.