GB/T 34175-2017 specifies the determination method of sulfur content in refractory materials. The standard specifies the scope of application, detailing the required instruments and equipment, such as high-frequency combustion infrared absorber, etc. Standardize the Sample Handling process, describing the combustion of samples under specific conditions, through the instrument to detect the content of sulfur in the generated gas, and then accurately determine the sulfur content of refractory materials. The standard provides key detection means for refractory production and quality control. Because the sulfur content affects the material performance, accurate determination can help improve the product mass and meet the performance requirements of refractory materials in high temperature industry.