In order to increase the utilization rate of recycled refractory,the industry standard of the recycled castable and ramming refractory used in blast furnace trough has been established.The composition and performance data of the recycled castable and ramming refractory are collected and analyzed,the technical conditions of related products are discussed,and the content and formulation requirements of the industry standard are introduced.It is concluded that the performances of recycled castable and ramming refractory should be controlled through composition requirements and the lining quality should be ensured by controlling the physical index such as strength and permanent change in dimension on heating etc.The establishment of appropriate industry standards for recycled castable and ramming refractory used in blast furnace trough is conducive to improving the utilization rate of recycled refractory materials and reducing environmental pollution.