With the continuous implementation of environmental policies, the resource recovery and utilization of spent refractories have gradually drawn industry-wide attention. Waste furnace lining refractories can be processed via crushing, impurity removal, modification and other procedures to serve as recycled raw materials for manufacturing castables, precast blocks and other products, reducing the extraction of natural ores. Recycled refractory products are suitable for zones with relatively mild working conditions such as cement kilns and metallurgical furnaces. While meeting required service performance, they help optimize the overall project cost. Many market participants have established collection channels for spent refractories and advanced solid waste treatment processes. This circular resource model helps the industry curb carbon emissions from production and supports the sustainable development of the sector.