I. Project Introduction In 2016, China's total energy consumption was 4.36 billion tons of standard coal, accounting for 23% of the global total. China's oil import volume has been continuously rising, and in 2016, China's oil dependence on imports reached 65%. In 2017, China's energy consumption per unit of GDP was about 3.57 tons of standard coal per ten thousand US dollars, which is twice that of the United States and 2.25 times that of Germany. The extensive use of fossil fuels has led to an increasing concentration of greenhouse gases in the atmosphere, intensifying the greenhouse effect. CO2 reduction has received widespread attention from the international community, and research on efficient energy-saving technologies is urgent. The metallurgical industry consumes a huge amount of energy, with the steel industry alone generating 350 million tons of liquid slag in 2017, each ton of slag containing sensible heat equivalent to 60kg of standard coal. For high-quality waste heat resources such as liquid slag (metallurgical slag from blast furnaces), Currently, there are no mature recycling technologies in place, resulting in a significant amount of sensible heat energy being wasted. The potential for energy conservation and emission reduction is immense. The existing liquid slag treatment technologies mainly include dry processing and wet processing methods. Dry processing has lower investment costs, simpler operation, saves a large amount of water, reduces the possibility of explosions, does not require drying of the slag, and eliminates emissions of harmful gases such as SO2 and H2S. It recovers the residual heat contained in high-temperature slag. Liquid slag treatment technology utilizes the principle of centrifugal granulation, where molten slag poured onto a rotating cup is granulated by the high-speed rotation of the cup, followed by the recovery of residual heat from the high-temperature slag particles. Secondly, technological innovation and leadership: (1) Good granulation effect with an average particle size of 2mm and a vitrification rate of 95% for slag particles; (2) Granulated slag particles rich in glassy phase, which can be used as a high-value-added raw material for cement; (3) The dry centrifugal granulation and waste heat recovery equipment is simple and consumes less power. Third, technical features: (1) Granulation bin - The optimized granulator ensures uniform slag particles with an average diameter of about 2mm, ensuring a high glass content. The optimized granulator reduces the sliding speed between the molten slag and the granulator, lowering the motor speed and power consumption. The use of air quenching further enhances the convective heat transfer of the molten slag, improving the granulation effect. A water wall is set up to enhance the radiative heat transfer of the slag. (2) Moving bed - The molten slag undergoes rapid cooling at high temperatures and slow cooling at low temperatures, ensuring the quality of the slag while reducing the airflow and simultaneously improving the quality of air energy. The combination of air and water walls solves the problem of uneven cooling or high fan power consumption. The non-uniform cross-section arrangement of the moving bed ensures that slag particles are not blown out of the moving bed by the airflow. The slag and air are arranged in countercurrent to improve heat transfer efficiency and achieve energy cascade utilization. (3) Waste Heat Recovery System: The arrangement of water-cooled walls in the granulation bin and moving bed can effectively save the number of boiler pipes and manufacturing costs. The arrangement of water-cooled walls in the granulation bin can efficiently recover high-temperature waste heat resources. The boiler adopts natural circulation to reduce pump power consumption. Fourth, Market Prospect and Application: In 2017, the processing, manufacturing, and installation of the world's first set of liquid slag dry centrifugal granulation and high-efficiency waste heat recovery equipment for an 1800m³ blast furnace were completed. It provides a complete solution for the entire process of liquid slag storage and flow control + centrifugal granulation + waste heat recovery, with a waste heat recovery efficiency of up to 75%, good economic benefits, and extremely broad market prospects. Taking the example of an 1800m3 blast furnace with a daily slag discharge of 2000 tons, the investment in dry centrifugal granulation and waste heat recovery equipment is 55 million yuan, the annual operating cost is 14 million yuan, and the annual income is 71 million yuan. The investment cost can be recovered within one year. It is expected that 1200 sets will be put into the market, with an estimated annual income of 43.2 billion yuan.