Abstract: Research status and development trend of limestone instead of lime for steelmaking and slagging technology are systematically analyzed. Through comparative analysis, it can be seen that the current converter limestone slagging and steelmaking technology simplifies the entire slagging process, improves the slag dephosphorization effect, and reduces steel slag. The production volume has increased the economic benefit per ton of steel. On the whole, the limestone steelmaking slagging process is a high-efficiency, low-consumption, and environmentally-friendly new slagging method, which is of great significance to promoting energy conservation, emission reduction and sustainable development of steel enterprises. However, the decomposition of limestone requires a large amount of heat, which affects the slagging rate. Therefore, in order to further optimize the limestone steelmaking slagging process, a limestone powder spraying slagging technology is proposed, which can effectively solve the heat caused by the direct limestone slagging process. Slagging and CO₂ utilization problems caused by high consumption .