Steel slag micropowder has long been included in international standards as cement admixture. Through a large number of comparative experiments, it has been proved that when the specific surface area of steel slag powder is above 420m2/kg, its activity is similar to that of blast furnace slag. On the basis of ensuring the performance of concrete, the replacement of cement by composite powder is increased, thereby further reducing the cost of concrete preparation; it has a significant effect on reducing the shrinkage and deformation of the binder, and greatly improves the crack resistance of the binder. effect. This indicates that steel slag micropowder products have a good market prospect. At present, due to the existence of free CaO and MgO in the steel slag, the stability of its volume is reduced; the high content of iron oxide increases the difficulty of grinding, the power consumption per ton of slag micropowder is high, and the processing of steel slag micropowder is difficult. Therefore, the sales volume of the steel slag micropowder market is relatively small, which also makes the steel slag micropowder an emerging market that has yet to be developed.

At present, the vertical grinding process technology is used to grind steel slag micropowder to produce products that replace cement clinker with high energy consumption, which is an advanced production technology in the industry. In the past, slag, steel slag, cement clinker, gypsum, etc. were usually put into the mill according to a certain ratio for grinding to produce cement. Due to the poor grindability of slag and steel slag, they cannot be ground very finely when mixed with cement clinker, and their performance cannot be fully exerted. The amount and application of slag and steel slag are limited. Grinding steel slag alone can be directly used as a product for concrete production and admixture according to market needs, or it can be configured as cement for sale by adjusting the fineness and dosage according to needs.

If the steelmaking waste slag produced by the iron and steel industry cannot be used reasonably, a large amount of land will need to be requisitioned for stacking. After a long time of stacking, it will condense into lumps and turn into waste, pollute the environment, waste resources, and increase the cost of processing waste slag by iron and steel enterprises. Steel slag is processed into ultra-fine powder, and its raw material is metallurgical waste slag from the metallurgical industry, which can become an important part of concrete. In the production process of steel slag micropowder, only part of the hot gas is needed to dry the water in the steel slag, and there is no smoke and dust emission. Iron and steel enterprises can take advantage of the existing regional location advantages of steel mills, and the source of raw materials is fully guaranteed; steel mills have advanced and strict scientific management experience, and have experienced technical teams and workforces to provide project implementation and market development. The guarantee of organization, technology and production management is guaranteed; the steel mill has reliable power supply and water supply sources, convenient transportation, good cooperation conditions and excellent construction conditions. In summary, the construction of steel slag micropowder projects by iron and steel enterprises can not only turn waste into treasure, increase the added value of steelmaking, and create considerable economic benefits for iron and steel enterprises, but also protect the environment, which is in line with the policy direction of structural adjustment of the steel and cement industries. The development of steel slag micropowder projects in iron and steel enterprises is of great significance and will play a positive role in promoting the sustainable development of the iron and steel industry.