What is the use of blast furnace slag powder?

Blast furnace slag is the waste slag produced when smelting pig iron, and it is also a kind of waste slag produced in a large amount in the metallurgical industry. The main component of blast furnace slag is silicate, and its content is stable, and its hydraulic activity and hydraulic coefficient are relatively high. It should be recycled to produce high value-added products, not piled up or buried in large quantities. The blast furnace slag has a variety of uses after grinding. The following are introduced for you:

Blast furnace slag has high potential activity. After grinding the blast furnace slag, under the action of hydration products of cement clinker minerals, lime, gypsum and other activators, it can react with water to generate hydration products such as hydrated silicates, which are hard and show high strength. High density, good heat resistance and other characteristics. Compared with cement clinker, it has great advantages. First, the chemical composition of blast furnace slag is relatively stable compared with fly ash and pozzolan. In addition it has very low heat of hydration, high resistance to sulphur and acidity, good workability, high strength limit, etc. These properties are beneficial for building bridges, dams, highways, seaports, and more.

Grinding blast furnace slag can obtain blast furnace slag micropowder. Blast furnace slag micropowder is a fine powder whose specific surface area reaches a certain level after blast furnace slag is dried, crushed, ground and screened. Generally, when the specific surface area of blast furnace slag micropowder exceeds 400m2/kg, it begins to have better activity and enhancement. Adding blast furnace slag micropowder as an admixture in concrete can improve the characteristics of concrete: improve the strength, impermeability, durability and corrosion of concrete, which can be used for the construction of large buildings.

Silicon fertilizer is a mineral fertilizer mainly containing silicon oxide and calcium oxide, and it is a nutrient element for many crops. The blast furnace slag contains a large amount of silicon oxide and calcium oxide. When the blast furnace slag grinding reaches 80-100 mesh, an appropriate amount of silicon activator is added, and then the silicon fertilizer can be obtained after stirring and mixing. Due to the photosynthesis of crops, silicon fertilizer can improve the quality of crops and increase the yield.

GKLM vertical roller mill can be used for blast furnace slag grinding. It has the advantages of high grinding efficiency, low power consumption, large feeding particle size, easy adjustment of product fineness, simple equipment and process flow, small footprint, and noise. It has the advantages of low dust, small dust, easy use and maintenance, low operating cost, and low consumption of wear-resistant materials.

GKLM series blast furnace slag vertical roller mill

【Powder fineness】: 22-180μm

【Production】：1-200t/h

【Application fields】: Building materials, chemical industry, metallurgy, coatings, papermaking, rubber, medicine, food and other fields.

【Applicable materials】: cement raw meal, clinker, lime powder for desulfurization in power plants, slag powder, manganese ore, gypsum, coal, barite, calcite, etc.