Production method for superfine steel slag micro powder

Abstract

The invention relates to a production method for superfine steel slag micro powder. The production method is characterized by comprising the following specific steps: a steel slag processing metal recovery processing step; and an independent steel slag powder grinding step by a vertical mill: a steel slag powder collecting step and a superfine steel slag micro powder separating step, thereby preparing superfine steel slag micro powder with a specific surface area being 600-1000 m<2>/kg. The production method has the advantages that: steel slag powder is separated after being grinded by the vertical mill, superfine steel slag micro powder is extracted, process operation parameters are optimized, and powder producing load of the superfine steel slag micro powder is reduced by properly increasing fineness of the steel slag powder grinded by the vertical mill, so that a steel slag powder grinding production process and a superfine steel slag micro powder grinding production process are formed, and therefore, the production method is small in energy consumption and is high in feasibility in comparison with a mode of directly grinding the steel slag micro powder by the vertical mill.

Description

technical field [0001] The invention relates to a production method of superfine steel slag powder. Background technique [0002] The main chemical components of steel slag are CaO, SiO2, Fe203, Al2O3, MgO, P205 and MnO, among which tricalcium silicate and dicalcium silicate are similar to cement clinker, and the content of Cao is relatively high, and the alkalinity coefficient is usually above 2.0 , is a kind of material with good and potential hydraulicity. It should be the same as fly ash, slag and zeolite powder. It can be used as an admixture of concrete after grinding, so that a series of properties of concrete can be improved. [0003] At present, the specific surface area of ​​domestic steel slag tailings grinding is the main parameter reflecting its performance, which involves the unit water consumption during concrete production, the corrosion resistance of concrete, the rate of hydration heat analysis, and the strength of concrete in the later stage, while the cur...

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Problems solved by technology

[0003] At present, the specific surface area of ​​domestic steel slag tailings grinding is the main parameter reflecting its performance, which involves the unit water consumption during concrete production, the corrosion resistance of concrete, the rate of hydration heat analysis, and the strength of concrete in the later stage, while the current vertical mill The specific surface area of ​​the ground steel slag powder is 420~480 m 2 / kg, its specific surface area still has a large room for improvement, and the steel slag powder with high specific surface area is directly ground by a vertical mill, which consumes a lot of energy and is poor in feasibility. The production method of superfine steel slag powder is imperative

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