Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for reducing, quenching and tempering molten steel slags in reducing atmosphere
The invention relates to a method for reducing, quenching and tempering molten steel slags in a reducing atmosphere. The method comprises the following steps: firstly, crushing and grinding steel slags and a reducing component regulating material until the Blaine specific surface area is 200-400m<2>/kg, mixing a proper amount of water into the mixture, uniformly mixing, pressing the mixture into a pat, and baking; then, calcining the pat in a reducing atmosphere high-temperature furnace (the high-temperature electric resistance furnace is vacuumized firstly when a test is performed) at a temperature of 1300-1600 DEG C in a protective atmosphere, and insulating for more than 30 minutes to enable each component to carry out a chemical reaction at a high temperature; and finally, cooling, crushing and grinding the reduced material to prepare modified steel slag powder. According to the method, Fe2O3 and FeO in the steel slags can be reduced to zero-valent iron on the one hand, on the other hand, an iron-aluminum-calcium phase can be decomposed to release CaO, and the zero-valent iron and CaO are beneficial to formation of high cementitious activity silicate minerals, so that mineral composition of the steel slags can be essentially optimized, and the cementitious activity of steel slags is improved.
Method for reducing, quenching and tempering molten steel slags in reducing atmosphere
The invention relates to a method for reducing, quenching and tempering molten steel slags in a reducing atmosphere. The method comprises the following steps: firstly, crushing and grinding steel slags and a reducing component regulating material until the Blaine specific surface area is 200-400m<2>/kg, mixing a proper amount of water into the mixture, uniformly mixing, pressing the mixture into a pat, and baking; then, calcining the pat in a reducing atmosphere high-temperature furnace (the high-temperature electric resistance furnace is vacuumized firstly when a test is performed) at a temperature of 1300-1600 DEG C in a protective atmosphere, and insulating for more than 30 minutes to enable each component to carry out a chemical reaction at a high temperature; and finally, cooling, crushing and grinding the reduced material to prepare modified steel slag powder. According to the method, Fe2O3 and FeO in the steel slags can be reduced to zero-valent iron on the one hand, on the other hand, an iron-aluminum-calcium phase can be decomposed to release CaO, and the zero-valent iron and CaO are beneficial to formation of high cementitious activity silicate minerals, so that mineral composition of the steel slags can be essentially optimized, and the cementitious activity of steel slags is improved.
Method for reducing, quenching and tempering molten steel slags in reducing atmosphere
ZHAO SANYIN (Autor:in) / LI ZAIBO (Autor:in) / ZHAO XUGUANG (Autor:in) / HE TUSHENG (Autor:in) / CHEN YANZE (Autor:in)
02.12.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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