Active auxiliary cementitious material and method for on-line tempering and tempering of steel slag
An auxiliary cementitious material, conditioning technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., to achieve high-value utilization, eliminate the problem of poor stability, and eliminate the problem of iron enrichment. Effect
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Embodiment 1
[0035] The steel slag quenched and tempered active auxiliary cementing material of the present embodiment is weighed according to the following mass percentages:
[0036]
[0037] The specific preparation method is as follows:
[0038] (1) weigh slag, fly ash, metakaolin according to the proportion and fully mix, then heat to 1500 ℃ according to the heating rate 15 ℃ / min, maintain at this temperature, obtain mixture A;
[0039] (2) melting the steel slag, then directly flowing the molten liquid steel slag into the mixture A, stirring evenly, and keeping the temperature at 1500 ° C for 0.5 h to obtain the liquid mixture B;
[0040] (3) The liquid mixture B is directly poured into the circulating water for cooling, and the obtained quenched and tempered steel slag C is dried and ground to obtain an auxiliary cementitious material, which is the required finished product, with a specific surface area of 350 m 2 / kg. The finished product was added to cement to measure the ac...
Embodiment 2
[0042] The steel slag quenched and tempered active auxiliary cementing material of the present embodiment is weighed according to the following mass percentages:
[0043] Steel slag 60%,
[0044] fly ash 30%,
[0045] Metakaolin 10%.
[0046] The specific preparation method is as follows:
[0047] (1) Weigh fly ash and metakaolin according to the proportion and mix them fully, then according to the heating rate of 10°C / min, heat to 1400°C and maintain at this temperature to obtain mixture A;
[0048] (2) melting the steel slag, then directly flowing the molten liquid steel slag into the mixture A, stirring evenly and keeping the temperature at 1400°C for 1 hour to obtain the liquid mixture B;
[0049] (3) The liquid mixture B is directly poured into liquid nitrogen for cooling, and the obtained quenched and tempered steel slag C is dried and ground to obtain an auxiliary cementitious material, which is the desired finished product with a specific surface area of 365 m 2 ...
Embodiment 3
[0051] The steel slag quenched and tempered active auxiliary cementing material of the present embodiment is weighed according to the following mass percentages:
[0052] Steel slag 60%,
[0053] Fly Ash 40%.
[0054] The specific preparation method is as follows:
[0055] (1) Weigh fly ash according to the proportion, heat to 1400°C according to the heating rate of 20°C / min, and maintain at this temperature to obtain mixture A;
[0056] (2) melting the steel slag, then flowing the molten liquid steel slag directly into the mixture A, stirring evenly, and keeping the temperature at 1400 ° C for 0.5 h to obtain the liquid mixture B;
[0057](3) The liquid mixture B is directly poured into liquid nitrogen for cooling, and the obtained quenched and tempered steel slag C is dried and ground to obtain an auxiliary cementitious material, which is the desired finished product with a specific surface area of 360 m 2 / kg. The finished product was added to cement to measure the ac...
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Abstract
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