A kind of preparation method of modified slag powder
A slag powder and modification technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of poor dealkalization effect and failure to meet the index requirements, and achieve simple production and operation process, The effect of improving performance indicators and broadening application channels
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Embodiment 1
[0032] Carry out heat treatment on the silicon-calcium slag (the same below) obtained by the method described in CN103332710A: heat-air-dry the silicon-calcium slag at 105° C. to remove moisture, and then burn at 600° C. for 100 minutes to obtain heat-treated silicon-calcium slag;
[0033] In parts by mass, with 54 parts of heat-treated calcium silicate slag, 10 parts of fly ash, 30 parts of slag, 5 parts of desulfurized gypsum, 0.15 parts of CGA, AS cement grinding aid and 0.85 parts of potassium sulfate, carbonic acid The mixture of sodium was mixed and milled for 20 minutes by a tube mill to prepare modified slag powder with a specific surface area of 520m 2 / kg.
[0034] After testing, the final modified slag powder has a fluidity ratio of 103%, a 28-day activity index of 109%, a chloride ion content of 0.04%, and a sulfur trioxide content of 2.5%, which fully meet GB / T18046-2008 S105 slag powder requirements.
Embodiment 2
[0036] Burn silicon-calcium slag at 300°C for 120 minutes to obtain heat-treated silicon-calcium slag;
[0037] In parts by mass, 60 parts of heat-treated calcium silicate slag, 15 parts of fly ash, 20 parts of slag, 4 parts of desulfurized gypsum, 0.1 part of TM, CAS, ZM cement grinding aid and 0.9 part of sodium phosphate , was ground for 20 minutes by a tube mill to prepare modified slag powder with a specific surface area of 420m 2 / kg.
[0038] After testing, the final modified slag powder has a fluidity ratio of 102%, a 28-day activity index of 96%, a chloride ion content of 0.04%, and a sulfur trioxide content of 2.6%, which fully meet GB / T18046-2008 S95 slag powder requirements.
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