A method for preparing low-density ceramsite proppant using high-alumina fly ash as raw material
A high-aluminum fly ash and low-density technology, applied in chemical instruments and methods, earth square drilling, clay products, etc., can solve the problems of low utilization rate of fly ash, affecting the drying of slurry drying pellets, and high production costs , to achieve the effect of promoting particle rearrangement and mass transfer process, improving pulping and sintering performance, and solving the problem of difficult sintering and densification
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Embodiment 1
[0033] The chemical composition and mass ratio thereof of the formula raw material of the present embodiment are as follows: Al 2 o 3 : 44.6%, SiO 2 : 46.3%, Fe 2 o 3 : 1.9%, TiO 2 : 1.2%, CaO+MgO: 3.7%, Na 2 O+K 2 O: 0.5% and loss on ignition.
[0034] The raw materials used are: 140kg high alumina fly ash raw ash, 40kg high alumina fly ash burnt ash, 7kg kaolin, 3kg dolomite, 3kg talc, 7kg river sand, 0.3kg sodium polyacrylate, 0.3kg sodium tripolyphosphate , 0.06kg starch.
[0035] The preparation process includes the following steps:
[0036] (1) Part of the fly ash is dry ball-milled to a 325-mesh sieve and the residue is less than 0.5%;
[0037] (2) Using a rotary kiln, part of the high-alumina fly ash is calcined at a temperature of 1200°C; the calcining time is 2 hours, which is the high-alumina fly ash after burning;
[0038] (3) 40% high-alumina fly ash raw ash, 40% high-alumina fly ash burnt ash, 7% kaolin, 3% dolomite, 3% talc, 7% river sand, and 0.3% pol...
Embodiment 2
[0048] The chemical composition and mass ratio thereof of the formula raw material of the present embodiment are as follows: Al 2 o 3 : 45.5%, SiO 2 : 45.9%, Fe 2 o 3 : 2.0%, TiO 2 : 1.2%, CaO+MgO: 3.4%, Na 2 O+K 2 O: 0.4% and loss on ignition.
[0049] The raw materials used are: 180kg high alumina fly ash raw ash, 52kg high alumina fly ash burned ash, 8kg kaolin, 3kg dolomite, 3kg talc, 4kg river sand, 0.3kg sodium hexametaphosphate, 0.3kg tripolyphosphoric acid Sodium, 0.11kg polyvinyl alcohol.
[0050] (1) Part of the fly ash is dry ball-milled to a 325-mesh sieve with a residue of less than 0.5%, which is high-aluminum fly ash raw ash;
[0051] (2) Use a rotary kiln to calcine part of the high-alumina fly ash at a calcination temperature of 1100°C; the calcination time is 2 hours;
[0052] (3) 30% high alumina fly ash raw ash, 52% high alumina fly ash burnt ash, 8% kaolin, 3% dolomite, 3% talc, 4% river sand, plus 0.3% six by mass percentage Mix sodium metaphosp...
Embodiment 3
[0061] The chemical composition and mass ratio thereof of the formula raw material of the present embodiment are as follows: Al 2 o 3 : 44.8%, SiO 2 : 45.4%, Fe 2 o 3 : 1.8%, TiO 2 : 1.1%, CaO+MgO: 3.5%, Na 2 O+K 2 O: 0.6% and loss on ignition.
[0062] The raw materials used are: 107.9kg high alumina fly ash raw ash, 20kg high alumina fly ash burnt ash, 10kg kaolin, 2kg dolomite, 2kg talc, 1kg river sand, 0.3kg sodium citrate, 0.55kg tripolyphosphoric acid Sodium, 0.07kg gum arabic.
[0063] (1) Part of the fly ash is dry ball-milled to a 325-mesh sieve and the residue is less than 0.5%;
[0064] (2) Use a rotary kiln to calcine part of the high-alumina fly ash at a calcination temperature of 1250°C; the calcination time is 1 hour;
[0065] (3) 65% high-alumina fly ash raw ash, 20% high-alumina fly ash burnt ash, 10% kaolin, 2% dolomite, 2% talc, 1% river sand, and 0.3% lemon by mass percentage Sodium phosphate and 0.55% sodium tripolyphosphate are mixed evenly;
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