Method for preparing aggregates with high apparent density through industrial waste residues
A technology of apparent density and industrial waste residue, which is applied in the field of building materials to achieve the effects of alleviating supply shortages, being conducive to environmental protection and reducing development
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Embodiment 1
[0021] Take 50% of garbage incineration ash, 5% of chromium slag, 5% of lead slag, 5% of nickel slag, and 35% of clay by weight, and grind it to less than 100 microns; then add water accounting for 14% of the weight of the solid material, and stir to form a uniform Put the slurry into a molding machine, and extrude it into a 0.8cm ball with a pressure of 15MPa; put the prepared ball into a drying oven, and dry it at 105°C for 12 hours. Put the dried pellets into the muffle furnace, raise the temperature up to 300°C at a rate of 6°C / min, keep it warm for 20 minutes, then raise the temperature up to 1000°C at a rate of 8°C / min, and then increase the temperature from 3°C / min The heating rate is raised from 1000°C to 1175°C, and the calcination is completed at 1175°C for 20 minutes; the pellets are naturally cooled to room temperature in the muffle furnace to obtain aggregates with high apparent density.
[0022] The apparent density of the obtained aggregate is 2700Kg / m 3 .
Embodiment 2
[0024] Take 20% of waste incineration ash, 7% of chromium slag, 25% of lead slag, 8% of nickel slag, and 40% of clay by weight, and grind it to less than 100 microns; then add water accounting for 18% of the weight of the solid material, and stir to form a uniform Put the slurry into a molding machine, and extrude it into a 1.2cm ball with a pressure of 8MPa; put the prepared ball into a drying oven, and dry it at 105°C for 12 hours. Put the dried pellets into the muffle furnace, raise the temperature up to 300°C at a rate of 4°C / min, keep it warm for 30 minutes, then raise the temperature up to 1000°C at a rate of 8°C / min, and then increase the temperature by 3°C / min The heating rate is raised from 1000°C to 1150°C, and the calcination is completed at 1150°C for 10 minutes; the pellets are naturally cooled to room temperature in the muffle furnace to obtain aggregates with high apparent density.
[0025] The apparent density of the obtained aggregate is 2800Kg / m 3 .
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