Drilling waste-fly ash-shale base sintering product and preparation method
A technology for drilling waste and sintered products, which is applied in the field of waste resource recycling, can solve the problems of consuming large clay resources and destroying cultivated land, and achieves the effects of improving resource utilization, protecting cultivated land and reducing pollution
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Embodiment 1
[0025] Drilling waste mud is dried and ground to obtain drilling waste powder with a particle size of less than 0.15 mm. Feldspar and mica are uniformly mixed at a mass ratio of 2:1 to make a flux toughening agent. Shale and flux The molten toughening agent is ground to a particle size of less than 0.15 mm. Select each solid raw material according to the mass percentage of drilling waste 20%, fly ash 18% (particle size is less than 0.15mm), shale 60%, flux toughening agent 2%, and mix uniformly; Add solid raw material total amount 10 % water for 3 days; then formed into a blank by a vacuum extruder, placed at room temperature for 2 days, and then dried at 100±5°C for 2 days; heated at a rate of 3°C / min to About 400°C, then raise the temperature to 900°C at a heating rate of 3°C / min, keep it warm for 2 hours, and obtain a density of 1.75g / cm after cooling 3 , A sintered product with a compressive strength of 17.8MPa.
Embodiment 2
[0027] Drilling waste mud is dried and ground to obtain drilling waste powder with a particle size of less than 0.15 mm. Feldspar and mica are uniformly mixed at a mass ratio of 1:1 to make a flux toughening agent. Shale and flux The molten toughening agent is ground to a particle size of less than 0.15 mm. According to the mass percentage of drilling waste 10%, fly ash 20% (particle size less than 0.15mm), shale 65, and flux toughening agent 5%, select each solid raw material and mix them evenly; add 9.6% of the total amount of solid raw materials Aged in water for 3 days; then formed into a blank by a vacuum extruder, placed at room temperature for 3 days, and then dried at 100±5°C for 1 day; the temperature was raised to 400 at a heating rate of 3°C / min ℃, then increase the temperature to 950 ℃ at a rate of 4 ℃ / min, keep it warm for 3 hours, and after cooling, the density is 1.78g / cm 3 , A sintered product with a compressive strength of 21.7MPa.
Embodiment 3
[0029] Drilling waste mud is dried and ground to obtain drilling waste powder with a particle size of less than 0.15 mm. Feldspar and mica are uniformly mixed at a mass ratio of 1:1 to make a flux toughening agent. Shale and flux The molten toughening agent is ground to a particle size of less than 0.15 mm. According to the mass percentage of drilling waste 30%, fly ash 30%, shale 35%, flux toughening agent 5%, select each solid raw material, and mix evenly; ; then formed into a green body by a vacuum extruder, placed at room temperature to dry naturally for 3 days, and then dried at a temperature of 100±5°C for 1 day; heated to about 400°C at a heating rate of 3°C / min, and then dried at a temperature of 5°C The heating rate of ℃ / min is raised to 900 ℃, and the temperature is kept for 4 hours. After cooling, the density is 1.71g / cm 3 , A sintered product with a compressive strength of 15.6MPa.
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