A low-density fracturing proppant for coalbed methane exploitation and preparation method thereof
A fracturing proppant, low-density technology, applied in the fields of production fluids, chemical instruments and methods, applications, etc., can solve the problem of increasing the cost of fracturing construction in oil and gas production, the high production cost of ceramsite proppant, and the harm to the growth of people's animals and plants. and other problems, to achieve significant economic and environmental benefits, reduce solid waste accumulation and environmental pollution, and reduce mining costs.
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Embodiment 1
[0031] A low-density fracturing proppant for coalbed methane exploitation, which comprises the following raw materials in mass percent: 10% of low-grade bauxite, 30% of fly ash, and 60% of coal gangue.
[0032] Among them, in low-grade bauxite, A1 2 o 3 with SiO 2 The percentage by weight is: A1 2 o 3 62.75%, SiO 2 is 19.38%; in the fly ash, A1 2 o 3 with SiO 2 The percentage by weight is: A1 2 o 3 37.38%, SiO 2 is 41.53%; in the gangue, A1 2 o 3 with SiO 2 The percentage by weight is: A1 2 o 3 38.23%, SiO 2 is 46.50%. Its preparation method comprises the following steps:
[0033] 1) Raw material pretreatment: low-grade bauxite raw material is pretreated by light burning to remove crystal water. The light burning temperature is 650°C and the holding time is 1.5h.
[0034] 2) Grinding and mixing: Mix low-grade bauxite, coal gangue and fly ash in proportion to make a mixture, put it into a planetary ball mill, mix evenly and continue ball milling, the medium is...
Embodiment 2
[0041] A low-density fracturing proppant for coalbed methane exploitation, which comprises the following raw materials in mass percent: 15% of low-grade bauxite, 25% of fly ash, and 60% of coal gangue. Its preparation method comprises the following steps:
[0042] 1) Raw material pretreatment: lightly burn low-grade bauxite raw material to remove crystal water, the temperature of light burning is 750°C, and the holding time is 2h.
[0043] 2) Grinding and mixing: Mix low-grade bauxite, coal gangue and fly ash in proportion to make a mixture, put it into a planetary ball mill, mix evenly and continue ball milling, the medium is distilled water, the mixture: ball: water mass ratio is 1 ︰2:1, the ball milling time is 24 hours, until the slurry can pass through a 325-mesh standard screen, then pour the slurry into a tray, place it in an electric constant temperature blast drying oven and dry it at 110 ℃ for 11 hours, until the tray has a constant weight So far, the initial powder...
Embodiment 3
[0050] A low-density fracturing proppant for coalbed methane exploitation, which comprises the following raw materials in mass percent: 20% of low-grade bauxite, 30% of fly ash, and 50% of coal gangue. Its preparation method comprises the following steps:
[0051] 1) Raw material pretreatment: lightly burn low-grade bauxite raw material to remove crystal water, the temperature of light burning is 650°C, and the holding time is 1h.
[0052] 2) Grinding and mixing: Mix low-grade bauxite, coal gangue and fly ash in proportion to make a mixture, put it into a planetary ball mill, mix evenly and continue ball milling, the medium is distilled water, the mixture: ball: water mass ratio is 1 ︰2:1, the ball milling time is 24 hours, until the slurry can pass through a 325-mesh standard screen, then pour the slurry into a tray, place it in an electric constant temperature blast drying oven at 110 ℃ and dry for 12 hours, until the tray has a constant weight So far, the initial powder is...
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