Preparation method for improving compressive strength of quartz sand proppant for fracturing
The technology of sand proppant and compressive strength is applied in the field of preparation of improving the compressive strength of quartz sand proppant for fracturing, and can solve the problem of failure to effectively improve the compressive strength of quartz sand particles, reduce the output of the production process, and reduce the particle size. sphericity and other issues, to achieve the effect of reducing long-distance transportation costs and processing costs, improving the utilization rate of finished products, and improving sphericity
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Embodiment 1
[0056] Sampling 1000 grams of raw materials of 100 tons of natural quartz sand particles purchased in Zigong, Sichuan and divided them into two parts of 500 grams each. Sieve and measure the crushing rate after drying indoors. The quartz sand has been cleaned and preliminarily screened by a professional sand washing factory before it is purchased into the factory.
[0057] After testing, the quartz sand particles contain 0.03% mud, the sieve residue of particles with a particle size greater than 1.2 mm is 0, and the water content is 7%. Confirm that it can go directly to the vertical shaft crusher for production.
[0058] Another part of the quartz sand sample was dried, and then sieved by a standard sieving machine for testing to separate 160 grams of 40-70 mesh quartz sand and 265 grams of 70-140 mesh quartz sand. Using a microscope to test separately, the roundness of 40-70 mesh quartz sand is 0.3, and the sphericity is 0.35; the roundness of 70-140 mesh quartz sand is 0....
Embodiment 2
[0073] 30 tons of the finished 40-70 mesh quartz sand proppant for fracturing produced in Example 1 were used, and the operations of Step 2 and Step 4 were repeated again to further improve the compression resistance.
[0074] It should be noted that the 40-70 mesh fracturing quartz sand proppant produced in Example 1 has a crushing rate of 12.5% at 28 MPa and 7.1% at 21 MPa. Requirements for quartz sand proppant for fracturing, but do not meet the requirements for quartz sand proppant for fracturing of 28MPa and above. The turbidity of the finished product is 56FTU, the mud content is less than 0.01%, and the water content is 3.3%, so the operation of step 3 is not required.
[0075] Start the vertical shaft crusher with an impeller diameter of 600 mm and a rotational speed of 1900 rpm, and add 30 tons of the finished 40-70 mesh quartz sand proppant for fracturing produced in the above-mentioned Example 1 to the crusher evenly by using a belt conveyor At the feed port, the...
Embodiment 3
[0084] Production and processing of 100 tons of quartz sand granule raw materials purchased in Lu County, Sichuan.
[0085] The quartz sand is also the raw material used in glass production. It is the product of primary crushing, secondary crushing, and then cleaning of the ore mined in the quartz mining area.
[0086] Take a sample of 1000 grams and divide it into two parts of 500 grams each. One part is used for testing the mud content, particle size and water content of the quartz sand, and the other part is used for screening and breaking rate determination after indoor drying. After testing, the quartz sand particles contain 0.01% mud, the sieve residue is 0 if the particle size is larger than 1.2 mm, and the water content is 7.3%. Confirm that it can go directly to the vertical shaft crusher for production.
[0087]Another part of the quartz sand sample was dried, and then sieved by a standard sieving machine for testing to separate 130 grams of 40-70 mesh quartz sand a...
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