Patent ID: 11898099
Assignee: LIAONING HUAYE ENERGY TECHNOLOGY SERVICE CO., LTD.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  Y | IPC C

Claim 6:
7. A preparation method of a fracturing propping agent according to claim 1, the preparation method comprising the following steps:
(1) drying dry sludge until the content of free water is 0.01-1%;
(2) mixing the dried dry sludge with the remaining raw materials to obtain a mixture, and grinding the obtained mixture until residue on a 425-mesh sieve is <1%, so as to obtain mixed micro powders;
(3) pelletizing water and the mixed micro powders, to prepare microspheres, and then drying the microspheres until the content of free water is 0.01-1%, so as to obtain dried microspheres; and
(4) calcining the dried microspheres and performing heat maintenance to obtain a calcined material, and then crushing, grading and inspecting the calcined material to obtain the fracturing propping agent.