公开(公告)号：US20240091578A1

公开(公告)日：2024-03-21

申请号：US18462383

申请日：2023-09-06

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Botao QIN ,  Xu SHAO ,  Quanlin SHI ,  Yixuan YANG ,  Zujie MA ,  Wenjie JIANG ,  Hongqi YANG ,  Hongbiao SUN ,  Qingni MENG ,  Dejun WEI

IPC: A62D1/06

CPC classification number: A62D1/06

Abstract: A fly ash-based fire-prevention and extinguishing material with carbon dioxide mineralized and stored, and a preparation method thereof are provided. The preparation method includes: separately weighing 100 parts to 120 parts of water, 1 part to 3 parts of a solid strong alkali, and 20 parts to 40 parts of a fly ash as raw materials, pouring the raw materials into a reactor successively to obtain a resulting mixture, and stirring the resulting mixture at a high rotational speed; adding 10 parts to 20 parts of a solubilizing agent to the reactor, sealing the reactor, introducing carbon dioxide to the reactor at room temperature to maintain a carbon dioxide pressure to obtain a resulting slurry, and stirring the resulting slurry at a high rotational speed; and further introducing carbon dioxide into the reactor to increase the carbon dioxide pressure, and stirring the resulting slurry at a low rotational speed.

公开(公告)号：US20230167366A1

公开(公告)日：2023-06-01

申请号：US18071653

申请日：2022-11-30

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Botao QIN ,  Quanlin SHI ,  Mingyue HAO ,  Shuang ZHAO ,  Yizhen XU ,  Xu SHAO ,  Zujie MA

IPC: C09K21/10 ,  C09K21/02

CPC classification number: C09K21/10 ,  C09K21/02 ,  C10L10/00

Abstract: The present invention provides a fly ash-based environmentally-friendly hydrogel with a high water retention for preventing and controlling spontaneous combustion of coal in a mine and a preparation method thereof. The hydrogel includes the following raw materials in the following weight percentages: 10% to 30% of a gel-forming material A, 20% to 45% of a crosslinking material B, and water as a balance, where the gel-forming material A is prepared by physical blending of a biodegradable superabsorbent resin, anionic polyacrylamide, a sesbania gum, and fly ash in a weight ratio of (1-3):(0.5-1):(0.5-1):(95-98); and the crosslinking material B is prepared by subjecting zeolite, expandable graphite, and an aluminum citrate complex in a weight ratio of (60-78):(20-36):(2-4) to mixing, dispersing, adsorbing, and freeze-drying. The gel-forming material A is added to water and stirred at room temperature until homogeneous, and then the crosslinking material B is added and stirred until homogeneous to obtain the hydrogel. In the present disclosure, the environmentally-friendly hydrogel with the high water retention is prepared with wastes such as fly ash as a base material, and can be prepared simply with a low cost. In addition, the hydrogel has the advantages of degradability, strong water retention, and a controllable gelation time. The hydrogel can cover and wet a coal body for a long time, and prevent and control the spontaneous combustion of coal in a mine for a prolonged time.