Pit backfill casting stone made from fly ash, steel slag and coal gangue

• Main Authors: SU XIANGDONG, GAO HONG, RUAN ZHENGLIN, LIU ZHAO, ZHAO GAOHUA, ZOU JIANMING, WEI CHANGCHUN
• Format: Patent
• Language: Chinese; English
• Published: 28.11.2012
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF NATURAL STONE

The invention discloses a pit backfill casting stone made from fly ash, steel slag and coal gangue, and is characterized in that the casting stone prepared by fly ash, steel slag, coal gangue powder, lime, gypsum powder and a blowing agent. Directed at a plurality of mine holes and geological instability in coal mine and mining and metallurgy areas, and problems of a lot of tailings and wastes such as fly ash, coal gangue, steel slag and the like left behind, the invention proposes a casting stone proportioning scheme. Various raw materials are processed into powder and turned into slurry which is then injected into the mine holes and culverts for condensation, and can slowly generate a hydraulic cementing material mainly composed of calcium silicate, aluminate and iron aluminate. By the blowing agent, the casting stone can expand to fill the space which is not injected with the casting stone, and will not pollute the groundwater layer and soil texture at the same time.