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Cemented backfill materials containing circulating fluidized bed incineration fly ash and its preparation method
The invention relates to a cementing backfill materials containing circulating fluidized bed incineration fly ash, which comprises a cementing material and iron tailings, wherein the mass ratio of the cementing material to the iron tailings is 1:4; The cementing material comprises the following raw materials in parts by weight: 20-90 parts of slag, 5-60 parts of circulating fluidized bed incineration fly ash and 6-15 parts of desulfurized gypsum. The cemented backfill materials can meet the high compressive strength (4 ~ 5 MPa) required for filling goaf, and can be used as mining backfill materials. The filling performance (rheology, fluidity and setting time) of the cemented backfill materials provided by the present invention is better than cement at the same ratio, which makes it a good substitute for cement. After long-term maintenance, the leaching concentration of heavy metal ions and soluble salts is lower than the underground Class III water quality standard. The cemented backfill materials makes use of materials such as circulating fluidized bed incineration fly ash and slag, which not only realizes the environmental protection purpose of treatment, but also reduces the cost of cemented filling mining technology, and realizes the win-win situation of treating with and green filling.
Cemented backfill materials containing circulating fluidized bed incineration fly ash and its preparation method
The invention relates to a cementing backfill materials containing circulating fluidized bed incineration fly ash, which comprises a cementing material and iron tailings, wherein the mass ratio of the cementing material to the iron tailings is 1:4; The cementing material comprises the following raw materials in parts by weight: 20-90 parts of slag, 5-60 parts of circulating fluidized bed incineration fly ash and 6-15 parts of desulfurized gypsum. The cemented backfill materials can meet the high compressive strength (4 ~ 5 MPa) required for filling goaf, and can be used as mining backfill materials. The filling performance (rheology, fluidity and setting time) of the cemented backfill materials provided by the present invention is better than cement at the same ratio, which makes it a good substitute for cement. After long-term maintenance, the leaching concentration of heavy metal ions and soluble salts is lower than the underground Class III water quality standard. The cemented backfill materials makes use of materials such as circulating fluidized bed incineration fly ash and slag, which not only realizes the environmental protection purpose of treatment, but also reduces the cost of cemented filling mining technology, and realizes the win-win situation of treating with and green filling.
Cemented backfill materials containing circulating fluidized bed incineration fly ash and its preparation method
ZHANG SIQI (author) / GAO WEI (author) / LI JIA (author) / NI WEN (author) / LI JIAJIE (author) / SHI TENGYU (author)
2021-08-26
Patent
Electronic Resource
English
Cemented filler containing fluidized bed waste incineration fly ash, and preparation method thereof
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