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A platform for research: civil engineering, architecture and urbanism
Method for reducing methylene blue value of silt-containing tailing micropowder
The invention relates to the technical field of concrete admixtures, and particularly discloses a method for reducing the methylene blue value of silt-containing tailing micropowder. The method comprises the following steps: roasting mud-containing tailing micro-powder with the methylene blue value of greater than or equal to 6g/kg at 550-750 DEG C to obtain tailing micro-powder with the methylene blue value of less than 6g/kg; the mud-containing tailing micro powder contains clay minerals. According to the method, the tailing micro powder with the methylene blue value meeting the requirement can be obtained only by roasting the mud-containing tailing micro powder at the specific temperature, operation is easy and convenient to implement, the problem that the methylene blue value of the mud-containing tailing micro powder exceeds the standard is fundamentally solved, the utilization rate of the mud-containing tailing micro powder is increased, and energy conservation and environment protection are achieved. The characteristics that the structure is changed and molecules tend to be stable due to the fact that the clay minerals absorb heat under the high-temperature condition are utilized, adsorption of the clay minerals to cationic quaternary ammonium salt ion groups in a methylene blue solution is effectively reduced, and therefore the methylene blue value of the mud-containing tailing micro powder is reduced, and the fluidity of the concrete admixture is improved.
本发明涉及混凝土掺合料技术领域，具体公开一种降低含泥尾矿微粉亚甲蓝值的方法。本发明将亚甲蓝值≥6g/kg的含泥尾矿微粉于550～750℃焙烧，得亚甲蓝值＜6g/kg的尾矿微粉；所述含泥尾矿微粉中含有黏土矿物。本发明只需要将含泥尾矿微粉在特定温度下进行焙烧，即可得亚甲蓝值复合要求的尾矿微粉，操作简便易行，从根本上解决了含泥尾矿微粉亚甲蓝值超标的问题，提高了含泥尾矿微粉的利用率，且节能环保。本发明利用黏土矿物在高温条件下吸热导致结构改变，分子趋于稳定的特征，有效降低了黏土矿物对亚甲蓝溶液中“阳离子型”季胺盐离子基团的吸附，从而降低了含泥尾矿微粉的亚甲蓝值，改善了混凝土掺合料的流动度。
Method for reducing methylene blue value of silt-containing tailing micropowder
The invention relates to the technical field of concrete admixtures, and particularly discloses a method for reducing the methylene blue value of silt-containing tailing micropowder. The method comprises the following steps: roasting mud-containing tailing micro-powder with the methylene blue value of greater than or equal to 6g/kg at 550-750 DEG C to obtain tailing micro-powder with the methylene blue value of less than 6g/kg; the mud-containing tailing micro powder contains clay minerals. According to the method, the tailing micro powder with the methylene blue value meeting the requirement can be obtained only by roasting the mud-containing tailing micro powder at the specific temperature, operation is easy and convenient to implement, the problem that the methylene blue value of the mud-containing tailing micro powder exceeds the standard is fundamentally solved, the utilization rate of the mud-containing tailing micro powder is increased, and energy conservation and environment protection are achieved. The characteristics that the structure is changed and molecules tend to be stable due to the fact that the clay minerals absorb heat under the high-temperature condition are utilized, adsorption of the clay minerals to cationic quaternary ammonium salt ion groups in a methylene blue solution is effectively reduced, and therefore the methylene blue value of the mud-containing tailing micro powder is reduced, and the fluidity of the concrete admixture is improved.
本发明涉及混凝土掺合料技术领域，具体公开一种降低含泥尾矿微粉亚甲蓝值的方法。本发明将亚甲蓝值≥6g/kg的含泥尾矿微粉于550～750℃焙烧，得亚甲蓝值＜6g/kg的尾矿微粉；所述含泥尾矿微粉中含有黏土矿物。本发明只需要将含泥尾矿微粉在特定温度下进行焙烧，即可得亚甲蓝值复合要求的尾矿微粉，操作简便易行，从根本上解决了含泥尾矿微粉亚甲蓝值超标的问题，提高了含泥尾矿微粉的利用率，且节能环保。本发明利用黏土矿物在高温条件下吸热导致结构改变，分子趋于稳定的特征，有效降低了黏土矿物对亚甲蓝溶液中“阳离子型”季胺盐离子基团的吸附，从而降低了含泥尾矿微粉的亚甲蓝值，改善了混凝土掺合料的流动度。
Method for reducing methylene blue value of silt-containing tailing micropowder
一种降低含泥尾矿微粉亚甲蓝值的方法
ZHANG FANFAN (author) / WU SHENGHUA (author) / CHEN MEIZHAO (author) / ZHENG TONGLIN (author) / LI WENJUAN (author)
2024-02-06
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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