Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Gelling agent for curing heavy metal ions in tailings and use method thereof
The invention discloses a gelling agent for solidifying heavy metal ions in tailings and a use method of the gelling agent. The gelling agent is prepared from the following raw materials in percentage by mass: 0.25-0.7% of a chelating trapping agent, 0.15-0.3% of a chelating accelerant, 0.2-0.6% of a complexing early strength agent, 1-7% of lime, 0-10% of cement, 8-20% of gypsum, 0-20% of steel slag micro powder and 50-82% of slag micro powder. The chelating trapping agent, the chelating accelerant and the complexing early strength agent are uniformly mixed, and then are uniformly mixed with other components. The gelling agent prepared by the invention not only can be used for cementing full tailings through hydration reaction to realize filling mining, but also can be used for synergistically curing heavy metal ions in the tailings through various effects of leaching, chelating, wrapping, chemical adsorption, chemical passivation, ion substitution and the like to keep the curing stability for a long time, and is especially suitable for cementing filling of full tailings with high heavy metal ion content, and the environmental risk of high content of heavy metal ions in the filling body after tailing filling is obviously reduced.
本发明公开了一种用于固化尾矿中重金属离子的胶凝剂及其使用方法，原料中各组份的质量百分含量为：螯合捕捉剂0.25～0.7％，螯合促进剂0.15～0.3％，络合早强剂0.2～0.6％，石灰1～7％，水泥0～10％，石膏8～20％，钢渣微粉0～20％，矿渣微粉50～82％。先将螯合捕捉剂螯合促进剂络合早强剂混合均匀，再与其它组份混合均匀。本发明制备的胶凝剂不仅通过水化反应胶结全尾矿，实现充填开采，还通过浸出、螯合、包裹、化学吸附、化学钝化和离子替代等多种作用协同固化尾矿中重金属离子，长期保持固化的稳定性，特别适用于重金属离子含量高的全尾矿胶结充填，显著降低尾矿充填后充填体重金属离子含量高的环境风险。
Gelling agent for curing heavy metal ions in tailings and use method thereof
The invention discloses a gelling agent for solidifying heavy metal ions in tailings and a use method of the gelling agent. The gelling agent is prepared from the following raw materials in percentage by mass: 0.25-0.7% of a chelating trapping agent, 0.15-0.3% of a chelating accelerant, 0.2-0.6% of a complexing early strength agent, 1-7% of lime, 0-10% of cement, 8-20% of gypsum, 0-20% of steel slag micro powder and 50-82% of slag micro powder. The chelating trapping agent, the chelating accelerant and the complexing early strength agent are uniformly mixed, and then are uniformly mixed with other components. The gelling agent prepared by the invention not only can be used for cementing full tailings through hydration reaction to realize filling mining, but also can be used for synergistically curing heavy metal ions in the tailings through various effects of leaching, chelating, wrapping, chemical adsorption, chemical passivation, ion substitution and the like to keep the curing stability for a long time, and is especially suitable for cementing filling of full tailings with high heavy metal ion content, and the environmental risk of high content of heavy metal ions in the filling body after tailing filling is obviously reduced.
本发明公开了一种用于固化尾矿中重金属离子的胶凝剂及其使用方法，原料中各组份的质量百分含量为：螯合捕捉剂0.25～0.7％，螯合促进剂0.15～0.3％，络合早强剂0.2～0.6％，石灰1～7％，水泥0～10％，石膏8～20％，钢渣微粉0～20％，矿渣微粉50～82％。先将螯合捕捉剂螯合促进剂络合早强剂混合均匀，再与其它组份混合均匀。本发明制备的胶凝剂不仅通过水化反应胶结全尾矿，实现充填开采，还通过浸出、螯合、包裹、化学吸附、化学钝化和离子替代等多种作用协同固化尾矿中重金属离子，长期保持固化的稳定性，特别适用于重金属离子含量高的全尾矿胶结充填，显著降低尾矿充填后充填体重金属离子含量高的环境风险。
Gelling agent for curing heavy metal ions in tailings and use method thereof
一种用于固化尾矿中重金属离子的胶凝剂及其使用方法
YANG XIAOJUN (Autor:in) / XU XIUPING (Autor:in) / HUA SHAOGUANG (Autor:in) / LIU LONG (Autor:in) / YU XIANKUN (Autor:in)
28.05.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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