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Sodium glucoheptylate can effectively chelate various heavy metal ions, and the heavy metal chelate is stable after the leaching solution is turned over and soaked, with strong anti-decomposition ability. After the stabilization treatment of sodium glucoheptylate, it has the characteristics of low energy consumption, convenient operation and small capacity increase. It transforms the toxic and harmful substances in fly ash into inorganic minerals or macromolecular chelates insoluble in water, making it become low-solubility, low-mobility and low-toxicity substances.