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Highly efficient production of hydrotalcite-like compounds from blast furnace slag
Abstract The resource utilization of blast furnace slag was the research hotspot at home and abroad. This study aimed to obtain hydrotalcite-like compounds from slag using co-precipitation method. The optimum process conditions for the synthesis of hydrotalcite-like compounds were investigated using single-factor in a self-designed laboratory-scale system. Furthermore, the synthesis mechanism of hydrotalcite-like compounds was established. The pH of 11.5, precipitation temperature of 343 K, crystallization temperature of 383 K, and crystallization duration of 6– 10 h were shown to be the optimum process conditions for the synthesis of hydrotalcite-like compounds. The leachate formed a typical crystal layered structure of hydrotalcite-like compounds under optimum process conditions through chemical reactions between compounds and sufficient crystallization. The completion of this work provided a new technological path for the utilization of blast furnace slag, which was more conducive to the energy saving and emission reduction of the iron and steel industry.
Graphical abstract Display Omitted
Highlights A novel resource utilization method of the blast furnace slag was proposed; Optimum process conditions for the synthesis of hydrotalcite-like compounds were derived; The synthesis mechanism of hydrotalcite-like compounds by using slag as raw material was established.
Highly efficient production of hydrotalcite-like compounds from blast furnace slag
Abstract The resource utilization of blast furnace slag was the research hotspot at home and abroad. This study aimed to obtain hydrotalcite-like compounds from slag using co-precipitation method. The optimum process conditions for the synthesis of hydrotalcite-like compounds were investigated using single-factor in a self-designed laboratory-scale system. Furthermore, the synthesis mechanism of hydrotalcite-like compounds was established. The pH of 11.5, precipitation temperature of 343 K, crystallization temperature of 383 K, and crystallization duration of 6– 10 h were shown to be the optimum process conditions for the synthesis of hydrotalcite-like compounds. The leachate formed a typical crystal layered structure of hydrotalcite-like compounds under optimum process conditions through chemical reactions between compounds and sufficient crystallization. The completion of this work provided a new technological path for the utilization of blast furnace slag, which was more conducive to the energy saving and emission reduction of the iron and steel industry.
Graphical abstract Display Omitted
Highlights A novel resource utilization method of the blast furnace slag was proposed; Optimum process conditions for the synthesis of hydrotalcite-like compounds were derived; The synthesis mechanism of hydrotalcite-like compounds by using slag as raw material was established.
Highly efficient production of hydrotalcite-like compounds from blast furnace slag
Duan, Wenjun (author) / Li, Guangjie (author) / Wang, Zhimei (author) / Wang, Diguang (author) / Yu, Qingbo (author) / Zhan, Yaquan (author)
Applied Clay Science ; 219
2022-01-30
Article (Journal)
Electronic Resource
English
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