用熔剂合金化技术从含钛高炉渣和金刚石线锯硅废料中回收钛和硅。
Recycling of Ti and Si from Ti-bearing blast furnace slag and diamond wire saw silicon waste by flux alloying technique.
机构信息
. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China.
. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China; . National Engineering Research Center of Vacuum Metallurgy, Kunming University of Science and Technology, Kunming, 650093, China.
出版信息
J Environ Manage. 2024 Jun;362:121302. doi: 10.1016/j.jenvman.2024.121302. Epub 2024 Jun 1.
Two industrial solid wastes, Ti-bearing blast furnace slag (TBFS) and diamond wire saw silicon waste (DWSSW), contain large amounts of Ti and Si, and their accumulation wastes resources and intensifies environmental pollution. In the present study, DWSSW was used as the silicon source to reduce titanium oxide in TBFS by electromagnetic induction smelting, and meanwhile NaAlF was added as a flux to improve the recycling of the wastes. Ti and Si of the two wastes were simultaneously recovered in the form of alloy. The effects of different addition amount of NaAlF flux in the mixture of DWSSW and TBFS on chemical composition, viscosity, basicity and structure of slag were investigated. The dissolution behavior of SiO in NaAlF flux was theoretically deduced and experimentally verification. The optimized recovery rate of Ti and Si were obtained, and the research realizes the efficient recycling of DWSSW and TBFS simultaneously.
两种工业固体废物，含钛高炉渣（TBFS）和金刚石线锯硅废料（DWSSW），含有大量的 Ti 和 Si，其堆积浪费资源并加剧环境污染。在本研究中，DWSSW 被用作硅源，通过电磁感应熔炼还原 TBFS 中的氧化钛，同时添加 NaAlF 作为助熔剂以提高废物的回收利用率。两种废物中的 Ti 和 Si 以合金的形式同时回收。研究了 DWSSW 和 TBFS 混合物中不同 NaAlF 助熔剂添加量对渣化学成分、粘度、碱度和结构的影响。从理论上推导了 SiO 在 NaAlF 助熔剂中的溶解行为，并进行了实验验证。得到了 Ti 和 Si 的最佳回收率，实现了 DWSSW 和 TBFS 的高效回收。
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