He Di, Yao Mei, Wang Hongbin, Xie Binghua, Yu Qian, Geng Na, Jia Lijuan
School of Chemistry and Environment, Yunnan Minzu University, Kunming, Yunnan, 650500, People's Republic of China.
Environ Sci Pollut Res Int. 2022 Feb;29(7):9817-9825. doi: 10.1007/s11356-021-15731-3. Epub 2021 Sep 10.
A green and-easy to operate method, the microwave technology, was developed to promote the desulfurization process of phosphate rock, systematically investigates the strengthening effect of microwave, and uses XRD, BET, SEM, XRF, ICP, and EDS to characterize the reactants. The results show that the main reason for the desulfurization efficiency is improved by microwave heating under microwave conditions, different thermal stress phosphate rock materials lead to the destruction of each microstructure, and a specific surface area increased 40.25% phosphate rock. In addition, after microwave irradiation, the pore size of the phosphate rock at 2-5 nm is significantly increased, and the number of mesopores is significantly increased, thereby increasing the desulfurization efficiency of the phosphate rock. By investigating the effects of temperature, oxygen content, flow rate, and solid-liquid ratio on desulfurization efficiency, the paper concludes that the optimal conditions for desulfurization of phosphate rock after microwave irradiation are C(SO) is 2500 mg·m, temperature is 40 °C, φ(O) is 5%, solid-liquid ratio is 3.5 g:200 ml, and flue gas flow is 500 ml·min.
开发了一种绿色且易于操作的方法——微波技术，以促进磷矿的脱硫过程，系统地研究了微波的强化作用，并使用XRD、BET、SEM、XRF、ICP和EDS对反应物进行表征。结果表明，在微波条件下微波加热提高脱硫效率的主要原因是，不同热应力的磷矿材料导致各微观结构的破坏，磷矿的比表面积增加了40.25%。此外，微波辐照后，磷矿在2 - 5 nm的孔径显著增加，中孔数量显著增加，从而提高了磷矿的脱硫效率。通过研究温度、氧含量、流速和固液比对脱硫效率的影响，本文得出微波辐照后磷矿脱硫的最佳条件为：C(SO)为2500 mg·m，温度为40℃，φ(O)为5%，固液比为3.5 g:200 ml，烟气流量为500 ml·min。
