Evaporation of Phosphorus from FeO-CaO-SiO2-P2O5 Synthesized Steelmaking Slag by Carbothermic Reduction
Evaporation of Phosphorus from FeO-CaO-SiO2-P2O5 Synthesized Steelmaking Slag by Carbothermic Reduction
复制标题
FeO-CaO-SiO2-P2O5合成炼钢渣碳热还原蒸发磷
DOI：
10.1007/978-3-031-22765-3_2
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Nagasaka Tetsuya
中科院分区：
文献类型：
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作者：
Yu Huafang;Takahiro Miki;Sasaki Yasushi;Nagasaka Tetsuya
磷是农业和工业部门的重要元素，特别是在半导体和制药行业。然而，我国磷资源和高品位磷矿资源正在迅速枯竭，寻找磷的二次资源变得越来越重要。炼钢炉渣是一种具有吸引力的磷二次资源，因为它含有相对高的磷含量，并且具有恒定的供应、相对固定的组成和轻微的污染。采用石墨粉作为还原剂，将FeO-CaO-SiO2-P2 O 5合成渣还原为磷。在本研究中，阐明了在1573 K下，碳热还原可以从钢渣中蒸发磷。在合成渣碳热还原过程中，磷主要分布在气相、金属相中，并有部分残留在渣相中。转移到气相中的部分磷可以回收。
Phosphorus is an important element for both the agricultural and industrial sectors, especially within semiconductor and pharmaceutical industries. However, the resource of phosphorus, and high grade phosphate rock deposits are rapidly being depleted and finding phosphorus secondary resources turns to be more and more crucial. Steelmaking slag is considered an attractive phosphorus secondary resource as it contains relatively high phosphorus content and has a constant supply, relatively fixed composition with minor contamination. The present study used graphite powder as a reducing agent to reduce FeO-CaO-SiO2-P2O5synthesized slag into phosphorus. And in this study, it was clarified that phosphorus could be evaporated from steelmaking slag by carbothermic reduction at 1573 K. During the carbothermic reduction process of synthesized slag, phosphorus was detected to be distributed into gas phase, metal phase, and part of it kept in residual slag phase. And partial phosphorus transferred into the gas phase could be recovered.