| 摘要: |
| 通过差示扫描量热分析法（TG-DSC）和物相分析研究RO相氧化焙烧特征，阐明RO相氧化焙烧产物的醋酸溶解性，并检验惰性矿物产品焙烧料的醋酸浸出效果. 结果表明：RO相氧化焙烧经历了保持原矿相、一次氧化反应和二次氧化反应3个阶段；一次氧化产物为Ⅰ型镁铁尖晶石，二次氧化产物为Ⅱ型镁铁尖晶石和方镁石，这2类镁铁尖晶石均具有醋酸不溶性；RO相氧化焙烧形成镁铁尖晶石后，可避免因醋酸溶液浸出所导致的全铁（TFe）损失；惰性矿物产品经中温或高温氧化焙烧后，因醋酸溶液浸出所导致的TFe质量损失率可降低98.2%. |
| 关键词: RO相 钢渣 镁铁尖晶石 氧化焙烧 醋酸溶液浸出 |
| DOI：10.3969/j.issn.1007-9629.2023.12.004 |
| 分类号:TU521.4 |
| 基金项目:陕西省重点研发计划项目（2019TSLGY05-04）；陕西省自然科学基础研究项目（2016JM5010） |
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| Oxidizing Roasting Characteristics of RO Phase and Solubility of Oxidation Products in Acetum |
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HOU Xinkai1, WU Meng1, WANG Xiangfeng1,2, TANG Yuyi1, ZHAN Hua1
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1.College of Materials Science and Engineering， Xi’an University of Architecture and Technology， Xi’an 710055， China;2.Iron and Steel Research Institute of Ansteel， Anshan 114009， China
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| Abstract: |
| Simultaneous thermogravimetry and differential scanning calorimetry analysis （TG-DSC） and physical phase analysis was conducted to study the characteristics of oxidizing roasting of RO phase. Solubility of the products of RO phase oxidizing roasting in acetum and the leaching effect of the inert mineral roasting material in acetum were investigated. The results show that the oxidizing roasting process can be divided in three stages： preservation of the original mineral phase， primary oxidation reaction， and secondary oxidation reaction. The primary oxidation products are type Ⅰ pleonaste， and the secondary oxidation products are type Ⅱ pleonaste and periclase. The two types of pleonaste are both insoluble in acetum. After RO phase oxidizing roasting to form pleonaste， total Fe（TFe） loss during acetum leaching can be avoided. After oxidizing roasting at medium or high temperature， the TFe mass loss rate of the inert mineral product reduced by 98.2% during acetum leaching. |
| Key words: RO phase steel slag pleonaste oxidizing roasting acetum leaching |
