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含钒钢渣低温钠化焙烧钒浸出效果及其焙砂湿法脱硫作用

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王洁, 刘树根, 宁平, 谢容生. 含钒钢渣低温钠化焙烧钒浸出效果及其焙砂湿法脱硫作用[J]. 环境工程学报, 2018, 12(11): 3124-3130. doi: 10.12030/j.cjee.201804071
引用本文: 王洁, 刘树根, 宁平, 谢容生. 含钒钢渣低温钠化焙烧钒浸出效果及其焙砂湿法脱硫作用[J]. 环境工程学报, 2018, 12(11): 3124-3130. doi: 10.12030/j.cjee.201804071
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WANG Jie, LIU Shugen, NING Ping, XIE Rongsheng. Sodium salt roasting of vanadium-containing steel slag at low temperature and application of vanadium calcine for wet desulfurization[J]. Chinese Journal of Environmental Engineering, 2018, 12(11): 3124-3130. doi: 10.12030/j.cjee.201804071
Citation: WANG Jie, LIU Shugen, NING Ping, XIE Rongsheng. Sodium salt roasting of vanadium-containing steel slag at low temperature and application of vanadium calcine for wet desulfurization[J]. Chinese Journal of Environmental Engineering, 2018, 12(11): 3124-3130. doi: 10.12030/j.cjee.201804071
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含钒钢渣低温钠化焙烧钒浸出效果及其焙砂湿法脱硫作用

  • 1.

    昆明理工大学环境科学与工程学院，昆明 650500

  • 2.

    共伴生有色金属资源加压湿法冶金技术国家重点实验室，昆明 650503

  • 基金项目:

    共伴生有色金属资源加压湿法冶金技术国家重点实验室开放基金资助项目（yy2016004）

    昆明理工大学分析测试基金资助项目（2017M20162207026）

Sodium salt roasting of vanadium-containing steel slag at low temperature and application of vanadium calcine for wet desulfurization

  • 1.

    Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China

  • 2.

    State Key Laboratory of Pressure Hydrometallurgical Technology of Associated Nonferrous Metal Resources, Kunming 650503, China

  • Fund Project:

  • 摘要: 含钒钢渣钠化焙烧过程中添加CaF2等助剂以降低提钒工艺的能耗，分析了不同因素对低温钠化焙烧后钒浸出效果的影响，并将含钒钢渣焙砂配制成吸收浆液以净化烟气中的SO2。在浸出钒实现其资源化利用的同时，也探索出一种高效烟气脱硫的新方法。添加3.0% CaF2作为助剂，温度为700 ℃、焙烧时间为1 h的条件下，所得焙砂中钒浸出率可达68.1%。X射线衍射（XRD）与热重（TG）分析表明，混合物料中添加CaF2助剂能促进焙烧过程物相的改变，白云母、钛铁矿等衍射峰明显减弱，含钒钢渣混合料在700 ℃条件下便呈现明显的热失重，在较低温度条件下即可实现钠化焙烧。以此含钒焙砂配制脱硫吸收浆液，脱硫率不低于95%的穿透时间可达125 min，而同样条件下磷矿浆脱硫系统仅为35 min。
    Abstract: In this study, CaF2 or other additives were added to the mixture containing vanadium steel slag for energy consumption reduction during vanadium extraction process. The effects of technical parameters on vanadium leaching, as well as the vanadium calcine used as absorption slurry to purify sulfur dioxide in flue gas, were investigated. The results show that vanadium recovery could be successfully achieved, and an innovative approach for efficient flue gas desulfurization was also found. At CaF2 addition ratio of 3.0%, the roasting temperature of 700 ℃ and retention time of 1 h, the leaching rate of vanadium could reach 68.1%. Based on the analysis of X-ray diffraction (XRD) and thermogravimetry (TG), the additive CaF2 was in favor of the mineral phase change during roasting process, which led to the significant weakening on the diffraction peaks of muscovite and ilmenite. Thus, a remarkable heat loss occurred for the mixing system at the TG temperature of 700 ℃, then sodium salt roasting of vanadium-containing steel slag could be achieved at a relatively low temperature. The vanadium calcine was used as a kind of wet desulfurization agent, and the breakthrough time reached 125 minutes as desulfurization efficiency was not less than 95%, however, it was only 35 minutes for the desulfurization system with phosphate ore slurry.
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  • 刊出日期:  2018-11-12

含钒钢渣低温钠化焙烧钒浸出效果及其焙砂湿法脱硫作用

  • 1. 昆明理工大学环境科学与工程学院，昆明 650500
  • 2. 共伴生有色金属资源加压湿法冶金技术国家重点实验室，昆明 650503
基金项目:

共伴生有色金属资源加压湿法冶金技术国家重点实验室开放基金资助项目（yy2016004）

昆明理工大学分析测试基金资助项目（2017M20162207026）

摘要: 含钒钢渣钠化焙烧过程中添加CaF2等助剂以降低提钒工艺的能耗，分析了不同因素对低温钠化焙烧后钒浸出效果的影响，并将含钒钢渣焙砂配制成吸收浆液以净化烟气中的SO2。在浸出钒实现其资源化利用的同时，也探索出一种高效烟气脱硫的新方法。添加3.0% CaF2作为助剂，温度为700 ℃、焙烧时间为1 h的条件下，所得焙砂中钒浸出率可达68.1%。X射线衍射（XRD）与热重（TG）分析表明，混合物料中添加CaF2助剂能促进焙烧过程物相的改变，白云母、钛铁矿等衍射峰明显减弱，含钒钢渣混合料在700 ℃条件下便呈现明显的热失重，在较低温度条件下即可实现钠化焙烧。以此含钒焙砂配制脱硫吸收浆液，脱硫率不低于95%的穿透时间可达125 min，而同样条件下磷矿浆脱硫系统仅为35 min。

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