School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China; State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China.
School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
J Hazard Mater. 2018 Sep 15;358:122-128. doi: 10.1016/j.jhazmat.2018.06.061. Epub 2018 Jun 28.
The pilot trial of detoxification of chromium slag in cyclone furnace and production of slag wool fibres were investigated in a power plant in China. 10-30 wt.% chromium slag was mixed with pulverized coal and 0-10 wt.% limestone as the raw materials of the cyclone furnace. Cr(VI) in chromium slag was reduced to CrO inside the cyclone furnace at high temperature. The melt was then produced into slag wool fibres through high-speed centrifugation. Optimal fibres with shot content of 4.5%, average diameter of 4.8 μm and acidity coefficient of 1.6 were produced with 15 wt.% chromium slag and 5 wt.% limestone in the mixture. Leaching toxicity test showed Cr(VI) of 0.016 mg/L of the produced fibres, which is far below the national standard of China. The total energy consumption could be significantly decreased compared to traditional cupola furnace method. This technique provides an effective and comprehensive technique for the detoxification and utilization of chromium slag at low cost and large-scale.
在中国的一家电厂，对旋风炉解毒铬渣并生产矿渣棉纤维的中试进行了研究。将 10-30wt%的铬渣与煤粉和 0-10wt%的石灰石混合作为旋风炉的原料。铬渣中的六价铬在旋风炉内的高温下被还原为 CrO。然后，通过高速离心将熔体制成矿渣棉纤维。在混合物中使用 15wt%的铬渣和 5wt%的石灰石，可以生产出含碎料量为 4.5%、平均直径为 4.8μm 和酸度系数为 1.6 的最佳纤维。浸出毒性试验表明，所生产纤维的 Cr(VI)为 0.016mg/L，远低于中国国家标准。与传统的冲天炉方法相比，总能耗可显著降低。该技术为低成本、大规模解毒和利用铬渣提供了一种有效且全面的技术。
