Tossavainen M, Engstrom F, Yang Q, Menad N, Lidstrom Larsson M, Bjorkman B
Division of Mineral Processing, Luleå University of Technology, SE-971 87 Luleå, Sweden.
Waste Manag. 2007;27(10):1335-44. doi: 10.1016/j.wasman.2006.08.002. Epub 2006 Sep 26.
Four types of steel slags, a ladle slag, a BOF (basic oxygen furnace) slag and two different EAF (electric arc furnace) slags, were characterized and modified by semi-rapid cooling in crucibles and rapid cooling by water granulation. The aim of this work was to investigate the effect of different cooling conditions on the properties of glassy slags with respect to their leaching and volume stability. Optical microscopy, X-ray diffraction, scanning electron microscope and a standard test leaching (prEN 12457-2/3) have been used for the investigation. The results show that the disintegrated ladle slag was made volume stable by water granulation, which consisted of 98% glass. However EAF slag 1, EAF slag 2 and the BOF slag formed 17%, 1% and 1% glass, respectively. The leaching test showed that the glass-containing matrix did not prevent leaching of minor elements from the modified slags. The solubility of chromium, molybdenum and vanadium varied in the different modifications, probably due to their presence in different minerals and their different distributions.
对四种钢渣进行了表征和改性处理，这四种钢渣分别是钢包渣、碱性氧气转炉（BOF）渣以及两种不同的电弧炉（EAF）渣，采用在坩埚中半快速冷却和水淬快速冷却的方式。这项工作的目的是研究不同冷却条件对玻璃态钢渣的浸出性能和体积稳定性的影响。利用光学显微镜、X射线衍射、扫描电子显微镜以及标准浸出试验（prEN 12457-2/3）进行了研究。结果表明，水淬处理使破碎的钢包渣体积稳定，其玻璃含量为98%。然而，电弧炉渣1、电弧炉渣2和碱性氧气转炉渣的玻璃含量分别为17%、1%和1%。浸出试验表明，含玻璃的基体并不能阻止改性钢渣中微量元素的浸出。铬、钼和钒的溶解度在不同的改性处理中有所不同，这可能是由于它们存在于不同的矿物中且分布不同所致。
