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| 1 | Characterization and recycling of nickel- and chromium-contained pickling sludge generated in production of stainless steel显示文摘Pickling sludge generated during the neutralization of pickling wastewater with calcium hydroxide in stainless steel pickling process was characterized using X-ray fluorescence spectrometry,X-ray diffractometry,scanning electron microscopy,thermogravimetry and differential scanning calorimetry,etc.The major compositions of pickling sludge are CaF2,CaSO4,Me(OH)n(M: Fe,Cr,Ni),and the content of CaF2 is high in the sludge.The melting point of pickling sludge is about 1350 °C and the viscosity is about 0.14 Pa·s at 1450 °C,which are comparatively lower than those of normal refining slag.After heat treatment,the contents of sulfur and fluorine in the pickling sludge were reduced,confirming the thermal decomposition of sulfate in the sludge.Fluorine in the sludge is reduced by the gaseous SiF4 and AlF3 generated through the reactions of CaF2 with SiO2 and Al2O3.The preliminary results from the reduction test indicate that the sulfur content in the steel is not affected by the presence of sulfur in the sludge.The recovery of nickel is about 40%,and the chromium content changes marginally due to the protective atmosphere under the reduction condition of chromic oxide.The pickling sludge is a potential auxiliary material for the production of stainless steel. | 李小明 谢庚 HOJAMBERDIEV Mirabbos 崔雅茹 赵俊学 | 2014 | Journal of Central South University2014，21，8： | 9 |
| 2 | 不锈钢酸洗污泥对烧结黏结相与平衡相的影响显示文摘不锈钢酸洗污泥安全填埋占用土地且难以消除对环境的危害,将酸洗污泥作为烧结配料使用有望回收其中铁、铬、镍等金属,并充分利用其中的熔剂组分,实现酸洗污泥在冶金企业的闭路资源化利用。铁矿粉配加酸洗污泥烧结黏结相强度试验表明,随着酸洗污泥配加比例的增加,黏结相强度先增加后减小,且随着碱度的增加整体减小,当酸洗污泥配加比例为10%时,试样中赤铁矿、磁铁矿质量分数最大,枪晶石质量分数较小,在碱度为1.5时于1 280℃焙烧4min,试样的黏结相强度最大可达15.12kN。平衡相烧结试验表明,配加酸洗污泥能改善烧结矿质量,铁矿粉配加10%的酸洗污泥,碱度为1.5,1 300℃烧结240min后,烧结矿的矿相组成和微观结构最好,综合性能最佳。 | 李小明 汪衍军 贾李锋 邢相栋 | 2019 | 钢铁2019，54，11： | 3 |
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