Flotation of lignite pretreated by sorbitan monooleate
Flotation of lignite pretreated by sorbitan monooleate
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DOI：
10.5277/ppmp140227
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发表时间：
2014-01
影响因子：
1.5
通讯作者：
Wenjun Zhang;Xiao-lin Tang
中科院分区：
文献类型：
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作者：
Wenjun Zhang;Xiao-lin Tang
在这项研究中，脱水山梨糖醇单油酸酯用于在浮选试验之前对褐煤进行预处理。首先，将褐煤样品和水与0%、0.5%、1%、1.5%和2%（以煤的重量计）的失水山梨糖醇单油酸酯混合，生产五种类型的浮选矿浆。采用 FTIR、XPS 和 SEM 分析褐煤样品的表面性质。浮选试验用于表明脱水山梨糖醇单油酸酯预处理后褐煤浮选的改善。 FTIR和XPS结果表明，褐煤中存在许多羧基、羟基等含氧官能团。此外，SEM结果显示褐煤表面存在许多孔洞。这些孔将被浮选矿浆中的水填充。浮选结果表明，低浓度脱水山梨醇单油酸酯可以改善褐煤的浮选效果。然而，在脱水山梨糖醇单油酸酯浓度较高时，褐煤的浮选行为会恶化。
In this study, sorbitan monooleate was used to pretreat lignite prior to flotation tests. First, the lignite sample and water were mixed with 0%, 0.5%, 1%, 1.5% and 2% (on the basis of the weight of the coal) of sorbitan monooleate to produce five types of flotation slurries. FTIR, XPS and SEM were used to analyze the surface properties of the lignite sample. The flotation tests were used to indicate the improvements in flotation of lignite after the sorbitan monooleate pre-treatment. FTIR and XPS results showed that there are many oxygenated functional groups in lignite such as carboxyl group and hydroxyl groups. Furthermore, SEM results showed that there are many holes on the lignite surface. These holes will be filled with water in the flotation pulp. The flotation results indicated that sorbitan monooleate can improve the lignite flotation at low concentrations of sorbitan monooleate. However, the flotation behavior of lignite deteriorated at higher concentrations of sorbitan monooleate.