کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
235046 465627 2016 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of flotation froth properties on froth rheology
ترجمه فارسی عنوان
اثر خواص فوم شناور بر روی ریخت شناسی
کلمات کلیدی
سرچشمه ی سرزمین، اندازه حباب، کمپلکس لاملا پوشش داده شده توسط مواد جامد، شناور
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• A method of calculating froth properties was developed.
• An approach of evaluating the non-Newtonian rheology of flotation froth was developed.
• The significance of froth properties on froth rheology was investigated.
• A model of froth rheology related to froth properties was proposed.

Froth flotation is a widely used process of particle separation exploiting differences in surface properties. The froth performance in a flotation cell is expected to be affected by the froth rheology, as it affects the froth residence time that determines the probability of recovery of valuable minerals in the froth phase. Flotation froths have a similar structure to the gas–liquid foams whose rheology has been widely studied. However, to date, very little work has been done in the rheology of flotation froths owing to their instability and the presence of solid particles (on bubble surfaces and in the plateau borders) that are believed to influence froth rheology and complicate any investigation. In this paper, the effects of froth properties on froth rheology were studied by examining the results of 33 flotation tests performed under various conditions that resulted in changes in the froth properties and, consequently, the froth rheology. The experiments were performed in a 20 L continuous flotation cell. It was found that the bubble size and the fraction of lamellae covered by solids defined the froth rheology, while the presence of particles in the plateau borders contributed very little to the froth rheology. A model structure was developed by taking into account froth properties to predict froth viscosity.

This figure shows the froth rheograms determined for various tests.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Powder Technology - Volume 294, June 2016, Pages 55–65
نویسندگان
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