Effect of sodium chloride on fine coal flotation and discussion based on froth stability and particle coagulation

Q1 Earth and Planetary Sciences

International Journal of Mineral Processing Pub Date : 2017-12-10 DOI:10.1016/j.minpro.2017.10.008

Guosheng Li , Lijun Deng , Yijun Cao , Bo Wang , Jincai Ran , Haijun Zhang

{"title":"Effect of sodium chloride on fine coal flotation and discussion based on froth stability and particle coagulation","authors":"Guosheng Li , Lijun Deng , Yijun Cao , Bo Wang , Jincai Ran , Haijun Zhang","doi":"10.1016/j.minpro.2017.10.008","DOIUrl":null,"url":null,"abstract":"<div><p><span>In this study, the effect of sodium chloride on the flotation of a fine coal sample was investigated. The results indicated that flotation of coal was highly dependent on changes in sodium chloride concentration. An increase in the sodium chloride concentration resulted in increases in the combustible recovery as well as concentrate ash content. The froth stability and </span>particle size distribution<span> in the slurries with different sodium chloride concentrations were measured. The results showed that the increase in froth stability and enlargement in particle size were both favorable for the recovery of coal particles in flotation. The underlying mechanism was investigated by examining the zeta potential of pure coal particles and pulp rheology. The pulp rheology measurements clearly indicated that changes in froth stability were attributed to changes in slurry viscosity, which ultimately enhanced the recovery of coal particles. The decrease in zeta potential was responsible for the increase in particle size in slurries due to particle coagulation, which is caused by a decrease in electrostatic repulsion among the particles.</span></p></div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2017-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.10.008","citationCount":"24","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Mineral Processing","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S030175161730220X","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Earth and Planetary Sciences","Score":null,"Total":0}

引用次数: 24

Abstract

In this study, the effect of sodium chloride on the flotation of a fine coal sample was investigated. The results indicated that flotation of coal was highly dependent on changes in sodium chloride concentration. An increase in the sodium chloride concentration resulted in increases in the combustible recovery as well as concentrate ash content. The froth stability and particle size distribution in the slurries with different sodium chloride concentrations were measured. The results showed that the increase in froth stability and enlargement in particle size were both favorable for the recovery of coal particles in flotation. The underlying mechanism was investigated by examining the zeta potential of pure coal particles and pulp rheology. The pulp rheology measurements clearly indicated that changes in froth stability were attributed to changes in slurry viscosity, which ultimately enhanced the recovery of coal particles. The decrease in zeta potential was responsible for the increase in particle size in slurries due to particle coagulation, which is caused by a decrease in electrostatic repulsion among the particles.

查看原文本刊更多论文

氯化钠对细粒煤浮选的影响及基于泡沫稳定性和颗粒混凝的探讨

研究了氯化钠对某细粒煤浮选的影响。结果表明，煤的浮选高度依赖于氯化钠浓度的变化。氯化钠浓度的增加导致可燃回收率和精矿灰分含量的增加。测定了不同氯化钠浓度的浆料的泡沫稳定性和粒径分布。结果表明，泡沫稳定性的提高和颗粒尺寸的增大都有利于浮选中煤颗粒的回收。通过考察纯煤颗粒的zeta电位和矿浆流变学，探讨了其潜在的机理。浆体流变学测量清楚地表明，泡沫稳定性的变化归因于浆体粘度的变化，最终提高了煤颗粒的回收率。zeta电位的减小是浆料中颗粒大小增大的原因，这是由于颗粒间静电斥力的减少而引起的颗粒凝聚。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

International Journal of Mineral Processing 工程技术-工程：化工

CiteScore

3.02

自引率

0.00%

发文量

审稿时长

11.1 months

期刊介绍： International Journal of Mineral Processing has been discontinued as of the end of 2017, due to the merger with Minerals Engineering. The International Journal of Mineral Processing covers aspects of the processing of mineral resources such as: Metallic and non-metallic ores, coals, and secondary resources. Topics dealt with include: Geometallurgy, comminution, sizing, classification (in air and water), gravity concentration, flotation, electric and magnetic separation, thickening, filtering, drying, and (bio)hydrometallurgy (when applied to low-grade raw materials), control and automation, waste treatment and disposal. In addition to research papers, the journal publishes review articles, technical notes, and letters to the editor..