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Improving the Floatability and Cleanability of Ultrafine Coal by the Use of Anionic Surfactants. II. Effectiveness of Surfactant/Alcohol Mixtures on Bituminous Coals

 

作者: RICHARDB. READ,   CALY. MEYERS,   LARRYR. CAMP,   MICHAELS. SUMMERS,  

 

期刊: Coal Preparation  (Taylor Available online 1989)
卷期: Volume 7, issue 1-2  

页码: 101-114

 

ISSN:0734-9343

 

年代: 1989

 

DOI:10.1080/07349348908960545

 

出版商: Taylor & Francis Group

 

关键词: floatability;cleanability;ultrafine coal;surfactant/alcohol mixtures;pyritic sulfur;ash

 

数据来源: Taylor

 

摘要:

Improvement in the floatability and cleanability of ultrafine, lower rank bituminous coals - removal of pyritic sulfur and ash - has been achieved by employing mixtures composed of anionic surfactants and conventional frothing alcohols. In particular, of those surfactants studied, the lower molecular weightcis-dialkylethenesulfonate salts afforded the greatest improvement. Roughly half as much alcohol/surfactant mixture as conventional alcohol/kerosene blends produced equivalent energy recoveries. Ratios of surfactant to alcohol must be properly balanced to maximize ash and pyrite rejections. Such mixtures were also beneficial for floating and cleaning higher rank bituminous coals and for use in conventional fine size froth flotation feed.

 

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