Investigations on different starches as depressants for iron ore flotation.pdf

下载文档

10
0
约3.01万字
约 6页
2017-04-09 发布于江苏
举报
版权申诉
保障服务

Investigations on different starches as depressants for iron ore flotation.pdf

1、本文档共6页，可阅读全部内容。
2、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。
3、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。

Investigations on different starches as depressants for iron ore flotation

Minerals Engineering 49 (2013) 1–6Contents lists available at SciVerse ScienceDirect Minerals Engineering journal homepage: www.elsevier .com/locate /minengInvestigations on different starches as depressants for iron ore flotation0892-6875/$ - see front matter 2013 Elsevier Ltd. All rights reserved. /10.1016/j.mineng.2013.05.004 ? Corresponding author. E-mail address: bdas@immt.res.in (B. Das).Bhagyalaxmi Kar, Hrushikesh Sahoo, Swagat S. Rath, B. Das ? CSIR – Institute of Minerals and Materials Technology, Bhubaneswar 751 013, India a r t i c l e i n f o a b s t r a c tArticle history: Received 12 February 2013 Accepted 3 May 2013 Available online 24 May 2013 Keywords: Starch Depressant Flotation Surface charge Adsorption FTIRFour different starches, namely soluble starch, corn starch, potato starch and rice starch with different characteristics have been studied as depressants for hematite in cationic flotation using dodecylamine as the collector. Surface charge measurement and Fourier transform infrared spectroscopy (FTIR) have been used to understand the starch–hematite interaction. The lowering of surface charge and change of peaks at 750–1500 cm1 region indicate the presence of hydrogen bonding and chemical interaction between hematite and starches. The results of flotation studies with pure minerals of hematite and quartz and a low grade iron ore at different conditions suggest that all the starches are good depressants for hematite. Maximum adsorption for all the four starches with hematite occurs at the pH value 5–9. However soluble starch is found to be the better depressant at slightly alkaline pH. The flotation of nat- ural occurring banded iron ore using different starches has indicated that it is possible to achieve an iron grade of 63–65% Fe with 85–88% recovery. 2013 Elsevier Ltd. All rights reserved.1. Introduction Iron ore production and export play an important role in the economical development of India. In this context, Indian iron ore indus