Effect of modified starches on depression of diaspore

Four modified starches with selected charge characteristics including cationic starch （CAS）, carboxymethyl starch （CMS）, amphoteric starch （AMS） and soluble starch （SS） were investigated as depressants for diaspore in reverse flotation test using cationic collector （dodecylamine）. Adsorption examina...

Full description

Saved in:
Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2010-08, Vol.20 (8), p.1494-1499
Main Author: 李海普 张莎莎 蒋昊 李彬
Format: Article
Language:English
Subjects:
Accumulators
Adsorption
Cationic
Collectors
depressant
Depression
Diaspore
reverse flotation
starch
Starches
Surface chemistry
傅里叶变换红外光谱
吸附行为
抑郁症
改性淀粉
表面电荷特性
阳离子淀粉
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Four modified starches with selected charge characteristics including cationic starch （CAS）, carboxymethyl starch （CMS）, amphoteric starch （AMS） and soluble starch （SS） were investigated as depressants for diaspore in reverse flotation test using cationic collector （dodecylamine）. Adsorption examination, Zeta potential measurement and Fourier transform infrared （FTIR） spectroscopy were used to clarify the role of the surface charge characteristics of starches in determining the adsorption behavior and depression performance as well as the mineral-starch interaction. Results show that the positively charged starches （CAS and AMS） display higher adsorption amounts and also better depression performance compared with the non-ionic （SS） and anionic starch （CMS）, benefiting from the favorable electrostatic attraction with diaspore and also electrostatic repulsion with collector. FTIR spectroscopy proves the presence of hydrogen bonds and chemical complexation between mineral and starches in an integrated manner.
ISSN:1003-6326
DOI:10.1016/S1003-6326(09)60327-7