摘要
研究了捕收剂油酸、羟肟酸、十二烷胺双甲基膦酸 ,抑制剂氟硅酸钠、水玻璃对改性渣中钙钛矿浮选的影响。通过浮选溶液化学计算、矿物动电电位、红外光谱等研究 ,探讨了羟肟酸在钙钛矿表面的作用和水玻璃抑制钛辉石的作用机理。结果表明 :以羟肟酸为捕收剂 ,水玻璃为抑制剂可实现钙钛矿与钛辉石等的浮选分离。钙钛矿和钛辉石晶体表面的Ca,Ti质点密度不同 ,所处的位置及活性不同 ,造成二者浮游性有一定的差异 ;钙钛矿在整个研究范围内 ζ电位始终为负值 ,但在阴离子捕收剂C5-9羟肟酸中可浮性良好 ,表明C5-9羟肟酸在钙钛矿表面发生了化学吸附。红外光谱研究证实 ,C5-9羟肟酸的CN ,N—O官能团与钙钛矿表面的钛质点发生了化学键合。
The effects of sodium oleate, hydroxamate, dodecyl amido methyl phosphonic acid, sodium fluosilicate, and sodium silicate on the flotation of perovskite in treated slag have been studied, and the experiments show that perovskite can be effectively separated from rich titanium diopside, titanaugite, and spinel in weak acid pulp, with hydroxamate as collector, sodium silicate as depressant, and sulphuric acid as regulator. The chemical mechanism of flotation reagent on the mineral surface has been tested by the chemical solution calculation, zeta potential and infrared spectrum. There are three major findings: 1) the distributing density of Ca and Ti particles on the crystal surface, the location and activation are different, which makes the floatability different between perovskite and titanaugite; 2) zeta potential of perovskite remains negative during the whole process and its value decreases with the dosage of hydroxamate increasing, which indicates that hydroxamate is chemically adsorbed on surface of perovskite; 3) the result is also supported by the infrared spectrum study that chemical bounding has happened between CN, N-O functional group of hydroxamate and titanium particles of perovskite.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2002年第1期171-177,共7页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目 (5 95 740 2 1)
关键词
钙钛矿
羟肟酸
水玻璃
动电电位
浮选溶液化学
钛渣
perovskite
flotation
hydroxamate
sodium silicate
zeta potential
solution chemistry
