(1.清華大學(xué) 環(huán)境科學(xué)與工程系，北京 100084；
2.東北大學(xué) 材料與冶金學(xué)院，沈陽 110006；
3.東北大學(xué) 資源與土木工程學(xué)院，沈陽 110006)
摘 要: 研究了捕收劑油酸、羥肟酸、十二烷胺雙甲基膦酸，抑制劑氟硅酸鈉、水玻璃對改性渣中鈣鈦礦浮選的影響。通過浮選溶液化學(xué)計算、礦物動電電位、紅外光譜等研究，探討了羥肟酸在鈣鈦礦表面的作用和水玻璃抑制鈦輝石的作用機理。結(jié)果表明：以羥肟酸為捕收劑，水玻璃為抑制劑可實現(xiàn)鈣鈦礦與鈦輝石等的浮選分離。鈣鈦礦和鈦輝石晶體表面的Ca，Ti質(zhì)點密度不同，所處的位置及活性不同，造成二者浮游性有一定的差異；鈣鈦礦在整個研究范圍內(nèi)ζ電位始終為負(fù)值，但在陰離子捕收劑C5-9羥肟酸中可浮性良好，表明C5-9羥肟酸在鈣鈦礦表面發(fā)生了化學(xué)吸附。紅外光譜研究證實，C5-9羥肟酸的C=N，N—O官能團與鈣鈦礦表面的鈦質(zhì)點發(fā)生了化學(xué)鍵合。
關(guān)鍵字: 鈣鈦礦；羥肟酸；水玻璃；動電電位；浮選溶液化學(xué)
perovskite in Ti-bearing blast
furnace slag
NIE Yong-feng1
（1. Department of Environmental Science and Engineering,
Tsinghua University, Beijing 100084, China;
2. School of Materials and Metallurgy,
Northeastern University,Shenyang 110006,China;
3. School of Resource and Civil Engineering,
Northeastern University,Shenyang 110006,China）
Abstract:The effects of sodium oleate, hydroxamate, dodecyl amido-methyl phosphonic acid, sodium fluosilicate, and sodium silicate ont he flotation of perovskite in treated slag have been studied, and the experiments show that perovskite can be effectively separated from richtitanium diopside,titanaugite, and spinel in weak acid pulp, with hydroxamate as collector, sodium silicate as depress ant,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 C=N， N—O functional group of hydroxamate and titanium particles of perovskite.
Key words: perovskite;flotation;hydroxamate;sodium silicate; zeta potential;solution chemistry
