油酸钠和十二胺盐酸盐在长石和石英表面的吸附

ADSORPTION OF SODIUM OLEATE AND DODECYL AMINE HYDROCHLORIDE ON FELDSPAR AND QUARTZ

对油酸钠和十二铵盐酸盐在长石和石英表面的吸附性质进行了研究。发现油酸根离子在石英表面吸附,主要是静电作用的结果,而长石表面的油酸根离子除静电吸附外,还产生了化学吸附,生成了油酸铝。加入抑制剂后,石英表面的油酸吸附层被解吸,而长石表面的吸附层却大部分保留,成为加入胺类捕收剂的吸附活性区,活化了长石的浮选,造成了石英和长石的可浮性差异。

This paper studies the adsorttion properties of sodium oleate and dodecyl amine hydrochloride on feldspar and quartz, and gives their adsorption models. It was founded that the adsorption of oleatc ions on the sufaces of quartz is attributcd to electrostatic effect and besides the electrostatic adsorption, the chemical adsorption of oleate ions would take place on the surfaces on feldspar, forming aluminum oleate. After addition of the depressant, the oleate adsorption layer on the surfaces of quartz would be deadsorbed and that on the surfaces of feldspar remained partly. The remainders on the snrfaces of feldspar can provide active areas for amine collectors which can activate feldspar flotation, resulting in the difference in floatability between feldspar and quartz.