(中南大學(xué) 資源加工與生物工程學(xué)院，長沙 410083)
摘 要: 通過浮選試驗(yàn)、紅外光譜分析、吸附量測試、動電位測試等研究六偏磷酸鈉對方解石浮選行為與表面性質(zhì)的影響。浮選試驗(yàn)結(jié)果表明，六偏磷酸鈉很好地抑制方解石的上浮。機(jī)理測試則表明，六偏磷酸鈉未大量吸附在方解石表面，而是在其作用下，方解石表面的金屬離子Ca2+從固相轉(zhuǎn)入液相，減少方解石表面捕收劑吸附的活性點(diǎn)，從而實(shí)現(xiàn)方解石的浮選抑制。
關(guān)鍵字: 方解石；六偏磷酸鈉；浮選；抑制機(jī)理
（School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:The effect of sodium hexametaphosphate on the flotation of calcite and its surface properties was investigated by flotation test, IR spectroscopy, adsorptive capacity and ζ potential. The flotation result shows that the inhibition of calcite is remarkable when the sodium hexametaphosphate is used. The mechanism tests indicate that hexametaphosphate is not adsorbed too much on the surface of calcite, and the active points of adsorption on the calcite are decreased for Ca2+ on the surface of calcite taken from solid phase to liquid phase under the action of hexametaphosphate, thus calcite is inhibited.
Key words: calcite; sodium hexametaphosphate; flotation; inhibition mechanism
