【摘要】：煤油是浮選輝鉬礦常用的捕收劑,為了解其在浮選過(guò)程中與輝鉬礦的相互作用,研究了時(shí)間、初始濃度、pH值等因素對(duì)煤油在輝鉬礦表面的吸附與解吸行為的影響。結(jié)果表明,初始濃度為240 mg/L時(shí),煤油在輝鉬礦表面的吸附在前40 min較快,隨后趨于緩慢,并在90 min時(shí)達(dá)到吸附平衡;隨著初始濃度的增加,煤油在輝鉬礦表面吸附量不斷增大且不易解吸;強(qiáng)堿性環(huán)境不利于煤油在輝鉬礦表面的吸附,且解吸比增至60%以上。采用準(zhǔn)一級(jí)動(dòng)力學(xué)模型及準(zhǔn)二級(jí)動(dòng)力學(xué)模型對(duì)試驗(yàn)數(shù)據(jù)進(jìn)行擬合,通過(guò)誤差分析評(píng)價(jià)模型擬合度,得出準(zhǔn)二級(jí)動(dòng)力學(xué)的線性形式和非線性形式都可以較好地描述輝鉬礦吸附煤油的行為。
[Abstract]:Kerosene is a common collector for flotation molybdenum. In order to understand the interaction between kerosene and molybdenum during flotation, the effects of time, initial concentration and pH value on the adsorption and desorption behavior of kerosene on molybdenum surface were studied. The results show that when the initial concentration is 240 mg/L, the adsorption of kerosene on molybdenum surface is faster than that of the first 40 min, then tends to slow, and reaches adsorption equilibrium at 90 min. With the increase of initial concentration, the amount of kerosene adsorbed on the surface of molybdenum is increasing and it is difficult to desorption, and the strong alkaline environment is not conducive to the adsorption of kerosene on the surface of molybdenum, and the desorption ratio increases to more than 60%. The quasi-first-order dynamic model and quasi-second-order dynamic model are used to fit the test data, and the fitting degree of the model is evaluated by error analysis. It is concluded that the linear and nonlinear forms of quasi-second-order kinetics can well describe the behavior of molybdenum adsorbing kerosene.
【作者單位】： 中國(guó)礦業(yè)大學(xué)化工學(xué)院;國(guó)家煤加工與潔凈化工程技術(shù)研究中心;
【基金】：國(guó)家自然科學(xué)基金(51574240)
【分類號(hào)】：TD923.13;TD954

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