甲基纤维素的应激反应及其对滑石浮选的影响
发布时间：2019-02-13 07:56
【摘要】：通过浮选试验、吸附试验及动电位测试,研究不同温度下甲基纤维素在滑石表面的吸附行为,考察温度对滑石表面已吸附的甲基纤维素抑制效果的影响。结果表明:当温度较低时,甲基纤维素溶解在水中,通过疏水作用吸附在滑石表面,吸附量较低,对滑石的抑制效果较弱;随着温度升高,甲基纤维素从溶液中析出,沉积在滑石表面,吸附量较大,抑制效果较强。已经吸附在滑石表面的甲基纤维素的抑制效果也受温度影响,温度升高会导致吸附的甲基纤维素层的抑制效果减弱,且这种变化是可逆的,温度再降低会使甲基纤维素吸附层的抑制效果再次增强,这是由于温度较低时滑石表面吸附的甲基纤维素通过羟基与水分子形成氢键而结合,导致矿物表面亲水性较强,从而对滑石产生较强的抑制作用;当温度升高时,甲基纤维素分子失去结合水,含水量降低,对滑石抑制效果减弱。
[Abstract]:The adsorption behavior of methyl cellulose on talc surface at different temperatures was studied by flotation test, adsorption test and potentiodynamic test. The effect of temperature on the inhibition effect of adsorbed methyl cellulose on talc surface was investigated. The results showed that when the temperature was low, methyl cellulose dissolved in water and adsorbed on the surface of talc by hydrophobic interaction, the adsorption amount was lower, and the inhibition effect on talc was weak. With the increase of temperature, methyl cellulose precipitated from the solution and deposited on the surface of talc. The inhibition effect of methyl cellulose which has been adsorbed on talc surface is also affected by temperature. The increase of temperature will weaken the inhibition effect of the adsorbed methyl cellulose layer, and this change is reversible. When the temperature is lower, the inhibition of the adsorption layer of methyl cellulose will be enhanced again, which is due to the fact that when the temperature is low, the methyl cellulose adsorbed on the talc surface combines with the water molecule by forming a hydrogen bond between the hydroxyl group and the water molecule, which leads to the stronger hydrophilicity on the mineral surface. Thus, it has a strong inhibitory effect on talc. When the temperature increases, the molecular of methyl cellulose loses the binding water, the water content decreases, and the inhibition effect on talc is weakened.
【作者单位】： 江西理工大学资源与环境工程学院;西部矿业股份有限公司博士后科研工作站;
【基金】：国家自然科学基金资助项目(51404109) 中国博士后科学基金资助项目(2015M582759XB) 江西理工大学清江青年英才支持计划资助项目~~
【分类号】：TD923.1
本文编号：2421338
[Abstract]:The adsorption behavior of methyl cellulose on talc surface at different temperatures was studied by flotation test, adsorption test and potentiodynamic test. The effect of temperature on the inhibition effect of adsorbed methyl cellulose on talc surface was investigated. The results showed that when the temperature was low, methyl cellulose dissolved in water and adsorbed on the surface of talc by hydrophobic interaction, the adsorption amount was lower, and the inhibition effect on talc was weak. With the increase of temperature, methyl cellulose precipitated from the solution and deposited on the surface of talc. The inhibition effect of methyl cellulose which has been adsorbed on talc surface is also affected by temperature. The increase of temperature will weaken the inhibition effect of the adsorbed methyl cellulose layer, and this change is reversible. When the temperature is lower, the inhibition of the adsorption layer of methyl cellulose will be enhanced again, which is due to the fact that when the temperature is low, the methyl cellulose adsorbed on the talc surface combines with the water molecule by forming a hydrogen bond between the hydroxyl group and the water molecule, which leads to the stronger hydrophilicity on the mineral surface. Thus, it has a strong inhibitory effect on talc. When the temperature increases, the molecular of methyl cellulose loses the binding water, the water content decreases, and the inhibition effect on talc is weakened.
【作者单位】： 江西理工大学资源与环境工程学院;西部矿业股份有限公司博士后科研工作站;
【基金】：国家自然科学基金资助项目(51404109) 中国博士后科学基金资助项目(2015M582759XB) 江西理工大学清江青年英才支持计划资助项目~~
【分类号】：TD923.1
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，本文编号：2421338
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