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Mark Ⅳ型表面力测定仪常用于测定在不同pH条件下,十二烷胺氯化氢捕收剂溶液中云母表面之间的直接力。发现在pH9.5时,远程疏水力达列最大,与此相一致的是石英的接触角和浮选回收率也达到最大值。云母和石英表面的电荷密度是相近的(0.40～0.48nm~2)。所以,云母的直接力测定结果可用于石英的浮选中。在pH8.0～10.3范围内,石英浮选回收率最大,首先是由于存在远程疏水力,其次是与紧密包裹的单分子层(或半胶态分子团)的生成有关系(由于水解产生中性胺)。
Mark Ⅳ surface force meter is commonly used to determine the direct force between mica surfaces in dodecylamine hydrogen chloride collector solutions at different pH conditions. Found at pH9.5, the maximum remote hydrophobic force column, consistent with this is the contact angle of quartz and flotation recovery also reached its maximum. The charge density of mica and quartz surfaces are similar (0.40 ~ 0.48nm ~ 2). Therefore, mica direct force determination results can be used for quartz flotation. In the pH range of 8.0 to 10.3, quartz has the highest flotation recovery, due firstly to the existence of long-range hydrophobicity and secondly to the formation of a tightly packed monolayer (or semi-colloidal molecular group) due to hydrolysis Amine).