油酸钠或十二胺体系中菱镁矿及其伴生矿物的浮选特性

为了给低品级菱镁矿矿石的选矿提纯提供参考，通过单矿物浮选试验考察了捕收剂油酸钠和十二胺用量、矿浆pH以及调整剂六偏磷酸钠和水玻璃对菱镁矿及其伴生矿物白云石、蛇纹石、滑石、石英可浮性的影响。根据试验结果，指出可以采取先在自然pH条件下通过十二胺反浮选除去石英、滑石和部分白云石，再在pH=11并添加适量六偏磷酸钠条件下通过油酸钠正浮选将菱镁矿与蛇纹石和剩余白云石分离的方法来有效降低菱镁矿矿石中杂质伴生矿物的含量。

Floatability Performance of Magnesite and its Associated Minerals in Sodium Oleate and Lauryl Amine Flotation System

In order to provide a reference for beneficiation and purification of the low-grade magnesite ore，the single mineral flotation tests are made to investigate the influences of inhibitor sodium oleate and the dosage of lauryl amine，pulp pH value and regulators sodium hexametaphosphate and sodium silicate on floatability of magnesite and its associated minerals including dolomite，serpentine，talc and quartz. According to the results，the content of impurities associated minerals among magnesite ore were effectively reduced by firstly removing quartz，talc and part of dolomite with the reverse flotation of lauryl amine under the natural pH conditions and then separating serpentine and remained dolomite from magnesite with direct flotation of sodium oleate under pH value 11 and adding the appropriate amount of sodium hexametaphosphate.