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通过浮选试验、沉降试验和Zeta电位测试,研究了绿泥石和蛇纹石的聚集分散及抑制行为,并对其机制进行了分析。浮选试验结果表明:六偏磷酸钠对绿泥石和蛇纹石不具有抑制作用;羧甲基纤维素是绿泥石的有效抑制剂,但不会影响蛇纹石的浮选。蛇纹石和绿泥石共存时,单独使用六偏磷酸钠或羧甲基纤维素均不能抑制蛇纹石和绿泥石混合矿的浮选,而同时使用六偏磷酸钠和羧甲基纤维素能够抑制蛇纹石和绿泥石混合矿的浮选,六偏磷酸钠和羧甲基纤维素共同作用下,混合矿浮选回收率从31.4%降低到8.7%。Zeta电位测试和沉降试验结果表明,绿泥石的等电点p H约为4.5,蛇纹石等电点p H约为11.8,在硫化铜镍矿浮选常用的弱碱性p H区间,蛇纹石与绿泥石表面电性相反,容易发生异相凝聚。异相凝聚使不能被羧甲基纤维素抑制的蛇纹石罩盖在绿泥石表面,影响了羧甲基纤维素对绿泥石的抑制作用。加入六偏磷酸钠可以改变蛇纹石表面电位,分散绿泥石与蛇纹石混合矿,消除蛇纹石对羧甲基纤维素抑制绿泥石的影响。
Through the flotation test, sedimentation test and Zeta potential test, the aggregated dispersion and inhibition behavior of chlorite and serpentine were studied and the mechanism was analyzed. Flotation test results show that: sodium hexametaphosphate chlorites and serpentinite does not have an inhibitory effect; carboxymethyl cellulose chlorite is an effective inhibitor, but does not affect the serpentine flotation. When both serpentine and chlorite coexist, neither sodium hexametaphosphate nor carboxymethylcellulose alone can inhibit flotation of serpentine and chlorite mixed mines, while the use of sodium hexametaphosphate and carboxymethyl cellulose simultaneously The flotation of mixed serpentinite and chlorite ore was suppressed. The flotation recovery of the mixed ore decreased from 31.4% to 8.7% under the combined effect of sodium hexametaphosphate and carboxymethyl cellulose. The results of Zeta potential and sedimentation tests show that the pI of chlorite is about 4.5, and the pI of serpentine is about 11.8. During the weak alkaline p H interval commonly used in flotation of copper nickel sulfide ore, Serpentine and chlorite surface electrical opposite, prone to heterogeneous condensation. Heterogeneous agglomeration of serpentine can not be inhibited by carboxymethyl cellulose cover the chlorite surface, affecting the carboxymethyl cellulose inhibition of chlorite. Adding sodium hexametaphosphate can change the surface potential of serpentine, disperse the mixture of chlorite and serpentine, and eliminate the influence of serpentine on the inhibition of chlorite by carboxymethylcellulose.