摘要
通过单矿物浮选试验,考察了Na+、K+、Ca2+、Mg2+、Fe3+、Al3+这6种金属离子在酸性条件下对十二烷基磺酸钠(SDS)浮选蓝晶石的影响,结果表明:一价离子Na+、K+对蓝晶石的浮选基本没有影响;二价离子Ca2+、Mg2+对蓝晶石的浮选有抑制作用,且Ca2+的抑制能力更强;三价离子Fe3+、Al3+对蓝晶石的浮选有活化作用,且Al3+的活化能力更强。以Ca2+和Fe3+分别为二价离子和三价离子的代表,通过溶液化学分析了它们的抑制机理和活化机理,结果表明:钙离子在酸性介质中的主要水解组分为Ca2+,Ca2+易与SDS中的磺酸基形成难溶物,从而使SDS被消耗大量而产生抑制作用;铁离子在酸性条件下对蓝晶石起活化作用的有效水解组分因p H值不同而变化,p H<2.5时Fe OH2+和Fe(OH)2+是起活化作用的有效水解组分,p H≥2.5时Fe(OH)3(s)是起活化作用的有效水解组分。
Through single mineral flotation test,the effects of Na+,K+,Ca2+,Mg2+,Fe3+,Al3+ six metal ions on flotation system of kyanite-sodium dodecyl sulfate ( SDS) were studied. The results showed that monovalent ions Na+,K+ have no effect on flotation behavior of kyanite-SDS;Divalent ions Ca2+,Mg2+ exhibit inhibition effects on flotation of kyanite-SDS,and Ca2+has more intensity;Trivalent ions Fe3+,Al3+exhibit activation on flotation of kyanite-SDS,and Al3+owns more activating abili-ty. The mechanism of inhibition and activation of divalent ions ( representative by Ca2+) and trivalent ions ( representative by Fe3+) is analyzed by solution chemistry. The results showed that in the acidic medium the main component of calcium ion is Ca2+,which is easy to form the insoluble matter together with the sulfonic acid group of SDS,consuming large amounts of phar-macy and exhibiting inhibition. Iron ion has the different active ingredients on playing the role of activation in kyanite-SDS sys-tem at different pH. When pH&lt;2. 5,FeOH2+ and Fe(OH)2+ were the effective components on playing the role of activation, when pH≥2. 5,Fe(OH)3(s) was the effective component on playing the role of activation.
出处
《金属矿山》
CAS
北大核心
2015年第2期73-76,共4页
Metal Mine