六偏磷酸钠对低品位硫化铜镍矿浮选降镁的影响

Effect of sodium hexametaphosphate on magnesium reduction during a low grade copper-nickel sulphide flotation process

某硫化铜镍矿MgO含量较高,采用常规药剂浮选时所得精矿MgO含量也较高,严重影响后续冶炼工艺。采用六偏磷酸钠为浮选调整剂,研究了六偏磷酸钠对硫化铜镍矿浮选降镁的影响。结果表明,六偏磷酸钠在一段、二段粗选的最佳用量分别为300 g/t和100 g/t,与不添加六偏磷酸钠相比,在此条件下的精矿镍回收率提高了0.99%,高精矿氧化镁品位降低1.5%,低精矿氧化镁品位降低3.80%。

The MgO content of a copper-nickel sulfide ore is high,and the MgO content of the concentrate obtained by conventional reagent flotation is also high,which seriously affects the subsequent smelting process.Using sodium hexametaphosphate as flotation regulator,the effect of sodium hexametaphosphate on the flotation and magnesium reduction of copper nickel sulfide ore was studied.The results show that the best dosage of sodium hexametaphosphate in the primary and secondary roughing is 300 g/t and 100 g/t respectively.Comparing with no sodium hexametaphosphate,the recovery of concentrate nickel increases by 0.99%,the grade of high concentrate magnesium oxide decreases by 1.6%,and the grade of low concentrate magnesium oxide decreases by 3.80%.