富氧侧吹熔池熔炼生产金属化镍阳极工艺研究

Research on the Process of Producting Metallized Nickel Anode Plate by Oxygen Enriched Side-blown Smelting Technology

反射炉熔炼二次镍精矿生产镍阳极板工艺,存在燃料的热利用率低、燃料消耗量大,炉体耐火材料使用寿命短、阳极板脆弱易碎、残极率高,熔炼运行成本高、现场操作环境恶劣等问题。本文通过对富氧侧吹熔池熔炼二次镍精矿生产金属化镍阳极板的工艺研究,得到金属化镍锍产品(Ni+Cu≥76%,Fe<3%,S 16%~20%),最佳工艺参数为:在反应温度为1450~1600℃,富氧浓度65%~75%,连续进料速率为100 kg/h条件下,氧料比10~45 Nm^(3)/t,还原剂率为0.5%~1%。随着氧料比增加,镍锍的品位逐渐增加,且铁、硫含量逐渐降低,相应的熔渣含镍逐渐升高。富氧侧吹熔池熔炼生产金属化镍阳极板具备工艺可行性,实现二次镍精矿短流程的“熔化、除铁、降硫”的目的,可产出合格的金属化镍阳极板,明显提高镍阳极板成材率,大幅提高热利用率、提高生产效率和产能,并降低了生产成本。

The existing process of smelting secondary nickel concentrate in reverberatory furnace to produce nickel anode plate has some problems,such as low heat utilization rate of fuel,large fuel consumption,short service life of furnace refractory,fragile anode plate,high residual electrode rate,high operation cost,bad operation environment,etc.The process research of producing metallized nickel anode plate by smelting secondary nickel concentrate in oxygen enriched side-blown smelting technology has been completed.The composition of metallized nickel matte is Ni+Cu≥76%,Fe<3%,and S 16%-20%.The optimum process parameters was as followed:the reaction temperature was 1450-1600℃,the oxygen concerntration was 65%-75%,the continuous feed rate was 100 kg/h,the ratio of oxygen to feed was 10-45 Nm^(3)/t,and the reductant rate was 0.5%-1%.The oxygen enriched side-blown bath smelting technology can produce metallized nickel anode plate,realizes the purpose of“melting,iron removal and sulfur reduction”of secondary nickel concentrate,produces high metallized nickel anode plate,improves the yield of nickel anode plate,greatly improves the heat utilization rate,improves the production efficiency and energy production,and reduces the production cost.