湿法炼锌沉铁渣和浸锌渣的焙烧预处理

发布时间：2018-03-14 18:37

  本文选题：沉铁渣　切入点：浸锌渣　出处：《中国有色金属学报》2016年01期 　论文类型：期刊论文

【摘要】：采用电阻炉对湿法炼锌沉铁渣和浸锌渣进行焙烧预处理。考察氧气浓度、焙烧温度、焙烧时间和气体流量对沉铁渣脱硫率以及焙烧矿硫含量的影响;利用XRD和SEM-EDS技术对沉铁渣焙烧矿和浸锌渣焙烧矿的物相及微观形貌进行表征。结果表明:焙烧脱硫处理湿法炼锌沉铁渣和浸锌渣是可行的;沉铁渣焙烧预处理的合适工艺条件为氧气浓度70%,气体流量0.2 L/min,经1300℃焙烧反应20 min,沉铁渣脱硫率为98.2%,焙烧矿硫含量从8.15%降低到0.253%(质量分数),达到炼铁入炉原料硫含量的要求;沉铁渣焙烧矿的物相组成主要是Zn Fe2O4,浸锌渣焙烧矿的物相组成主要是Zn Fe2O4和Pb2SO5,Pb2SO5的生成表明浸锌渣中Pb SO4分解脱硫不彻底,这是浸锌渣焙烧矿硫含量偏高的主要原因。
[Abstract]:The iron slag and zinc leaching slag of hydrometallurgy were pretreated by resistance furnace. The effects of oxygen concentration, calcination temperature, roasting time and gas flow rate on the desulphurization rate and sulfur content of calcined slag were investigated. XRD and SEM-EDS techniques were used to characterize the phase and micromorphology of iron precipitated slag roasting ore and zinc leaching slag roasting ore. The results showed that it was feasible to treat zinc precipitated iron slag and zinc leaching slag by roasting desulphurization. The suitable technological conditions are oxygen concentration 70, gas flow rate 0.2 L / min, calcination reaction at 1300 鈩，

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