锌焙砂硫酸浸出渣中分离ZnFe_2O_4的研究

Research of Separating ZnFe_2O_4 from Zinc Calcine Sulfuric Acid Leaching Residue

以锌焙砂为原料,经硫酸浸出后对矿浆保温沉淀固液分离后进行高温磁力搅拌水洗,过滤烘干筛分后加入添加剂固相氧化焙烧进行粗提纯,对粗提纯产品筛分产物加入添加剂高能球磨机械活化后固相焙烧进行精提纯,并对产品进行粒度分析、XRD分析及EDS分析。结果表明,提纯产品中铁酸锌含量高达98%,产品主要集中于0.240~3.802μm、3.802~17.378μm、17.378~138.038μm三个粒级,分别占41.83%、36.70%、21.47%。粒级越小,粒度分布越大,-20μm粒级达到80%。产品形貌已经具有一定的粉体性状,经进一步的细化和均匀化等处理,有望制备出高性能的铁酸锌特性材料。

Taking zinc calcine as raw materials, water washing with high temperature and magnetic stirring were carried out after solid - liquid separation at constant temperature following sulfuric acid leaching. The leaching product was used for solid phase oxidation roasting after filtration, drying, screening and adding additive. The screening product of rough purification was roasted after adding additive and mechanical activation by high energy ball milling. The fine purification product was further studied by laser particle size analysis, XRD and EDS analysis. The results showed that zinc ferrite content was high to 98% , and it mainly concentrated into 0. 240 - 3. 802 txm, 3. 802 17. 378 μm and 17. 378 - 138. 038 μm size fractions, of which the proportions were 41.83% , 36.70% and 21.47% , respectively. The smaller the particle size was, the larger the particle size distribution would be. Thus, the content of -20 μm particle size was 80%. At present, the product with a certain powder properties could be processed into high performance zinc ferrite materials by further refinement and homogenization treatment.