-58-第45卷第6期非金属矿Vol.45No.62022年11月Non-MetallicMinesNovember,2022重晶石矿沉淀法制备硫酸钡粒径调控研究杨斌*杨贵惠王婧索超辉张昌谢宁（安康学院化学化工学院，安康市纳米新材料工程技术研究中心，陕西安康725000）摘要以BaS和Na2SO4为原料，采用直接沉淀法制备BaSO4粉体。对BaSO4的晶相、形貌和粒径分布进行表征，研究了影响BaSO4粉体粒径的因素。结果表明，提高Na2SO4溶液浓度，加快滴加速度，或提高反应温度，BaSO4粉体平均粒径均显著增加。Na2SO4浓度为0.4mol/L，滴加速度为10mL/min，粒径范围和平均粒径均随反应温度的升高而逐渐增大，平均粒径由40℃时的8.380μm增加到100℃时的14.129μm。在100℃使用乙二胺四乙酸（EDTA）后，粒径范围明显缩小，平均粒径降至4.961μm。使用理论沉淀质量2%、4%和6%的硬脂酸钠改性，用量为2%时粉体分散性最好，粒径为0.953μm。通过调节Na2SO4溶液浓度和滴加速度，再用适量EDTA和硬脂酸钠等工艺优化措施，采用直接沉淀法可以制备出亚微米级BaSO4粉体。关键词硫酸钡粉体；直接沉淀法；粒径分布；乙二胺四乙酸；硬脂酸钠中图分类号：TQ132.2；TQ623.1文献标志码：A文章编号：1000-8098(2022)06-0058-05StudyonParticleSizeRegulationofBariumSulfatePreparedbyBaritePrecipitationYangBin*YangGuihuiWangJingSuoChaohuiZhangChangXieNing(AnkangResearchCentreofNewNano-materialsScienceandTechnology,SchoolofChemistryandChemicalEngineering,AnkangUniversity,Ankang,Shaanxi725000）AbstractBaSO4waspreparedfromBaSandNa2SO4bydirectprecipitationmethod.Thecrystalphase,morphologyandparticlesizedistributionofBaSO4werecharacterized,andthefactorsaffectingtheparticlesizeofBaSO4powderwerestudied.TheresultsshowedthattheaverageparticlesizeofBaSO4powdercanbesignificantlyincreasedbyincreasingtheconcentrationofNa2SO4solution,speedingupitsdroppingrate,orincreasingthere-actiontemperature.At0.4mol/LNa2SO4concentrationand10mL/mindroppingrate,theparticlesizerangeandaverageparticlesizeincreasedwiththeincreaseofreactiontemperature,theaverageparticlesizeincreasedfrom8.380μmat40℃to14.129μmat100℃.WhenEDTAwasappliedat100℃,theparticlesizerangewassignificantlyreducedto4.961μm.Thedispersibilitywasimprovedbyusingsodiumstearatewiththemassratioo...
