第41卷第3期陕西科技大学学报Vol.41No.32023年6月JournalofShaanxiUniversityofScience&TechnologyJun.2023*文章编号:2096-398X(2023)03-0001-06黑液燃烧法绿液除硅绿液硅不溶物的形貌组成及其性能研究徐永建,裴阳华,张晶茹,张莹(陕西科技大学轻工科学与工程学院轻化工程国家级实验教学示范中心中国轻工业纸基功能材料重点实验室陕西省造纸技术及特种纸品开发重点实验室,陕西西安710021)摘要:采用偏铝酸钠和硫酸镁复配除硅剂进行竹浆黑液燃烧法绿液除硅研究,获得绿液硅不溶物,采用ICP及SEM-EDAX确定组成,采用SEM观察形貌,采用激光粒度仪以及沉降法测定绿液硅不溶物粒径分布、沉降体积和时间评价绿液硅不溶物的沉降性能.研究表明,偏铝酸钠和硫酸镁复配除硅剂具有较好的除硅效果,除硅剂摩尔比Si∶Al∶Mg为1∶0.3∶0.4时,除硅率最高可达86.17%,绿液硅不溶物的球形块状结构最明显,絮聚最明显,同时伴随着表面吸附着更细小的绿液硅不溶物颗粒;除硅剂摩尔比Si∶Al∶Mg为1∶0.35∶0.35,绿液中Al、Mg元素含量最低,除硅率为85.84%,相应的绿液硅不溶物的平均粒径最大,为39μm,粒径主要集中在3~70μm,沉降性能也较好;除硅剂摩尔比Si∶Al∶Mg为1∶0.3∶0.4和1∶0.35∶0.35的绿液硅不溶物Si元素含量最高,为5.82%,后者绿液硅不溶物Al、Mg元素含量高于前者,最终确定除硅剂配比工艺Si∶Al∶Mg为1∶0.35∶0.35.关键词:竹浆黑液;黑液燃烧法除硅;复合除硅剂;除硅剂摩尔配比中图分类号:TS7文献标志码:AStudyonmorphologycompositionandpropertiesofgreen-liquor-silicon-insolublesfromgreenliquordesilicationviablackliquorcombustionprocessXUYong-jian,PEIYang-hua,ZHANGJing-ru,ZHANGYing(CollegeofBioresourcesChemicalandMaterialsEngineering,NationalDemonstrationCenterforExperimentalLightChemistryEngineeringEducation,KeyLaboratoryofPaperBasedFunctionalMaterialsofChinaNation-alLightIndustry,ShaanxiProvinceKeyLaboratoryofPapermakingTechnologyandSpecialtyPaper,ShaanxiUniversityofScience&Technology,Xi'an710021,China)Abstract:Thegreen-liquid-silicon-insoluble(GLSI)wasobtainedthroughgreenliquordesilica-tionviablackliquorcombustionprocessusingNaAlO2andMgSO4ascompounddesilicationagentsinthisstudy.Themorphology,compositionandpropertiesofGLSIwerestudied.ICPandSEM-EDAXwereusedtodeterminethecomposition,andSEMwasusedtoo...
