CAJ | 학술논문

以贵州瓮福磷石膏为原料,探讨了碳酸铵循环法利用磷石膏制取硫酸的改进工艺。通过热重、气相质谱连用技术分析了转氨法关键步骤———硫酸氨分解特征,并指导确定了分解温度以避免不利副反应的发生。通过优化实验,使磷石膏与碳酸铵复分解反应制备硫酸铵的转化率达到92.93%。而硫酸铵与氧化铁固相反应的实验结果表明：420℃,1h时,氨气回收率达86.57%；700℃,1h时,SO3回收率达到93.75%,两步法工艺可以较好的实现氮和硫元素的回收循环。磷石膏转氨法制硫酸,一次性资源消耗和 CO2排放量较低,副产品经济价值较高,环境相容性较好,具有更好的工业化前景。
이귀주옹복린석고위원료,탐토료탄산안순배법이용린석고제취류산적개진공예。통과열중、기상질보련용기술분석료전안법관건보취———류산안분해특정,병지도학정료분해온도이피면불리부반응적발생。통과우화실험,사린석고여탄산안복분해반응제비류산안적전화솔체도92.93%。이류산안여양화철고상반응적실험결과표명：420℃,1h시,안기회수솔체86.57%；700℃,1h시,SO3회수솔체도93.75%,량보법공예가이교호적실현담화류원소적회수순배。린석고전안법제류산,일차성자원소모화 CO2배방량교저,부산품경제개치교고,배경상용성교호,구유경호적공업화전경。
Producing sulfate acid with ammonium-transferred method was studied using phosphogypsum from Wengfu Guizhou Ltd.The decomposition of Ammonium sulfate was analyzed by thermogravimetry-mass spectrum (TG-MS),and the decomposition temperature was determined to avoid the side reaction.According to results,ammonium sulfate transformation rate can reach 92.93%,recycle rate of NH3 can reach 86.57% at 420℃ for 1h,and recycle rate of SO3 can reach 93.75% at 700℃ for 1h.Nitrogen and sulfur are recycled effectively via the process.It turns out that the ammonium-transferred method is best for industrialization of sulfuric acid production.