CAJ | 학술논문

采用盐酸法利用中低品位磷矿制备湿法磷酸。对反应母液的浓缩比例、矿渣循环水洗工艺以及浓缩滤液循环分解磷矿制备磷酸工艺进行了研究。结果表明，浓缩比例为0.35时，总磷沉淀率达到96.08％；循环水洗所得矿渣中硅含量大于50％，可进行硅的提取利用，矿渣中氯含量低，可直接进行干堆处理，浓缩滤液循环10次后制得的湿法磷酸经净化后P2 O5含量达到58％，达到工业级磷酸标准。该循环工艺可避免环境污染，节约资源，具有潜在的经济效益和社会效益。
채용염산법이용중저품위린광제비습법린산。대반응모액적농축비례、광사순배수세공예이급농축려액순배분해린광제비린산공예진행료연구。결과표명，농축비례위0.35시，총린침정솔체도96.08％；순배수세소득광사중규함량대우50％，가진행규적제취이용，광사중록함량저，가직접진행간퇴처리，농축려액순배10차후제득적습법린산경정화후P2 O5함량체도58％，체도공업급린산표준。해순배공예가피면배경오염，절약자원，구유잠재적경제효익화사회효익。
Wet-process phosphoric acid was produced by hydrochlorice acid method using mid-low-grade phosphate rock.The condensation ratio of reaction mother liquor,circle washing process of slag and recycle process of production of phosphoric acid by using concentrated solution decomposing phosphoric rock were studied.The results showed that,the precipitation rate of total phosphorus was 96.08% when the condensation ratio was 0.35;the silicon content of the slag in circle washing process was above 50%,which could be extracted and used.The chlorine content of the slag was low,which could be used in dry stockpiling process.The P2 O5 content of the wet-process phosphoric acid reached 58% after 10 cycles,which was up to the factory standard. The circle process can avoid the pollution of environment and save resources.Therefore the method has the po-tential social and economic benefit.