CAJ | 학술논문

磷石膏中含有少量可溶磷等杂质，作为石膏胶凝材料直接使用存在不利影响。利用快烧处理3种不同磷杂质含量的磷石膏，通过控制快烧温度和时间，研究了快烧后磷石膏总磷、可溶磷和pH值变化情况，并采用XRD对快烧后磷石膏物相进行分析。结果表明，快烧能明显降低磷石膏可溶磷杂质含量，快烧时间延长和温度提高都有利于可溶磷含量降低；快烧对总磷含量没有影响；快烧处理后磷石膏中有半水石膏生成，磷石膏pH值也明显增加。
린석고중함유소량가용린등잡질，작위석고효응재료직접사용존재불리영향。이용쾌소처리3충불동린잡질함량적린석고，통과공제쾌소온도화시간，연구료쾌소후린석고총린、가용린화pH치변화정황，병채용XRD대쾌소후린석고물상진행분석。결과표명，쾌소능명현강저린석고가용린잡질함량，쾌소시간연장화온도제고도유리우가용린함량강저；쾌소대총린함량몰유영향；쾌소처리후린석고중유반수석고생성，린석고pH치야명현증가。
The soluble phosphate impurities in phosphogypsum impede its utilization in directly producing binding material. Three phosphogypsums with different content of phosphate impurities were treated by fast ifring for different time and temperature. After fast ifring, the total phosphate content, soluble phosphate content and pH value of phosphogypsum were measured and mineral phases were analyzed using XRD. It is shown that the soluble phosphate content decreased considerably after fast ifring with increasing of the treating time and temperature. The fast ifring would not change the total phosphate content in phosphogypsum whatever ifring conditions were used. The hemihydrate gypsum appeared and the pH value increased after fast ifring.