本文采用分别代表沉积、内生、变质3种类型的6个中低品位磷矿,制成普通磷矿粉(PR)和超细磷矿粉(MPR)。使用连续浸提法研究了PR和MPR在柠檬酸、甲酸、草酸、酒石酸的溶解特性。结果表明:无论是PR还是MPR,释放磷最高峰基本都在第一次,只有4种普通磷矿粉在2%柠檬酸连续浸提时最高峰出现在二次或第三次;PR在柠檬酸、甲酸、酒石酸的溶解沉积型磷矿粉释放最快,MPR在4种酸中变质型磷矿粉释放较快;MPR不论在何种酸中都比PR释放总量大且快,表明磷矿粉磷释放量与粒径关系密切,粒径减小显著增加了磷释放量,MPR比PR提高倍数柠檬酸、甲酸、酒石酸的规律相近,都是沉积型<内生型<变质型。 In this paper, 6 medium and low grade phosphate rocks, representing sedimentary, endogenous and metamorphic types, respectively, were used to make common phosphate rock (PR) and ultrafine rock phosphate rock (MPR). Continuous extraction was used to study the solubilities of PR and MPR in citric acid, formic acid, oxalic acid and tartaric acid. The results showed that the peak of phosphorus release was basically the first time in both PR and MPR, and only four kinds of common phosphate rock appeared the second or third time when 2% citric acid was continuously extracted. Acid, formic acid, tartaric acid dissolved sedimentary phosphate rock release the fastest, MPR in four kinds of acid metamorphic phosphate rock release faster; MPR regardless of which acid than the total PR release large and fast, indicating that phosphorus The release of phosphate powder is closely related to the particle size. The decrease of particle size significantly increases the release of phosphorus. The MPR is similar to that of citric acid, formic acid and tartaric acid in multiples of PR, both of which are sedimentary