【作者】 龚贵生；

【导师】 宁平； 戴惠新；

【作者基本信息】 昆明理工大学 ， 环境工程， 2003， 硕士

【摘要】 磷矿资源的合理，有效利用是把我省建设全国最大的磷复肥基地的关键因素之一，云南磷矿资源丰富，但Ⅰ品级磷矿所占比例不足10％，几十年的开采，Ⅰ品级矿所剩不多，中低品位磷矿利用研究已成为云南磷化工发展的紧迫深题。 多年来，中低品位磷矿大量废置，造成水土流失，水资源受到一定程度的污染。我们对大量参考文献进行分析研究，针对云南磷矿中低品位硅，碳酸钙盐（镁盐）含量较高的实际，结合湿法磷酸用矿指标要求，以江川清水沟磷矿为主要研究对象，选择去除部分碳酸钙（镁）盐，石英质硅，铁，铝等杂质，提高所含磷的品位，通过采用煅烧—消化—分级和电选方法进行处理，达到了较好效果。 ① 对24.5—24.9％品级中品位矿，可产出P₂O₅30％以上的优质精矿，MgO／P₂O₅及R₂O₃均低于3％。回收率达83.26％。 ② 对19.5～19.9％品级的硅质矿，可产出P₂O₅28.78％矿。回收率达79.64％。 ③ 对14.5～14.9％品级的低品级矿，P₂O₅能提高13个百分点，回收率达62.73％。 我们在实验中还探讨了电选的最佳工艺，为下一步工业化打下了一定基础。更多还原

【Abstract】 One of the critical factors to develop our province to be a largest base of phosphorous compound fertilizer is to make use of phosphorous mineral resources appropriately and efficiently. Although there is abundant of phosphorous mineral in Yunnan province, the best phosphorous mineral is under 10% of the total. Through so many years of exploitation, preservation of the best phosphorous mineral is little. It is keen that mid-and-low phosphorous mineral exploitation and research becomes the urgent problem of the development of the Yunnan phosphorous chemistry engineering.From many years, soil resource has been running down and water resource has been being contaminated because of the disuse of much mid-and-low phosphorous mineral. We have gained a rather good result in Jiangchuan Qingshuigou phosphorous mineral by method of calcination-digestion - classification - electric selection, secondly, partially demineralization of CaCO3, MgCO3, quartz silica, iron and alumina ect. according to the need of mineral in wet producing phosphorate and by processing the mid-and-low phosphorous mineral. Before doing this we have been read and analyzed many documents according to the mid-and-low mineral fact of Yuannan phosphorous mineral.1.available high-quality mineral containing 30% P2O5, above 3% MgO/P2O5 and R2O3 and 83.26% recovery for the 24.5-24.9% mid mineral.2.available mineral containing 28.78% P2O5 and 79.64% recovery for the 19.5-19.9% silica mineral.3.available increasing 13 percent of P2O5 and 62.73% recovery for the 14.5-14.9% low mineral.We also have investigated the optimized technology of electric selection, establishing the ground for industrialization in the next stage.更多还原