高镁磷矿化学脱镁过程的工艺研究  

Study on the process of magnesium removal from phosphate rocks with high content of magnesium by chemical method

作　　者：张雪杰[1] 张志业[1] 王辛龙[1] 

机构地区：[1]四川大学化工学院,四川成都610065

出　　处：《化工矿物与加工》2010年第2期1-3,13,共4页Industrial Minerals & Processing

基　　金：四川省科技支撑计划(2008GZ0025)

摘　　要：本文以磷矿硫酸脱镁为背景，选取马边磷矿为代表性矿样，通过正交实验设计及极差分析获得了该磷矿脱镁的实验室较佳工艺条件：即反应温度为55℃、pH值为3．0、磷矿初始粒度为150-180μm、液固比为2．0：1、反应时间为2．0h。同时对实验数据进行了回归分析，得到了磷矿脱镁后磷镁比的数学模型，该模型能较好地反映磷矿脱镁的宏观反应过程。在最优工艺条件下，可使该磷矿中镁脱除率达到68．42％，而磷的损失率仅为2．61％，处理后的磷矿接近HG／T2673—1995湿法加工用磷矿Ⅱ类标准。This paper is based on the background of magnesium removing from phosphate rocks cy sulfuric acid. Mablan phosphate ore was selected as the representative sample. The optimal process conditions were obtained by the orthogonal experiment design and range analysis： reaction temperature was about 55 ℃, pH value was 3.0 , particle size of phosphate rock was between 150μm and 180μm, ratio of liquid phase over solid phase was 2.0 ： 1, and the residence time was 2.0 hours. Through the regression analysis of experimental data, the mathematical model of weight ratio of phosphorus to magne- sium from the treated phosphate rock. The model could be used to explain the macro-reaction process of phosphate pretreatment. Final- ly, under the optimal experimental conditions, the ratio of magne- sium removing from phosphate rock was 68.42%, the phosphorus loss was only 2.61% and the treated phosphate rock could near HG/ T 2673 - 1995 standard oI phosphate rock for the process of wet phosphoric acid in Grade II.

关 键 词：磷矿 脱镁 正交设计 回归分析 

分 类 号：TD925.6[矿业工程—选矿]