汉源磷钾矿特性及热分解过程研究
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摘要
汉源磷钾矿是我国目前最大的唯一有开发价值的磷钾共生矿,本论文在国内首次对汉源磷钾矿的特性及其热分解组成进行了X—射线衍射分析为主的物相组成的定量分析研究,其研究成果可为汉源磷钾矿的工业应用提供重要的理论指导,同时对给X—射线衍射的定量分析用于矿物组成研究提供了创新性思路。
     本文以汉源磷钾矿为原料,在磷钾矿中添加碳酸钙和硫酸钙等添加剂进行高温热分解后用硫酸萃取磷钾矿磷、钾,研究体系的焙烧温度、物料配比等工艺条件,其最佳操作条件为当物料质量配比m(磷钾矿):m(硫酸钙):m(碳酸钙)=1:1:1时,1100℃下反应1h,K_2O萃取率87.2%,P_2O_5萃取率达64.8%。同时,还考察了汉源磷钾矿中K_2O萃取率与时间的动力学关系,建立了相关性高,有意义的α=a(1-e~(-bt))经验关系式,其中参数a为一定温度下K_2O的平衡转化率,参数凸与反应活化能相关。
Hanyuan phosphate-potassium ores is the only valuable ores for exploitation in China so far. The characteristic of Hanyuan phosphate-potassium ores and thermal decomposition constituent are first studied by using the method of X-ray diffraction quantitative analysis in this thesis. The results can be applied in guiding the process of Hanyuan phosphate-potassium ores application and provide the creative thinking way for the application of the method of X-ray diffraction quantitative analyzing constituent of ores.
    The technical condition of temperature and mass ratio of Hanyuan phosphate-potassium ores is studied. Hanyuan phosphate-potassium ores is taken first thermal decomposition with the addition of CaCO3,CaS04 and CaCO3+CaSO4,then the mixture is extracted by H2SO4 for phosphate and potassium. The best operating condition is that when m(phosphate-potassium ores):m(CaSO4):(CaCO3) is 1:1:1 at 1100 ,the potassium extraction efficiency reaches 87.2%, the phosphate extraction efficiency reaches 64,8%. Meanwhile, the kinetics relationship of the K2O extraction efficiency of Hanyuan phosphate-potassium ores and the time is studied to build the experience formula of a = a(1-e-bt) which is highly correlated and meaningful.
    The parameter a stands for the balance translating rate while the parameter b is related with the reaction activation energy.
引文
[1]张允湘等.磷肥及复合肥料工艺[M].成都:成都科技大学出版社,1999:5-9
    [2]田改仓等.论钾长石制钾肥的开发前景[J]化学工业.1997,24(2):18-20
    [3]Homme M P. Potash. Canada Mining Yearbook[J]Potash. 1992,38:3—19
    [4]国家科委蓝皮书[M].北京:中国技术政策农业版,1985:250—290
    [5]林耀庭等.对发展我国钾肥工业的思考[J]化肥工业,1994,4:13—15
    [6]刘汉钊等.福泉磷钾矿综合利用研究化工矿物与加工,1999,3:25—29
    [7]郭峰,袁孝淳等.钾长石热分解及还原的热力学分析化学工业,1998,1:35—38
    [8]邱会龙,金作美,王励生等.钾长石—石膏—碳酸钙热分解过程动力学实验研究[J]高校化学工程学报,2000.10,4(3):258-263
    [9]Goossens, D., Pijpers, A. Dissolution study of potassium feldspars using hydrothermally treated sanidine as an example Surface and Interface [J]Analysis, v27, n1 , Jan 1999:p37
    [10]王万金等.利用不溶性钾矿提钾的研究现状及展望[J]地质科技情报,1996,9,15(3):58-61
    [11]韩效钊等.钾长石烧结法制钾肥时共烧结添加剂研究[J]非金属矿,1997,5:27-30
    [12]薛彦辉等.钾长石低温烧结法制钾肥[J]非金属矿,2000,23(1):19-22
    [13]孙建鼎等.滇池地区磷矿含钾岩层的开发与综合利用[J]露天采煤技术,1999(2):15-18
    [14]U·S·P,1295601
    [15]彭清静,彭良斌,邹晓勇,黄诚等.氯化钙浸取钾长石提取钾过程的研究[J]吉首大学学报,2002,022:1-5
    [16]周贵云等.我国几种典型磷矿反应特性和发泡特性的研究[J]磷肥与复肥,1996,4:13-15
    [17]Kahraman, H. Behaviour of selected minerals in an improved ash fusion test: Quartz, potassium feldspar, sodium feldspar, kaolinite, illite, calcite, dolomite, siderite, pyrite and apatite [J]Fuel, 78, 12, 1999, Elsevier Science Ltd p1449-1461
    [18]闫福林等.钾长石煅烧活化制备钾硅肥试验研究[J]非金属矿,1997,7,22(4):22-23
    [19]邱会龙,王励生,金作美等.钾长石热分解热力学分析和△G°_t计算[J]化肥工业,26(4):29—33
    
    
    [20]J.M.史密斯著,王建华等译.化工动力学[M]化学工业出版,成都科技大学出版社,北京,1988:3-5
    [21]胡荣祖,史启祯等.热分析动力学[M]科学出版社,北京,2001:2-6

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