张鑫毕业实习报告

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1、贵州大学本科毕业论文（设计）第20页本科毕业论文（设计）毕业实习报告学院：材料与冶金学院专业：冶金工程班级：冶金081学号：080802110238学生姓名：张鑫指导教师：孙克萍2012年3月21日贵州大学本科毕业论文（设计）第20页目录前言··························································3第一章绪论···················································41.1实习目的···································

2、················41.2实习性质···················································41.3贵州铝厂概况·······································4第二章氧化铝生产工艺及流程··································52.1碱石灰烧结法生产氧化铝·····································5贵州大学本科毕业论文（设计）第20页2.1.1基本原理···························

3、························52.1.2烧结法生产氧化铝工序·········································62.1.3影响碳分过程的主要因素·······································82.2拜耳法生产氧化铝··········································102.2.1基本原理··················································102.2.2现代拜耳法的主要进展··········

4、······························102.2.3拜耳法生产氧化铝的基本流程··································112.3混联法生产氧化铝贵州大学本科毕业论文（设计）第20页···········································152.3.1混联法概述················································152.3.2混联法碱循环工艺···········································152

5、.3.3混联法的工艺点·············································162.3.4混联法结合并联法和串联法的优缺点·····························16第三章实习心得··············································18参考文献·················································19前言我国铝土矿资源的特点是高铝高硅的中低品位的一水硬铝石矿，采用的生产方法是烧结法和联合法，联合法中的拜耳法也不同于外

6、国处理三水硬铝石型铝土矿的拜耳法，所以，我国氧化铝生产与外国相比能耗高，成本高。贵州大学本科毕业论文（设计）第20页现阶段我国的氧化铝生产已经进入到一个崭新的阶段，更多氧化铝生产的新工艺和新技术得到了研发。拜尔法生产工艺为世界各国普遍采用，以三水铝石为原料的拜尔法生产，温度低、压强不高、流程简单，故能耗低、成本低。我国的一水硬铝石型铝土矿的溶出温度要260左右，相应的压强高达0．3MPa一0．4MPa．且溶出时间长达2h。若采用管道化溶出．需要更高温度．才能加速溶出和减少管道长度；或采用中间罐保温，将使流程复杂，设备投资大。同样是拜尔法．其能耗高于国外

7、产品。因此降低溶出温度、提高溶出速率成为降低拜尔法生产氧化铝成本的关键。为此，我们特意到中铝贵州分公司进行了一次毕业实习，进一步了解和学习烧结法生产氧化铝的新工艺。着重了解其生产设备，工艺流程环节，以及在节能减排等方面的优缺点。这些都将为后面的毕业设计打下基础，储备资料，以解决很多关键性的问题。第一章绪论1.1实习目的1.通过现场观察和技术人员的分析讲解，以实现理论知识与实践的结合，弥补理论学习的不足，巩固专业知识。2.进一步熟悉生产现场的环境，生产设备、原料、工艺流程、技术经济指标、生产控制、安全生产等方面的情况，为下一步工作打下基础。3.强化应用型

8、本科的实践操作能力，观察和思考的能力，分析和解决问题的能力。贵州大学本科毕业论文（设计）第20