本设计采用拜耳法流程处理一级品硬铝土矿，设计的任务是设计年产量为300

本设计采用拜耳法流程处理一级品硬铝土矿，设计的任务是设计年产量为300万吨的氧化铝分解车间。设计的内容包括：厂址的选择、生产方法和生产流程的选择与论证、主要经济技术指标的选择与论证、全厂物料平衡计算、分解车间工艺流程的选择与论证、分解主体设备的选择与论证、经济技术分析和环境保护说明。
设计中选取论证的主要技术经济指标是：
1) 石灰添加量为干铝土矿的8%
2) 循环母液苛性碱浓度为240 g/L，苛性比值取为3.0
3) 溶出液苛性比值取1.55，溶出赤泥的A/S=1.35，N/S=0.3
4) 稀释矿浆苛性碱浓度为150 g/L
通过以上设计工作，确定本设计的氧化铝分解车间工艺和Ф14×30.4m规格的平底螺旋桨叶搅拌的机械分解槽进行生产，可达到设计要求。

結果 (英文) 1:

This design uses the Bayer process bauxite, the first hard design task decomposition workshop is designed with an annual output of 3 million tonnes of alumina. Designs include: site selection, selection and demonstration of production processes and production methods, selection and demonstration of major economic and technical indicators, plant-wide mass balance calculations, decomposition decomposition workshop process choice and feasibility studies, economic and technological analysis of main equipment selection and justification, description and environmental protection.Design of the main technical and economic indicators of selecting demonstration are:1) lime dosage of dry bauxite 8%2) circulating liquid caustic soda concentration of 240 g/l, LR took for 3.03) leaching liquor caustic ratio is 1.55, dissolution of red mud A/S=1.35,N/S=0.34) diluted slurry concentration of caustic soda, 150 g/lThrough the design of work confirmed the design decomposition workshop process of alumina, and ф 14x30.4m specifications of mechanical breakdown of the flat blades that stirred tank production can meet the design requirements.

結果 (英文) 3:

This design uses Bayer process to deal with the hard bauxite, the design of the task is to design annual output of 3000000 tons of alumina decomposition workshop. Design content includes: the choice of the site, production method and production process of selection and demonstration, main technical and economic indexes selection and demonstration, the material balance of the whole plant calculation, selection and demonstration of the workshop process of decomposition, decomposition of the main equipment selection and demonstration, economic technical analysis and environmental protection.
design argument selection of the main technical and economic indexes is:
1) lime adding amount of bauxite 8%
2) circulating mother liquor caustic concentration for 240 g / L, caustic ratio from 3.0
3) stripping liquid caustic ratio from 1.55, N/S=0.3
4 A/S=1.35 dissolution of red mud) of diluted slurry caustic concentration for 150 g/L
through the above design work, determine the design of the alumina decomposition workshop process and diameter of 14 x 30.4m specifications of flat spiral blade stirring mechanical decomposing tank production can meet the design requirements.