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Advanced mixing and technological achievements in the design of

399l049901 # 2 # 3 # Average 06979069850397705980 layer thrust from the digestion and absorption of Robin stirred technology, we have the same specifications, mixing media were the same, but the stirring device lanyards and long thin leaves spiral-type stirred tank were installed power compared in Table 2 . Can be seen from Table 2, the use of HPM stirred technology research designed to digest mixing tank installed power than lanyards Stirred Tank installed power savings of 30% to 40%, showing that both the HPM series impellers or from saving energy consumption side effects from mixing lanyards stirrer has incomparable advantages. 6355OOOO6O43 such as d 3233OOOO8227 ¨ nail nail 26721O11O8O6s} ¨ * 24. Light Metals 1,[link widoczny dla zalogowanych], 2005 Application of digestion and absorption of Robin propeller blades and amplify the formula of mutual influence, and further analysis of the company's Inte Ekato Bu prop propeller,[link widoczny dla zalogowanych], Intermig other impeller blade, the blade was found between amplification and affect each other not only for Robin's paddle in the HPM, and also for Interprop and Interrnig paddle paddle, design methods and formulas are also applicable. The long-term use also found Interprop stirring paddle and Intermig paddle paddle even better results than HPM, and manufacturing easier. Before 2000, the design selection of HPM paddle stirred tank. HPM radial blades when production became distorted, manufacturing is more complex; since 2000, when the design began to use Interprop stirred tank paddle. Curvature of the main volume is not only distort the leaf, forming a simple low cost, factory prepared to accept. Oar or paddle design concept interprop 12 meters several hundred sets of specifications paddle mixing tank, running in good condition and the results are obvious,[link widoczny dla zalogowanych], both have been successful. For the alumina plant has brought huge economic and social benefits. References: [1], chemical equipment design book, mixing equipment design [M]. Shanghai Science and Technology Press, 1985,11 [2], long thin leaves impeller research and development of generic and comprehensive report [R]. Mg Design and Research Institute of Shenyang. 1997. [3) Mechanical Design Manual [M] (third edition). Chemical Industry Press, 1993,5. [4] Ding Xu Huai, Zhou Li. Liquid mixing [M]. Chemical Industry Press, 1983 [5] J. Y. Oldshue. FluidMixingTechnologyMcGraw-HillPubCo. NeWYork. 19 835 Conclusion Since 1999, in a number of projects have used HPM ● ● ● ● ● ● ● ● ● ● ● q ● ● ● ● ● ● ● ● A ● I. '●' ● ● '● ● ◆' ● _. _. '● I. '~ ● one. . ● ●. . ● ... ● ... ... ● (on the next page 16) we described the general industrial materials on the chemical composition of sodium silicate is roughly: Na20 ・ Al2O3 ・ 1.7SIO2 ・ nH2O contrast. Calculated according to material composition of A / S = 1_0, N / S = 0.608. We use silicone residue before and after activation A / S, N / S compared with the theoretical value. After activation A / s lower, N / S increased. Clear from the comparison between the conclusions can be drawn as follows: The silica residue after the activation process. Pressure cook the pure silicate of sodium silicate in the composition is clearly increased. Significantly reduced the loss of alumina back. Increased activity of the silicon residue,[link widoczny dla zalogowanych], equipment capacity and control targets in the basic situation has not changed, the pressure to cook off the depth of silicon is greatly improved. In the absence of activation technology used before the time off during normal operation liquid silicon A / S for the 450 or so. Normal operation after the activation technique using a silicone fluid off A / S is 550 or more. Greatly reduce the burden of secondary desiliconization, but will also reduce the loss of the second off the amount of alumina silica. 5 Conclusion (1) liquor by evaporation of seed activation of silicon slag, in theory is feasible. (2) from the factory's operating results, despite the unsatisfactory control conditions, but also to obtain a silicon residue A / S reduced the amount of silicon solution after removal index of silicon increases the effect. (3) the process of silicon process control is the key to the activation of slag. The process control of the key conditions for the free caustic concentration (ie, the ratio must have a high caustic solution), reaction temperature, reaction time and mixing intensity. References: (1] Mei Jianshan eds. Alumina production process (M] Nonferrous Metals Industry Technical School Textbook Pl16 (1990 年 4 months). (Edited by Zhang Wenjun)

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