Graduate qualifying work Theme: Selection and calculating of zinc sulfate production technology

We physically and chemically divide industrial waste treatment into four stages.

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  We physically and chemically divide industrial waste treatment into four stages.
  
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  1. Absorption method - purification of liquid mixtures by washing.
  
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  2. Adsorption - washing of gas and dust wastes.
  
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  3. Chemisorption - washing of waste with chemically bound reagents.
  
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  4. Kabolitin method is the neutralization of the mixture from the gases by heat.
  

Conclusions

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  Technical zinc sulfate is produced by evaporating a solution of zinc sulfate in a fluidized bed furnace (BL).
  
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  The solution after cementitious purifications from cadmium in the cadmium production is fed to the filter press for filtering. The filtered solution is sent to a filler with a capacity of 70 m3. From the collection container, the gravity solution is periodically poured periodically as necessary into a 20 m3 supply tank. The tank is equipped with a level gauge for measuring the amount of solution. From the supply tank, the olution is pumped to the nozzles and sprayed into the furnace.
  
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  The jet of sprayed solution from the nozzles is directed into a fluidized bed consisting of granular zinc sulfate. The temperature in the fluidized bed is maintained within 240-2900 C due to the heat of the gases generated from the combustion of natural gas in the furnace.
  
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  The temperature under the hearth of the furnace 780-8600 C is regulated by the amount of natural gas supplied. To remove gases and water vapor, a vacuum of 5-10 mm water is maintained in the furnace. the column, which is created by a smoke exhauster installed at the end of the gas duct..
  

Zinc sulfate

Bibliography.

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  V.Ya. Zaitsev, E.V. Margulis "Metallurgy of lead and zinc." Textbook for high schools-M .: Metallurgy, 1986, 263p.
  
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  Yu.N. Matveev, V. S. Strizhko “Technology of metallurgical production”. Textbook for high schools.- M.: Metallurgy, 1986, 368p.
  
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  N.N. Sevryukov, B. A. Kuzmin, E. V. Chelishchev “General Metallurgy”, Moscow: Metallurgy, 1976, 568 pp.
  
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  S. S. Naboichenko, A. P. Ageev, A. P. Doroshkevich and others. “Processes and apparatuses of non-ferrous metallurgy”. Textbook for high schools. - Yekaterinburg: USTU, 1997, 648p.
  
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  A.P. Snurnikov "Zn-ka hydrometallurgy" 1982, 190p.
  
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  NP Diev, IP Hoffman “Metallurgy of lead and zinc”. Textbook for high schools. - Metallurgy, 1961, 390p.
  
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  N. Dobrev Combine of non-ferrous metals: stages of development of “Non-ferrous metals”. 2001 Number 12.
  
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  V.V. Geykhman, P.A. Kozlov, O.I.Reshetov et al. Firing of zinc concentrates with a distributed oxygen supply. "Non-ferrous metals." 2000 Number 5.
  
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  VVGeykhman, P.A. Kozlov, V.A. Lukyanchikov Improving the purification of gases from roasting of zinc concentrates. "Non-ferrous metals." 2000 Number 5.
  
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  A.A.Kolmakov, L.G. Sadilova, O.V. Sector "Calculations of technological processes in the metallurgy of lead and zinc": a training manual / KGATsMiZ.- Krasnoyarsk 1998, 120p.
  
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  V.S.Kokorin "Hardware and technological schemes for the design of production of heavy non-ferrous metals": guidelines for course and diploma design / KGATSMiZ.- Krasnoyarsk 1983, 47p
  

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