ZINC PRODUCTION METHOD USING ELECTRIC FURNACE DUST AS RAW MATERIAL

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United States of America Patent

APP PUB NO 20160215407A1
SERIAL NO

14915811

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A zinc production method including a chlorination step 101 at which crude zinc chloride vapor 3 and an oxygen gas 2 are obtained by bringing electric furnace dust 1 containing zinc oxide or secondary dust 1 generated at the time of reducing the electric furnace dust in a reduction furnace into contact with a mixed gas containing a chlorine gas 8 and an oxygen-containing gas 10, converting a zinc oxide component in the electric furnace dust 1 or the secondary dust 1 into zinc chloride, and vaporizing the zinc chloride. The zinc production method further includes purification steps 102, 104, and 105 at which a zinc chloride component contained in the crude zinc chloride vapor 3 is separated from components 5 and 7 other than zinc chloride contained in the crude zinc chloride vapor 3 to obtain a purified zinc chloride melt 6, and an electrolysis step 103 at which the purified zinc chloride melt 6 is electrolyzed to obtain a zinc melt 9 and the chlorine gas 8.

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Patent Owner(s)

Patent OwnerAddress
KINOTECH SOLAR ENERGY CORPORATIONKAWASAKI-SHI KANAGAWA 212-0013

International Classification(s)

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  • 2014 Application Filing Year
  • C22B Class
  • 297 Applications Filed
  • 251 Patents Issued To-Date
  • 84.52 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances2014201520162017201820192020202120220255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
IOSAKI, Masaaki Nagareyama-shi, Chiba, JP 6 4
MORI, Shuji Fujisawa-shi, Kanagawa, JP 18 87
SATO, Yuzuru Sendai-shi, Miyagi, JP 19 314

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  • 2 Citation Count
  • C22B Class
  • 36.69 % this patent is cited more than
  • 9 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges51843101 - 1011 - 2091 - 100051015202530354045505560657075808590

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