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특허 상세정보

Process and apparatus for handling synthetic gypsum

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) C04B-011/02    C04B-011/28    B28B-003/00   
미국특허분류(USC) 106/772; 106/638; 106/697; 106/775; 106/776; 106/785; 264/333; 425/421; 425/456
출원번호 UP-0710849 (2007-02-26)
등록번호 US-7776150 (2010-09-06)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    McNair Law Firm, P.A.
인용정보 피인용 횟수 : 0  인용 특허 : 25

Method and apparatus for converting wet synthetic gypsum from a flue desulphurization process (FGD) to easily handled and metered briquettes by mixing a hydraulic additive such as by-pass dust from a cement kiln with synthetic gypsum and allowing the heat from the resulting hydraulic reaction to reduce the water content of the mixture to a formable consistency without adding external heat to the mixture as it is formed into briquettes.


What is claimed is: 1. A process for preparing and handling synthetic gypsum for cement production and like uses comprising the steps of: a) providing synthetic gypsum in a form consisting essentially of gypsum having a paste-like consistency; b) adding sufficient hydraulic active additive to said gypsum to initiate a hydraulic exothermic reaction to evaporate water in said gypsum; c) allowing said reaction to continue until the surface water on the mixture has been reduced to a level at which the mixture is formable; d) compacting said gypsum when the ...

이 특허에 인용된 특허 (25)

  1. Ishida Nobumasa (Nagoya JPX) Yamada Yasuo (Nagoya JPX) Jinno Hideki (Aichi JPX). Gypsum moldings as building materials and methods manufacturing the said gypsum moldings. USP1980124239716.
  2. Anderson Daniel D.. Handling system for agglomerable materials. USP2000086098851.
  3. Li, Guanshu; Hornain, Hugues; Couturier, Jean. Hydraulic binder resulting from mixing a sulfate binder and a binder comprising the mineral compound C4A3{overscore (S)}. USP2004056730162.
  4. Murray Ransom James (Gravesend EN) Brown Arthur William (London EN). Hydraulic cements. USP1977084042408.
  5. Piasecki Robert J. ; Kingston Larry W.. Method and apparatus for continuously calcining gypsum. USP2000076083465.
  6. Logan, Terry J.; Faulmann, Ervin L.. Method for disinfecting and stabilizing organic wastes with mineral by-products. USP2004066752848.
  7. Ianniello, Peter J.; Topp, Mark; Johnson, Tracy R.. Methods and facilities for producing revenue from gypsum-based refuse sites. USP2005016846131.
  8. Logan, Terry J.; Faulmann, Ervin L.. Methods for controlling ignitability of organic waste with mineral by-products. USP2003126666154.
  9. Cheung Josephine H.. Process for improving grinding of cement clinker in mills employing rollers. USP2001046213415.
  10. Koslowski Thomas J. (Aachen DEX). Process for making calcium sulfate alpha-hemihydrate from calcium sulfate dihydrate. USP1991055015450.
  11. Nayak, Bansidhar; Misra, Vibhuti Narayan. Process for manufacturing of high iron hydraulic cement clinker. USP2004066752865.
  12. Mori Shigejiro (Kawasaki JA) Uchikawa Hiroshi (Funabashi JA) Uchida Shunichiro (Tokyo JA). Process for manufacturing rapid hardening portland cement clinker. USP1977064028126.
  13. Moisset Jacques (L\Isle-sur-la-Sorgue FRX) Petit Alain (Montelimar FRX). Process for preparation of purified calcium sulfate in an aqueous medium. USP1992125173284.
  14. Roth Timothy J. (Allentown PA) Gagliardi Carmine R. (Emmaus PA) Welliver William R. (Ship Bottom NJ). Process for producing gypsum flake from flue gas desulfurization. USP1994115362471.
  15. Jeffrey J. Konczak. Process for recycling gypsum-based waste material into readily crushable members for use in the manufacture of cement and crushable members formed thereby. USP2002106471767.
  16. Hukkanen Pentti,FIX. Process for the bleaching of pigments. USP2001086270564.
  17. Huller Rolf (Iphofen DEX) Knauf Alfons (Siersburg DEX) Wirsching Franz (Iphofen DEX). Process for the manufacture of lump calcium sulfate. USP1979114173610.
  18. Kirk Donald W. (Dept. of Chemical Engineering & Applied Chemistry ; University of Toronto Toronto CAX M5S 1A4 ) Tong Shitang (Dept of Chemical Engineering ; Wuhan Iron & Steel University Wuhan ; Hube. Process for the production of alpha hemihydrate calcium sulfate from flue gas sludge. USP1996105562892.
  19. Ferraris Chiara F. (Columbia) Gartner Ellis M. (Silver Spring) Myers David F. (Columbia MD). Processing additive for high-pressure roll press process of forming finish grind cement. USP1993045203512.
  20. Buschmann John C. (Columbia MD) Rasmussen Elizabeth L. (Hoth PA DKX) Webster William C. (Norristown PA) Veltman Preston L. (Severna Park MD). Shaped cementitious products. USP1983034377414.
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  25. Ianniello, Peter J.; Topp, Mark; Johnson, Tracy R.. Waste containment and processing facilities formed contemporaneously with the disposal of mineral refuse, and related methods. USP2005036860680.