Invention Application
US20170050883A1 Process and Apparatus for Manufacture of Portland Cement 审中-公开
波特兰水泥制造工艺及装置

  • Patent Title: Process and Apparatus for Manufacture of Portland Cement
  • Patent Title (中): 波特兰水泥制造工艺及装置
  • Application No.: US15039693
    Application Date: 2014-11-19
  • Publication No.: US20170050883A1
    Publication Date: 2017-02-23
  • Inventor: Mark Sceats
  • Applicant: Calix Ltd.
  • Applicant Address: AU Pymble, New South Wales
  • Assignee: Calix Ltd.
  • Current Assignee: Calix Ltd.
  • Current Assignee Address: AU Pymble, New South Wales
  • Priority: AU2013904639 20131129
  • International Application: PCT/AU2014/001054 WO 20141119
  • Main IPC: C04B7/43
  • IPC: C04B7/43
Process and Apparatus for Manufacture of Portland Cement
Abstract:
A method of manufacture of Portland cement clinker is described in a dry process that captures the carbon dioxide emitted from the calcination of carbonate minerals, principally limestone. The process uses an indirectly heated, counter-flow reactor to pre-heat and calcine the cement meal to produce a separate calcined meal and carbon dioxide gas stream, with external heat being provided by the combustion of a secondary fuel stream with pre-heated air. This calcined meal is injected into the conventional rotary kiln, where the hot flue gas from combustion of the primary fuel with pre-heated air is used to fuse, react and sinter the powders to form granules of cement clinker. The clinker and carbon dioxide streams are cooled by the air pre-heaters.
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