TARGETED ADDITION OF GRINDING AIDS DURING A GRINDING PROCESS

    公开(公告)号:US20240308906A1

    公开(公告)日:2024-09-19

    申请号:US18264235

    申请日:2021-02-05

    IPC分类号: C04B7/52

    CPC分类号: C04B7/527

    摘要: The present invention concerns an improved method of grinding or milling fresh feed (i.e. crushed yet not milled clinker (with or without additions)), using two different grinding agent systems added at specific locations of the cement grinding mill, preferably at two different locations of a cement ball mill, depending on the particle size or fineness of the material to be ground, to reduce the energy needed to achieve a targeted cement fineness or increase the fineness of the cement at constant energy consumption.

    METHOD OF CALCINING A CLAY MATERIAL
    5.
    发明公开

    公开(公告)号:US20240101477A1

    公开(公告)日:2024-03-28

    申请号:US18257468

    申请日:2021-12-14

    IPC分类号: C04B7/43 C04B7/13 C04B7/52

    CPC分类号: C04B7/434 C04B7/13 C04B7/52

    摘要: A method of calcining a clay material for use as a supplementary cementitious material, includes providing a raw clay material, optionally drying the raw clay material, granulating the raw clay material in order to obtain raw clay granules, calcining the raw clay granules to obtain calcined clay granules, and grinding the calcined clay granules to obtain a pulverulent supplementary cementitious material.

    Process for reforming the fly ash and apparatus therefor

    公开(公告)号:US11407683B2

    公开(公告)日:2022-08-09

    申请号:US16978578

    申请日:2019-03-05

    摘要: A process for reforming the fly ash, including the heating step that heats a raw fly ash powder containing the unburned carbon at a temperature of 780 to 1000° C. to decrease the amount of the unburned carbon contained in the raw fly ash powder; the classifying step that introduces the heat-treated fly ash containing the unburned carbon in decreased amounts obtained through the heating step into a classifying apparatus in the state of being heated at a high temperature so as to separate the fly ash into a coarse powder and a fine powder; the fine powder recovering step that recovers the fine powder of the heat-treated fly ash obtained through the classifying step by using a dust-collecting apparatus; and the milling step that mills the coarse powder of the heat-treated fly ash obtained through the classifying step until a 45 μm sieve residue becomes not more than 34% by mass, and then recovers the milled powder.