A METHOD OF PRODUCING FILLER
    3.
    发明申请

    公开(公告)号:US20180112360A1

    公开(公告)日:2018-04-26

    申请号:US15562943

    申请日:2016-03-31

    申请人: Stora Enso OYJ

    摘要: The invention provides a method of producing a filler comprising calcium carbonate (PCC), preferably to be used in paper or paper board production or in fibre based composites. The method of the invention comprises the steps of; —providing fly ash generated in paper or paper board production; —fractionating said fly ash in at least one step, whereby a coarser fraction is separated from a finer fraction; —forming a suspension of said coarser fraction; —adding carbon dioxide to said suspension to form precipitated calcium carbonate. The method of the invention avoids problems with high amounts of arsenic and heavy metals in the production of filler comprising PCC, when using ash generated in paper or paper board production as a raw material. It has been shown that harmful elements, such as arsenic and heavy metals, are primarily accumulated in the finer fractions of the fly ash. Thus, by using the coarser fraction in the step of carbonation, the amount of arsenic and heavy metals in the final product is reduced.

    PROCESS FOR MANUFACTURING HIGH SOLIDS SUSPENSIONS OF MINERAL MATERIALS
    9.
    发明申请
    PROCESS FOR MANUFACTURING HIGH SOLIDS SUSPENSIONS OF MINERAL MATERIALS 有权
    制备高浓度矿物材料悬浮液的方法

    公开(公告)号:US20130174994A1

    公开(公告)日:2013-07-11

    申请号:US13698296

    申请日:2011-05-26

    IPC分类号: C08K3/26

    摘要: The present invention relates to a process for manufacturing high solids aqueous suspensions of mineral materials comprising the steps of providing at least one mineral material, preparing an aqueous suspension comprising the at least one mineral material, grinding the resulting aqueous suspension, centrifuging the ground aqueous suspension, and concentrating the centrifuged product of step d) by flash cooling; the high solids aqueous suspension of mineral materials obtained by this process, as well as the use thereof.

    摘要翻译: 本发明涉及一种用于制造矿物材料的高固含量水悬浮液的方法,包括以下步骤:提供至少一种矿物材料,制备包含至少一种矿物材料的水性悬浮液,研磨所得水性悬浮液,离心研磨的水悬浮液 ,并通过闪蒸冷却浓缩步骤d)的离心产物; 通过该方法获得的矿物材料的高固含量水悬浮液及其用途。