VERFAHREN ZUR HERSTELLUNG VON FEUERFESTEN KOMPOSITPARTIKELN UND VON SPEISERELEMENTEN FÜR DIE GIEßEREIINDUSTRIE, ENTSPRECHENDE SPEISERELEMENTE UND VERWENDUNGEN

    公开(公告)号:EP3383565A1

    公开(公告)日:2018-10-10

    申请号:EP16804802.3

    申请日:2016-12-01

    IPC分类号: B22C1/20

    摘要: Disclosed is a method for producing a feeder element for the foundry industry, comprising the following steps: (a) producing composite particles which have a grain size of less than 2 mm, determined by means of screening, in a matrix encapsulation method, comprising the following steps: (a1) producing drops of a suspension from at least the following start materials: (i) one or more refractory substances chosen from the group consisting of refractory solids and precursors for refractory solids, (ii) one or more density-reducing substances chosen from the group consisting of light-weight fillers which have a respective bulk density in the range of 10 to 350 g/l, blowing agents and pyrolyzable fillers, (iii) a solidifiable fluid as continuous phase; (a2) solidifying the solidifiable fluid so that the drops harden to form hardened drops, and the refractory substance(s) and the density-reducing substance(s) are encapsulated in the hardening continuous phase; (a3) treating the hardened drops so that said composite particles result; (b) mixing the composite particles produced in step (a) with a binding agent and, optionally, further components to form a feeder mass; (c) shaping and curing of the feeder mass to form a feeder element. In addition, disclosed is the use of a matrix encapsulation method for producing composite particles and the use of sealed composite particles and a method for producing refractory composite particles and the use of same.