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    • 1. 发明授权
    • Method for recovering foundry sand by roasting
    • 通过焙烧回收铸造砂的方法
    • US5299618A
    • 1994-04-05
    • US859316
    • 1992-05-28
    • Pio Fumagalli
    • Pio Fumagalli
    • B22C5/00B22C5/08
    • B22C5/08F23G2209/24F23L2900/07005Y02E20/344Y10S241/10
    • The method permits recovery of spent foundry sand for reuse by eliminating, by combustion, the organic and carbon substances with which the spent sand is impregnated; spent sand, after grinding to a uniform grain size, is placed into a cylindrical container (2) inclined with respect to the vertical and rotated slowly (4-6 revolutions per minute); then, a stream of oxygen is blown into the base of the container through a distributor (5) which uniformly distributes it into the spent sand mass (20), and local combustion is initiated on the surface of the sand mass, at the top of container, by a burner (31); finally the burner is extinguished whilst the delivery of the oxygen stream is maintained and the combustion proceeds and feeds itself by the effect of a progressive descent of the flame front (30) towards the base of the container until complete destruction of the organic and carbon substances contained in the sand has taken place.
    • PCT No.PCT / IT90 / 00096 Sec。 371日期:1992年5月28日 102(e)日期1992年5月28日PCT提交1990年11月23日PCT公布。 出版物WO91 / 08068 日期1991年6月13日。该方法允许通过消除用于浸渍废砂的有机和碳物质来消除废旧砂轮的再利用。 经研磨至均匀粒度的废砂放置在相对于垂直方向倾斜并旋转缓慢(4-6转/分钟)的圆柱形容器(2)中; 然后,通过将均匀分配到废砂体(20)中的分配器(5)将氧气流吹送到容器的基部中,并且在砂体的表面上开始局部燃烧 容器,通过燃烧器(31); 最后,燃烧器熄灭,同时保持氧气流的输送,并且燃烧进行并且通过火焰前沿(30)逐渐下降到容器底部的作用进入自身,直到完全破坏有机和碳物质 包含在沙子里已经发生了。