Patent ID: 8869993
Filing Date: 2014-10-28
Classification: B01D,C04B,C22B,Y02P

Abstract:
1. A filter for filtering molten metal, characterized in that the filter comprises a refractory material, a binder and an additive, wherein the refractory material is bonded to an open cell porous material through the binder to shape by sintering wherein the weight ratio of the refractory material to the binder is 20˜45 wt % of the refractory material to 52˜78 wt % of the binder, the total contents of the refractory material, the binder and the additive amount to 100%; the binder includes a carbon-based material and a binding material, wherein the carbon-based material is selected from carbon, asphalt, tar, or synthetic asphalt, the binding material is selected from alumino silica gel or silica sol; the refractory material is one or more selected from the group consisting of mullite, corundum or spinel.