Granulation of Fine Powder

摘要

A mixture of fine powder including thorium oxide was converted to granulated powder by forming a first-green-body and heat treating the first-green-body at a high temperature to strengthen the first-green-body followed by granulation by crushing or milling the heat-treated first-green-body. The granulated powder was achieved by screening through a combination of sieves to achieve the desired granule size distribution. The granulated powder relies on the thermal bonding to maintain its shape and structure. The granulated powder contains no organic binder and can be stored in a radioactive or other extreme environment. The granulated powder was pressed and sintered to form a dense compact with a higher density and more uniform pore size distribution.

主权项

1. A process for granulating fine powder, comprising:
mixing a fine powder by dry mixing or we mixing, the fine powder comprising at least one radioactive compound, and thereafter forming a first-green-body from the mixed powder, heat treating the first-green-body to a high temperature to strengthen the shape and structure, forming granulated powder by crushing or milling the heat treated first-green-body, and filtering the granulated powder.