| 摘要 |
<p>PURPOSE:To reduce defective filtration due to the release of a precoat and to improve the reliability of filtration by using a precoat filter element obtained by sintering crushed powder of sponge titanium and having specified porosity and average pore diameter. CONSTITUTION:The crushed powder of sponge titanium having about 10-500mum average grain diameter is sintered at 800-1200 deg.C to obtain a precoat filter element having 20-70% porosity and 0.5-50mum average pore diameter. The element is widely utilized in filtration, and diatomaceous earth, perlite, etc., are used as the filter aid. This element is firmly held to the precoat when the precoat is formed or even when the fluid is unexpectedly stopped in filtration, and the precoat is hardly released. Accordingly, defective filtration is reduced, and the reliability of filtration is remarkably improved.</p> |
