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Improved ceramic foam filter for better filtration of molten iron

A filter material, ceramic filtration technology, applied in ceramic products, filtration separation, application, etc., can solve problems such as no one found

Active Publication Date: 2009-06-03
PORVAIR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] It has been demonstrated that the substitution of mullite for SiC should be avoided, and no one has previously found a suitable design for a binder that can be used with suitable mechanical properties both at room temperature and at elevated temperatures. properties of the filter material in the formulation of the

Method used

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  • Improved ceramic foam filter for better filtration of molten iron
  • Improved ceramic foam filter for better filtration of molten iron
  • Improved ceramic foam filter for better filtration of molten iron

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0044] The materials listed in Table 1 were used to prepare ceramic precursor compositions. In Table 1, the refractory aluminosilicate used was Mulcoa 60 available from C-E Minerals It has been ground to about 325 mesh. The colloidal silica used was obtained from the company Nyacol. The modified bentonite used was obtained from Wyo-Ben Company. The fumed silica used was obtained from C-E Minerals. The composition was fired at 1200°C for 30 minutes. Fumed silica can be used instead of fumed silica in order to improve the ability of porous ceramics in the fired state to be cut. The modulus of rupture measured at room temperature is reported in Table 2. The modulus of rupture measured at elevated temperature is reported in Table 3.

[0045] Table 1

[0046] Element weight% High temperature resistant aluminosilicate 54.50 Colloidal silica 21.00 Modified bentonite 0.75 Fumed silica 17.75 water 6.00

[0047] The average room tem...

Embodiment 2

[0054] In order to improve the interception ability and retention capacity for liquid slag, the composition was prepared according to the ingredients listed in Table 1, and additionally added 4% by weight of hollow organic spheres with a diameter of 80 microns. The resulting filter material was observed under a microscope, and its final microstructure is shown in figure 2 . When the liquid slag wets the mullite body, it is sucked into the micropores by capillary action.

Embodiment 3

[0056] Using the compositions provided in Table 4, filter materials were prepared under the same conditions as in Example 1. Using Mulcoa 70 available from C-E Minerals As a high temperature resistant aluminosilicate.

[0057] Table 4

[0058] Element weight% High temperature resistant aluminosilicate 54.5 Colloidal silica 21.0 Modified bentonite 0.8 Fumed silica 17.8 water 5.9

[0059] When the average relative density of the porous body is 14%, the measured average high temperature rupture modulus is 34 psi.

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Abstract

The present invention relates to a ceramic precursor and ceramic materila produced from the same, wherein the ceramic precursor is prepared therewith, with 35-70 wt % refractory aluminosilicate; 10-30 wt % colloidal silica; 0-2 wt% modified bentonite; 0-35 wt% fumed silica; 0-10 wt% pore formers and liquid.

Description

[0001] Cross References to Related Patent Applications [0002] This patent application claims priority to pending US Provisional Patent Application No. 60 / 706,577, filed August 9, 2005, which is incorporated herein by reference. This patent application is a continuation-in-part of pending U.S. Patent Application No. 11 / 389,841 filed March 27, 2006, which claimed the now-expired U.S. Provisional Patent Application No. 60 / 665,760, the priority of which is incorporated herein by reference. Background technique [0003] The present invention relates to an improved porous ceramic filter material. More particularly, the present invention relates to a porous ceramic filter material for filtering molten iron having sufficient mechanical properties to capture and retain liquid high FeO slags, other metal oxide slags, and other entrained particles. [0004] Most iron foundries use pressed or extruded mullite screens. Due to the tortuous fluid flow path of porous ceramic filter mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/20B01D71/02C04B35/185C04B35/66C04B35/18C04B38/06
CPCC04B2235/3418C04B38/0615B01D39/2093C04B2235/3232B01D2323/18C04B2235/3463C04B2235/727C04B2111/00793B01D71/024C04B2235/72C04B2235/77C04B35/185C04B2235/9676C04B2235/96C04B2235/349C04B2111/2084Y02P10/20C04B35/18C04B38/0074C04B38/0655C04B38/067
Inventor 鲁道夫·A·奥尔森莱昂纳德·S·奥布里F·迟克里斯托弗·J·普兰泰克迈伦·K·雷登戴维·P·哈克
Owner PORVAIR
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