Improved ceramic foam filter for better filtration of molten iron
A technology of ceramic filtration and filter materials, applied in the direction of ceramic products, filtration separation, application, etc., can solve problems that no one has discovered
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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 , which 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] [0049] The a...
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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