Micro-porous mullite-silicon carbide multiphase fire resistant material and preparation method thereof
A refractory material and mullite technology, applied in the field of refractory materials, can solve the problems of poor corrosion performance of sulfur compounds, poor corrosion performance, poor corrosion resistance of gaseous alkali, chlorine and sulfur compounds, etc., and achieve excellent corrosion performance and thermal insulation performance. Good results
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Embodiment 1
[0034] A microporous mullite-silicon carbide composite refractory material and a preparation method thereof, the raw materials of the refractory material and their mass percentages are as follows (wherein, d represents the particle size, the same below):
[0035] 3mm>d≥1mm special-grade alumina particles 25-27%;
[0036] 1mm>d≥0.1mm super-bauxite particles 26-27%;
[0037] SiC particles with 1mm>d≥0.1mm 10~12%;
[0038] d≤0.074mm special grade bauxite fine powder 10~12%;
[0039] Andalusite fine powder with d≤0.088mm 8~10%;
[0040] Pyrophyllite fine powder with d≤0.088mm 3-5%;
[0041] α-Al 2 o 3 Micropowder 3~4%;
[0042] SiO 2 Micropowder 4~5%;
[0043] Guangxi white clay 5-6%;
[0044] Elemental Si powder 1-2%;
[0045] Al powder 1-1.5%.
[0046] The following additives are the percentages of the total mass of the above-mentioned raw materials:
[0047] Dextrin 1~2%;
[0048] Calcium lignosulfonate 0.4~0.6%;
[0049] Water 2-4%.
[0050] According to the respe...
Embodiment 2
[0058] A microporous mullite-silicon carbide composite refractory material and a preparation method thereof. The raw materials and mass percentages of the refractory material are as follows:
[0059] 3mm>d≥1mm special-grade alumina particles 28-30%;
[0060] 1mm>d≥0.1mm special grade alumina particles 24~25%;
[0061] 13-15% of SiC particles with 1mm>d≥0.1mm;
[0062] d≤0.074mm special grade bauxite fine powder 10~12%;
[0063] Andalusite fine powder with d≤0.088mm 6-8%;
[0064] Pyrophyllite fine powder with d≤0.088mm 2~4%;
[0065] α-Al 2 o 3 Micropowder 4~5%;
[0066] SiO 2 Micropowder 3~4%;
[0067] Guangxi white clay 4-5%;
[0068] Elemental Si powder 1-2%;
[0069] Al powder 1.5-2%.
[0070] Admixture in the present embodiment is identical with embodiment 1.
[0071] In the preparation steps of this embodiment, except for firing at 1250-1350° C. in step (5), the others are the same as in Embodiment 1.
[0072] The bulk density of the microporous mullite-sili...
Embodiment 3
[0074] A microporous mullite-silicon carbide composite refractory material and a preparation method thereof. The raw materials and mass percentages of the refractory material are as follows:
[0075] 3mm>d≥1mm special-grade alumina particles 26-28%;
[0076] 1mm>d≥0.1mm super-bauxite particles 25-26%;
[0077] SiC particles with 1mm>d≥0.1mm 11~13%;
[0078] d≤0.074mm special grade bauxite fine powder 13~15%;
[0079] Andalusite fine powder with d≤0.088mm 5~7%;
[0080] Pyrophyllite fine powder with d≤0.088mm 2~4%;
[0081] α-Al 2 o 3 Micropowder 3~4%;
[0082] SiO 2 Micropowder 3~4%;
[0083] Guangxi white clay 5-6%;
[0084] Elemental Si powder 2-3%;
[0085] Al powder 1-1.5%.
[0086] Admixture in the present embodiment is identical with embodiment 1.
[0087] In the preparation steps of this embodiment, except for firing at 1300-1400° C. in step (5), the others are the same as in Embodiment 1.
[0088] The bulk density of the microporous mullite-silicon carbide...
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