Light slightly-closed hole corundum complex-phase refractory material and preparation method thereof
A refractory material and lightweight technology, which is applied in the field of lightweight micro-closed-cell corundum composite refractory materials and their preparation, can solve the problem that the lightweight materials are difficult to meet the requirements, the slag resistance performance is very different, and the slag diffusion channels are many. problems, to achieve the effects of good thermal shock stability, improved slag resistance, and strong slag erosion resistance
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Embodiment 1
[0021] Example 1: Preparation of lightweight micro-closed-cell corundum composite refractory material
[0022] 95-97 parts by weight of α-Al 2 o 3 Micropowder and 3-5 parts by weight of dolomite clinker are used as raw materials, plus 12-15 parts by weight of nano-alumina sol, dextrin of 10-15 parts by weight and ethanol of 30-40 parts by weight. The ball mill is mixed and wet-milled for 0.5-1 hour to obtain a slurry; then the slurry is placed in a mold, first placed at a room temperature of 15-25°C for 6-12 hours, and then kept at a constant temperature of 60-90°C for 6-12 hours. After 12 hours, demould; then dry the demoulded green body at 110-160°C for 24-30 hours, and keep it at 1900-2000°C for 2-4 hours to obtain light micro-closed-cell corundum composite phase refractory material.
[0023] The lightweight micro-closed-cell corundum composite refractory material prepared in this example is tested: the bulk density is 2.75-2.85g / cm 3 ; Closed porosity accounts for more...
Embodiment 2
[0024] Example 2: Preparation of lightweight micro-closed-cell corundum composite refractory material
[0025] 95-97 parts by weight of α-Al 2 o 3 Micropowder and 3 to 5 parts by weight of dolomite clinker are used as raw materials, plus 12 to 15 parts by weight of nano-alumina sol, 5 to 10 parts by weight of starch and 40 to 50 parts by weight of polyvinyl alcohol. The planetary ball mill was mixed and wet-milled for 0.1-0.6 hours to obtain a slurry; then the slurry was placed in a mold, first placed at a room temperature of 15-25°C for 6-12 hours, and then kept at a constant temperature of 60-90°C for 6 ~12 hours, demould; then dry the demoulded green body at 150-200°C for 30-36 hours, and keep it at 1800-1900°C for 3-5 hours to obtain light micro-closed-cell corundum complex phase refractories.
[0026] The lightweight micro-closed-cell corundum composite refractory material prepared in this example is tested: the bulk density is 2.80-2.88g / cm 3 ; Closed porosity accoun...
Embodiment 3
[0027] Example 3: Preparation of lightweight micro-closed-cell corundum composite refractory material
[0028] 95-97 parts by weight of α-Al 2 o 3 Micropowder and 3-5 parts by weight of dolomite clinker are used as raw materials, plus 8-12 parts by weight of nano-alumina sol, 10-15 parts by weight of chitin and 30-40 parts by weight of tert-butanol, Use a planetary ball mill to mix and wet grind for 0.5-1 hour to obtain a slurry; then put the slurry in a mold, first place it at room temperature of 15-25°C for 6-12 hours, and then keep it at a constant temperature of 60-90°C 6-12 hours, demould; then dry the demoulded green body at 110-160°C for 24-30 hours, and keep it at 1900-2000°C for 2-4 hours to obtain light micro-closed-cell corundum Composite refractories.
[0029] The lightweight micro-closed-cell corundum composite refractory material prepared in this example is tested: the bulk density is 2.80-2.85g / cm 3 ; Closed porosity accounts for more than 56% of the total p...
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