Potassium hexatitanate whisker heat insulating brick and production method thereof
A potassium hexatitanate whisker, thermal insulation technology, applied in the field of thermal insulation materials, can solve the problem that the thermal insulation effect of thermal insulation bricks is difficult to meet the strict requirements of industrial furnace energy-saving targets, and achieve good energy-saving effect, good thermal insulation effect, The effect of low thermal conductivity
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Embodiment 1
[0025] Insulation bricks are prepared by the following process:
[0026] 1) Mix potassium hexatitanate whiskers with a length of 60-80 μm, a diameter of 0.3-0.5 μm, and an aspect ratio of 150-200, alumina and cement with a particle size of 2-5 μm, and dry-roll for 15 minutes.
[0027] 2) Then add sodium carboxymethyl cellulose, water glass and water successively, continue rolling for 25 minutes, roll out, and shape the blank in the brick-making mold.
[0028] 3) Air-dry the above-mentioned insulating brick blanks for 48 hours, then put them into the furnace for roasting, the heating rate is 60°C / h, heat up to 500°C, keep warm for 15 hours, then cool down in the furnace, when the temperature reaches 280°C, take them out of the furnace and put them into the slow cooling pit to reach the temperature When it reaches 80°C, it is air-cooled to room temperature to obtain the required insulation brick. The composition of the insulation brick is shown in Table 1, and the thermal condu...
Embodiment 2
[0030] Insulation bricks are prepared by the following process:
[0031] 1) Mix potassium hexatitanate whiskers with a length of 60-80 μm, a diameter of 0.3-0.5 μm, and an aspect ratio of 150-200, alumina and cement with a particle size of 2-5 μm, and dry-roll for 20 minutes.
[0032] 2) Then add sodium carboxymethyl cellulose, water glass and water successively, continue rolling for 30 minutes, roll out, and shape the blank in the brick-making mold.
[0033] 3) Air-dry the above-mentioned insulating brick blanks for 72 hours, then bake them in the furnace at a heating rate of 40°C / h, heat them to a temperature of 600°C, keep them warm for 12 hours, and then cool them in the furnace. When it reaches 70°C, it is air-cooled to room temperature to obtain the required insulation brick. The composition of the insulation brick is shown in Table 1, and the thermal conductivity of the insulation brick is shown in Table 2.
Embodiment 3
[0035] Insulation bricks are prepared by the following process:
[0036] 1) Mix potassium hexatitanate whiskers with a length of 60-80 μm, a diameter of 0.3-0.5 μm, and an aspect ratio of 150-200, alumina and cement with a particle size of 2-5 μm, and dry-roll for 18 minutes.
[0037] 2) Then add sodium carboxymethyl cellulose, water glass and water successively, continue rolling for 28 minutes, roll out, and shape the blank in the brick-making mold.
[0038] 3) Air-dry the above-mentioned insulating brick blanks for 48 hours, then bake them in the furnace at a heating rate of 50°C / h, heat them to a temperature of 550°C, keep them warm for 13 hours, and then cool them in the furnace. When it reaches 90°C, it is air-cooled to room temperature to obtain the required insulation brick. The composition of the insulation brick is shown in Table 1, and the thermal conductivity of the insulation brick is shown in Table 2.
[0039] The composition of table 1 insulation brick (mass fr...
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