High-strength calcium hexa-aluminate light heat insulation material and preparation method thereof
A lightweight thermal insulation, calcium hexaaluminate technology, applied in the field of lightweight refractory materials, can solve the problems of easy cracking of products, environmental pollution, high temperature performance effects of products, etc., and achieves low thermal conductivity, low bulk density, and uniform distribution. Effect
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[0025] Example 1
[0026] A high-strength calcium hexaaluminate lightweight heat insulation material and a preparation method thereof. With 70~73wt% Al 2 O 3 Fine powder, 7~8wt% ρ-Al 2 O 3 Micropowder and 20~22wt% nano-CaCO 3 As the raw material, add 0.05~0.10wt% water reducing agent and 68~80wt% water of the raw material, and mix for 30~55min to obtain a premix; then add foam to the premix, and add the foam in the premix The amount is 0.1~0.4L per kg of raw materials, mix for 3~8 minutes, cast into shape, and dry naturally; then bake at 90~110℃ for 24h, and keep at 1430~1480℃ for 3~6h to obtain high strength six Calcium aluminate lightweight insulation material.
[0027] In this embodiment: Al 2 O 3 The fine powder is fused white corundum fine powder; the water reducing agent is sodium hexametaphosphate.
[0028] The high-strength calcium hexaaluminate lightweight heat-insulating material prepared in this example is tested: the bulk density is 0.48~0.60g / cm 3 ; Thermal conductivit...
Example Embodiment
[0029] Example 2
[0030] A high-strength calcium hexaaluminate lightweight heat insulation material and a preparation method thereof. With 73~76wt% Al 2 O 3 Fine powder, 6~7wt% ρ-Al 2 O 3 Micropowder and 18-20wt% nano-CaCO 3 As raw materials, add 0.10~0.15wt% water reducing agent and 56~68wt% water of the raw materials, mix for 55~80min to obtain a premix; then add foam to the premix, and add the foam in the premix The amount is 0.4~0.8L per kg of raw materials, mix for 3~8 minutes, cast and form, and dry naturally; then bake at 90~110℃ for 24h, and keep it at 1480~1530℃ for 3~6h to obtain high strength six Calcium aluminate lightweight insulation material.
[0031] In this embodiment: Al 2 O 3 The fine powder is sintered corundum fine powder; the water reducing agent is a lignin-based water reducing agent.
[0032] The high-strength calcium hexaaluminate lightweight heat insulation material prepared in this example has been tested: the bulk density is 0.35~0.52g / cm 3 ; Thermal c...
Example Embodiment
[0033] Example 3
[0034] A high-strength calcium hexaaluminate lightweight heat insulation material and a preparation method thereof. With 76~79wt% Al 2 O 3 Fine powder, 5~6wt% ρ-Al 2 O 3 Micropowder and 16~18wt% nano-CaCO 3 As raw materials, add 0.15~0.20wt% water reducing agent and 44~56wt% water of the raw materials, mix for 80~105min to obtain a premix; then add foam to the premix, and add the foam in the premix The amount is 0.8~1.2L per kg of raw materials, mixed for 3~8 minutes, poured into shape, and naturally dried; then bake at 90~110℃ for 24h, and keep at 1530~1570℃ for 3~6h to obtain high strength six Calcium aluminate lightweight insulation material.
[0035] In this embodiment: Al 2 O 3 The fine powder is industrial alumina fine powder; the water reducing agent is sodium tripolyphosphate.
[0036] The high-strength calcium hexaaluminate lightweight heat insulation material prepared in this example has been tested: the bulk density is 0.24~0.42g / cm 3 ; Thermal conduc...
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