Fire-resistant gravity flow pouring material and method for making same
A castable and refractory technology, applied in the field of refractory castables, can solve the problems of increased cost, poor wear resistance, increased porosity, etc., and achieve the effects of increasing self-flow rate, reducing cost and high density
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[0013] Example 1: A method for preparing refractory self-flowing castable
[0014] Combine 53~55wt% alumina particles, 16~20wt% fine alumina powder, 5~8wt% fine corundum powder, 5~10wt% fused ceramsite sand, 3~4wt% pure calcium aluminate cement , 2~3wt% of silicon powder, 8~10wt% of α-Al 2 O 3 Micropowder and 0.10-0.13wt% of water reducing agent are mixed, and the mixture is uniformly stirred.
[0015] Among them: fused ceramsite sand is spherical particles, Al 2 O 3 78.53wt%, Fe 2 O 3 1.83wt%, the particle size is 2~0.6mm; the Al of alumina particles 2 O 3 The content is 88~89wt%, the particle size is 10~0.088mm, the Al of alumina fine powder 2 O 3 The content is 88~89wt%, the particle size is less than 0.088mm; the Al of corundum fine powder 2 O 3 The content is 94~95wt%, the particle size is less than 0.088mm; the specific surface area of pure calcium aluminate cement is ≥390cm 2 / g, refractoriness ≥1650℃; silicon powder SiO 2 ≥92wt%, Al 2 O 3 ≤1.5wt%, Fe 2 O 3 ≤2.0wt%, ignit...
Example Embodiment
[0017] Example 2: A method for preparing refractory self-flowing castable
[0018] Combine 43~45wt% of special grade alumina particles, 6~9wt% of fine alumina powder, 14~15wt% of corundum fine powder, 18~20wt% of fused ceramsite sand, 4~5wt% of pure alumina Calcium cement, 3~4wt% silica powder, 6~7wt% α-Al 2 O 3 It is prepared by mixing micropowder and 0.15-0.16% by weight of water reducing agent and stirring uniformly.
[0019] Among them: fused ceramsite sand is spherical particles, Al 2 O 3 78.53wt%, Fe 2 O 3 1.83wt%, the particle size is 2~0.6mm; the Al of alumina particles 2 O 3 The content is 78~84wt%, the particle size is 10~0.088mm, the Al of alumina fine powder 2 O 3 The content is 87~88wt%, the particle size is less than 0.088mm; the Al of corundum fine powder 2 O 3The content is 97~98wt%, the particle size is less than 0.088mm; the specific surface area of pure calcium aluminate cement is ≥390cm 2 / g, refractoriness ≥1650℃; silicon powder SiO 2 ≥92wt%, Al 2 O 3 ≤1.5wt...
Example Embodiment
[0021] Example 3: A method for preparing refractory self-flowing castable
[0022] Combine 48-50wt% special grade alumina particles, 9-10wt% special grade alumina fine powder, 8-9wt% fine corundum powder, 14-16wt% fused ceramsite sand, 8-10wt% pure alumina Calcium cement, 5~6wt% silica powder, 3~5wt% α-Al 2 O 3 Micropowder and 0.13-0.14wt% water reducing agent are mixed, and the mixture is uniformly stirred.
[0023] Among them: fused ceramsite sand is spherical particles, Al 2 O 3 78.53wt%, Fe 2 O 3 1.83wt%, the particle size is 2~0.6mm; the Al of alumina particles 2 O 3 The content is 86~88wt%, the particle size is 10~0.088mm, the Al of alumina fine powder 2 O 3 The content is 86~88wt%, the particle size is less than 0.088mm; the Al of corundum fine powder 2 O 3 The content is 96~98wt%, the particle size is less than 0.088mm; the specific surface area of pure calcium aluminate cement is ≥390cm 2 / g, refractoriness ≥1650℃; silicon powder SiO 2 ≥92wt%, Al 2 O 3 ≤1.5wt%, Fe 2 O 3...
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