Light microporous thermal insulation castable and preparation method thereof
A castable, lightweight technology, applied in the field of refractory materials, can solve the problems of low porosity, high pore diameter, low thermal conductivity, etc., and achieve the effect of increasing porosity, improving the control of pore size, and high stability
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Embodiment 1
[0030] Example 1: First, mix sodium dodecylbenzenesulfonate foaming agent and water at a mass ratio of 1:10 and put it into a foaming machine to stir for 5 minutes to foam, and then add 50 wt% of foaming agent equivalent Polyaluminum chloride was stirred for 2 minutes to form a stable microporous foam for later use; light microporous corundum particles with a particle size of 0.088-8mm, corundum fine powder with a particle size of 0.009-0.088mm, alumina fine powder with a diameter of <0.009mm and Alumina hydrate was mixed at 65 wt %, 12 wt %, 10 wt %, and 13 wt % respectively, and 0.1 wt % of the sum of aggregate and matrix mass was added to the polyethylene glycol-type water reducer CAMTMENT FS10 produced by BASF, Germany. Stir for 3 minutes with 10 wt% water of the aggregate and matrix mass, then add the prepared microcellular foam to the castable (the microcellular foam is 50v% of the aggregate and matrix volume) and stir for 1 minute Then add aggregate, matrix mass and 0.5...
Embodiment 2
[0032]Example 2: First, mix sodium dodecylbenzenesulfonate foaming agent and water at a mass ratio of 1:10 and put it into a foaming machine to stir for 5 minutes to foam, and then add 50wt% of the foaming agent quality Stir polyaluminum chloride for 2 minutes to form a stable microporous foam for later use; light microporous mullite particles with a particle size of 0.088-8mm, mullite fine powder with a particle size of 0.009-0.088mm, and mullite particles with a diameter of <0.009mm Alumina micropowder and pure calcium aluminate cement were mixed at 60 wt %, 15 wt %, 10 wt %, and 15 wt %, respectively, and 0.1 wt % sodium tripolyphosphate and 0.1 wt % of six Sodium metaphosphate and 10 wt % water were stirred for 3 minutes, then the prepared microcellular foam (microcellular foam is 30v% of the sum of aggregate and matrix volume) was added to the castable, stirred for 1 minute, and then 0.5wt % Stabilizer carboxymethyl cellulose and then stir for 2 minutes to obtain light mu...
Embodiment 3
[0034] Example 3: First, mix sodium dodecylbenzenesulfonate blowing agent with water at a mass ratio of 1:10 and put it into a foaming machine to stir for 10 minutes to foam, then add 50wt% of blowing agent quality Polyaluminum chloride is stirred for 3 minutes to form a stable microporous foam for later use; light microporous perlite particles with a particle size of 0.088-0.5mm, high-alumina fine powder with a particle size of 0.009-0.088mm, and a diameter of <0.009mm Alumina micropowder, silica micropowder and high alumina cement were mixed at 50wt%, 10wt%, 10wt%, 5wt%, 25wt%, respectively, and 0.2wt% tripolyphosphoric acid of aggregate and matrix mass was added Sodium and 15wt% water of aggregate and matrix mass were stirred for 5 minutes, then the prepared microcellular foam (microcellular foam was 30v% of the sum of aggregate and matrix volume) was added to the castable and stirred for 2 Minutes later, add 1wt% stabilizer carboxymethyl cellulose and stir for 2 minutes to...
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