Preparation method of chemical vitrified perlite
A technology of chemical vitrified pearl and perlite is applied in the preparation of thermal insulation materials and chemical vitrified perlite, which can solve the problems of brittleness, high cost, complicated process of electric furnace vitrified perlite, etc., and reduce energy consumption. , the effect of low cost
Active Publication Date: 2012-09-12
浙江忆赫新材料有限公司
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Problems solved by technology
[0004] The invention provides a chemical vitrified perlite preparation method for the disadvantages of ordinary expanded perlite such as low strength, high water absorption rate, and fragility, as well as the complex process of electric furnace vitrified perlite, high energy consumption, and high cost.
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Embodiment 1-8
[0018] According to the formula in Table 1, pre-mix perlite and calcium stearate (powder) for 2-5 minutes, so that calcium stearate powder is evenly coated on the surface of perlite, and then add curing agent ( Example 1-5 is silicon phosphate, and Example 6-8 is sodium fluorosilicate), mix evenly, and then spray water glass (the modulus of water glass is 2.8 to 3.0) and fluorine-based The mixed liquid composed of waterproofing agent, wherein the weight ratio of water glass and waterproofing agent is 10:0.5-1, after mixing evenly, it is dried and dehydrated by microwave heating for 1-3min, the microwave frequency is 2450±50MHz, and the glass with waterproof layer formed on the surface is obtained Vitrified microbeads with a crystalline shell.
[0019] The microwave drying in this example can be replaced by heating at 100-150°C to the drying process of the vitrified microbeads, but the microwave drying makes the obtained product not easy to deform and crack, and the refractorin...
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The invention discloses a preparation method of chemical vitrified perlite. The preparation method aims at solving the problems that common expanded perlite has the defects of low strength, a high water absorption rate and frangibility and electric furnace-vitrified perlite has the defects of high process complexity, high energy consumption and high cost. The preparation method comprises the following steps of a, adding 2 to 5kg of calcium stearate into each cubic meter of perlite, mixing uniformly, adding 5kg of a curing agent into the mixture, and mixing uniformly, b, based on each cubic meter of perlite, injecting 20 to 60g of a mixed emulsion of sodium silicate and a waterproofing agent into the mixture obtained by the step a, wherein a weight ratio of sodium silicate and the waterproofing agent is 10: (0.5 to 1), mixing uniformly, and carrying out drying dehydration to obtain vitrified beads with vitreous crystal shells of which the surfaces are coated with waterproofing layers.
Description
technical field [0001] The invention belongs to the technical field of building materials, and relates to a method for preparing thermal insulation materials, in particular to a method for preparing chemically vitrified perlite. Background technique [0002] Vitrified microbeads, also known as vitrified perlite, is an acidic vitreous lava mineral (turpentine ore). After special technical treatment and production process, it becomes porous inside, vitrified and closed on the surface, and is in the form of spherical fine-diameter particles. , is a new type of inorganic lightweight thermal insulation material with high performance. Because the surface vitrification forms a certain particle strength, the physical and chemical properties are very stable, the aging resistance is strong, and it has excellent heat insulation, fire prevention and sound absorption performance. It is suitable for lightweight filler aggregate and heat insulation, fire prevention, sound absorption and he...
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Inventor 陈贤进
Owner 浙江忆赫新材料有限公司