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Foam glass used for continuous furnace thermal insulation layer, and preparation method thereof

A foam glass and insulation layer technology, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve problems such as uneven foaming, affecting the strength of foam glass, reducing the strength and thermal conductivity of foam glass, and achieving various The effect of excellent performance

Inactive Publication Date: 2018-11-23
TONGFU HEAT TREATMENT KUNSHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although foam glass has the above-mentioned advantages, due to the existence of a large number of small holes in the finished foam glass, the strength of the foam glass is seriously affected, and the foaming of the foam glass is prone to uneven foaming during the foaming process, resulting in different pore sizes in the finished product. The strength and thermal conductivity of foam glass are greatly reduced, so that it cannot be used as an insulation material on a large scale

Method used

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  • Foam glass used for continuous furnace thermal insulation layer, and preparation method thereof
  • Foam glass used for continuous furnace thermal insulation layer, and preparation method thereof
  • Foam glass used for continuous furnace thermal insulation layer, and preparation method thereof

Examples

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Embodiment 1

[0025] A kind of foam glass for continuous furnace insulation layer, its preparation method is:

[0026] Step 1, sending waste glass as raw material, foaming agent calcium carbonate, fluxing agent sodium fluorosilicate, and stabilizing agent sodium phosphate into a ball mill for ball milling, and the particle fineness after ball milling is 150 mesh to obtain a mixture. Among them, the waste glass is flat glass powder, made of SiO 2 、Al 2 o 3 , CaO, MgO, Na 2 O, K 2 O composition, and SiO 2 、Al 2 o 3 , CaO, MgO, Na 2 O, K 2 The weight content of O is 75%, 2.5%, 3%, 4.5%, 10%, 5% respectively; the mass percentages of calcium carbonate, sodium fluorosilicate and sodium phosphate are 1%, 6%, 7%, respectively.

[0027] Step 2, put the ground mixture into a high temperature resistant mold, preheat at 450°C for 25 minutes, then raise the temperature to 850°C for foaming, and keep it warm for 40 minutes, then cool down to 530°C for annealing, keep it warm for 60 minutes, and ...

Embodiment 2

[0030] A kind of foam glass for continuous furnace insulation layer, its preparation method is:

[0031] Step 1, sending waste glass as raw material, foaming agent calcium carbonate, fluxing agent sodium fluorosilicate, and stabilizing agent sodium phosphate into a ball mill for ball milling, and the particle fineness after ball milling is 150 mesh to obtain a mixture. Among them, the waste glass is flat glass powder, made of SiO 2 、Al 2 o 3 , CaO, MgO, Na 2 O, K 2 O composition, and SiO 2 、Al 2 o 3 , CaO, MgO, Na 2 O, K 2 The weight content of O is 75%, 2.5%, 3%, 4.5%, 10%, 5% respectively; the mass percentages of calcium carbonate, sodium fluorosilicate and sodium phosphate are 0.8%, 6%, 7%, respectively.

[0032] Step 2, put the ground mixture into a high temperature resistant mold, preheat at 450°C for 30 minutes, then raise the temperature to 860°C for foaming, and keep it warm for 45 minutes, then cool down to 500°C for annealing, keep it warm for 50 minutes, an...

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Abstract

The invention discloses a preparation method for foam glass used for a continuous furnace thermal insulation layer. The preparation method comprises the following steps: S1: sending raw material wasteglass, 0.5-1wt% of foaming agent calcium carbonate, 5-7wt% of fluxing agent sodium fluosilicate and 6-7wt% of stabilizer sodium phosphate into a planetary ball mill to be grinded to obtain mixed materials; S2: sending the grinded mixed materials into a high temperature resistant die, preheating at the temperature of 450DEG C for 25-30min, raising the temperature to 850-860DEG C to be foamed, keeping the temperature for 40-45min, cooling to 520-530DEG C to be annealed, keeping the temperature for 50-60min, finally, cooling to the room temperature along with the furnace, and thus obtaining thefoam glass. The prepared foam glass has even aperture, most holes are closed holes, average aperture is about 1.5mm, density is 0.88g / cm<3>, compressive strength is 5.78Mpa, a heat conductivity coefficient is 0.168W / m<2>.K, each piece of performance is excellent, and the use requirement of the foam glass can be met.

Description

technical field [0001] The invention belongs to the field of foam glass, and in particular relates to a foam glass for a continuous furnace insulation layer and a preparation method thereof. Background technique [0002] As a new type of heat treatment furnace, the continuous furnace is suitable for products with a single variety and mass production. In order to ensure the temperature in the furnace, a large amount of thermal insulation materials must be filled in the furnace shell of the continuous furnace. The traditional thermal insulation material is thermal insulation cotton, but thermal insulation cotton is generally made of asbestos. The installation process will seriously endanger the health of operators, not only that , The insulation cotton has a short service life and is replaced more frequently, which will cause a lot of waste that is difficult to handle. [0003] Foam glass is made of waste glass as the main raw material, and other additives such as foaming age...

Claims

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Application Information

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IPC IPC(8): C03B19/08C03C11/00C03C6/02
CPCC03B19/08C03C1/002C03C11/007
Inventor 郑志伟顾晓文肖伟祥赵玉宝
Owner TONGFU HEAT TREATMENT KUNSHAN
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