Method of preparing foam glass based on boric sludge

A technology of foam glass and boron mud, which is applied in the field of functional inorganic materials, can solve the problem of small dosage, and achieve the effect that is conducive to circular economy and sustainable development

Inactive Publication Date: 2007-10-24
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
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Problems solved by technology

The existing treatment method is to stack it in a certain area to limit emissions, and individu

Method used

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Examples

Experimental program
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Example Embodiment

[0015] Example 1

[0016] Grind 100g waste glass to 100-200 mesh, then mix with 40~70g demagnesium boron mud, heat to 900~1300℃, keep for 20~40min; after quenching, grind into glass powder; then add 3~15g sodium carbonate, 1~5g of borax and 2~6g of sodium phosphate, put them into the mold, and sinter according to the following sintering system: Start heating to 530~570℃ at a rate of 20~25℃ / min, keep constant temperature for 20~30min, and continue to heat up to 760~800 ℃, keep constant temperature for 30-40min, then cool to 500~550℃ at 25~30℃ / min, keep constant temperature for 50~70min, and finally anneal at 1.5~5℃ / min to 100~200℃, the product has good foaming effect. No cracking, it belongs to thermal insulation foam glass. Product performance: apparent density: 160±30Kg / m3; water absorption: 0.5±0.4vol%; average bubble diameter: 1.2±0.4mm; thermal conductivity: 0.060±0.030w / m.k.

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Abstract

The invention discloses a making method of foam glass based on boron mud in the functional inorganic material technical domain, which comprises the following steps: blending the broken waste glass and magnesium-stripping boron-mud according to proportion; grinding into raw material; heating and fusing the raw material; quenching; drying; grinding into glass powder; adding foamier and booster solvent to form the foam glass mating slurry; placing the mating slurry into the mould; pressing; shaping; heating; foaming; stabilizing the foam; annealing; obtaining the foam glass; adjusting the foam-pore structure according to the adjusted component and technique condition; reaching the goal of insulation, silence or water-retaining.

Description

technical field [0001] A method for producing foam glass based on boron mud belongs to the technical field of functional inorganic materials. Background technique [0002] Boron mud is the main waste of the boron chemical industry, which is produced in the process of extracting borax from boron ore or boron-magnesium ore. Millions of tons of boron mud are discharged every year, which not only takes up a lot of land, but also seriously pollutes the environment. The main components of boron mud are magnesium oxide, silicon oxide, calcium oxide, iron oxide and boron-containing insoluble matter. The existing treatment method is to stack it in a certain area to limit discharge, and individual factories mix it with other components to prepare fired bricks, but the amount is very small. The latest scientific method is to convert about 40% of the magnesium oxide into chemical products such as magnesium carbonate or magnesium hydroxide flame retardant, and mix the remaining 50% of ...

Claims

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Application Information

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IPC IPC(8): C03C11/00
Inventor 宁桂玲颜峰孙博林源
Owner DALIAN UNIV OF TECH
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