Silicon smelting waste residue foam microcrystalline glass and preparation method thereof

A technology for foamed glass-ceramics and silicon waste residues is applied in the field of silicon-smelting wastes foamed glass-ceramics and its preparation, which can solve problems such as low mechanical strength, and achieve the effects of reducing production costs and reducing pollution

Inactive Publication Date: 2014-01-29
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Foam glass is light (≤500kg / m 3 ), heat preservation, but the mechanical strength is low, so it is suitable to be used as thermal insulation material rather than as wall load-bearing material

Method used

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  • Silicon smelting waste residue foam microcrystalline glass and preparation method thereof
  • Silicon smelting waste residue foam microcrystalline glass and preparation method thereof
  • Silicon smelting waste residue foam microcrystalline glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Preparation of basic glass

[0047] Crush the cold silicon slag and various auxiliary materials, then pass through a 40-mesh sieve, and accurately weigh 76.0 kg of cold silicon slag, 14.8 kg of calcium carbonate, 10.2 kg of calcium fluoride, 2.5 kg of zinc oxide, 1.3 kg of three Aluminum oxide, 2.0 kg ammonium nitrate, 0.5 kg sodium sulfate. Put various raw materials into a mixer or agitator, add 5.0% water of the total weight of the raw materials, and stir evenly to make a basic glass batch. Melt the basic glass batch material in the range of 1470-1485°C for 2.5-3.5h to make a glass melt, and then keep it in the range of 1350-1370°C for 1.0-3.0h to homogenize and clarify the glass liquid to obtain a high temperature molten state glass melt (such as figure 1 shown).

[0048] Or crush various auxiliary materials, then pass through a 40-mesh sieve, and accurately weigh 14.8 kg of calcium carbonate, 10.2 kg of calcium fluoride, 2.5 kg of zinc oxide, 1.3 kg of alumin...

Embodiment 2

[0059] (1) Preparation of basic glass

[0060] Crush the cold silicon slag and various auxiliary materials, then pass through a 40-mesh sieve, and accurately weigh 50.0 kg of cold silicon slag, 21.0 kg of quartz sand, 14.5 kg of calcium carbonate, 10.2 kg of calcium fluoride, and 8.0 kg of carbonate Potassium, 3.0 kg zinc oxide, 1.4 kg aluminum oxide, 2.2 kg ammonium nitrate, 0.3 kg sodium sulfate. Put various raw materials into a mixer or agitator, add 5.0% water of the total weight of the raw materials, and stir evenly to make a basic glass batch. Melt the basic glass batch material in the range of 1450-1460°C for 2.5-3.0h to make a glass melt, and then keep it in the range of 1350-1370°C for 1.0-3.0h to homogenize and clarify the glass liquid to obtain a high temperature molten state glass melt (such as figure 1 shown).

[0061] Or crush various auxiliary materials, then pass through a 40-mesh sieve, and accurately weigh 14.5 kg of calcium carbonate, 21.0 kg of quartz sa...

Embodiment 3

[0072] (1) Preparation of basic glass

[0073] Crush the cold silicon slag and various auxiliary materials, then pass through a 40-mesh sieve, and accurately weigh 60.0 kg of cold silicon slag, 12.0 kg of quartz sand, 14.8 kg of calcium carbonate, 10.2 kg of calcium fluoride, and 5.0 kg of carbonate Potassium, 3.0 kg zinc oxide, 1.3 kg aluminum oxide, 2.0 kg ammonium nitrate, 0.5 kg sodium sulfate. Put various raw materials into a mixer or agitator, add 5.0% water of the total weight of the raw materials, and stir evenly to make a basic glass batch. Melt the basic glass batch material in the range of 1470-1480°C for 2.0-3.0h to make a glass melt, then keep it in the range of 1350-1370°C for 1.0-3.0h, homogenize and clarify the glass liquid, and obtain a high temperature molten state glass melt (such as figure 1 shown).

[0074] Or crush various auxiliary materials, then pass through a 40-mesh sieve, and accurately weigh 12.0 kg of quartz sand, 14.8 kg of calcium carbonate, ...

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Abstract

The invention relates to silicon smelting waste residue foam microcrystalline glass and a preparation method thereof. The glass takes silicon smelting waste residue as a main raw material, and takes SiO2, CaCO3, Na2CO3, ZnO, K2CO3 and other additives and clarifying agents as auxiliary materials. The preparation method comprises the following steps: uniformly mixing the cold silicon residue and the auxiliary materials in a mixer, and melting at a high temperature in a melting furnace to obtain a qualified glass solution; cooling the glass solution to obtain base glass; smashing the base glass, and thoroughly mixing with a foaming agent, a foam stabilizer and regulation components to form a sintering batch; and feeding the sintering batch into a combined mold, then integrally transferring the sintering batch into a heat treatment kiln together with the mold, firing, annealing, cooling, and demolding to obtain the foam microcrystalline glass. According to the invention, the foam microcrystalline glass is light in weight and resistant to wear and acid/alkali corrosion, can keep warm, has favorable machinability, and can be widely used for heat insulation and warm keeping of pipelines, storage tanks and heat exchange systems in the fields of chemical industry, metallurgy, architectural decoration, petroleum, mines, machinery and the like as well as composite heat insulation systems and sound insulation/absorption systems working under special conditions.

Description

technical field [0001] The invention relates to a foamed glass-ceramic, especially to a foamed glass-ceramic prepared by utilizing silicon smelting waste slag discharged during polysilicon refining and smelting, and a preparation method thereof. Alkali corrosion and foamed glass-ceramics with good machinability can make large use of industrial solid waste silicon smelting slag, and the product has excellent physical and mechanical properties and stable chemical properties. Background technique [0002] In the process of producing polysilicon by metallurgical method, slagging oxidation refining has many advantages such as simple process, low cost and less pollution. The slagging oxidation refining process is to add refining slag with a higher melting point than metallurgical silicon to metallurgical silicon, and perform oxidation refining between the melting points of silicon and slag. Usually when the ratio of slag to gold is η=3, the effect of slag removal is the best. Af...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C11/00C03C10/00
Inventor 曹建尉王志赵庆朝
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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