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A kind of foam glass-ceramics and preparation method of composite utilization of iron tailings and waste glass

A technology of foamed glass-ceramics and waste glass, which is applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., and can solve the problems of high equipment requirements, high matching degree of foaming agent and powder vitrification temperature, high energy consumption, etc.

Active Publication Date: 2021-04-09
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the two-step method can better control the composition of raw materials and burn products more uniformly, it requires high equipment and high energy consumption.
Although the one-step method is simple and economical, the raw materials are not easy to homogenize, and the degree of matching between the foaming agent and the glass transition temperature of the powder is high

Method used

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  • A kind of foam glass-ceramics and preparation method of composite utilization of iron tailings and waste glass
  • A kind of foam glass-ceramics and preparation method of composite utilization of iron tailings and waste glass
  • A kind of foam glass-ceramics and preparation method of composite utilization of iron tailings and waste glass

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preparation example Construction

[0034] refer to figure 1 and figure 2 , the embodiment of the present invention also provides the preparation method of the foamed glass-ceramic of above-mentioned composite utilization iron tailings and waste glass, comprises the following steps:

[0035] Step S1, weighing 32% to 37% of waste glass, 26% to 31% of iron tailings, 20% to 25% of potassium feldspar, 2% to 5% of calcite, and 0.8% to 1.5% of foam stabilizer in terms of mass percentage Agent, 2% to 4% flux and 0% to 7% foaming agent are mixed to obtain a mixture; among them, the waste glass is waste flat glass, and the foam stabilizer is Na 3 PO 4 12H 2 O, co-solvent selection B 2 o 3 , the foaming agent is green α-SiC;

[0036] Step S2, grinding the mixture so that the particle size reaches below 200 mesh, then adding the ground mixture into a mold covered with release paper, paving and compacting;

[0037] Step S3, put the mold and the mixture into a muffle furnace for firing, first rapidly raise the temper...

Embodiment 1

[0040]In terms of mass percentage, weigh 35.698% waste glass, 28.627% iron tailings, 22.957% potassium feldspar, 3.763% calcite, 0.953% Na 3 PO 4 12H 2 O, 3.002% B 2 o 3 Mix with 5% green α-SiC to obtain a mixture; add the mixture to a vibrating mill and grind for 3 minutes at a rate of 710 rad / min to make the particle size of the mixture below 200 mesh, then weigh the ground mixture and add it to the In the corundum mold of alumina release paper, pave and compact; put the corundum mold and the mixture into the silicon-molybdenum rod high-temperature muffle furnace, first rapidly raise the temperature to 880°C, keep warm for 30min, and then heat up to 1060°C After foaming for 10 minutes, quickly cool down to 600°C to start annealing, then slowly cool down at a rate of 100°C / h, and after two hours, the temperature drops from 600°C to 400°C to complete the annealing process, then stop heating, and cool down with the furnace to Room temperature, demoulding treatment, using a ...

Embodiment 2

[0049] The only difference between Example 2 and Example 1 is that the foaming temperatures are respectively set to 1040°C, 1050°C, 1070°C, and 1080°C, and the rest are basically the same as Example 1.

[0050] The flexural properties (bending strength) and density data of the foamed glass-ceramics prepared under different foaming temperatures are shown in Table 1:

[0051] The flexural properties (flexural strength) and density data of the foamed glass-ceramics prepared under different foaming temperatures in table 1

[0052]

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Abstract

The invention provides a kind of foamed glass-ceramics which compositely utilizes iron tailings and waste glass, which is prepared from the following raw materials in mass percentage: 32%-37% waste glass, 26%-31% iron tailings, 20%-25% Potassium feldspar, 2%-5% calcite, 0.8%-1.5% foam stabilizer, 2%-4% flux, 0%-7% foaming agent. The present invention also provides a method for preparing foamed glass-ceramic compositely utilizing iron tailings and waste glass, the steps are as follows: Weigh waste glass, iron tailings, potassium feldspar, calcite, foam stabilizer, flux and foam Mix the agent to obtain a mixture; grind the mixture, then add the mixture to a mold covered with release paper, spread it flat and compact; put the mold and the mixture into a muffle furnace for firing, first raise the temperature to homogenize, and then raise the temperature to foam , cooling and annealing, stopping heating, cooling with the furnace, demoulding, grinding and drying to obtain foamed glass-ceramics. The foamed glass-ceramic provided by the invention has the advantages of good mechanical properties, light weight, heat preservation, heat insulation, flame retardancy and chemical corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of wall thermal insulation materials, in particular to a foamed glass-ceramic and a preparation method for compositely utilizing iron tailings and waste glass. Background technique [0002] my country's research and development and production of wall thermal insulation materials started relatively late. Since the 1980s, my country's wall thermal insulation materials have developed rapidly, which mainly include: mineral wool, polystyrene foam board, polystyrene Granular insulation slurry and polyurethane board, etc. Mineral wool was widely used in the field of building insulation in the 1950s and 1960s in mainland China due to its advantages of good fire resistance, low price, and sound insulation. However, mineral wool has disadvantages such as low tensile strength and poor durability. With the mature development and application of organic thermal insulation materials, mineral wool has gradually withdrawn fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C6/10C03C6/02C03C1/00C03B19/08C03C10/04C03B19/06
CPCC03B19/06C03B19/08C03C1/00C03C1/002C03C10/0063
Inventor 杨眉杨博
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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