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Foaming agent for preparation of hollow glass beads and application of foaming agent

A hollow glass microsphere and foaming agent technology, which is applied in glass production, glass forming, glass manufacturing equipment and other directions, can solve the problems of increased cost, high price of high-performance hollow glass microspheres, easy to break through the glass wall, etc. The effect of improving yield and productivity, promoting large-scale production, and broadening application fields

Active Publication Date: 2013-01-02
(CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] From the reaction mechanism, it can be seen that Na 2 SO 4 In the process of thermal decomposition and release of gas, it is limited by temperature, and the release speed is very fast, so it is difficult to accurately control the amount of gas released in the preparation of hollow glass microspheres, so it is difficult to accurately control the performance of hollow glass microspheres, and because Na 2 SO 4 The release speed of thermal decomposition is very fast, so that during the process of hollow spheroidization of small particle glass powder, the gas easily breaks through the glass wall and forms a large number of solid microbeads, resulting in low yield and greatly increased cost, and is easy to form in the process of glass powder preparation. Glauber's salt water seriously corrodes the refractory material of the furnace
Due to the high price of high-performance hollow glass microspheres, its application in many civil fields is limited.
[0007] Sodium antimonate (NaSb(OH) 6 ) as a glass clarifying agent has been widely used in many glass preparation fields, and it has not been reported that it can be used as a hollow glass microsphere foaming agent

Method used

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  • Foaming agent for preparation of hollow glass beads and application of foaming agent
  • Foaming agent for preparation of hollow glass beads and application of foaming agent
  • Foaming agent for preparation of hollow glass beads and application of foaming agent

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Calculated by weight, quartz sand 56.4kg, feldspar 2.1kg, calcium carbonate 9kg, boric acid 8.5kg, soda ash 20.5kg, lithium carbonate 2.00kg, sodium antimonate 0.25kg, NaNO 3 1.25kg, of which foaming agent accounts for 1.5% of the whole batch, NaNO 3 With sodium antimonate NaSb(OH) 6 The mass ratio is 5:1. Put the mixed glass raw materials into an electric melting crucible and melt at 1450°C for 5 hours, then quench the melted glass in water, dry it at 200°C to 300°C for 5 hours, and grind the dried cullet into Particles of about 1mm, and then the glass particles are crushed and classified in the jet mill classifier, and the particle size of the crushed and classified particles is D 10 =5.99μm, D 50 =23μm, D 90 =45μm, the maximum particle size does not exceed 60μm, the classified glass powder is fed into the spheroidizing furnace with a feeder at a rate of 20kg / h, the spheroidizing temperature is controlled between 1450°C and 1500°C, and the spheroidizing time is 0....

Embodiment 2

[0023] Quartz sand 56.4kg, feldspar 3.5kg, calcium carbonate 9kg, boric acid 8.5kg, soda ash 20.5kg, lithium carbonate 2.00kg, sodium antimonate 0.01kg, NaNO 3 0.09kg, of which the blowing agent accounts for 0.1% of the whole batch, NaNO 3 With sodium antimonate NaSb(OH) 6 The mass ratio is 8:1. Put the mixed glass raw materials into an electric melting crucible and melt at 1450°C for 5 hours, then quench the melted glass in water, dry it at 200°C to 300°C for 5 hours, and grind the dried cullet into Particles of about 1mm, and then the glass particles are crushed and classified in the jet mill classifier, and the particle size of the crushed and classified particles is D 10 =5.99μm, D 50 =23μm, D 90 =45μm, the maximum particle size does not exceed 60μm, the classified glass powder is fed into the spheroidizing furnace with a feeder at a rate of 20kg / h, the spheroidizing temperature is controlled between 1450°C and 1500°C, and the spheroidizing time is 0.5 Seconds, after...

Embodiment 3

[0026] Calculated by weight, quartz sand 60.474kg, feldspar 1.74kg, calcium carbonate 7.40kg, alumina 8.046kg, soda ash 20.56kg, lithium carbonate 0.98kg, sodium antimonate 0.15kg, KNO 3 0.65kg. Among them, the foaming agent accounts for 0.8% of the whole batch, NaNO 3 With sodium antimonate NaSb(OH) 6 The ratio is 4:1. Put the mixed glass raw materials into an electric melting crucible and melt at 1500°C for 5 hours, then quench the melted glass liquid in water, dry at 200°C-300°C for 5 hours, and grind the dried cullet into Particles of about 1mm, and then the glass particles are crushed and classified in the jet mill classifier, and the particle size of the crushed and classified particles is D 10 =3.99μm, D 50 =15.38μm, D 90=30.4μm, the maximum particle size does not exceed 38μm, the graded glass powder is fed into the spheroidizing furnace with a feeder at a rate of 20kg / h, the spheroidizing temperature is controlled between 1350°C and 1450°C, and the spheroidizing ...

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Abstract

The invention discloses a foaming agent for preparation of hollow glass beads. The foaming agent which serves as a component of a glass mixed batch is a mixture of sodium antimonite NaSb(OH)6 with sodium nitrate NaNO3 or potassium nitrate KNO3, wherein the mass ratio of the sodium antimonite NaSb(OH)6 to the sodium nitrate NaNO3 or potassium nitrate KNO3 is 1: (4-8). The foaming agent is used for preparation of high-performance hollow glass beads by means of the glass powder method, and usage of the foaming agent accounts for 0.1-1.5% of the total mass of the glass mixed batch. The prepared hollow glass beads is 0.15-0.7g / cm<3> in density, 3-150MPa in compressive strength, equal to or smaller than 80 micrometers in particle diameter, equal to or larger than 95% in floating rate and larger than 50% in yield weight. By means of the foaming agent for preparation of hollow glass beads, product performance of the hollow glass beads can be precisely controlled, the rate of finished products and yield of the hollow glass beads are greatly increased, cost is reduced, and consequently, the high-performance hollow glass beads can be applied to more fields of military and civilian products to promote mass production of the high-performance hollow glass beads.

Description

technical field [0001] The invention relates to the preparation technology of hollow glass microspheres, in particular to a foaming agent for preparing high-performance hollow glass microspheres by a glass powder method and its application technology. Background technique [0002] Hollow glass microspheres are hollow and tiny spherical materials containing inert gas. It is a kind of hollow particle with unique and stable performance. It is used in military, civilian and other high-tech fields such as solid buoyancy materials, petrochemicals, emulsion explosives, heat insulation and fireproof materials, invisible sound-absorbing materials, advanced insulation materials, chemical product additives, low-density ablative materials, etc. [0003] With the continuous development of science and technology and the continuous development of new application fields, the performance requirements of hollow glass microspheres are getting higher and higher, and the demand for high-performa...

Claims

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Application Information

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IPC IPC(8): C03C6/00C03B19/10C03B19/08C03C12/00
CPCC03B19/1075Y02P40/57
Inventor 王芸彭小波彭程彭寿
Owner (CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD
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