Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method of fused silica hollow sphere

A technology of fused silica and hollow spheres, which is applied in glass manufacturing equipment, manufacturing tools, glass molding, etc., can solve the problems of low sphere forming rate, thick hollow spheres, and non-compliance with green development. The effect of low production cost

Active Publication Date: 2017-09-26
江苏浩特科技有限公司
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the preparation process of the method described in the above patent is simple and easy to control, when preparing hollow spheres with a particle size of less than 2mm, problems such as low sphere formation rate and thicker wall thickness of the hollow spheres are prone to occur, and the patent uses polystyrene spheres, polyethylene spheres, etc. Organic polymer balls such as rubber balls are used as ball-forming carriers. When sintering fused silica hollow balls, the oxidation heat of the ball-forming carrier releases toxic gases such as toluene, styrene, styrene polymers, and CO, which seriously pollute the atmosphere. The theme of green development

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] A preparation method of fused silica hollow spheres, said preparation method comprising the steps of:

[0021] (1) Take fused silica as raw material, add water, dispersant, foam stabilizer and ball mill and mix for 1-2 hours to obtain a slurry, add a foaming agent to the slurry, perform ball milling and foaming, and obtain a foaming slurry;

[0022] (2) The foamed slurry is passed through the mesh to form droplets, and the droplets are sent to the hot air drying device. The droplets are fully contacted with the hot air to achieve rapid drying, and then the fused silica spherical body is collected at the bottom of the hot air drying device;

[0023] (3) Heat-treating the collected fused silica spherical body to obtain a fused silica hollow sphere.

[0024] The amount of water used is 20-30% of the mass of fused silica.

[0025] The dispersant is one of sodium hexametaphosphate, polyethylene glycol-based polymer FS10 or polycarboxylate-based polymer FS20, and the amount ...

Embodiment 1

[0032] Weigh 1000g of fused silica powder, 200g of water, 10g of sodium hexametaphosphate and 20g of water-soluble starch, put them into a ball mill jar, ball mill for 1 hour, add 20g of sodium lauryl sulfate, and ball mill for foaming.

[0033] The foamed slurry is passed through a mesh with a pore size of 0.5mm to form droplets and directly enters the hot air drying device. The droplets are fully contacted with hot air at 200°C to achieve rapid drying, and the fused silica spherical body is collected at the bottom of the device. The collected blanks were heat-treated at 3°C / min to 1100°C and kept for 2 hours.

[0034] The obtained fused silica hollow spheres have a particle diameter of 0.6-0.8mm and a bulk density of 0.6g / cm3.

Embodiment 2

[0036] Weigh 1000g of fused silica powder, 250g of water, 8g of polyethylene glycol-based polymer FS10 and 25g of water-soluble resin, put them into a ball mill jar, ball mill for 1.5 hours, add 15g of sodium lauryl sulfate, and ball mill for foaming.

[0037] Pass the foamed slurry through the mesh with a pore size of 1mm to form droplets and directly enter the hot air drying device. The droplets are fully contacted with hot air at 250°C to achieve rapid drying, and are collected at the bottom of the device to obtain a fused silica spherical billet with a diameter of 1.3-1.6mm body. The collected blanks were heat-treated at 5°C / min to 1200°C and held for 1 hour.

[0038] The obtained fused silica hollow spheres have a particle diameter of 1.3-1.6 mm and a bulk density of 0.8 g / cm3.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing fused silica hollow spheres. The preparation method includes the following steps: (1) Using fused silica as a raw material, adding water, a dispersant, and a foam stabilizer to ball mill and mix for 1-2 hours to obtain a slurry, which is fed to the Foaming agent is added to the slurry, ball milled and foamed to obtain foamed slurry; (2) The foamed slurry is formed into droplets through the mesh, and the droplets are sent to the hot air drying device, and the droplets are mixed with hot air Fully contact to achieve rapid drying, and then collect the fused silica spherical body at the bottom of the hot air drying device; (3) heat-treat the collected fused silica spherical body to obtain a fused silica hollow sphere; the preparation of the fused silica hollow sphere does not produce toxic gas , green and environment-friendly; the present invention can realize regulation and control of fused silica hollow spheres by adjusting the mesh size; the present invention has simple process, low production cost and is suitable for industrialized production.

Description

technical field [0001] The invention belongs to the field of preparation of hollow quartz spheres, in particular to a method for preparing fused silica hollow spheres. Background technique [0002] Refractory oxide hollow spheres have a closed pore structure and large thermal resistance. They can be directly used as thermal insulation fillers for high-temperature kilns, or made into hollow sphere products and formulated with lightweight castables. They are widely used in high-temperature energy-saving fields. Compared with oxides such as alumina and zirconia, fused silica has a low thermal expansion coefficient and low thermal conductivity. Fused silica hollow spheres have the advantages of good thermal shock resistance and excellent heat insulation effect, and have broad market prospects in the field of high temperature energy saving . [0003] The viscosity of fused silica melt is much higher than that of alumina, zirconia and other melts, so it cannot be blown into balls...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C03B20/00C03B19/10
Inventor 桑迎旺刘秀广
Owner 江苏浩特科技有限公司