WO2021143308A1

WO2021143308A1 - Environmentally-friendly method for preparing superfine fiber glass wool

Info

Publication number: WO2021143308A1
Application number: PCT/CN2020/127063
Authority: WO
Inventors: 秦伯军; 张君; 秦天德; 刘远斌; 翟必赢; 谢存剑; 曹鑫; 徐乐
Original assignee: 赢胜节能集团有限公司
Priority date: 2020-01-19
Filing date: 2020-11-06
Publication date: 2021-07-22
Also published as: CN111153596A

Abstract

An environmentally-friendly method for preparing superfine fiber glass wool. The process thereof comprises mixing raw materials of cullet, borax, soda ash, and feldspar according to a formula in parts by mass, and feeding the mixture into a kiln and melting, in which the melt flows through a material channel to a drain plate and flows out and enters a centrifuge, in which a large quantity of thin glass streams are ejected from a side wall under high-speed rotation of the centrifuge, and are further extended under a high-temperature and high-speed flame generated in a combustion chamber to form superfine fibers, and spraying an environmentally-friendly formaldehyde-free adhesive in the centrifuge, collecting the wool, and curing and forming, to obtain superfine glass wool with a diameter of 2.5-4 μm. The method is environmentally-friendly, has good heat preservation effects, excellent sound insulation and noise reduction performance, and is widely applicable.

Description

Preparation method of environment-friendly superfine fiber glass wool

Technical field

The invention relates to a kind of glass wool, in particular to a preparation method of environmentally-friendly superfine fiber glass wool and products thereof.

technical background

Environmentally friendly microfiber glass wool products are widely used in aerospace, aviation, shipbuilding, construction and other fields with their superior performance. They are indispensable sound insulation for aircraft, rockets, high-speed rail, chemical, metallurgy, electric power, petroleum, construction and other industries. Insulating functional materials, many high-end materials rely on imports, not only expensive and some products are also subject to embargo. Traditional glass wool fibers are relatively thick, and glass wool fiber products have large interlaced and irregularly arranged fiber gaps. The product quality is unstable, and the sound wave reflection cannot be performed well, and the sound insulation effect is not good; and the thicker fiber has a larger contact surface , Accelerate the heat conduction, and reduce the heat preservation effect.

Summary of the invention

The purpose of the present invention is to provide an environmentally friendly superfine fiber glass wool product in order to overcome the above shortcomings and meet the requirements of the high-end market.

The technical scheme of the present invention includes: an environment-friendly method for preparing ultrafine fiber glass wool, characterized in that the raw material composition includes 55-65 parts by mass of cullet, 17-23 parts of feldspar, and 12-16 parts of borax. , Soda ash 5-6.5 parts, the raw materials are mixed and sent to the furnace for melting according to the proportion, and flow through the material channel to the leakage plate and flow out into the centrifuge. Under the high-speed rotation of the centrifuge, a large amount of glass trickle is thrown out from the side wall, which generates high temperature in the combustion chamber It is stretched again under high-speed flame to form ultra-fine fibers.

An environment-friendly method for preparing ultrafine fiber glass wool, which is characterized in that:

(1) Crush the cullet and feldspar, add borax, soda ash and spray a small amount of water mist to mix and stir. The stirring speed is 700-750r/min to form a mixture, and then it is added to the kiln for high-temperature melting, and the temperature is set to 1250-1450. ℃, then enter the forehearth;

(2) The glass liquid enters the centrifuge guide tube through the leakage plate after the forehearth, the centrifuge rotates at a high speed of 2400-3000r/min, and the small holes on the side wall throw out the glass fiber stream of 10-30μm;

(3) After the glass fiber stream is spun out with the high-speed rotation of the centrifuge, it is further drawn by the high-temperature and high-speed airflow ejected from the annular combustion chamber under the centrifuge to form 2.5-4μm ultra-fine glass fibers, which are ejected from the annular burner of the annular combustion chamber The high-temperature airflow is 900-1000℃.

A preparation method of environment-friendly superfine fiber glass wool products, which is characterized in that:

(3) After the glass fiber stream is spun out with the high-speed rotation of the centrifuge, it is further drawn by the high-temperature and high-speed airflow ejected from the annular combustion chamber under the centrifuge to form 2.5-4μm ultra-fine glass fibers, which are ejected from the annular burner of the annular combustion chamber The high temperature airflow is 900-1000℃;

(4) When the glass fiber sinks in a spiral shape with the airflow, the atomized 1-1.5μm formaldehyde-free binder is sprayed out by the atomizing jet pump and sprayed evenly on the glass fiber with the help of the suction force of the induced draft fan. Drop onto the cotton collecting net and continuously send it into the curing furnace;

(5) Adjust the temperature of the curing oven at 100-300℃, and the curing time at a constant speed of 3-8 minutes, so that the glass wool can be cured into a product.

An environment-friendly method for preparing ultrafine fiber glass wool products, which is characterized in that: crushing broken glass and feldspar, adding borax and soda ash and spraying a small amount of water mist for mixing and stirring, and the mixing speed is 700-750r/min to form a mixture , Then put it into the kiln for high-temperature melting, set the temperature to 1250-1450℃, and then enter the forehearth;

A. The glass liquid enters the centrifuge guide tube through the leakage plate after the material channel, and the centrifuge rotates at a high speed of 2400-3000r/min, and the small holes on the side wall throw out the glass fiber stream of 10-30μm;

B. After the glass fiber stream is spun out with the high-speed rotation of the centrifuge, it is further drawn by the high-temperature and high-speed airflow ejected from the annular combustion chamber under the centrifuge to form 2.5-4μm ultra-fine glass fibers, which are ejected from the annular burner of the annular combustion chamber. The high temperature air flow is between 900-1000℃;

C. When the glass fiber spirally settles with the air flow, the atomized 1-1.5 μm formaldehyde-free binder is sprayed by the atomizing jet pump, and it is evenly sprayed on the glass fiber, with the help of the suction of the induced draft fan. On the cotton collecting net, it is continuously sent to the curing furnace;

D. Adjust the temperature of the curing oven at 100-300°C, the curing oven maintains a nitrogen filling pressure of 0.2-0.4Mpa, and a uniform curing time of 3-8 minutes, so that the glass wool can be cured into a product.

In the present invention, the glass fiber thrown out by the high-speed rotation of the centrifuge is further drawn by the high-temperature and high-speed air flow ejected from the annular combustion chamber to form 2.5-4μm ultra-fine glass fiber, and the glass fiber is sprayed proportionally during the process of falling onto the cotton collecting net. The pump sprays the formaldehyde-free binder and cures under nitrogen pressure in the curing furnace to effectively control the density and adhesiveness of the cotton fiberglass, combined with the sound insulation and heat insulation properties of the adhesive, and effectively solve the fiber arrangement in the traditional glass wool The large gap leads to the problem of unstable product quality and poor sound insulation effect, and the fiber gap is uniform and fine, and the contact surface is small, which effectively prevents heat conduction and improves the thermal insulation effect. It can be widely used in floor floating In the sound insulation system.

Detailed ways

Example 1

An environment-friendly method for preparing ultrafine fiber glass wool. The raw materials include 65 parts of cullet, 23 parts of feldspar, 16 parts of borax, and 6.5 parts of soda ash according to the composition mass parts. When the leaking plate flows out and enters the centrifuge, a large amount of thin glass stream is thrown out from the side wall under the high-speed rotation of the centrifuge, and is stretched again to form ultra-fine fibers under the high-temperature and high-speed flame generated in the combustion chamber. It includes the following steps:

(1) Crush the cullet and feldspar, add borax, soda ash and spray a small amount of water mist to mix and stir. The stirring speed is 750r/min to form a mixture, and then it is added to the kiln for high temperature melting. The temperature is set at 1450°C, and then enters Feed channel

(2) The glass liquid enters the centrifuge guide tube through the leakage plate after the forehearth, the centrifuge rotates at a high speed of 3000r/min, and the small holes on the side wall throw out 30μm glass fiber streams;

(3) After the glass fiber stream is spun out with the high-speed rotation of the centrifuge, it is further drawn by the high-temperature and high-speed airflow ejected from the annular combustion chamber under the centrifuge to form ultra-fine glass fibers of 4μm. The high temperature emitted from the annular nozzle of the annular combustion chamber The airflow is at 1000°C.

An environmentally friendly preparation method of ultrafine fiber glass wool products, including the following steps: the above 4μm ultrafine glass fibers are sprayed through an atomizing jet pump in the process of spirally sinking with the airflow. The formaldehyde binder is evenly sprayed on the glass fiber, falls on the cotton collecting net by the suction of the induced draft fan, and is continuously sent to the curing furnace;

(5) Adjust the temperature of the curing furnace at 300°C, divided into 150°C in one zone, 160°C in the second zone, 230°C in the third zone, and 220°C in the fourth zone. The uniform curing time is 8 minutes, and the glass wool is cured into a product.

Example 2

An environment-friendly method for preparing ultrafine fiber glass wool. The raw materials include 55 parts of cullet, 17 parts of feldspar, 12 parts of borax, and 5 parts of soda ash according to the composition mass parts. When the leaking plate flows out and enters the centrifuge, a large amount of thin glass stream is thrown out from the side wall under the high-speed rotation of the centrifuge, and is stretched again to form ultra-fine fibers under the high-temperature and high-speed flame generated in the combustion chamber. It includes the following steps:

(1) Crush the cullet and feldspar, add borax, soda ash and spray a small amount of water mist to mix and stir. The stirring speed is 700r/min to form a mixture, and then it is added to the kiln for high temperature melting. The temperature is set at 1250°C, and then enter Feed channel

(2) The glass liquid enters the centrifuge guide tube through the leakage plate after the material channel, and the centrifuge rotates at a high speed of 2400-3000r/min, and the small holes on the side wall throw out 10μm glass fiber streams;

(3) After the glass fiber stream is spun out with the high-speed rotation of the centrifuge, it is further drawn by the high-temperature and high-speed airflow ejected from the annular combustion chamber under the centrifuge to form 2.5μm ultra-fine glass fiber, which is ejected from the annular nozzle of the annular combustion chamber. The high-temperature airflow is at 900°C.

An environment-friendly method for preparing ultrafine fiber glass wool products, the above 2.5μm ultrafine glass fiber is sprayed through an atomizing jet pump in the process of spirally sinking with the airflow, and atomized 1μm formaldehyde-free binder , Spray evenly on the glass fiber, fall on the cotton collecting net with the suction of the induced draft fan, and continuously send it into the curing furnace;

(5) Adjust the temperature of the curing oven at 100-300°C, divided into 150°C in the first zone, 160°C in the second zone, 230°C in the third zone, and 220°C in the fourth zone. The uniform curing time is 3 minutes, and the glass wool is cured into products.

Example 3

An environment-friendly method for preparing ultra-fine fiber glass wool. The raw materials include 60 parts of cullet, 20 parts of feldspar, 15 parts of borax, and 6 parts of soda ash according to the composition mass parts. When the leaking plate flows out and enters the centrifuge, a large amount of thin glass stream is thrown out from the side wall under the high-speed rotation of the centrifuge, and is stretched again to form ultra-fine fibers under the high-temperature and high-speed flame generated in the combustion chamber. It includes the following steps:

(1) Crush the cullet and feldspar, add borax, soda ash and spray a small amount of water mist to mix and stir. The stirring speed is 725r/min to form a mixture, and then it is added to the kiln for high temperature melting. The temperature is set at 1380℃, and then enter Feed channel

(2) Glass liquid enters the centrifuge guide tube through the leakage plate after the forehearth, the centrifuge rotates at a high speed of 2800r/min, and the small holes on the side wall throw out 15μm glass fiber streams;

(3) After the glass fiber stream is spun out with the high-speed rotation of the centrifuge, it is further drawn by the high-temperature and high-speed airflow ejected from the annular combustion chamber under the centrifuge to form 3μm ultra-fine glass fibers. The high temperature emitted from the annular nozzle of the annular combustion chamber The airflow is at 950°C.

An environment-friendly method for preparing ultrafine fiber glass wool products. The above 3μm ultrafine glass fiber is sprayed out of an atomized 1.25μm formaldehyde-free binder through an atomizing jet pump in the process of spirally sinking with the airflow. , Spray evenly on the glass fiber, fall on the cotton collecting net with the suction of the induced draft fan, and continuously send it into the curing furnace;

(5) Adjust the temperature of the curing oven at 100-300°C, divided into 150°C, 160°C, 230°C and 220°C in one zone, and the curing time is 4 minutes at a constant speed. The glass wool is cured into products.

Example 4

(5) Adjust the curing furnace to maintain the nitrogen filling pressure 0.2-0.4Mpa, the curing furnace temperature is 100-300℃, divided into one zone 150℃, two zone 160℃, three zone 230℃, four zone 220℃ curing molding, uniform curing time In 4 minutes, the glass wool is cured into a product.

Example 4 is the best example. Compared with Example 3, the glass wool product prepared by it has improved heat insulation performance and sound insulation performance by more than 10%.

Claims

An environment-friendly method for preparing ultrafine fiber glass wool, characterized in that: the raw material composition comprises 55-65 parts by mass of cullet, 17-23 parts of feldspar, 12-16 parts of borax, 5-6.5 parts of soda ash, The raw materials are mixed and sent to the kiln to melt according to the ratio, flow through the material channel to the leakage plate and enter the centrifuge. Under the high-speed rotation of the centrifuge, a large amount of glass trickle is thrown out from the side wall, and it is stretched again under the high-temperature and high-speed flame generated in the combustion chamber. superfine fiber.
An environment-friendly method for preparing ultrafine fiber glass wool, which is characterized in that:

(1) Crush the cullet and feldspar, add borax, soda ash and spray a small amount of water mist to mix and stir. The stirring speed is 700-750r/min to form a mixture, and then it is added to the kiln for high temperature melting, and the temperature is set at 1250-1450. ℃, then enter the forehearth;

(2) The glass liquid enters the centrifuge guide tube through the leakage plate after the material channel, and the centrifuge rotates at a high speed of 2400-3000r/min, and the small holes on the side wall throw out the glass fiber stream of 10-30μm;

(3) After the glass fiber stream is spun out with the high-speed rotation of the centrifuge, it is further drawn by the high-temperature and high-speed airflow ejected from the annular combustion chamber under the centrifuge to form 2.5-4μm ultra-fine glass fibers, which are ejected from the annular burner of the annular combustion chamber. The high temperature airflow is 900-1000℃.
A preparation method of environment-friendly superfine fiber glass wool products, which is characterized in that:

(1) Crush the cullet and feldspar, add borax, soda ash and spray a small amount of water mist to mix and stir. The stirring speed is 700-750r/min to form a mixture, and then it is added to the kiln for high temperature melting, and the temperature is set at 1250-1450. ℃, then enter the forehearth;

(2) The glass liquid enters the centrifuge guide tube through the leakage plate after the material channel, and the centrifuge rotates at a high speed of 2400-3000r/min, and the small holes on the side wall throw out the glass fiber stream of 10-30μm;

(3) After the glass fiber stream is spun out with the high-speed rotation of the centrifuge, it is further drawn by the high-temperature and high-speed airflow ejected from the annular combustion chamber under the centrifuge to form 2.5-4μm ultra-fine glass fibers, which are ejected from the annular burner of the annular combustion chamber. The high temperature airflow is 900-1000℃;

(4) When the glass fiber is spirally settling with the airflow, the atomized 1-1.5μm formaldehyde-free binder is sprayed by the atomizing jet pump and sprayed evenly on the glass fiber with the help of the suction of the induced draft fan. Drop onto the cotton collecting net and continuously send it into the curing furnace;

(5) Adjust the temperature of the curing oven at 100-300°C, and the curing time at a constant speed of 3-8 minutes, so that the glass wool can be cured into a product.
[Corrected according to Rule 26 26.11.2020]

An environment-friendly method for preparing ultrafine fiber glass wool products, which is characterized by: crushing broken glass and feldspar, adding borax and soda ash and spraying a small amount of water mist for mixing and stirring, and the mixing speed is 700-750r/min to form a mixture , Then put it into the kiln for high-temperature melting, set the temperature to 1250-1450℃, and then enter the forehearth;

A. The glass liquid enters the centrifuge guide tube through the leakage plate after the material channel. The centrifuge rotates at a high speed of 2400-3000r/min, and the small holes on the side wall throw out 10-30μm glass fiber streams;

B. After the glass fiber stream is spun out with the high-speed rotation of the centrifuge, it is further drawn by the high-temperature and high-speed air flow ejected from the annular combustion chamber under the centrifuge to form 2.5-4μm ultra-fine glass fiber, which is ejected from the annular nozzle of the annular combustion chamber. The high temperature air flow is 900-1000℃;

C. When the glass fiber spirally settles with the airflow, the atomized 1-1.5μm formaldehyde-free binder is sprayed out by the atomizing jet pump, and it is evenly sprayed on the glass fiber, with the help of the suction of the induced draft fan. On the cotton collecting net, it is continuously sent to the curing furnace;

D. Adjust the temperature of the curing oven at 100-300°C, the curing oven maintains a nitrogen filling pressure of 0.2-0.4Mpa, and a uniform curing time of 3-8 minutes, so that the glass wool can be cured into a product.