WO2020244165A1

WO2020244165A1 - Rock wool production kiln, device and process

Info

Publication number: WO2020244165A1
Application number: PCT/CN2019/119664
Authority: WO
Inventors: 代森伟; 任转波; 范中华; 张宏伟; 孙仁权
Original assignee: 安德森热能科技（苏州）有限责任公司
Priority date: 2019-06-02
Filing date: 2019-11-20
Publication date: 2020-12-10

Abstract

Provided in the present invention are a rock wool production kiln, device and process. The rock wool production kiln comprises a kiln body, a water-cooling jacket, a screw feeder, a vibrating feeder and a combustor, wherein the water-cooling jacket covers an outer wall of the kiln body, and the combustor is mounted at a bottom portion of the kiln body or a side wall of a lower portion of the kiln body. By means of a submerged combustion manner, fuel, combustion-supporting gas and a raw material are fully mixed and combusted, and the fuel is directly injected into the raw material, thereby improving a heat transfer manner and having a severe convection stirring effect on melt, such that the energy utilization rate is extremely high and is three times higher than that of a traditional kiln; nitrogen oxide (NOx) emissions are low and are two times lower than that of a traditional kiln; the size of the kiln is small, the area of the kiln is designed to be 2-6 m², the kiln is easy to start and stop and can melt large materials or powder, and the discharge amount can reach 30 t/d-100 t/d; a water-cooling kiln body is used, so that the service life of the kiln is long, the use of a refractory material is greatly reduced, and dust emission is reduced by 10 times; and a CO treatment system is not needed, and a large amount of equipment investment and operating costs are saved.

Description

Rock wool production kiln, equipment and process

Technical field

The invention relates to the technical field of rock wool production, in particular to a rock wool production kiln, equipment and process.

Background technique

At present, rock wool production mainly relies on cupolas, using coke and ore raw materials. Not only is it not environmentally friendly, but because of its dependence on carbon, it is contrary to the concept of low-carbon, environmentally friendly and green development. At the World Climate Conference in Copenhagen, the Chinese government made a solemn promise to the world that "by 2020, carbon dioxide emissions per unit of GDP will be reduced by 40%-45% compared to 2005". There is an urgent need for a new, efficient and environmentally friendly rock wool production technology. Although there are currently some carbon-free rock wool production processes that use oxygen-enriched, pure oxygen and natural gas combustion methods, because rock wool has a barrier effect on the penetration of radiant heat, the radiation of high-temperature pure oxygen flames can affect a large amount of glass. The effect of melting production is not good.

Summary of the invention

In order to overcome the above shortcomings of the prior art, the purpose of the present invention is to provide a rock wool production kiln, equipment and process.

In order to achieve the above objective, the technical solution adopted by the present invention to solve the technical problem is: a rock wool production kiln, including:

Furnace body, the outer wall of the furnace body is provided with a water cooling jacket;

A screw feeder installed at the first feeding port of the furnace body, the first feeding port being located below the liquid level of the melt in the furnace body during production;

A vibrating feeder installed at the second feeding port of the furnace body;

A burner, the burner is installed at the bottom of the furnace body or the side wall of the lower part of the furnace body, and the nozzle of the burner is immersed under the liquid surface of the melt in the furnace body;

The flue, which is used to discharge exhaust gas from the furnace body during production, is arranged on the upper part of the furnace body;

The forehearth is used for discharging the melt in the furnace.

Compared with the prior art, the present invention adopts a submerged combustion method. The fuel and combustion-supporting gas are fully mixed and burned with the raw materials. The fuel is directly injected into the raw materials, and flames and combustion are generated in the raw materials to melt the raw materials. The burner is placed in the furnace At the bottom, the heat transfer method is improved and the melt has a violent convection stirring effect. The energy utilization rate is extremely high, which is 3 times higher than that of traditional kilns. The NOx emission is low, which is 2 times lower than that of traditional kilns. Small size The area of the kiln is designed to be 2-6m ² , it is convenient to start and stop, can melt bulk materials or powder materials, and the output can reach 30-100t/d; the water-cooled furnace body is used, the furnace life is long, and the refractory materials are greatly reduced The use of, the dust emission is reduced by 10 times; no CO treatment system is needed, saving a lot of equipment investment and operating costs.

Further, the burner includes:

The burner body includes a nozzle panel, a gas chamber, and a combustion-supporting gas chamber. The nozzle panel is evenly provided with a plurality of nozzles. The gas chamber and the combustion-supporting gas chamber are respectively distributed on both sides under the nozzle panel, The nozzle panel is provided with an air guide hole communicating from the fuel gas chamber and the combustion-supporting gas chamber to the nozzle;

The cooling water channel surrounds the burner body. A circle of half partitions is provided in the cooling water channel. The water inlet and the water outlet of the cooling water channel are respectively located on both sides of the half partition, and the inlet The water outlet and the water outlet are respectively distributed at opposite ends of the burner body.

By adopting the above-mentioned preferred solution, the heated water flow generates heat through the side wall to preheat the fuel gas and the combustion air, which improves the flame temperature and stability and reduces the heat loss.

Further, the nozzle is a concave hemispherical groove, the gas guide hole connected to the gas chamber and the gas guide hole connected to the combustion-supporting gas chamber are both in a straight line, and the two gas guide holes are arranged tangentially to the nozzle , The openings of the two air guide holes on the inner wall of the nozzle are arranged diagonally.

By adopting the above-mentioned preferred solution, at each nozzle, fuel gas and combustion-supporting gas are injected through opposite diagonal tangents to generate strong vortex mixing, thereby causing the flame to rotate upward and improving the upward penetration force of the flame.

Further, the number of the bottom surface area of the furnace body ² is less than 4m, the burner is 2; furnace an area of the bottom surface area 2m ² on the basis of each additional area 2m ^2, the increase in the number of burners 1 .

By adopting the above-mentioned preferred scheme, a reasonable number of burners are adopted to ensure combustion efficiency, and also prevent excessive combustion from generating excessive flue gas, thereby effectively reducing emissions.

Further, the height of the first charging port from the bottom surface of the furnace body is 15%-50% of the height of the liquid level of the melt in the furnace body during production.

The above-mentioned preferred scheme is adopted to ensure stable and orderly melting production during normal production, and reduce the fluctuation of the combustion and melting process caused by the feeding of materials into the small space kiln.

Further, the flue has an inclined part on the top of the furnace body, and a temperature sensor is arranged on the upper part of the flue.

By adopting the above-mentioned preferred solution, the inclined part can prevent the heat exchanger from being blocked, and the temperature measuring sensor is arranged on the upper part of the flue, which can detect the temperature in the kiln more reliably.

Further, an ignition rod is provided on the burner, and a flame detector is provided on the ignition rod.

By adopting the above-mentioned preferred scheme, the burner is equipped with ignition rod and flame detection, and the ignition step can respectively detect the self flame in real time.

Further, the upper part of the side wall of the furnace body is provided with an openable and closable furnace door, and an ignition gun mechanism is provided corresponding to the position of the furnace door. The ignition gun mechanism includes an ignition gun, a telescopic mechanism and a swing mechanism, and the telescopic mechanism drives the The firing gun telescopically moves, and the swing mechanism drives the telescopic mechanism and the firing gun to swing together.

By adopting the above-mentioned preferred solution, the burner structure can be simplified, and the kiln configuration cost can be saved by using an external single igniter to ignite.

A rock wool production equipment includes a rock wool production kiln, a fiberizer, a cotton collector, and a curing furnace. The forehearth of the rock wool production kiln is connected to the fiberizer, and the fiberizer blows The fibers are compressed into rock wool fiber sheets by the cotton collector, and then dried and solidified into rock wool in the curing oven.

Further, it also includes a heat exchanger, the flue of the rock wool production kiln is connected to the heat exchanger and the flue gas treatment system, and the heat circulation pipeline of the heat exchanger is also connected to the curing furnace; The thermal circulation pipeline of the heat exchanger is also connected to the raw material storage to be melted; the thermal circulation pipeline of the heat exchanger is also connected to the fuel gas supply pipeline and the combustion-supporting gas supply pipeline of the burner.

Adopting the above-mentioned preferred scheme and integrated submerged combustion kiln, the rock wool production efficiency is high, the quality is stable, and the heat exchanger fully comprehensively reuses the flue gas heat, which saves energy consumption, reduces production costs, and reduces pollution emissions.

A rock wool production process, which includes the following steps:

Batching steps: Weigh the raw materials according to the material side, and add them to the silo of the screw feeder and vibrating feeder after mixing;

Ignition steps: Ignite the burner through the ignition system to reach the set temperature in the kiln;

Feeding steps: Firstly, feed through the screw feeder and the vibrating feeder at the same time. When the melt level in the furnace reaches the set value, turn off the vibrating feeder, and adjust the feeding amount through the screw feeder to keep the feeding and discharge in balance , To keep the melt in the furnace within the set liquid level range;

High-temperature melting temperature control step: by adjusting the flow ratio of the burner gas and the combustion-supporting gas, the furnace temperature is controlled to be kept in the range of 1100-1600℃;

Fiber-forming step: through the fiberizer, blowing into fibers;

Cotton collection step: the fiber is pressed into a certain thickness of rock wool fiber through the cotton collector;

Curing step: drying and curing a certain thickness of rock wool fiber through a curing oven;

Slicing step: Pack the solidified rock wool slices according to the required specifications to make finished rock wool.

Using the above-mentioned preferred scheme, with the help of submerged combustion mode, the flow ratio of the burner gas and the combustion-supporting gas adopts double cross-limiting control to ensure that the air-fuel ratio remains stable during the flow adjustment, the flow adjustment does not fluctuate, and the rock wool quality is more stable ,high productivity.

Further, the ignition step includes the following steps:

Step A1: The igniter is pre-installed on the external mounting bracket of the kiln, and the mounting bracket is equipped with a telescopic mechanism and a swing mechanism; in turn, the igniter is close to the upper part of each burner to ignite the burner;

Step A2: After the last burner is ignited, stay on the upper part of the burner, turn off the natural gas of the igniter, retain the outflow of the combustion-supporting gas of the igniter, and continuously detect the flame through the flame detector on the igniter, and re-ignite if the flame goes out ；

Step A3: When the furnace temperature reaches 850°C or more, turn off the combustion-supporting gas of the ignition gun, exit the furnace, and close the furnace door.

By adopting the above-mentioned preferred scheme, the burner is ignited by an external ignition gun. When the kiln needs emergency heat preservation, the ignition gun can be activated at any time for heat preservation of the kiln.

Further, the ignition step includes the following steps:

Step B1: The burner has its own ignition rod, which has a flame detection function; each burner is ignited by its ignition rod and continues to detect the flame. If the flame is extinguished, it will ignite again;

Step B2: When the furnace temperature reaches 850°C or higher, the flame detection function is on standby, and the temperature of the furnace is detected by the temperature sensor.

By adopting the above-mentioned preferred scheme, each burner is equipped with ignition rods, which improves the stability and reliability of ignition and can detect the flame of each burner in real time.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

Figure 1 is a schematic structural diagram of an embodiment of the present invention;

Figure 2 is a schematic structural view of an embodiment of the burner of the present invention;

Figure 3 is a sectional view of the structure taken along the line A-A in Figure 2;

Figure 4 is a flow chart of the rock wool production process of the present invention.

The names of the corresponding parts indicated by the numbers and letters in the figure:

1- furnace body; 11- water cooling jacket; 12- first feeding port; 13- second feeding port; 14- flue; 15- feed channel; 2- burner; 21- burner body; 211- nozzle panel; 212-nozzle; 213-air guide hole; 214-gas chamber; 215-combustion-supporting gas chamber; 22-cooling water channel; 221-water inlet; 222-water outlet; 223-half partition.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

As shown in Figure 1, one embodiment of the present invention is: a rock wool production kiln, including:

Furnace body 1, the outer wall of the furnace body 1 is provided with a water cooling jacket 11;

The screw feeder is installed at the first feeding port 12 of the furnace body 1, and the first feeding port 12 is located below the liquid level of the melt in the furnace body during production;

Vibrating feeder, which is installed at the second feeding port 13 of the furnace body 1;

Burner 2. The burner 2 is installed at the bottom of the furnace body or the side wall of the lower part of the furnace body, and the nozzle of the burner 2 is immersed under the liquid surface of the melt in the furnace body;

The flue 14 is used to discharge exhaust gas from the furnace body during production, and is arranged on the upper part of the furnace body 1;

The forehearth 15 is used for discharging the melt in the furnace. The forehearth adopts fused bricks, and the gate brick is used to adjust the discharge speed.

The beneficial effects of adopting the above technical scheme are: using the submerged combustion method, the fuel and combustion-supporting gas are fully mixed and burned with the raw materials, the fuel is directly injected into the raw materials, and flames and combustion are generated inside the raw materials to melt the raw materials, and the burner is placed in the furnace At the bottom, the heat transfer method is improved and the melt has a violent convection stirring effect. The energy utilization rate is extremely high, which is 3 times higher than that of traditional kilns. The NOx emission is low, which is 2 times lower than that of traditional kilns. Small size The area of the kiln is designed to be 2-6m ² , it is convenient to start and stop, can melt bulk materials or powder materials, and the output can reach 30-100t/d; the water-cooled furnace body is used, the furnace life is long, and the refractory materials are greatly reduced The use of, the dust emission is reduced by 10 times; no CO treatment system is needed, saving a lot of equipment investment and operating costs.

As shown in Figures 2 and 3, in other embodiments of the present invention, the burner 2 includes: a burner body 21, which includes a nozzle panel 211, a gas chamber 214, and a combustion-supporting gas chamber 215. A plurality of nozzles 212 are provided. The gas chamber 214 and the combustion-supporting gas chamber 215 are respectively distributed on both sides below the nozzle panel 211. The nozzle panel 211 is provided with the combustion chamber 214 and the combustion-supporting gas chamber 215 respectively connected to the nozzle 212 The air guide hole 213; the cooling water channel 22, which surrounds the burner body 21, the cooling water channel 22 is provided with a circle of half partitions 223, the water inlet 221 and the water outlet 222 of the cooling water channel 22 are located in the half partitions On both sides of 223, the water inlet 221 and the water outlet 222 are respectively distributed at opposite ends of the burner body 21. The combustion-supporting gas of the burner can be air, preheated air, oxygen-enriched or oxygen. The beneficial effect of adopting the above technical solution is that the heated water flow generates heat through the side wall to preheat the fuel gas and the combustion air, which improves the flame temperature and stability and reduces heat loss.

As shown in FIGS. 2 and 3, in other embodiments of the present invention, the nozzle 212 is a concave hemispherical groove, and the air guide hole 213 connected to the fuel gas chamber 214 and the air guide hole 213 connected to the combustion gas chamber 215 The two air guide holes 213 are arranged tangentially to the nozzle 212, and the two air guide holes 213 are arranged diagonally at the opening of the inner wall of the nozzle. The beneficial effect of adopting the above technical solution is that at each nozzle, the fuel gas and the combustion-supporting gas are injected through opposite diagonal tangents to generate strong vortex mixing, thereby causing the flame to rotate upward and improving the upward penetration of the flame.

In other embodiments of the present invention, the overall size of the burner is 150mm(W)×600mm(L), and when the bottom area of the furnace body is less than 4m ² , the number of the burners is two; the bottom surface of the furnace body area based on the area 2m ^2, 2m ² for each additional area, increasing the number of burners 1. The beneficial effects of adopting the above technical solution are: adopting a reasonable number of burners to ensure combustion efficiency, prevent excessive combustion from generating excessive smoke, and effectively reduce emissions.

In some other embodiments of the present invention, in order to better deliver the heating efficiency, burners are installed at the bottom of the furnace body and the lower side wall of the furnace body at the same time. Taking a kiln with an area of 4m ² as an example, the approximate size of the kiln is long 2400mm×width 1650mm×high 2000mm, the melt level in the furnace during normal production is about 1000mm, two burners are installed on the bottom of the furnace body, and one burner is installed on the lower part of the side wall opposite the furnace body and the forehearth. In this way, the vertical and horizontal dual heat convection and agitation conduction are formed. The thermal impact of the burner on the side wall also promotes the flow of the melt to the end of the material channel, reducing the circulation of the melt in the furnace and improving the production efficiency.

In other embodiments of the present invention, the height of the first charging port 12 from the bottom surface of the furnace body is 15%-50% of the liquid level of the melt in the furnace body during production. The beneficial effect of adopting the above technical scheme is to ensure stable and orderly melting production during normal production, and reduce the fluctuation of the combustion and melting process caused by adding materials to the small space kiln.

In other embodiments of the present invention, the flue has an inclined part on the top of the furnace body, and a temperature sensor is provided on the upper part of the flue. The beneficial effects of adopting the above technical solution are: the inclined part can prevent the heat exchanger from being blocked, and the temperature measuring sensor is arranged on the upper part of the flue, which can detect the temperature in the kiln more reliably.

In other embodiments of the present invention, an ignition rod is provided on the burner, and a flame detector is provided on the ignition rod. The beneficial effect of adopting the above technical solution is that the burner is equipped with ignition rod and flame detection, and the ignition step can detect its own flame in real time.

In other embodiments of the present invention, an openable and closable furnace door is provided on the upper part of the side wall of the furnace body, and a firing gun mechanism is provided corresponding to the position of the furnace door. The firing gun mechanism includes a firing gun, a telescopic mechanism and a swing mechanism. The telescopic mechanism drives the igniter to telescopically move, and the swing mechanism drives the telescopic mechanism and the igniter to swing together. The beneficial effect of adopting the above technical solution is that the structure of the burner can be simplified, and the kiln configuration cost can be saved through the external single ignition gun.

In other embodiments of the present invention, it further includes a heat exchanger, the flue of the rock wool production kiln is connected to the heat exchanger and the flue gas treatment system, and the heat circulation pipeline of the heat exchanger is also Connected to the curing furnace; the thermal cycle pipeline of the heat exchanger is also connected to the raw material to be melted; the thermal cycle pipeline of the heat exchanger is also connected to the fuel gas supply pipe and the combustion-supporting gas supply pipe of the burner road. The beneficial effects of adopting the above technical scheme are: integrated submerged combustion kiln, rock wool production efficiency is high, quality is stable, the heat exchanger fully comprehensively reuses the flue gas heat, saves energy consumption, reduces production costs, and reduces pollution emission.

As shown in Figure 4, a rock wool production process includes the following steps:

High-temperature melting temperature control step: by adjusting the ratio of the flow rate of the burner gas to the combustion-supporting gas, the furnace temperature is controlled to be kept in the range of 1100-1600℃;

Fiber-forming step: through the fiberizer, blowing into fibers;

The beneficial effects of using the above technical solution are: with the help of the submerged combustion method, the flow ratio of the burner gas and the combustion-supporting gas adopts double cross-limiting control to ensure that the air-fuel ratio remains stable during the flow adjustment, the flow adjustment does not fluctuate, and the rock wool quality More stable and high production efficiency.

In other embodiments of the present invention, the ignition step includes the following steps:

The beneficial effect of adopting the above technical solution is that the burner is ignited by an external ignition gun, and when the kiln needs to be kept warm urgently, the ignition gun can be activated at any time for keeping the furnace warm.

Step B1: The burner has its own ignition rod, which has a flame detection function; each burner is ignited by its own ignition rod and continues to detect the flame. If the flame is extinguished, it will ignite again;

The beneficial effect of adopting the above technical scheme is that each burner is equipped with ignition rods, which improves the stability and reliability of ignition, and can detect the flame of each burner in real time.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and their purpose is to enable those of ordinary skill in the art to understand the content of the present invention and implement it, and cannot limit the protection scope of the present invention. All equivalent changes or modifications should be covered by the protection scope of the present invention.

Claims

A rock wool production kiln is characterized in that it comprises:

Furnace body, the outer wall of the furnace body is provided with a water cooling jacket;

A screw feeder installed at the first feeding port of the furnace body, the first feeding port being located below the liquid level of the melt in the furnace body during production;

A vibrating feeder installed at the second feeding port of the furnace body;

A burner, the burner is installed at the bottom of the furnace body or the side wall of the lower part of the furnace body, and the nozzle of the burner is immersed under the liquid surface of the melt in the furnace body;

The flue, which is used to discharge exhaust gas from the furnace body during production, is arranged on the upper part of the furnace body;

The forehearth is used for discharging the melt in the furnace.
The rock wool production kiln according to claim 1, wherein the burner comprises:

The burner body includes a nozzle panel, a gas chamber, and a combustion-supporting gas chamber. The nozzle panel is evenly provided with a plurality of nozzles. The gas chamber and the combustion-supporting gas chamber are respectively distributed on both sides under the nozzle panel, The nozzle panel is provided with an air guide hole communicating from the fuel gas chamber and the combustion-supporting gas chamber to the nozzle;

The cooling water channel surrounds the burner body. A circle of half partitions is provided in the cooling water channel. The water inlet and the water outlet of the cooling water channel are respectively located on both sides of the half partition, and the inlet The water outlet and the water outlet are respectively distributed at opposite ends of the burner body.
The rock wool production kiln according to claim 2, characterized in that the nozzle is a concave hemispherical groove, a gas guide hole connected to the gas chamber and a gas guide hole connected to the combustion-supporting gas chamber The two air guide holes are arranged in a straight line, and the two air guide holes are arranged tangentially to the nozzle, and the openings of the two air guide holes on the inner wall of the nozzle are arranged diagonally.
The rock wool production kiln according to claim 1, characterized in that, when the bottom area of the furnace body is less than 4m 2 , the number of burners is 2; the bottom area of the furnace body is based on the area of 2m 2 , each Increase the area of 2m 2 and increase the number of burners by one.
The rock wool production kiln according to claim 1, wherein the height of the first charging port from the bottom surface of the furnace body is 15%-50% of the height of the melt in the furnace body during production.
The rock wool production kiln according to claim 1, wherein the flue has an inclined part on the top of the furnace body, and a temperature sensor is provided on the upper part of the flue.
The rock wool production kiln according to claim 1, wherein the burner is provided with an ignition rod, and the ignition rod is provided with a flame detector.
The rock wool production kiln according to claim 1, wherein the upper part of the side wall of the furnace body is provided with an openable and closable furnace door, and an ignition gun mechanism is provided corresponding to the position of the furnace door, and the ignition gun mechanism includes a point A fire gun, a telescopic mechanism and a swing mechanism, wherein the telescopic mechanism drives the firing gun to telescopically move, and the swing mechanism drives the telescopic mechanism and the firing gun to swing together.
A rock wool production equipment, characterized in that it comprises the rock wool production kiln, fiberizer, cotton collector and curing furnace of any one of claims 1-8, and the material passage of the rock wool production kiln is connected To the fiberizer, the fiber blown by the fiberizer is pressed into a rock wool fiber sheet through the cotton collector, and then dried and solidified into rock wool by the curing oven.
The rock wool production equipment according to claim 9, further comprising a heat exchanger, the flue of the rock wool production kiln is connected to the heat exchanger and the flue gas treatment system, and the heat exchanger The thermal cycle pipeline of the heat exchanger is also connected to the curing furnace; the thermal cycle pipeline of the heat exchanger is also connected to the raw material storage to be melted; the thermal cycle pipeline of the heat exchanger is also connected to the gas supply pipe of the burner And combustion-supporting gas supply pipeline.
A rock wool production process, characterized in that it is based on the rock wool production equipment of claim 9 or 10, and includes the following steps:

Batching steps: Weigh the raw materials according to the material side, and add them to the silo of the screw feeder and the vibrating feeder after mixing;

Ignition steps: Ignite the burner through the ignition system to reach the set temperature in the kiln;

Feeding steps: Firstly, feed through the screw feeder and the vibrating feeder at the same time. When the melt level in the furnace reaches the set value, turn off the vibrating feeder, and adjust the feeding amount through the screw feeder to keep the feeding and discharge in balance , To keep the melt in the furnace within the set liquid level range;

High-temperature melting temperature control step: by adjusting the flow ratio of the burner gas and the combustion-supporting gas, the furnace temperature is controlled to be kept in the range of 1100-1600℃;

Fiber-forming step: through the fiberizer, blowing into fibers;

Cotton collection step: the fiber is pressed into a certain thickness of rock wool fiber through the cotton collector;

Curing step: drying and curing a certain thickness of rock wool fiber through a curing oven;

Slicing step: Pack the solidified rock wool slices according to the required specifications to make finished rock wool.
The rock wool production process according to claim 11, wherein the ignition step comprises the following steps:

Step A1: The igniter is pre-installed on the external mounting bracket of the kiln, and the mounting bracket is equipped with a telescopic mechanism and a swing mechanism; in turn, the igniter is close to the upper part of each burner to ignite the burner;

Step A2: After the last burner is ignited, stay on the upper part of the burner, turn off the natural gas of the igniter, retain the outflow of the combustion-supporting gas of the igniter, and continuously detect the flame through the flame detector on the igniter, and re-ignite if the flame goes out ；

Step A3: When the furnace temperature reaches 850°C or more, turn off the combustion-supporting gas of the ignition gun, exit the furnace, and close the furnace door.
The rock wool production process according to claim 11, wherein the ignition step comprises the following steps:

Step B1: The burner has its own ignition rod, which has a flame detection function; each burner is ignited by its own ignition rod and continues to detect the flame. If the flame is extinguished, it will ignite again;

Step B2: When the furnace temperature reaches 850°C or higher, the flame detection function is on standby, and the temperature of the furnace is detected by the temperature sensor.