Production device and production method for producing expanded material

Abstract

The invention relates to the technical field of expanded material equipment, in particular to an expanded furnace for producing perlite, which comprises a vertical furnace body, a horizontal furnace body, a plurality of gas spray guns, a cyclone separator and a gas heat exchanger sleeved on the cyclone separator, a feed port of the horizontal furnace body is communicated with a discharge port of the vertical furnace body, and a discharge port of the horizontal furnace body is communicated with a feed port of the cyclone separator; a gas inlet of the gas heat exchanger communicates with the external environment, and a gas outlet of the gas heat exchanger communicates with a gas inlet of the gas spray gun. The bottom of the horizontal furnace body is provided with a settling bin which is communicated with the horizontal furnace body and is used for providing residual expansion time for the expanded material; and the bottom of the settling bin is communicated with a discharge hole of the cyclone separator. The gas heat exchanger arranged on the cyclone separator in a sleeving mode is used for conducting heat exchange on high-temperature flue gas generated by the horizontal furnace body and normal-temperature combustion-supporting gas, the temperature of the combustion-supporting gas is increased, then the combustion efficiency and the utilization rate of fuel gas are improved, and therefore fuel energy consumption needed by expansion is reduced.

Description

Technical Field

[0001] This invention relates to the field of equipment technology for producing puffed materials, and more specifically, to a production apparatus and method for producing puffed materials. Background Technology

[0002] Expansion furnaces are the main equipment for producing expanded materials such as expanded vermiculite, expanded shale, expanded ceramsite, expanded glass, and expanded perlite. They work by burning coal gas or natural gas inside the furnace, causing the raw materials to expand at high temperatures, thus producing expanded materials. A large amount of high-temperature gas is generated inside the furnace. However, this high-temperature gas contains a large amount of dust that cannot be directly utilized, resulting in significant heat loss and waste.

[0003] In response, existing technologies mainly propose two waste heat utilization schemes. The first is as follows: [Announcement No.]

[0004] CN2898743Y and CN201503200U disclose a scheme for drying perlite sand in a preheating furnace using radiant heat generated by a horizontal furnace body; the second scheme, such as the scheme disclosed in CN102584065A, uses radiant heat generated by a horizontal furnace body to provide heat energy to a fuel supply system (such as drying pulverized coal) and to heat other heat-using devices (such as drying kilns in product workshops).

[0005] However, both of the above schemes essentially utilize the waste heat generated by the horizontal furnace to dry the materials or finished products needed in the production of expanded perlite. By reducing the additional energy consumption required for non-expansion, they reduce the total fuel energy consumption (total energy consumption = energy consumption required for expansion + additional energy consumption required for non-expansion), but do not reduce the fuel energy consumption required for expansion. Therefore, although the existing technology effectively utilizes waste heat, its utilization rate is still low, and there is room for improvement. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a production apparatus and method for producing puffed materials, so as to solve the technical problem that the existing technology does not utilize waste heat to reduce the fuel energy consumption required for puffing.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0008] A production apparatus for producing puffed materials includes a vertical furnace body, a horizontal furnace body located at the top of the vertical furnace body, several gas injection guns located at the bottom of the vertical furnace body, a cyclone separator located at the end of the horizontal furnace body, and a gas heat exchanger fitted onto the cyclone separator and providing high-temperature combustion gas to the gas injection guns; the feed inlet of the horizontal furnace body is connected to the discharge outlet of the vertical furnace body, and its discharge outlet is connected to the feed inlet of the cyclone separator; the gas inlet of the gas heat exchanger is connected to the external environment, and its outlet is connected to the gas inlet of the gas injection guns; a settling chamber is located at the bottom of the horizontal furnace body and is connected thereto, providing residual expansion time for the puffed materials, and the bottom of the settling chamber is connected to the discharge outlet of the cyclone separator.

[0009] Optionally, the settling chamber is a conical chamber with a larger upper end and a smaller lower end, used to extend the residual expansion time of the expanded material; a water tank sleeve is provided on the outer wall of the horizontal furnace body to reduce the internal temperature of the horizontal furnace body, and the water tank sleeve is fitted over the upper end of the settling chamber.

[0010] Optionally, the bottom of the vertical furnace body is provided with a buffer tank for holding the combustion-supporting gas; the air inlet of the buffer tank is connected to the air outlet of the gas heat exchanger, and its air outlet is connected to the air inlet of the gas spray gun.

[0011] Optionally, an oxygenation and pressurization device may be installed on the gas inlet pipe of the gas heat exchanger.

[0012] Optionally, it also includes a preheating furnace for drying raw materials, an elevator for feeding preheated raw materials into the vertical furnace body, a finished product silo for collecting puffed materials, and a purifier for post-treatment of waste gas; the air inlet of the preheating furnace is connected to the waste gas outlet of the cyclone separator, and its air outlet is connected to the air inlet of the purifier.

[0013] Optionally, the flame intersections of several gas-fired torches are located 30-50 cm below the material feeding intersection.

[0014] A production method for producing expanded materials, wherein the raw materials are expanded using the aforementioned production apparatus, and the raw materials are selected from any one of vermiculite, shale, ceramsite, waste glass, and perlite.

[0015] Optionally, the mixing ratio of the gas and the combustion-supporting gas introduced into the gas spray gun is (200-300):(2000-3900).

[0016] Optionally, the temperature of the expansion zone inside the vertical furnace is controlled at 900-1100℃, the temperature at the feed inlet of the horizontal furnace is controlled at 800-900℃, the temperature at the feed inlet of the cyclone separator is controlled at 600-700℃, and the temperature of the combustion-supporting gas entering the gas spray gun is controlled at 200-300℃.

[0017] Optionally, the temperature of the expanded material at the outlet of the settling chamber can be controlled at 450-500℃.

[0018] In summary, the present invention has the following beneficial effects: by using a gas heat exchanger mounted on a cyclone separator to exchange heat between the high-temperature flue gas generated by the horizontal furnace and the normal-temperature combustion gas, the temperature of the combustion gas is increased, thereby improving the combustion efficiency and utilization rate of the gas, and thus reducing the fuel energy consumption required for puffing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a partial structural schematic diagram of the vertical furnace body in this invention. Detailed Implementation

[0021] To make the objectives, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] This invention provides a production apparatus for producing puffed materials, such as... Figure 1-2 As shown, the furnace includes a vertical furnace body 1, a horizontal furnace body 2 located at the top of the vertical furnace body 1, several gas spray guns 3 located at the bottom of the vertical furnace body 1, a cyclone separator 4 located at the end of the horizontal furnace body 2, and a gas heat exchanger 5 fitted onto the cyclone separator 4 and providing high-temperature combustion gas to the gas spray guns 3. The feed inlet of the horizontal furnace body 2 is connected to the discharge outlet of the vertical furnace body 1, and its discharge outlet is connected to the feed inlet of the cyclone separator 4. The air inlet of the gas heat exchanger 5 is connected to the external environment, and its air outlet is connected to the air inlet of the gas spray guns 3. The bottom of the horizontal furnace body 2 is provided with a settling chamber 6 connected to it and providing residual expansion time for the expanded material. The bottom of the settling chamber 6 is connected to the discharge outlet of the cyclone separator 4.

[0024] Specifically, the vertical furnace body 1 is vertically installed on the ground via a support. The horizontal furnace body 2 is mounted on a support perpendicular to the ground, with one end installed at a 90-degree angle above the vertical furnace body 1 and connected thereto, and the other end connected to the cyclone separator 4. Six gas injection guns 3 are installed at the bottom of the vertical furnace body 1 via a support. The gas heat exchanger 5 is a partitioned heat exchanger, including tube heat exchangers and plate heat exchangers. Its heat exchange principle is that the two gases are separated by solid walls (such as tube walls or plates), and heat is transferred through the walls without direct contact. The gas heat exchanger 5 can be fitted onto the outer wall of the cyclone separator 4 or installed inside the cyclone separator 4. Specifically, the gas heat exchanger 5 can be a copper or stainless steel tube coiled around the outer wall of the cyclone separator 4, with its lower end as the air inlet and its upper end as the air outlet. Normal air, high oxygen content air, oxygen, and other room temperature combustion-supporting gases enter from the lower end of the gas heat exchanger 5, exchange heat with the high temperature exhaust gas inside the cyclone separator 4, and then flow out from the upper end of the gas heat exchanger 5. The gas is connected to the combustion-supporting gas interface of the gas spray gun 3 through the gas guide pipe. The combustion gas interface of the gas spray gun 3 is connected to a natural gas source, a petroleum gas source, or a coal gas source through the gas guide pipe.

[0025] The settling chamber 6 is sealed and connected to the bottom of the horizontal furnace body 2. Its main function is to collect the expanded perlite product. The principle is based on gravity settling: after the expanded perlite enters the settling chamber 6 with the airflow, the space expands and the airflow speed decreases. The perlite particles separate from the airflow due to their own gravity and settle to the bottom of the chamber, which is convenient for subsequent transportation to the finished product silo through the feeding pipe. At the same time, it can initially reduce the temperature of the perlite, which provides convenience for subsequent processing.

[0026] The working principle of this invention is as follows: Perlite ore preheated to 300-350℃ is lifted to the upper middle part of the vertical furnace body 1 by the hoist 12, and then the perlite ore is fed into the vertical furnace body 1 through the feeding pipe. The gas torch 3 ignites natural gas to generate high temperature and high pressure gas, which expands the perlite ore at 1000-1200℃, and the expanded perlite is blown to the horizontal furnace body 2. After the perlite expands, it passes through the horizontal furnace body 2 and the cyclone separator 4 and enters the feeding pipe, and is transported to the finished product silo 13 under the action of the induced draft fan 9. The flue gas separated by the cyclone separator 4 is first introduced into the preheating furnace 11, and then discharged by the fan to one or more subsequent purifiers 14. The temperature of the expansion zone of the vertical furnace body 1 during operation is 900-1100℃, the temperature measured at the feed inlet of the horizontal furnace body 2 is 800-900℃, the temperature measured at the feed inlet of the cyclone separator 4 is 600-700℃, and the temperature of the combustion-supporting gas entering the gas spray gun 3 is 200-300℃.

[0027] This invention utilizes a gas heat exchanger 5 mounted on a cyclone separator 4 to exchange heat between the high-temperature flue gas generated by the horizontal furnace 2 and the ambient-temperature combustion-supporting gas, thereby increasing the temperature of the combustion-supporting gas and improving the combustion efficiency and utilization rate of the gas. This reduces the fuel energy consumption required for expansion. The core principle is that when the preheated combustion-supporting gas (such as air) enters the combustion system, the heat it carries reduces the energy consumption used to heat the gas to its ignition point during natural gas combustion, allowing more fuel energy to be directly converted into effective heat energy. At the same time, the higher-temperature combustion-supporting gas can accelerate the mixing rate of natural gas and oxygen, promoting a more complete combustion reaction and reducing losses such as carbon monoxide and unburned hydrocarbons caused by incomplete combustion. This allows the heat released per unit volume of natural gas to be utilized more efficiently, ultimately achieving the effect of reduced fuel consumption and increased heat output under the same operating conditions.

[0028] Furthermore, such as Figure 1 As shown, the settling chamber 6 is a conical chamber with a larger upper end and a smaller lower end, which is used to extend the residual expansion time of the expanded material; the outer wall of the horizontal furnace body 2 is provided with a water tank sleeve 7 for reducing the internal temperature of the horizontal furnace body 2, and the water tank sleeve 7 is fitted over the upper end of the settling chamber 6.

[0029] Specifically, the expansion process of expanded perlite is completed in two stages. The first stage is high-temperature expansion in the expansion zone (900-1100℃) of the vertical furnace body 2. The second stage is residual expansion in the residual expansion temperature range of 600-800℃. During the expansion process, the flow velocity of the perlite should gradually slow down. Only by meeting the perlite expansion temperature and residual expansion time can the expanded perlite expand more fully. The settling chamber 6 is designed as a conical chamber with a larger upper end and a smaller lower end, which helps to extend the residual expansion time of the perlite. The water tank sleeve 7 can rapidly cool the flue gas discharged from the top of the vertical furnace body 1 from approximately 800-900℃ to 600-700℃ to prevent the expanded perlite from entering the finished product silo at excessively high temperatures. The expanded perlite flowing through the settling chamber 6 has a relatively higher density, while the expanded perlite flowing through the bottom outlet of the cyclone separator 4 has a relatively lower density. These two types of expanded perlite with different densities are transported to the finished product silo 13 by the induced draft fan 9.

[0030] Furthermore, the bottom of the vertical furnace body 1 is provided with a buffer tank 10 for holding the combustion-supporting gas; the air inlet of the buffer tank 10 is connected to the air outlet of the gas heat exchanger 5, and its air outlet is connected to the air inlet of the gas spray gun 3.

[0031] like Figure 1 As shown, the buffer tank 10 is installed at the bottom of the vertical furnace body 1. Its air inlet is connected to the air outlet of the gas heat exchanger 5 through a heat-insulating gas guide steel pipe (the outside of the steel pipe is wrapped with a heat insulation layer). This can improve the pressure stability of the combustion-supporting gas and prevent the gas pressure from fluctuating and causing adverse effects on puffing.

[0032] Furthermore, an oxygenation and pressurization device 8 is provided on the inlet pipe of the gas heat exchanger 5.

[0033] like Figure 1 As shown, the oxygenation and pressurization device 8 is installed on the air inlet pipe or air inlet of the gas heat exchanger 5. The oxygenation and pressurization device 8 can be any of the following: a blower, an oxygen-enriched pressurizing blower, a rotary pressurizing oxygen supply unit, or a combination of an air compressor and an oxygen generator. Preferably, a rotary pressurizing oxygen supply unit that can automatically maintain a stable mixed gas pressure is adopted. When the rotary pressurizing oxygen supply unit detects a decrease in the gas pressure in the mixed gas pressure, it automatically increases the pressure of the flame-retardant gas to maintain a stable mixed gas pressure.

[0034] Furthermore, it also includes a preheating furnace 11 for drying raw materials, an elevator 12 for feeding preheated raw materials into the vertical furnace body 1, a finished product bin 13 for collecting puffed materials, and a purifier 14 for post-treatment of waste gas; the air inlet of the preheating furnace 11 is connected to the waste gas outlet of the cyclone separator 4, and its outlet is connected to the air inlet of the purifier 14.

[0035] like Figure 1 As shown, the types of preheating furnace 11, elevator 12, and purifier 14 can be selected according to conventional techniques in the field of perlite expansion furnaces. The preheating furnace 11 utilizes the high-temperature exhaust gas discharged from the cyclone separator 4 to dry raw materials such as vermiculite sand, shale sand, ceramsite sand, (waste) glass sand, and perlite sand. The flow direction of the high-temperature exhaust gas within the preheating furnace 11 is opposite to the movement direction of the raw materials. The dried raw materials in the preheating furnace 11 are conveyed by a conveyor belt to the bottom feed hopper of the elevator 12, then lifted to a certain height and fed into the feed hopper of the vertical furnace body. After the high-temperature exhaust gas flows out of the preheating furnace 11, its temperature is reduced, and it then enters one or more purifiers 14 through a guide pipe for dust removal treatment. After passing the test, it is discharged into the external environment; the purifier 14 is preferably a multi-chamber 360° pulse bag filter.

[0036] Furthermore, several gas-fired nozzles are positioned 30-50 cm below the feeding nozzle intersection.

[0037] like Figure 2 As shown, in this embodiment, the net height of the vertical furnace body 1 (excluding the height occupied by the support, gas nozzle, and buffer tank at its bottom) is 8.34 meters, the diameter of the expansion belt section is 0.68 meters, and the feeding intersection ( Figure 2 The height of point A (as shown in the image) is 1.32 meters. Six gas torches 3 are mounted on a support at the bottom of the vertical furnace body 1 using an adjustable hinged design. The six gas torches 3 are evenly distributed around the circumference, with their respective flame intersection points (…). Figure 2 The location shown at point B is 30-50 cm below the material feeding intersection. This distance can be adjusted by adjusting the hinge angle of the gas spray gun 3.

[0038] A production method for producing expanded materials, wherein the raw materials are expanded using the above-mentioned production device, and the raw materials are selected from any one of vermiculite, shale, ceramsite, waste glass, and perlite.

[0039] Furthermore, the mixing ratio of the gas and the combustion-supporting gas introduced into the gas injection gun 3 is (200-300 Nm³ / s). 3 / h):(2000-3900Nm 3 / h).

[0040] Furthermore, the temperature of the expansion zone inside the vertical furnace body 1 is controlled at 900-1100℃, the temperature at the feed inlet of the horizontal furnace body 2 is controlled at 800-900℃, the temperature at the feed inlet of the cyclone separator 4 is controlled at 600-700℃, and the temperature of the combustion-supporting gas entering the gas spray gun 3 is controlled at 200-300℃.

[0041] Furthermore, the temperature of the expanded material at the discharge port of settling chamber 6 is controlled at 450-500℃.

[0042] The following uses the production of expanded perlite as an example. The target control parameters are: the temperature of the expansion zone is controlled at 900-1100℃, the temperature at the feed inlet of the horizontal furnace body 2 is controlled at 800-900℃, the temperature at the feed inlet of the cyclone separator 4 is controlled at 600-700℃, and the temperature of the combustion-supporting gas entering the gas spray gun 3 is controlled at 200-300℃. The effects of introducing room temperature air, high temperature air, and gas-mixing ratio into the gas spray gun 3 on the energy consumption required for expansion are verified. The results are shown in Table 1.

[0043] Table 1

[0044]

[0045] Table 1 shows the daily energy consumption required for expansion, representing the volume of natural gas consumed in 24 hours; daily output, representing the volume of expanded perlite produced in 24 hours; and the energy consumption ratio = daily energy consumption required for expansion / daily output, representing the volume of natural gas required to produce one cubic meter of expanded perlite. In terms of process, the temperature of the expansion zone is controlled to be maintained at 900-1100℃ and the temperature of the horizontal furnace inlet is maintained at 800-900℃ by adjusting the volume of material fed per unit time; the temperature of the cyclone separator 4 inlet is controlled to be maintained at 600-700℃ by adjusting the cooling water flow rate of the water tank sleeve 7.

[0046] The following conclusions can be drawn from Table 1:

[0047] (1) Based on Scheme 1, Schemes 2-5 maintain a constant oxygen concentration (21%) and a constant natural gas flow rate (200 Nm³). 3Based on the existing gas temperature (from room temperature to 300℃), the temperature of the combustion-supporting gas was gradually increased, and the flow rate of the combustion-supporting gas was appropriately increased to maintain a reasonable mixing ratio. Data shows that, while maintaining the core production conditions unchanged, as the temperature of the combustion-supporting gas increased from room temperature to 300℃, the unit expansion energy consumption ratio gradually decreased, ultimately decreasing by 13.6% (from 8.00 to 6.91). This indicates that increasing the temperature of the combustion-supporting gas helps improve combustion efficiency and reduce natural gas consumption.

[0048] (2) Scheme 6-9 continues to use the same stepped settings for the combustion-supporting gas temperature and oxygen content as Scheme 2-5, but increases the natural gas flow rate from 200 Nm³. 3 / h increased to 250Nm 3 / h, to accommodate higher daily production loads (from 600 to 690-710m) 3 Despite a significant increase in output (compared to schemes 2-5), schemes 6-9 still show a decreasing energy consumption ratio as the combustion gas temperature increases (from 8.70 to 8.45). Although the relative decrease is smaller than the previous group of schemes, it still demonstrates that the system of this invention retains energy-saving advantages under higher loads and possesses good scalability and stability. This also indicates that, under high-load operation, optimizing the oxygen content could be considered to further improve efficiency.

[0049] (3) In schemes 10-13, the flow rates of natural gas and combustion-supporting gas remain unchanged (consistent with schemes 6-9), but the oxygen concentration of the combustion-supporting gas is further increased to 30% (oxygen-enriched), and the temperature gradient of 100-300℃ is continued. Based on the introduction of oxygen-enriched combustion technology, the energy consumption ratio significantly decreases from 8.45 in scheme 9 to 6.86 in scheme 13, a reduction of 18.8%. This indicates that the synergistic effect of oxygen enrichment and high-temperature combustion-supporting gas significantly improves combustion efficiency, achieving further energy-saving optimization while maintaining high production levels. This verifies that the present invention has greater energy-saving potential when combined with an oxygen-enriched system, representing a significant improvement over traditional puffing processes.

[0050] (4) Schemes 14-17 maintained high-temperature, oxygen-enriched conditions, and under conditions of further increased production capacity, the energy consumption ratio still maintained an optimized trend (decreasing from 7.96 to 7.50). This indicates that the structure of the present invention is not only suitable for medium and low load conditions, but also achieves low unit energy consumption in high-yield, high-temperature puffing operations, demonstrating excellent scalability and energy efficiency stability. This result further enhances the practicality and forward-looking nature of the gas heat exchanger and oxygen-enriched synergistic system in the design of the present invention.

[0051] (5) Through comparative analysis of schemes 1-17, the present invention demonstrates stable and significant energy-saving advantages in terms of increasing the temperature of the combustion-supporting gas, oxygen-enriched combustion, and high-yield operation. The data fully proves that the present invention can effectively reduce the fuel energy consumption required for puffing and has good practical application value and promotion prospects. Among them, scheme 13 is the optimal implementation scheme of the present invention. While ensuring the puffing effect and output, it achieves the lowest unit natural gas consumption and does not significantly increase the temperature of the main puffing zone (compared to schemes 14-17), avoiding the potential adverse effects of excessively high temperature on furnace life and heat loss. At the same time, it does not require increasing the grade of refractory materials or additional insulation systems, and the overall equipment operation is more economical and controllable.

[0052] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A production apparatus for producing puffed materials, characterized in that, It includes a vertical furnace body, a horizontal furnace body located at the top of the vertical furnace body, several gas injection guns located at the bottom of the vertical furnace body, a cyclone separator located at the end of the horizontal furnace body, and a gas heat exchanger fitted onto the cyclone separator and providing high-temperature combustion gas to the gas injection guns; the feed inlet of the horizontal furnace body is connected to the discharge outlet of the vertical furnace body, and its discharge outlet is connected to the feed inlet of the cyclone separator; the gas inlet of the gas heat exchanger is connected to the external environment, and its outlet is connected to the gas inlet of the gas injection guns; a settling chamber is located at the bottom of the horizontal furnace body and is connected to it, providing residual expansion time for the expanded material, and the bottom of the settling chamber is connected to the discharge outlet of the cyclone separator.

2. The production apparatus according to claim 1, characterized in that, The settling chamber is a conical chamber with a larger top and a smaller bottom, used to extend the residual expansion time of the expanded material; a water tank sleeve is provided on the outer wall of the horizontal furnace body to reduce the internal temperature of the horizontal furnace body, and the water tank sleeve is fitted over the upper end of the settling chamber.

3. The production apparatus according to claim 1, characterized in that, The bottom of the vertical furnace body is equipped with a buffer tank for holding the combustion-supporting gas; the air inlet of the buffer tank is connected to the air outlet of the gas heat exchanger, and its air outlet is connected to the air inlet of the gas spray gun.

4. The production apparatus according to claim 1, characterized in that, The gas heat exchanger is equipped with an oxygenation and pressurization device on its inlet pipe.

5. The production apparatus according to claim 1, characterized in that, It also includes a preheating furnace for drying raw materials, an elevator for feeding preheated raw materials into the vertical furnace body, a finished product silo for collecting puffed materials, and a purifier for post-treatment of waste gas; the air inlet of the preheating furnace is connected to the waste gas outlet of the cyclone separator, and its air outlet is connected to the air inlet of the purifier.

6. The production apparatus according to claim 1, characterized in that, The flame intersections of several gas-fired spray guns are located 30-50 cm below the material feeding intersection.

7. A production method for producing puffed materials, characterized in that, The raw materials are expanded using the production apparatus described in any one of claims 1-6, wherein the raw materials are selected from any one of vermiculite, shale, ceramsite, waste glass, and perlite.

8. The production method according to claim 7, characterized in that, The mixing ratio of the gas and the combustion-supporting gas introduced into the gas spray gun is (200-300):(2000-3900).

9. The production method according to claim 7, characterized in that, The temperature of the expansion zone inside the vertical furnace is controlled at 900-1100℃, the temperature at the feed inlet of the horizontal furnace is controlled at 800-900℃, the temperature at the feed inlet of the cyclone separator is controlled at 600-700℃, and the temperature of the combustion-supporting gas entering the gas spray gun is controlled at 200-300℃.

10. The production method according to claim 7, characterized in that, The temperature of the expanded material at the outlet of the settling chamber is controlled at 450-500℃.

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