Method for preparing glass beads by mixing open-hearth liquid slag with blast furnace waste slag and continuous casting slag

Abstract

The invention relates to the technical field of glass bead production, and discloses a method for preparing glass beads by mixing open-hearth liquid slag with blast furnace waste slag and continuous casting slag, which comprises the following steps: S1, raw material pretreatment: pretreating the open-hearth liquid slag, firstly filtering the open-hearth liquid slag to remove impurities, and then introducing into an electrode heating furnace to heat, the method comprises the following steps: S1, preparing raw materials, S2, preparing raw materials, S3, preparing raw materials, S4, preparing raw materials, S4, preparing raw materials, S4, preparing raw materials, S4, preparing raw materials, S5, collecting and screening glass beads, and S6, detecting products and controlling quality. By adding sodium carbonate and borax for fine adjustment of components and performing ingredient calculation and mixing through accurate component analysis, the components of the mixed liquid slag can be adjusted, and the viscosity, surface tension and solidification characteristics of the mixed liquid slag are changed, so that the particle size distribution after air quenching granulation is optimized, the state and performance of a precipitated phase after slag liquid solidification are improved, and the production quality of glass beads is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of glass microbead production, in particular to a method for preparing glass microbeads by mixing open-hearth furnace liquid slag with blast furnace waste slag and continuous casting slag. Background Art

[0002] With the development of the steel industry, the output of metallurgical waste slag such as open-hearth slag, blast furnace slag and continuous casting slag continues to increase. These waste slags are rich in silicon, calcium, aluminum and other elements, and have the potential to become glass raw materials. Glass beads are widely used in many fields such as construction, transportation, electronics, etc., and their demand continues to rise. Traditional glass bead production relies on specific raw materials, and the reuse of metallurgical waste slag provides a new resource channel for the preparation of glass beads. It also conforms to the concept of resource recycling and sustainable development. In the traditional production of glass beads, the ingredients are based on empirical formulas or a relatively broad range of ingredients to produce glass beads.

[0003] However, in current technology, it is impossible to accurately adjust the composition of the mixed liquid slag, and it is difficult to control the viscosity and surface tension of the liquid slag, which makes it difficult to accurately control the size of the droplets formed by the liquid slag air quenching, resulting in poor consistency and unstable performance of the glass beads. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a method for preparing glass microspheres by mixing open-hearth liquid slag with blast furnace waste slag and continuous casting slag, which solves the problem that the composition of the mixed liquid slag cannot be accurately adjusted, resulting in poor consistency and unstable performance of the glass microspheres.

[0005] To achieve the above object, the present invention is implemented by the following technical scheme: a method for preparing glass microspheres by mixing open-hearth furnace liquid slag with blast furnace waste slag and continuous casting slag, comprising the following steps:

[0006] S1. Raw material pretreatment:

[0007] The open-hearth furnace slag pretreatment is to first filter and remove impurities from the open-hearth furnace slag, then pass it into the electrode heating furnace for heating, and at the same time stir the open-hearth furnace slag through a stirring device.

[0008] Pretreatment of blast furnace slag: The blast furnace slag is roughly crushed by a jaw crusher, and then the crushed blast furnace slag is sent to a ball mill for grinding. During this period, samples are taken regularly to detect the chemical composition content by X-ray fluorescence spectrometer

[0009] Continuous casting slag pretreatment: firstly, the continuous casting slag is crushed by a hammer crusher, then dried, and then ground. The main chemical components in the continuous casting slag are also analyzed by X-ray fluorescence spectrometer;

[0010] S2. Ingredient calculation and mixing:

[0011] According to the target composition of glass beads and the chemical composition of open-hearth furnace slag, blast furnace waste slag and continuous casting slag, the appropriate mixing ratio of the three is calculated. According to the calculated ratio, the blast furnace waste slag and continuous casting slag are slowly added to the open-hearth furnace slag. During the adding process, a mechanical stirring device is used to evenly mix the three to form a mixed liquid slag.

[0012] S3. Adjust the liquid slag properties:

[0013] The mixed liquid slag is analyzed for composition by X-ray fluorescence spectrometer, and additives are added according to the analysis results to fine-tune the composition. At the same time, the temperature and stirring speed are adjusted to change the viscosity and surface tension physical properties of the liquid slag.

[0014] S4, glass microsphere formation:

[0015] Through the wind quenching equipment, the mixed liquid slag with adjusted performance flows out through the special nozzle at the bottom, and at the same time, the flowing liquid slag is impacted by high-speed air flow from the side. The high-speed air flow quickly cools the droplets and solidifies them into glass micro beads;

[0016] S5. Collection and screening of glass beads:

[0017] The wind-quenched and granulated glass beads are collected by combining a cyclone separator and a gravity settling chamber, and then the collected glass beads are screened using vibrating screens of different mesh sizes;

[0018] S6. Product testing and quality control:

[0019] The screened glass beads are tested, and then each link in the production process is adjusted and optimized based on the test results. When the chemical composition does not meet the requirements, the batching link is adjusted. When the particle size distribution is not ideal, the parameters of the air quenching granulation link are adjusted.

[0020] Preferably, the aperture of the filter screen for filtering and removing impurities in the open-hearth furnace slag in S1 is 2-5 mm, and the heating temperature of the electrode heating furnace is 1300-1400° C.;

[0021] In the pretreatment of blast furnace waste slag, the particle size of the blast furnace waste slag after crushing is 1-2cm, and the particle size of the blast furnace waste slag after grinding is 1-2mm. The chemical components detected by X-ray fluorescence spectrometer include calcium oxide, silicon dioxide, aluminum oxide, magnesium oxide, and iron oxide;

[0022] In the pretreatment of continuous casting slag, a hammer crusher is used to crush the continuous casting slag into particles with a diameter of 1-3 cm and a grinding particle diameter of less than 0.5 mm. The main chemical components of the continuous casting slag include calcium oxide, silicon dioxide and calcium fluoride.

[0023] Preferably, in S2, open-hearth furnace liquid slag accounts for 50%-70%, blast furnace waste slag accounts for 15%-30%, and continuous casting slag accounts for 10%-20%. The stirring speed is set in the range of 200-300r / min.

[0024] Preferably, the additives in S3 include soda ash and borax, the temperature is adjusted to increase by 5-10°C each time, and 3-5 minutes are waited after the temperature adjustment to make the internal temperature of the liquid slag uniform, and the stirring speed is adjusted by 10-20r / min.

[0025] Preferably, the vertical distance between the nozzle and the air injection port in S4 is 20-50 cm, the air flow rate of the air injection port is 150-300 m / s, and the air temperature is 100-300°C.

[0026] Preferably, the cyclone separator in S5 rotates the airflow containing glass microspheres at high speed in the cyclone separator, and the airflow is thrown toward the wall of the device under the action of centrifugal force, and slides downward along the wall of the device to the collecting hopper at the bottom of the cyclone separator for collection. The gravity sedimentation chamber should be located after the cyclone separator, and the airflow discharged from the cyclone separator carries a small amount of glass microspheres that have not been completely separated, and settles to the bottom of the sedimentation chamber for collection. The sieve uses a 10-20 mesh sieve to remove larger agglomerates or incompletely granulated particles, and then uses an 80-100 mesh sieve to screen out glass microspheres that meet the particle size requirements.

[0027] Preferably, in S6, the chemical composition of the glass beads is detected by an X-ray fluorescence spectrometer, and the wind quenching and granulation step includes adjusting the air flow rate and the air temperature.

[0028] The present invention provides a method for preparing glass micro beads by mixing open-hearth furnace liquid slag with blast furnace waste slag and continuous casting slag. It has the following beneficial effects:

[0029] 1. The present invention can adjust the composition of the mixed liquid slag by adding soda ash and borax to fine-tune the composition, and calculate and mix the ingredients through accurate composition analysis, so as to change its viscosity, surface tension and solidification characteristics, optimize the particle size distribution after wind quenching and granulation, improve the state and performance of the precipitation phase after the slag liquid solidifies, and ensure the quality of glass microbead production.

[0030] 2. The present invention uses a cyclone separator to efficiently separate a large number of glass beads, ensuring their relative concentration and facilitating subsequent operations. It cooperates with a gravity sedimentation chamber to assist in collecting fine-particle beads. The combination of the two ensures complete collection and reduces losses. At the same time, the vibrating screen screens the collected glass beads and accurately classifies them according to particle size, thereby achieving the effect of improving the final quality of the glass beads and enhancing the economic benefits of production.

[0031] 3. The present invention uses detection and quality control based on the test results of chemical composition and particle size distribution, and feeds back to the production process for adjustment and optimization. If the chemical composition is not consistent, the ingredients are adjusted, and if the particle size distribution is not good, the air quenching parameters are adjusted to form a closed-loop quality control, which ensures the stability of product quality and the compliance of product performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The present invention is a flow chart of a method for preparing glass micro beads by mixing open-hearth furnace liquid slag with blast furnace waste slag and continuous casting slag. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Please see attached Figure 1 The embodiment of the present invention provides a method for preparing glass microspheres by mixing open-hearth furnace liquid slag with blast furnace waste slag and continuous casting slag, comprising the following steps:

[0035] S1. Raw material pretreatment:

[0036] The open-hearth slag pretreatment first filters the open-hearth slag to remove impurities, then passes it into the electrode heating furnace for heating, and at the same time stirs the open-hearth slag through a stirring device to remove large solid impurities in the open-hearth slag, such as incompletely melted refractory fragments, scaling in the furnace, etc., to avoid inclusions in the glass beads, so that the composition of the liquid slag for subsequent treatment is more uniform, providing a pure raw material basis for the production of high-quality glass beads. The electrode heating furnace heats the open-hearth slag to keep it in a suitable temperature range, and stirring can ensure that the open-hearth slag has good fluidity at high temperature, which is convenient for subsequent mixing with blast furnace waste slag and continuous casting slag, and is conducive to the production of glass beads with uniform composition and stable performance.

[0037] Pretreatment of blast furnace slag: The blast furnace slag is roughly crushed by a jaw crusher, and then the crushed blast furnace slag is sent to a ball mill for grinding. During this period, samples are taken regularly and the chemical composition content is detected by an X-ray fluorescence spectrometer. Blast furnace slag usually exists in large blocks. The jaw crusher uses the principle of mechanical extrusion to break large pieces of blast furnace slag into smaller pieces. This helps the subsequent processing steps, because smaller pieces are easier to further grind, which is beneficial to improving grinding efficiency and product quality. After that, the ball mill makes it easier for the chemical components in the slag to be exposed and participate in subsequent chemical reactions. In the formation process of glass beads, the larger specific surface area helps the slag to fully react with other raw materials, thereby better adjusting the composition and performance of the glass. The chemical composition content in the blast furnace slag is detected by an X-ray fluorescence spectrometer, which provides accurate data for subsequent batching calculations to ensure that it can be accurately proportioned according to the target composition of the glass beads when mixed with open-hearth liquid slag and continuous casting slag.

[0038] Continuous casting slag pretreatment, first the continuous casting slag is crushed by a hammer crusher, then dried, and then ground. The main chemical components in the continuous casting slag are also analyzed by X-ray fluorescence spectrometer. The hammer crusher breaks the continuous casting slag into smaller particles through the high-speed impact of the hammer head, which is helpful for subsequent drying, grinding and other processing steps, because smaller particles have a larger surface area, can be dried and ground more effectively, and can better ensure the uniformity of mixing when mixed with other raw materials later. At the same time, the main chemical components in the continuous casting slag are accurately analyzed by X-ray fluorescence spectrometer. The ratio of continuous casting slag, open-hearth liquid slag and blast furnace waste slag needs to be determined according to the target composition of glass beads. The chemical composition analysis results are the key basis for accurate proportioning.

[0039] S2. Ingredient calculation and mixing:

[0040] According to the target composition of glass beads and the chemical composition of open-hearth furnace slag, blast furnace waste slag and continuous casting slag, the appropriate mixing ratio of the three is calculated. According to the calculated ratio, the blast furnace waste slag and continuous casting slag are slowly added to the open-hearth furnace slag. During the adding process, a mechanical stirring device is used to evenly mix the three to form a mixed liquid slag.

[0041] Specifically, the raw material content measured by the X-ray fluorescence spectrometer analysis in S1 can be used to accurately calculate the proportion of mixed raw materials to meet the precise control of the glass microbead composition. The use of mechanical stirring equipment can enable the three types of waste slag to fully contact during the mixing process, ensuring that each component is evenly distributed in the mixed liquid slag, laying the foundation for the production of glass microbeads with stable quality and improving the molding quality of glass microbeads.

[0042] S3. Adjust the liquid slag properties:

[0043] The mixed liquid slag is analyzed for composition by X-ray fluorescence spectrometer, and additives are added according to the analysis results to fine-tune the composition. At the same time, the temperature and stirring speed are adjusted to change the viscosity and surface tension physical properties of the liquid slag.

[0044] Specifically, the X-ray fluorescence spectrometer can ensure that various chemical reactions may occur between the open-hearth slag, blast furnace waste slag and continuous casting slag during the ingredient mixing process. The composition analysis can monitor whether these reactions proceed as expected and whether the content of certain elements deviates from the expected value due to the reaction. At the same time, additives can be added according to the results of the composition analysis to adjust the various properties of the glass beads to meet the needs of different application scenarios.

[0045] S4, glass microsphere formation:

[0046] Through the wind quenching equipment, the mixed liquid slag with adjusted performance flows out through the special nozzle at the bottom, and at the same time, the flowing liquid slag is impacted by high-speed air flow from the side. The high-speed air flow quickly cools the droplets and solidifies them into glass micro beads;

[0047] Specifically, a high-speed air flow impacts the mixed liquid slag flowing out of the nozzle from the side. The air flow can quickly take away the heat of the liquid slag and blow the liquid slag into tiny droplets. In the process of the droplets being blown away, due to the effect of surface tension, the droplets tend to form a spherical shape, and then quickly solidify to form glass beads in a glassy state.

[0048] S5. Collection and screening of glass beads:

[0049] The wind-quenched and granulated glass beads are collected by combining a cyclone separator and a gravity settling chamber, and then the collected glass beads are screened using vibrating screens of different mesh sizes;

[0050] Specifically, the cyclone separator can quickly separate a large number of glass beads from the airflow with high separation efficiency, ensuring the relative concentration of the glass beads, facilitating the subsequent combined treatment with the glass beads collected by the gravity sedimentation chamber, and also facilitating the subsequent screening operation of the glass beads. The gravity sedimentation chamber can further collect the glass beads not completely collected by the cyclone separator, and assist in the collection of fine-particle glass beads. The combination of the two types of collection can ensure the integrity of the collection, reduce product losses, and improve the economic benefits of production. The vibrating screens of different mesh sizes can screen the collected glass beads and can accurately classify the glass beads according to the particle size to obtain glass bead products with uniform particle size that meet specific application requirements, thereby improving the final quality of the glass beads.

[0051] S6. Product testing and quality control:

[0052] The screened glass beads are tested, and then each link in the production process is adjusted and optimized based on the test results. When the chemical composition does not meet the requirements, the batching link is adjusted. When the particle size distribution is not ideal, the parameters of the air quenching granulation link are adjusted.

[0053] Specifically, the batching process directly determines the chemical composition of the glass beads. When it is detected that the chemical composition does not meet the requirements, adjusting the batching process can correct the composition deviation and control the content of various elements in the glass beads, thereby affecting the physical and chemical properties of the glass beads, such as hardness, refractive index, chemical stability, etc., to ensure that the glass beads have the expected chemical composition. The wind quenching and granulation process has a key influence on the particle size distribution of the glass beads. Adjusting the parameters of this process can change the droplet formation and cooling process, thereby forming a closed-loop quality control, thereby controlling the particle size and distribution of the glass beads, and thus improving the consistency of the product.

[0054] The aperture of the filter screen for filtering and removing impurities in the open-hearth furnace slag in S1 is 2-5mm, and the heating temperature of the electrode heating furnace is 1300-1400℃;

[0055] In the pretreatment of blast furnace waste slag, the particle size of the blast furnace waste slag after crushing is 1-2cm, and the particle size of the blast furnace waste slag after grinding is 1-2mm. The chemical components detected by X-ray fluorescence spectrometer include calcium oxide, silicon dioxide, aluminum oxide, magnesium oxide, and iron oxide;

[0056] In the pretreatment of continuous casting slag, the hammer crusher crushes the continuous casting slag into a particle size of 1-3 cm, and the grinding particle size is less than 0.5 mm. The main chemical components of the continuous casting slag include calcium oxide, silicon dioxide and calcium fluoride.

[0057] In S2, open-hearth furnace liquid slag accounts for 50%-70%, blast furnace waste slag accounts for 15%-30%, and continuous casting slag accounts for 10%-20%. The stirring speed setting range is 200-300r / min.

[0058] Specifically, open-hearth slag, blast furnace waste slag and continuous casting slag each have different chemical compositions. Open-hearth slag, as the main component, provides a basic chemical composition framework for glass beads. The components contained in blast furnace waste slag can supplement and adjust chemical elements related to certain properties of glass beads. Continuous casting slag can further fine-tune the overall chemical composition. By mixing the liquid slag in this proportion range, its viscosity, surface tension and solidification characteristics can be changed, and the final chemical composition of the glass beads can be precisely controlled to prepare high-quality glass beads to meet the requirements of the chemical properties of glass beads in different application scenarios.

[0059] The additives in S3 include soda ash and borax. The temperature is adjusted so that the temperature rise is controlled within 5-10°C each time, and wait for 3-5 minutes after the temperature adjustment to make the internal temperature of the liquid slag uniform. The stirring speed is adjusted up and down by 10-20r / min.

[0060] Specifically, soda ash and borax are both effective fluxes. In the process of glass formation, they can reduce the melting point and viscosity of the mixed liquid slag. The sodium ions in soda ash can destroy the complex chemical bond structure in the liquid slag, making it easier for structural units such as silicon-oxygen tetrahedrons to reorganize, thereby reducing the melting point of the system. Borates and other substances produced by the decomposition of borax during heating can change the chemical bond connection mode in the glass network structure, further reduce the viscosity of the liquid slag, and make the liquid slag have better fluidity at lower temperatures. Reducing bubble defects can improve the quality of glass beads, so that they can meet the use requirements in fields with high requirements on product quality such as optics and electronics, and improve the yield. The enhanced chemical stability and optimized thermal expansion coefficient make the glass beads more stable under different environmental conditions and extend their service life. At the same time, through small adjustments in temperature and stirring speed, the physical property state most suitable for glass bead molding can be gradually found.

[0061] In S4, the vertical distance between the nozzle and the air injection port is 20-50 cm, the air flow rate of the air injection port is 150-300 m / s, and the air temperature is 100-300°C.

[0062] The cyclone separator in S5 rotates the airflow containing glass microspheres at high speed in the cyclone separator, and the airflow is thrown to the wall of the device under the action of centrifugal force, and slides down along the wall to the collecting hopper at the bottom of the cyclone separator for collection. The gravity settling chamber should be located after the cyclone separator, and the airflow discharged from the cyclone separator carries a small amount of glass microspheres that have not been completely separated, and settles to the bottom of the settling chamber for collection. The screen uses a 10-20 mesh screen to remove larger agglomerates or incompletely granulated particles, and then uses an 80-100 mesh screen to screen out glass microspheres that meet the particle size requirements.

[0063] In S6, the chemical composition of the glass beads is detected by X-ray fluorescence spectrometer, and the wind quenching granulation process includes air flow rate adjustment and air temperature adjustment.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing glass microspheres by mixing open-hearth furnace liquid slag with blast furnace waste slag and continuous casting slag, characterized in that: The following steps are involved: S1. Raw material pretreatment: The open-hearth furnace slag pretreatment is to first filter and remove impurities from the open-hearth furnace slag, then pass it into the electrode heating furnace for heating, and at the same time stir the open-hearth furnace slag through a stirring device. Pretreatment of blast furnace slag: The blast furnace slag is roughly crushed by a jaw crusher, and then the crushed blast furnace slag is sent to a ball mill for grinding. During this period, samples are taken regularly to detect the chemical composition content by X-ray fluorescence spectrometer Continuous casting slag pretreatment: firstly, the continuous casting slag is crushed by a hammer crusher, then dried, and then ground. The main chemical components in the continuous casting slag are also analyzed by X-ray fluorescence spectrometer; S2. Ingredient calculation and mixing: According to the target composition of glass beads and the chemical composition of open-hearth furnace slag, blast furnace waste slag and continuous casting slag, the appropriate mixing ratio of the three is calculated. According to the calculated ratio, the blast furnace waste slag and continuous casting slag are slowly added to the open-hearth furnace slag. During the adding process, a mechanical stirring device is used to evenly mix the three to form a mixed liquid slag. S3. Adjust the liquid slag properties: The mixed liquid slag is analyzed for composition by X-ray fluorescence spectrometer, and additives are added according to the analysis results to fine-tune the composition. At the same time, the temperature and stirring speed are adjusted to change the viscosity and surface tension physical properties of the liquid slag. S4, glass microsphere formation: Through the wind quenching equipment, the mixed liquid slag with adjusted performance flows out through the special nozzle at the bottom, and at the same time, the flowing liquid slag is impacted by high-speed air flow from the side. The high-speed air flow quickly cools the droplets and solidifies them into glass micro beads; S5. Collection and screening of glass beads: The wind-quenched and granulated glass beads are collected by combining a cyclone separator and a gravity settling chamber, and then the collected glass beads are screened using vibrating screens of different mesh sizes; S6. Product testing and quality control: The screened glass beads are tested, and then each link in the production process is adjusted and optimized based on the test results. When the chemical composition does not meet the requirements, the batching link is adjusted. When the particle size distribution is not ideal, the parameters of the air quenching granulation link are adjusted.

2. The method for preparing glass microspheres by mixing open-hearth furnace liquid slag with blast furnace waste slag and continuous casting slag according to claim 1, characterized in that: The aperture of the filter screen for filtering and removing impurities in the open-hearth furnace slag in S1 is 2-5 mm, and the heating temperature of the electrode heating furnace is 1300-1400° C.; In the pretreatment of blast furnace waste slag, the particle size of the blast furnace waste slag after crushing is 1-2cm, and the particle size of the blast furnace waste slag after grinding is 1-2mm. The chemical components detected by X-ray fluorescence spectrometer include calcium oxide, silicon dioxide, aluminum oxide, magnesium oxide, and iron oxide; In the pretreatment of continuous casting slag, a hammer crusher is used to crush the continuous casting slag into particles with a diameter of 1-3 cm and a grinding particle diameter of less than 0.5 mm. The main chemical components of the continuous casting slag include calcium oxide, silicon dioxide and calcium fluoride.

3. The method for preparing glass microspheres by mixing open-hearth furnace liquid slag with blast furnace waste slag and continuous casting slag according to claim 1, characterized in that: In the S2, open-hearth furnace liquid slag accounts for 50%-70%, blast furnace waste slag accounts for 15%-30%, and continuous casting slag accounts for 10%-20%. The stirring speed is set in the range of 200-300r / min.

4. The method for preparing glass microspheres by mixing open-hearth furnace liquid slag with blast furnace waste slag and continuous casting slag according to claim 1, characterized in that: The additives in S3 include soda ash and borax. The temperature is adjusted to increase by 5-10°C each time, and wait for 3-5 minutes after the temperature adjustment to make the internal temperature of the liquid slag uniform. The stirring speed is adjusted by 10-20r / min.

5. The method for preparing glass microspheres by mixing open-hearth furnace liquid slag with blast furnace waste slag and continuous casting slag according to claim 1, characterized in that: The vertical distance between the nozzle and the air injection port in S4 is 20-50 cm, the air flow rate of the air injection port is 150-300 m / s, and the air temperature is 100-300°C.

6. The method for preparing glass microspheres by mixing open-hearth furnace liquid slag with blast furnace waste slag and continuous casting slag according to claim 1, characterized in that: The cyclone separator in S5 rotates the airflow containing glass microspheres at high speed in the cyclone separator, and the airflow is thrown toward the wall of the device under the action of centrifugal force, and slides down along the wall of the device to the collecting hopper at the bottom of the cyclone separator for collection. The gravity sedimentation chamber should be located after the cyclone separator, and the airflow discharged from the cyclone separator carries a small amount of glass microspheres that have not been completely separated, and settles to the bottom of the sedimentation chamber for collection. The sieve uses a 10-20 mesh sieve to remove larger agglomerates or incompletely granulated particles, and then uses an 80-100 mesh sieve to screen out glass microspheres that meet the particle size requirements.

7. The method for preparing glass microspheres by mixing open-hearth furnace liquid slag with blast furnace waste slag and continuous casting slag according to claim 1, characterized in that: In the S6, the chemical composition of the glass beads is detected by an X-ray fluorescence spectrometer, and the wind quenching granulation step includes adjusting the air flow rate and the air temperature.

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