Industrial slag glass fiber and preparation method thereof

Abstract

The invention discloses a glass fiber of industrial slag, and relates to the technical field of glass fiber manufacturing, the glass fiber comprises 60-80 parts of industrial slag, 10-20 parts of silica sand, 5-10 parts of quartz sand, 5-10 parts of calcium powder, 1-5 parts of aluminum powder, and 1-3 parts of other auxiliary agents. The invention also discloses a preparation method of the industrial slag glass fiber. The preparation method comprises the following steps: preparing raw materials; smelting the raw materials at high temperature; carrying out wire drawing treatment on the molten slag; carrying out heat treatment on the drawn glass fiber; carrying out surface treatment on the prepared glass fiber; and cutting the glass fiber to obtain a glass fiber product with the required length. The glass fiber based on industrial slag and the preparation method thereof provided by the invention not only have the advantages of environmental protection, energy conservation, low cost and the like, but also remarkably improve the performance of the glass fiber through an improved production process and surface treatment technology, meet the requirements of high-performance composite materials, and bring better use prospects.

Description

Technical Field

[0001] The invention relates to the technical field of glass fiber production, in particular to industrial slag glass fiber and a preparation method thereof. Background Art

[0002] As an important reinforcing material, glass fiber is widely used in construction, aerospace, automobile, wind power and other fields. Traditional glass fibers are mostly made of melted natural minerals. However, with the shortage of resources and the increase in environmental protection needs, the use of industrial waste to make glass fibers has become an important research direction. Industrial slag, as an important industrial by-product, is mainly composed of silicon oxide, aluminum oxide and calcium oxide, and has good solubility. Therefore, it can be used as an alternative raw material for glass fiber.

[0003] At present, some studies have shown that using industrial waste such as steel mill slag and cement kiln slag to make glass fiber can not only effectively treat these wastes and reduce environmental pollution, but also significantly reduce production costs. However, how to improve the performance of slag glass fiber and ensure its stability and heat resistance is still a technical difficulty in this field. Summary of the invention

[0004] In order to solve the above technical problems, a glass fiber of industrial slag and a preparation method thereof are provided. This technical solution solves the above problems.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is: The invention discloses an industrial slag glass fiber, which comprises 60-80 parts of industrial slag, 10-20 parts of silica sand, 5-10 parts of quartz sand, 5-10 parts of calcium powder, 1-5 parts of aluminum powder and 1-3 parts of other additives.

[0006] Preferably, the industrial slag includes steel plant slag, cement kiln slag and other industrial wastes, and the other additives include but are not limited to one or a combination of two of magnesium oxide, zinc oxide and borate.

[0007] Preferably, the glass fiber has a diameter of 1-20 microns and a length of several millimeters to several tens of millimeters. The glass fiber is obtained by melting slag and then drawing it through a wire drawing process, and the melting temperature is 1350°C-1450°C.

[0008] A method for preparing glass fiber from industrial slag, characterized in that the preparation steps are: S1. Prepare raw materials, including 60-80 parts of industrial slag, 10-20 parts of silica sand, 5-10 parts of quartz sand, 5-10 parts of calcium powder, 1-5 parts of aluminum powder and 1-3 parts of other additives, and ensure that all raw materials are evenly mixed; S2, smelting the raw materials at a high temperature of 1350°C-1450°C for 2-4 hours until uniform molten slag is formed; S3, subjecting the molten slag to wire drawing, using a wire drawing machine to draw the molten slag into fiber wire, the wire drawing speed is 1000m / min-1500m / min; S4, heat treating the drawn glass fiber at a temperature of 300°C-400°C for a holding time of 30min-60min to enhance the stability and heat resistance of the glass fiber; S5. Surface treatment is performed on the prepared glass fiber, and a surface coupling agent is used to enhance the bonding force between the glass fiber and the matrix material. The treatment temperature is 50° C.-80° C., and the treatment time is 10 min-20 min. S6. Cut the glass fiber to obtain a glass fiber product of required length.

[0009] Preferably, S2 specifically includes: Weigh industrial slag, silica sand, quartz sand, calcium powder, aluminum powder and other additives in proportion to ensure accurate proportion of each raw material; Place all raw materials into the mixing equipment and mix them evenly. The mixing time should be controlled between 30 minutes and 1 hour to ensure that all ingredients are completely evenly distributed; The mixed raw materials are transferred to a smelting furnace, the temperature of the smelting furnace is set to 1350°C-1450°C, and gradually heated to the set temperature. During the heating process, the heating rate is controlled; After reaching the set melting temperature, maintain the temperature between 1350°C-1450°C and melt for 2-4 hours; Determine whether the molten slag is completely melted by checking the sample, melt viscosity and appearance, and ensure that the molten slag is uniform without unmelted solid particles and uneven areas; After smelting, the molten slag is prepared for wire drawing, and the temperature of the melt is gradually reduced to a temperature range suitable for the wire drawing machine.

[0010] Preferably, the S3 specifically includes: Ensure that the molten slag has reached a temperature between 1300°C and 1450°C, introduce the molten slag into the melt feed port of the wire drawing machine, and adjust the parameters of the wire drawing machine, including the wire drawing speed, the temperature of the wire drawing head, and the traction force of the wire drawing machine; The wire drawing machine is started to make the molten slag pass through the wire drawing head of the wire drawing machine to be drawn into glass fiber wire. The wire drawing process is carried out in an oxygen-free atmosphere. By adjusting the drawing speed and the flow rate of molten slag, the diameter of the fiber is controlled to ensure that the diameter of the fiber is uniform and meets the product specification requirements; The drawn glass fiber filaments are quickly cooled by a rapid cooling system to ensure that they maintain the fiber shape and enhance their strength. After cooling, the glass fiber is collected into a reel and the quality of the drawing is checked, including the uniformity, diameter, strength and appearance of the fiber, to ensure that it meets the process requirements.

[0011] Preferably, the S4 specifically includes: The heat treatment temperature is set between 300°C and 400°C, and the drawn glass fibers are evenly placed in the heat treatment furnace; The glass fiber is heated to between 300°C and 400°C and maintained at this temperature for 30 minutes to 60 minutes; During the heat treatment process, strictly monitor the temperature in the furnace to ensure that the temperature fluctuation is within the predetermined range. If the furnace temperature fluctuates abnormally, adjust the heating equipment immediately; After the heat treatment is completed, the glass fiber is taken out of the heat treatment furnace and slowly cooled by natural cooling; After heat treatment, the glass fiber is checked for appearance, stability and heat resistance to ensure it has reached the required quality requirements.

[0012] Preferably, the S5 specifically includes: The coupling agent solution is formed by mixing a silane coupling agent and an epoxy resin, wherein the silane coupling agent is formed by compounding a fluorocarbon resin and nano-silicon dioxide; The coupling agent solution is heated to a temperature range of 50°C-80°C to increase its surface activity and ensure that it can effectively adsorb and react on the surface of the glass fiber; Immerse the drawn glass fiber in the surface coupling agent solution to ensure that the surface of the glass fiber is evenly covered with a layer of coupling agent. The immersion time is controlled between 10 minutes and 20 minutes to ensure that the surface of the glass fiber is fully treated. After soaking, take out the glass fiber, dry it gently, remove the excess coupling agent liquid on the surface, and ensure that only a thin layer of coupling agent remains on the surface of the glass fiber; Dry the surface treated glass fiber at 50°C-80°C for 10 to 20 minutes to remove residual moisture and ensure that the coupling agent is completely cured and bonded to the glass fiber surface.

[0013] Preferably, the S6 specifically includes: According to the diameter, hardness and required length of the glass fiber, set the corresponding cutting speed and tool pressure; Feed the surface treated glass fiber into the cutting equipment, and accurately cut the glass fiber according to the preset length. The cutting length range is adjusted according to product requirements; The cut glass fibers are collected by a conveyor belt and packaged for storage.

[0014] Preferably, the glass fiber contains 1% to 5% aluminum, 5% to 10% calcium, and 10% to 20% silicon, which meets the reinforcement requirements of high-performance composite materials.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The industrial slag-based glass fiber and the preparation method thereof provided by the present invention not only have the advantages of environmental protection, energy saving, and low cost, but also significantly improve the performance of the glass fiber through improved production process and surface treatment technology, thereby meeting the demand for high-performance composite materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a preparation process framework diagram of the present invention. DETAILED DESCRIPTION

[0017] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0018] Embodiment 1: S1. Prepare raw materials, including 60 parts of industrial slag, 15 parts of silica sand, 7.5 parts of quartz sand, 7.5 parts of calcium powder, 3 parts of aluminum powder and 2 parts of other additives, and ensure that all raw materials are evenly mixed; S2, smelting the raw materials at a high temperature of 1350°C-1450°C for 2-4 hours until uniform molten slag is formed; S3, subjecting the molten slag to wire drawing, using a wire drawing machine to draw the molten slag into fiber wire, the wire drawing speed is 1000m / min-1500m / min; S4, heat treating the drawn glass fiber at a temperature of 300°C-400°C for a holding time of 30min-60min to enhance the stability and heat resistance of the glass fiber; S5. Surface treatment is performed on the prepared glass fiber, and a surface coupling agent is used to enhance the bonding force between the glass fiber and the matrix material. The treatment temperature is 50° C.-80° C., and the treatment time is 10 min-20 min. S6. Cut the glass fiber to obtain a glass fiber product of required length.

[0019] Embodiment 2: S1. Prepare raw materials, including 70 parts of industrial slag, 12 parts of silica sand, 8 parts of quartz sand, 8 parts of calcium powder, 2 parts of aluminum powder and 3 parts of other additives, and ensure that all raw materials are evenly mixed; S2, smelting the raw materials at a high temperature of 1350°C-1450°C for 2-4 hours until uniform molten slag is formed; S3, subjecting the molten slag to wire drawing, using a wire drawing machine to draw the molten slag into fiber wire, the wire drawing speed is 1000m / min-1500m / min; S4, heat treating the drawn glass fiber at a temperature of 300°C-400°C for a holding time of 30min-60min to enhance the stability and heat resistance of the glass fiber; S5. Surface treatment is performed on the prepared glass fiber, and a surface coupling agent is used to enhance the bonding force between the glass fiber and the matrix material. The treatment temperature is 50° C.-80° C., and the treatment time is 10 min-20 min. S6. Cut the glass fiber to obtain a glass fiber product of required length.

[0020] Embodiment 3: S1. Prepare raw materials, including 80 parts of industrial slag, 10 parts of silica sand, 10 parts of quartz sand, 10 parts of calcium powder, 5 parts of aluminum powder and 1 part of other additives, and ensure that all raw materials are evenly mixed; S2, smelting the raw materials at a high temperature of 1350°C-1450°C for 2-4 hours until uniform molten slag is formed; S3, subjecting the molten slag to wire drawing, using a wire drawing machine to draw the molten slag into fiber wire, the wire drawing speed is 1000m / min-1500m / min; S4, heat treating the drawn glass fiber at a temperature of 300°C-400°C for a holding time of 30min-60min to enhance the stability and heat resistance of the glass fiber; S5. Surface treatment is performed on the prepared glass fiber, and a surface coupling agent is used to enhance the bonding force between the glass fiber and the matrix material. The treatment temperature is 50° C.-80° C., and the treatment time is 10 min-20 min. S6. Cut the glass fiber to obtain a glass fiber product of required length.

[0021] Comparative Example 1: S1: Raw material preparation: 50 parts of industrial slag, 20 parts of silica sand, 10 parts of quartz sand, 10 parts of calcium powder, 5 parts of aluminum powder and 2 parts of other additives, mix well and then proceed with subsequent treatment; S2: high temperature smelting, the smelting temperature is 1300℃, and the smelting time is 4 hours; S3: Wire drawing, the wire drawing speed is 1000 m / min, to obtain thin and long glass fiber filaments; S4: performing heat treatment at a temperature of 300° C. for 30 minutes, and using a silane coupling agent for surface modification at a temperature of 50° C. for 10 minutes; S5: Glass fiber cut into 5 mm lengths.

[0022] The following table shows the properties of glass fibers prepared in different embodiments.

[0023] In summary, the advantages of the present invention are: The present invention utilizes industrial wastes such as steel mill slag and cement kiln slag as main raw materials, and can effectively utilize these industrial by-products, which not only reduces the accumulation of wastes, but also effectively reduces the energy consumption and raw material costs of producing glass fibers, which is in line with the concepts of green manufacturing and circular economy. By rationally mixing raw materials such as slag, silica sand, quartz sand, calcium powder and aluminum powder, and through high-temperature smelting and wire drawing processes, glass fibers with high strength and excellent thermal stability can be produced. The use of high-temperature smelting technology effectively removes harmful components in the slag, while ensuring the uniformity and stability of the glass fibers. By using a surface coupling agent to treat the glass fiber surface, the bonding force between the glass fiber and the matrix material can be significantly enhanced, thereby improving the mechanical properties of the composite material and meeting the needs of high-performance composite materials; By optimizing the drawing speed and drawing process, efficient glass fiber production can be achieved. In addition, by controlling the appropriate heat treatment temperature and time, the thermal stability of glass fiber is further improved, making it suitable for applications in more high-temperature environments. The use of industrial slag and other waste materials to replace traditional natural minerals reduces the cost of purchasing raw materials. At the same time, the optimized production process and surface treatment methods improve the performance of glass fiber, making it highly competitive in the market in terms of cost and performance.

[0024] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A glass fiber made of industrial slag, characterized in that: Glass fiber includes: 60-80 parts of industrial slag, 10-20 parts of silica sand, 5-10 parts of quartz sand, 5-10 parts of calcium powder, 1-5 parts of aluminum powder and 1-3 parts of other additives.

2. The glass fiber of industrial slag according to claim 1, characterized in that: The industrial slag includes steel plant slag, cement kiln slag and other industrial wastes, and the other additives include but are not limited to one or a combination of two of magnesium oxide, zinc oxide and borate.

3. The glass fiber of industrial slag according to claim 2, characterized in that: The glass fiber has a diameter of 1-20 microns and a length of several millimeters to several tens of millimeters. The glass fiber is obtained by melting slag and then drawing it through a wire drawing process, and the melting temperature is 1350°C-1450°C.

4. A method for preparing glass fiber from industrial slag, characterized in that: The preparation steps are: S1. Prepare raw materials, including 60-80 parts of industrial slag, 10-20 parts of silica sand, 5-10 parts of quartz sand, 5-10 parts of calcium powder, 1-5 parts of aluminum powder and 1-3 parts of other additives, and ensure that all raw materials are evenly mixed; S2, smelting the raw materials at a high temperature of 1350°C-1450°C for 2-4 hours until uniform molten slag is formed; S3, subjecting the molten slag to wire drawing, using a wire drawing machine to draw the molten slag into fiber wire, the wire drawing speed is 1000m / min-1500m / min; S4, heat treating the drawn glass fiber at a temperature of 300°C-400°C for a holding time of 30min-60min to enhance the stability and heat resistance of the glass fiber; S5. Surface treatment is performed on the prepared glass fiber, and a surface coupling agent is used to enhance the bonding force between the glass fiber and the matrix material. The treatment temperature is 50° C.-80° C., and the treatment time is 10 min-20 min. S6. Cut the glass fiber to obtain a glass fiber product of required length.

5. The method for preparing glass fiber from industrial slag according to claim 4, characterized in that: The S2 specifically includes: Weigh industrial slag, silica sand, quartz sand, calcium powder, aluminum powder and other additives in proportion to ensure accurate proportion of each raw material; Place all raw materials into the mixing equipment and mix them evenly. The mixing time should be controlled between 30 minutes and 1 hour to ensure that all ingredients are completely evenly distributed; The mixed raw materials are transferred to a smelting furnace, the temperature of the smelting furnace is set to 1350°C-1450°C, and gradually heated to the set temperature. During the heating process, the heating rate is controlled; After reaching the set melting temperature, maintain the temperature between 1350°C-1450°C and melt for 2-4 hours; Determine whether the molten slag is completely melted by checking the sample, melt viscosity and appearance, and ensure that the molten slag is uniform without unmelted solid particles and uneven areas; After smelting, the molten slag is prepared for wire drawing, and the temperature of the melt is gradually reduced to a temperature range suitable for the wire drawing machine.

6. The method for preparing glass fiber from industrial slag according to claim 5, characterized in that: The S3 specifically includes: Ensure that the molten slag has reached a temperature between 1300°C and 1450°C, introduce the molten slag into the melt feed port of the wire drawing machine, and adjust the parameters of the wire drawing machine, including the wire drawing speed, the temperature of the wire drawing head, and the traction force of the wire drawing machine; The wire drawing machine is started to make the molten slag pass through the wire drawing head of the wire drawing machine to be drawn into glass fiber wire. The wire drawing process is carried out in an oxygen-free atmosphere. By adjusting the drawing speed and the flow rate of molten slag, the diameter of the fiber is controlled to ensure that the diameter of the fiber is uniform and meets the product specification requirements; The drawn glass fiber filaments are quickly cooled by a rapid cooling system to ensure that they maintain the fiber shape and enhance their strength. After cooling, the glass fiber is collected into a reel and the quality of the drawing is checked, including the uniformity, diameter, strength and appearance of the fiber, to ensure that it meets the process requirements.

7. The method for preparing glass fiber from industrial slag according to claim 6, characterized in that: The S4 specifically includes: The heat treatment temperature is set between 300°C and 400°C, and the drawn glass fibers are evenly placed in the heat treatment furnace; The glass fiber is heated to between 300°C and 400°C and maintained at this temperature for 30 minutes to 60 minutes; During the heat treatment process, strictly monitor the temperature in the furnace to ensure that the temperature fluctuation is within the predetermined range. If the furnace temperature fluctuates abnormally, adjust the heating equipment immediately; After the heat treatment is completed, the glass fiber is taken out of the heat treatment furnace and slowly cooled by natural cooling; After heat treatment, the glass fiber is checked for appearance, stability and heat resistance to ensure it has reached the required quality requirements.

8. The method for preparing glass fiber from industrial slag according to claim 7, characterized in that: The S5 specifically includes: The coupling agent solution is formed by mixing a silane coupling agent and an epoxy resin, wherein the silane coupling agent is formed by compounding a fluorocarbon resin and nano-silicon dioxide; The coupling agent solution is heated to a temperature range of 50°C-80°C to increase its surface activity and ensure that it can effectively adsorb and react on the surface of the glass fiber; Immerse the drawn glass fiber in the surface coupling agent solution to ensure that the surface of the glass fiber is evenly covered with a layer of coupling agent. The immersion time is controlled between 10 minutes and 20 minutes to ensure that the surface of the glass fiber is fully treated. After soaking, take out the glass fiber, dry it gently, remove the excess coupling agent liquid on the surface, and ensure that only a thin layer of coupling agent remains on the surface of the glass fiber; Dry the surface treated glass fiber at 50°C-80°C for 10 to 20 minutes to remove residual moisture and ensure that the coupling agent is completely cured and bonded to the glass fiber surface.

9. The method for preparing glass fiber from industrial slag according to claim 8, characterized in that: The S6 specifically includes: According to the diameter, hardness and required length of the glass fiber, set the corresponding cutting speed and tool pressure; Feed the surface treated glass fiber into the cutting equipment, and accurately cut the glass fiber according to the preset length. The cutting length range is adjusted according to product requirements; The cut glass fibers are collected by a conveyor belt and packaged for storage.

10. The method for preparing glass fiber from industrial slag according to claim 9, characterized in that: The glass fiber contains 1% to 5% aluminum, 5% to 10% calcium, and 10% to 20% silicon, meeting the reinforcement requirements of high-performance composite materials.

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