A fused-cast basalt material for photovoltaic support and preparation method thereof

Abstract

The present invention relates to a fused-cast basalt photovoltaic support material and a preparation method thereof. The material comprises 80-90 parts of natural basalt, 6-18 parts of inorganic non-metallic fibers, and 2-6 parts of additives, and the preparation method comprises the following steps: crushing; smelting: adding the crushed basalt to an electric furnace for smelting, and fully melting the basalt to form a clarified molten liquid; casting: entering a heat preservation stage, first evenly arranging the inorganic non-metallic fibers in a specific mold, and then casting the molten liquid into the mold; cooling: heat-insulating and cooling the molten casting to room temperature; demoulding: after cooling to room temperature, demoulding is performed to produce a fused-cast basalt photovoltaic support. The fused-cast basalt photovoltaic support material obtained by this scheme has high performance, strong weather resistance and corrosion resistance, high cost performance, and long service life, which can well meet the use requirements of photovoltaic supports.

Description

Technical Field

[0001] The invention relates to a fused-cast basalt material for a photovoltaic bracket and a preparation method thereof, and belongs to the field of ceramic materials. Background Art

[0002] Photovoltaic brackets are crucial components for securing solar panels. Existing bracket materials are typically metal, but these lack electrical insulation, corrosion resistance, high-temperature resistance, and aging resistance. They are unsuitable for acidic, alkaline, and salty environments, as well as for highly corrosive desert saline-alkali soils. Their service life falls short of the 25-year design requirement for photovoltaic solar panels, severely impacting and impacting photovoltaic power generation efficiency. Both the environmental impact of the production process and the subsequent lifespan and environmental adaptability are no longer sufficient, making the use of environmentally friendly basalt materials in photovoltaic brackets highly desirable. Currently, basalt photovoltaic brackets are made by first drawing basalt fiber, then adding organic resin to create a basalt fiber composite photovoltaic bracket product.

[0003] The patent application publication number CN 108929523 A, "A high-performance composite material for photovoltaic brackets and its preparation method," uses a pultrusion process, with basalt unidirectional fibers and multi-axial cloth as reinforcements. The fibers are impregnated into a matrix resin through an impregnation process, and then preformed and molded. After gelation and curing under appropriate temperature and traction conditions, a high-performance composite material suitable for photovoltaic brackets is obtained.

[0004] The patent application publication number CN106046694 A, "A basalt fiber composite photovoltaic bracket profile and a photovoltaic panel bracket made thereof", is made of basalt fiber with a specific component content, which is surface treated and impregnated with a matrix resin in sequence. It is based on the good chemical stability, thermal stability, corrosion resistance and mechanical strength of basalt fiber.

[0005] However, basalt fiber composite materials containing organic resins have weaknesses such as poor weather resistance, aging resistance and UV resistance. Summary of the Invention

[0006] In order to prepare a new basalt material for photovoltaic supports that has better overall cost-effectiveness and high performance in harsh environments, the present invention proposes a new solution.

[0007] The scheme of the present invention is as follows:

[0008] A fused-cast basalt material for a photovoltaic support, characterized in that, calculated by weight, it comprises 80-90 parts of natural basalt, 6-18 parts of inorganic non-metallic fibers, and 2-6 parts of an additive.

[0009] Furthermore, the inorganic non-metallic fiber is one or a mixture of basalt fiber, glass fiber, and carbon fiber.

[0010] Furthermore, the auxiliary agent is one or a mixture of kaolin, clay, and waste glass.

[0011] The method for preparing the fused-cast basalt material of the present invention comprises the following steps:

[0012] (1) Crushing: Put the basalt ore and additives into the crusher and crush them to less than 1mm;

[0013] (2) Melting: Melting the crushed basalt and additives until the basalt is fully melted to form a clear melt;

[0014] (3) Casting: first, the inorganic fibers are evenly arranged in a mold, and then the melt is cast into the mold;

[0015] (4) Cooling: First, cool the molten casting to room temperature;

[0016] (5) Demolding: After cooling down to room temperature, demolding is performed to produce fused-cast basalt photovoltaic bracket products.

[0017] Furthermore, the smelting is specifically performed by heating the temperature from room temperature to 1050°C at a rate of 20°C / min, and then heating the temperature from 1050°C to a smelting holding temperature of 1400-1500°C at a rate of 10°C / min, and the smelting time is 60-150 minutes.

[0018] Furthermore, the cooling rate is 0.5-0.8°C / min. Beneficial effects

[0019] The present invention adopts the melt-casting method to form basalt photovoltaic bracket products in one step, which effectively avoids the shortcomings of the traditional process of complex procedures, large processing volume, and time-consuming. It can provide a new processing technology with stable production capacity, controllable quality, and low unit cost for high-precision, complex-shaped photovoltaic bracket products, and avoids the weaknesses of poor weather resistance, aging resistance, and UV resistance of basalt fiber composite materials containing organic resins. The melt-cast basalt photovoltaic bracket obtained by this solution has the following advantages: High strength: The hardness of basalt and the high strength of inorganic fibers give the photovoltaic bracket a good load-bearing capacity. Corrosion resistance: The inorganic fiber has corrosion resistance, which enables the photovoltaic bracket to be used in harsh environments for a long time. Good high-temperature performance: The high-temperature resistance of basalt and kaolin enables the photovoltaic bracket to maintain stable performance in high-temperature environments. Recyclable: Basalt and kaolin are natural materials and can be recycled, reducing environmental load. They are cost-effective and have a long service life, which can well meet the use requirements of photovoltaic brackets. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the fused-cast basalt photovoltaic support prepared in the present invention. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0022] The raw materials used in the embodiments of the present invention are all provided by Xinjiang Northwest Xuanwu New Materials Technology Co., Ltd. Example 1

[0023] A fused-cast basalt photovoltaic support material comprises, by weight, 90 parts of natural basalt, 7 parts of basalt fiber, and 3 parts of clay powder.

[0024] The preparation method thereof comprises the following steps:

[0025] (1) Crushing: Put the basalt ore and clay powder into the crusher and crush them to less than 1mm;

[0026] (2) Melting: Add crushed basalt and clay powder into an electric melting furnace for melting. Heat the temperature from room temperature to 1050°C at a rate of 20°C / min, and then heat it from 1050°C to the melting holding temperature of 1400°C at a rate of 10°C / min. The melting time is 150 minutes. The basalt is fully melted to form a clear melt.

[0027] (3) Casting: Entering the insulation stage, the basalt fibers are evenly arranged in the mold, and then the molten metal is cast into the mold;

[0028] (4) Cooling: First, cool the molten casting to room temperature;

[0029] (5) Demolding: After cooling to room temperature at a cooling rate of 0.5℃ / min, demolding is performed to produce fused cast basalt photovoltaic bracket products, such as Figure 1 shown.

[0030] According to GB / T 2997-2015 and GB / T 1447-2005, the performance indicators obtained from the test are: product density 2.73 g / cm3, tensile strength 1200 MPa, and compressive elastic modulus 55 GPa. Example 2

[0031] A fused-cast basalt photovoltaic support material comprises, by weight, 80 parts of natural basalt, 15 parts of glass fiber, and 5 parts of waste glass powder.

[0032] The preparation method thereof comprises the following steps:

[0033] (1) Crushing: Put the basalt ore and waste glass powder into the crusher and crush them to less than 1mm;

[0034] (2) Melting: Add crushed basalt and waste glass powder into an electric melting furnace for melting. Heat the temperature from room temperature to 1050°C at a rate of 20°C / min, and then heat the temperature from 1050°C to the melting holding temperature of 1500°C at a rate of 10°C / min. The melting time is 60 minutes. The basalt is fully melted to form a clear melt.

[0035] (3) Casting: Entering the heat preservation stage, the glass fibers are evenly arranged in the mold, and then the molten liquid is cast into the mold;

[0036] (4) Cooling: First, cool the molten casting to room temperature;

[0037] (5) Demolding: After cooling to room temperature at a cooling rate of 0.7°C / min, demolding is performed to produce a fused-cast basalt photovoltaic bracket product.

[0038] According to GB / T 2997-2015 and GB / T 1447-2005, the performance indicators obtained from the test are: product density 2.62 g / cm3, tensile strength 1100 MPa, and compressive elastic modulus 52 GPa. Example 3

[0039] A fused-cast basalt photovoltaic support material comprises, by weight, 88 parts of natural basalt from a certain area in Sichuan, 6 parts of carbon fiber, and 6 parts of kaolin.

[0040] The preparation method thereof comprises the following steps:

[0041] (1) Crushing: Put the basalt ore and kaolin into the crusher and crush them to less than 1 mm;

[0042] (2) Melting: Add crushed basalt and kaolin into an electric melting furnace for melting. Heat the temperature from room temperature to 1050°C at a rate of 20°C / min, and then heat it from 1050°C to the melting holding temperature of 1500°C at a rate of 10°C / min. The melting time is 100 minutes. The basalt is fully melted to form a clear melt.

[0043] (3) Casting: Entering the heat preservation stage, the glass fibers are evenly arranged in the mold, and then the molten liquid is cast into the mold;

[0044] (4) Cooling: First, cool the molten casting to room temperature;

[0045] (5) Demolding: After cooling to room temperature at a cooling rate of 0.7°C / min, demolding is performed to produce a fused-cast basalt photovoltaic bracket product.

[0046] According to GB / T 2997-2015 and GB / T 1447-2005, the performance indicators obtained from the test are: product density 2.65 g / cm3, tensile strength 1150 MPa, and compressive elastic modulus 56.5 GPa. Example 4

[0047] A fused-cast basalt photovoltaic support material comprises, by weight, 80 parts of natural basalt, 6 parts of carbon fiber, 12 parts of basalt fiber, and 2 parts of clay powder.

[0048] The preparation method thereof comprises the following steps:

[0049] (1) Crushing: Put the basalt ore and clay powder into the crusher and crush them to less than 1mm;

[0050] (2) Melting: Add crushed basalt and clay powder into an electric melting furnace for melting. Heat the temperature from room temperature to 1050°C at a rate of 20°C / min, and then heat it from 1050°C to the melting holding temperature of 1500°C at a rate of 10°C / min. The melting time is 60 minutes. The basalt is fully melted to form a clear melt.

[0051] (3) Casting: Entering the heat preservation stage, the glass fibers are evenly arranged in the mold, and then the molten liquid is cast into the mold;

[0052] (4) Cooling: First, cool the molten casting to room temperature;

[0053] (5) Demolding: After cooling to room temperature at a cooling rate of 0.7°C / min, demolding is performed to produce a fused-cast basalt photovoltaic bracket product.

[0054] According to GB / T 2997-2015 and GB / T 1447-2005, the performance indicators obtained from the test are: product density 2.63 g / cm3, tensile strength 1140 MPa, and compressive elastic modulus 54.5 GPa.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fused basalt material for photovoltaic brackets, characterized in that: According to weight parts, it is composed of 80-90 parts of natural basalt, 6-18 parts of inorganic non-metallic fiber, and 2-6 parts of additives; The preparation method thereof comprises the following steps: (1) Crushing: Put the basalt ore and additives into the crusher and crush them to less than 1mm; (2) Melting: Melting the crushed basalt and additives until the basalt is fully melted to form a clear melt; (3) Casting: first, the inorganic fibers are evenly arranged in a mold, and then the melt is cast into the mold; (4) Cooling: Cool the molten casting to room temperature; (5) Demolding: After cooling down to room temperature, demolding is performed to produce a fused-cast basalt photovoltaic bracket product; The smelting is specifically performed at a rate of 20°C / min from room temperature to 1050°C, and then at a rate of 10°C / min from 1050°C to a smelting holding temperature of 1400-1500°C, with a smelting time of 60-150 minutes; the cooling rate is 0.5-0.8°C / min; The inorganic non-metallic fiber is one of basalt fiber, glass fiber and carbon fiber, or a mixture of several thereof; the auxiliary agent is one of kaolin, clay and waste glass.

Images