A method for manufacturing alkali-free glass fiber rope resistant to high temperature above 500°C

Abstract

A method for manufacturing an alkali-free glass fiber rope resistant to high temperatures above 500°C, which is made of alkali-free glass fibers. After acid leaching and thermal sintering, the high-temperature alkali-free glass fiber rope is white in color, uniform in thickness, soft in yarn, and has high tensile breaking strength. The silicon dioxide content is increased from 54% to more than 95%, thereby increasing the heat resistance of the alkali-free glass fiber rope. The alkali-free glass fiber rope obtained by the invention has a SiO2 content of ≥95%, a heat resistance of more than 900°C, and has the characteristics of low price and wide source of raw materials, and is widely used in the heat-resistant product industry and the fire-resistant weaving industry.

Description

Technical Field

[0001] The invention relates to the field of special new materials, in particular to a method for manufacturing a high-temperature resistant alkali-free glass fiber rope. Technical Background

[0002] At present, the widely used high-temperature resistant materials in the market are high-silicon and quartz products. These two types of products are excluded from the civilian market due to the scarcity of raw materials and high production costs. The domestic production capacity of alkali-free glass fiber has reached saturation, and the pool kiln production technology is mature, and the fiber quality and performance are stable. However, due to the performance limitations of the raw materials themselves, the long-term use temperature of alkali-free glass fiber is below 500℃, and the service life is short. Ordinary alkali-free glass fiber ropes cannot occupy a place in the field of high temperature resistance.

[0003] After searching for patents, there are currently no patents in China on improving the high temperature resistance of alkali-free glass fiber. Summary of the invention

[0004] In order to overcome the shortcoming that common alkali-free glass fiber ropes cannot withstand temperatures above 500° C. for a long time, the present invention provides a method for manufacturing alkali-free glass fiber ropes that can withstand high temperatures above 500° C.

[0005] The specific process of the present invention is:

[0006] Step 1, manufacturing alkali-free glass fiber rope blank rope:

[0007] The decomposed alkali-free glass fiber raw yarn is used to make a plurality of alkali-free glass fiber pagoda yarns without twist, and the plurality of alkali-free glass fiber pagoda yarns are twisted and stranded, and then wound on a plastic yarn tube to make an alkali-free glass fiber blank rope;

[0008] Step 2, manufacturing alkali-free glass fiber hanging rope:

[0009] The alkali-free glass fiber blank rope wound on the plastic yarn tube is swung on a fixed-length slinging machine to form an alkali-free glass fiber blank rope handle, and is tied and fixed with alkali-free glass fiber blank ropes of the same specification to obtain an alkali-free glass fiber slinging blank rope.

[0010] Step 3, acid leaching:

[0011] The alkali-free glass fiber hanging rope is evenly hung on the glass fiber reinforced plastic pipe, and is placed in an acid leaching tank so that the rope is immersed in hydrochloric acid aqueous solution for acid leaching.

[0012] During the acid leaching, the concentration of the hydrochloric acid aqueous solution is 4-6 mol / L, and the temperature of the hydrochloric acid aqueous solution is 90-98° C. In order to ensure the concentration and temperature of the hydrochloric acid aqueous solution, an acid-resistant circulation pump needs to be turned on to circulate the hydrochloric acid aqueous solution, and the hydrochloric acid aqueous solution needs to be heated with steam. The acid leaching time is 1-2 hours.

[0013] Step 4, Washing:

[0014] The acid-leached alkali-free glass fiber rope is suspended for 20 minutes to remove the hydrochloric acid solution on the rope surface, and then the rope is placed in a hot water washing tank for hot water washing. The water temperature of the hot water washing is 65-75°C and the hot water washing time is 1.5-2 hours.

[0015] The hanging billet rope after hot water washing is taken out from the hot water tank and put into the cold water tank, and the cold water tank water flows for cold water washing. The water temperature of the cold water washing is 25-35°C, and the cold water washing time is 1-2 hours.

[0016] After washing, the pH value of the surface of the alkali-free glass fiber hanging rope is tested; if the pH value obtained is 6-7, the washing is finished; if the pH value obtained is less than 6, the hot water washing and cold water washing processes are repeated until the pH value obtained is 6-7.

[0017] Step 5, drying:

[0018] The washed hanging rope is removed from the glass fiber reinforced plastic pipe and hung on a drying rack; the drying rack is placed in a microwave drying oven for drying. After drying, the raw materials are naturally cooled to room temperature.

[0019] The drying rack is suspended in two layers, upper and lower layers, each layer has 4 hanging rods, and each rod is hung with 10 washing and hanging ropes.

[0020] When drying, the drying temperature is 95-105°C. When the microwave oven temperature rises to 95-105°C, start timing; the drying time is 1 hour.

[0021] Step 6, heat treatment:

[0022] The cooled dried swing rope is hung on a heat treatment rack and placed in a sintering furnace for heat treatment for 1.5 hours to obtain an alkali-free glass fiber swing rope resistant to high temperatures above 500°C. The heat-treated high-temperature resistant alkali-free glass fiber swing rope is wound on an I-shaped wheel for standby use.

[0023] The heat treatment rack has 4 hanging rods in total, and 20 drying and hanging billet ropes are hung on each rod.

[0024] During the heat treatment, the temperature of the sintering furnace is raised to 550° C. and kept at this temperature for 40 minutes. After the heat preservation is completed, the temperature is continued to be raised to 675° C. and kept at this temperature. The billet rope is heat treated for 1.5 hours.

[0025] The SiO2 content of the alkali-free glass fiber rope obtained by the invention is ≥95%, and the temperature resistance reaches above 900°C.

[0026] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0027] The high temperature resistant alkali-free glass fiber rope produced by the process of the present invention is made of alkali-free glass fiber, which is low in price and easy to purchase. After acid leaching and thermal sintering, the high temperature resistant alkali-free glass fiber rope is white in color, uniform in thickness, soft in yarn, high in tensile breaking strength, and the silicon dioxide content is increased from 54% to more than 95%, which increases the temperature resistance of the alkali-free glass fiber rope. At present, the product is widely used in the heat-resistant product industry and the fire-resistant weaving industry.

[0028] The test results are shown in Table 1.

[0029]

[0030] Specific embodiments

[0031] Embodiment 1

[0032] This embodiment is a method for manufacturing a high temperature resistant alkali-free glass fiber rope.

[0033] Step 1: Manufacturing alkali-free glass fiber rope blank rope:

[0034] The EC9-66 alkali-free glass fiber raw yarn is decomposed to make EC9-66*16 twist-free alkali-free glass fiber pagoda yarn, and then 9 EC9-66*16 twist-free alkali-free glass fiber pagoda yarns are twisted and stranded, and then wound on a plastic yarn tube to make EC9-66*16*9S40 alkali-free glass fiber blank rope, the linear density of this blank rope is 9500Tex.

[0035] Step 2: Make alkali-free glass fiber hanging rope:

[0036] The alkali-free glass fiber blank rope wound on the plastic yarn tube is swung on a fixed-length slinging machine to form an alkali-free glass fiber blank rope handle with a total length of 100 meters and 10 turns, and is tied and fixed with alkali-free glass fiber blank ropes of the same specification to obtain an alkali-free glass fiber slinging blank rope.

[0037] Step 3, acid leaching:

[0038] The alkali-free glass fiber hanging rope is evenly hung on the FRP pipe and placed in the acid leaching tank. Each FRP pipe hangs 10 alkali-free glass fiber hanging ropes. There are 8 FRP pipes in the acid leaching tank, totaling 80 alkali-free glass fiber hanging ropes. The concentration of the hydrochloric acid aqueous solution in the acid leaching tank is 4 mol / L, and the temperature of the hydrochloric acid aqueous solution is controlled at 98°C. It is required to start acid leaching after the hydrochloric acid aqueous solution immerses the rope. In order to ensure the concentration and temperature of the hydrochloric acid aqueous solution, it is necessary to open the acid-resistant circulation pump to circulate the hydrochloric acid aqueous solution, and heat the hydrochloric acid aqueous solution with steam. The acid leaching time is 2 hours.

[0039] Step 4: Wash with water:

[0040] The acid-leached alkali-free glass fiber hanging rope is taken out from the acid leaching tank, and is suspended for 20 minutes. After the hydrochloric acid solution on the rope surface is removed, the rope is placed in a hot water washing tank for hot water washing. The water temperature of the hot water washing tank is controlled at 65°C, and the hot water needs to immerse the rope. The hot water washing time is 1.5 hours.

[0041] Take the hanging rope from the hot water tank after washing, and put it directly into the cold water tank. Open the cold water tank inlet valve and outlet valve to ensure the water flow in the cold water tank. The water temperature of the cold water tank is controlled at 25℃, and the cold water washing time is 2 hours. After washing, take the rope out of the cold water tank, and use the PH test paper to test the PH value of the surface of the alkali-free glass fiber hanging rope to be 6, and the washing is finished.

[0042] Step 5: Drying:

[0043] Remove the washed hanging billet rope from the FRP pipe and hang it on the drying rack. The drying rack is divided into two layers, with 4 hanging rods on each layer and 10 washed hanging billet ropes on each rod. Put the drying rack into the microwave drying oven for drying. The drying temperature is set to 95℃. After the microwave oven temperature rises to 95℃, start timing. The drying time is 1 hour.

[0044] Step 6: Heat treatment:

[0045] After the drying hanging billet rope is naturally cooled, it is placed in the sintering furnace for heat treatment. The cooled drying hanging billet rope is removed from the drying rack and hung on the heat treatment rack. The heat treatment rack has a total of 4 hanging rods, and 20 drying hanging billet ropes are hung on each rod. The heat treatment process is designed to be 550℃. After the drying hanging billet rope is placed, the timing starts after the sintering furnace temperature rises to 550℃. After 40 minutes of heat treatment, the temperature continues to rise. After the sintering furnace temperature rises to 675℃, the timing starts, and the heat treatment lasts for 1.5 hours. A high-temperature resistant alkali-free glass fiber hanging rope is obtained.

[0046] The high temperature resistant alkali-free glass fiber rope obtained after heat treatment is wound on an I-shaped wheel by a forming machine to obtain a high temperature resistant alkali-free glass fiber rope.

[0047] The performance test data of the high temperature resistant alkali-free glass fiber rope obtained in Example 1 are as follows

[0048] Test items Test value Tensile breaking strength 420N <![CDATA[SiO2 content]]> 97.98％ Temperature resistance 1000℃, no vitrification in 1 hour

[0049] Embodiment 2

[0050] Step 1: Manufacturing alkali-free glass fiber rope blank rope

[0051] The EC9-33 alkali-free glass fiber raw yarn is decomposed to make EC9-33*16 twist-free alkali-free glass fiber pagoda yarn, and then 9 EC9-33*16 twist-free alkali-free glass fiber pagoda yarns are twisted and stranded, and then wound on a plastic yarn tube to make EC9-33*16*9S40 alkali-free glass fiber blank rope, the linear density of this blank rope is 4752Tex.

[0052] Step 2: Make alkali-free glass fiber hanging rope

[0053] The alkali-free glass fiber blank rope wound on the plastic yarn tube is swung on a fixed-length slinging machine to form an alkali-free glass fiber blank rope handle with a total length of 100 meters and 10 turns, and is tied and fixed with alkali-free glass fiber blank ropes of the same specification to obtain an alkali-free glass fiber slinging blank rope.

[0054] Step 3: Acid Leaching

[0055] The alkali-free glass fiber hanging rope is evenly hung on the FRP pipe and placed in the acid leaching tank. Each FRP pipe hangs 10 alkali-free glass fiber hanging ropes. There are 8 FRP pipes in the acid leaching tank, with a total of 80 alkali-free glass fiber hanging ropes. The concentration of the hydrochloric acid aqueous solution in the acid leaching tank is 5.5 mol / L, and the temperature of the hydrochloric acid aqueous solution is controlled at 94°C. It is required to start acid leaching after the hydrochloric acid aqueous solution immerses the rope. In order to ensure the concentration and temperature of the hydrochloric acid aqueous solution, it is necessary to open the acid-resistant circulation pump to circulate the hydrochloric acid aqueous solution, and heat the hydrochloric acid aqueous solution with steam. The acid leaching time is 1.5 hours.

[0056] Step 4: Wash

[0057] The acid-leached alkali-free glass fiber hanging rope is taken out from the acid leaching tank, and is suspended for 20 minutes. After the hydrochloric acid solution on the rope surface is removed, the rope is placed in a hot water washing tank for hot water washing. The water temperature of the hot water washing tank is controlled at 70℃, and the hot water needs to immerse the rope. The hot water washing time is 2 hours.

[0058] Take the hanging rope out of the hot water tank and put it directly into the cold water tank. Open the cold water tank inlet and outlet valves to ensure the water flow. The water temperature of the cold water tank is controlled at 30℃ and the cold water washing time is 1.5 hours. After washing, take the rope out of the cold water tank and use the PH test paper to test the PH value of the surface of the alkali-free glass fiber hanging rope. It is 6, and the washing is finished.

[0059] Step 5: Drying

[0060] Remove the washed hanging billet rope from the FRP pipe and hang it on the drying rack. The drying rack is divided into two layers, with 4 hanging rods on each layer and 10 washed hanging billet ropes on each rod. Put the drying rack into a microwave drying oven for drying. The drying temperature is set to 100°C. After the microwave oven temperature rises to 100°C, start timing. The drying time is 1 hour.

[0061] Step 6: Heat treatment

[0062] After the drying hanging billet rope is naturally cooled, it is placed in the sintering furnace for heat treatment. The cooled drying hanging billet rope is removed from the drying rack and hung on the heat treatment rack. The heat treatment rack has a total of 4 hanging rods, and 20 drying hanging billet ropes are hung on each rod. The heat treatment process is designed to be 580℃. After the drying hanging billet rope is placed, the timing starts after the sintering furnace temperature rises to 580℃. After 35 minutes of heat treatment, the temperature continues to rise. After the sintering furnace temperature rises to 650℃, the timing starts and the heat treatment lasts for 2 hours. A high-temperature resistant alkali-free glass fiber hanging rope is obtained.

[0063] The high temperature resistant alkali-free glass fiber rope obtained after heat treatment is wound on an I-shaped wheel by a forming machine to obtain a high temperature resistant alkali-free glass fiber rope.

[0064] Example 2 High temperature resistant alkali-free glass fiber rope test data are as follows

[0065] Test items Test value Tensile breaking strength 200N <![CDATA[SiO2 content]]> 98.12％ Temperature resistance 1000℃, no vitrification in 1 hour

[0066] Embodiment 3

[0067] Step 1: Manufacturing alkali-free glass fiber rope blank rope

[0068] The EC9-66 alkali-free glass fiber raw yarn is decomposed to make EC9-66*8*9 untwisted alkali-free glass fiber pagoda yarn, and then 9 EC9-66*8 untwisted alkali-free glass fiber pagoda yarns are twisted and stranded, and then wound on a plastic yarn tube to make EC9-66*8*9S40 alkali-free glass fiber blank rope, the linear density of this blank rope is 4755Tex.

[0069] Step 2: Make alkali-free glass fiber hanging rope

[0070] The alkali-free glass fiber blank rope wound on the plastic yarn tube is swung on a fixed-length slinging machine to form an alkali-free glass fiber blank rope handle with a total length of 100 meters and 10 turns, and is tied and fixed with alkali-free glass fiber blank ropes of the same specification to obtain an alkali-free glass fiber slinging blank rope.

[0071] Step 3: Acid Leaching

[0072] The alkali-free glass fiber hanging rope is evenly hung on the FRP pipe and placed in the acid leaching tank. Each FRP pipe hangs 10 alkali-free glass fiber hanging ropes. There are 8 FRP pipes in the acid leaching tank, totaling 80 alkali-free glass fiber hanging ropes. The concentration of the hydrochloric acid aqueous solution in the acid leaching tank is 6 mol / L, and the temperature of the hydrochloric acid aqueous solution is controlled at 90°C. It is required to start acid leaching after the hydrochloric acid aqueous solution immerses the rope. In order to ensure the concentration and temperature of the hydrochloric acid aqueous solution, it is necessary to open the acid-resistant circulation pump to circulate the hydrochloric acid aqueous solution, and heat the hydrochloric acid aqueous solution with steam. The acid leaching time is 1 hour.

[0073] Step 4: Wash

[0074] The acid-leached alkali-free glass fiber hanging rope is taken out from the acid leaching tank, suspended for 20 minutes, and the hydrochloric acid solution on the rope surface is removed, and then the rope is put into the hot water washing tank for hot water washing. The water temperature of the hot water washing tank is controlled at 75℃, and the hot water needs to immerse the rope, and the hot water washing time is 2 hours.

[0075] Take the hanging rope from the hot water tank after washing, and put it directly into the cold water tank. Open the cold water tank inlet valve and outlet valve to ensure the water flow in the cold water tank. The water temperature of the cold water tank is controlled at 35℃, and the cold water washing time is 1 hour. After washing, take the rope out of the cold water tank, and use the PH test paper to test the PH value of the surface of the alkali-free glass fiber hanging rope to 7, and the washing is finished.

[0076] Step 5: Drying

[0077] Remove the washed hanging billet rope from the FRP pipe and hang it on the drying rack. The drying rack is divided into two layers, with 4 hanging rods on each layer and 10 washed hanging billet ropes on each rod. Put the drying rack into the microwave drying oven for drying. The drying temperature is set to 105℃. After the microwave oven temperature rises to 105℃, start timing. The drying time is 1 hour.

[0078] Step 6: Heat treatment

[0079] After the drying hanging billet rope is naturally cooled, it is placed in the sintering furnace for heat treatment. The cooled drying hanging billet rope is removed from the drying rack and hung on the heat treatment rack. The heat treatment rack has 4 hanging rods, and 20 drying hanging billet ropes are hung on each rod. The heat treatment process is designed to be 600℃. After the drying hanging billet rope is placed, the timing starts after the sintering furnace temperature rises to 600℃. After 35 minutes of heat treatment, the temperature continues to rise. After the sintering furnace temperature rises to 700℃, the timing starts and the heat treatment lasts for 1 hour. A high-temperature resistant alkali-free glass fiber hanging rope is obtained.

[0080] The high temperature resistant alkali-free glass fiber rope obtained after heat treatment is wound on an I-shaped wheel by a forming machine to obtain a high temperature resistant alkali-free glass fiber rope.

[0081] Example 3 The test data of high temperature resistant alkali-free glass fiber rope are as follows:

[0082] Test items Test value Tensile breaking strength 210N <![CDATA[SiO2 content]]> 98.05％ Temperature resistance 1000℃, no vitrification in 1 hour

Claims

1. A method for manufacturing an alkali-free glass fiber rope resistant to high temperatures above 500°C, characterized in that: The specific process is: Step 1, manufacturing alkali-free glass fiber rope blank rope: The decomposed alkali-free glass fiber raw yarn is used to make a plurality of alkali-free glass fiber pagoda yarns without twist, and the plurality of alkali-free glass fiber pagoda yarns are twisted and stranded, and then wound on a plastic yarn tube to make an alkali-free glass fiber blank rope; The linear density of the blank rope is 9500-9510Tex; Step 2, manufacturing alkali-free glass fiber hanging rope: The alkali-free glass fiber blank rope wound on the plastic yarn tube is swung on a fixed-length slinging machine to form an alkali-free glass fiber blank rope handle, and is tied and fixed with alkali-free glass fiber blank ropes of the same specification to obtain an alkali-free glass fiber slinging blank rope; Step 3, acid leaching: The alkali-free glass fiber hanging rope is evenly hung on the glass fiber reinforced plastic pipe, and is placed in an acid leaching tank so that the rope is immersed in a hydrochloric acid aqueous solution to carry out acid leaching; During the acid leaching, the concentration of the hydrochloric acid aqueous solution is 4 to 6 mol / L, and the temperature of the hydrochloric acid aqueous solution is 90 to 98° C. In order to ensure the concentration and temperature of the hydrochloric acid aqueous solution, an acid-resistant circulation pump is turned on to circulate the hydrochloric acid aqueous solution, and the hydrochloric acid aqueous solution is heated with steam; the acid leaching time is 1 to 2 hours; Step 4, washing: The acid-leached alkali-free glass fiber rope is suspended for 20 minutes to remove the hydrochloric acid solution on the surface of the rope, and then the rope is placed in a hot water washing tank for hot water washing; the water temperature of the hot water washing is 65-75°C, and the hot water washing time is 1.5-2 hours; The hanging billet rope after hot water washing is taken out from the hot water tank and placed in a cold water tank, and the cold water tank water is allowed to flow for cold water washing; the water temperature of the cold water washing is 25-35°C, and the cold water washing time is 1-2 hours; After washing, the pH value of the surface of the alkali-free glass fiber hanging rope is tested; if the pH value obtained is 6 to 7, the washing is finished; if the pH value obtained is less than 6, the hot water washing and cold water washing processes are repeated until the pH value obtained is 6 to 7; Step 5, drying: The washed hanging rope is removed from the glass fiber reinforced plastic pipe and hung on a drying rack; the drying rack is placed in a microwave drying oven for drying; after drying, the drying rack is naturally cooled to room temperature; Step 6, heat treatment: The cooled dried hanging billet rope is hung on a heat treatment rack and placed in a sintering furnace for heat treatment for 1.5 hours to obtain an alkali-free glass fiber rope resistant to high temperatures above 500°C; During the heat treatment, the temperature of the sintering furnace is raised to 550°C and kept at this temperature for 40 minutes; after the heat preservation is completed, the temperature is continued to be raised to 675°C and kept at this temperature, and the billet rope is heat treated for 1.5 hours; Wind the heat-treated high-temperature resistant alkali-free glass fiber rope onto the I-spool and set aside.

2. The method for manufacturing the alkali-free glass fiber rope resistant to high temperature of 500°C or above as claimed in claim 1, characterized in that: The linear density of the blank rope is 9500-9510Tex.

3. The method for manufacturing the alkali-free glass fiber rope resistant to high temperature of 500°C or above as claimed in claim 1, characterized in that: The drying rack is suspended in two layers, upper and lower layers, each layer has 4 hanging rods, and each rod is hung with 10 washing and hanging ropes.

4. The method for manufacturing the alkali-free glass fiber rope resistant to high temperature of 500°C or above as claimed in claim 1, characterized in that: During the drying in step 5, the drying temperature is 95-105° C., and the timing starts after the microwave oven temperature rises to 95-105° C.; The drying time is 1 hour.

5. The method for manufacturing the alkali-free glass fiber rope resistant to high temperature of 500°C or above as claimed in claim 1, characterized in that: The processing rack has 4 hanging rods in total, and each rod hangs 20 drying and hanging ropes.

6. The method for manufacturing the alkali-free glass fiber rope resistant to high temperature of 500°C or above as claimed in claim 1, characterized in that: The tensile breaking strength of the alkali-free glass fiber rope capable of withstanding high temperatures above 500° C. is 200-420N, and the SiO2 content is 98.05-97.98%.

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