CN110862234A - Recovery method of glass fiber waste silk - Google Patents
Recovery method of glass fiber waste silk Download PDFInfo
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- CN110862234A CN110862234A CN201911293179.3A CN201911293179A CN110862234A CN 110862234 A CN110862234 A CN 110862234A CN 201911293179 A CN201911293179 A CN 201911293179A CN 110862234 A CN110862234 A CN 110862234A
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C12/00—Powdered glass; Bead compositions
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
- C03C1/002—Use of waste materials, e.g. slags
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Abstract
The invention relates to the technical field of fiber production, in particular to a method for recovering waste glass fiber. The recovery method of the glass fiber waste silk comprises the following steps: A) washing the glass fiber waste silk with high pressure water, wherein the water pressure of the high pressure water washing is 0.2-0.4 MPa; B) carrying out wet grinding on the high-pressure water washed glass fiber waste silk to obtain glass powder; C) drying the glass powder to obtain dried glass powder; D) stirring and mixing the dried glass powder and the organic solvent at 80-100 ℃ and 0.1-0.3 MPa; E) and drying the stirred and mixed glass powder to obtain the treated glass powder. The glass powder obtained by the recovery method of the waste glass fiber has excellent performance, the COD value of the glass powder is low, the content of the ferrous iron in the glass components is almost unchanged, the oxidation reduction of the tank furnace is well controlled, and the operation rate is at a high level.
Description
Technical Field
The invention relates to the technical field of fiber production, in particular to a method for recovering waste glass fiber.
Background
The glass fiber is an inorganic non-metallic material with excellent performance, and has a wide variety of types, strong heat resistance, good corrosion resistance and high mechanical strength. The wire is made from various mineral raw materials such as pyrophyllite, quartz sand, limestone, dolomite, borocalcite, boromagnesite, fluorite, sepiolite, kaoline spodumene and the like through the processes of high-temperature melting, wire drawing/impregnating compound coating, drying, degradation and the like, and the diameter of a monofilament is between several microns and twenty-several microns according to different products. Glass fibers are commonly used as reinforcing materials in composite materials, electrical and thermal insulation materials, circuit substrates, and other various fields of the national economy.
In the production and manufacturing process of glass fiber, a lot of waste glass fiber yarns are generated in the processes of drawing, annealing and the like, cannot be decomposed through biodegradation and combustion, can only be treated through a conventional landfill mode, and has high recovery cost. In order to save cost, the conventional solution is to process the waste glass fiber into glass powder in a certain way, and the glass powder is reused as a raw material and added into a tank furnace for blending.
In the methods for recycling waste glass fiber proposed in patent CN 106583420 a and patent CN 108975680 a, the organic impregnating compound coated on the waste glass fiber cannot be removed, and the treated organic impregnating compound is added into a tank furnace as a raw material, although the production cost can be reduced, because of the type and content of different impregnating compounds on the waste glass fiber, the content of COD (chemical oxygen demand) in the waste glass powder (formed by grinding waste glass fiber) is high, the stability is very poor, the control of S/C ratio in the whole formula is affected, and the adjustment of redox atmosphere in the tank furnace is not facilitated, the fluctuation of ferrous iron in the glass liquid is large, the thermal conductivity of the glass liquid is unstable, and the wire drawing operation is deteriorated, and the full cylinder rate of wire drawing is affected.
Disclosure of Invention
In view of the above, the technical problem to be solved by the present invention is to provide a method for recovering waste glass fiber, in which the glass powder obtained by the method for recovering waste glass fiber has excellent performance, the COD value of the glass powder is low, the content of ferrous iron in the glass component is almost unchanged, the redox of the tank furnace is well controlled, and the operation rate is at a high level.
The invention provides a method for recovering waste glass fiber, which comprises the following steps:
A) washing the glass fiber waste silk with high pressure water, wherein the water pressure of the high pressure water washing is 0.2-0.4 MPa;
B) carrying out wet grinding on the high-pressure water washed glass fiber waste silk to obtain glass powder;
C) drying the glass powder to obtain dried glass powder;
D) stirring and mixing the dried glass powder and the organic solvent at 80-100 ℃ and 0.1-0.3 MPa;
E) and drying the stirred and mixed glass powder to obtain the treated glass powder.
Preferably, the time of the high-pressure water washing is 5-10 min.
Preferably, in the step B), the particle size of the glass powder is less than or equal to 60 meshes, and the residual content of 200-mesh sieve is less than or equal to 0.8 wt%.
Preferably, step C) further comprises, before the drying: carrying out centrifugal dehydration on the glass powder;
the water content of the glass powder after centrifugal dehydration is 5-10%.
Preferably, in the step C), the drying temperature is 150-200 ℃, and the drying time is 30-45 min.
Preferably, in the step C), the water content of the dried glass powder is 0-3%.
Preferably, in step D), the organic solvent includes one or more of methanol, ethanol, ethyl acetate, butyl acetate, isopropanol and acetone.
Preferably, in the step D), the mass ratio of the dried glass powder to the organic solvent is 1: 10 to 20.
Preferably, in the step D), the stirring and mixing time is 30-60 min.
Preferably, in the step E), the drying temperature is 80-90 ℃, and the drying time is 15-35 min.
The invention provides a method for recovering waste glass fiber, which comprises the following steps: A) washing the glass fiber waste silk with high pressure water, wherein the water pressure of the high pressure water washing is 0.2-0.4 MPa; B) carrying out wet grinding on the high-pressure water washed glass fiber waste silk to obtain glass powder; C) drying the glass powder to obtain dried glass powder; D) stirring and mixing the dried glass powder and the organic solvent at 80-100 ℃ and 0.1-0.3 MPa; E) and drying the stirred and mixed glass powder to obtain the treated glass powder. The glass powder obtained by the recovery method of the waste glass fiber has excellent performance, the COD value of the glass powder is low, the content of the ferrous iron in the glass components is almost unchanged, the oxidation reduction of the tank furnace is well controlled, and the operation rate is at a high level.
Experimental results show that the glass fiber yarn powder obtained by the recovery method provided by the invention has excellent performance, the chemical oxygen demand COD of the glass fiber yarn powder is less than 70ppm, and the glass fiber yarn powder is basically equal to high-calcination-degree calcination-type mineral raw materials, such as light calcined powder and calcined dolomite; the raw materials are added into a tank furnace, the ferrous content in the glass components is basically unchanged, and the oxidation reduction of the tank furnace is well controlled; the operation running rate is higher than 96%, and the operation running rate is at a higher level.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a method for recovering waste glass fiber, which comprises the following steps:
A) washing the glass fiber waste silk with high pressure water, wherein the water pressure of the high pressure water washing is 0.2-0.4 MPa;
B) carrying out wet grinding on the high-pressure water washed glass fiber waste silk to obtain glass powder;
C) drying the glass powder to obtain dried glass powder;
D) stirring and mixing the dried glass powder and the organic solvent at 80-100 ℃ and 0.1-0.3 MPa;
E) and drying the stirred and mixed glass powder to obtain the treated glass powder.
In the recovery method provided by the invention, the glass fiber waste silk is washed by high-pressure water. The source of the waste glass fiber is not particularly limited, and in some embodiments, the waste glass fiber is selected from waste glass fiber generated during a drawing operation or a degradation process.
In the invention, the water pressure of the high-pressure water washing is 0.2-0.4 MPa. In certain embodiments of the invention, the water pressure of the high pressure water wash is 0.3MPa, 0.2MPa, or 0.4 MPa. In some embodiments of the present invention, the high-pressure water washing time is 5-10 min. In certain embodiments, the time for the high pressure water wash is 8min, 6min, or 10 min. In certain embodiments of the invention, the high pressure water wash is performed by repeatedly tumbling the fiberglass waste. The high-pressure water washing can remove conventional inorganic impurities, metal impurities and stains on the waste glass fibers.
And after the high-pressure water washing is finished, carrying out wet grinding on the glass fiber waste silk subjected to the high-pressure water washing to obtain glass powder.
In the embodiment of the invention, after the high-pressure water washing is finished, the wet grinding is directly carried out without any treatment.
In certain embodiments of the present invention, the wet milling is selected from one or more of ball milling, vertical milling, and laser milling. In certain embodiments of the present invention, the glass frit has a particle size of 60 mesh or less and a 200 mesh residue of 0.8 wt% or less.
And after the glass powder is obtained, drying the glass powder to obtain the dried glass powder.
In certain embodiments of the present invention, the glass frit further comprises, before drying: and carrying out centrifugal dehydration on the glass powder. In certain embodiments of the present invention, the water content of the centrifugally dewatered glass frits is 5% to 10%. In certain embodiments, the water content of the centrifugally dewatered glass frits is 8%.
In certain embodiments of the present invention, the method for drying the glass frit is selected from one or more of hot air circulation drying, microwave drying and infrared drying. In some embodiments of the invention, the drying temperature of the glass powder is 150-200 ℃, and the drying time is 30-45 min. In certain embodiments, the glass frit is dried at a temperature of 180 ℃, 160 ℃, or 200 ℃ for a time of 40min, 30min, or 45 min. In some embodiments of the present invention, the water content of the dried glass frit is 0 to 3%. In certain embodiments, the water content of the dried glass frit is 1.7%, 2.3%, or 1.8%.
And after obtaining the dried glass powder, stirring and mixing the dried glass powder and the organic solvent at 80-100 ℃ and 0.1-0.3 MPa.
In certain embodiments of the present invention, the organic solvent comprises one or more of methanol, ethanol, ethyl acetate, butyl acetate, isopropanol, and acetone.
In certain embodiments of the present invention, the mass ratio of the dried glass frit to the organic solvent is 1: 10 to 20. In certain embodiments, the mass ratio of the dried glass frit to the organic solvent is 1: 15. 1: 10 or 1: 20.
in certain embodiments of the invention, the temperature of the agitation mixing is 90 ℃, 80 ℃, or 95 ℃. In certain embodiments of the invention, the pressure of the agitation mixing is 0.2MPa, 0.1MPa, or 0.3 MPa. In some embodiments of the present invention, the rotation speed of the stirring and mixing is 100 to 150 rpm. In certain embodiments of the invention, the rotational speed of the agitation mixing is 125rpm, 100rpm, or 150 rpm. In some embodiments of the present invention, the time for stirring and mixing is 30-60 min. In certain embodiments, the time of the stirring and mixing is 45min, 30min, or 60 min. In certain embodiments of the invention, the agitated mixing is performed in an organic reaction vessel. The dried glass powder and the organic solvent are stirred and mixed, so that the impregnating compound on the glass powder is dissolved in an organic solvent system, and the organic desorption of the glass powder is realized.
And after the stirring and mixing are finished, drying the glass powder after stirring and mixing to obtain the glass powder after treatment.
In certain embodiments of the present invention, the drying is selected from one of heated air circulation drying, microwave drying, and infrared drying. In some embodiments of the invention, the drying temperature is 80-90 ℃, and the drying time is 15-35 min. In certain embodiments, the temperature of the drying is 85 ℃, 80 ℃ or 90 ℃, and the time of the drying is 25min, 15min or 35 min.
The source of the above-mentioned raw materials is not particularly limited in the present invention, and may be generally commercially available.
In the examples of the present invention, the chemical oxygen demand COD test (evaluation of reducing substance content) of the treated glass frits was as follows:
under the strong acid condition, reducing substances (organic and inorganic) in the glass powder react with a certain amount of potassium dichromate standard solution, the reaction is carried out by heating, boiling and refluxing, excessive potassium dichromate takes resorufin as an indicator, ammonium ferrous sulfate standard solution is used for back dripping, and the amount of the reducing substances in the sample is calculated according to the consumption of the ammonium ferrous sulfate. Specifically, the method comprises the following steps:
accurately weighing 2.000g of sample in a 500mL triangular flask, and adding 0.100g of HgSO4Plus 40mLH2SO4The solution (sulfuric acid mixed with equal volume of deionized water) was accurately pipetted 10mLK2Cr2O7Adding 30ml of LAg into the standard solution2SO4-H2SO4Shaking, installing a condenser tube, boiling on an electric furnace, keeping slightly boiling for 2h, washing the inner wall and the plug of the tube with distilled water after cooling, cooling to room temperature, adding water to make the volume of the tube 200-250 mL, adding 4 drops of ferron indicator, and using (NH)4)2Fe(SO4)2The standard solution was titrated from yellow through blue-green to reddish-brown to the end point.
The chemical oxygen demand COD of the sample is represented by C and calculated according to the formula (1):
C＝750.8(10-aV)/m (1)；
in formula (1):
c-chemical oxygen demand, mg/kg (ppm);
a-10/titration of blank consumption (NH)4)2Fe(SO4)2Amount of (mL);
v is the volume (mL) of the ammonium ferrous sulfate standard titration solution consumed in the sample measurement;
m-mass (g) of the sample.
Note 1: potassium dichromate standard solution K2Cr2O70.2500mol/L；
Note 2: (NH)4)2Fe(SO4)20.2mol/L。
In the examples of the invention, the ferrous oxide test in glass (evaluation of the redox atmosphere of the tank furnace) is as follows:
titrating by using a potassium dichromate standard solution, wherein the reaction formula is as follows:
6Fe2++Cr2O7 2-+14H+＝6Fe3++2Cr3++7H2O
grinding a glass sample to about 200 meshes by using an agate mortar; 0.3000 +/-0.0030 g of glass powder sample is weighed, and 15mL of H is added2SO4Adding 10mL of concentrated hydrofluoric acid into the solution (sulfuric acid is mixed with deionized water with the same volume), uniformly stirring, standing for 10min, adding 2 drops of 0.1% sodium diphenylaminesulfonate indicator, titrating by using 0.005mol/L potassium dichromate solution, and obtaining the end point when the solution is changed from colorless to mauve. The FeO content is calculated according to the formula (2).
FeO％＝MV×0.07185×100/G (2)；
In formula (2):
m is the concentration (mol/L) of the potassium dichromate standard solution;
v-volume of potassium dichromate solution consumed for titration (mL);
g, weighing the mass (G) of the glass powder to be measured.
The invention provides a method for recovering waste glass fiber, which comprises the following steps: A) washing the glass fiber waste silk with high pressure water, wherein the water pressure of the high pressure water washing is 0.2-0.4 MPa; B) carrying out wet grinding on the high-pressure water washed glass fiber waste silk to obtain glass powder; C) drying the glass powder to obtain dried glass powder; D) stirring and mixing the dried glass powder and the organic solvent at 80-100 ℃ and 0.1-0.3 MPa; E) and drying the stirred and mixed glass powder to obtain the treated glass powder. The glass powder obtained by the recovery method of the waste glass fiber has excellent performance, the COD value of the glass powder is lower, the content of the ferrous iron in the glass components is almost unchanged, the oxidation reduction of the tank furnace is well controlled, and the operation rate is at a higher level
When the glass powder treated by the method is used as a raw material, the S/C ratio of the whole raw material is not influenced, the balance of the redox atmosphere of the tank furnace can be well maintained, and the stability of wire drawing operation is ensured.
The glass fiber yarn contains less organic impregnating compound, so that the organic solvent for treating the glass fiber yarn at high temperature and high pressure can be repeatedly used, and the treatment cost is greatly saved.
In addition, the treatment mode of high temperature and high pressure ensures that the organic impregnating compound in the glass fiber yarn powder can be dissolved in an organic solvent system in a very short time, thereby greatly improving the treatment efficiency of the glass powder.
Experimental results show that the glass fiber yarn powder obtained by the recovery method provided by the invention has excellent performance, the chemical oxygen demand COD of the glass fiber yarn powder is less than 70ppm, and the glass fiber yarn powder is basically equal to high-calcination-degree calcination-type mineral raw materials, such as light calcined powder and calcined dolomite; the raw materials are added into a tank furnace, the ferrous content in the glass components is basically unchanged, and the oxidation reduction of the tank furnace is well controlled; the operation running rate is higher than 96%, and the operation running rate is at a higher level.
In order to further illustrate the present invention, the following will describe the method for recycling waste glass fiber in detail with reference to the following examples, which should not be construed as limiting the scope of the present invention.
The starting materials used in the following examples are all generally commercially available.
Example 1
Selecting waste glass fiber yarns in a wire drawing operation workshop and a wire drawing and unwinding workshop.
Firstly, washing repeatedly with high-pressure water of 0.3Mpa for 8min, and repeatedly turning over the glass fiber yarns in the washing process.
And (3) wet-screening the washed glass filaments into glass powder directly in a ball milling mode, and grinding until the glass powder is completely passed through a screen of 60 meshes, wherein the residual content of the screened glass powder of 200 meshes is less than or equal to 0.8%.
And (3) centrifugally dewatering the product after being ground to be qualified, wherein the water content of the glass powder after centrifugal dewatering is 8%, and then drying the product for 40min at 180 ℃ in a hot air circulation and infrared drying mode in the second step, wherein the water content of the glass powder is 1.7%.
Placing the dried glass powder into an organic reaction kettle added with a mixed organic solvent of isopropanol, ethyl acetate and methanol, and stirring and mixing at 90 ℃ and 0.2Mpa for 45min at 125 rpm. The mass ratio of the dried glass powder to the organic solvent is 1: 15.
and drying the stirred and mixed glass powder for 25min by using a hot air circulation oven at 85 ℃.
After treatment, the glass powder is a clean inorganic non-metallic material, does not contain an organic impregnating compound, has good granularity quality control, can be directly used as a raw material to be added into a tank furnace according to a ratio, and greatly saves the production cost.
Example 2
Selecting waste glass fiber yarns in a wire drawing operation workshop and a wire drawing and unwinding workshop.
Firstly, washing repeatedly with high-pressure water of 0.2Mpa for 6min, and repeatedly turning over the glass fiber yarns in the washing process.
And (3) wet-screening the washed glass filaments into glass powder directly in a ball milling mode, and grinding until the glass powder is completely passed through a screen of 60 meshes, wherein the residual content of the screened glass powder of 200 meshes is less than or equal to 0.8%.
And (3) centrifugally dewatering the product after being ground to be qualified, wherein the water content of the glass powder after centrifugal dewatering is 8%, and then drying the product for 30min at 160 ℃ in a hot air circulation and infrared drying mode, wherein the water content of the glass powder is 2.3%.
Placing the dried glass powder into an organic reaction kettle added with a mixed organic solvent of isopropanol, ethyl acetate and methanol, and stirring and mixing at 100rpm for 30min at 80 ℃ and 0.1 Mpa. The mass ratio of the dried glass powder to the organic solvent is 1: 10.
and drying the stirred and mixed glass powder for 15min by using a hot air circulation oven at the temperature of 80 ℃.
After treatment, the glass powder is a clean inorganic non-metallic material, does not contain an organic impregnating compound, has good granularity quality control, can be directly used as a raw material to be added into a tank furnace according to a ratio, and greatly saves the production cost.
Example 3
Selecting waste glass fiber yarns in a wire drawing operation workshop and a wire drawing and unwinding workshop.
Firstly, washing repeatedly with high-pressure water of 0.4Mpa for 10min, and repeatedly turning over the glass fiber yarns in the washing process.
And (3) wet-screening the washed glass filaments into glass powder directly in a ball milling mode, and grinding until the glass powder is completely passed through a screen of 60 meshes, wherein the residual content of the screened glass powder of 200 meshes is less than or equal to 0.8%.
And (3) centrifugally dewatering the product after being ground to be qualified, wherein the water content of the glass powder after centrifugal dewatering is 8%, and then drying the product for 45min at 200 ℃ in a hot air circulation and infrared drying mode, wherein the water content of the glass powder is 1.8%.
Placing the dried glass powder into an organic reaction kettle added with a mixed organic solvent of isopropanol, ethyl acetate and methanol, and stirring and mixing at 95 ℃ and 0.3Mpa for 60min at 150 rpm. The mass ratio of the dried glass powder to the organic solvent is 1: 20.
and drying the stirred and mixed glass powder for 35min by a hot air circulation oven at 90 ℃.
After treatment, the glass powder is a clean inorganic non-metallic material, does not contain an organic impregnating compound, has good granularity quality control, can be directly used as a raw material to be added into a tank furnace according to a ratio, and greatly saves the production cost.
Comparative example 1
Selecting waste glass fiber yarns in a wire drawing operation workshop and a wire drawing and unwinding workshop.
Firstly, washing repeatedly with high-pressure water of 0.3Mpa for 8min, and repeatedly turning over the glass fiber yarns in the washing process.
And (3) wet-screening the washed glass filaments into glass powder directly in a ball milling mode, and grinding until the glass powder is completely passed through a screen of 60 meshes, wherein the residual content of the screened glass powder of 200 meshes is less than or equal to 0.8%.
And (3) centrifugally dewatering the product after being ground to be qualified, wherein the water content of the glass powder after centrifugal dewatering is 8%, and then drying the product for 40min at 180 ℃ in a hot air circulation and infrared drying mode in the second step, wherein the water content of the glass powder is 1.6%.
And directly adding the dried glass powder serving as a raw material into a tank furnace.
Comparative example 2
Selecting waste glass fiber yarns in a wire drawing operation workshop and a wire drawing and unwinding workshop.
Firstly, washing repeatedly with high-pressure water of 0.3Mpa for 8min, and repeatedly turning over the glass fiber yarns in the washing process.
And (3) centrifugally dewatering the glass fiber yarns subjected to high-pressure washing, wherein the water content of the glass fiber yarns after centrifugal dewatering is 9.3%, and then drying the glass fiber yarns at 180 ℃ for 40min in a hot air circulation and infrared drying mode, wherein the water content of the glass powder is 2.5%.
Placing the dried glass fiber yarn into an organic reaction kettle added with mixed organic solvent of isopropanol, ethyl acetate and methanol, and stirring and mixing at 90 deg.C and 0.2Mpa at 125rpm for 45 min. The mass ratio of the dried glass fiber yarns to the organic solvent is 1: 15.
drying the glass fiber yarns subjected to organic treatment for 25min by using a hot air circulation oven at 85 ℃.
The glass fiber yarns after finishing treatment are directly used as raw materials and added into a tank furnace.
Comparative example 3
Selecting waste glass fiber yarns in a wire drawing operation workshop and a wire drawing and unwinding workshop.
Wet sieving the waste glass filaments into glass powder directly in a ball milling mode, and grinding until the glass powder is completely passed through a sieve of 60 meshes, wherein the residual content of the 200-mesh sieve is less than or equal to 0.8 percent.
And (3) centrifugally dewatering the product after being ground to be qualified, wherein the water content of the glass powder after centrifugal dewatering is 8%, and then drying the product for 40min at 180 ℃ in a hot air circulation and infrared drying mode in the second step, wherein the water content of the glass powder is 2.1%.
The dried glass powder is put into a reaction kettle added with the mixed organic solvent of isopropanol, ethyl acetate and methanol, and is stirred and mixed for 45min at the temperature of 90 ℃ and the pressure of 0.2Mpa and at the rpm of 125 rpm. The mass ratio of the dried glass powder to the organic solvent is 1: 15.
drying the glass powder subjected to organic treatment for 25min by using a hot air circulation oven at 85 ℃.
And directly adding the dried glass powder serving as a raw material into a tank furnace.
Example 4
The performance of the glass powder or glass fiber yarn prepared in examples 1 to 3 and comparative examples 1 to 3 was measured according to the above-mentioned test method, and the results are shown in table 1.
TABLE 1 Performance test results of glass powder or glass fiber yarn prepared in examples 1 to 3 and comparative examples 1 to 3
As can be seen from Table 1, the fiberglass yarn powder obtained by the recovery method provided by the invention has excellent performance, the chemical oxygen demand COD is less than 70ppm, and the performance is basically equal to that of high-calcination-degree calcined mineral raw materials, such as light calcined powder and calcined dolomite; the raw materials are added into a tank furnace, the ferrous content in the glass components is basically unchanged, and the oxidation reduction of the tank furnace is well controlled; the operation running rate is higher than 96%, and the operation running rate is at a higher level.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for recovering glass fiber waste silk comprises the following steps:
A) washing the glass fiber waste silk with high pressure water, wherein the water pressure of the high pressure water washing is 0.2-0.4 MPa;
B) carrying out wet grinding on the high-pressure water washed glass fiber waste silk to obtain glass powder;
C) drying the glass powder to obtain dried glass powder;
D) stirring and mixing the dried glass powder and the organic solvent at 80-100 ℃ and 0.1-0.3 MPa;
E) and drying the stirred and mixed glass powder to obtain the treated glass powder.
2. The recycling method according to claim 1, wherein the time of the high pressure water washing is 5 to 10 min.
3. The recovery method according to claim 1, wherein in step B), the particle size of the glass frit is not more than 60 mesh, and the residual content of 200 mesh is not more than 0.8 wt%.
4. The recycling method according to claim 1, wherein the step C), before the drying, further comprises: carrying out centrifugal dehydration on the glass powder;
the water content of the glass powder after centrifugal dehydration is 5-10%.
5. The recycling method according to claim 1, wherein in the step C), the drying temperature is 150 to 200 ℃, and the drying time is 30 to 45 min.
6. The recycling method according to claim 1, wherein in the step C), the water content of the dried glass frit is 0 to 3%.
7. The recycling method according to claim 1, wherein in the step D), the organic solvent comprises one or more of methanol, ethanol, ethyl acetate, butyl acetate, isopropanol and acetone.
8. The recycling method according to claim 1, wherein in the step D), the mass ratio of the dried glass frit to the organic solvent is 1: 10 to 20.
9. The recycling method according to claim 1, wherein in the step D), the stirring and mixing time is 30-60 min.
10. The recycling method according to claim 1, wherein in the step E), the drying temperature is 80-90 ℃, and the drying time is 15-35 min.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114453388A (en) * | 2022-01-27 | 2022-05-10 | 四川浩方汇通复合材料有限公司 | Glass fiber solid waste silk re-modification utilization treatment production line and treatment process |
| EP4374967A1 (en) * | 2022-11-28 | 2024-05-29 | Dfm Ip B.V. | Method for recovering mineral substrates from valuable materials containing artificial mineral fibres |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110156336A (en) * | 2019-07-02 | 2019-08-23 | 山东聚源玄武岩纤维股份有限公司 | A kind of basalt fibre waste silk melts down reuse method |
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| CN107082582A (en) * | 2016-02-15 | 2017-08-22 | 山东理工大学 | A kind of method that fiberglass fibers waste silk prepares electroconductive glass fibre |
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| EP4374967A1 (en) * | 2022-11-28 | 2024-05-29 | Dfm Ip B.V. | Method for recovering mineral substrates from valuable materials containing artificial mineral fibres |
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