CN111747653A - High-thermal-stability solid waste-based continuous fiber and preparation method and application thereof - Google Patents
High-thermal-stability solid waste-based continuous fiber and preparation method and application thereof Download PDFInfo
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- C03—GLASS; MINERAL OR SLAG WOOL
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- 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
- C03C13/00—Fibre or filament compositions
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Abstract
The invention belongs to the technical field of inorganic continuous fiber preparation, and particularly relates to high-thermal-stability solid waste base continuous fiber, and a preparation method and application thereof. According to the preparation method of the high-thermal-stability solid waste-based continuous fiber, the raw materials are mixed to prepare a mixture, the mixture is melted and homogenized in a high-temperature furnace to form drawn clinker, all the included crystals are ensured to be melted into amorphous glass state, the drawn clinker is naturally cooled or directly transferred into a drawing furnace, the cooled clinker is placed into the drawing furnace to be heated at constant temperature, drawing is carried out through a platinum-rhodium alloy bushing plate, and the drawing speed is controlled; and (3) carrying out surface infiltration on a rolling coating machine, then automatically rolling and infiltrating, and finally winding an upper roller on the fiber at a wire drawing outlet to prepare the solid waste base continuous fiber. The invention matches the raw materials of the pulverized coal ash and the magnesium slag, controls the proportion of the mixture, and plays the coordination role of each component in the melting process through the high-temperature melting process, thereby improving the surface state of the fiber and enhancing the tensile strength of the fiber.
Description
Technical Field
The invention belongs to the technical field of inorganic continuous fiber preparation, and particularly relates to high-thermal-stability solid waste base continuous fiber, and a preparation method and application thereof.
Background
The inorganic fibers mainly include carbon fibers, glass fibers, basalt fibers and the like. The carbon fiber has long preparation process, high raw material price and high market price due to production cost, and is mainly used in the fields of military, aviation and the like; the glass fiber mainly uses silicate resources such as quartz and the like which are adopted from the nature as raw materials, and the basalt fiber uses basalt from the nature as raw materials, and the basalt fiber and the raw materials have the common characteristic that the raw materials are melted at high temperature and are drawn into fiber. The basic performances of the three fibers are respectively characterized in that the carbon fibers have low density, high strength and corrosion resistance, but can be oxidized under the high-temperature condition in the air, and the strength is rapidly reduced; the glass fiber has various types and different performances, the strength is greatly related to the alkali content in the glass fiber, and the glass fiber is not resistant to high temperature (<450 ℃), has large brittleness and limits the wide application; the basalt fiber has a wide range of use temperature, can be used at-260 ℃ to 600 ℃, but has low wire drawing stability and fiber performance stability due to large fluctuation of raw material components, the strength is kept about 60% after the basalt fiber is treated at 400 ℃, the high temperature resistance stability of the basalt fiber needs to be improved, and the large-scale use of the basalt fiber is limited to a certain extent.
In 1973, fly ash and clay used by the former SoviumonMosco building engineering research institute were mixed and melted in an electric furnace and then drawn into fibers to prepare fly ash fibers, which have good corrosion resistance and high temperature resistance. The Italian scholars G.Brusatin prepares inorganic fibers by mixing municipal waste incineration ash with waste glass slag, and the tensile strength of the inorganic fibers can reach 1.21GPa at most. Similarly, Italian scholars S.Hreglich prepares the solid waste base inorganic continuous fiber by mixing various fly ashes, sodium carbonate and sodium borate, and the tensile strength can reach 300 MPa. The development of the field is greatly promoted by the high-value utilization research of solid waste resources and the development of the inorganic fiber market in recent years. The glass fiber is prepared by matching fly ash with chemical reagents such as silicon oxide, calcium carbonate, magnesium carbonate and the like at the university of east China, the content of the fly ash can reach 55 percent at most, and when the content of the fly ash is 45 percent, the tensile strength of the obtained fiber can reach 420MPa at most.
Patent document CN105366946A discloses a method for preparing continuous fibers by using fly ash, which comprises the following steps: taking 80-90% of fly ash, adding calcium oxide, magnesium oxide and other additives, mixing, melting for 2-3 h at the temperature of 1550-1650 ℃, flowing into a bushing plate through a material channel, and drawing to form fibers at 1350-1400 ℃ through drawing equipment. Patent document CN105366947A discloses a method for preparing continuous fibers by using fly ash, which comprises the following steps: 80-85% of fly ash, 12-16% of sodium oxide, 2-4% of magnesium oxide and 1-3% of additive are taken. After mixing and melting for 2-3 h at 1500-1550 ℃, the mixture flows into a floor slab through a material channel and is drawn into fibers at 1150-1200 ℃ by drawing equipment. Patent document CN105384353A discloses a method for preparing continuous fibers by using fly ash, which comprises the following steps: taking 77-80% of fly ash, 10-11% of sodium oxide, 4-6% of potassium oxide, 2-4% of magnesium oxide and 2-6% of additive. After being mixed, the mixture is melted for 2 to 3 hours at 1600 to 1650 ℃, flows into a bushing plate through a material channel, and is drawn into fibers at 1350 to 1400 ℃ through drawing equipment. Patent document CN104261669A discloses a method for preparing continuous basalt fiber by using industrial solid waste, which specifically comprises the following steps: the method comprises the steps of taking fly ash and coal gangue as main raw materials, taking iron tailings, red mud containing titanium and aluminum oxide and the like as additives, mixing the raw materials in proportion to form a mixed material, melting at the high temperature of 1350-1550 ℃ for 4-8 h, and directly introducing the mixed material into a wire-drawing melting furnace through a high-temperature-resistant guide device, wherein the temperature of the melting furnace is controlled at 1250-1550 ℃. At the temperature of 1250-1330 ℃, a platinum-rhodium bushing with 200 holes is adopted for fiber drawing.
The prior art is limited to using fly ash as raw material, and adjusting the composition ratio of the raw material by adding some or one of chemical additives, such as sodium oxide, magnesium oxide, calcium oxide, potassium oxide, zinc oxide, magnesium oxide and titanium oxide, etc., as described in the three previous patent documents. Or adding iron tailings, red mud and the like to control the chemical composition of the raw materials. The chemical auxiliary agents are generally relatively expensive and have high preparation cost. Besides, no matter which chemical additives are adopted for compounding, essentially, the final chemical composition is within the established composition range of the mature basalt fiber (see table 1), and the successful drawing of the fiber is ensured.
TABLE 1 chemical composition Range of basalt fibers
The short fibers such as mineral wool fibers, mineral wool boards, heat preservation cotton and short fibers for paper pulp are relatively early prepared by using the fly ash in China, and the research on fly ash-based continuous fibers is very late. Due to the limitation of the length of the short fiber, the function of the continuous long fiber cannot be exerted, which is a waste in resource utilization and functional application. Therefore, the development of fly ash-based continuous fibers is a necessary trend.
Disclosure of Invention
Aiming at the problems, the invention provides a high-thermal-stability solid waste base continuous fiber, a preparation method and application thereof.
The invention aims to prepare inorganic fiber by utilizing coal-based solid wastes such as fly ash, magnesium slag and the like, highlight the high-temperature resistance advantage performance of the inorganic fiber, realize high-valued utilization of solid waste resources, simultaneously prepare the fiber with high cost performance, partially replace continuous fiber products of glass fiber and basalt fiber, and make contribution to the requirements of the solid waste resource utilization and the chemical fiber field in China.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high thermal stability solid waste base continuous fiber is prepared by the following steps:
step 1, preparing drawing clinker: mixing the components of the raw materials to prepare a mixture, melting and homogenizing the mixture in a high-temperature furnace to form drawing clinker, ensuring that all the included crystals are completely melted into amorphous glassy state, and naturally cooling or directly transferring the amorphous glassy state into a drawing furnace;
step 2, drawing and forming fiber: putting the cooled clinker into a wire drawing furnace for constant-temperature heating, drawing wires through a platinum rhodium bushing, and controlling the wire drawing speed;
step 3, online infiltration of the fiber surface: and (3) carrying out surface infiltration on a rolling coating machine, then automatically rolling and infiltrating, and finally winding an upper roller on the fiber at a wire drawing outlet to prepare the solid waste base continuous fiber.
Further, the raw materials comprise the following components in parts by weight: 1-4 parts of fly ash, 1-2 parts of magnesium slag and 0-3 parts of fluxing agent; the fluxing agent comprises one or a mixture of more of potassium feldspar, albite, dolomite, kaolin, steel slag and labrador in any proportion.
Still further, the fly ash comprises the following substances: SiO 2240～55％，Al2O325～38％，CaO22.0～6.0％，MgO 0.10～2.0％，TiO2<2.0％，Na2O<1.0％，K2O<1.9％，Fe2O33.0～9.0％；
The magnesium slag comprises the following substances: SiO 2220～31.5％，Al2O31.1～5.6％，CaO 38～55％，MgO 10～15％，TiO2<0.50％，Na2O<3.0％，K2O<3.5％；
The potassium feldspar comprises the following components: SiO 2250～65％,Al2O310～20％,CaO<2.0％,MgO<1.5％,Na2O<3.0％,K2O 8～15％，Fe2O3<1.0％；
The albite comprises the following components: SiO 2240～60％,Al2O310～21％,CaO<6.0％,MgO1.2～4.6％，Na2O<7.3％，K2O<3.9％，Fe2O3<1.3％；
The steel slag comprises the following components: SiO 2215～18％，Al2O32～5％，CaO 35～42％，MgO<4.0％，Na2O<1.0％，Fe2O315～23％。
Further, the melting temperature in the step 1 is 1270-1450 ℃, and the melting time is 6-9 h; in the step 2, the heating temperature is 1250-1420 ℃, and the heating time is 1.0-6.0 h; in the step 1, the mass percentage of the silicon oxide and the aluminum oxide in the mixture is controlled to be 52-80%, and the molar ratio of silicon to aluminum is controlled to be 4-6.5; the acidity coefficient range of the mixture in the step 1 is 1.5-5.0; the above-mentionedControlling the viscosity of clinker to be 1.5-25 Pa.s in the constant-temperature heating process of the wire drawing furnace; and in the step 2, the wire drawing speed is 1-10 m/s. The acidity index of a fiber is defined as: sum of acid oxide masses (SiO)2+Al2O3) And the sum of the masses of the basic oxides (CaO + MgO).
A method for preparing high thermal stability solid waste based continuous fiber according to any one of claims 1 to 4, comprising the steps of:
step 1, preparing drawing clinker: mixing the components of the raw materials to prepare a mixture, melting and homogenizing the mixture in a high-temperature furnace to form drawing clinker, ensuring that all the included crystals are completely melted into amorphous glassy state, and naturally cooling or directly transferring the amorphous glassy state into a drawing furnace;
step 2, drawing and forming fiber: putting the cooled clinker into a wire drawing furnace for constant-temperature heating, drawing wires through a platinum rhodium bushing, and controlling the wire drawing speed;
step 3, online infiltration of the fiber surface: and (3) carrying out surface infiltration on a rolling coating machine, then automatically rolling and infiltrating, and finally winding an upper roller on the fiber at a wire drawing outlet to prepare the solid waste base continuous fiber.
Further, 1-4 parts of fly ash, 1-2 parts of magnesium slag and 0-3 parts of fluxing agent; the fluxing agent comprises one or a mixture of more of potassium feldspar, albite, dolomite, kaolin, steel slag and labrador in any proportion.
Still further, the fly ash comprises the following substances: SiO 2240～55％，Al2O325～38％，CaO22.0～6.0％，MgO 0.10～2.0％，TiO2<2.0％，Na2O<1.0％，K2O<1.9％，Fe2O33.0～9.0％；
The magnesium slag comprises the following substances: SiO 2220～31.5％，Al2O31.1～5.6％，CaO 38～55％，MgO 10～15％，TiO2<0.50％，Na2O<3.0％，K2O<3.5％；
The potassium feldspar comprises the following components: SiO 2250～65％,Al2O310～20％,CaO<2.0％,MgO<1.5％,Na2O<3.0％,K2O 8～15％，Fe2O3<1.0％；
The albite comprises the following components: SiO 2240～60％,Al2O310～21％,CaO<6.0％,MgO1.2～4.6％，Na2O<7.3％，K2O<3.9％，Fe2O3<1.3％；
The steel slag comprises the following components: SiO 2215～18％，Al2O32～5％，CaO 35～42％，MgO<4.0％，Na2O<1.0％，Fe2O315～23％。
Further, the melting temperature in the step 1 is 1270-1450 ℃, and the melting time is 6-9 h; in the step 2, the heating temperature is 1250-1420 ℃, and the heating time is 1.0-6.0 h; in the step 1, the mass percentage of the silicon oxide and the aluminum oxide in the mixture is controlled to be 52-80%, and the molar ratio of silicon to aluminum is controlled to be 4-6.5; the acidity coefficient range of the mixture in the step 1 is 1.5-5.0; the viscosity of clinker is controlled to be 1.5-25 Pa.s in the constant-temperature heating process of the wire drawing furnace; and in the step 2, the wire drawing speed is 1-10 m/s.
An application of high-thermal-stability solid waste-based continuous fibers is used for preparing inorganic fiber continuous fibers from coal-based solid waste.
Compared with the prior art, the invention has the following advantages:
the invention takes fly ash and magnesium slag as main raw materials, and basically no natural mineral raw materials or a small amount of natural mineral raw materials are added. The chemical composition of the compound raw materials or the chemical composition of the fiber of the direct mixed melting wire drawing is different from the set composition range of the basalt, so that a new formula composition is explored by taking industrial solid waste resources as main raw materials, the fiber can be melted and drawn, and the nuclear magnetic analysis result shows that AlO inside the fiber6Octahedral structure and transition valence aluminum AlO5The increase of the total content of the structure has outstanding contribution to the high-temperature resistance of the fiber and combines with SiO4Tetrahedron and AlO4The network structure formed by tetrahedrons also contributes to the improvement of the fiber modulus. Passing throughThe chemical composition can improve the AlO in the fiber6Octahedral structure and transition valence aluminum AlO5Of construction
The total content of the fiber can improve the index retention rate of the fiber such as high temperature resistance, high temperature strength modulus and the like. The successful research and development of the product can be widely applied to the high-temperature resistant field, such as fire-proof ropes, fire-proof cloth and fire-proof woven body weighing parts.
The invention analyzes the chemical components of the pulverized coal ash and the magnesium slag, utilizes the analysis result to match two solid waste raw materials, controls the proportion of the mixture, and plays the coordination role of the components in the melting process through the high-temperature melting process to form glassy state clinker with uniform components. The key point of the melting step is that the surface infiltration is realized during the wire drawing process, the surface state of the fiber is improved, and the tensile strength of the fiber is enhanced.
Drawings
FIG. 1 is a diagram of a continuous fiber prepared in example 1;
FIG. 2 is a diagram of a continuous fiber prepared in example 2;
FIG. 3 is a diagram of a continuous fiber prepared in example 3.
Detailed Description
The fly ash is taken from a certain power plant in Shanxi as coal-fired boiler ash, the magnesium slag is taken from a certain filial piety factory in Shanxi, and the steel slag is taken from a certain steel group in Shanxi.
Example 1
Crushing magnesium slag to below 100 meshes, uniformly mixing 1 part of the magnesium slag and 1 part of fly ash (below 200 meshes), melting at 1350 ℃, carrying out homogenization treatment for 8 hours, cooling to form clinker, or directly transferring the clinker into a wire drawing furnace, keeping the temperature at 1270-1290 ℃ for 0.5 hours, and carrying out wire drawing to form fibers, wherein the melt viscosity is controlled to be 10-25 Pa.s, and the wire drawing rate is controlled to be 5-8 m/s. The fiber passes through the drum-type infiltration device at the filament outlet, realizes fast cooling infiltration fibre surface. The diameter of the obtained fiber is 25-26 μm, the tensile strength is 900MPa, and the tensile modulus is 11.61 GPa. As shown in the continuous fiber diagram of fig. 1. According to the detection of national standard (GB/T31957-2015), the loss rates of acid resistance and alkali resistance at normal temperature are respectively 2.3 wt% and 1.89 wt%. Nuclear magnetic analysis shows AlO6Octahedra and transitionAlO of valence aluminum5The total content of the structure is 45.31%, the strength retention rate is 61% and 44% respectively and the elastic modulus retention rate is 72% and 65% respectively after heat treatment at 400 ℃ and 500 ℃ for 1 h.
Example 2:
crushing magnesium slag to below 100 meshes, uniformly mixing 2 parts of fly ash (below 200 meshes), potassium feldspar and albite 1 part of each, melting at 1450 ℃, carrying out homogenization treatment for 7h, cooling to form clinker, or directly transferring the clinker into a wire drawing furnace, keeping the temperature constant at 1400-1422 ℃ for 0.5h, drawing to form fibers, controlling the melt viscosity to be 11-22 Pa.s, and controlling the wire drawing speed to be 6-7 m/s. The fiber passes through the drum-type infiltration device at the filament outlet, realizes fast cooling infiltration fibre surface. The diameter of the obtained fiber is 12-15 mu m, the tensile strength is 1213MPa, the tensile modulus is 15.26GPa, as shown in a continuous fiber diagram in figure 2, the highest use temperature is less than or equal to 550 ℃, and the loss rates of acid resistance and alkali resistance at normal temperature are respectively 2.06 wt% and 1.87 wt% according to the detection of national standard (GB/T31957-2015). Nuclear magnetic analysis shows AlO6Octahedron and transition valence aluminum AlO5The total content of the structure is 50.00 percent, the strength retention rate is 67 percent and 43 percent respectively after heat treatment at 400 ℃ and 550 ℃ for 1h, and the elastic modulus retention rate is 85 percent and 73 percent respectively.
Example 3:
crushing steel slag to below 100 meshes, uniformly mixing 0.5 part of crushed steel slag (below 100 meshes) and 4 parts of fly ash (below 200 meshes), potassium feldspar and albite respectively 1 part at 1440 ℃, carrying out homogenization treatment for 8h, cooling to form clinker or directly transferring the clinker into a wire drawing furnace, keeping the temperature at 1350-1370 ℃ for 0.5h, drawing to form fiber, controlling the melt viscosity at 12-23 Pa.s, controlling the wire drawing rate at 5-7 m/s, and enabling the fiber to pass through a roller type infiltration device at a fiber outlet to realize rapid cooling and infiltration on the surface of the fiber. The tensile strength of the obtained fiber is 1150MPa, the tensile modulus is 12.44GPa, as shown in a continuous fiber chart in figure 3, the highest using temperature is less than or equal to 600 ℃, and the loss rates of acid resistance and alkali resistance at normal temperature are respectively 2.25 wt% and 1.96 wt% according to the national standard (GB/T31957-2015). Nuclear magnetic analysis shows AlO6Octahedron and transition valence aluminum AlO5The total content of the structure is 65.00 percent, the heat treatment is carried out for 1 hour at 500 ℃ and 600 ℃, and the strength retention rate is keptThe retention rate of the elastic modulus is respectively 69% and 46%, and the retention rate of the elastic modulus is respectively 97% and 80%.
Table 2 chemical composition (%) -of several inorganic fibers in the examples
After the solid wastes such as fly ash, magnesium slag and the like are melted at high temperature, the internal multiphase components such as crystal and amorphous substance are fully melted to form a glass body with uniform and stable composition, structure and viscous flow property. The glass body is drawn under stress to form a fiber and the structure of the glass body is maintained during the quenching process. Conventional wisdom holds that the strength in fibers is primarily due to SiO4And AlO4Contribution of the constructed network structure. Therefore, the total composition content of silicon oxide and aluminum oxide is higher, the network structure is developed, and the mechanical property and the high temperature resistance are better. And our studies found that the SiO-based coating is formed by4Tetrahedron and AlO4Besides the network structure formed by tetrahedrons contributes to the improvement of the strength and the high-temperature resistance of the fiber, AlO is arranged in the fiber6Octahedron and transition valence aluminum AlO5The existence and the content of the structure are increased, so that the high-temperature resistance of the composite material is improved.
Those skilled in the art will appreciate that the invention may be practiced without these specific details. Although illustrative embodiments of the present invention have been described above to facilitate the understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the embodiments, and various changes may be made apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all matters of the invention which utilize the inventive concepts are protected.
Claims (9)
1. A high thermal stability solid waste base continuous fiber is characterized in that: the preparation method comprises the following steps:
step 1, preparing drawing clinker: mixing the components of the raw materials to prepare a mixture, melting and homogenizing the mixture in a high-temperature furnace to form drawing clinker, ensuring that all the included crystals are completely melted into amorphous glassy state, and naturally cooling or directly transferring the amorphous glassy state into a drawing furnace;
step 2, drawing and forming fiber: putting the cooled clinker into a wire drawing furnace for constant-temperature heating, drawing wires through a platinum rhodium bushing, and controlling the wire drawing speed;
step 3, online infiltration of the fiber surface: and (3) carrying out surface infiltration on a rolling coating machine, then automatically rolling and infiltrating, and finally winding an upper roller on the fiber at a wire drawing outlet to prepare the solid waste base continuous fiber.
2. A high thermal stability solid waste based continuous fiber as in claim 1, wherein: the raw materials comprise the following components in parts by weight: 1-4 parts of fly ash, 1-2 parts of magnesium slag and 0-3 parts of fluxing agent; the fluxing agent comprises one or a mixture of more of potassium feldspar, albite, dolomite, kaolin, steel slag and labrador in any proportion.
3. A high thermal stability solid waste based continuous fiber as in claim 2, wherein: the fly ash comprises the following substances: SiO 2240～55％，Al2O325～38％，CaO22.0～6.0％，MgO 0.10～2.0％，TiO2<2.0％，Na2O<1.0％，K2O<1.9％，Fe2O33.0～9.0％；
The magnesium slag comprises the following substances: SiO 2220～31.5％，Al2O31.1～5.6％，CaO 38～55％，MgO10～15％，TiO2<0.50％，Na2O<3.0％，K2O<3.5％；
The potassium feldspar comprises the following components: SiO 2250～65％,Al2O310～20％,CaO<2.0％,MgO<1.5％,Na2O<3.0％,K2O 8～15％，Fe2O3<1.0％；
The albite comprises the following components: SiO 2240～60％,Al2O310～21％,CaO<6.0％,MgO 1.2～4.6％，Na2O<7.3％，K2O<3.9％，Fe2O3<1.3％；
The steel slag comprises the following components: SiO 2215～18％，Al2O32～5％，CaO 35～42％，MgO<4.0％，Na2O<1.0％，Fe2O315～23％。
4. A high thermal stability solid waste based continuous fiber as in claim 1, wherein: the melting temperature in the step 1 is 1270-1450 ℃, and the melting time is 6-9 h; in the step 2, the heating temperature is 1250-1420 ℃, and the heating time is 1.0-6.0 h; in the step 1, the mass percentage of the silicon oxide and the aluminum oxide in the mixture is controlled to be 52-80%, and the molar ratio of silicon to aluminum is controlled to be 4-6.5; the acidity coefficient range of the mixture in the step 1 is 1.5-5.0; the viscosity of clinker is controlled to be 1.5-25 Pa.s in the constant-temperature heating process of the wire drawing furnace; and in the step 2, the wire drawing speed is 1-10 m/s.
5. A method for preparing high thermal stability solid waste based continuous fiber according to any one of claims 1 to 4, characterized in that: the method comprises the following steps:
step 1, preparing drawing clinker: mixing the components of the raw materials to prepare a mixture, melting and homogenizing the mixture in a high-temperature furnace to form drawing clinker, ensuring that all the included crystals are completely melted into amorphous glassy state, and naturally cooling or directly transferring the amorphous glassy state into a drawing furnace;
step 2, drawing and forming fiber: putting the cooled clinker into a wire drawing furnace for constant-temperature heating, drawing wires through a platinum rhodium bushing, and controlling the wire drawing speed;
step 3, online infiltration of the fiber surface: and (3) carrying out surface infiltration on a rolling coating machine, then automatically rolling and infiltrating, and finally winding an upper roller on the fiber at a wire drawing outlet to prepare the solid waste base continuous fiber.
6. The method for preparing high thermal stability solid waste based continuous fiber according to claim 5, wherein: the raw materials comprise the following components in parts by weight: 1-4 parts of fly ash, 1-2 parts of magnesium slag and 0-3 parts of fluxing agent; the fluxing agent comprises one or a mixture of more of potassium feldspar, albite, dolomite, kaolin, steel slag and labrador in any proportion.
7. The method for preparing high thermal stability solid waste based continuous fiber according to claim 5, wherein: the fly ash comprises the following substances: SiO 2240～55％，Al2O325～38％，CaO22.0～6.0％，MgO 0.10～2.0％，TiO2<2.0％，Na2O<1.0％，K2O<1.9％，Fe2O33.0～9.0％；
The magnesium slag comprises the following substances: SiO 2220～31.5％，Al2O31.1～5.6％，CaO 38～55％，MgO10～15％，TiO2<0.50％，Na2O<3.0％，K2O<3.5％；
The potassium feldspar comprises the following components: SiO 2250～65％,Al2O310～20％,CaO<2.0％,MgO<1.5％,Na2O<3.0％,K2O 8～15％，Fe2O3<1.0％；
The albite comprises the following components: SiO 2240～60％,Al2O310～21％,CaO<6.0％,MgO 1.2～4.6％，Na2O<7.3％，K2O<3.9％，Fe2O3<1.3％；
The steel slag comprises the following components: SiO 2215～18％，Al2O32～5％，CaO 35～42％，MgO<4.0％，Na2O<1.0％，Fe2O315～23％。
8. The method for preparing high thermal stability solid waste based continuous fiber according to claim 5, wherein: the melting temperature in the step 1 is 1270-1450 ℃, and the melting time is 6-9 h; in the step 2, the heating temperature is 1250-1420 ℃, and the heating time is 1.0-6.0 h; in the step 1, the mass percentage of the silicon oxide and the aluminum oxide in the mixture is controlled to be 52-80%, and the molar ratio of silicon to aluminum is controlled to be 4-6.5; the acidity coefficient range of the mixture in the step 1 is 1.5-5.0; the viscosity of clinker is controlled to be 1.5-25 Pa.s in the constant-temperature heating process of the wire drawing furnace; and in the step 2, the wire drawing speed is 1-10 m/s.
9. The application of high-thermal-stability solid waste-based continuous fibers is characterized in that: the method is used for preparing the inorganic fiber continuous fiber from the coal-based solid waste.
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| CN112624631A (en) * | 2020-12-17 | 2021-04-09 | 四川轻化工大学 | Inducing method of glass fiber polypropylene interface transverse crystal structure |
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