Method for preparing inorganic material through separation and carbon removal of vaporized slag

Abstract

The invention relates to the technical field of waste utilization, in particular to a method for preparing an inorganic material through separation and carbon removal of vaporized slag. The method comprises the following steps: removing carbon from the vaporized slag; mixing the vaporized slag subjected to carbon removal treatment, a conductive agent and water to obtain a mixture; placing the mixture in a fiber generation container, pressurizing to a preset pressure intensity in the atmosphere of protective gas, and then heating to a preset temperature to obtain a molten mixture; keeping the temperature and the pressure for a preset time at a preset temperature, and testing the viscosity of the molten mixture; after the preset viscosity is reached, the power supply is turned on to form a uniform electric field between the metal pipe body and the rotary receiving roller, and the rotary receiving roller rotates at the same time, so that the molten mixture is output from the metal pipe body to the rotary receiving roller to be cured to form fibers. The embodiment of the invention provides a method for preparing an inorganic material through separation and carbon removal of vaporized slag. The method can be used for preparing inorganic fibers with high additional value by using the vaporized slag.

Description

Technical Field

[0001] The present invention relates to the technical field of waste utilization, in particular to a method for preparing inorganic materials by sorting and removing carbon from vaporized slag. Background Art

[0002] Gasification slag is a solid waste composed of fine particles, produced during the gasification process. Stacking or landfilling the slag can cause land pollution and waste.

[0003] Currently, the most important high-value-added utilization of vaporized slag is to use it as a raw material to produce inorganic materials. However, the composition of vaporized slag does not fully meet the standards for producing high-quality inorganic materials. If the composition of vaporized slag is not adjusted, the quality of the resulting inorganic materials will be unstable.

[0004] In view of the above problems, there is an urgent need for a method for preparing an inorganic material after sorting and removing carbon from vaporized slag, so as to obtain a high-quality inorganic material. Summary of the Invention

[0005] The embodiment of the present invention provides a method for preparing an inorganic material by sorting and removing carbon from vaporized slag. The method can prepare an inorganic material by sorting and removing carbon from vaporized slag, and can obtain a high-quality inorganic material.

[0006] An embodiment of the present invention provides a method for preparing an inorganic material by separating and removing carbon from vaporized slag, comprising:

[0007] The vaporized slag is sorted to obtain vaporized slag groups with different particle size ranges;

[0008] Placing different vaporized slag groups in a hot air sorting device; wherein the hot air sorting device includes multiple sorting units, each of which includes a silo and a deposition silo located below the silo, the multiple silos are respectively used to hold different vaporized slag groups, the silos are provided with strip-shaped connecting holes at the bottom, the connecting holes connecting the silos and the deposition silos, and each deposition silo is penetrated by a gas pipeline, the length of the strip-shaped gas outlet of the gas pipeline matching the length of the connecting hole;

[0009] The gas pipeline is used to output high-temperature gas into the deposition chamber, so that the powder falling into the communicating hole is heated and decarbonized under the action of the high-temperature gas, and obtains an initial velocity under the action of the gas force, so that particles with different densities eventually fall into different areas at the bottom of the deposition chamber, and primary powders with different main components are collected at different positions at the bottom of each deposition chamber, and the main components in the primary powders are purified to obtain purified powders;

[0010] Powder is weighed from the purified powder according to a preset ratio, and the mixture is evenly mixed to prepare an inorganic material.

[0011] In a possible design, before outputting the high-temperature gas into the deposition chamber using the gas pipeline, the method further includes:

[0012] The flow rate of the high-temperature gas output from the gas pipeline is determined according to the particle size range of the particles in the silo.

[0013] In a possible design, multiple sorting units are stacked, the height of the silo is the same as the height of the deposition silo, the silo is located above the deposition silo of the same sorting unit on the side where the gas pipeline is provided, the right-angle space formed by the silo and the deposition silo of one sorting unit is spliced with the deposition silo of another sorting unit, and the silos of the two adjacent sorting units are located in different directions.

[0014] In one possible design, purifying the main components in the primary powder to obtain purified powder includes:

[0015] placing the primary powder, whose main component is calcium oxide, in water, and filtering to obtain a first filtrate and a first filter residue;

[0016] The first filtrate is passed through with carbon dioxide to obtain calcium carbonate precipitation after sufficient reaction;

[0017] The calcium carbonate precipitate is filtered out and calcined to obtain purified calcium oxide powder.

[0018] In one possible design, purifying the main components in the primary powder to obtain purified powder includes:

[0019] placing the primary powder, whose main component is silicon dioxide, in water and filtering to obtain a second filter residue;

[0020] The first filter residue and the second filter residue are added to concentrated hydrochloric acid, heated and fully dissolved to obtain silicon dioxide precipitate and a second filtrate, which are filtered to obtain purified silicon dioxide powder.

[0021] In one possible design, purifying the main components in the primary powder to obtain purified powder includes:

[0022] placing the two groups of primary powders, each mainly composed of aluminum oxide and iron oxide, in water, and filtering to obtain a third filter residue;

[0023] Adding the third filter residue to concentrated hydrochloric acid and heating to fully dissolve it to obtain a silicon dioxide precipitate and a third filtrate, which are filtered to obtain purified silicon dioxide powder;

[0024] After adjusting the pH values of the third filtrate and the second filtrate to neutral, adding an excess amount of alkaline solution and reacting sufficiently to obtain iron hydroxide precipitate;

[0025] After filtration, iron hydroxide precipitate and filtrate are obtained, and carbon dioxide is introduced into the filtrate to obtain aluminum hydroxide precipitate;

[0026] After the aluminum hydroxide precipitate and the iron hydroxide precipitate are calcined respectively, purified aluminum oxide powder and purified iron oxide powder are obtained.

[0027] In one possible design, the step of weighing powder from the purified powder according to a preset ratio and mixing the powder evenly to prepare the inorganic material includes:

[0028] Weighing powder from the purified powder according to a preset ratio, and mixing the weighed powder, a conductive agent, and water to obtain a mixture;

[0029] The mixture is placed in a fiber generation container, pressurized to a preset pressure in an atmosphere of protective gas, and then heated to a preset temperature to obtain a molten mixture; wherein the fiber generation container is connected to a plurality of injection units, each of the injection units includes a plurality of metal tubes connected to the interior of the fiber generation container, the metal tubes are made of a high-temperature alloy, the metal tubes in each injection unit are spaced uniformly, each metal tube is connected to a power supply, and a rotating receiving roller is provided at one end of the metal tube away from the fiber generation container, and the rotating receiving roller is grounded;

[0030] Maintaining the temperature and pressure at the preset temperature for a preset time, and testing the viscosity of the molten mixture;

[0031] After reaching the preset viscosity, the power supply is turned on to form a uniform electric field between the metal tube and the rotating receiving roller, and the rotating receiving roller rotates at the same time, so that the molten mixture is output from the metal tube to the rotating receiving roller and solidified to form a fibrous inorganic material.

[0032] In a possible design, the voltage applied by the power supply is 20-40 kV, the rotation speed of the rotating receiving roller is 1500-5500 rpm, and the intervals between the metal tubes are 2-5 cm.

[0033] In a possible design, the preset temperature is 900-1000° C., and the preset pressure is 22-30 MPa.

[0034] In a possible design, the mass fraction of water in the mixture is 4-8%.

[0035] Compared with the prior art, the present invention has at least the following beneficial effects:

[0036] In this application, in order to obtain high-quality inorganic materials, the various substances in the vaporized slag need to be within a reasonable range. However, vaporized slag is a mixture of multiple substances, making it difficult to precisely adjust the composition of each substance. Therefore, the obtained raw vaporized slag needs to be processed. First, the vaporized slag is sorted into vaporized slag groups with different particle size ranges using a sorting device such as a screen. The different groups of vaporized slag groups are placed in different silos. The connecting holes below the silos are relatively thin, and the width can be 1.2 to 2.5 times the maximum particle size of the vaporized slag group. The vaporized slag in the silo falls into the deposition silo through the connecting holes, forming a planar solid flow during the fall. The deposition silo is penetrated by a gas pipeline, and the power source of the gas pipeline is controlled to blow out a high-temperature laminar flow from its outlet. The high-temperature laminar flow contacts the planar solid flow. Due to the thin thickness of the solid flow, after contact with the high-temperature laminar flow, the high temperature oxidizes the residual carbon in the vaporized slag, completing the carbon removal. At the same time, the high-temperature laminar flow gives the planar solid flow an initial velocity, causing the trajectory of its particles to be parabolic. The density of each oxide in the vaporized slag, such as aluminum oxide, silicon dioxide, calcium oxide and iron oxide, is different, but the particle size is basically the same, so the mass of each oxide is different, and therefore, the distance of its lateral movement is different. In summary, the particles of different components fall into the bottom of the sedimentation bin at different lateral distances, thereby completing the decarbonization and preliminary sorting of each oxide, and obtaining primary powders with different main components. After obtaining the primary powder, its main components are purified. After completing the decarbonization and preliminary sorting, the purification efficiency of the main components of the primary powder is higher and more convenient. After the purification is completed, a purified powder with higher purity is obtained. The purified powder is weighed and mixed under a reasonable preset ratio, and then the mixed powder weighed and mixed according to the preset ratio is used to prepare the inorganic material, which can obtain high-quality inorganic materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 A schematic structural diagram of a hot air separation device provided in an embodiment of the present invention;

[0039] Figure 2 A schematic structural diagram of a device for fiber preparation provided in an embodiment of the present invention.

[0040] In the picture:

[0041] 201- Silo;

[0042] 202- Sedimentation chamber;

[0043] 203-gas pipeline;

[0044] 100-enclosed space;

[0045] 1-Fiber generation container;

[0046] 2- injection unit;

[0047] 21-Metal pipe body;

[0048] 3- Power supply;

[0049] 4-rotating receiving roller;

[0050] 5-High temperature and high pressure valve;

[0051] 6-Gas pipeline;

[0052] 7-pressure regulating pipeline;

[0053] 8-Cooling pipes. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0055] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "plurality" refers to two or more; the terms "connected" and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the description of this specification, it should be understood that the directional terms such as "upper" and "lower" described in the embodiments of the present invention are described from the perspectives shown in the accompanying drawings and should not be understood as limiting the embodiments of the present invention. In addition, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" of another element, it can not only be directly connected "upper" or "lower" of the other element, but also indirectly connected "upper" or "lower" of the other element through an intermediate element.

[0057] like Figure 1 As shown, an embodiment of the present invention provides a method for preparing inorganic materials by separating and removing carbon from vaporized slag, comprising:

[0058] The vaporized slag is sorted to obtain vaporized slag groups with different particle size ranges;

[0059] Different vaporized slag groups are placed in a hot air sorting device; wherein the hot air sorting device includes multiple sorting units, each of which includes a silo 201 and a deposition silo 202 located below the silo 201. The multiple silos 201 are respectively used to hold different vaporized slag groups. The silos 201 have strip-shaped connecting holes at the bottom, connecting the silos 201 and the deposition silo 202. Each deposition silo 202 is penetrated by a gas pipeline 203, and the length of the strip-shaped gas outlet of the gas pipeline 203 matches the length of the connecting hole.

[0060] High-temperature gas is delivered to the deposition chamber 202 via the gas pipeline 203, causing the powder falling from the communicating hole to be heated and decarbonized by the high-temperature gas. The powder is then subjected to an initial velocity by the gas force, causing particles of different densities to eventually fall into different areas at the bottom of the deposition chamber 202. Preliminary powders with different main components are collected at different locations at the bottom of each deposition chamber 202, and the main components of the preliminarily separated powders are purified to obtain purified powders.

[0061] Powder is weighed from the purified powder according to a preset ratio, and the inorganic material is prepared after being mixed evenly.

[0062] In the present application, in order to obtain high-quality inorganic materials, it is necessary that each substance in the vaporized slag is within a reasonable range. However, vaporized slag is a mixture of multiple substances, and it is difficult to precisely adjust the composition of each substance. Therefore, the obtained raw vaporized slag needs to be processed. First, the vaporized slag is sorted into vaporized slag groups with different particle size ranges using a sorting device such as a screen. The different groups of vaporized slag groups are placed in different silos 201. The connecting holes below the silo 201 are relatively thin, and the width can be 1.2 to 2.5 times the maximum particle size of the vaporized slag group. The vaporized slag in the silo 201 falls into the deposition silo 202 through the connecting holes, and a surface solid flow is formed during the falling process. The deposition silo 202 is penetrated by a gas pipeline 203, and the power source of the gas pipeline 203 is controlled so that a high-temperature laminar flow is blown out of the outlet. The high-temperature laminar flow contacts the surface solid flow. Since the solid flow is relatively thin, after contacting the high-temperature laminar flow, the high temperature oxidizes the residual carbon in the vaporized slag, completing the decarbonization. At the same time, the high-temperature laminar flow gives the planar solid flow an initial velocity, so that the motion trajectory of its particles is a parabola. The density of each oxide in the vaporized slag, such as aluminum oxide, silicon dioxide, calcium oxide and iron oxide, is different, and the particle size is basically the same. Therefore, the mass of each oxide is different, and therefore, the distance of its lateral movement is different. In summary, the particles of different components fall into the bottom of the sedimentation bin 202 at different lateral distances, thereby completing the decarbonization and preliminary sorting of each oxide, and obtaining primary powders with different main components. After obtaining the primary powder, its main components are purified. After completing the decarbonization and preliminary sorting, the purification efficiency of the main components of the primary powder is higher and more convenient. After the purification is completed, a purified powder with higher purity is obtained. The purified powder is weighed and mixed under a reasonable preset ratio, and then the mixed powder weighed and mixed according to the preset ratio is used to prepare the inorganic material, and high-quality inorganic materials can be obtained.

[0063] In this embodiment, the inorganic material may be inorganic fiber or inorganic plate.

[0064] In some embodiments of the present invention, before the high-temperature gas is output to the deposition chamber 202 via the gas pipeline 203, the following steps are further included:

[0065] The flow rate of the high-temperature gas output from the gas pipeline 203 is determined according to the particle size range of the particles in the silo 201 .

[0066] In this embodiment, due to the different particle sizes in the silo 201, the wind speed can be adjusted according to the particle size to improve the sorting effect. The wind speed cannot be too slow, otherwise the sorting effect will be poor, but it cannot be too fast, otherwise laminar flow cannot be formed.

[0067] In some embodiments of the present invention, multiple sorting units are stacked, the height of the silo 201 is the same as the height of the deposition silo 202, the silo 201 is located above the side of the deposition silo 202 of the same sorting unit where the gas pipeline 203 is provided, and the right-angle space formed by the silo 201 and the deposition silo 202 of one sorting unit is spliced with the deposition silo 202 of another sorting unit, and the silos 201 of the two adjacent sorting units are located in different directions.

[0068] In this embodiment, stacking multiple sorting units can save space. Since the longitudinal section of the sorting unit is L-shaped, the silo 201 of each sorting unit needs to be set in a different direction.

[0069] In some embodiments of the present invention, purifying the main components of the primary powder to obtain the purified powder comprises:

[0070] placing the primary powder, whose main component is calcium oxide, in water, and filtering to obtain a first filtrate and a first filter residue;

[0071] The first filtrate is passed through with carbon dioxide to obtain calcium carbonate precipitation after sufficient reaction;

[0072] The calcium carbonate precipitate is filtered out and calcined to obtain purified calcium oxide powder.

[0073] The calcium oxide content in the original vaporized slag is not high, and rapid purification requires multiple washings and dissolution with large amounts of water. However, in this embodiment, a primary separation powder with a high calcium oxide content is obtained after preliminary separation. The primary separation powder is mixed with water. Due to the high calcium oxide content in the primary separation powder, the water can quickly dissolve the calcium oxide in large quantities and saturate the water, thereby completing the purification of the calcium oxide in subsequent steps.

[0074] In some embodiments of the present invention, purifying the main components of the primary powder to obtain the purified powder comprises:

[0075] placing the primary powder, whose main component is silicon dioxide, in water and filtering to obtain a second filter residue;

[0076] The first filter residue and the second filter residue are added to concentrated hydrochloric acid, heated and fully dissolved to obtain silicon dioxide precipitate and a second filtrate, which are filtered to obtain purified silicon dioxide powder.

[0077] In this embodiment, the first filter residue after calcium oxide purification primarily contains oxides of silicon, aluminum, and iron. A second filter residue, after being washed with running water to remove calcium oxide, is mixed with the first filter residue. Of course, the filtrate after washing can also be subjected to precipitation and calcination to purify calcium oxide. Both the first and second filter residues primarily contain oxides of silicon, aluminum, and iron. After mixing, concentrated hydrochloric acid is added and heated to dissolve the aluminum oxide and aluminum oxide, resulting in a silicon dioxide precipitate and a second filtrate.

[0078] In some embodiments of the present invention, purifying the main components of the primary powder to obtain the purified powder comprises:

[0079] placing the two groups of primary powders, each mainly composed of aluminum oxide and iron oxide, in water, and filtering to obtain a third filter residue;

[0080] Adding the third filter residue to concentrated hydrochloric acid and heating to fully dissolve it to obtain a silicon dioxide precipitate and a third filtrate, which are filtered to obtain purified silicon dioxide powder;

[0081] After adjusting the pH values of the third filtrate and the second filtrate to neutral, adding an excess amount of alkaline solution and reacting sufficiently to obtain iron hydroxide precipitate;

[0082] After filtration, iron hydroxide precipitate and filtrate are obtained, and carbon dioxide is introduced into the filtrate to obtain aluminum hydroxide precipitate;

[0083] After the aluminum hydroxide precipitate and the iron hydroxide precipitate are calcined respectively, purified aluminum oxide powder and purified iron oxide powder are obtained.

[0084] The primary powder, consisting primarily of aluminum oxide and iron oxide, is placed in water and filtered to obtain a third filter residue. The third filter residue is then heated again with concentrated hydrochloric acid to obtain a silicon dioxide precipitate and a third filtrate. The second and third filtrates, both containing aluminum chloride and iron chloride, are adjusted to neutrality, and then an excess of sodium hydroxide is added to obtain an iron hydroxide precipitate, which is then calcined to obtain iron oxide. The aluminum chloride in the filtrate reacts with sodium hydroxide to obtain NaAlO2. After filtering out the iron hydroxide precipitate, carbon dioxide is introduced into the solution to obtain an aluminum hydroxide precipitate, which is then calcined to obtain aluminum oxide.

[0085] It should be noted that sequential purification can obtain a high-purity purified product, wherein some oxides are purified multiple times, further improving the purity of the purified product.

[0086] like Figure 2 In some embodiments of the present invention, powder is weighed from the purified powder according to a preset ratio, and mixed uniformly to prepare an inorganic material, comprising:

[0087] Weighing powder from the purified powder according to a preset ratio, and mixing the weighed powder, a conductive agent, and water to obtain a mixture;

[0088] The mixture is placed in a fiber generation container 1 and pressurized to a preset pressure in a protective gas atmosphere, and then heated to a preset temperature to obtain a molten mixture; wherein the fiber generation container 1 is connected to a plurality of injection units 2, each injection unit 2 includes a plurality of metal tubes 21 connected to the interior of the fiber generation container 1, and the preparation material of the metal tubes 21 is a high-temperature alloy. In each injection unit 2, the intervals between the metal tubes 21 are the same, and each metal tube 21 is connected to a power supply 3 ( Figure 1 Only one electrical connection line between the metal tube 21 and the power supply 3 is shown, and the other electrical connection lines are not shown). A rotating receiving roller 4 is provided at one end of the metal tube 21 away from the fiber generating container, and the rotating receiving roller 4 is grounded;

[0089] Maintaining the temperature and pressure at a preset temperature for a preset time and testing the viscosity of the molten mixture;

[0090] After reaching the preset viscosity, the power supply 3 is turned on to form a uniform electric field between the metal tube 21 and the rotating receiving roller 4. At the same time, the rotating receiving roller 4 rotates to output the molten mixture from the metal tube 21 to the rotating receiving roller 4 to solidify and form fibers.

[0091] The main technique for producing inorganic fibers is melt-drawing basalt particles, which requires precise control of temperature and viscosity. However, the composition and particle size of vaporized slag are not stable, making it difficult to produce high-quality fibers using current melt-drawing methods.

[0092] In the present application, the vaporized slag is first decarbonized, and then the decarbonized vaporized slag, a conductive agent and water are mixed to obtain a mixture; wherein the conductive agent can greatly increase the electrical conductivity of the mixture after melting, and the water can destroy the silicon dioxide tetrahedron network of the vaporized slag, greatly reducing the viscosity of the mixture after melting. After obtaining the mixture, it is placed in a fiber generation container 1, and in a protective gas atmosphere, the pressure in the fiber generation container 1 is increased to a preset pressure, and then the temperature is raised to a preset temperature, for example, by a high-temperature resistor or by electromagnetic induction heating. At the preset pressure and preset temperature, the water in the mixture is in a supercritical state and melts into the molten mixture to achieve the destruction of the silicon dioxide tetrahedron. It should be noted that if there is no high pressure, the water will escape from the molten mixture in the form of water vapor, and the viscosity of the molten mixture cannot be effectively reduced. The mixture is kept warm at high temperature and high pressure for a preset time. After the water is fully dissolved and the viscosity is fully reduced to the preset viscosity, the power supply 3 is turned on to form a uniform electric field between the metal tube body 21 and the rotating receiving roller 4. The molten mixture is ejected from the metal tube body 21. Under the action of the conductive agent, the molten mixture is charged. The molten mixture ejected from the metal tube body 21 forms a Taylor cone under the action of the electric field, that is, the ejected liquid is dispersed into multiple micron or nanometer-scale fluids. The water evaporates in the process of forming the fluid. The surface of the micro-nanoscale fluid is extremely small and the cooling speed is extremely fast. During the ejection process, the temperature and pressure are rapidly reduced to form solid fiber filaments, which are finally collected on the rotating rotating receiving roller 4.

[0093] In this embodiment, each spraying unit 2 includes a plurality of metal tubes 21 , and the fibers generated by adjacent metal tubes 21 are automatically entangled into tows during the solidification and collection process, that is, each spraying unit 2 can obtain a bundle of fiber tows.

[0094] In this embodiment, the metal tube 21 may be made of a platinum-rhodium alloy or a titanium alloy.

[0095] In some embodiments of the present invention, the fiber generating container 1 is connected to an air pump via a gas pipeline 6 , and the fiber generating container 1 is connected to the plurality of injection units 2 via a high-temperature and high-pressure valve 5 ;

[0096] The fiber generating container 1 is located in a closed space 100, which is connected to the outside through a pressure regulating pipe 7 and a cooling pipe 8;

[0097] After reaching the preset viscosity, it also includes:

[0098] The air pressure in the enclosed space 100 is adjusted through the pressure regulating pipe 7 to control the rate at which the fluid is output from the metal tube 21;

[0099] The temperature in the closed space 100 is lowered by the cooling pipe 8 .

[0100] In this embodiment, a protective gas can be introduced into the fiber generation container 1 through the gas pipe 6, and the pressure can be increased by a compression device such as an air pump or a compression pump. During the heat preservation stage, the fluid cannot be output through the metal tube body 21. Therefore, a high-temperature and high-pressure valve 5 is provided. The high-temperature and high-pressure valve 5 can be composed of a high-temperature and high-pressure resistant silicon carbide ball valve and a high-purity flexible graphite seal. After the preset viscosity is met, the high-temperature and high-pressure valve 5 can be opened to output the fluid. After the valve is opened, the high pressure in the fiber generation container 1 is the driving force for the fluid to be ejected. The metal tube body 21 is located in the same plane and is in the liquid. The pressure received is the same, the pressure of the jet is the same, and the outflow velocity is the same. Therefore, uniform and stable fibers can be obtained.

[0101] It should be noted that the pressure regulating pipe 7 and the cooling pipe 8 can be the same pipe, and a compressed cooling medium, such as dry ice or liquid nitrogen, is used to pressurize and cool the enclosed space 100. A pressure relief valve can be provided in the enclosed space 100 to prevent the cooling medium from expanding due to heat and causing excessive pressure in the enclosed space 100.

[0102] In this embodiment, since the temperature and pressure in the fiber generating container 1 are relatively high, in order to balance the internal and external pressures, it is placed in a closed space 100 whose pressure can be adjusted by a pressure regulating pipe 7; in order to quickly cool and discharge heat, a cooling medium can be transported into the closed space 100 using a cooling pipe 8.

[0103] In some embodiments of the present invention, testing the viscosity of the molten mixture includes: testing the viscosity of the molten mixture using an ultrasonic pulse echo method.

[0104] In some embodiments of the present invention, the voltage applied by the power supply 3 is 20-40 kV, the rotation speed of the rotating receiving roller 4 is 1500-5500 rpm, and the intervals between the metal tubes 21 are 2-5 cm.

[0105] In some embodiments of the present invention, the preset temperature is 900-1000° C., and the preset pressure is 22-30 MPa.

[0106] In this embodiment, the preset temperature is 900-1000°C. The addition of water not only reduces the viscosity of the molten mixture but also lowers its melting temperature. The preset pressure is within the range of 22-30 MPa, which can compress the water into a supercritical state and dissolve it in the molten mixture. If it is below 22 MPa, the water will not dissolve in the molten mixture. If it is above 30 MPa, the pressure is too high, and not only will the increased pressure not further improve the fluidity of the molten mixture, but it will actually reduce the fluidity.

[0107] In some embodiments of the present invention, the preset time is 1 to 3 hours.

[0108] In some embodiments of the present invention, the mass fraction of water in the mixture is 4-8%.

[0109] In this embodiment, if the water content is less than 4% by weight, the effect on viscosity and temperature is insignificant, and the silicon tetrahedron network cannot be fully disrupted, resulting in substandard viscosity and poor fiber quality. If the water content exceeds 8% by weight, the excessive water content will produce excessive volatiles during the jetting process, causing jet discontinuity.

[0110] In some embodiments of the present invention, the conductive agent includes sodium oxide and / or potassium oxide, and the mass fraction of the conductive agent in the mixture is 0.1-0.2%.

[0111] In this embodiment, if the mass fraction of the conductive agent is less than 0.1%, the conductivity of the molten mixture is reduced and a good Taylor cone cannot be generated; if the mass fraction of the conductive agent is greater than 0.2%, the quality of the fiber of the molten mixture is reduced;

[0112] An embodiment of the present invention further provides an inorganic fiber prepared according to any of the above methods.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for preparing inorganic materials by separation and carbon removal of vaporized slag, characterized in that: include: The vaporized slag is sorted to obtain vaporized slag groups with different particle size ranges; Placing different vaporized slag groups in a hot air sorting device; wherein the hot air sorting device includes multiple sorting units, each of which includes a silo and a deposition silo located below the silo, the multiple silos are respectively used to hold different vaporized slag groups, the silos are provided with strip-shaped connecting holes at the bottom, the connecting holes connecting the silos and the deposition silos, and each deposition silo is penetrated by a gas pipeline, the length of the strip-shaped gas outlet of the gas pipeline matching the length of the connecting hole; The gas pipeline is used to output high-temperature gas into the deposition chamber, so that the powder falling into the communicating hole is heated and decarbonized under the action of the high-temperature gas, and obtains an initial velocity under the action of the gas force, so that particles with different densities eventually fall into different areas at the bottom of the deposition chamber, and primary powders with different main components are collected at different positions at the bottom of each deposition chamber, and the main components in the primary powders are purified to obtain purified powders; Powder is weighed from the purified powder according to a preset ratio, and the mixture is evenly mixed to prepare an inorganic material.

2. The method according to claim 1, characterized in that Before the high-temperature gas is outputted into the deposition chamber by using the gas pipeline, the method further includes: The flow rate of the high-temperature gas output from the gas pipeline is determined according to the particle size range of the particles in the silo.

3. The method according to claim 1, characterized in that Multiple sorting units are stacked, and the height of the silo is the same as that of the deposition silo. The silo is located above the deposition silo of the same sorting unit on the side where the gas pipeline is provided. The right-angle space formed by the silo and the deposition silo of one sorting unit is spliced with the deposition silo of another sorting unit, and the silos of the two adjacent sorting units are located in different directions.

4. The method according to claim 1, wherein The method of purifying the main components in the primary powder to obtain purified powder comprises: placing the primary powder, whose main component is calcium oxide, in water, and filtering to obtain a first filtrate and a first filter residue; The first filtrate is passed through with carbon dioxide to obtain calcium carbonate precipitation after sufficient reaction; The calcium carbonate precipitate is filtered out and calcined to obtain purified calcium oxide powder.

5. The method according to claim 4, characterized in that The method of purifying the main components in the primary powder to obtain purified powder comprises: placing the primary powder, whose main component is silicon dioxide, in water and filtering to obtain a second filter residue; The first filter residue and the second filter residue are added to concentrated hydrochloric acid, heated and fully dissolved to obtain silicon dioxide precipitate and a second filtrate, which are filtered to obtain purified silicon dioxide powder.

6. The method according to claim 5, characterized in that The method of purifying the main components in the primary powder to obtain purified powder comprises: placing the two groups of primary powders, each mainly composed of aluminum oxide and iron oxide, in water, and filtering to obtain a third filter residue; Adding the third filter residue to concentrated hydrochloric acid and heating to fully dissolve it to obtain a silicon dioxide precipitate and a third filtrate, which are filtered to obtain purified silicon dioxide powder; After adjusting the pH values of the third filtrate and the second filtrate to neutral, adding an excess amount of alkaline solution and reacting sufficiently to obtain iron hydroxide precipitate; After filtration, iron hydroxide precipitate and filtrate are obtained, and carbon dioxide is introduced into the filtrate to obtain aluminum hydroxide precipitate; After the aluminum hydroxide precipitate and the iron hydroxide precipitate are calcined respectively, purified aluminum oxide powder and purified iron oxide powder are obtained.

7. The method according to claim 1, characterized in that The step of weighing powder from the purified powder according to a preset ratio and mixing the powder evenly to prepare the inorganic material comprises: Weighing powder from the purified powder according to a preset ratio, and mixing the weighed powder, a conductive agent, and water to obtain a mixture; The mixture is placed in a fiber generation container, pressurized to a preset pressure in an atmosphere of protective gas, and then heated to a preset temperature to obtain a molten mixture; wherein the fiber generation container is connected to a plurality of injection units, each of the injection units includes a plurality of metal tubes connected to the interior of the fiber generation container, the metal tubes are made of a high-temperature alloy, the metal tubes in each injection unit are spaced uniformly, each metal tube is connected to a power supply, and a rotating receiving roller is provided at one end of the metal tube away from the fiber generation container, and the rotating receiving roller is grounded; Maintaining the temperature and pressure at the preset temperature for a preset time, and testing the viscosity of the molten mixture; After reaching the preset viscosity, the power supply is turned on to form a uniform electric field between the metal tube and the rotating receiving roller, and the rotating receiving roller rotates at the same time, so that the molten mixture is output from the metal tube to the rotating receiving roller and solidified to form a fibrous inorganic material.

8. The method according to claim 7, characterized in that The voltage applied by the power supply is 20-40 kV, the rotation speed of the rotating receiving roller is 1500-5500 rpm, and the intervals between the metal tubes are 2-5 cm.

9. The method according to claim 7, characterized in that The preset temperature is 900-1000° C., and the preset pressure is 22-30 MPa.

10. The method according to claim 7, characterized in that In the mixture, the mass fraction of water is 4 to 8%.

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