Slurry, preparation method thereof and application of slurry in preparation method of thermal insulation material and sodium chloride
By mixing zirconium silicon slag and red mud with a suspension agent and autoclaving treatment, a slurry with uniformity and stability was prepared, which solved the problem of difficulty in comprehensive utilization of zirconium silicon slag and red mud, and achieved an increase in resource utilization and a reduction in production costs.
Patent Information
- Application Number
- CN202411859511.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-03-25
AI Technical Summary
At this stage, the lack of comprehensive utilization methods for zirconium silicon slag and red mud makes it difficult to effectively utilize these industrial wastes, affecting resource utilization and production costs.
A slurry with a raw material including zirconium silicon slag and red mud is provided, and a slurry with uniformity and stability is prepared by mixing it with a suspension agent in water and autoclaving.
Through this method, the comprehensive utilization of zirconium silicon slag and red mud is achieved, which improves resource utilization, reduces waste treatment costs, and reduces raw material costs.
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Figure CN119683653A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of industrial waste recycling, and in particular to a slurry and a preparation method thereof, as well as an application of the slurry in a preparation method of a thermal insulation material and sodium chloride. Background Art
[0002] Red mud is an industrial waste generated during the industrial preparation of alumina. Every ton of alumina produced will produce 0.8 to 1.5 tons of red mud. However, due to the high alkalinity and fine particle size of red mud, its large-scale comprehensive utilization is difficult. Zirconium-silicon slag is an industrial waste generated during the industrial preparation of zirconium dioxide using zircon as raw material. With the increase in the output of zirconium dioxide and alumina, the output of zirconium-silicon slag and red mud is also increasing. However, at present, there is no method for the comprehensive utilization of zirconium-silicon slag and red mud, and they are often discarded, which is not conducive to improving resource utilization and reducing production costs. Summary of the invention
[0003] In view of the above problems, the present application is proposed. The present application provides a slurry and a preparation method thereof, and an application of the slurry in a preparation method of a thermal insulation material and sodium chloride.
[0004] According to one aspect of the present application, a slurry is provided, wherein the raw materials of the slurry include: zircon-silicon slag and red mud; the zircon-silicon slag is waste generated by preparing zirconium dioxide using zircon, and the red mud is waste generated by preparing alumina, the solid content of the zircon-silicon slag is 19% to 20%, the pH of the zircon-silicon slag is less than 1, and the mass ratio of the zircon-silicon slag to the red mud is (1 to 2):1.
[0005] Compared with the prior art, the raw materials of the slurry provided in the present application include zirconium silicon slag and red mud. Both of these substances are industrial wastes. Their comprehensive utilization is conducive to improving resource utilization and reducing the cost of waste treatment, thereby solving the waste discharge and pollution problems of related enterprises. On this basis, the present application limits the solid content of zirconium silicon slag to 19% to 20%, which helps to maintain the uniformity and stability of the slurry. If the solid content is higher than 20%, it may cause the solid particles to settle faster and cause the slurry to stratify. In addition, the present application also limits the mass ratio of zirconium silicon slag to red mud to (1 to 2): 1. Within this ratio range, the particles of zirconium silicon slag can be filled with the particles of red mud to form a tighter stacking structure, reduce porosity, and make the slurry more dense. At the same time, within the above-mentioned ratio range, the fluidity of the slurry can be improved, and the difficulty of subsequent processing due to the excessive viscosity of the slurry can be reduced.
[0006] According to another aspect of the present application, a method for preparing the above slurry is provided, comprising:
[0007] Mixing zirconium-silicon slag, red mud and a suspending agent in water to obtain a slurry intermediate;
[0008] The slurry intermediate is subjected to autoclave treatment to obtain a slurry.
[0009] Compared with the prior art, the preparation method of the slurry provided in the present application includes mixing zirconium silicon slag, red mud and a suspending agent in water to obtain a slurry intermediate. Among them, zirconium silicon slag is a waste produced by preparing zirconium dioxide using zircon, and after dissolving in water, it will at least exist in the slurry intermediate in the form of hydrogen ions, chloride ions, silicate ions and amorphous silicon dioxide. Red mud is a waste produced by preparing alumina, and after dissolving in water, it will at least exist in the slurry intermediate in the form of sodium ions, hydroxide ions, aluminum ions and calcium ions. Under the action of gravity, zirconium silicon slag and red mud will gradually settle and stratify in water. The suspending agent enables zirconium silicon slag and red mud to be evenly dispersed in water through steric hindrance and charge repulsion, thereby maintaining the stability of the slurry. Even in a static state, it can prevent the slurry from showing obvious stratification, ensuring that the slurry maintains a uniform mixing state for a long time. Then, the slurry intermediate is autoclaved to obtain a slurry. In this process, the reaction speed of the acid-base neutralization reaction between the components in the slurry intermediate can be significantly accelerated, the production cycle can be shortened, and the production efficiency can be improved. At the same time, when the water is gradually removed in the process, the zirconium-silicon slag and red mud will not quickly aggregate and redistribute due to the loss of water. Because the suspending agent can still play a role between the particles, the mixing state of the zirconium-silicon slag and red mud after dehydration can still remain relatively uniform, avoiding the local enrichment of zirconium-silicon slag or red mud.
[0010] It can be seen that the preparation method of the slurry provided in this application is relatively simple, and can realize the comprehensive utilization of zirconium silicon slag and red mud, thereby improving resource utilization and reducing the cost of waste treatment. Moreover, compared with using new, high-purity raw materials to make slurry, using these wastes can greatly reduce the cost of raw materials. Therefore, when the slurry is put into large-scale industrial production, the production cost can be effectively reduced.
[0011] According to another aspect of the present application, there is provided a use of the above-mentioned slurry and / or the slurry prepared by the above-mentioned method for preparing the slurry in a method for preparing a thermal insulation material.
[0012] According to another aspect of the present application, there is provided a use of the above-mentioned slurry and / or the slurry prepared by the above-mentioned method for preparing the slurry in a method for preparing sodium chloride.
[0013] Compared with the prior art, the beneficial effects of the slurry and / or the slurry preparation method provided in the present application in the application of the slurry prepared in the thermal insulation material and the preparation method of sodium chloride are the same as the beneficial effects of the above-mentioned slurry and its preparation method, which will not be repeated here.
[0014] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.
[0016] Figure 1 A flow chart showing a method for preparing a slurry according to an embodiment of the present application is shown;
[0017] Figure 2 A flow chart showing a method for preparing a thermal insulation material according to an embodiment of the present application is shown;
[0018] Figure 3 A flow chart of a method for preparing sodium chloride according to an embodiment of the present application is shown. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical solution and advantages of the present application more obvious, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described here.
[0020] Red mud is an industrial waste generated during the industrial preparation of alumina. Its pH value is usually between 10 and 13, which is strongly alkaline. During the comprehensive utilization process, the strong alkalinity will corrode the equipment and increase the equipment maintenance cost. In addition, the particles of red mud are usually very fine, and the particle size is mostly at the micron level. The fine particles make it easy for red mud to generate dust during the treatment process, causing environmental pollution. In addition, due to factors such as surface charge, red mud is prone to agglomeration, making it difficult to make large-scale comprehensive utilization. Zirconium-silicon slag is an industrial waste produced by the preparation of zirconium dioxide using zircon as raw material in industry. At present, there is no method for the comprehensive utilization of zirconium-silicon slag and red mud, and they are often discarded, which is not conducive to improving resource utilization and reducing production costs.
[0021] In view of the above problems, the present application provides a slurry, which includes zirconium silicon slag and red mud; wherein the zirconium silicon slag is waste produced by preparing zirconium dioxide using zircon, and the red mud is waste produced by preparing alumina, wherein the solid content of the zirconium silicon slag is 19% to 20%, which helps to maintain the uniformity and stability of the slurry. If the solid content is higher than 20%, it may cause the solid particles to settle faster, causing the slurry to stratify. In addition, the embodiment of the present application also limits the mass ratio of zirconium silicon slag to red mud to (1 to 2): 1. Within this ratio range, the particles of zirconium silicon slag can be filled with the particles of red mud to form a tighter stacking structure, reduce porosity, and make the slurry more compact. At the same time, within the above ratio range, the fluidity of the slurry can be improved, and the difficulty of subsequent processing due to the excessive viscosity of the slurry can be reduced. It is worth noting that compared with using new, high-purity raw materials to make slurry, using these wastes can greatly reduce the cost of raw materials. Therefore, when the slurry is put into large-scale industrial production, the production cost can be effectively reduced.
[0022] In an optional manner, the raw materials of the slurry in the embodiment of the present application also include a suspending agent, the mass of which accounts for 0.5% to 1% of the total mass of the zirconium-silicon slag and red mud. When the suspending agent within the above parameter range is adsorbed on the surface of the zirconium-silicon slag and red mud, it will increase the steric hindrance between the two. At the same time, the suspending agent can also change the charge properties of the surface of the zirconium-silicon slag and red mud, so that the two carry the same charge, thereby preventing the aggregation and sedimentation of the zirconium-silicon slag and red mud.
[0023] Illustratively, the suspending agent in the embodiments of the present application may include one or more of bentonite, magnesium aluminum silicate, sodium carboxymethyl cellulose and polyvinyl alcohol.
[0024] The present application also provides a method for preparing the above-mentioned slurry, which is relatively simple and can achieve the comprehensive utilization of zirconium-silicon slag and red mud, thereby improving resource utilization and reducing waste treatment costs. Figure 1 The flowchart of the method for preparing the slurry of the embodiment of the present application is shown. Figure 1 As shown, the preparation method comprises:
[0025] Step 101: Mix zirconium-silicon slag, red mud and a suspending agent in water to obtain a slurry intermediate.
[0026] Exemplarily, the zirconium silicon slag and red mud within the above-mentioned mass ratio range can be mixed first, and then water is added to stir them so that the soluble matter of the zirconium silicon slag and the soluble matter of the red mud are fully dissolved in the water to form a slurry intermediate. Among them, the zirconium silicon slag is a waste produced by preparing zirconium dioxide using zircon, and after dissolving in water, it will at least exist in the slurry intermediate in the form of hydrogen ions, chloride ions, silicate ions and amorphous silicon dioxide. Red mud is a waste produced by preparing alumina, and after dissolving in water, it will at least exist in the slurry intermediate in the form of sodium ions, hydroxide ions, aluminum ions and calcium ions. At the same time, a suspending agent within the above-mentioned ratio range is added to the mixed system of zirconium silicon slag and red mud, so that the zirconium silicon slag and red mud can be evenly dispersed in the water to maintain the stability of the slurry. Even in a static state, it can prevent the slurry from obvious stratification, ensuring that the slurry remains in a uniform mixed state for a long time.
[0027] It should be understood that the amount of water used in this step, as well as the stirring speed and stirring time can be adjusted according to actual conditions, as long as the soluble matter of zirconium silicon slag and the soluble matter of red mud can be fully dissolved in water, and there is no limitation here.
[0028] Step 102: autoclave the slurry intermediate to obtain slurry.
[0029] Exemplarily, the slurry intermediate can be placed in an autoclave for autoclave treatment, wherein the slurry intermediate can be stirred while the autoclave treatment is being carried out, which can not only distribute the heat more evenly throughout the slurry intermediate, but also make the components in the slurry intermediate fully contact each other, improve the efficiency and uniformity of the reaction, and make the final slurry more uniform. On this basis, the embodiment of the present application limits the temperature of the autoclave treatment to 90°C to 110°C, and the pressure of the autoclave treatment is 0.07Mpa to 0.143Mpa. Within the above parameter range, it can not only further accelerate the reaction speed of the acid-base neutralization reaction between the components in the slurry intermediate, shorten the production cycle, improve production efficiency, but also facilitate the formation of a uniform slurry. It can be seen that the preparation method of the slurry provided in the present application is relatively simple, and can realize the comprehensive utilization of zirconium silicon slag and red mud, thereby improving resource utilization and reducing the cost of waste treatment. Not only that, compared with using new, higher purity raw materials to make slurry, using these wastes can greatly reduce the cost of raw materials. Therefore, when the slurry is put into large-scale industrial production, the production cost can be effectively reduced. When the temperature of the autoclave treatment is greater than 110°C and the pressure of the autoclave treatment is greater than 0.143Mpa, the cost will increase and the reaction efficiency will not be further improved. In addition, when the temperature of the autoclave treatment is less than 90°C and the pressure of the autoclave treatment is less than 0.1Mpa, the reaction efficiency will decrease, the reaction time will be prolonged, and the alkaline substances in the red mud cannot be completely removed.
[0030] The present application also provides an application of the above-mentioned slurry and / or the preparation method of the slurry in the preparation method of the thermal insulation material. In the traditional process, the raw materials for preparing the thermal insulation material include basalt and dolomite, and the raw materials are expensive. When the above-mentioned slurry is used to produce the thermal insulation material, the expensive raw materials can be replaced by waste, which is beneficial to improve resource utilization and reduce the production cost of the thermal insulation material.
[0031] Figure 2 The flowchart of the method for preparing the thermal insulation material of the embodiment of the present application is shown. Figure 2 As shown, the method includes:
[0032] Step 201: washing the slurry multiple times and obtaining a filter cake after filtering.
[0033] For example, in this step, the liquid part in the slurry can be squeezed out, the solid components are tightly aggregated, the solid content is increased, and a relatively dry filter cake is obtained. This is not only conducive to subsequent drying and high-temperature melting operations, but also can remove soluble impurities in the slurry, minimize the residue of soluble impurities on the filter cake, and reduce the probability of affecting the quality control of the thermal insulation material due to other ions mixed into the filter cake.
[0034] Step 202: drying, melting and centrifuging the filter cake to obtain heat-insulating material fibers.
[0035] For example, the filter cake after the filter press can be evenly fed into the sintering equipment through the feeding device of the kiln head, and the waste heat of the kiln head can be used to dry the filter cake that has just entered to reduce the heating energy consumption. At this time, some volatile impurities will also begin to volatilize, and the water in the filter cake will also evaporate rapidly to reduce the heating time of the subsequent melting treatment, which is conducive to reducing the production energy consumption of the thermal insulation material. Next, the dried filter cake is melted at 1400℃~1600℃ to obtain a magma melt. At this time, the melted filter cake can be centrifuged by a centrifugal device to obtain thermal insulation material fibers. Among them, the speed of the centrifugal treatment is greater than 7000r / min, which can ensure that the magma melt forms fibers under the stretching of centrifugal force. If the speed of the centrifugal treatment is less than or equal to 7000r / min, the centrifugal force is insufficient, and the flow and stretching of the melt are unstable. Part of the melt may be stretched into thinner fibers due to slightly larger local forces, while other parts form thicker fibers due to insufficient force. This non-uniformity will lead to inconsistent performance of the insulation material. During use, heat may be quickly transferred through the relatively large channels between the coarser fibers, reducing the insulation effect and also affecting the mechanical properties and appearance quality of the material. It should be understood that other parts of the sintering equipment besides the kiln head can also be used for drying, which is not limited here.
[0036] Step 203: performing a bonding process on the thermal insulation material fibers to obtain the thermal insulation material.
[0037] Exemplarily, the fibers of the thermal insulation material are subjected to a bonding treatment so that the thermal insulation materials are tightly bonded to each other, thereby improving the strength and stability of the thermal insulation material. Among them, the mass ratio of the additive used for the bonding treatment to the fibers of the thermal insulation material in the embodiment of the present application is 1: (10-15), and its source may include a combination of a binder and a hydrophobic agent or a binder with a hydrophobic effect. When the additive includes a binder with a hydrophobic effect, one or more of a silicone resin and a water-based epoxy resin may be selected. When the additive includes a binder and a hydrophobic agent, the mass ratio of the binder and the hydrophobic agent is 1000: (1.0-2.0), so that the probability of problems such as a decrease in fiber strength and failure of the binder due to water absorption of the thermal insulation material can be reduced in a humid environment or when there is rain erosion. It is understandable that when the fibers of the thermal insulation material are bonded using an additive, it is necessary to dilute it with a solvent, wherein the solvent includes one or more of toluene, xylene, acetone and water. The mass ratio of the additive to the solvent is 1:(3.0-5.0), and the mass ratio of the amount of the diluted additive applied to the thermal insulation material fiber to the thermal insulation material fiber is 1:(4-6).
[0038] Exemplarily, the method for preparing the thermal insulation material in the embodiment of the present application also includes: a post-processing step; the post-processing step includes: stretching and extrusion molding the thermal insulation material, and finally cutting and processing according to market demand for sale.
[0039] The present application also provides a method for preparing sodium chloride using the above-mentioned slurry and / or the method for preparing the slurry, which is beneficial to improving resource utilization and reducing the production cost of sodium chloride.
[0040] Figure 3 The flowchart of the method for preparing sodium chloride in the embodiment of the present application is shown. Figure 3 As shown, the method includes:
[0041] Step 301: washing the slurry multiple times and obtaining a filtrate after filtering.
[0042] For example, since the slurry contains chloride ions and sodium ions, when it is washed multiple times, the probability of chloride ions and sodium ions remaining in the solid part of the slurry can be reduced to the greatest extent, thereby improving resource utilization. When the amount of solvent used for washing treatment is large, the washing difficulty is low and the number of washing times is small; when the amount of solvent used for washing treatment is small, the washing difficulty is high and the number of washing times is large. Therefore, it can be adjusted according to actual needs and is not limited here.
[0043] Step 302: Concentrate the filtrate to obtain sodium chloride.
[0044] For example, the embodiment of the present application can evaporate the water in the filtrate by heating, the solution is gradually concentrated, and the concentration of sodium chloride is continuously increased. During the evaporation process, normal pressure evaporation or reduced pressure evaporation can be used. The advantage of reduced pressure evaporation is that it can be carried out at a lower temperature, avoiding chemical reactions of some impurities at high temperatures, and also reducing energy consumption.
[0045] In practical applications, the waste heat of the sintering equipment can also be used to heat, evaporate and concentrate the filtrate to precipitate sodium chloride, thereby reducing production costs.
[0046] In order to verify the effect of the slurry provided in the examples of the present application in the preparation of thermal insulation materials and sodium chloride, the examples of the present application are demonstrated by way of examples.
[0047] Embodiment 1
[0048] Step 1: After mixing the zirconium-silicon slag and red mud, add bentonite and deionized water 1 times the total mass of the zirconium-silicon slag and red mud for stirring to obtain a slurry intermediate. Among them, the solid content of the zirconium-silicon slag is 19.5%, the mass ratio of the zirconium-silicon slag to the red mud is 1:1, and the mass of the bentonite accounts for 0.5% of the total mass of the zirconium-silicon slag and red mud.
[0049] Step 2: Add the slurry intermediate into an autoclave at 100° C. and 0.1 MPa for 60 min to obtain a slurry.
[0050] Step 3: Wash the slurry twice and obtain the filtrate and filter cake after filtering.
[0051] Step 4: The filtrate is evaporated and concentrated at 100°C using the waste heat generated by the kiln to obtain sodium chloride. Then, the filter cake is evenly fed into the sintering equipment. The waste heat from the kiln head can dry the filter cake that has just entered. Then, the dried filter cake is calcined and melted at 1500°C for 240 minutes to obtain a magma melt. Then, the centrifugal treatment is carried out at a centrifugal speed of more than 8000r / min to obtain rock wool fibers. Finally, the rock wool fibers are bonded with silicone resin diluted with toluene to obtain rock wool. Among them, the mass ratio of toluene to silicone resin is 5:1, the ratio of silicone resin to rock wool fiber is 1:10, and the mass ratio of the amount of silicone resin diluted by toluene applied to the rock wool fiber to the rock wool fiber is 1:6.
[0052] Step 5: The rock wool is stretched, extruded and cut in sequence.
[0053] Embodiment 2
[0054] Step 1: After mixing zirconium silicon slag and red mud, add magnesium aluminum silicate and deionized water 1.2 times the total mass of zirconium silicon slag and red mud for stirring to obtain a slurry intermediate. Among them, the solid content of zirconium silicon slag is 19.5%, the mass ratio of zirconium silicon slag to red mud is 1.5:1, and the mass of magnesium aluminum silicate accounts for 0.8% of the total mass of zirconium silicon slag and red mud.
[0055] Step 2: Add the slurry intermediate into an autoclave at 110° C. and 0.143 MPa for autoclaving for 60 min to obtain a slurry.
[0056] Step 3: Wash the slurry twice and obtain the filtrate and filter cake after filtering.
[0057] Step 4: Heat the filtrate with waste heat, concentrate and evaporate it to obtain sodium chloride. Then, the filter cake is evenly fed into the sintering equipment. The waste heat from the kiln head can dry the filter cake that has just entered. Then, the dried filter cake is melted at 1500°C for 240 minutes to obtain a magma melt. Then, centrifugal treatment is carried out at a centrifugal speed of more than 8000r / min to obtain rock wool fibers. Finally, the rock wool fibers are bonded with silicone resin diluted with toluene to obtain rock wool. Among them, the mass ratio of toluene to silicone resin is 3:1, the ratio of silicone resin to rock wool fiber is 1:12, and the mass ratio of the amount of silicone resin diluted by toluene applied to the rock wool fiber to the rock wool fiber is 1:5.
[0058] Step 5: The rock wool is stretched, extruded and cut in sequence.
[0059] Embodiment 3
[0060] Step 1: After mixing the zirconium silicon slag and red mud, sodium carboxymethyl cellulose and deionized water 1.5 times the total mass of the zirconium silicon slag and red mud are added for stirring to obtain a slurry intermediate. Among them, the solid content of the zirconium silicon slag is 19.5%, the mass ratio of the zirconium silicon slag to the red mud is 7:3, and the mass of the sodium carboxymethyl cellulose accounts for 1% of the total mass of the zirconium silicon slag and red mud.
[0061] Step 2: Add the slurry intermediate into an autoclave at 90° C. and 0.07 MPa for 30 min to obtain a slurry.
[0062] Step 3: Wash the slurry twice and obtain the filtrate and filter cake after filtering.
[0063] Step 4: Use the waste heat of flue gas to evaporate and concentrate the filtrate to obtain sodium chloride. Then, the filter cake is evenly fed into the sintering equipment. The waste heat of the kiln head can dry the filter cake that has just entered. Then, the dried filter cake is melted at 1500°C for 240 minutes to obtain magma melt. Then, centrifugal treatment is carried out under the condition of a centrifugal speed of more than 8000r / min to obtain rock wool fiber. Finally, the rock wool fiber is bonded with water-based epoxy resin diluted with deionized water to obtain rock wool. Among them, the mass ratio of deionized water to water-based epoxy resin is 3.5:1, the ratio of water-based epoxy resin to rock wool fiber is 1:15, and the mass ratio of the amount of water-based epoxy resin diluted with deionized water applied to the rock wool fiber to the rock wool fiber is 1:4.
[0064] Step 5: The rock wool is stretched, extruded and cut in sequence.
[0065] The following table shows the performance test results of the rock wool prepared in Examples 1 to 3 and commercially available rock wool.
[0066] Table 1
[0067]
[0068] It can be seen that the performance of the rock wool prepared by the slurry provided in this application is similar to that of commercially available rock wool.
[0069] The above is only a specific implementation of the present application. Obviously, various modifications and combinations can be made without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are only exemplary illustrations of the present application as defined by the attached claims, and are deemed to have covered any and all modifications, changes, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include these changes and variations. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be covered within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.
[0070] It should also be noted that in the device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.
[0071] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.
[0072] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.
Claims
1. A slurry, characterized in that: The raw materials of the slurry include: zirconium-silicon slag and red mud; the zirconium-silicon slag is waste generated by preparing zirconium dioxide using zircon, and the red mud is waste generated by preparing alumina. The solid content of the zirconium-silicon slag is 19% to 20%, the pH of the zirconium-silicon slag is less than 1, and the mass ratio of the zirconium-silicon slag to the red mud is (1 to 2):
1.
2. The slurry according to claim 1, characterized in that The raw materials also include a suspending agent, the mass of which accounts for 0.5% to 1% of the total mass of the zirconium-silicon slag and the red mud.
3. A method for preparing the slurry according to claim 1 or 2, characterized in that: include: Mixing zirconium-silicon slag, red mud and a suspending agent in water to obtain a slurry intermediate; The slurry intermediate is subjected to autoclave treatment to obtain a slurry.
4. The method for preparing the slurry according to claim 3, characterized in that: The temperature of the autoclave treatment is 90° C. to 110° C., and the pressure of the autoclave treatment is 0.07 MPa to 0.143 MPa.
5. Use of a slurry prepared by the preparation method of the slurry according to claim 1 or 2 and / or the slurry according to claim 3 or 4 in a method for preparing a thermal insulation material.
6. The use according to claim 5, characterized in that The preparation method of the thermal insulation material comprises: The slurry is subjected to multiple washing treatments, and a filter cake is obtained after filtering; The filter cake is subjected to drying, melting and centrifugal treatment to obtain heat-insulating material fibers; The heat-insulating material fibers are subjected to a bonding process to obtain the heat-insulating material.
7. The use according to claim 6, characterized in that: The rotation speed of the centrifugal treatment is greater than 7000r / min.
8. The use according to claim 6 or 7, characterized in that: The preparation method of the thermal insulation material further comprises: a post-processing step; the post-processing step comprises: The heat-insulating material is subjected to extrusion molding and cutting processing.
9. The use according to claim 8, characterized in that: The additives used in the bonding process include a combination of a bonding agent and a water-repellent agent or a bonding agent with a water-repellent effect.
10. Use of the slurry according to claim 1 or 2 and / or the slurry according to claim 3 or 4 in a method for preparing sodium chloride.
11. The use according to claim 10, characterized in that The preparation method of the sodium chloride comprises: The slurry is subjected to multiple washing treatments, and a filtrate is obtained after filtering; The filtrate is concentrated to obtain sodium chloride.