Manufacturing method of low-plasticity material sintered building block

Abstract

The invention discloses a manufacturing method of a low-plasticity material sintered building block, and belongs to the technical field of building block manufacturing methods.The manufacturing method comprises the steps that a first production raw material and a second production raw material are obtained, the first production raw material is waste residues obtained after iron, titanium and the like are selected from vanadium titano-magnetite, and the second production raw material is coal gangue; respectively crushing the first production raw material and the second production raw material, and mixing the crushed first production raw material and second production raw material to form a raw material; stirring the raw materials for the first time, and performing water injection treatment for the first time during the stirring for the first time; the raw materials are pressed into green bricks through high pressure; the green brick is sequentially subjected to a drying process, a preheating process, a sintering process and a cooling process to form the sintered building block. According to the manufacturing method designed by the invention, the sintered building block which is excellent in performance, energy-saving and environment-friendly is produced by utilizing the low-plasticity industrial solid waste, so that the problem of industrial solid waste treatment is solved, and the cyclic utilization of resources is also promoted.

Description

Technical Field

[0001] The invention belongs to the technical field of building block manufacturing methods, and in particular relates to a manufacturing method of a low-plasticity material sintered building block. Background Art

[0002] In the related technology, with the continuous development of industrial production, the generation of a large amount of industrial solid waste has become an environmental problem that needs to be solved urgently. Especially in the mining and coal industries, the accumulation of wastes such as ore dressing waste and coal gangue not only occupies a large amount of land resources, but also may pollute the surrounding environment. For example, ore dressing waste contains minerals and other chemical components that have not been completely extracted. If they are not treated, they may pollute the soil and groundwater. Coal gangue may also release harmful substances during the stacking process, and the land resources it occupies cannot be effectively utilized.

[0003] At present, the traditional methods for dealing with these industrial solid wastes mainly include stacking, landfilling, etc. These methods not only occupy a large amount of land resources, but also easily cause secondary pollution.

[0004] In the field of building materials, traditional brick production mainly relies on natural resources such as clay and shale, which not only consumes a large amount of natural resources, but also has problems such as high energy consumption and serious pollution in the production process. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a method for manufacturing a sintered building block made of low-plasticity material. According to the manufacturing method of the present invention, it is possible to produce a sintered building block with excellent performance, energy saving and environmental protection by using low-plasticity industrial solid waste, which not only solves the problem of industrial solid waste treatment, but also promotes the recycling of resources.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a method for manufacturing a sintered building block of a low-plastic material, comprising: obtaining a first production raw material and a second production raw material, wherein the first production raw material is waste slag after iron and titanium are extracted from vanadium-titanium magnetite, and the second production raw material is coal gangue; crushing the first production raw material and the second production raw material respectively, and mixing the crushed first production raw material and the second production raw material to form a raw material; stirring the raw materials for the first time, and performing a first water injection treatment on the raw materials during the first stirring; injecting the raw materials into a mold and pressing the raw materials into a brick blank by high pressure; the brick blank is sequentially subjected to a drying process, a preheating process, a sintering process and a cooling process to form a sintered building block.

[0008] Furthermore, the mass of the first production raw material is p1, and the mass of the second production raw material is p2, satisfying: 1≤p1 / p2≤6.

[0009] Further, the first production raw material includes: ore dressing tailings, the diameter of the ore dressing tailings is d1, satisfying: 0.074mm≤d1≤2mm; ore dressing tailings mud, the diameter of the ore dressing tailings mud is d2, satisfying: d2<0.074mm; wherein the diameter of the coal gangue is d3, satisfying: d3<3mm; wherein the mass of the ore dressing tailings is m1, the mass of the ore dressing tailings mud is m2, satisfying: 7≤m1 / m2≤11, and m1+m2=p1.

[0010] Furthermore, before injecting the raw materials into the mold, the method also includes: placing the raw materials into an aging bin for aging for 48h-72h; stirring the raw materials for a second time, and injecting water into the raw materials for a second time during the second stirring; wherein after the raw materials are stirred for the second time and injected with water for the second time, the moisture content of the raw materials is f1, satisfying: 5.0%≤f1≤8.0%.

[0011] Furthermore, the pressure of pressing the raw materials into the bricks is A, which satisfies: 1000 tons ≤ A ≤ 1600 tons, and the moisture content of the bricks is f2, which satisfies: 2.5% ≤ f2 ≤ 4.5%.

[0012] Furthermore, the moisture content of the brick blank after the drying process is f3, which satisfies: f3≤1.0%, and the ambient humidity of the brick blank is r, which satisfies: r≤3.0%.

[0013] Furthermore, in the preheating process, the bricks undergo multiple step-by-step heating, the temperature range of the step-by-step heating is T1, and satisfies: 50°C≤T1≤300°C, and the residence time of the bricks in each step-by-step heating is t1, and satisfies: 0.5h≤t1≤1h.

[0014] Furthermore, in the sintering process, the temperature for sintering the brick is T2, which satisfies: 900°C≤T2≤1100°C, and the residence time of the brick in the sintering process is t2, which satisfies: 1h≤t2≤2h.

[0015] Furthermore, it also includes: in the sintering process, using a fan device to perform heat exchange treatment on the bricks to ensure that the bricks are heated evenly during the sintering process.

[0016] Furthermore, the environment of the bricks in the preheating process is the first environment, and the environment of the bricks in the cooling process is the second environment, and the air in the second environment is introduced into the first environment.

[0017] The present invention is a little bit in that:

[0018] 1. This application utilizes the first production raw material (waste residue after iron and titanium are extracted from vanadium-titanium magnetite) and the second production raw material (coal gangue) to replace traditional brick-making materials (such as clay or shale) to manufacture blocks, thereby realizing the recycling of industrial solid waste, which can not only solve the problem of waste disposal, but also reduce dependence on traditional building materials. At the same time, the calorific value in coal gangue is used as an auxiliary energy source in the sintering process, which reduces the demand for external energy and helps to save energy and reduce emissions;

[0019] 2. The sintered blocks produced by the manufacturing method of the present application have high strength and durability, and the use of industrial solid waste instead of traditional building materials can reduce the consumption of natural resources, while reducing energy consumption and environmental pollution in the production process.

[0020] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0022] Figure 1 is a schematic diagram of the manufacturing method of the present invention;

[0023] Figure 2 It is a detailed schematic diagram of the manufacturing method of the present invention. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0025] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to one of ordinary skill in the art that these specific details are not necessarily employed to practice the present invention. In other instances, well-known structures, circuits, materials, or methods are not specifically described in order to avoid obscuring the present invention.

[0026] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] In the description of the present invention, it should be understood that the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the scope of protection of the present invention.

[0028] Embodiment 1:

[0029] like Figure 1-Figure 2 As shown, the present invention provides a method for manufacturing a sintered building block of a low-plasticity material, comprising: obtaining a first production raw material and a second production raw material, the first production raw material being waste slag after iron and titanium are extracted from vanadium-titanium magnetite, and the second production raw material being coal gangue.

[0030] The first production raw material is the waste slag after iron and titanium are extracted from vanadium-titanium magnetite, and the second production raw material is coal gangue, which is rock waste generated during coal mining and washing.

[0031] The first production raw material and the second production raw material are crushed separately, and the crushed first production raw material and the second production raw material are mixed to form a raw material.

[0032] The first production raw material (ore dressing waste residue) and the second production raw material (coal gangue) are crushed separately to obtain a particle size suitable for subsequent processing. It is worth mentioning that after the crushed first production raw material and the second production raw material are mixed to form the raw material, the raw material is further finely ground to further reduce the particle size of the raw material so that the raw material can be used in the subsequent process flow.

[0033] The raw materials are stirred for the first time, and during the first stirring, the raw materials are injected with water for the first time.

[0034] The crushed ore dressing waste and coal gangue are mixed in a certain proportion to form raw materials that can be used for sintering. During the mixing process, an appropriate amount of water is added to improve the plasticity and fluidity of the raw materials, which is convenient for subsequent molding operations. The first water injection treatment can improve the plasticity of the raw materials and make them easier to mold under high pressure.

[0035] The raw materials are poured into the mould and compacted into bricks using high pressure.

[0036] The raw materials are poured into a mold and compacted under high pressure to form a green brick. High pressure compaction increases the density of the green brick, ensuring that the sintered block has sufficient strength and stability.

[0037] The bricks are sequentially subjected to a drying process, a preheating process, a sintering process and a cooling process to form a sintered block.

[0038] The bricks are first dried to remove excess water, then preheated to gradually increase the temperature of the bricks, and then enter the sintering process to melt or semi-melt the particles in the bricks at high temperature to form a solid whole. Finally, the sintered blocks are cooled to room temperature to form the final sintered blocks. Through the four stages of drying, preheating, sintering and cooling, the particles in the raw materials can undergo chemical and physical changes at high temperatures to form a solid overall structure.

[0039] In the prior art, due to the poor plasticity of the raw materials of mineral processing waste slag and coal gangue, it is difficult to shape them. Other enterprises generally adopt the method of adding 15-45% clay or shale to improve the plasticity of the bricks, so as to manufacture blocks. There are a large number of the first production raw materials in Panzhihua and other places, and the first production raw materials are usually used as backfill land, resulting in extremely low development and utilization of the first production raw materials.

[0040] The present application can utilize the first production raw material to manufacture sintered blocks, so that the first production raw material can be reused, thereby realizing the resource and large-scale utilization of industrial solid waste.

[0041] In some embodiments, the present application utilizes a first production raw material and a second production raw material to replace traditional brick-making materials (such as clay or shale) to manufacture building blocks, thereby realizing the recycling of industrial solid waste, which can not only solve the waste disposal problem, but also reduce dependence on traditional building materials. At the same time, the calorific value of coal gangue is utilized as an auxiliary energy source during the sintering process, thereby reducing the demand for external energy and contributing to energy conservation and emission reduction.

[0042] It can be understood that by controlling the ratio of the first production raw material and the second production raw material and the production process, sintered blocks with excellent performance can be produced, and the sintered blocks have high strength and durability; and using industrial solid waste instead of traditional building materials can reduce the consumption of natural resources, while reducing energy consumption and environmental pollution in the production process; of course, the cost of industrial solid waste is relatively low, and using it to produce blocks can reduce production costs and improve economic benefits; at the same time, the above method helps to realize the resource utilization of industrial solid waste, reduce waste accumulation, and improve the recycling rate of resources.

[0043] Therefore, through the above-mentioned building block manufacturing method, the first raw material and the second raw material can be used through reasonable raw material ratio, water injection treatment, high-pressure molding and heat treatment process to produce sintered blocks with excellent performance, energy saving and environmental protection. It not only solves the problem of industrial solid waste treatment, but also promotes the recycling of resources, which is in line with the development trend of green building materials.

[0044] In some embodiments, the environment of the green bricks in the preheating process is a first environment, and the environment of the green bricks in the cooling process is a second environment, and the air in the second environment is introduced into the first environment.

[0045] It can be understood that using the waste heat in the cooling environment to assist the preheating process can significantly reduce the energy consumption required for preheating, which not only reduces production costs, but also helps to reduce energy consumption and environmental pollution; moreover, the above-mentioned settings can speed up the preheating speed and improve production efficiency. Shorter preheating time means that the sintering process can be entered faster, thereby improving overall production efficiency; at the same time, introducing air from the cooling environment helps to control the temperature distribution in the preheating environment, improve the controllability of the preheating process, improve the consistency of product quality, and reduce sintering defects caused by temperature fluctuations.

[0046] Embodiment 2:

[0047] In this embodiment, based on the first embodiment, the mass of the first production raw material is p1, the mass of the second production raw material is p2, and the following conditions are satisfied: 1≤p1 / p2≤6.

[0048] It is understandable that the first production raw material provides the necessary mineral components, while the second production raw material can provide a certain amount of heat for the sintering process. The present application achieves a balance between the physical and chemical properties (strength, durability and thermal insulation performance, etc.) of the sintered blocks by controlling 1≤p1 / p2≤6, making the sintered blocks of the present application more suitable for use in construction projects. It is worth noting that the mass proportion of the second production raw material (coal gangue) can be appropriately adjusted according to the calorific value of the coal gangue itself, that is, the greater the calorific value of the coal gangue, the smaller the mass proportion of the coal gangue can be, and the smaller the calorific value of the coal gangue, the greater the mass proportion of the coal gangue can be.

[0049] It is worth mentioning that when p1 / p2>6, that is, when the first production raw material is excessive, the formability and sintering effect of the sintered block are poor, and when p1 / p2<1, that is, when the second production raw material is excessive, the stability of the sintered block is poor.

[0050] According to some embodiments of the present invention, the first production raw material includes: mineral processing tailings and mineral processing tailings mud, the diameter of the mineral processing tailings is d1, satisfying: 0.074mm≤d1≤2mm, the diameter of the mineral processing tailings mud is d2, satisfying: d2<0.074mm; the diameter of the coal gangue is d3, satisfying: d3<3mm; the mass of the mineral processing tailings is m1, the mass of the mineral processing tailings mud is m2, satisfying: 7≤m1 / m2≤11, and m1+m2=p1.

[0051] In some embodiments, the ore dressing tailings are fine-grained solid waste with a particle size between 0.074 mm and 2 mm, the ore dressing tailings are fine-grained solid waste with a particle size less than 0.074 mm, and the coal gangue is crushed and finely ground into fine-grained solid waste with a particle size less than 3 mm.

[0052] By controlling the particle size of mineral processing tailings, mineral processing mud and coal gangue, the physical properties of sintered blocks, such as strength, density and porosity, can be better controlled; and the distribution of particles of different particle sizes in the mixture will affect the formability and sintering effect of the final product. The larger particle size of mineral processing tailings can provide better skeleton support, while the smaller particle size of mineral processing mud can fill the gaps and improve the density of the material; at the same time, the appropriate particle size distribution helps to improve the fluidity of the mixture, making it easier to form uniform and consistent bricks during the pressing process.

[0053] Therefore, by controlling the proportion of particles of different particle sizes in the raw materials, the physical properties of the sintered blocks can be optimized, so that the sintered blocks have better strength and durability. Moreover, the appropriate particle size distribution helps to improve the molding quality of the bricks and reduce the defects of the bricks during the pressing process. At the same time, by precisely controlling the particle size, the sintering process can be optimized, energy consumption can be reduced, the production cost of the sintered blocks can be reduced, and the impact on the environment can be reduced.

[0054] It can be understood that by controlling the mass ratio between mineral processing tailings and mineral processing mud to meet 7≤m1 / m2≤11, the physical properties of the sintered blocks can be improved, that is, the strength, density, porosity, etc. of the sintered blocks can be optimized, and at the same time it helps to improve the molding properties of the mixture, making it easier to form uniform and consistent bricks during the pressing process.

[0055] In some embodiments, assuming that the total mass of the ore dressing waste p1 is 100 kg, according to the requirement of 7≤m1 / m2≤11, the following example calculation can be performed:

[0056] If m1 / m2=7, then m1=87.5kg, m2=12.5kg.

[0057] If m1 / m2=11, then m1≈91.67kg, m2≈8.33kg.

[0058] Within this range, the specific ratio of mineral processing tailings and mineral processing tailings mud can be adjusted according to actual needs to achieve optimal performance and cost-effectiveness.

[0059] Embodiment three:

[0060] Based on the first embodiment, this embodiment further includes: placing the raw materials into an aging bin for aging for 48 hours to 72 hours before injecting the raw materials into the mold.

[0061] The raw materials are placed in the aging bin for aging treatment for 48 to 72 hours, in order to evenly distribute the moisture in the raw materials and improve their plasticity and forming properties. Aging treatment can improve the plasticity of the raw materials, making them easier to compact in the subsequent high-pressure forming process, reducing voids, and increasing the density and strength of the bricks. Moreover, during the aging process, the moisture in the raw materials is evenly distributed, which helps to improve the bonding force between particles.

[0062] The raw materials are stirred for a second time, and water is injected into the raw materials for a second time during the second stirring; wherein after the raw materials are stirred for the second time and injected with water for the second time, the moisture content of the raw materials is f1, which satisfies: 5.0%≤f1≤8.0%.

[0063] After aging, the raw materials are stirred for the second time, and during the second stirring, the raw materials are injected with water for the second time to further adjust the plasticity and fluidity of the raw materials. After the second stirring and water injection, the moisture content f1 of the raw materials should meet 5.0%≤f1≤8.0%. The second stirring can further even out the ingredients in the raw materials to ensure that all particles can be evenly distributed, and the second water injection can adjust the moisture content of the raw materials so that the raw materials reach the best plastic state for easy molding.

[0064] It is worth noting that the moisture content of the raw materials at this time is controlled between 5.0% and 8.0%, which can not only ensure that the raw materials have good plasticity, but also prevent defects in the formed bricks during the sintering process due to excessive moisture.

[0065] It can be understood that through aging treatment and secondary mixing and water injection, the molding quality of raw materials can be significantly improved, ensuring that the bricks can form a uniform and consistent structure under high pressure, and a reasonable moisture content helps to improve the strength and stability of the sintered blocks, so that the sintered blocks can show better performance in practical applications.

[0066] Of course, by optimizing the moisture content, the energy consumption in the sintering process can be reduced, the production cost of sintered blocks can be reduced, and the impact on the environment can be reduced. At the same time, by controlling the moisture content, the utilization efficiency of raw materials can be improved and waste in the production process can be reduced.

[0067] According to some embodiments of the present invention, the pressure of pressing the raw materials into bricks is A, which satisfies: 1000 tons ≤ A ≤ 1600 tons, and the moisture content of the bricks is f2, which satisfies: 2.5% ≤ f2 ≤ 4.5%.

[0068] In some embodiments, by setting a higher pressing pressure (1000 tons ≤ A ≤ 1600 tons), it can be ensured that the bricks have a higher density and strength during the molding process, and the higher pressure helps to reduce the voids in the bricks and improve the density and stability of the final product.

[0069] Controlling the moisture content of the bricks after forming between 2.5% and 4.5% can ensure that the bricks are not prone to cracks, shrinkage, deformation or other defects during the drying process. The appropriate moisture content helps to release water evenly during the drying process and prevent structural problems caused by uneven evaporation of water.

[0070] It is worth mentioning that when A>1600 tons, the pressure is too high, which will cause the bricks to be too tight, resulting in no air inside the bricks, making it difficult to burn through; when A<1000 tons, the pressure is too low, which will lead to poor brick forming effect or even failure to form.

[0071] Embodiment 4:

[0072] In this embodiment, based on the first embodiment, the moisture content of the brick after the drying process is f3, which satisfies: f3≤1.0%, and the ambient humidity of the brick is r, which satisfies: r≤3.0%.

[0073] It is understandable that the purpose of the drying process is to remove excess moisture from the green bricks to ensure that the green bricks will not have structural defects due to uneven evaporation of moisture during the subsequent sintering process. And by controlling the moisture content f3 after drying to ≤1.0%, it can be ensured that the green bricks will not have cracks or other defects due to excessive moisture during the sintering process.

[0074] During the drying process, controlling the ambient humidity r≤3.0% can further ensure that the moisture in the bricks can be removed evenly. Ambient humidity r≤3.0% helps to improve drying efficiency, reduce residual moisture in the bricks, and thus improve the quality of the final product.

[0075] At the same time, controlling the moisture content and ambient humidity can reduce energy consumption during the sintering process, reduce production costs, and reduce unnecessary water evaporation, thereby improving sintering efficiency and reducing energy consumption.

[0076] Of course, reasonable drying conditions can help improve the stability of the process and ensure consistent product quality for each batch. A low humidity environment can reduce the impact of external factors on the drying process and improve the controllability of the process.

[0077] Embodiment five:

[0078] In this embodiment, based on the fourth embodiment, in the preheating process, the bricks undergo multiple step-by-step heating, the temperature range of the step-by-step heating is T1, and it satisfies: 50℃≤T1≤300℃, the residence time of the bricks in each step-by-step heating is t1, and it satisfies: 0.5h≤t1≤1h.

[0079] In some embodiments, the temperature of the green brick can be gradually increased by step-by-step heating, so that the green brick can reach a uniform preheating state before sintering, which helps to reduce the temperature gradient inside the green brick and prevent stress concentration and cracking caused by rapid temperature changes.

[0080] Controlling the dwell time after each step heating can ensure that the bricks have enough time to achieve uniform temperature distribution in each temperature range, which helps to improve the uniformity of the bricks and reduce defects in the sintering process.

[0081] Therefore, through step-by-step heating, it is possible to ensure that the bricks reach a uniform preheating state before sintering, reduce cracking and deformation during the sintering process, and control the residence time after each step-by-step heating, which helps to improve the uniformity of the bricks and reduce sintering defects.

[0082] Of course, by controlling the temperature range of the step-by-step heating to T1, satisfying: 50℃≤T1≤300℃, and the residence time of the bricks in each step-by-step heating to t1, satisfying: 0.5h≤t1≤1h, the energy consumption in the sintering process can be reduced, the production cost can be reduced, and the adverse effects of sudden temperature changes on the bricks can be reduced, the sintering efficiency can be improved, and at the same time the stability of the preheating process can be improved to ensure consistent product quality for each batch.

[0083] According to some embodiments of the present invention, in the sintering process, the temperature of the sintered brick is T2, which satisfies: 900°C≤T2≤1100°C, and the residence time of the brick in the sintering process is t2, which satisfies: 1h≤t2≤2h.

[0084] In some embodiments, by controlling the sintering temperature between 900° C. and 1100° C., it is possible to ensure that the particles in the green brick are in a molten or semi-molten state, forming a strong overall structure and helping to improve the strength and durability of the sintered blocks.

[0085] Controlling the residence time t2 of the brick at the sintering temperature between 1 hour and 2 hours can ensure that the particles are more firmly bonded, reduce defects that may occur during the sintering process, help improve the sintering efficiency, and ensure that the brick has sufficient reaction time at high temperature.

[0086] By controlling the sintering temperature (900℃≤T2≤1100℃) and residence time (1h≤t2≤2h), it can be ensured that the low-plasticity material sintered blocks achieve ideal performance during the sintering process, which not only improves the quality and stability of the product, but also reduces the production cost.

[0087] According to some embodiments of the present invention, the manufacturing method further comprises: in the sintering process, using a fan device to perform heat exchange treatment on the bricks to ensure that the bricks are evenly heated during the sintering process. It is understandable that the flow of hot air can be promoted by delivering air or sucking air into the sintering furnace through the fan device, so that the surface and the interior of the bricks can be evenly heated, avoiding sintering defects caused by local overheating or uneven heating.

[0088] Of course, the heat exchange treatment of the fan device can improve the temperature distribution in the sintering furnace, reduce the temperature gradient, ensure that the bricks complete the sintering process at a constant temperature, and improve the quality and consistency of the sintered blocks. Moreover, uniform heating can reduce unnecessary energy consumption, improve sintering efficiency, reduce energy waste caused by local overheating, and reduce production costs.

[0089] Finally, it should be noted that the above preferred 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 through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A method for manufacturing a low-plasticity material sintered block, characterized in that: include: Obtaining a first production raw material and a second production raw material, wherein the first production raw material is waste residue after iron and titanium are extracted from vanadium-titanium magnetite, and the second production raw material is coal gangue; crushing the first production raw material and the second production raw material respectively, and mixing the crushed first production raw material and the second production raw material to form a raw material; Stirring the raw materials for the first time, and injecting water into the raw materials for the first time during the first stirring; Injecting the raw materials into a mold and pressing the raw materials into a brick using high pressure; The bricks are sequentially subjected to a drying process, a preheating process, a sintering process and a cooling process to form a sintered building block.

2. The method for manufacturing a low-plasticity material sintered building block according to claim 1, characterized in that: The mass of the first production raw material is p1, and the mass of the second production raw material is p2, satisfying: 1≤p1 / p2≤6.

3. The method for manufacturing a low-plasticity material sintered building block according to claim 2, characterized in that: The first production raw material includes: Ore dressing tailings, wherein the diameter of the ore dressing tailings is d1, satisfying: 0.074mm≤d1≤2mm; Ore dressing tailings, wherein the diameter of the ore dressing tailings is d2, satisfying: d2<0.074mm; wherein The diameter of the coal gangue is d3, which satisfies: d3<3mm; The mass of the ore dressing tailings is m1, and the mass of the ore dressing tailings is m2, which satisfies: 7≤m1 / m2≤11, and m1+m2=p1.

4. The method for manufacturing a low-plasticity material sintered building block according to claim 1, characterized in that: Before injecting the raw material into the mold, the method further comprises: The raw materials are placed in an aging bin for 48 hours to 72 hours; The raw materials are stirred for a second time, and water is injected into the raw materials for a second time during the second stirring; wherein After the raw materials are stirred twice and injected with water twice, the moisture content of the raw materials is f1, which satisfies: 5.0%≤f1≤8.0%.

5. The method for manufacturing a low-plasticity material sintered building block according to claim 4, characterized in that: The pressure of pressing the raw materials into the bricks is A, which satisfies: 1000 tons ≤ A ≤ 1600 tons; the moisture content of the bricks is f2, which satisfies: 2.5% ≤ f2 ≤ 4.5%.

6. The method for manufacturing a low-plasticity material sintered building block according to claim 1, characterized in that: The moisture content of the brick after the drying process is f3, which satisfies: f3≤1.0%, and the ambient humidity of the brick is r, which satisfies: r≤3.0%.

7. The method for manufacturing a low-plasticity material sintered building block according to claim 6, characterized in that: In the preheating process, the bricks are subjected to multiple step-by-step heating, the temperature range of the step-by-step heating is T1, and satisfies: 50°C≤T1≤300°C, and the residence time of the bricks in each step-by-step heating is t1, and satisfies: 0.5h≤t1≤1h.

8. The method for manufacturing a low-plasticity material sintered building block according to claim 7, characterized in that: In the sintering process, the temperature for sintering the green brick is T2, which satisfies: 900°C≤T2≤1100°C, and the residence time of the green brick in the sintering process is t2, which satisfies: 1h≤t2≤2h.

9. The method for manufacturing a low-plasticity material sintered building block according to claim 8, characterized in that: Also includes: In the sintering process, a fan device is used to perform heat exchange treatment on the bricks to ensure that the bricks are heated evenly during the sintering process.

10. The method for manufacturing a low-plasticity material sintered building block according to claim 1, characterized in that: The environment of the bricks in the preheating process is the first environment, and the environment of the bricks in the cooling process is the second environment, and the air in the second environment is introduced into the first environment.

Images