Method for producing novel lightweight wall thermal insulation material by using industrial coal cinder
By pretreating and proportioning the industrial cinder, light particles with porous structures were prepared, which solved the problems of obsolete insulation materials in old communities and accumulation of industrial cinders, and achieved the effects of efficient insulation and low-cost production.
Patent Information
- Application Number
- CN202510028907.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2025-04-15
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The wall insulation materials in old communities are outdated, resulting in serious energy losses. At the same time, industrial cinder accumulation takes up land and pollutes the environment, and lacks effective methods of utilization.
By pretreatment, crushing and proportioning of industrial cinders, light particles with porous structures are prepared, and a new wall material that is both thermally insulated and heat-insulated is made through the molding process.
It realizes efficient insulation performance and low-cost production of new wall insulation materials, reduces the cost of renovation of old communities, and promotes the recycling of resources and environmental protection.
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of building materials, and in particular to a method for producing a novel lightweight wall thermal insulation material by utilizing industrial coal slag. Background Art
[0002] The renovation of old residential areas is a great feat that benefits both the country and the people. As the houses are built a long time ago, especially those built around 2000, they are gradually entering the "aging period". The insulation materials of many houses in old residential areas are very old and the energy loss is serious. Therefore, the demand for wall insulation materials is growing. As a common industrial waste, industrial coal slag not only occupies land, but also pollutes the environment when it is piled up in large quantities. How to effectively use industrial coal slag to prepare new lightweight wall insulation materials has become a hot topic in current research.
[0003] In response to this demand, the present invention has carried out in-depth exploration and practice. Through specific processing technology, industrial coal slag can be converted into a lightweight, high-strength and environmentally friendly new wall insulation material. This conversion process not only solves the problem of industrial waste disposal, but also provides high-quality building materials resources for the renovation of old residential areas. During the preparation process, the researchers first crushed and screened the industrial coal slag to remove impurities, and then changed its structure through subsequent processing steps to form lightweight particles with a porous structure. These particles are then scientifically proportioned and molded to finally make a wall material that is both heat-insulating and heat-insulating. Compared with traditional wall insulation materials, this new material not only has higher thermal insulation performance, but its porous structure can also effectively absorb and store heat, achieving the effect of warm in winter and cool in summer. In addition, since its raw materials come from industrial waste, the cost is relatively low, which is conducive to reducing the overall cost of renovation of old residential areas. Summary of the invention
[0004] The renovation of old residential areas is beneficial to the country and the people. The purpose of the present invention is to provide a method for producing a new type of lightweight wall insulation material using industrial coal slag, which can turn waste into treasure and produce a lightweight and environmentally friendly wall insulation material with good thermal insulation performance. It can help old residential areas to "repair" some old walls during renovation.
[0005] To achieve the above object, the present invention adopts the following technical solutions:
[0006] A method for producing a novel lightweight wall insulation material using industrial coal slag comprises the following steps:
[0007] S1. Coal slag pretreatment: Collect industrial coal slag, screen it, and remove large impurities and unburned coal particles;
[0008] S2, crushing coal slag: crushing the screened coal slag;
[0009] S3. Prepare lightweight wall insulation materials.
[0010] Preferably, in step S2, the particle size of the crushed coal slag is 10-50 microns.
[0011] Preferably, the steps of preparing lightweight wall insulation materials include: taking 40-60 parts of crushed coal slag, adding 20-30 parts of cement, 10-20 parts of lightweight aggregate, 5-10 parts of fiber material, 3-8 parts of foaming agent and an appropriate amount of water, and fully stirring and mixing the above materials to form a uniform mixed slurry.
[0012] Preferably, the lightweight aggregate is ceramsite or expanded perlite; the fiber material is glass fiber or polypropylene fiber; and the foaming agent is aluminum powder or hydrogen peroxide.
[0013] Preferably, the method further comprises molding and curing: injecting the mixed slurry into a mold, allowing it to stand for molding at room temperature and pressure for 2-4 hours, and then performing steam curing to fully develop the strength of the material, thereby finally obtaining a finished product of a new lightweight wall insulation material.
[0014] Preferably, the curing temperature is controlled at 60-80° C., and the curing time is 12-24 hours.
[0015] Further preferably, the lightweight wall insulation material in step S3 is foamed concrete, and the preparation steps are as follows: add coal slag and cement into a mixer according to a certain proportion, and first dry mix them evenly; then mix the pre-prepared foaming agent solution with water and add them into the mixer, and at the same time add a foam stabilizer, and continue stirring to form a uniform slurry; pour the stirred slurry into a mold, demold after natural curing for a certain period of time, and then perform standard curing to obtain a coal slag-based foamed concrete lightweight wall insulation material.
[0016] Further preferably, the lightweight wall insulation material in step S3 is a polystyrene particle composite insulation mortar, and the preparation steps are as follows: coal slag fine powder, cement, redispersible latex powder, cellulose ether and other additives are mixed with water to make an insulation mortar base material; then the polystyrene particles are added to the insulation mortar base material, and stirred evenly again to make the polystyrene particles evenly distributed in the mortar.
[0017] Further preferably, the lightweight wall insulation material in step S3 is a sintered insulation brick, and the preparation steps are as follows: industrial coal slag, clay, shale and a small amount of additives are mixed in a certain proportion, and an appropriate amount of water is added to stir evenly to make the raw materials have a certain plasticity; the mixed raw materials are placed in a mold for pressing and forming to form a brick blank, and then the brick blank is dried in a natural environment to a certain moisture content; the dried brick blank is placed in a tunnel kiln or a rotary kiln for sintering, and the sintering temperature and time are controlled. After sintering, it is cooled to obtain a coal slag sintered insulation brick.
[0018] Preferably, the additive is a flux.
[0019] Compared with the prior art, the present invention achieves the following technical effects:
[0020] The present invention discloses a method for producing a novel lightweight wall insulation material using industrial coal slag, which can turn waste into treasure and produce a lightweight and environmentally friendly wall insulation material with good thermal insulation performance, and help old residential areas to "repair" some old walls during renovation.
[0021] This invention undoubtedly provides strong technical support and material guarantee for the renovation of old residential areas. With the in-depth advancement of the renovation of old residential areas, this new lightweight wall insulation material has been widely used. It not only improves the living comfort of residents, but also promotes the recycling of resources and reduces environmental pollution. It can be said that this innovative practice not only promotes the upgrading of building materials, but also contributes to sustainable development. DETAILED DESCRIPTION
[0022] The following are specific embodiments of the present invention, which further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments; in the following description, specific details such as specific configurations are provided only to help fully understand the embodiments of the present invention. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention.
[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.
[0024] Example 1
[0025] (1) Slag pretreatment: Collect industrial slag, screen it, remove large impurities and unburned coal particles, and then crush the screened slag to a particle size of 10-50 microns.
[0026] (2) Mixing ingredients: Take 40-60 parts of crushed coal slag, add 20-30 parts of cement, 10-20 parts of lightweight aggregate, and fiber material.
[0027] 5-10 parts, 3-8 parts of foaming agent and appropriate amount of water. The lightweight aggregate is ceramsite or expanded perlite; the fiber material is glass fiber or polypropylene fiber; the foaming agent is aluminum powder or hydrogen peroxide. The above materials are fully stirred and mixed to form a uniform mixed slurry.
[0028] (3) Molding and curing: The mixed slurry is injected into the mold and allowed to stand at room temperature and pressure to form.
[0029] 2-4 hours, and then steam curing is carried out, the curing temperature is controlled at 60-80℃, and the curing time is 12-24 hours, so that the material strength can be fully developed, and finally a new type of lightweight wall insulation material is obtained.
[0030] Example 2 Foamed concrete method
[0031] (1) Raw material preparation: crush the industrial coal slag and sieve it to select coal slag particles with a suitable particle size range. Prepare raw materials such as cement, foaming agent, foam stabilizer, and water.
[0032] (2) Mixing and stirring: Add coal slag and cement into the mixer in a certain proportion and dry mix them evenly. Then mix the pre-prepared foaming agent solution with water and add it into the mixer. At the same time, add the foam stabilizer and continue stirring to form a uniform slurry.
[0033] (3) Forming and curing: Pour the stirred slurry into a mold, naturally cure it for a certain period of time, then demould it, and then perform standard curing to obtain a cinder-based foam concrete lightweight wall insulation material, whose thermal conductivity, compressive strength and other properties can be tested.
[0034] Example 3 Polystyrene particle composite thermal insulation mortar method
[0035] (1) Pretreatment: Grind and magnetically separate industrial coal slag to remove impurities and obtain relatively pure coal slag fine powder.
[0036] (2) Preparation of mortar: Mix coal slag powder, cement, redispersible latex powder, cellulose ether and other additives with water to prepare a thermal insulation mortar base material; then add polystyrene particles to the thermal insulation mortar base material and stir evenly again to make the polystyrene particles evenly distributed in the mortar.
[0037] (3) Performance test: The prepared polystyrene particle composite insulation mortar is applied to a standard test plate. After drying, its insulation performance (thermal conductivity), bonding strength, crack resistance and other indicators are tested to evaluate its feasibility as a lightweight wall insulation material.
[0038] Example 4 Sintered Insulation Brick Method
[0039] (1) Raw material proportioning and mixing: industrial coal slag, clay, shale and a small amount of additives (such as flux, etc.) are mixed in a certain proportion, and an appropriate amount of water is added to stir evenly to make the raw materials have a certain plasticity.
[0040] (2) Molding and drying: The mixed raw materials are placed in a mold and pressed into shape to make bricks, which are then dried in a natural environment to a certain moisture content.
[0041] (3) Sintering: Place the dried bricks into a tunnel kiln or a rotary kiln for sintering, and control the sintering temperature and time; after sintering, cool them to obtain coal slag sintered insulation bricks. Test their bulk density, compressive strength, thermal conductivity and other properties to determine whether they meet the requirements of lightweight wall insulation materials.
[0042] Those skilled in the art to which the present application belongs may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but they will not deviate from the inventive concept of the present application or exceed the scope defined by the attached claims.
Claims
1. A method for producing a new lightweight wall insulation material using industrial coal slag, characterized in that: The specific steps include: S1. Coal slag pretreatment: Collect industrial coal slag, screen it, and remove large impurities and unburned coal particles; S2, crushing coal slag: crushing the screened coal slag; S3. Prepare lightweight wall insulation materials.
2. The method for producing a novel lightweight wall insulation material using industrial coal slag according to claim 1, characterized in that: In the step S2, the particle size of the crushed coal slag is 10-50 microns.
3. The method for producing a novel lightweight wall insulation material using industrial coal slag according to claim 2, characterized in that: The steps of preparing lightweight wall insulation materials include: taking 40-60 parts of crushed coal slag, adding 20-30 parts of cement, 10-20 parts of lightweight aggregate, 5-10 parts of fiber material, 3-8 parts of foaming agent and appropriate amount of water by weight, and fully stirring and mixing the above materials to form a uniform mixed slurry.
4. The method for producing a novel lightweight wall insulation material using industrial coal slag according to claim 3, characterized in that: The lightweight aggregate is ceramsite or expanded perlite; the fiber material is glass fiber or polypropylene fiber; and the foaming agent is aluminum powder or hydrogen peroxide.
5. The method for producing a novel lightweight wall insulation material using industrial coal slag according to claim 4, characterized in that: It also includes molding and curing: injecting the mixed slurry into the mold, leaving it to form at room temperature and pressure for 2-4 hours, and then steam curing it to fully develop the material strength, and finally obtaining a new lightweight wall insulation material finished product.
6. The method for producing a novel lightweight wall insulation material using industrial coal slag according to claim 5, characterized in that: The curing temperature is 60-80° C., and the curing time is 12-24 hours.
7. The method for producing a novel lightweight wall insulation material using industrial coal slag according to claim 1, characterized in that: The lightweight wall insulation material in step S3 is foam concrete, and the preparation steps are as follows: Add coal slag and cement into the mixer in a certain proportion and dry-mix them evenly first; then mix the pre-prepared foaming agent solution with water and add it into the mixer, and add the foam stabilizer at the same time, and continue stirring to form a uniform slurry; pour the stirred slurry into a mold, demould after natural curing for a certain period of time, and then carry out standard curing to obtain a coal slag-based foam concrete lightweight wall insulation material.
8. The method for producing a novel lightweight wall insulation material using industrial coal slag according to claim 1, characterized in that: The lightweight wall insulation material in step S3 is a polystyrene particle composite insulation mortar, and the preparation steps are as follows: mixing coal slag fine powder, cement, redispersible latex powder, cellulose ether and other additives with water to prepare an insulation mortar base material; then adding polystyrene particles to the insulation mortar base material, stirring evenly again, so that the polystyrene particles are evenly distributed in the mortar.
9. The method for producing a novel lightweight wall insulation material using industrial coal slag according to claim 1, characterized in that: The lightweight wall insulation material in step S3 is a sintered insulation brick, and the preparation steps are as follows: industrial coal slag, clay, shale and a small amount of additives are mixed in a certain proportion, and an appropriate amount of water is added to stir evenly to make the raw materials have a certain plasticity; the mixed raw materials are placed in a mold for pressing and forming to form a brick blank, and then the brick blank is dried in a natural environment to a certain moisture content; the dried brick blank is placed in a tunnel kiln or a rotary kiln for sintering, and the sintering temperature and time are controlled; After sintering, the mixture is cooled to obtain coal slag sintered insulation bricks.
10. The method for producing a novel lightweight wall insulation material using industrial coal slag according to claim 9, characterized in that: The additive is a flux.