CN111004023A - Method for preparing foamed ceramic insulation board by using construction waste - Google Patents
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- CN111004023A CN111004023A CN201911099794.0A CN201911099794A CN111004023A CN 111004023 A CN111004023 A CN 111004023A CN 201911099794 A CN201911099794 A CN 201911099794A CN 111004023 A CN111004023 A CN 111004023A
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Abstract
The invention provides a method for preparing a foamed ceramic insulation board by using construction waste, which sequentially comprises the following steps: s1 selecting waste materials to be used, mixing the S2 formula and firing the product S3. According to the invention, inorganic non-metal waste with high silicon content is adopted to replace part of perlite which is a main raw material, so that the foaming effect of the product is enhanced, and at high temperature, the waste rich in silicon and the raw material are co-melted to form a high-viscosity silicate melt, so that gas cannot be easily diffused outwards and is sealed in the material to generate sealed pores, and finally, a high-quality heat-insulating material with low volume density, high porosity and uniform pore size distribution is obtained; meanwhile, the method provides a use value for the construction waste, reduces the environmental pollution and also reduces the production cost of a factory.
Description
Technical Field
The invention relates to the technical field of production of foamed ceramic insulation boards, in particular to a method for preparing a foamed ceramic insulation board by using construction waste.
Background
With the acceleration of industrialization and urbanization, the construction industry is rapidly developing, and along with the increase of the generated construction waste, the quantity of Chinese construction waste accounts for more than 1/3 of the total quantity of municipal waste. The treatment of newly added construction waste occupies 1.5 to 2 hundred million square meters land each year. China is in the period of high-speed development of economic construction, and hundreds of millions of tons of construction wastes are inevitably generated every year. If the treatment and the utilization are not carried out in time, adverse effects are inevitably brought to the society, the environment and resources. Moreover, the unreasonable stacking of construction waste causes great pollution to the environment, including water resources, air quality and the like. The product of the company can recycle the waste of the buildings, and the utilization rate of the waste of the buildings is improved as much as possible under the condition of not influencing the quality of the ceramic insulation board, so that the environmental pollution is reduced, and the production cost of a factory is reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for preparing a foamed ceramic insulation board by using construction waste.
The invention solves the technical problems through the following technical means:
the method for preparing the foamed ceramic insulation board by utilizing the construction waste sequentially comprises the following steps:
s1, selecting and matching the waste materials to be used:
selecting inorganic non-metallic waste materials with high silicon content from construction waste materials, comprising: waste clay blocks, waste glass and fly ash; mixing the selected multiple wastes in equal mass to obtain standby wastes;
and (8) formula mixing of S2:
according to the mass parts, 10 parts of waste to be used, 65 parts of perlite, 7 parts of zeolite powder, 5 parts of talc, 3 parts of bentonite, 5 parts of shale, 5 parts of feldspar and 0.5 part of foaming agent are put into a ball mill to be ball-milled and uniformly mixed, so that the fineness of the mixture obtained by ball milling reaches 1.2% under 250 meshes;
s3, firing into a finished product:
and pressing and molding the mixture with the fineness meeting the requirement to obtain a heat-insulation board blank, drying the blank for 2 hours, and then feeding the blank into a furnace to sinter to obtain a finished product.
Preferably, in the S3 process, the dried blank is sent into a high-temperature electric furnace, the temperature is raised for 38 minutes at 0-250 ℃, and the temperature is kept for 8 minutes; heating for 50 minutes at 250-950 ℃ and keeping the temperature for 8 minutes; heating for 40 minutes at 950-1120 ℃ and preserving heat for 8 minutes; the temperature rise time is 22 minutes at 1120-1150 ℃ and the heat preservation time is 8 minutes; heating to 1150-1180 deg.c for 10 min and maintaining for 5 min; heating to 1180-1200 deg.c for 5 min and maintaining for 5 min; sintering to obtain the finished product.
The invention has the advantages that:
compared with the prior art, the inorganic non-metal waste material with high silicon content is adopted to replace part of the main raw material perlite, so that the foaming effect of the product is enhanced, the waste material rich in silicon and the raw material are co-melted at high temperature to form a high-viscosity silicate melt, so that gas cannot be easily diffused outwards and is sealed in the material to generate sealed pores, and finally, the high-quality heat-insulating material with low volume density, high porosity and uniform pore size distribution is obtained; meanwhile, the method provides a use value for the construction waste, reduces the environmental pollution and also reduces the production cost of a factory.
Drawings
FIG. 1 is a graph of formulation, temperature, porosity as described in the examples of the present invention;
FIG. 2 is a graph showing the relationship among the formulation, temperature, and volume weight according to the embodiment of the present invention;
FIG. 3 is a graph showing the relationship between the formulation, temperature and compressive strength of an embodiment of the present invention;
FIG. 4 is a micrograph of a sample prepared according to the formulation of example 1 of the present invention at a maximum sintering temperature of 1200 ℃.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Example 1
The embodiment provides a method for preparing a foamed ceramic insulation board by using construction waste, which sequentially comprises the following steps:
s1, selecting and matching the waste materials to be used:
selecting inorganic non-metallic waste materials with high silicon content from construction waste materials, comprising: waste clay blocks, waste glass and fly ash; mixing the selected multiple wastes in equal mass to obtain standby wastes; the foaming effect of the product can be enhanced by adding the inorganic non-metallic waste with higher silicon content into the raw materials of the foamed ceramic insulation board, and because the foaming agent can generate pyrolysis or redox reaction at high temperature, volatile gas is generated and is co-melted with the material matrix; meanwhile, the solvent raw materials are co-melted at high temperature to form a high-viscosity silicate melt, so that gas cannot easily diffuse outwards and is sealed in the material to cause the whole material to expand; as the firing temperature decreases, the gas enclosed inside the material by the molten high-temperature melt generates closed pores. Reasonable raw material composition and a temperature sintering system are adopted, proper viscosity of high-temperature melt and proper amount of gas generated by the reaction of the foaming agent are ensured, and finally, the high-quality heat-insulating material with low volume density, high porosity and uniform pore size distribution is obtained.
And (8) formula mixing of S2:
according to the mass parts, 10 parts of waste to be used, 65 parts of perlite, 7 parts of zeolite powder, 5 parts of talc, 3 parts of bentonite, 5 parts of shale, 5 parts of feldspar and 0.5 part of foaming agent are put into a ball mill to be ball-milled and uniformly mixed, so that the fineness of the mixture obtained by ball milling reaches 1.2% under 250 meshes;
s3, firing into a finished product:
and pressing and molding the mixture with the fineness meeting the requirement to obtain a heat-insulation board blank, drying the blank for 2 hours, and then feeding the blank into a furnace to sinter to obtain a finished product.
In the S3 process, the dried blank is sent into a high-temperature electric furnace, the temperature is raised for 38 minutes at the temperature of 0-250 ℃, and the temperature is kept for 8 minutes; heating for 50 minutes at 250-950 ℃ and keeping the temperature for 8 minutes; heating for 40 minutes at 950-1120 ℃ and preserving heat for 8 minutes; the temperature rise time is 22 minutes at 1120-1150 ℃ and the heat preservation time is 8 minutes; heating to 1150-1180 deg.c for 10 min and maintaining for 5 min; heating to 1180-1200 deg.c for 5 min and maintaining for 5 min; sintering to obtain the finished product.
Example 2
The formula in the S2 comprises, by mass, 3 parts of waste to be used, 72 parts of perlite, 7 parts of zeolite powder, 5 parts of talc, 3 parts of bentonite, 5 parts of shale, 5 parts of feldspar and 0.5 part of foaming agent.
Example 3
The formula in the S2 comprises, by mass, 5 parts of waste to be used, 70 parts of perlite, 7 parts of zeolite powder, 5 parts of talc, 3 parts of bentonite, 5 parts of shale, 5 parts of feldspar and 0.5 part of foaming agent.
Firing the mixture in the above embodiment at the highest sintering temperature of 800 ℃, 900 ℃, 1000 ℃, 1100 ℃, 1200 ℃ respectively to obtain multiple groups of samples, and detecting the porosity, volume weight, and strength of the multiple groups of samples respectively to obtain a relationship diagram of formula, temperature, and porosity as shown in fig. 1; as shown in FIG. 2, the relationship diagram of formula, temperature and volume weight; FIG. 3 shows the relationship among formulation, temperature and compressive strength.
Porosity and volume weight are two important parameters for evaluating the performance of porous materials. Apparent porosity is the percentage of the total volume of the internal pores of the sample to the total volume of the sample, in%; volume weight means the ratio of mass to volume of a sample when it is completely dried, and the unit is KG/M3The volume weight directly reflects the degree of densification of the prepared sample. According to the experimental method for porosity and volume weight of porous ceramics.
The compressive strength of the thermal insulation material is an important index for determining the practicability of the thermal insulation material, and the change of the compressive strength of the material along with the highest sintering temperature is shown in figure 3. From fig. 3, it can be seen that the compressive strength of the material shows a significant trend of increasing with the increase of the maximum sintering temperature, because the sample becomes more and more compact, the pore size becomes smaller, the porosity increases, and the compressive strength of the material inevitably increases with the increase of the maximum sintering temperature.
As can be seen from FIGS. 1 to 3, the formula is as follows: 10 parts of waste to be used, 65 parts of perlite, 7 parts of zeolite powder, 5 parts of talc, 3 parts of bentonite, 5 parts of shale, 5 parts of feldspar and 0.5 part of foaming agent; when the highest sintering temperature is 1200 ℃, the prepared high-quality sample has high porosity, low volume weight and high compressive strength.
The chemical compositions of the high-quality samples obtained by X-ray diffraction analysis are shown in the following table:
| SiO2 | Al2O3 | CaO+MgO | Na2O+K2O | Fe2O3 | IL (ignition loss) |
| 56-70wt％ | 10-20wt％ | 1.5-6wt％ | 3-8wt％ | 5-8wt％ | 4-9wt％ |
As shown in fig. 4, microscopic observation is performed on the high-quality sample, and the high-quality sample consists of closed pores with uniform sizes, so that the high-quality sample is proved to be a high-quality foamed ceramic insulation board with stable structure, low density and high compressive strength.
It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (2)
1. The method for preparing the foamed ceramic insulation board by using the construction waste is characterized by comprising the following steps of: the method comprises the following steps in sequence:
s1, selecting and matching the waste materials to be used:
selecting inorganic non-metallic waste materials with high silicon content from construction waste materials, comprising: waste clay blocks, waste glass and fly ash; mixing the selected multiple wastes in equal mass to obtain standby wastes;
and (8) formula mixing of S2:
according to the mass parts, 10 parts of waste to be used, 65 parts of perlite, 7 parts of zeolite powder, 5 parts of talc, 3 parts of bentonite, 5 parts of shale, 5 parts of feldspar and 0.5 part of foaming agent are put into a ball mill to be ball-milled and uniformly mixed, so that the fineness of the mixture obtained by ball milling reaches 1.2% under 250 meshes;
s3, firing into a finished product:
and pressing and molding the mixture with the fineness meeting the requirement to obtain a heat-insulation board blank, drying the blank for 2 hours, and then feeding the blank into a furnace to sinter to obtain a finished product.
2. The method for preparing the foamed ceramic insulation board by using the construction waste according to claim 1, characterized in that: in the S3 process, the dried blank is sent into a high-temperature electric furnace, the temperature is raised for 38 minutes at the temperature of 0-250 ℃, and the temperature is kept for 8 minutes; heating for 50 minutes at 250-950 ℃ and keeping the temperature for 8 minutes; heating for 40 minutes at 950-1120 ℃ and preserving heat for 8 minutes; the temperature rise time is 22 minutes at 1120-1150 ℃ and the heat preservation time is 8 minutes; heating to 1150-1180 deg.c for 10 min and maintaining for 5 min; heating to 1180-1200 deg.c for 5 min and maintaining for 5 min; sintering to obtain the finished product.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105399437A (en) * | 2015-11-20 | 2016-03-16 | 信阳科美新型材料有限公司 | Thermal-insulating and decorative porcelain plate quickly fired at ultralow temperature and production method of thermal-insulating and decorative porcelain plate |
| CN106927861A (en) * | 2017-03-02 | 2017-07-07 | 福州外语外贸学院 | A kind of building heat preservation brick of high insulating effect and preparation method thereof |
| CN108794050A (en) * | 2018-07-10 | 2018-11-13 | 山东理工大学 | A kind of low cost height is held one's breath the preparation method of porosity heat-insulating construction material |
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- 2019-11-12 CN CN201911099794.0A patent/CN111004023A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105399437A (en) * | 2015-11-20 | 2016-03-16 | 信阳科美新型材料有限公司 | Thermal-insulating and decorative porcelain plate quickly fired at ultralow temperature and production method of thermal-insulating and decorative porcelain plate |
| CN106927861A (en) * | 2017-03-02 | 2017-07-07 | 福州外语外贸学院 | A kind of building heat preservation brick of high insulating effect and preparation method thereof |
| CN108794050A (en) * | 2018-07-10 | 2018-11-13 | 山东理工大学 | A kind of low cost height is held one's breath the preparation method of porosity heat-insulating construction material |
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Application publication date: 20200414 |