CN111875395B - Energy-saving light foamed ceramic whole body refractory material, energy-saving light foamed ceramic whole body refractory plate and application thereof - Google Patents
Energy-saving light foamed ceramic whole body refractory material, energy-saving light foamed ceramic whole body refractory plate and application thereof Download PDFInfo
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- CN111875395B CN111875395B CN202010644654.3A CN202010644654A CN111875395B CN 111875395 B CN111875395 B CN 111875395B CN 202010644654 A CN202010644654 A CN 202010644654A CN 111875395 B CN111875395 B CN 111875395B
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
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- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
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- C04B2235/3472—Alkali metal alumino-silicates other than clay, e.g. spodumene, alkali feldspars such as albite or orthoclase, micas such as muscovite, zeolites such as natrolite
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Abstract
The invention belongs to the technical field of foamed ceramic refractory materials, and discloses an energy-saving light foamed ceramic whole body refractory material which comprises silica sand, potash feldspar, diopside, high-temperature sand, talcum powder and a foaming agent. Meanwhile, the energy-saving light foamed ceramic whole body refractory plate prepared by the material formula is also provided, wherein the silica sand is high-silicon-content sand, the hardness of the plate is improved, the high-temperature sand also contains a large amount of silicon elements, the proportion of silicon is increased, and the firing temperature is improved; the diopside-containing raw material contains more elements such as aluminum, calcium, magnesium and the like, wherein the magnesium and the aluminum play a role in fire resistance, the aluminum element also effectively improves the strength and toughness of the plate, in addition, the increase of the silicon and the aluminum element improves the initial melting temperature and the sintering temperature together, so that the initial melting temperature of the plate is improved to 1200 ℃ or above on the premise of keeping the original hardness, strength and toughness, the plate has good fire resistance in a bare plate state, and the plate can pass the fire resistance limit detection without adding any outer layer fireproof coating.
Description
Technical Field
The invention belongs to the technical field of refractory materials, and particularly relates to an energy-saving light foamed ceramic whole body refractory material, an energy-saving light foamed ceramic whole body refractory plate and application thereof.
Background
So far, although the density of the foamed ceramics is 0.10 to 0.99g/cm technically3Can be realized, but the lower density can effectively reduce the heat conductivity coefficient of the plate body, so the density of the foamed ceramic insulation board accepted in the market is controlled to be less than 0.2g/cm as far as possible3(ii) a Even if the foamed ceramic partition board needs to bear some impact resistance functions, the density of the foamed ceramic partition board is also intensively controlled to be 0.36-0.45 g/cm3. However, the above two materials have too many closed pores in the bare board state and are easy to be cracked by naked fire, so that the bare board can not satisfy the fire resistance limit at 1000 DEG CCan reach 3h, therefore can't pass the detection of fire endurance, can only pass the detection by additionally adding outer fire-retardant coating.
Disclosure of Invention
The invention aims to provide an energy-saving light foamed ceramic whole body refractory material, an energy-saving light foamed ceramic whole body refractory plate and application thereof, so as to solve one or more technical problems in the prior art and provide at least one beneficial choice or creation condition.
In order to overcome the technical problems, the technical scheme adopted by the invention is as follows:
an energy-saving light foamed ceramic whole body refractory material is mainly prepared from the following raw materials: silica sand, potash feldspar, diopside, high-temperature sand, talcum powder and a foaming agent.
Wherein the high-temperature sand comprises the following raw materials in percentage by mass (28 ℃, 58% RH): al (Al)2O3 18.61％、SiO272.63％、Fe2O3 0.81％、CaO 0.02％、MgO 0.15％、K2O 0.69％、Na2O 0.06％、TiO20.16% and a loss on ignition (1025 ℃) of 6.72%. The potassium feldspar comprises the following raw materials in percentage by mass (25 ℃, 65% RH): al (Al)2O3 14.37％、SiO2 71.92％、Fe2O3 0.32％、CaO 1.84％、MgO 0.34％、K2O 5.05％、Na2O 3.78％、TiO20.07%, ignition loss (1025 ℃) was 2.15%.
As a further improvement of the scheme, the composite material is mainly prepared from the following raw materials in parts by weight: 30-40 parts of silica sand, 30-35 parts of potassium feldspar, 15-20 parts of diopside, 5-10 parts of high-temperature sand, 3-5 parts of talcum powder and 0.5-3 parts of foaming agent. The formula ensures the generation of a eutectic body, thereby ensuring that a blank body is foamed according to the design requirement.
As a further improvement of the scheme, the silica sand is high-silicon-content sand (the silicon content is higher than 92%) and is selected from at least one of quartz sand, river sand, sea sand and silica. The proportion of the silicon element is increased, so that the sintering temperature is properly improved, the hole wall is thickened, and the hole wall breakage caused by the increase of gas expansion is reduced or avoided.
As a further improvement of the above, the diopside may be replaced by a commensal of feldspar and kaolinite.
As a further improvement of the scheme, the foaming agent is coal dust. More gas is generated during the combustion of the pulverized coal, so that the closed air holes can be opened, the closed air holes are reduced, and the number of the vent holes is increased.
The energy-saving light foamed ceramic whole body refractory plate comprises the energy-saving light foamed ceramic whole body refractory material.
The energy-saving light foamed ceramic whole body fireproof plate is applied to a firewall.
The preparation method of the energy-saving light foamed ceramic whole body refractory plate comprises the following steps: preparing materials according to a raw material formula of the energy-saving light foamed ceramic whole body refractory material, mixing, ball milling, granulating, sieving, loading in a sagger in bulk, firing, cutting and processing to obtain the energy-saving light foamed ceramic whole body refractory plate. The ball milling is dry ball milling or wet ball milling. The density of the energy-saving light foamed ceramic whole body refractory plate is 0.60-1.00 g/cm3. The sintering temperature is 1200-1250 ℃, and the sintering duration is 18-30 h.
Wherein the distribution of the foaming pore diameter is as follows: the aperture ratio of the diameter of 1-2 mm is 10-20%, and the aperture ratio of the diameter of 2-4 mm is 70-80%; meanwhile, the closed porosity of the conventional foamed ceramic is more than 80%, while the closed porosity of the foamed ceramic is 50-60% and the through porosity is about 40-50%, and the closed porosity is reduced by increasing the through porosity, so that the space of gas in bubbles is increased, the expansion time is prolonged, and the burst probability is reduced.
The invention has the beneficial effects that: the invention provides an energy-saving light foamed ceramic whole body refractory material, which mainly comprises silica sand, potash feldspar, diopside, high-temperature sand, talcum powder and a foaming agent. The energy-saving light foamed ceramic whole body refractory plate prepared by the material formula is also provided, wherein the silica sand is high-silicon-content sand, the silica element plays a role of a framework, the hardness of the plate is improved, the high-temperature sand also contains a large amount of silica element, the proportion of the silica is increased, and the firing temperature is improved; the diopside-containing raw material contains more elements such as aluminum, calcium, magnesium and the like, wherein the magnesium and the aluminum play a role in fire resistance, the aluminum element also effectively improves the strength and toughness of the plate, in addition, the increase of the silicon and the aluminum element jointly improves the initial melting temperature and the sintering temperature, so that the initial melting temperature of the plate is improved to 1200 ℃ or above on the premise of keeping the original hardness, strength and toughness, the energy-saving light foamed ceramic whole body fire-resistant plate in a bare plate state has good fire resistance, can pass the fire resistance limit detection without adding any outer layer fire-resistant coating, simultaneously has the characteristics of good heat preservation, heat insulation, sound insulation, noise reduction, water and moisture resistance and the like, large strength, high hardness and good fire resistance, is an efficient energy-saving light foamed ceramic whole body fire-resistant plate, and has wide application prospect.
Detailed Description
The present invention is specifically described below with reference to examples in order to facilitate understanding of the present invention by those skilled in the art. It should be particularly noted that the examples are given solely for the purpose of illustration and are not to be construed as limitations on the scope of the invention, as non-essential improvements and modifications to the invention may occur to those skilled in the art, which fall within the scope of the invention as defined by the appended claims. Meanwhile, the raw materials mentioned below are not specified in detail and are all commercially available products; the process steps or extraction methods not mentioned in detail are all process steps or extraction methods known to the person skilled in the art.
Example 1
30Kg of quartz sand, 30Kg of potassium feldspar, 15Kg of diopside, 5Kg of high temperature sand, 3Kg of talcum powder and 0.5Kg of coal powder are uniformly mixed, ball-milled, granulated and sieved, and then the mixture is sintered for 25 hours at 1200 ℃ after being loaded in a bulk sagger and is cut, thus obtaining the energy-saving light foamed ceramic whole body refractory plate 1.
Example 2
Uniformly mixing 40Kg of river sand, 35Kg of potassium feldspar, 20Kg of diopside, 10Kg of high-temperature sand, 5Kg of talcum powder and 1.0Kg of coal powder, carrying out ball milling, granulation and sieving, loading in a bulk sagger, firing at 1220 ℃ for 18h, and cutting to obtain the energy-saving light foamed ceramic whole body refractory plate 2.
Example 3
Evenly mixing 35Kg of sea sand, 32Kg of potash feldspar, 18Kg of diopside, 7.5Kg of high-temperature sand, 4Kg of talcum powder and 1.8Kg of coal powder, carrying out ball milling, granulation and sieving, then loading in a bulk sagger, firing at 1210 ℃ for 21h, and cutting to obtain the energy-saving light foamed ceramic whole body refractory plate 3.
The sintering proves that the blank body of the formula of the invention is basically not foamed below 1200 ℃ or only in a just foamed state, and can not meet the requirement of uniform foaming; above 1200 deg.C, the foaming aperture is different according to different proportion, and the requirement that the formed bare board can realize fire resistance for three hours at 1000 deg.C is met. To date, no record has been published of the ability of other bare panels to achieve a fire resistance of 1000 ℃ for three hours.
It will be obvious to those skilled in the art that many simple derivations or substitutions can be made without inventive effort without departing from the inventive concept. Therefore, simple modifications to the present invention by those skilled in the art according to the present disclosure should be within the scope of the present invention. The above embodiments are preferred embodiments of the present invention, and all similar processes and equivalent variations to those of the present invention should fall within the scope of the present invention.
Claims (5)
1. An energy-saving light foamed ceramic whole body refractory material is characterized by being mainly prepared from the following raw materials: silicon sand, potassium feldspar, diopside, high-temperature sand, talcum powder and foaming agent;
the composite material is mainly prepared from the following raw materials in parts by weight: 30-40 parts of silica sand, 30-35 parts of potassium feldspar, 15-20 parts of diopside, 5-10 parts of high-temperature sand, 3-5 parts of talcum powder and 0.5-3 parts of foaming agent;
the foaming agent is coal dust.
2. The energy-saving lightweight foamed ceramic all-body refractory according to claim 1, wherein the silica sand is selected from at least one of quartz sand, river sand, sea sand, or silica.
3. The energy-saving lightweight foamed ceramic all-body refractory according to claim 1, wherein said diopside is replaced by a commensal of feldspar and kaolinite.
4. An energy-saving light foamed ceramic whole body refractory plate is characterized in that the raw material of the energy-saving light foamed ceramic whole body refractory plate comprises the energy-saving light foamed ceramic whole body refractory material of any one of claims 1 to 3.
5. The use of the energy saving lightweight foamed ceramic full body refractory plate of claim 4 in fire walls.
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Citations (4)
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| AU5076696A (en) * | 1995-05-10 | 1996-11-21 | Alan Johnson | Cellulated materials and process |
| BR9601518A (en) * | 1996-04-09 | 1997-09-09 | Argamassas Quartzolit Ltda | Mortar for elastic and water-repellent grouting composition and manufacturing process |
| CN104072193A (en) * | 2014-06-26 | 2014-10-01 | 鄂尔多斯市紫荆创新研究院 | Foamed ceramic material based on silicon-aluminum-containing solid waste and method for preparing fireproof thermal insulation board |
| CN110595205A (en) * | 2019-08-30 | 2019-12-20 | 佛山市德力泰科技有限公司 | Energy-saving efficient tunnel kiln sintered by multilayer foamed ceramics |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104529510A (en) * | 2014-12-12 | 2015-04-22 | 武汉理工大学 | Preparation method of foaming ceramic |
| CN106440836B (en) * | 2016-11-11 | 2019-04-09 | 佛山市德力泰科技有限公司 | A kind of ceramic energy saving stove of efficient relay recycling cooling residual heat |
| CN108996991A (en) * | 2017-12-18 | 2018-12-14 | 牛汶生 | Utilize the architectural pottery and preparation method thereof of gold tailings and recycling gangue preparation |
| CN109141014B (en) * | 2018-09-06 | 2024-03-15 | 佛山市德力泰科技有限公司 | Composite low-heat-storage energy-saving kiln |
| CN109133975B (en) * | 2018-11-05 | 2021-07-20 | 广东金意陶陶瓷集团有限公司 | Light high-strength foamed ceramic plate and preparation method thereof |
| CN110526681A (en) * | 2019-08-19 | 2019-12-03 | 福建德胜新建材有限公司 | A kind of high fire endurance foamed ceramic and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5076696A (en) * | 1995-05-10 | 1996-11-21 | Alan Johnson | Cellulated materials and process |
| BR9601518A (en) * | 1996-04-09 | 1997-09-09 | Argamassas Quartzolit Ltda | Mortar for elastic and water-repellent grouting composition and manufacturing process |
| CN104072193A (en) * | 2014-06-26 | 2014-10-01 | 鄂尔多斯市紫荆创新研究院 | Foamed ceramic material based on silicon-aluminum-containing solid waste and method for preparing fireproof thermal insulation board |
| CN110595205A (en) * | 2019-08-30 | 2019-12-20 | 佛山市德力泰科技有限公司 | Energy-saving efficient tunnel kiln sintered by multilayer foamed ceramics |
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