CN116423614A - Dry forming method for light mullite brick - Google Patents
Dry forming method for light mullite brick Download PDFInfo
- Publication number
- CN116423614A CN116423614A CN202310250960.2A CN202310250960A CN116423614A CN 116423614 A CN116423614 A CN 116423614A CN 202310250960 A CN202310250960 A CN 202310250960A CN 116423614 A CN116423614 A CN 116423614A
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- CN
- China
- Prior art keywords
- mullite
- brick
- dry forming
- mullite brick
- lightweight
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011449 brick Substances 0.000 title claims abstract description 47
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 229910052863 mullite Inorganic materials 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000010304 firing Methods 0.000 claims abstract description 22
- 239000010451 perlite Substances 0.000 claims abstract description 16
- 235000019362 perlite Nutrition 0.000 claims abstract description 16
- INJRKJPEYSAMPD-UHFFFAOYSA-N aluminum;silicic acid;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O INJRKJPEYSAMPD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000010443 kyanite Substances 0.000 claims abstract description 14
- 229910052850 kyanite Inorganic materials 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 238000003825 pressing Methods 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 5
- 238000005245 sintering Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 21
- 238000001035 drying Methods 0.000 abstract description 9
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 5
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229920006389 polyphenyl polymer Polymers 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/243—Setting, e.g. drying, dehydrating or firing ceramic articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
- B28B17/02—Conditioning the material prior to shaping
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention relates to the field of mullite bricks, in particular to a dry forming method of a lightweight mullite brick. The method comprises the steps of firstly mixing the expanded perlite, the mullite clinker and the kyanite, and then adjusting the pressure according to the preset density for pressing. Then, firing is performed. When the scheme is used for producing the light mullite brick, compared with the traditional method, the method has the following advantages: firstly, no harmful gas is discharged during firing, which meets the environmental protection requirement; secondly, the traditional procedures of drying in the shade and baking are not needed, and the production period is greatly shortened; thirdly, after firing, the finished product is stable in size, and the fired green bricks do not need to be cut, so that the production cost is saved; fourth, because traditional shade drying and drying procedures are not needed, the occupied area required by production is reduced, and according to measurement and calculation, the productivity of the scheme is about 10 times of that of the traditional mullite brick production in the same production area.
Description
Technical Field
The invention relates to the field of mullite bricks, in particular to a dry forming method of a lightweight mullite brick.
Background
The existing mullite brick is generally manufactured by a wet method, and the main raw materials are kaolin, polystyrene plastic particles (such as foam polystyrene particles), mullite clinker, sawdust and the like. The method has irregular shrinkage of 6% of the whole volume after firing, so that the 6 faces of the brick body are required to be cut to reach the preset size. The manufacturing method has the following defects: firstly, the water adding amount is large, the production period is long, the influence of weather conditions is large when the materials are dried in the shade, and the efficiency is low; second, the polyphenyl plastic particles produce harmful volatiles (like burning plastics) during firing; thirdly, the production cost is higher, in order to obtain the brick with proper size, the fired rough adobe is required to be cut, and about 1.6 tons of materials can only produce about 1 ton of finished products, so that a certain degree of waste is caused.
Disclosure of Invention
The invention provides a dry forming method of a lightweight mullite brick, which aims to solve the problems.
The dry forming method of the lightweight mullite brick adopts the following technical scheme: a dry forming method of a lightweight mullite brick comprises the following steps:
step one: mixing the raw materials: adding the expanded perlite into a stirrer, adding a preset amount of water, uniformly mixing to enable the perlite to be semi-dry and semi-wet, and then adding the mullite clinker fine powder and the kyanite fine powder to fully stir and uniformly mix to enable the mullite clinker and the kyanite to be uniformly wrapped on the expanded perlite;
step two: and (5) press forming: pressing the uniformly mixed raw materials in the step one by using a brick press; and adjusting the pressing pressure according to the requirements to adjust the molding density;
step three: and (3) firing and forming: and (3) sintering the green bricks pressed in the second step.
Further, the mixing proportion in the first step is mass percent, and the preset proportion of each component is as follows: the content of the expanded perlite is about 20 percent, the content of the mullite clinker is 65 to 70 percent, and the content of the kyanite is about 10 to 15 percent.
Further, the sintering temperature in the third step is 1400 ℃.
Further, the mullite clinker is 325 mesh in size; the kyanite is about 150 meshes.
Further, the stirrer in the first step adopts a gravity-free stirrer.
Further, the brick press adopts a double-sided pressurized hydraulic brick press.
Further, the preset amount of the pre-added water in the first step is 2% -3%.
The beneficial effects of the invention are as follows: when the scheme is used for producing the light mullite brick, compared with the traditional method, the method has the following advantages: firstly, no harmful gas is discharged during firing, which meets the environmental protection requirement; secondly, the traditional procedures of drying in the shade and baking are not needed, and the production period is greatly shortened; thirdly, after firing, the finished product is stable in size, and the fired green bricks do not need to be cut, so that the production cost is saved; fourth, because traditional shade drying and drying procedures are not needed, the occupied area required by production is reduced, and according to measurement and calculation, the productivity of the scheme is about 10 times of that of the traditional mullite brick production in the same production area.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a schematic step diagram of an embodiment of a method for dry forming a lightweight mullite brick of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the method for dry forming the light mullite brick comprises the following steps: a dry forming method of a lightweight mullite brick comprises the following steps.
Firstly, selecting the following raw materials in parts by mass:
the content of the expanded perlite is about 20%; the material has a low density of 1m 3 About 70kg.
The content of the mullite clinker is 65-70%, and simultaneously, the mullite clinker with the size of 325 meshes is selected to be favorable for bonding during raw material stirring.
The kyanite content is about 10% -15%, and the particle size is about 150 meshes.
And secondly, manufacturing the light mullite brick. The manufacturing process is as follows:
1. stirring and mixing evenly: adding the expanded perlite into a stirrer, adding 2% -3% of water, uniformly mixing to enable the perlite to be semi-dry and semi-wet, and then adding the mullite clinker fine powder and the kyanite fine powder to fully stir and uniformly mix to enable the mullite clinker and kyanite to be uniformly wrapped on the expanded perlite; the stirrer adopts a gravity-free stirrer;
2. and (5) press forming: pressing and molding the uniformly mixed raw materials by using a brick press; and adjusting the pressing pressure to adjust the molding density according to the requirement; the brick machine adopts a double-sided pressurizing hydraulic brick machine; tested, the density when pressed was 0.8g/cm 3 And when the mullite brick is tested, the compressive strength is more than 3 megapascals.
3. And (3) firing and forming: the firing temperature was 1400 ℃. The shrinkage of the volume of the mullite brick after practical firing is about 0.5% as compared with the volume at the time of press molding.
In the manufacturing process of the mullite brick, the expanded perlite has the following main functions: first, the expanded perlite melts during firing, thereby forming pores during firing of the mullite brick. Replaces the traditional hole forming of polyphenyl plastic particles, has no harmful gas discharge during firing, and meets the environmental protection requirement. And the second, expanded perlite has smaller density, and the proper adjustment of the proportion of the expanded perlite can play a role in adjusting the overall density. Thirdly, the overall firing temperature is different according to the different adding proportion of the expanded perlite, so that the firing temperature is regulated. The kyanite is converted into mullite after firing, and compared with the volume of the kyanite in two states before and after firing, the kyanite has about 15 percent of volume expansion, so that the volume shrinkage of mullite clinker during sintering is counteracted, and the volume change amount of the product produced by the scheme is within the required range before and after firing, and is usually only about 0.5 percent of change. Therefore, the method has the following advantages compared with the traditional method when the lightweight mullite brick is produced: firstly, no harmful gas is discharged during firing, which meets the environmental protection requirement; secondly, the traditional procedures of drying in the shade and baking are not needed, and the production period is greatly shortened; thirdly, after firing, the finished product is stable in size, and the fired green bricks do not need to be cut, so that the production cost is saved; fourth, because traditional shade drying and drying procedures are not needed, the occupied area required by production is reduced, and according to measurement and calculation, the productivity of the scheme is about 10 times of that of the traditional mullite brick production in the same production area.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. The dry forming method of the light mullite brick is characterized by comprising the following steps of:
step one: mixing the raw materials: adding the expanded perlite into a stirrer, adding a preset amount of water, uniformly mixing, and then adding the mullite clinker fine powder and the kyanite fine powder to fully stir and uniformly mix;
step two: and (5) press forming: pressing the uniformly mixed raw materials in the step one by using a brick press; and adjusting the pressing pressure according to the requirements to adjust the molding density;
step three: and (3) firing and forming: and (3) sintering the green bricks pressed in the second step.
2. The method for dry forming of the lightweight mullite brick according to claim 1, which is characterized in that: the mixing proportion in the first step is mass percent, and the preset proportion of each component is as follows: the content of the expanded perlite is about 20 percent, the content of the mullite clinker is 65 to 70 percent, and the content of the kyanite is about 10 to 15 percent.
3. The method for dry forming of the lightweight mullite brick according to claim 2, which is characterized in that: the sintering temperature in the third step is 1400 ℃.
4. A method for dry forming a lightweight mullite brick according to claim 3, characterized by: the mullite clinker is 325 mesh in size; the kyanite is about 150 meshes.
5. The method for dry forming of the lightweight mullite brick according to claim 1, which is characterized in that: the stirrer in the first step adopts a gravity-free stirrer.
6. The method for dry forming the lightweight mullite brick of claim 5 wherein the steps of: the brick machine adopts a double-sided pressurized hydraulic brick machine.
7. The method for dry forming of the lightweight mullite brick according to claim 1, which is characterized in that: the preset amount of the pre-added water in the first step is 2% -3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310250960.2A CN116423614A (en) | 2023-03-15 | 2023-03-15 | Dry forming method for light mullite brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310250960.2A CN116423614A (en) | 2023-03-15 | 2023-03-15 | Dry forming method for light mullite brick |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116423614A true CN116423614A (en) | 2023-07-14 |
Family
ID=87080661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310250960.2A Pending CN116423614A (en) | 2023-03-15 | 2023-03-15 | Dry forming method for light mullite brick |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116423614A (en) |
-
2023
- 2023-03-15 CN CN202310250960.2A patent/CN116423614A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
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