CN114380604B - Refractory plastic material with high thermal shock resistance and preparation method thereof - Google Patents
Refractory plastic material with high thermal shock resistance and preparation method thereof Download PDFInfo
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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
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/447—Phosphates or phosphites, e.g. orthophosphate, hypophosphite
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- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
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Abstract
The invention discloses a refractory plastic material with high thermal shock resistance and a preparation method thereof, and aims to provide a refractory plastic material with high thermal shock resistance and good thermal shock resistance and a preparation method thereof. The refractory plastic material comprises a component A and a component B, wherein the component A comprises the following components in parts by weight: 60-70 parts of corundum aggregate, 20-40 parts of corundum powder, 5-10 parts of mullite, 5-10 parts of cristobalite and 1-5 parts of plasticizer, wherein the component B is aluminum dihydrogen phosphate solution. The invention has the beneficial effects that: mullite and cristobalite are added into the component A, so that the thermal shock resistance can be improved; trimethyl benzene phosphate is used as a plasticizer, so that the thermal stability is high, and the thermal shock resistance can be improved; the spiral stirring sheet is matched with the material guide block on the inner wall of the mixing barrel, so that the mixing is more sufficient, and the thermal shock resistance can be improved; the position of the liquid discharge hole is set to be matched with the feeding groove arranged on the stirring sheet, so that the component B and the component A are fully mixed, and the thermal shock resistance is improved.
Description
Technical Field
The invention relates to the technical field of refractory plastic materials, in particular to a refractory plastic material with high thermal shock resistance and a preparation method thereof.
Background
The refractory plastic material is made up by using refractory aggregate, powder material, raw clay, chemical composite binder and additive through the processes of compounding, mixing, extruding into adobe form, packaging and storing for a certain time, and can still have good plasticity, and can be constructed by using tamping method. Because the plastic refractory is commonly used in high-temperature environment, the traditional plastic refractory is easy to have the problems of poor thermal shock resistance under high-temperature conditions and the like.
Chinese patent application publication no: CN 108947503A, application publication No. 2018.12.07, discloses a preparation method of a refractory plastic material, which comprises the following specific preparation steps: (1) Putting magnesite into a muffle furnace, heating to 1150-1300 ℃, calcining for 3.2-4h, cooling to room temperature to obtain light-burned magnesite, putting the light-burned magnesite into a stone grinding machine to grind for 1.5-2h, and sieving with a 100-mesh sieve to obtain light-burned magnesite powder. This scheme can avoid plastic material inner structure to become loose to improve the intensity of plastic refractory under high temperature environment. But this solution does not achieve high thermal shock resistance.
Therefore, a refractory plastic material with high thermal shock resistance and a preparation method thereof are needed to be designed, and the thermal shock resistance is improved.
Disclosure of Invention
The invention provides a high thermal shock resistance refractory plastic material with good thermal shock resistance and a preparation method thereof, aiming at overcoming the defect of poor thermal shock resistance in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: a refractory plastic material with high thermal shock resistance comprises a component A and a component B, wherein the component A comprises the following components in parts by weight: 60-70 parts of corundum aggregate, 20-40 parts of corundum powder, 5-10 parts of mullite, 5-10 parts of cristobalite and 1-5 parts of plasticizer, wherein the component B is aluminum dihydrogen phosphate solution.
Preferably, the weight ratio of the component A to the component B is 2-6.
Preferably, the density of the aluminum dihydrogen phosphate solution is 1.2-1.6g/ml. The aluminum dihydrogen phosphate is used as a catalyst for dehydration reaction, so that the solidification time is shortened, and the thermal shock resistance is improved.
Preferably, the plasticizer is trimethyl benzene phosphate. High thermal stability and high thermal shock resistance.
A preparation method of refractory plastic material with high thermal shock resistance comprises the following steps:
s1, weighing and measuring an aluminum dihydrogen phosphate solution of the component B;
s2, weighing and measuring corundum aggregate, corundum powder, mullite, cristobalite and a plasticizer to obtain a component A; and S3, mixing the component A and the component B, putting the mixture into a mold, and compacting the mixture into a blank for storage.
As preferred, including the mixing body in step S3 be used for the mixture of A component and B component, the mixing body includes support and blending hopper, the support is connected with the blending hopper, the blending hopper internal rotation is connected with annotates the liquid pipe, it has cup jointed the stirring piece to annotate the liquid pipe, the blending hopper inner wall is provided with a plurality of guide blocks, the guide block becomes certain angle slope with the horizontal plane and arranges, annotate the liquid pipe top and cup jointed the part dish, the part dish is connected with the stirring piece, it passes blending hopper top surface and external infusion pump to annotate the liquid pipe, the blending hopper below is connected with the discharging pipe of taking the switch. The liquid injection pipe is rotationally connected in the mixing barrel, the liquid injection pipe drives the stirring sheet to rotate, the stirring and mixing effects are realized, the material distribution disc is connected above the stirring sheet, different materials in the component A can be classified by the material distribution disc and are injected into the mixing barrel, the feeding precision is ensured, and the stirring and mixing effects are better; the liquid injection pipe is externally connected with a liquid injection pump, so that a solution of the component B can be pumped into the liquid injection pipe and enters the mixing barrel from the liquid injection pipe, and the guide block and the stirring sheet arranged on the side wall of the mixing barrel act together to realize the full mixing of the component A and the component B and ensure that the formed plastic material has good thermal shock resistance; the discharging pipe is arranged below the mixing barrel and provided with a switch, and the mixed plastic material can be discharged from the discharging pipe.
Preferably, the stirring sheet is spiral, the upper surface of the stirring sheet is provided with a plurality of feeding grooves, the material distribution disc is provided with a material distribution groove, the material distribution groove is provided with a material dropping hole, and the material dropping hole corresponds to the feeding grooves. Each feed chute corresponds to a corresponding blanking hole, so that different raw materials enter the mixing barrel from different feed chutes respectively, sufficient mixing is ensured, and the raw materials have good thermal shock resistance after being mixed.
Preferably, the side wall of the liquid injection pipe is provided with a plurality of liquid discharge holes, the liquid discharge holes are arranged between two adjacent layers of the stirring sheet, the bottom of the liquid injection pipe is connected with a rotating motor, and the rotating motor is connected with the outer bottom surface of the mixing barrel. The liquid discharge hole is arranged so that the solution of the component B can be better mixed with the raw material of the component A, and the thermal shock resistance is improved after the full mixing is ensured.
Preferably, the top surface of mixing barrel is provided with a plurality of holes of stepping down, the hole of stepping down is corresponding with the branch silo, hole outside one end of stepping down is connected with the inlet pipe. The feed pipe injects each raw material in the A component into the corresponding feed chute on the stirring sheet through the connected abdicating hole, so as to ensure that the A component and the B component are fully mixed and ensure high thermal shock resistance.
Preferably, the outer side wall of the mixing barrel is symmetrically provided with two connecting blocks, the connecting blocks and the discharge pipe are on the same vertical plane, the lower surface of one connecting block is connected with a telescopic cylinder, and the telescopic cylinder is connected with the support. The retraction action of the telescopic cylinder can sink one end of the discharge pipe, and the mixed plastic can be discharged due to the inclination of the mixing barrel.
The invention has the beneficial effects that: mullite and cristobalite are added into the component A, so that the thermal shock resistance can be improved; trimethyl benzene phosphate is used as a plasticizer, so that the thermal stability is high, and the thermal shock resistance can be improved; the spiral stirring sheet is matched with the material guide block on the inner wall of the mixing barrel, so that the mixing is more sufficient, and the thermal shock resistance can be improved; the position of the liquid discharge hole is set to be matched with the feeding groove arranged on the stirring sheet, so that the component B and the component A are fully mixed, and the thermal shock resistance is improved.
Drawings
FIG. 1 is a production flow diagram of the present invention;
FIG. 2 is a perspective view of the present invention;
FIG. 3 is a side view of the present invention;
FIG. 4 isbase:Sub>A cross-sectional view A-A of FIG. 3;
FIG. 5 is a perspective view of a stirring blade of the present invention;
fig. 6 is a top view of the dispensing tray of the present invention.
In the drawings, there is shown in the drawings,
1. the device comprises a support, a mixing barrel 2, a liquid injection pipe 3, a stirring sheet 4, a material guide block 5, a material distribution disc 6, a material discharge pipe 7, a yielding hole 20, a material inlet pipe 21, a telescopic cylinder 23, a liquid discharge hole 30, a rotating motor 31, a material inlet groove 40, a material distribution groove 60 and a material discharge hole 61.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
A refractory plastic material with high thermal shock resistance comprises a component A and a component B, wherein the component A comprises the following components in parts by weight: 60-70 parts of corundum aggregate, 20-40 parts of corundum powder, 5-10 parts of mullite, 5-10 parts of cristobalite and 1-5 parts of plasticizer, wherein the component B is aluminum dihydrogen phosphate solution.
The weight ratio of the component A to the component B is 2-6.
The density of the aluminum dihydrogen phosphate solution is 1.2-1.6g/ml.
The plasticizer is trimethyl benzene phosphate.
A preparation method of refractory plastic material with high thermal shock resistance comprises the following steps:
s1, weighing and measuring an aluminum dihydrogen phosphate solution of the component B;
s2, weighing and measuring corundum aggregate, corundum powder, mullite, cristobalite and a plasticizer to obtain a component A; and S3, mixing the component A and the component B, putting the mixture into a mold, and compacting the mixture into a blank for storage.
Example 1
The embodiment provides a refractory plastic material with high thermal shock resistance, which comprises a component A and a component B, wherein the component A comprises the following components in parts by weight: 60 parts of corundum aggregate, 20 parts of corundum powder, 5 parts of mullite, 5 parts of cristobalite and 1 part of plasticizer, wherein the component B is aluminum dihydrogen phosphate solution. The weight ratio of the component A to the component B is 2. The density of the aluminum dihydrogen phosphate solution is 1.2g/ml. The plasticizer is trimethyl benzene phosphate.
Example 2
The embodiment provides a refractory plastic material with high thermal shock resistance, which comprises a component A and a component B, wherein the component A comprises the following components in parts by weight: 65 parts of corundum aggregate, 30 parts of corundum powder, 7 parts of mullite, 7 parts of cristobalite and 1 part of plasticizer, wherein the component B is aluminum dihydrogen phosphate solution. The weight ratio of the component A to the component B is 4. The density of the aluminum dihydrogen phosphate solution is 1.4g/ml. The plasticizer is trimethyl benzene phosphate.
Example 3
The embodiment provides a refractory plastic material with high thermal shock resistance, which comprises a component A and a component B, wherein the component A comprises the following components in parts by weight: 70 parts of corundum aggregate, 40 parts of corundum powder, 10 parts of mullite, 10 parts of cristobalite and 1 part of plasticizer, wherein the component B is aluminum dihydrogen phosphate solution. The weight ratio of the component A to the component B is 6. The density of the aluminum dihydrogen phosphate solution is 1.6g/ml. The plasticizer is trimethyl benzene phosphate.
Comparative example
This comparative example provides a high thermal shock resistance's plastic refractory, and this plastic refractory includes A component and B component, wherein, with part by weight, A component includes: 60 parts of corundum aggregate, 20 parts of corundum powder and 1 part of plasticizer, wherein the component B is aluminum dihydrogen phosphate solution. The weight ratio of the component A to the component B is 2. The density of the aluminum dihydrogen phosphate solution is 1.2g/ml. The plasticizer is trimethyl benzene phosphate.
The components A and B in the above examples 1, 2 and 3 and the comparative example are injected into a mixing barrel to be fully mixed, then the mixture is placed into a mould to be compacted and solidified, and the thermal shock resistance of the mixture is represented by the thermal cycle times of half damaged heated end faces by adopting a straight brick water quenching method (YB 376), and the data is shown in table 1.
| Comparative example 1 | Example 1 | Example 2 | Example 3 | |
| Number of |
40 | 75 | 90 | 102 |
Table 1
According to the data of the comparative example, the examples 1, 2 and 3 and the data of the tables, it can be found that the thermal shock resistance of the plastic without adding mullite and cristobalite is obviously weaker than that of the plastic with adding mullite and cristobalite, and that the thermal shock resistance is enhanced as the adding ratio of mullite to cristobalite is increased.
In the case of the example 4, it is preferred,
as shown in FIGS. 1-4, step S3 includes a mixing mechanism for mixing the A component and the B component. The mixing mechanism comprises a bracket 1 and a mixing barrel 2. The bracket 1 is connected with the mixing barrel 2. The mixing barrel 2 is rotatably connected with a liquid injection pipe 3. The liquid injection pipe 3 is sleeved with a stirring sheet 4. The inner wall of the mixing barrel 2 is provided with a plurality of material guiding blocks 5. The material guide block 5 is obliquely arranged at a certain angle with the horizontal plane. A material distributing disc 6 is sleeved above the liquid injection pipe 3. The material distributing disc 6 is connected with the stirring sheet 4. The liquid injection pipe 3 penetrates through the top surface of the mixing barrel 2 and is externally connected with a liquid injection pump. A discharge pipe 7 with a switch is connected below the mixing barrel 2.
As shown in fig. 4-6, the stirring blade 4 has a spiral shape. The upper surface of the stirring sheet 4 is provided with a plurality of feeding grooves 40. The distributing tray 6 is provided with a distributing groove 60. The distributing chute 60 is provided with a blanking hole 61. The blanking hole 61 corresponds to the feed chute 40.
As shown in FIG. 5, the side wall of the pouring spout 3 is provided with a plurality of drain holes 30. The drain holes 30 are arranged between two adjacent layers of the stirring sheet 4. The bottom of the liquid injection pipe 3 is connected with a rotating motor 31. The rotation motor 31 is connected to the outer bottom surface of the mixing tub 2.
As shown in fig. 2 and 3, the top surface of the mixing barrel 2 is provided with a plurality of relief holes 20. The abdicating hole 20 corresponds to the material distributing groove 60. One end of the outside of the abdicating hole 20 is connected with a feeding pipe 21.
As shown in fig. 1 to 3, two connecting blocks are symmetrically arranged on the outer side wall of the mixing barrel 2. The connecting blocks and the discharge pipe 7 are on the same vertical plane, and the lower surface of one connecting block is connected with a telescopic cylinder 23. The telescopic cylinder 23 is connected with the bracket 1.
The working principle according to embodiment 4 is: as shown in fig. 1-6, each raw material in the component a is fed into the corresponding material distributing groove 60 of the material distributing tray 6 from the feeding pipe 21 through the abdicating hole 20, the material distributing groove 60 is provided with a material dropping hole 61, and the material dropping hole 61 is a tapered hole, so that the raw material of the component a can conveniently enter the feeding groove 40 arranged on the stirring sheet 4 from the material dropping hole 61. Stirring vane 4 becomes the heliciform and is connected with annotating liquid pipe 3, annotates the external liquid pump of top surface that blending tank 2 was passed to the upper end of annotating liquid pipe 3, and it is intraductal that the liquid pump pours into B component solution into notes liquid, and the lower extreme of annotating liquid pipe 3 is connected with rotation motor 31, and rotation motor 31 can drive notes liquid pipe 3 and rotate, and stirring vane 4 is along with rotating simultaneously. The lateral wall of annotating liquid pipe 3 is provided with a plurality of outage 30, and outage 30 evenly distributed is between stirring piece 4 adjacent two-layer for can be even when filling the solution of B component contact and intensive mixing with A component raw and other materials. The rotating stirring sheet 4 is matched with the material guide block 5 arranged on the inner wall of the mixing barrel 2, so that the component A and the solution B are fully mixed and reacted, and the formed plastic is guaranteed to realize high thermal shock resistance. The lateral wall of mixing bucket 2 is provided with two connecting blocks, two connecting blocks and discharging pipe 7 are at same vertical plane, one of them connecting block with articulated with support 1, another connecting block below is connected with telescopic cylinder 23, telescopic cylinder 23's the action of contracting can make mixing bucket 2 slope, make the plastic material vibration in the mixing bucket 2, the mixture of messenger is abundant, telescopic cylinder 23 is when the minimum simultaneously, mixing bucket 2 conveniently will mix the plastic material of accomplishing and discharge from discharging pipe 7.
Claims (5)
1. A preparation method of a refractory plastic material with high thermal shock resistance is characterized in that the refractory plastic material comprises a component A and a component B, wherein,
the component A comprises the following components in parts by weight: 60-70 parts of corundum aggregate, 20-40 parts of corundum powder, 5-10 parts of mullite, 5-10 parts of cristobalite and 1-5 parts of plasticizer,
the component B is aluminum dihydrogen phosphate solution;
the steps are as follows,
s1, weighing and measuring an aluminum dihydrogen phosphate solution of the component B;
s2, weighing and measuring corundum aggregate, corundum powder, mullite, cristobalite and a plasticizer to obtain a component A;
s3, mixing the component A and the component B, putting the mixture into a mold, compacting the mixture into a blank and storing the blank;
the step S3 comprises a mixing mechanism used for mixing the component A and the component B, the mixing mechanism comprises a support (1) and a mixing barrel (2), the support (1) is connected with the mixing barrel (2), a liquid injection pipe (3) is connected in the mixing barrel (2) in a rotating mode, a stirring sheet (4) is sleeved on the liquid injection pipe (3), a plurality of guide blocks (5) are arranged on the inner wall of the mixing barrel (2), the guide blocks (5) are obliquely arranged at a certain angle with the horizontal plane, a liquid distribution disc (6) is sleeved above the liquid injection pipe (3), the liquid distribution disc (6) is connected with the stirring sheet (4), the liquid injection pipe (3) penetrates through the top surface of the mixing barrel (2) and is externally connected with a liquid injection pump, a discharge pipe (7) with a switch is connected below the mixing barrel (2), the stirring sheet (4) is spiral, a plurality of feed chutes (40) are arranged on the upper surface of the stirring sheet (4), a liquid distribution disc (6) is provided with a liquid distribution groove (60), a blanking groove (60) is provided with a blanking hole (61), a liquid injection hole (61) is arranged between the two layers of the liquid injection pipe (3), and a liquid discharge pipe (30) and a motor (31) is arranged between the two layers of the liquid injection pipe (3), rotate motor (31) and be connected with the outer bottom surface of blending barrel (2), the top surface of blending barrel (2) is provided with a plurality of holes of stepping down (20), hole of stepping down (20) are corresponding with branch silo (60), hole of stepping down (20) outside one end is connected with inlet pipe (21).
2. The method for preparing a refractory plastic material with high thermal shock resistance according to claim 1, wherein the weight ratio of the component A to the component B is 2-6.
3. The method as claimed in claim 1, wherein the aluminum dihydrogen phosphate solution has a density of 1.2-1.6g/ml.
4. The method as claimed in claim 1, wherein the plasticizer is trimethyl benzene phosphate.
5. The preparation method of the refractory plastic with high thermal shock resistance according to claim 1, characterized in that two connecting blocks are symmetrically arranged on the outer side wall of the mixing barrel (2), the connecting blocks and the discharge pipe (7) are in the same vertical plane, the lower surface of one connecting block is connected with a telescopic cylinder (23), and the telescopic cylinder (23) is connected with the bracket (1).
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| CN104671804B (en) * | 2015-01-16 | 2016-08-24 | 长兴正发热电耐火材料有限公司 | A kind of high-alumina refractory is moldable and preparation method thereof |
| CN206549651U (en) * | 2017-02-27 | 2017-10-13 | 四川射洪通用医疗器械有限公司 | A kind of fixed reactor |
| CN109422529B (en) * | 2017-08-24 | 2020-06-09 | 江南大学 | High-strength CFB boiler high-aluminum refractory plastic |
| CN110372340A (en) * | 2019-07-26 | 2019-10-25 | 马鞍山盛平新材料科技有限公司 | A kind of plastic refractory and preparation method thereof |
| CN210699773U (en) * | 2019-09-17 | 2020-06-09 | 山东瑞达有害生物防控有限公司 | A mix medicine device that is used for agriculture and forestry to fly to prevent that liquid medicine is prepared |
| CN110655410A (en) * | 2019-09-26 | 2020-01-07 | 宜兴市宏业保温工程有限公司 | Refractory plastic material for coking furnace door |
| CN111348928A (en) * | 2020-04-23 | 2020-06-30 | 无锡市南方耐材有限公司 | Filling fire clay for assembling tundish upper nozzle iron shell and preparation method thereof |
| CN112999900B (en) * | 2021-04-14 | 2022-10-04 | 广西交建工程检测咨询有限公司 | Modified asphalt floating stirring device |
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