CN115947590A - RH insert tube castable and production method thereof - Google Patents
RH insert tube castable and production method thereof Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 142
- 239000010431 corundum Substances 0.000 claims abstract description 142
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 86
- 239000000463 material Substances 0.000 claims abstract description 65
- 239000002994 raw material Substances 0.000 claims abstract description 59
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 43
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000011049 filling Methods 0.000 claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 14
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 11
- 239000007767 bonding agent Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 29
- 230000035939 shock Effects 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000011819 refractory material Substances 0.000 abstract description 2
- 238000005266 casting Methods 0.000 description 40
- 230000008859 change Effects 0.000 description 15
- 238000010438 heat treatment Methods 0.000 description 15
- 238000003780 insertion Methods 0.000 description 11
- 230000037431 insertion Effects 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000007670 refining Methods 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 238000009628 steelmaking Methods 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 238000007872 degassing Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- -1 magnesium aluminate Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052596 spinel Inorganic materials 0.000 description 2
- 239000011029 spinel Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009489 vacuum treatment Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention belongs to the field of refractory materials, and discloses a pouring material for an RH insert tube and a production method thereof, wherein the method comprises the following steps: preparing raw materials by using black corundum, white corundum, activated alumina micro powder and calcined alumina micro powder as main raw materials and using 96.5 fused magnesia, 92 silica fume and water as bonding agents; uniformly mixing the raw materials, adding water, mixing for 15min, and filling into a mold; filling the raw materials into a mould, naturally drying for 24h, demoulding to obtain a blank, and baking the blank for 24h to obtain the castable for the formed RH insert tube. According to the invention, the castable is prepared by adopting black corundum, white corundum, 96.5 fused magnesia, activated alumina micropowder, calcined alumina micropowder and 94 silica fume as main raw materials, so that the service life of the insert tube can be greatly prolonged, and the castable has good thermal shock stability and compressive strength.
Description
Technical Field
The invention belongs to the field of refractory materials, and particularly relates to an RH insert tube castable and a production method thereof.
Background
The vacuum technology starts to be applied to steel making in 1952, and when people often generate slag emission in the casting process when silicon steel with silicon content of about 2% is produced, through various tests, the hydrogen and nitrogen in the molten steel are finally found to be the main reasons for generating slag emission and incapability of casting or generating waste products after rolling, and various vacuum refining technologies begin to appear along with the slag emission, such as a vacuum ingot casting method, a steel ladle dripping degassing method, a steel ladle degassing method and the like, so that an industrial-scale molten steel vacuum treatment method is initiated, particularly a steam jet pump appears, and the development of the vacuum steel making technology is accelerated. With the development and development of vacuum steelmaking technology, RH finally becomes the mainstream of vacuum steelmaking technology because of the advantages of short processing time, low cost, capability of processing a large amount of molten steel and the like, and with the emergence of full continuous casting workshops in the 70 s, RH is largely adopted by converter procedures because of the adoption of the technology of circulating molten steel in a vacuum tank so as to achieve the advantages of short processing time, high efficiency and capability of matching with converter continuous casting. The RH vacuum cycle degassing refining method was invented by German in 1959, wherein RH is the first letter of two manufacturers of Germany who adopted RH refining technology at that time.
The RH vacuum refining furnace of the vanadium steel extraction plant has extremely high temperature in the molten steel treatment process, the external material of the RH vacuum refining furnace insert tube generally adopts corundum castable in China, and from the field tracking statistical data, the damage form of the RH insert tube using the corundum castable mainly comprises the following steps: dropping the casting material of the insert pipe; the corundum castable of the plate blank inserting tube is seriously adhered with slag; the square billet insertion tube is seriously washed by corundum castable. Therefore, it is necessary to provide a casting material for the RH insertion tube, which improves the service life of the RH insertion tube, has good thermal shock stability and compressive strength, improves the refractory performance of the casting material for the RH insertion tube, and reduces the cost of the RH insertion tube.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a pouring material for an RH insert tube and a production method thereof, wherein black corundum, white corundum, 96.5 fused magnesia, activated alumina micropowder, calcined alumina micropowder and 94 silica fume are used as main raw materials to prepare the pouring material, so that the service life of the insert tube can be greatly prolonged by the pouring material, and the pouring material has good thermal shock stability and compressive strength
In order to achieve the purpose, the invention provides the following technical scheme:
a production method of an RH insert tube castable comprises the following steps:
preparing raw materials by using black corundum, white corundum, activated alumina micro powder and calcined alumina micro powder as main raw materials and using 96.5 fused magnesia, 92 silica fume and water as bonding agents;
uniformly mixing the raw materials, adding water, mixing for 15-20 min, and filling into a mold;
filling the raw materials into a mould, naturally drying for 24h, demoulding to obtain a blank, and baking the blank for 24h to obtain the castable for the formed RH insert tube.
Furthermore, the mass percentage of the black corundum to the sum of the mass of the black corundum and the mass of the white corundum is 25 to 65 percent;
further, the specifications of the black corundum and the white corundum include 10-5 mm, 5-3 mm, 3-1 mm and 1-0 mm.
Further, the refractory components of the corundum and the mass percentage of the corundum in the corundum are as follows: siO 2 2 ：0.024～0.055，Al 2 O 3 ：87.67～92.55，Fe 2 O 3 ：0.14～0.58，CaO：5.98～7.02，MgO；3.46～5.93，Na 2 O；0.12～0.19。
Further, the refractory components of the white corundum and the mass percentage of the refractory components in the white corundum are as follows: al (aluminum) 2 O 3 ：98.88～99.28，Fe 2 O 3 ：0～0.61，CaO：0.09～0.12，MgO；0.07～0.11，Na 2 O；0～0.13。
On the other hand, the invention also discloses an RH insert tube castable which is prepared by adopting the method.
Further, the refractory components of the corundum of the raw material of the pouring material of the RH insertion tube and the mass percentage thereof in the corundum are as follows: siO 2 2 ：0.024，Al 2 O 3 ：87.67，Fe 2 O 3 ：0.14，CaO：5.98，MgO：3.46，Na 2 O:0.12; the refractory components of white corundum as the raw material of the pouring material of the RH insert tube and the mass percentage of the white corundum are as follows: siO 2 2 ：0，Al 2 O 3 ：98.98，Fe 2 O 3 ：0.15，CaO：0.10，MgO：0.08，Na 2 O：0.03。
Further, the refractory components of the corundum of the raw material of the pouring material of the RH insertion tube and the mass percentage thereof in the corundum are as follows: siO 2 2 ：0.045，Al 2 O 3 ：90.11，Fe 2 O 3 ：0.36，CaO：6.50，MgO：4.70，Na 2 O:0.16; refractory components of corundum as a raw material of the pouring material of the RH insertion tube and the mass percentage of the corundum in the corundum are as follows: siO 2 2 ：0，Al 2 O 3 ：99.08，Fe 2 O 3 ：0.31，CaO：0.11，MgO：0.09，Na 2 O：0.07。
Further, the refractory components of the corundum of the raw material of the pouring material of the RH insertion tube and the mass percentage thereof in the corundum are as follows: siO 2 2 ：0.054，Al 2 O 3 ：91.67，Fe 2 O 3 ：0.54，CaO：6.98，MgO：5.46，Na 2 O:0.17; refractory components of corundum as a raw material of the pouring material of the RH insertion tube and the mass percentage of the corundum in the corundum are as follows: siO 2 2 ：0，Al 2 O 3 ：99.17，Fe 2 O 3 ：0.57，CaO：0.12，MgO：0.10，Na 2 O：0.10。
Further, the refractory components of the corundum of the raw material of the pouring material of the RH insertion tube and the mass percentage thereof in the corundum are as follows: siO 2 2 ：0.055，Al 2 O 3 ：92.55，Fe 2 O 3 ：0.58，CaO：7.02，MgO：5.93，Na 2 O:0.19; refractory components of corundum of raw materials of the RH insert tube castable and mass percentages of the refractory components in the corundum are as follows: siO 2 2 ：0，Al 2 O 3 ：99.28，Fe 2 O 3 ：0.61，CaO：0.12，MgO：0.11，Na 2 O：0.13。
The invention has the technical effects and advantages that:
the invention uses black corundum, white corundum, active alumina micro powder and calcined alumina micro powder as main raw materials, uses 96.5 electric melting magnesia, 92 silica fume and water as bonding agents to produce the pouring material of the RH insert tube, and uses the black corundum mainly comprising magnesium aluminate spinel, calcium hexaluminate and 2 CaO.2MgO.12Ala14 Al 2 O 3 The magnesium aluminate spinel has good slag erosion resistance and permeability, the calcium hexaluminate has good thermal shock stability and permeability resistance, and the calcium hexaluminate has good thermal shock stability and permeability resistance, so that the refractory performance and the service life of the insert tube are greatly improved, and meanwhile, the RH insert tube castable prepared by the method has good thermal shock stability and compressive strength.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
Fig. 1 is a flow chart of a production method of the castable for the RH insert tube according to the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Fig. 1 is a flowchart of a production method of an RH insert tube castable of the present invention, and as shown in fig. 1, the present invention provides a flowchart of a production method of an RH insert tube castable, including:
preparing raw materials by using black corundum, white corundum, activated alumina micro powder and calcined alumina micro powder as main raw materials and using 96.5 fused magnesia, 92 silica fume and water as bonding agents;
uniformly mixing the raw materials, adding water, mixing for 15-20 min, and filling into a mold;
and naturally drying the raw materials filled into the die for 24h, then demoulding to obtain a blank, and baking the blank for 24h to obtain the casting material for the formed RH insert tube.
Furthermore, the mass percentage of the black corundum to the sum of the masses of the black corundum and the white corundum is 25-65%;
furthermore, the specifications of the black corundum and the white corundum comprise 10-5 mm, 5-3 mm, 3-1 mm and 1-0 mm.
Further, the refractory components of the black corundum and the mass percentage of the refractory components in the black corundum are as follows: siO 2 2 ：0.024～0.055，Al 2 O 3 ：87.67～92.55，Fe 2 O 3 ：0.14～0.58，CaO：5.98～7.02，MgO；3.46～5.93，Na 2 O；0.12～0.19。
Further, the refractory components of the white corundum and the mass percentage of the refractory components in the white corundum are as follows: al (Al) 2 O 3 ：98.88～99.28，Fe 2 O 3 ：0～0.61，CaO：0.09～0.12，MgO；0.07～0.11，Na 2 O；0～0.13。
On the other hand, the invention also discloses an RH insert tube castable which is prepared by adopting the method.
Example 1
S1: white corundum, activated alumina micro powder and calcined alumina micro powder are used as main raw materials, 96.5 fused magnesia, 92 silica fume and water are used as bonding agents to prepare the raw materials, wherein the white corundum comprises the following refractory components in percentage by mass: siO 2 2 ：0，Al 2 O 3 ：98.88，Fe 2 O 3 ：0，CaO：0.09，MgO：0.07，Na 2 O：0。
S2: the raw materials are evenly mixed, and a proper amount of water is added to be mixed for 15-20 min and then the mixture is filled into a die.
S3: filling the raw materials into a mould, naturally drying for 24 hours, demoulding to obtain a blank, and baking the blank for 24 hours to prepare the casting material of the forming blank control RH insert tube.
Filling the raw materials into a mold, naturally drying for 24h to obtain a blank with the compressive strength of 10.7Mpa, and heating the blank at 110 ℃ for 24h to prepare a casting material of the forming RH insert tube with the compressive strength of 32.9Mpa; heating the casting material of the formed RH insert tube at 1100 ℃ for 3h, wherein the compressive strength is 41.4Mpa, and the linear change after burning is-0.2%; heating the casting material of the formed RH insert tube at 1350 ℃ for 3h, wherein the compressive strength is 54.4Mpa, and the linear change is +1.3% after the casting material is fired; the compressive strength of the casting material for the forming RH insert tube after being heated for 3h at 1600 ℃ is 77.7Mpa, and the linear change after being fired is +0.5%.
Example 2
S1: the method comprises the following steps of taking black corundum, white corundum, activated alumina micro powder and calcined alumina micro powder as main raw materials, and taking 96.5 fused magnesia, 92 silica fume and water as bonding agents to prepare the raw materials, wherein the black corundum with the thickness of 10-5 mm accounts for 25% of the total mass of the black corundum and the white corundum, the white corundum with the thickness of 10-5 mm accounts for 0%, and the refractory components and the mass percentages of the black corundum are as follows: siO 2 2 ：0.024，Al 2 O 3 ：87.67，Fe 2 O 3 ：0.14，CaO：5.98，MgO：3.46，Na 2 O:0.12, the white corundum comprises the following refractory components in percentage by mass: siO 2 2 ：0，Al 2 O 3 ：98.98，Fe 2 O 3 ：0.15，CaO：0.10，MgO：0.08，Na 2 O：0.03。
S2: the raw materials are evenly mixed, and a proper amount of water is added to be mixed for 15-20 min and then the mixture is filled into a die.
S3: filling the raw materials into a mould, naturally drying for 24 hours, demoulding to obtain a blank, and baking the blank for 24 hours to prepare the casting material for the forming RH insert tube.
Filling the raw materials into a mold, naturally drying for 24h to obtain a blank with the compressive strength of 3.5Mpa, and heating the blank at 110 ℃ for 24h to obtain a casting material of the forming RH insert tube with the compressive strength of 4.5Mpa; heating the casting material of the formed RH insert tube at 1100 ℃ for 3h, wherein the compressive strength is 60.1Mpa, and the linear change after burning is-0.02%; heating the casting material of the formed RH insert tube at 1350 ℃ for 3h, wherein the compressive strength is 92.9Mpa, and the linear change is +1.1% after the casting material is fired; the compressive strength of the casting material for the forming RH insert tube after being heated for 3h at 1600 ℃ is 104.5Mpa, and the linear change after being fired is +0.4%.
Example 3
S1: the preparation method comprises the following steps of taking black corundum, white corundum, activated alumina micro powder and calcined alumina micro powder as main raw materials, and using 96.5 fused magnesia, 92 silica fume and water as bonding agents to prepare the raw materials, wherein the black corundum with the thickness of 10-5 mm accounts for 25% of the sum of the masses of the black corundum and the white corundum, the white corundum with the thickness of 10-5 mm accounts for 10% of the sum of the masses of the black corundum and the white corundum, the black corundum with the thickness of 0.5-3 mm accounts for 10% of the sum of the masses of the black corundum and the white corundum, the white corundum with the thickness of 5-3 mm accounts for 0%, and the refractory components and the mass percentages of the black corundum are as follows: siO 2 2 ：0.045，Al 2 O 3 ：90.11，Fe 2 O 3 ：0.36，CaO：6.50，MgO：4.70，Na 2 O:0.16, the white corundum comprises the following refractory components in percentage by mass: siO 2 2 ：0，Al 2 O 3 ：99.08，Fe 2 O 3 ：0.31，CaO：0.11，MgO：0.09，Na 2 O：0.07。
S2: the raw materials are evenly mixed, and a proper amount of water is added to be mixed for 15-20 min and then the mixture is filled into a die.
S3: filling the raw materials into a die, naturally drying for 24 hours, demoulding to obtain a blank, and baking the blank for 24 hours to prepare the casting material for the formed RH insert tube.
Filling the raw materials into a mould, naturally drying for 24h to obtain a blank with the compressive strength of 3.7Mpa, and heating the blank at 110 ℃ for 24h to obtain a casting material of the formed RH insert tube with the compressive strength of 4.9Mpa; heating the casting material of the formed RH insert tube at 1100 ℃ for 3h, wherein the compressive strength is 62.1Mpa, and the linear change after the casting material is burnt is-0.03%; heating the casting material of the formed RH insert tube at 1350 ℃ for 3h, wherein the compressive strength is 92.7Mpa, and the linear change is +0.7% after the casting material is fired; the compressive strength of the casting material of the formed RH insert tube after being heated for 3 hours at 1600 ℃ is 107.5Mpa, and the linear change after being fired is +0.3 percent.
Example 4
S1: the preparation method comprises the following steps of taking black corundum, white corundum, activated alumina micro powder and calcined alumina micro powder as main raw materials, and using 96.5 fused magnesia, 92 silica fume and water as bonding agents to prepare the raw materials, wherein the black corundum with the thickness of 10-5 mm accounts for 25% of the mass sum of the black corundum and the white corundum, the white corundum with the thickness of 10-5 mm accounts for 10% of the mass sum of the black corundum and the white corundum, the black corundum with the thickness of 5-3 mm accounts for 10% of the mass sum of the black corundum and the white corundum, the white corundum with the thickness of 0, 3-1 mm accounts for 10% of the mass sum of the black corundum and the white corundum, the white corundum with the thickness of 3-1 mm accounts for 0, and the refractory components and the mass percentages of the black corundum are as follows: siO 2 2 ：0.054，Al 2 O 3 ：91.67，Fe 2 O 3 ：0.54，CaO：6.98，MgO：5.46，Na 2 O:0.17, the white corundum comprises the following refractory components in percentage by mass: siO 2 2 ：0，Al 2 O 3 ：99.17，Fe 2 O 3 ：0.57，CaO：0.12，MgO：0.10，Na 2 O：0.10。
S2: the raw materials are evenly mixed, and a proper amount of water is added to be mixed for 15-20 min and then the mixture is filled into a die.
S3: filling the raw materials into a die, naturally drying for 24 hours, demoulding to obtain a blank, and baking the blank for 24 hours to prepare the casting material for the formed RH insert tube.
Filling the raw materials into a mould, naturally drying for 24h to obtain a blank with the compressive strength of 3.5Mpa, and heating the blank at 110 ℃ for 24h to obtain a casting material of the formed RH insert tube with the compressive strength of 4.5Mpa; heating the casting material of the formed RH insert tube at 1100 ℃ for 3h, wherein the compressive strength is 60.7Mpa, and the linear change is +0.2% after the casting material is fired; heating the casting material of the formed RH insert tube at 1350 ℃ for 3h, wherein the compressive strength is 103.9Mpa, and the linear change is +0.3% after the casting material is fired; the compression strength of the casting material of the molded RH insert tube after being heated for 3 hours at 1600 ℃ is 127.5Mpa, and the linear change after being fired is +0.2 percent.
Example 5
S1: taking black corundum, white corundum, active alumina micro powder and calcined alumina micro powder as main materialsThe raw materials are prepared by using 96.5 electrically fused magnesia, 92 silicon ash and water as bonding agents, wherein the black corundum with the thickness of 10-5 mm accounts for 25% of the sum of the masses of the black corundum and the white corundum, the white corundum with the thickness of 10-5 mm accounts for 10% of the sum of the masses of the black corundum and the white corundum, the white corundum with the thickness of 5-3 mm accounts for 10% of the sum of the masses of the black corundum and the white corundum, the white corundum with the thickness of 3-1 mm accounts for 18% of the sum of the masses of the black corundum and the white corundum, the white corundum with the thickness of 1-0 mm accounts for 0%, and the refractory components and the mass percentages of the black corundum are as follows: siO 2 2 ：0.055，Al 2 O 3 ：92.55，Fe 2 O 3 ：0.58，CaO：7.02，MgO：5.93，Na 2 O:0.19, the white corundum comprises the following refractory components in percentage by mass: siO 2 2 ：0，Al 2 O 3 ：99.28，Fe 2 O 3 ：0.61，CaO：0.12，MgO：0.11，Na 2 O：0.13。
S2: the raw materials are evenly mixed, added with a proper amount of water and mixed for 15-20 min, and then filled into a mold.
S3: filling the raw materials into a die, naturally drying for 24 hours, demoulding to obtain a blank, and baking the blank for 24 hours to prepare the casting material for the formed RH insert tube.
Filling the raw materials into a mould, naturally drying for 24h to obtain a blank with the compressive strength of 4.5Mpa, and heating the demoulded blank at 110 ℃ for 24h to obtain a casting material of the formed RH insert tube with the compressive strength of 5.5Mpa; heating the casting material of the formed RH insert tube at 1100 ℃ for 3h, wherein the compressive strength is 72.1Mpa, and the linear change after the casting material is burnt is-0.01%; heating the casting material of the formed RH insert tube at 1350 ℃ for 3h, wherein the compressive strength is 103.9Mpa, and the linear change is +0.5% after the casting material is fired; the compressive strength of the casting material for the forming RH insert tube after being heated for 3h at 1600 ℃ is 107.5Mpa, and the linear change after being fired is +0.4%.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent substitutions and improvements to part of the technical features of the foregoing embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for producing a castable material for an RH insert tube, characterized in that the method comprises the steps of:
preparing raw materials by using black corundum, white corundum, activated alumina micro powder and calcined alumina micro powder as main raw materials and using 96.5 fused magnesia, 92 silica fume and water as bonding agents;
uniformly mixing the raw materials, adding water, mixing for 15-20 min, and filling into a mold;
filling the raw materials into a mould, naturally drying for 24h, demoulding to obtain a blank, and baking the blank for 24h to obtain the castable for the formed RH insert tube.
2. A production method of pouring material for RH insert tubes according to claim 1,
the mass percentage of the black corundum to the total mass of the black corundum and the white corundum is 25-65%.
3. A method of producing a pouring material for RH insert tubes as claimed in claim 2,
the specifications of the black corundum and the white corundum comprise 10-5 mm, 5-3 mm, 3-1 mm and 1-0 mm.
4. A production method of a castable for RH insert tubes according to any one of claims 1 to 3, characterized in that:
the refractory components of the corundum and the mass percentage of the refractory components in the corundum are as follows: siO 2 2 ：0.024～0.055，Al 2 O 3 ：87.67～92.55，Fe 2 O 3 ：0.14～0.58，CaO：5.98～7.02，MgO；3.46～5.93，Na 2 O；0.12～0.19。
5. A method of producing a pouring material for RH insert tubes according to any one of claims 1 to 3, characterized in that,
the white corundum comprises the following refractory components in percentage by mass: al (Al) 2 O 3 ：98.88～99.28，Fe 2 O 3 ：0～0.61，CaO：0.09～0.12，MgO；0.07～0.11，Na 2 O；0～0.13。
6. An RH insert tube castable characterized in that it is produced by the method as set forth in any one of claims 1 to 5.
7. An RH insert tube castable material according to claim 6, wherein:
the refractory components of the corundum of the raw material of the pouring material of the RH inserting pipe and the mass percentage of the corundum in the corundum are as follows: siO 2 2 ：0.024，Al 2 O 3 ：87.67，Fe 2 O 3 ：0.14，CaO：5.98，MgO：3.46，Na 2 O：0.12；
The raw materials of the RH insert tube castable comprise the following refractory components in percentage by mass: siO 2 2 ：0，Al 2 O 3 ：98.98，Fe 2 O 3 ：0.15，CaO：0.10，MgO：0.08，Na 2 O：0.03。
8. An RH insert tube castable material according to claim 6, wherein:
the refractory components of the corundum of the raw material of the pouring material of the RH inserting pipe and the mass percentage of the corundum in the corundum are as follows: siO 2 2 ：0.045，Al 2 O 3 ：90.11，Fe 2 O 3 ：0.36，CaO：6.50，MgO：4.70，Na 2 O：0.16；
The refractory components of the corundum of the raw materials of the RH insert tube castable and the mass percentage of the refractory components in the corundum are as follows: siO 2 2 ：0，Al 2 O 3 ：99.08，Fe 2 O 3 ：0.31，CaO：0.11，MgO：0.09，Na 2 O：0.07。
9. An RH insert tube castable material according to claim 6, wherein:
the refractory components of the corundum of the raw material of the pouring material of the RH inserting pipe and the mass percentage of the corundum in the corundum are as follows: siO 2 2 ：0.054，Al 2 O 3 ：91.67，Fe 2 O 3 ：0.54，CaO：6.98，MgO：5.46，Na 2 O：0.17；
The refractory components of the corundum of the raw material of the pouring material of the RH inserting pipe and the mass percentage of the corundum in the corundum are as follows: siO 2 2 ：0，Al 2 O 3 ：99.17，Fe 2 O 3 ：0.57，CaO：0.12，MgO：0.10，Na 2 O：0.10。
10. A castable material for RH insert tubes according to claim 6, wherein:
the refractory components of the corundum of the raw material of the pouring material of the RH inserting pipe and the mass percentage of the corundum in the corundum are as follows: siO 2 2 ：0.055，Al 2 O 3 ：92.55，Fe 2 O 3 ：0.58，CaO：7.02，MgO：5.93，Na 2 O：0.19；
The refractory components of the corundum of the raw material of the pouring material of the RH inserting pipe and the mass percentage of the corundum in the corundum are as follows: siO 2 2 ：0，Al 2 O 3 ：99.28，Fe 2 O 3 ：0.61，CaO：0.12，MgO：0.11，Na 2 O：0.13。
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| CN116589287A (en) * | 2023-01-08 | 2023-08-15 | 无锡市南方耐材有限公司 | Low-cost and long-service-life sliding plate brick and preparation method thereof |
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