CN1237562A - Anti-oxidizing agent for carbon-contained fireproof material - Google Patents

Anti-oxidizing agent for carbon-contained fireproof material Download PDF

Info

Publication number
CN1237562A
CN1237562A CN 99107800 CN99107800A CN1237562A CN 1237562 A CN1237562 A CN 1237562A CN 99107800 CN99107800 CN 99107800 CN 99107800 A CN99107800 A CN 99107800A CN 1237562 A CN1237562 A CN 1237562A
Authority
CN
China
Prior art keywords
powder
carbon containing
zinc
containing refractory
silicon
Prior art date
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
Application number
CN 99107800
Other languages
Chinese (zh)
Inventor
田守信
刘山林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baoshan Iron and Steel Co Ltd
Original Assignee
Baoshan Iron and Steel Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Baoshan Iron and Steel Co Ltd filed Critical Baoshan Iron and Steel Co Ltd
Priority to CN 99107800 priority Critical patent/CN1237562A/en
Publication of CN1237562A publication Critical patent/CN1237562A/en
Pending legal-status Critical Current

Links

Landscapes

  • Compositions Of Oxide Ceramics (AREA)

Abstract

The antioxidant of carbonaceous refractory material is formed from (wt%) 0.15-10% of zinc dust or zinc dust and at least one kind of aluminium powder, magnesium powder, silica flour, rankinite powder, silicon carbide powder, boron carbide powder, magnalium powder and silicon nitride, in which the zinc dust content is greater than or equal to 0.15%, and its grain size is less than 0.5 mm. Said invention can raise the oxidation resistance of the refractory material of magnesia carbon brick, etc., and can inhibite the formation of decarbonization layer, and can prolong the service life of smelting furnace lining, and can reduce loss of refractory material and steel-smelting cost.

Description

The antioxidant of carbon containing refractory
The present invention relates to a kind of antioxidant of carbonaceous refractory materials, particularly a kind of carbon containing refractory.
Magnesia carbon brick, aluminum-carbon brick, Al2O3MgOC Bricks, carbon containing refractories such as magnesia-calcium-carbon brick are generally as electric arc furnace, converter, the furnace lining of metallurgical furnaces such as ladle, the one of the main reasons of these refractory corrosions is oxidations at high temperature, promptly before these metallurgical furnaces use, all to carry out long baker, furnace lining contacts with air for a long time, cause the furnace lining oxidation to form thicker zone of oxidation, in the baker process, to form the Decarburized layer of about 30mm as converter, this Decarburized layer is no intensity, porous does not have carbon-coating, when containing molten steel, can be fallen by molten steel scouring, the general every refining one heat steel of converter furnace lining will be etched 0.2~0.6mm, therefore owing to making, the baker oxidation reduces nearly 100 heats the work-ing life of furnace lining, the non-Sheng molten steel time of these metallurgical furnaces in operation process has had a strong impact on the work-ing life of carbon containing refractory because the furnace lining oxidation also can cause the quick erosion when containing steel simultaneously.In order to improve the work-ing life of carbon containing refractory, carried out big quantity research in the prior art, normally in carbon containing refractory, add strong reducible agents such as metallic aluminium powder, magnesium aluminum-alloy powder, silica flour and carborundum powder, thereby improved the oxidation-resistance of carbon containing refractory.For example to disclose a kind of " not burning magnesia carbon brick " be at graphite 5~50% to the clear 61-215250 of Japanese Patent Application Laid-Open, 2~10% 1 kinds of the refractory materials addings or the phosphoric acid salt additive more than 2 kinds of electrosmelted magnesite clinker 50~95% are polyphenoils, but the reaction of the wedding agent carbon of this antioxidant and carbon containing refractory descends the mechanical behavior under high temperature of refractory materials.
The objective of the invention is to obtain a kind of antioxidant of carbon containing refractory, can improve its oxidation-resistance and the not influence of the mechanical behavior under high temperature of refractory materials.
For achieving the above object, the technical solution of the present invention's proposition is:
A kind of antioxidant of carbon containing refractory, by zinc, or at least a composition in zinc and aluminium, magnesium, silicon, silicon calcium powder, silicon carbide, norbide, magnesium aluminum-alloy powder, the silicon nitride powder.
Above-mentioned raw materials is Powdered.
The granularity of zinc powder is less than 0.5mm.
The granularity of zinc powder is less than 0.15mm.
The zinc powder of carbon containing refractory 0.15~10% (weight), the perhaps mixture of at least a composition in the zinc of carbon containing refractory 0.15~10% and aluminium, magnesium, silicon, silicon calcium powder, silicon carbide, norbide, magnesium aluminum-alloy powder, the silicon nitride powder, wherein zinc powder 〉=0.15%.
Account for the zinc powder of carbon containing refractory 0.15~4%, perhaps account for the mixture of at least a composition in the zinc of carbon containing refractory 0.15~6% and aluminium, magnesium, silicon, silicon calcium powder, silicon carbide, norbide, magnesium aluminum-alloy powder, the silicon nitride powder, wherein zinc powder 〉=0.15%.
Below the present invention is done and be described in further detail.
The antioxidant of the carbon containing refractory that the present invention obtains, its key problem in technology are that the mixture that adopts metal zinc or zinc and other component to form is an antioxidant, and wherein each components contents and the mechanism of action are:
Zinc powder: 0.15~10% (weight, as follows), because zinc can be under the metallurgical furnace storing temperature, be gasificated into the gas of high partial pressures, zinc is not very strong to the avidity of oxygen simultaneously, this vapor diffusion that can make it is to Decarburized layer, and because it has certain avidity to oxygen, this will make at Decarburized layer and be oxidized to ZnO; Zinc oxide is dystectic oxide compound, so it does not reduce the anti-corrode performance of material, and the price comparison of zinc is low.
The mixture of at least a composition in zinc and aluminium, magnesium, silicon, silicon calcium powder, silicon carbide, norbide, magnesium aluminum-alloy powder, the silicon nitride powder: 0.15~10%, zinc powder 〉=0.15% wherein.Add acting as of other component: when further guaranteeing its oxidation-resistance, improve the mechanical behavior under high temperature of refractory materials, wherein aluminium powder, silica flour, silicon calcium powder, magnesium aluminum-alloy powder also can improve its resistance to fouling.
Optimal components of the present invention is: the zinc powder of carbon containing refractory 0.15~4% (weight), the perhaps mixture of at least a composition in the zinc of carbon containing refractory 0.15~6% and aluminium, magnesium, silicon, silicon calcium powder, silicon carbide, norbide, magnesium aluminum-alloy powder, the silicon nitride powder, wherein zinc powder 〉=0.15%.
Prior art is normally added strong reducible agents such as metallic aluminium powder, magnesium aluminum-alloy powder, silica flour and carborundum powder in carbon containing refractory, thereby has improved the oxidation-resistance of carbon containing refractory.Mechanism that it is generally acknowledged these antioxidants is: compares with carbon, and the easier oxidation of these additives, and generate more volume after the oxidation, stop up pore, thereby improved the oxidation-resistance of carbon containing refractory.But this oxidation-resistance mechanism can not be explained CaO and water in air reaction generation comparatively large vol Ca (OH) in the magnesia-calcium brick 2The time, the void content that not only can not reduce product increases the fact of void content on the contrary.The present invention has studied its oxidation-resistance mechanism, and the result shows: in carbon-containing bed, these additives and carbon effect generate the very low Al of dividing potential drop 2O, SiO, Mg gas, these strong reducing gass will oxidation generate high temperature solid-state MgO, Al to external diffusion at the Decarburized layer than strong oxidizing property atmosphere 2O 3, SiO 2, these oxide compounds are deposited in from gas phase on the gas passage, have stopped up gas passage, have improved the oxidation-resistance of carbon containing refractory.Because, Al 2The dividing potential drop of O, SiO is very low, thus metallic aluminium powder, silica flour, carborundum powder to be used for the antioxidant effect of carbon containing refractory unsatisfactory.For the magnesium powder, though the evaporation dividing potential drop of Mg is very high, the avidity of it and oxygen is strong especially again, does not become gas toward contact and just has been oxidized to MgO, and the oxidation-resistance of carbon containing refractory of therefore adding MAGNESIUM METAL is also undesirable.
For the carbon containing refractory that adds boron glass, make the apparent porosity reduction and oxidation-protective effect is preferably arranged though in carbon containing refractory, become liquid phase, because it is the flux of material of main part, the anti-corrode of material is obviously descended.
For the antioxidant that obtains to guarantee the oxidation-resistance of carbon containing refractory and do not reduce anti-corrode performance, the present invention is by making the research of the antioxidation mechanism of carbon containing refractory to additive, and fusing point, the boiling point of all metals and oxide compound thereof compared analysis, they and C, CO, CO 2And O 2The thermodynamics free energy of reaction is analyzed, and finds out the antioxidant that metallic zinc is only carbon containing refractory.
Introduce embodiments of the invention below in conjunction with effect.
Embodiment 1
Electrosmelted magnesite clinker with 88%, 10% natural flaky graphite, 2% metal zinc (granularity is less than 0.5mm), 5% modifying asphalt resin system bonded proportioning are carried out batch mixing, it is 36mm, high 36mm base substrate that mixed material becomes diameter with the pressure forming of 240MPa, this base substrate carries out the oxidation-resistance simultaneous test with the magnesia carbon brick that does not add zinc powder after 200 ℃ of solidification treatment.
Test method is: said sample is placed in the resistance furnace, with 260 liters/speed at one hour rating bubbling air, starts resistance furnace and heat up in stove, be warmed up to 1000 ℃ in 1 hour, be incubated blowing out after 2 hours.Continued blowing air 3 hours after the blowing out, at this moment furnace temperature is reduced to 500 ℃.Stop blowing air and take out sample, after the cooling, sample is cut from the centre, measure oxidated layer thickness.The result shows, the magnesium carbon sample zone of oxidation that adds zinc powder is 0.6mm only, and the magnesium carbon sample zone of oxidation of not adding zinc powder is 4.7mm.Because the storing temperature of metallurgical furnace such as ladle is about 1000 ℃, so, in magnesia carbon brick, add metal zinc and form big Decarburized layer when preventing to toast fabulous effect is arranged.
Embodiment 2
Prescription by table 1 carries out batch mixing, and it is 50mm, high 50mm base substrate that mixed material becomes diameter with the pressure forming of 200MPa.This base substrate carries out the oxidation-resistance simultaneous test after 200 ℃ of solidification treatment.
Test method is: said sample is placed in the resistance furnace, with the logical people's air of 240 liters/speed at one hour rating, starts resistance furnace and heat up in stove, be warmed up to 900 ℃ in 1 hour, be incubated blowing out after 4.5 hours.Continued blowing air 3 hours after the blowing out, at this moment furnace temperature is reduced to 500 ℃.Stop blowing air, naturally cool to room temperature, and take out sample, after the cooling, sample is cut from the centre, with the carbon-containing bed diameter of kind of calliper, calculating oxidation area percent.The results are shown in Table 1, the result shows that the magnesium carbon sample that adds zinc powder is at non-metallic aluminium powder, al-mg powder, norbide and the silica flour of being often better than of 900 ℃ oxidation-resistance.Therefore, in carbon containing refractories such as magnesia carbon brick, add the antioxidant zinc powder, can significantly reduce the practical decarburized depth of the carbon containing refractory of 900~1000 ℃ of oxidations, will significantly improve the work-ing life of carbon containing refractory.
Compared with prior art, the antioxidant that obtains of the present invention can the establishment oxidation and decarbonization The formation of layer can improve the non-oxidizability of the refractory materials such as magnesia carbon brick, makes the carbon containing fire proofed wood The oxidation rate of material is reduced to original below 20%, the decarburization that causes during the elimination baking Layer significantly improves service life, minimizing refractory wear and the reduction steel-making of metallurgical furnace lining Cost with carbon containing refractory.
Table 1
Numbering Fused magnesite Additive The thermosetting phenolic resin bond Graphite Oxidation area (%) Oxidated layer thickness (mm)
 1     90   Al:3      4.5     10     28.7     3.97
 2     90   Zn:2      4.5     10     1.12     0.14
 3     90   AlMg:4      4.5     10     18.8     2.52
 4     90   B 4C:2Si:2      4.5     10     3.2     0.41

Claims (6)

1. the antioxidant of a carbon containing refractory is characterized in that: by zinc, or at least a composition in zinc and aluminium, magnesium, silicon, silicon calcium powder, silicon carbide, norbide, magnesium aluminum-alloy powder, the silicon nitride powder.
2. the antioxidant of carbon containing refractory according to claim 1, it is characterized in that: described raw material is Powdered.
3. the antioxidant of carbon containing refractory according to claim 1 and 2, it is characterized in that: the granularity of described zinc powder is less than 0.5mm.
4. the antioxidant of carbon containing refractory according to claim 1 and 2, its feature is levied and is: the granularity of described zinc powder is less than 0.15mm.
5. the antioxidant of carbon containing refractory according to claim 1, it is characterized in that: the zinc powder that accounts for carbon containing refractory 0.15~10% (weight), the perhaps mixture of at least a composition in the zinc of carbon containing refractory 0.15~10% and aluminium, magnesium, silicon, silicon calcium powder, silicon carbide, norbide, magnesium aluminum-alloy powder, the silicon nitride powder, wherein zinc powder 〉=0.15%.
6. the antioxidant of carbon containing refractory according to claim 1, it is characterized in that: the zinc powder that accounts for carbon containing refractory 0.15~4%, perhaps account for the mixture of at least a composition in the zinc of carbon containing refractory 0.15~6% and aluminium, magnesium, silicon, silicon calcium powder, silicon carbide, norbide, magnesium aluminum-alloy powder, the silicon nitride powder, wherein zinc powder 〉=0.15%.
CN 99107800 1999-02-25 1999-05-31 Anti-oxidizing agent for carbon-contained fireproof material Pending CN1237562A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 99107800 CN1237562A (en) 1999-02-25 1999-05-31 Anti-oxidizing agent for carbon-contained fireproof material

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN99100838.3 1999-02-25
CN99100838 1999-02-25
CN 99107800 CN1237562A (en) 1999-02-25 1999-05-31 Anti-oxidizing agent for carbon-contained fireproof material

Publications (1)

Publication Number Publication Date
CN1237562A true CN1237562A (en) 1999-12-08

Family

ID=25744985

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 99107800 Pending CN1237562A (en) 1999-02-25 1999-05-31 Anti-oxidizing agent for carbon-contained fireproof material

Country Status (1)

Country Link
CN (1) CN1237562A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100366582C (en) * 2006-04-27 2008-02-06 鞍山科技大学 Magnesia brick containing antioxidant C-TiN composite powder and method for preparing the same
CN102173837A (en) * 2011-01-27 2011-09-07 无锡成博科技发展有限公司 Lubricating coating of high-temperature oxidation resistant sliding plate and preparation process thereof
CN102180685A (en) * 2011-03-10 2011-09-14 濮阳濮耐高温材料(集团)股份有限公司 Air-permeable brick for converter
CN102329142A (en) * 2011-07-22 2012-01-25 郑州京华耐火材料实业有限公司 Aluminum silicon carbide carbon brick and preparation method thereof
CN102408244A (en) * 2011-08-24 2012-04-11 江苏苏嘉集团新材料有限公司 Processing method of carbon-containing refractory product
CN102463347A (en) * 2010-11-16 2012-05-23 河南黄河旋风股份有限公司 Composite deoxidizing agent
CN102649645A (en) * 2011-02-23 2012-08-29 武汉武钢维苏威高级陶瓷有限公司 Refractory material
CN102757250A (en) * 2012-08-02 2012-10-31 江苏苏嘉集团新材料有限公司 Antioxidant used for refractory material
CN106810274A (en) * 2015-12-01 2017-06-09 镇江市润州金山金属粉末厂 A kind of carbon zinc refractory material
CN111875357A (en) * 2020-07-30 2020-11-03 海城市金福锋科技有限公司 Anti-oxidation high-fracture-resistance hearth castable and production method thereof
CN112062586A (en) * 2020-09-24 2020-12-11 山东柯信新材料有限公司 Production method of environment-friendly carbon-containing brick
CN112500130A (en) * 2020-12-07 2021-03-16 海城利尔麦格西塔材料有限公司 Silicon-calcium-barium complex phase combined silicon carbide magnesia-carbon brick and manufacturing method thereof

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100366582C (en) * 2006-04-27 2008-02-06 鞍山科技大学 Magnesia brick containing antioxidant C-TiN composite powder and method for preparing the same
CN102463347A (en) * 2010-11-16 2012-05-23 河南黄河旋风股份有限公司 Composite deoxidizing agent
CN102173837A (en) * 2011-01-27 2011-09-07 无锡成博科技发展有限公司 Lubricating coating of high-temperature oxidation resistant sliding plate and preparation process thereof
CN102173837B (en) * 2011-01-27 2013-06-19 无锡成博科技发展有限公司 Lubricating coating of high-temperature oxidation resistant sliding plate and preparation process thereof
CN102649645A (en) * 2011-02-23 2012-08-29 武汉武钢维苏威高级陶瓷有限公司 Refractory material
CN102180685A (en) * 2011-03-10 2011-09-14 濮阳濮耐高温材料(集团)股份有限公司 Air-permeable brick for converter
CN102329142A (en) * 2011-07-22 2012-01-25 郑州京华耐火材料实业有限公司 Aluminum silicon carbide carbon brick and preparation method thereof
CN102408244A (en) * 2011-08-24 2012-04-11 江苏苏嘉集团新材料有限公司 Processing method of carbon-containing refractory product
CN102408244B (en) * 2011-08-24 2012-12-19 江苏苏嘉集团新材料有限公司 Processing method of carbon-containing refractory product
CN102757250A (en) * 2012-08-02 2012-10-31 江苏苏嘉集团新材料有限公司 Antioxidant used for refractory material
CN106810274A (en) * 2015-12-01 2017-06-09 镇江市润州金山金属粉末厂 A kind of carbon zinc refractory material
CN111875357A (en) * 2020-07-30 2020-11-03 海城市金福锋科技有限公司 Anti-oxidation high-fracture-resistance hearth castable and production method thereof
CN112062586A (en) * 2020-09-24 2020-12-11 山东柯信新材料有限公司 Production method of environment-friendly carbon-containing brick
CN112500130A (en) * 2020-12-07 2021-03-16 海城利尔麦格西塔材料有限公司 Silicon-calcium-barium complex phase combined silicon carbide magnesia-carbon brick and manufacturing method thereof

Similar Documents

Publication Publication Date Title
CN1237562A (en) Anti-oxidizing agent for carbon-contained fireproof material
EP0370677B2 (en) Magnesite-carbon refractories
CN111644582B (en) Tundish covering agent for titanium-containing steel and preparation method and application thereof
CN113943145A (en) Unburned magnesia carbon brick and preparation method and application thereof
CN1045281C (en) Silicon nitride combined with silicon carbide refractory material for pouring ladle gate
CN112645698A (en) Aluminum titanium silicon carbide composite refractory castable for iron-making blast furnace
JPH0753600B2 (en) Molten steel container
CN105347812A (en) Fireproof material antioxidant
CN114716256B (en) Refractory material for smelting rare earth steel and method for improving rare earth yield
CA1220348A (en) Thermal reduction process for production of magnesium
JP7389352B2 (en) Spinel-magnesia-carbon bricks for vacuum degassing equipment and vacuum degassing equipment
CN112321284A (en) Aluminum-titanium composite refractory castable for iron-making blast furnace
KR930009349B1 (en) Refractory brick of mgo-c matrix
WO1984000158A1 (en) Magnesia-carbon-silicon carbide refractory
EP0147338B1 (en) Method of obtaining a refractory mass based on electrofused zirconium for metal and alloy induction-melting furnaces
CN1631844A (en) Zircon carbon brick
JP2968542B2 (en) Refractory
RU2167123C2 (en) Spinel-periclasocarbon refractory
CN113860890A (en) CaC for refining furnace2-C refractory material and preparation process thereof
JP2516187B2 (en) Refractory for molten steel container
CN112759405A (en) Aluminum titanium silicon carbide composite refractory shaped product for iron-making blast furnace
JPH0125368B2 (en)
JP5573535B2 (en) MgO-C refractories
JPH05132354A (en) Unburned magnesia-carbon brick
JPS6048467B2 (en) Alumina-svinel-carbon refractories

Legal Events

Date Code Title Description
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C06 Publication
PB01 Publication
ASS Succession or assignment of patent right

Owner name: BAOSHAN IRON & STEEL CO., LTD.

Free format text: FORMER OWNER: BAOSHAN STEEL GROUP IRON AND STEEL CO LTD

Effective date: 20010913

C41 Transfer of patent application or patent right or utility model
TA01 Transfer of patent application right

Effective date of registration: 20010913

Applicant after: Baoshan Iron & Steel Co., Ltd.

Applicant before: Baoshan Iron & Steel (Group) Co., Ltd.

C12 Rejection of a patent application after its publication
RJ01 Rejection of invention patent application after publication