CN101293739A - Method for preparing crystallizing glass for bottom roller of annealing oven - Google Patents
Method for preparing crystallizing glass for bottom roller of annealing oven Download PDFInfo
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- CN101293739A CN101293739A CNA200810048103XA CN200810048103A CN101293739A CN 101293739 A CN101293739 A CN 101293739A CN A200810048103X A CNA200810048103X A CN A200810048103XA CN 200810048103 A CN200810048103 A CN 200810048103A CN 101293739 A CN101293739 A CN 101293739A
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Abstract
The invention relates to a preparation method for microcrystalline glass used for a bottom roller of an annealing furnace and comprises the steps of mixing materials, founding glass, water hardening glass particles, crystallization treatment and baking. The raw materials in the procedure of mixing materials at least comprise spodumene and nucleating agent; wherein, the spodumene accounts for 60 to 95 percent of the gross weight of the raw materials and the nucleating agent accounts for 0.5 to 5 percent of the gross weight of the raw materials; the nucleating agent is one of titanium oxide and zircon sand or the compound of the titanium oxide and the zircon sand. The bottom roller made of the microcrystalline glass prepared by the method of the invention has the advantages of long service life, little consumption, which is not easy to form a tumor and can improve the surface quality of an operational steel band.
Description
Technical field
The present invention relates to devitrified glass, be specifically related to the preparation method of devitrified glass, especially for the preparation method of the devitrified glass of bottom roller of annealing oven.
Background technology
In Iron And Steel Industry, develop continuous annealing system,, produced demand thus the high quality furnace bottom roll to produce the high quality steel plate of a large amount of all sizes.Furnace bottom roll is one of topmost part of continuous annealing furnace, its working condition also is one of deciding factor that can annealing furnace ordinary production, this furnace bottom roll not only needs and very high resistance to wear and move the scratch resistance characteristic, also must eliminate the adhesion with ferric oxide simultaneously.Because the dross that the polishing scratch of roll surface and adhesion cause can have a strong impact on plate surface quality.
Performance requriements to furnace bottom roll: 1) heat-shock resistance preferably must be arranged, to prevent to heat up in process of production and coating shedding when lowering the temperature; 2) wear resistance preferably must be arranged, to guarantee long-term quantity-produced needs; 3) resistive connection knurl preferably must be arranged, prevent that the furnace bottom roll surface from producing the defective effect surface quality; 4) must possess good chemical stability, keep its use properties in various atmosphere, not fail.
Use furnace bottom roll at comparatively high temps in the past, generally under protective atmosphere, adopted graphite roller.Along with the development of high-performance ceramic coating, adopt the ceramics furnace bottom roller more and more at present.
At these requirements, the foreign study person has done research to some ceramic coating rollers, metal-ceramic coating roller and abradable coating roller, but the still difficult performance requriements that satisfies fully furnace bottom roll.
Present bottom roller of annealing oven has the carbon of employing cover roller, and its consumption is big, and work-ing life is short, and easily dross causes damage to the steel band that moves, and has had a strong impact on plate surface quality.The a large amount of consumption of carbon cover roller has also increased production cost.And ceramic compound coat bottom roller shows the ceramic composite coating heat-shock resistance, wear resistance is fairly good, but the dross phenomenon also appears in some cases, dross is even more serious under the moisture condition especially, showing has layer of metal pottery transition layer to be connected between metallic iron tumor and the ceramic coating, the about 200 μ m of sintering metal mixolimnion thickness, illustrate that metallic iron has infiltrated in the ceramic coating, tumor and roll surface pottery react, cause the iron tumor to be taken root and grow up.
In addition, to disclose a kind of be the low-expansion glass-ceramic of main raw material with low-grade kaolin to Chinese patent application numbers 90107409.8.Its batching expressivity is formed (weight %) and is: the three grades of kaolin 75-80 in Songyang, Zhejiang, magnesite 3-6, Wingdale 2-6, quartz sand 0-5, industrial lithium carbonate 7-10, zinc oxide 4-7, Sodium Silicofluoride 0.2-1.2, titanium oxide and zirconium white total amount 3-6.Its devitrified glass generally is used for conventional temperature environment, can not be used for the temperature condition of annealing furnace more than 1000 ℃.
Chinese patent application numbers 93115528.2 discloses with containing devitrified glass and the manufacture method that lithium minerals is a main material production, and its devitrified glass crystallization temperature is 450 ℃-1000 ℃, obviously can not be used for the temperature environment of annealing furnace more than 1000 ℃.
Summary of the invention
Technical problem to be solved by this invention is: a kind of preparation method who is used for the devitrified glass of bottom roller of annealing oven is provided, with the furnace bottom roll that the devitrified glass of this method preparation is produced, its long service life, consume few, be difficult for dross, can improve the surface quality of the steel band of operation.
The present invention solves the problems of the technologies described above the technical scheme that is adopted:
The preparation method who is used for the devitrified glass of bottom roller of annealing oven, it comprises the step that batch mixing, fusion cast glass, shrend glass pellet, crystallization processing are burnt till, the raw material in the batch mixing step comprises at least: triphane, nucleator;
Triphane accounts for 60～95% of raw material gross weight, and nucleator accounts for 0.5～5% of raw material gross weight;
Nucleator is one or both the combination in titanium oxide, the zircon sand.
In the such scheme, the raw material in the batch mixing step also comprises finings, and finings accounts for 0～1% of raw material gross weight;
Finings is one or both the combination in arsenic oxide arsenoxide, the weisspiessglanz.
In the such scheme, the raw material in the batch mixing step also comprises Quilonum Retard, and Quilonum Retard accounts for 1～6% of raw material gross weight.
In the such scheme, the raw material in the batch mixing step also comprises quartz sand, and quartz sand accounts for 0～10% of raw material gross weight.
In the such scheme, the raw material in the batch mixing step also comprises kaolin or/and aluminum oxide, and kaolin is or/and aluminum oxide accounts for 0～20% of raw material gross weight.
In the such scheme, the raw material in the batch mixing step also comprises slag, and slag accounts for 1～10% of raw material gross weight.
Devitrified glass preparation method of the present invention, be a kind of be the microcrystal glass material of principal crystalline phase by triphane, with the devitrified glass of this method preparation, its use temperature can reach 1100-1330 ℃, can be used for preparing the material of bottom roller of annealing oven fully, the furnace bottom roll that the devitrified glass of preparation is produced, prolong its work-ing life, consumes to reduce, and is difficult for dross, the surface quality of the steel band of operation be can improve, oxidation, reduction, damp and hot temperature environment are applicable to.
Compared with prior art, the advantage of the inventive method is:
The inventive method is the furnace bottom roll use temperature height of the microcrystal glass material preparation of principal crystalline phase with the triphane, can reach 1100-1330 ℃ (can be definite according to using needs), and the temperature range that is suitable for is bigger, and the performance requriements of material is higher.In the batching of microcrystal glass material, the natural lithium pyroxene is the main raw material that generates the triphane devitrified glass; Add Quilonum Retard and be to supplying in the natural lithium pyroxene Lithium Oxide 98min content low excessively, can work the homogenizing of founding in the parent glass process simultaneously; Quartz sand, kaolin, aluminum oxide are for preparing the raw material of triphane devitrified glass, should increase the volume of Quilonum Retard this moment, this combined ingredient can keep triphane devitrified glass performance index within the scope of the present invention when low and detrimental impurity content is higher in the lithium amount that contains of natural lithium pyroxene; Scoriaceous main component is the oxide compound of silicon, aluminium, calcium, magnesium etc., and the effect of regulating the devitrified glass performance is arranged, and the effect of nucleus agent is also arranged; Arsenic oxide arsenoxide, weisspiessglanz are the finings in the fusion cast glass process, join in the glass as the additive of discharging bubble; Titanium oxide, zircon sand are nucleator, and it can at first form nucleus (coring) in parent glass crystallization treating processes, are that crystal is grown up (crystallization) then, form devitrified glass at last.
Description of drawings
Fig. 1 is the process flow sheet of the inventive method embodiment
Embodiment
The present invention is used for the preparation method embodiment 1～11 of the devitrified glass of bottom roller of annealing oven, and it comprises the step that batch mixing, fusion cast glass, shrend glass pellet, crystallization processing are burnt till.
Each raw material in the batch mixing step and proportioning (each raw material accounts for the per-cent of raw material gross weight) see Table 1.
The step of fusion cast glass: carry out high-temperature fusion after raw material mixed and be liquid, through 〉=1500 ℃ of temperature insulations 3 hours.
The step of shrend glass pellet: the liquid of high-temperature fusion is entered formation glass pellet in the water.
Crystallization is handled the step burn till: levigate glass pellet to 300 order after drying is handled, and is pressed into the base substrate that needs shape, and base substrate enters in the High Temperature Furnaces Heating Apparatus crystallization and handles and be heated to 1200～1330 ℃ of constant temperature and promptly burnt till microcrystal glass material in 30～120 minutes.
Table 1:
The devitrified glass sample of the foregoing description preparation is placed the isothermal gradient furnace, cover sample with the ferric oxide powdered reagent, in gradient furnace under 1050 ℃ the condition, different positions feeds hydrogen and nitrogen respectively, and humidification atmosphere, inspection by sampling after 5 hours, the whole sintering of ferric oxide reagent are the black block shape, but with devitrified glass sample bonding, the bright and clean degree of devitrified glass specimen surface with go into the stokehold and be consistent.Scanning electron microscope analysis, devitrified glass sample do not react with the capping oxidation ferron in gradient furnace, and its sample face is clean, keep the original devitrified glass state of sample.X-ray diffraction is analyzed and the probe micro-area composition is analyzed devitrified glass sample crystal Stability Analysis of Structures, stable chemical performance.
Devitrified glass with the foregoing description preparation prepares bottom roller of annealing oven, and furnace bottom roll can not react with ferric oxide in 1050 ℃ of high temperature oxidations, reduction, damp and hot atmosphere, and the devitrified glass crystalline structure is stable, stable chemical performance.At 1100 ℃ of constant temperature folding strength＞10Mpa after 1 hour, furnace bottom roll places normal temperature tap water circulation to repeat to soak number of times from 1100 ℃ to surpass 28 times and crackle do not occur, remain intact.
Claims (6)
1, the preparation method who is used for the devitrified glass of bottom roller of annealing oven, it comprises the step that batch mixing, fusion cast glass, shrend glass pellet, crystallization processing are burnt till, it is characterized in that: the raw material in the batch mixing step comprises at least: triphane, nucleator;
Triphane accounts for 60～95% of raw material gross weight, and nucleator accounts for 0.5～5% of raw material gross weight;
Nucleator is one or both the combination in titanium oxide, the zircon sand.
2, the method for claim 1 is characterized in that: the raw material in the batch mixing step also comprises finings, and finings accounts for 0.1～1% of raw material gross weight;
Finings is one or both the combination in arsenic oxide arsenoxide, the weisspiessglanz.
3, method as claimed in claim 2 is characterized in that: the raw material in the batch mixing step also comprises Quilonum Retard, and Quilonum Retard accounts for 1～6% of raw material gross weight.
4, method as claimed in claim 2 is characterized in that: the raw material in the batch mixing step also comprises quartz sand, and quartz sand accounts for 0～10% of raw material gross weight.
5, method as claimed in claim 2 is characterized in that: the raw material in the batch mixing step also comprises kaolin or/and aluminum oxide, and kaolin is or/and aluminum oxide accounts for 0～20% of raw material gross weight.
6, method as claimed in claim 2 is characterized in that: the raw material in the batch mixing step also comprises slag, and slag accounts for 1～10% of raw material gross weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA200810048103XA CN101293739A (en) | 2008-06-20 | 2008-06-20 | Method for preparing crystallizing glass for bottom roller of annealing oven |
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| CNA200810048103XA CN101293739A (en) | 2008-06-20 | 2008-06-20 | Method for preparing crystallizing glass for bottom roller of annealing oven |
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| CNA200810048103XA Pending CN101293739A (en) | 2008-06-20 | 2008-06-20 | Method for preparing crystallizing glass for bottom roller of annealing oven |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104762445A (en) * | 2015-04-28 | 2015-07-08 | 艾伯纳工业炉(太仓)有限公司 | Furnace roller of hot forming roller bottom type heating furnace |
| CN112846151A (en) * | 2021-01-20 | 2021-05-28 | 苏州鸿翼卫蓝新材科技有限公司 | Preparation method of composite furnace roller |
-
2008
- 2008-06-20 CN CNA200810048103XA patent/CN101293739A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104762445A (en) * | 2015-04-28 | 2015-07-08 | 艾伯纳工业炉(太仓)有限公司 | Furnace roller of hot forming roller bottom type heating furnace |
| CN112846151A (en) * | 2021-01-20 | 2021-05-28 | 苏州鸿翼卫蓝新材科技有限公司 | Preparation method of composite furnace roller |
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Open date: 20081029 |