CN101804456A - Carbon-free unburned brick and production method thereof - Google Patents
Carbon-free unburned brick and production method thereof Download PDFInfo
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- CN101804456A CN101804456A CN 201010141774 CN201010141774A CN101804456A CN 101804456 A CN101804456 A CN 101804456A CN 201010141774 CN201010141774 CN 201010141774 CN 201010141774 A CN201010141774 A CN 201010141774A CN 101804456 A CN101804456 A CN 101804456A
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Abstract
The invention relates to a carbon-free unburned brick and a production method thereof, belonging to the field of inorganic materials. The invention aims to provide the carbon-free unburned brick with longer service life. The carbon-free unburned brick is prepared by the following raw materials in parts by weight: 60-80 parts of refractory aggregates, 13-32 parts of refractory powder, 7-15 parts of active alpha-Al2O3 powder and a proper quantity of bonding agents, wherein the refractory aggregates are corundum; the refractory powder is the mixture of 3-7 parts of magnesia powder and 10-25 parts of corundum powder; and the bonding agents are MgCl2 solution. Compared with the existing products, the carbon-free unburned brick has higher compression strength and bulk density, reduces the porosity and improves the integral use stability and corrosion resistance to slag of the products, thereby prolonging the service lives of the products.
Description
Technical field
The present invention relates to carbon-free unburned brick and production method thereof, belong to field of inorganic materials.
Background technology
Ladle is transhipment and a refining vessel important in the STEELMAKING PRODUCTION process.Along with the progress (mainly being refining) of smelting technique and the increase of output of steel, steel mill's an urgent demand improves the service life of ladle liner.Initial ladle adopts the inner lining material of high-alumina brick as ladle, because slag is a basic slag, high-alumina brick is an acid refractory, and slag is serious to the erosion of high-alumina brick, causes service life of liner of ladle on the low side.In order to improve the service life of ladle liner, ladle liner develops to the integrated masonry direction, and slag lining adopts magnesia carbon brick, and the following aluminium-magnesia carbon brick that adopts of slag line adopts at the bottom of the ladle and waters material feeding.Owing to contain carbon in magnesia carbon brick and the aluminium-magnesia carbon brick, can improve the slag penetration resistance of refractory brick preferably, corrosion resistance is improved, and is favourable to the service life of improving the ladle working layer, but magnesia carbon brick and aluminium-magnesia carbon brick in use mainly have the following disadvantages:
1, the thermal conductivity factor of carbon is big, causes the thermal conductivity factor of magnesia carbon brick and aluminium-magnesia carbon brick to increase, and the heat loss of ladle increases, and molten steel temperature drop increases, and is unfavorable to subsequent smelting technology.
2, adopt magnesia carbon brick and the aluminium-magnesia carbon brick working lining as ladle, carbon can be diffused in the molten steel and go, and influences the quality of molten steel.
3, adopt magnesia carbon brick and aluminium-magnesia carbon brick to make the working lining of ladle, use the later stage to ladle, along with the oxidation of carbon, magnesia carbon brick and aluminium-magnesia carbon brick can be owing to short texture disintegrate, and be restricted service life.
Application number is that 02117370.2 patent application discloses a kind of prefabricated carbon-free block of work-lining for steel-ladle, but there is following deficiency in this prefabricated carbon-free block of work-lining for steel-ladle: (1) this prefabricated section bulk density is less than normal, and resistance to overturning is used in influence, and antistrip performance is poor.(2) this prefabricated section porosity is bigger than normal, influences slag resistance.
Summary of the invention
Technical problem to be solved by this invention provides higher carbon-free unburned brick in a kind of service life.
Carbon-free unburned brick of the present invention is prepared from by the following weight proportion raw material:
60～80 parts of refractory aggregates, 13～32 parts of refractory powders, active alpha-Al
2O
37～15 parts in powder, an amount of bond (effect of bond mainly is to make each raw material gluing, and an amount of bond promptly refers to can compression moulding get final product after each raw material mixes); Wherein, described refractory aggregate is a corundum; Described refractory powder is the mixture of magnesia powder and schmigel, and magnesia powder is 3～7 parts, and schmigel is 10～25 parts; Described bond is MgCl
2Solution.
Refractory aggregate among the present invention mainly plays skeleton function, decision physical mechanics and high temperature serviceability.Refractory aggregate among the present invention selects corundum to be because corundum has the ability of excellent chemical stability and the effect of opposing reducing agent.Corundum can be divided into alundum and electro-corundum two big kinds, can be divided into white fused alumina, alumina corundum, brown corundum, fused alumina zirconia and pink fused alumina etc. again, can select different types of corundum as refractory aggregate according to concrete needs.Wherein, better for the performance that makes carbon-free unburned brick of the present invention, the maximum particle size of above-mentioned refractory aggregate is preferably 4～6mm, and the grain composition of refractory aggregate is preferably 3～4 grades.The maximum particle size of refractory aggregate is selected 4～6mm, and grain composition is selected 3～4 grades can make the carbon-free unburned brick of production have higher bulk density and than low-porosity, improve anti-molten steel scouring performance of carbon-free unburned brick of the present invention and anti-scour property.According to concrete needs, can select corresponding refractory aggregate maximum particle size and grain composition grade, maximum particle size as: refractory aggregate is selected 5mm, and grain composition is selected 4 grades, then Pei Liao grain composition can for: 5～3mm, 3～2mm, 2～0mm,＜0.088mm.
Refractory powder among the present invention plays a part to connect or glued refractory aggregate under high temperature action, makes it to obtain high-temperature physics mechanics and serviceability.Refractory powder among the present invention is the mixture of schmigel and magnesia powder, connects or the better effects if of glued refractory aggregate in order to make, the granularity of the refractory powder among the present invention is preferred≤and 0.088mm.According to concrete needs, can select the schmigel of different grades, along with the raising of corundum grade and purity, the also corresponding raising of the performance of carbon-free unburned brick of the present invention.Magnesia powder is divided into the magnesite clinker powder of electrofusion magnesia powder, according to concrete needs, can select corresponding magnesia powder.
Active alpha-Al among the present invention
2O
3Powder, its reactivity is stronger, can generate aluminum-spinel with the magnesia powder reaction under lower temperature, to improve the high-temperature behavior of no carbon brick.In order to improve the performance of carbon-free unburned brick of the present invention, described active alpha-Al
2O
3The granularity of powder is preferred≤10 μ m.
Bond among the present invention can make refractory aggregate and powder gluing.Bond of the present invention is preferably saturated MgCl
2Solution, saturated MgCl
2The caking property of solution is strong, can better improve the depanning intensity of moulding adobe, can also better improve the elevated temperature strength of adobe simultaneously.
The present invention also provides the method for producing above-mentioned carbon-free unburned brick, and this method comprises the steps:
A, batching: take by weighing each raw material by following weight proportion:
60～80 parts of refractory aggregates, 13～32 parts of refractory powders, active alpha-Al
2O
37～15 parts in powder, an amount of bond; Wherein, described refractory aggregate is a corundum; Described refractory powder is the mixture of magnesia powder and schmigel, and magnesia powder is 3～7 parts, and schmigel is 10～25 parts; Described bond is MgCl
2Solution;
B, mixing: with the raw material blending of a step;
C, moulding: the material forming behind the b step mixing;
D, oven dry: the no carbon brick after the moulding progressively is warming up to 220～230 ℃ of drying 8～12h then in the down dry 20～26h of normal temperature, and cooling gets product.
Wherein, the maximum particle size of the described refractory aggregate of above-mentioned a step is preferably 4～6mm, and the grain composition of refractory aggregate is preferably 3～4 grades; The granularity of described refractory powder is preferred≤0.088mm; Described active alpha-Al
2O
3The granularity of powder is preferred≤10 μ m; Described bond is preferably saturated MgCl
2Solution (adds 3～5 parts of saturated MgCl by weight ratio during batching
2Solution gets final product).
Wherein, if above-mentioned each raw material of b step adds simultaneously, need just can mix for a long time, in order to save mixing time, to enhance productivity, when mixing, each raw material of above-mentioned b step, adds 13～32 parts of refractory powders, active alpha-Al then earlier with 60～80 parts of refractory aggregates and 1～2 part of bond mixing
2O
37～15 parts in powder and remaining bond mixing.
Wherein, during no carbon brick in the above-mentioned d step behind the intensification drying and moulding,, then may cause the fragment of brick cracking, influence the fragment of brick quality if programming rate is too fast; If programming rate is slow excessively, then can reduce production efficiency.Be warming up to 220～230 ℃ programming rate from normal temperature in the above-mentioned d step and be preferably 10～15 ℃/h, so both can guarantee that end product quality is higher, can guarantee that again production efficiency is better.
Carbon-free unburned brick of the present invention is compared existing product, and its compressive resistance is higher, and bulk density is bigger, and has reduced the porosity, and the whole stability in use and the anti-scour property of product are improved, thus the service life of having improved product.
The specific embodiment
Below in conjunction with embodiment the specific embodiment of the present invention is further described, does not therefore limit the present invention among the described scope of embodiments.
Embodiment 1 production carbon-free unburned brick of the present invention
1, weighing
Proportioning by table 1 takes by weighing each material.Wherein, brown corundum, α-Al
2O
3The raw material sources of micro mist, magnesite clinker powder are the commercially available prod, and saturated magnesium chloride solution is preparation voluntarily.
Each material proportion of table 1
2, mixing (adopt and grind the method for making mixing)
To clean out the defective material that mud grinds in the machine before producing, impurity, caking must not be arranged.Every stone roller pug 600～1200kg should guarantee to grind even, no raw material piece.The feeding sequence that pug grinds material is: aggregate elder generation mixed grind 5 minutes, added 1/3 bond and mixed grind then 5 minutes, and add α-Al again
2O
3Micro mist, magnesite clinker powder and remaining 2/3 bond and mixed grind 8 minutes, last discharging.
3, moulding
Adopt the moulding of 630T friction press, during moulding, light earlier back is heavy, guarantees close specification requirement, the no slabbing of conforming to of body of no carbon brick.
4, drying
No carbon brick after the moulding is after under the normal temperature dry one day, go into tunnel drying oven and be warming up to 220～230 ℃ of dry 9h, wherein, it is 10～15 ℃/h that tunnel drying oven is warming up to 220～230 ℃ programming rate from normal temperature, behind the dried no carbon brick kiln discharge, obtain finished product through cooling off naturally.
Embodiment 2 productions carbon-free unburned brick of the present invention
1, weighing
Proportioning by table 2 takes by weighing each material.Wherein, white fused alumina, α-Al
2O
3The raw material sources of micro mist, magnesite clinker powder are the commercially available prod, and saturated magnesium chloride solution is preparation voluntarily.
Each material proportion of table 2
2, mixing (adopt and grind the method for making mixing)
To clean out the defective material that mud grinds in the machine before producing, impurity, caking must not be arranged.Every stone roller pug 600～1200kg should guarantee to grind even, no raw material piece.The feeding sequence that pug grinds material is: aggregate elder generation mixed grind 5 minutes, added 1/3 bond and mixed grind then 5 minutes, and add α-Al again
2O
3Micro mist, magnesite clinker powder and remaining 2/3 bond and mixed grind 8 minutes, last discharging.
3, moulding
Adopt the moulding of 630T friction press, during moulding, light earlier back is heavy, guarantees close specification requirement, the no slabbing of conforming to of body of no carbon brick.
4, drying
No carbon brick after the moulding is after under the normal temperature dry one day, go into tunnel drying oven and be warming up to 220～230 ℃ of dry 13h, wherein, it is 10～15 ℃/h that tunnel drying oven is warming up to 220～230 ℃ programming rate from normal temperature, behind the dried no carbon brick kiln discharge, obtain finished product through cooling off naturally.
Test the performance measurement of routine carbon-free unburned brick of the present invention
1, is that method in 02117370.2 the patent application is produced prefabricated carbon-free block of work-lining for steel-ladle by application number, and measures the performance of the carbon-free unburned brick of the present invention that prefabricated carbon-free block of work-lining for steel-ladle and embodiment 1,2 produce respectively, the results are shown in Table 3.
Table 3 performance measurement result
As can be seen from Table 3, the compressive resistance of product of the present invention and bulk density are higher than the product of 02117370.2 patent application, and the porosity is lower than the product of 02117370.2 patent application.The whole stability in use and the anti-scour property of product of the present invention are better, thereby make the service life of product higher.
2, measure service life
The carbon-free unburned brick that the embodiment of institute 1,2 produces is on probation through climbing 200 tons of refining ladle of steel, and be 135 product service life of embodiment 1, and be 150 product service life of embodiment 2.
Claims (9)
1. carbon-free unburned brick is characterized in that being prepared from by the following weight proportion raw material: 60～80 parts of refractory aggregates, 13～32 parts of refractory powders, active alpha-Al
2O
37～15 parts in powder, an amount of bond; Wherein, described refractory aggregate is a corundum; Described refractory powder is the mixture of magnesia powder and schmigel, and magnesia powder is 3～7 parts, and schmigel is 10～25 parts; Described bond is MgCl
2Solution.
2. carbon-free unburned brick according to claim 1 is characterized in that: the maximum particle size of described refractory aggregate is 4～6mm, and the grain composition of refractory aggregate is 3～4 grades.
3. carbon-free unburned brick according to claim 1 is characterized in that: the granularity≤0.088mm of described refractory powder.
4. carbon-free unburned brick according to claim 1 is characterized in that: described active alpha-Al
2O
3The granularity of powder≤10 μ m.
5. according to each described carbon-free unburned brick of claim 1～4, it is characterized in that: described bond is saturated MgCl
2Solution.
6. produce the method for carbon-free unburned brick, it is characterized in that comprising the steps:
A, batching: take by weighing each raw material by following weight proportion:
60～80 parts of refractory aggregates, 13～32 parts of refractory powders, active alpha-Al
2O
37～15 parts in powder, an amount of bond; Wherein, described refractory aggregate is a corundum; Described refractory powder is the mixture of magnesia powder and schmigel, and magnesia powder is 3～7 parts, and schmigel is 10～25 parts; Described bond is MgCl
2Solution;
B, mixing: with the raw material blending of a step;
C, moulding: the material forming behind the b step mixing;
D, oven dry: the no carbon brick after the moulding progressively is warming up to 220～230 ℃ of drying 8～12h then in the down dry 20～26h of normal temperature, and cooling gets product.
7. the method for production carbon-free unburned brick according to claim 6 is characterized in that: the maximum particle size of the described refractory aggregate of a step is 4～6mm, and the grain composition of refractory aggregate is 3～4 grades; Granularity≤the 0.088mm of described refractory powder; Described active alpha-Al
2O
3The granularity of powder≤10 μ m; Described bond is saturated MgCl
2Solution.
8. the method for production carbon-free unburned brick according to claim 6 is characterized in that: earlier with 60～80 parts of refractory aggregates and 1～2 part of bond mixing, add 13～32 parts of refractory powders, active alpha-Al then when each raw material of b step mixes
2O
37～15 parts in powder and remaining bond mixing.
9. the method for production carbon-free unburned brick according to claim 6 is characterized in that: being warming up to 220～230 ℃ programming rate from normal temperature in the described d step is 10～15 ℃/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010141774 CN101804456A (en) | 2010-04-08 | 2010-04-08 | Carbon-free unburned brick and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010141774 CN101804456A (en) | 2010-04-08 | 2010-04-08 | Carbon-free unburned brick and production method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101804456A true CN101804456A (en) | 2010-08-18 |
Family
ID=42606504
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010141774 Pending CN101804456A (en) | 2010-04-08 | 2010-04-08 | Carbon-free unburned brick and production method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102795869A (en) * | 2012-09-03 | 2012-11-28 | 营口青花耐火材料股份有限公司 | Unburned carbon-free brick for generating MgAlON/beta-Sialon complex phase in situ under smelting condition |
| CN103252487A (en) * | 2013-05-27 | 2013-08-21 | 德清县钢友耐火材料有限公司 | Novel steel ladle |
| CN103464734A (en) * | 2013-08-27 | 2013-12-25 | 海城市东和泰迪冶金炉材有限公司 | Safe steel ladle lining and building method thereof |
| CN106747509A (en) * | 2016-12-13 | 2017-05-31 | 山西昊业新材料开发有限公司 | A kind of ladle wall carbon-free pressed machine brick and preparation method thereof |
| CN106810218A (en) * | 2016-12-28 | 2017-06-09 | 江苏苏嘉集团新材料有限公司 | Carbon-free ladle brick of high intensity and preparation method thereof |
| CN108715555A (en) * | 2018-07-05 | 2018-10-30 | 郑州振东科技有限公司 | A kind of permanent layer light fire brick and preparation method thereof |
| CN111960835A (en) * | 2020-08-28 | 2020-11-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Pointing material for reducing oxidation of electric furnace magnesia carbon brick and preparation and use methods thereof |
| CN112974785A (en) * | 2021-02-08 | 2021-06-18 | 北京首钢股份有限公司 | Steel ladle and steel ladle building method |
| CN114180954A (en) * | 2022-02-15 | 2022-03-15 | 北京利尔高温材料股份有限公司 | Environment-friendly low-carbon aluminum-magnesium spinel brick and preparation method thereof |
| CN117303919A (en) * | 2023-10-19 | 2023-12-29 | 郑州金河源耐火材料有限公司 | Unfired chrome corundum refractory brick and preparation method thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102795869B (en) * | 2012-09-03 | 2013-12-04 | 营口青花耐火材料股份有限公司 | Unburned carbon-free brick for generating MgAlON/beta-Sialon complex phase in situ under smelting condition |
| CN102795869A (en) * | 2012-09-03 | 2012-11-28 | 营口青花耐火材料股份有限公司 | Unburned carbon-free brick for generating MgAlON/beta-Sialon complex phase in situ under smelting condition |
| CN103252487A (en) * | 2013-05-27 | 2013-08-21 | 德清县钢友耐火材料有限公司 | Novel steel ladle |
| CN103464734A (en) * | 2013-08-27 | 2013-12-25 | 海城市东和泰迪冶金炉材有限公司 | Safe steel ladle lining and building method thereof |
| CN106747509B (en) * | 2016-12-13 | 2019-09-03 | 山西昊业新材料开发有限公司 | A kind of ladle wall carbon-free pressed machine brick and preparation method thereof |
| CN106747509A (en) * | 2016-12-13 | 2017-05-31 | 山西昊业新材料开发有限公司 | A kind of ladle wall carbon-free pressed machine brick and preparation method thereof |
| CN106810218A (en) * | 2016-12-28 | 2017-06-09 | 江苏苏嘉集团新材料有限公司 | Carbon-free ladle brick of high intensity and preparation method thereof |
| CN108715555A (en) * | 2018-07-05 | 2018-10-30 | 郑州振东科技有限公司 | A kind of permanent layer light fire brick and preparation method thereof |
| CN111960835A (en) * | 2020-08-28 | 2020-11-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Pointing material for reducing oxidation of electric furnace magnesia carbon brick and preparation and use methods thereof |
| CN111960835B (en) * | 2020-08-28 | 2022-05-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Pointing material for reducing oxidation of electric furnace magnesia carbon brick and preparation and use methods thereof |
| CN112974785A (en) * | 2021-02-08 | 2021-06-18 | 北京首钢股份有限公司 | Steel ladle and steel ladle building method |
| CN114180954A (en) * | 2022-02-15 | 2022-03-15 | 北京利尔高温材料股份有限公司 | Environment-friendly low-carbon aluminum-magnesium spinel brick and preparation method thereof |
| CN114180954B (en) * | 2022-02-15 | 2022-05-17 | 北京利尔高温材料股份有限公司 | Environment-friendly low-carbon aluminum-magnesium spinel brick and preparation method thereof |
| CN117303919A (en) * | 2023-10-19 | 2023-12-29 | 郑州金河源耐火材料有限公司 | Unfired chrome corundum refractory brick and preparation method thereof |
| CN117303919B (en) * | 2023-10-19 | 2024-03-08 | 郑州金河源耐火材料有限公司 | Unfired chrome corundum refractory brick and preparation method thereof |
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Application publication date: 20100818 |