CN105152668B - A kind of RH liners chromium-free brick and preparation method thereof - Google Patents
A kind of RH liners chromium-free brick and preparation method thereof Download PDFInfo
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- CN105152668B CN105152668B CN201510672465.6A CN201510672465A CN105152668B CN 105152668 B CN105152668 B CN 105152668B CN 201510672465 A CN201510672465 A CN 201510672465A CN 105152668 B CN105152668 B CN 105152668B
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Abstract
The present invention relates to refractory material and preparation method thereof, and in particular to a kind of RH liners chromium-free brick and preparation method thereof.A kind of RH liners chromium-free brick of the present invention, is prepared by following parts by weight of component：15~18 parts of fused magnesite coarse granule；20~25 parts of fused magnesite fine grained；20~25 parts of fused magnesite fine powder；2~5 parts of light-magnesite powder；3~6 parts of alpha-aluminium oxide micro mist；5~10 parts of almag；10~15 parts of electric smelting spinel powder；10~15 parts of AZS；3~5 parts of liquid phenolic resin.RH liner chromium-free bricks prepared by the present invention, not only production method is simple, also has the characteristics that anti-slag is invaded, elevated temperature strength is big, consistency is higher, and raw material is free of chromium, environmentally friendly, and it integrates performance and is better than magnesite-chrome brick.
Description
Technical field
The present invention relates to refractory material and preparation method thereof, and in particular to a kind of RH liners chromium-free brick and its preparation side
Method.
Background technology
Nineteen fifty-seven Thyssen iron company invention vacuum circulation degassing-RH methods, subsequent the seventies and 80 years
Generation, Japan successively develop RH-OB methods, RH-KTB methods and RH-PB methods, constantly improve RH refining function.With market pair
The purity requirements more and more higher of steel, while RH essences are configured with to the increase of high-quality steel demand, domestic and international most steel mills
Refine device.RH liners generally use magnesite-chrome brick, but Cr (III) generates Cr with CaO reactions in slag in high temperature oxidative atmosphere
(VI) environmental pollution, is caused.As environmental requirement is more and more tighter, it is necessary to develop chromium-free brick and substitute magnesite-chrome brick, eliminate pollution of chromium, push away
Move green Iron ＆ Steel Development.
Application No. " CN201310552471.9 ", entitled " a kind of RH vacuum drying ovens inner lining refractory and its system
Preparation Method and RH vacuum drying ovens ", discloses a kind of RH vacuum drying ovens inner lining refractory and preparation method thereof and RH vacuum drying ovens.The liner
Refractory material by fused magnesite, treated Delanium, antioxidant, phenolic resin ratio dispensing by weight, through mixed grind,
Pressure forming, Technology for Heating Processing obtain RH vacuum drying oven inner lining refractories.The patent is related to a kind of low carbon magnesia carbon brick, carburetting be present
Risk.
Application No. " CN201110091063.9 ", it is entitled " a kind of with high corrosion resistance, high-heat resistance shock resistant
RH stoves magnesium zirconia block and its production technology ", disclose it is a kind of with high corrosion resistance, high-heat resistance shock resistant RH stove magnesium zirconia blocks and
Its production technology, the brick mass percent are MgO 76-90%, ZrO25-21%, 1680-1840 DEG C of firing temperature.Technique is：
Magnesia and the preprocessed synthesis magnesium zircon sand of zirconium oxide；Synthesis magnesium zircon sand, fused magnesite are broken into 5-3mm, 3-1mm, 1-0mm
Grain；In proportion by particulate material, the magnesia of 150-200 mesh and magnesium zircon sand powder, 200-250 mesh zirconium oxides powder, addition of C aO and
Y2O3, the strength homogenizing mixing of binding agent spent pulping liquor are compressing；120 DEG C of baking 24-72h；Heating is protected at 1680-1840 DEG C
Warm 3-5h is burnt till.Sintering temperature is 1680-1840 DEG C in the patent, high energy consumption.
Application No. " CN201110234230.0 ", entitled " RH refining inner lining of furnace bricks and preparation method thereof ",
Disclose a kind of key component and percentage by weight is：Granularity is 0.1~5 millimeter of magnesia aggregate：55~70%, granularity ＜
0.1 millimeter of matrix：30~45%, the additional sol binder for accounting for above-mentioned raw materials total weight percent 2~5%；Preparation process：
The magnesia aggregate that granularity is 0.1~5 millimeter is mixed with sol binder；Add 0.1 millimeter of granularity ＜ matrix and mixing；Into
Type；Baking；Fire；Insulation；Room temperature is naturally cooled to, is then come out of the stove stand-by.A kind of MgO-ZrO of the patented invention2- CaO bricks,
It is favorably improved anti-slag to invade and permeate, but CaO aquations is present.
Application No. " CN201310475475.1 ", entitled " a kind of magnesia-spinel brick and preparation method thereof " is public
Opened a kind of magnesia-spinel brick, by the magnesia of 60~80 parts by weight, the dicalcium sand of 10~20 parts by weight, 10~20 parts by weight it is pre-
Batch mixing and the resin of 2~5 parts by weight are formed；The premix includes：Magnesium-rich spinel, activated alumina and metallic silicon power；Institute
Stating magnesia includes the different magnesia of two or more particle diameter.The patent introduces metallic silicon power, develops one kind and contains metal powder
The magnesia-spinel brick at end, consistency is improved using post forming.
Application No. " CN201110124748.9 ", entitled " a kind of non-burning aluminum magnesia spinel brick ", discloses one
Kind non-burning aluminum magnesia spinel brick, the percent mass proportioning of its each component are：Corundum 50~80%, aluminum-spinel 5~30%, magnesium
Emery dust 2~5%, alumina powder 3~10%, surplus are simple substance silica flour, metallic aluminium powder, at least one of boron carbide powder, described
The each component of non-burning aluminum magnesia spinel brick is combined by an additional bonding agent.The patent be related to a kind of silicon metal powder, aluminium powder,
B4C aluminum-spinel unburned brick.
Application No. " CN201110392586.7 ", entitled " refining furnace furnace lining combines impervious point crystalline substance with Ultramicro-powder
Stone brick and preparation method ", it is good to disclose excellent a kind of Chrome-free, high-temperature behavior, thermal shock resistance and wearability, and slag-resistant infiltration is molten
Excellent performance is lost, the refining furnace of service life length combines impervious spinel brick and preparation method with Ultramicro-powder.Main idiosome material used
Expect for electric smelting aluminium riched spinel 62-66 parts, spinelle 19-23 parts of pre-synthesis, alumina powder 13-17 parts；Additional bonding agent
The ratio of the addition gross weight that accounts for main idiosome material respectively be：Bonding agent 3-5%；High-pressure molding, high-temperature activation sintering and
Into.The patent utilization superfine powder combines, and high temperature burns till spinelle-Al2O3 bricks, and cost is higher.
Application No. " CN201110289991.6 ", entitled " refining furnace furnace lining does not burn magnesium with metal composite antiseepage
Spinel brick and preparation method thereof ", discloses that a kind of Chrome-free, high-temperature behavior are excellent, the porosity is low, corrosion resistance is strong, thermal shock is steady
Qualitative and wearability is good, and the excellent refining furnace furnace lining of slag-resistant permeance property does not burn magnesia-spinel brick with metal composite antiseepage.This
The main blank of material of invention is a kind of or several by magnesite clinker (content of MgO >=94%) and fused magnesite (content of MgO is >=94%)
Kind, add spinelle (electric smelting and sintering spinelle one or more, the Al of pre-synthesis2O3Content 60-90%), 1-6 kind metals
Thing one or more are used as additive, and organic matter is as bonding agent.The patent introduces metal Ti, Si, Zn etc., and formation is impermeable not
Burn magnesia-spinel brick.
In summary patent understands that additive is added in a manner of powder mostly in the prior art, is contacted with bulky grain not enough
Fully, so as to which sintering process is difficult to form high strength bond between the two.
The content of the invention
In order to solve the above problems, first technical problem to be solved by this invention is to provide a kind of intensity, consistency
The higher RH liner chromium-free bricks of performance are invaded with anti-slag.
A kind of RH liners chromium-free brick of the present invention, is prepared by following parts by weight of component：
Wherein, 5mm≤fused magnesite coarse granule particle diameter≤8mm, 3mm≤fused magnesite fine grained particle diameter ＜ 5mm, 1mm≤
Fused magnesite fine powder particle diameter ＜ 3mm.
Further, as preferred technical scheme, a kind of RH liners chromium-free brick described above, by following parts by weight
Component is prepared：
A kind of RH liners chromium-free brick described above, MgO ＞ 97wt%, CaO ＜ 1wt%, SiO wherein in fused magnesite2
＜ 1wt%；Light-magnesite powder particle diameter ＜ 0.074mm, and wherein MgO >=80wt%, CaO≤2wt%, SiO2≤ 2wt%；Aluminium
Al ＞ 98wt%, 2wt%≤Mg≤4wt% in magnesium alloy；Electric smelting spinel powder particle diameter ＜ 0.074mm；0.074mm≤electric smelting zirconium
Corundum particle diameter≤1mm.
Second technical problem to be solved by this invention is to provide a kind of method for preparing above-mentioned RH liners chromium-free brick.
The method for preparing RH liners chromium-free brick described above, comprises the following steps：
A, fused magnesite coarse granule, fused magnesite fine grained and fused magnesite fine powder are mixed, are preheated to more than 550 DEG C,
Obtain magnesia compound；
B, under vacuum or argon gas atmosphere, after almag is melted at 700~720 DEG C, it is added to magnesia mixing
In material, mix, untill whole magnesia particle surfaces apply and are covered with thin layer of aluminum magnesium alloy；
C, AZS, electric smelting spinel powder, Alpha-alumina micro mist and light-magnesite powder are sequentially added, mixes 40
~60min, liquid phenolic resin, then mixed 35~45min are added, obtains RH liner chromium-free brick compounds；
D, the RH liners that step c obtains are pressed into RH liner chromium-free bricks with chromium-free brick compound under 600MPa pressure
Adobe, after 100~120 DEG C of dry 20~36h, 10~15h is heat-treated at 200~300 DEG C, produces RH liner chromium-free bricks.
Further, the method for preparing RH liner chromium-free bricks described above, in order to reduce workload, save the time and into
This, while cause mixed material mixing evenly, the mortar mixer preferably used in 80~150rpm of rotating speed is mixed in a steps
Middle batch mixing 10min.
The method for preparing RH liner chromium-free bricks described above, in Step d RH liners with Chrome-free brick adobe preferably through 110
DEG C dry 24h.
The present invention is formed in situ by selectively applying layer of metal or metal alloy in large particle surface after high-temperature oxydation
Reaction, reach the purpose for improving intensity and consistency, at the same time introduce zirconium-containing material raising anti-slag and invade performance.Compared to existing skill
Art, not only production method is simple for RH liners chromium-free brick prepared by the present invention, is also invaded with anti-slag, elevated temperature strength is big, fine and close
The features such as degree is higher, it is environmentally friendly because raw material is free of chromium, environment and people and animals will not be damaged, it integrates usability
Magnesite-chrome brick can be better than.
Embodiment
A kind of RH liners chromium-free brick of the present invention, is prepared by following parts by weight of component：
Wherein, 5mm≤fused magnesite coarse granule particle diameter≤8mm, 3mm≤fused magnesite fine grained particle diameter ＜ 5mm, 1mm≤
Fused magnesite fine powder particle diameter ＜ 3mm.
Further, as preferred technical scheme, a kind of RH liners chromium-free brick described above, by following parts by weight
Component is prepared：
A kind of RH liners chromium-free brick described above, MgO ＞ 97wt%, CaO ＜ 1wt%, SiO wherein in fused magnesite2
＜ 1wt%；Light-magnesite powder particle diameter ＜ 0.074mm, and wherein MgO >=80wt%, CaO≤2wt%, SiO2≤ 2wt%；Aluminium
Al ＞ 98wt%, 2wt%≤Mg≤4wt% in magnesium alloy；Electric smelting spinel powder particle diameter ＜ 0.074mm；0.074mm≤electric smelting zirconium
Corundum particle diameter≤1mm.
The method for preparing RH liners chromium-free brick described above, comprises the following steps：
A, fused magnesite coarse granule, fused magnesite fine grained and fused magnesite fine powder are mixed, are preheated to more than 550 DEG C,
Obtain magnesia compound；
B, under vacuum or argon gas atmosphere, after almag is melted at 700~720 DEG C, it is added to magnesia mixing
In material, mix, untill whole magnesia particle surfaces apply and are covered with thin layer of aluminum magnesium alloy；
C, AZS, electric smelting spinel powder, Alpha-alumina micro mist and light-magnesite powder are sequentially added, mixes 40
~60min, liquid phenolic resin, then mixed 35~45min are added, obtains RH liner chromium-free brick compounds；
D, the RH liners that step c obtains are pressed into RH liner chromium-free bricks with chromium-free brick compound under 600MPa pressure
Adobe, after 100~120 DEG C of dry 20~36h, 10~15h is heat-treated at 200~300 DEG C, produces RH liner chromium-free bricks.
Further, the method for preparing RH liner chromium-free bricks described above, in order to reduce workload, save the time and into
This, while cause mixed material mixing evenly, the mortar mixer preferably used in 80~150rpm of rotating speed is mixed in a steps
Middle batch mixing 10min.
The method for preparing RH liner chromium-free bricks described above, in Step d RH liners with Chrome-free brick adobe preferably through 110
DEG C dry 24h.
The embodiment of the present invention is further described with reference to embodiment, therefore not limited the present invention
System is among described scope of embodiments.
Embodiment 1
RH liners chromium-free brick of the present invention is prepared, is comprised the following steps：
A, by the parts by weight of fused magnesite coarse granule 15, the parts by weight of fused magnesite fine grained 25 and the weight of fused magnesite fine powder 20
Part mixes, and is preheated to more than 550 DEG C, obtains magnesia compound；
B, under vacuo, after the parts by weight of almag 10 are melted at 700~720 DEG C, it is added in magnesia compound,
Mix, untill whole magnesia particle surfaces apply and are covered with thin layer of aluminum magnesium alloy；
C, the parts by weight of AZS 15, the parts by weight of electric smelting spinel powder 15, the parts by weight of Alpha-alumina micro mist 6 are sequentially added
And the parts by weight of light-magnesite powder 5,40~60min is mixed, the parts by weight of liquid phenolic resin 5, then mixed 40min is added, obtains
To RH liners chromium-free brick compound；
D, the RH liners that step c obtains are pressed into RH liner chromium-free bricks with chromium-free brick compound under 800MPa pressure
Adobe, after 110 DEG C of dry 24h, 10~15h is heat-treated at 200~300 DEG C, produces RH liner chromium-free bricks.
Chromium-free brick is used for RH inner lining of furnace, service life 16 stove higher than magnesite-chrome brick of lower channel, the use inside dip pipe
Life-span high 11 stove, high 55 stove of service life at remaining position.
Embodiment 2
RH liners chromium-free brick of the present invention is prepared, is comprised the following steps：
A, by the parts by weight of fused magnesite coarse granule 18, the parts by weight of fused magnesite fine grained 20 and the weight of fused magnesite fine powder 25
Part mixes, and is preheated to more than 550 DEG C, obtains magnesia compound；
B, under an argon atmosphere, after the parts by weight of almag 5 are melted at 700~720 DEG C, it is added to magnesia compound
In, mix, untill whole magnesia particle surfaces apply and are covered with thin layer of aluminum magnesium alloy；
C, the parts by weight of AZS 10, the parts by weight of electric smelting spinel powder 10, the parts by weight of Alpha-alumina micro mist 3 are sequentially added
And the parts by weight of light-magnesite powder 2,40~60min is mixed, the parts by weight of liquid phenolic resin 3, then mixed 40min is added, obtains
To RH liners chromium-free brick compound；
D, the RH liners that step c obtains are pressed into RH liner chromium-free bricks with chromium-free brick compound under 800MPa pressure
Adobe, after 110 DEG C of dry 24h, 10~15h is heat-treated at 200~300 DEG C, produces RH liner chromium-free bricks.
Chromium-free brick is used for RH inner lining of furnace, service life 23 stove higher than magnesite-chrome brick of lower channel, the use inside dip pipe
Life-span high 13 stove, high 62 stove of service life at remaining position.
Embodiment 3
RH liners chromium-free brick of the present invention is prepared, is comprised the following steps：
A, by the parts by weight of fused magnesite coarse granule 16, the parts by weight of fused magnesite fine grained 23 and the weight of fused magnesite fine powder 22
Part mixes, and is preheated to more than 550 DEG C, obtains magnesia compound；
B, under an argon atmosphere, after the parts by weight of almag 8 are melted at 700~720 DEG C, it is added to magnesia compound
In, mix, untill whole magnesia particle surfaces apply and are covered with thin layer of aluminum magnesium alloy；
C, the parts by weight of AZS 14, the parts by weight of electric smelting spinel powder 13, the parts by weight of Alpha-alumina micro mist 4 are sequentially added
And the parts by weight of light-magnesite powder 3,40~60min is mixed, the parts by weight of liquid phenolic resin 4, then mixed 40min is added, obtains
To RH liners chromium-free brick compound；
D, the RH liners that step c obtains are pressed into RH liner chromium-free bricks with chromium-free brick compound under 800MPa pressure
Adobe, after 110 DEG C of dry 24h, 10~15h is heat-treated at 200~300 DEG C, produces RH liner chromium-free bricks.
Chromium-free brick is used for RH inner lining of furnace, service life 32 stove higher than magnesite-chrome brick of lower channel, the use inside dip pipe
Life-span high 18 stove, high 75 stove of service life at remaining position.
Claims (6)
- A kind of 1. RH liners chromium-free brick, it is characterised in that：It is prepared by following parts by weight of component：Wherein, 5mm≤fused magnesite coarse granule particle diameter≤8mm, 3mm≤fused magnesite fine grained particle diameter ＜ 5mm, 1mm≤electric smelting Magnesia powder particle diameter ＜ 3mm；Its preparation method is to comprise the following steps：A, fused magnesite coarse granule, fused magnesite fine grained and fused magnesite fine powder are mixed, is preheated to more than 550 DEG C, obtains Magnesia compound；B, under vacuum or argon gas atmosphere, after almag is melted at 700~720 DEG C, it is added in magnesia compound, Mix, untill whole magnesia particle surfaces apply and are covered with thin layer of aluminum magnesium alloy；C, AZS, electric smelting spinel powder, Alpha-alumina micro mist and light-magnesite powder are sequentially added, mix 40~ 60min, liquid phenolic resin, then mixed 35~45min are added, obtains RH liner chromium-free brick compounds；D, the RH liners that step c obtains are pressed into RH liner chromium-free brick bricks with chromium-free brick compound under 800MPa pressure Base, after 100~120 DEG C of dry 20~36h, 10~15h is heat-treated at 200~300 DEG C, produces RH liner chromium-free bricks.
- A kind of 2. RH liners chromium-free brick according to claim 1, it is characterised in that：Prepared by following parts by weight of component and Into：
- A kind of 3. RH liners chromium-free brick according to claim 1 or claim 2, it is characterised in that：MgO ＞ in fused magnesite 97wt%, CaO ＜ 1wt%, SiO2＜ 1wt%；Light-magnesite powder particle diameter ＜ 0.074mm, and wherein MgO >=80wt%, CaO ≤ 2wt%, SiO2≤ 2wt%；Al ＞ 98wt%, 2wt%≤Mg≤4wt% in almag；Electric smelting spinel powder particle diameter ＜ 0.074mm；0.074mm≤AZS particle diameter≤1mm.
- 4. prepare the method for any one of the claims 1 to 3 RH liners chromium-free brick, it is characterised in that：Comprise the following steps：A, fused magnesite coarse granule, fused magnesite fine grained and fused magnesite fine powder are mixed, is preheated to more than 550 DEG C, obtains Magnesia compound；B, under vacuum or argon gas atmosphere, after almag is melted at 700~720 DEG C, it is added in magnesia compound, Mix, untill whole magnesia particle surfaces apply and are covered with thin layer of aluminum magnesium alloy；C, AZS, electric smelting spinel powder, Alpha-alumina micro mist and light-magnesite powder are sequentially added, mix 40~ 60min, liquid phenolic resin, then mixed 35~45min are added, obtains RH liner chromium-free brick compounds；D, the RH liners that step c obtains are pressed into RH liner chromium-free brick bricks with chromium-free brick compound under 800MPa pressure Base, after 100~120 DEG C of dry 20~36h, 10~15h is heat-treated at 200~300 DEG C, produces RH liner chromium-free bricks.
- 5. the method according to claim 4 for preparing RH liner chromium-free bricks, it is characterised in that：Mix and use in a steps The batch mixing 10min in 80~150rpm of rotating speed mortar mixer.
- 6. the method according to claim 4 for preparing RH liner chromium-free bricks, it is characterised in that：Chromium-free brick brick in Step d Base is through 110 DEG C of dry 24h.
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| CN106167409B (en) * | 2016-07-01 | 2018-09-14 | 宁国市开源电力耐磨材料有限公司 | A kind of preparation method of induction furnace furnace lining composite refractory |
| CN108911767B (en) * | 2018-07-27 | 2021-04-09 | 北京金隅通达耐火技术有限公司 | Corundum system unburned brick for key parts of RH refining furnace and preparation method thereof |
| CN112047746A (en) * | 2020-08-10 | 2020-12-08 | 辽宁东和新材料股份有限公司 | Baking-free magnesia-alumina spinel brick for RH dip pipe and preparation method thereof |
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| CN1303036C (en) * | 2004-09-15 | 2007-03-07 | 郑州大学 | Process for preparing high strength corundum refractory material by low temperature sintering |
| CN103265297B (en) * | 2013-01-01 | 2014-12-24 | 北京利尔高温材料股份有限公司 | Refining steel ladle carbon-free periclase spinel baking-free brick and preparation method thereof |
| CN104003738B (en) * | 2014-05-29 | 2015-07-15 | 武汉科技大学 | Smelting separation furnace lining material and preparation method thereof |
| CN104557086A (en) * | 2014-12-30 | 2015-04-29 | 北京利尔高温材料股份有限公司 | Magnesium-enriched spinel carbon brick for slag-out side of wall of steel ladle and preparation method of magnesium-enriched spinel carbon brick |
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