CN102408241A - Low-creep periclase-spinelle heat storage material for air heating furnace and production method thereof - Google Patents

Low-creep periclase-spinelle heat storage material for air heating furnace and production method thereof Download PDF

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Publication number
CN102408241A
CN102408241A CN2010102968714A CN201010296871A CN102408241A CN 102408241 A CN102408241 A CN 102408241A CN 2010102968714 A CN2010102968714 A CN 2010102968714A CN 201010296871 A CN201010296871 A CN 201010296871A CN 102408241 A CN102408241 A CN 102408241A
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content
heat
granularity
storing material
heat storage
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CN2010102968714A
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张国栋
游杰刚
袁政和
刘海啸
罗旭东
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University of Science and Technology Liaoning USTL
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University of Science and Technology Liaoning USTL
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Abstract

The invention discloses a low-creep periclase-spinelle heat storage material for an air heating furnace and a production method thereof. The material comprises the following components in percentage by weight: 70-90% of MgO, 5-20% of Al2O3 and 0-10% of Cr2O3, and has the following physical property indexes: high-temperature creep rate less than 0.5% (1500 DEG C*50 hours), thermal shock stability not less than 15 times (1100 DEG C and circular water cooling) and bulk density not less than 3.0 g/cm<3>. The production method disclosed by the invention comprises the steps of proportioning, mixing, shaping, drying and firing. The obtained periclase-spinelle heat storage material has good heat storage property, good thermal conductivity, and strong resistance to corrosion of alkali metal oxides, can reduce the dependence of the heat storage material of the air heating furnace on an aluminum oxide-silicon dioxide material, and can broaden the utilization of magnesium resources.

Description

Hotblast stove is with low creep square magnesium stone-spinel heat-storing material and working method thereof
Technical field
The present invention relates to ceramic and working method thereof, particularly a kind of hotblast stove is with low creep square magnesium stone-spinel heat-storing material and working method thereof.
Background technology
The large-scale blast furnace hot blast stove heat-storing material is generally selected Al for use at present 2O-SiO 2Al in the material 2O 3Content is raw material at the material of one type of the flint clay grog of clay matter in the high alumina matter scope, high-quality alumina, all kinds of corundum and mullite synthesizing; The natural matter that will select for use require purity high and fine and close; Because the exhaustion of such raw material resources; The source difficulty makes the raw material of hotblast stove heat-storing material more and more nervous.Have only and jump out original circle, the road of on material, walking to make new advances is only inevitable choice.Consult Patent document data in recent years, find name and be called " method of manufacture of Natural manganese dioxide heat-storing material " China and apply for a patent, open (bulletin) number is CN1468932.The magnesia heat-storing material that this patent is introduced adopts the Natural manganese dioxide mixing formula, die casting moulding, seasoning cure and demold.This application does not have the heat-storing material that is applicable to blast funnace hot blast stove is described, does not mention the thermal shock resistance of material yet.
Summary of the invention
The invention provides a kind of hotblast stove with low creep square magnesium stone-spinel heat-storing material and working method thereof.Production anti-thermal shock stability hotblast stove high, that high temperature creep-resisting is good is used the square magnesium stone-spinel heat-storing material.
Hotblast stove provided by the invention is with low creep square magnesium stone-spinel heat-storing material, and it forms with weight percent content following:
MgO?70～90％、Al 2O 3?5～20％、Cr 2O 3?0～10％；
Hotblast stove is following with the physical performance index of low creep square magnesium stone-spinel heat-storing material:
1500 ℃ * 50h of high temperature creep rate＜0.5%; Thermal shock resistance (1100 ℃, recirculated water cooling)>=15 times; Volume density>=3.0g/cm 3
Hotblast stove provided by the invention may further comprise the steps with the working method of low creep square magnesium stone-spinel heat-storing material:
A. prepare burden, each component weight percent content of raw material is following:
Electrosmelted magnesite clinker or highly-purity magnesite 70～90%
Magnesium-aluminium spinel 5～20%
Chrome green 1～10%
Active a-Al 2O 3Micro mist 0～10%
Sub-white corundum powder 0～10%
The MgO weight percent content 97～99% of described electrosmelted magnesite clinker or highly-purity magnesite, granularity≤8mm;
The weight percent content 10～30% of MgO in the described magnesium-aluminium spinel, Al 2O 3Weight percent content be 70～90%, granularity is 3～1mm;
Cr in the described chrome green 2O 3Content>=98; Granularity＜0.074mm;
Described active a-Al 2O 3Content>=99; Meta particle diameter 0.044mm;
Described sub-white corundum powder Al 2O 3Content>=98; Granularity is less than 0.074mm;
B. batch mixing, according to said components content and granularity, earlier with in the joining raw material＜fine powder of 0.074mm mixes in tube mill; Process powder mix, more all materials are mixed in edge runner-wet mill, when in edge runner-wet mill, mixing; Add earlier>=particulate material of 0.074mm mixed 1～2 minute, added wedding agent then and mix after 2～3 minutes to add powder mix again, and the blended time is 15～25 minutes together at last; Process compound; The wedding agent that adds in the mixing process is a lignosulfite, and for liquid, density is 1.20～1.32g/cm to normal temperature down 3
C. moulding, with the compression moulding in 630 tons friction press of above-mentioned compound, the compacting system is 3 light 4 weights;
D. dry, the heat-storing material of above-mentioned compression moulding is put into tunnel drier carries out drying, drying system is 110～150 ℃ of drying temperatures, time of drying 12～24h;
E. burn till, the hyperthermia tunnel Kiln that above-mentioned dried heat-storing material is put into 110m burns till, and calcining system is 1650～1800 ℃, and firing time is 12～24h.
Hotblast stove provided by the invention is compared its significant beneficial effect with the heat-storing material that uses on low creep square magnesium stone-spinel heat-storing material and the present blast funnace hot blast stove and is embodied in the following areas:
1. periclasite-composite spinelle heat-storing material has good heat storage performance, and its heat storage capacity is 1.47 times of clay brick, is 1.27 times of high alumina brick (mullite brick), is 1.65 times of silica brick.
2. periclasite-composite spinelle heat-storing material has good thermal conductivity, and its thermal conductivity is 3.18 times of clay brick in the time of 1000 ℃, is 1.79 times of high alumina brick, is 2.33 times of silica brick.
3. periclasite-composite spinelle heat-storing material is because be that the highly-purity magnesite raw material is a body material, and its combination is secondary spinel mutually, and integral body has the erosion performance of very strong alkali resistant MOX.
4. heat-storing material provided by the invention can reduce the dependence of hotblast stove heat-storing material to the alumina silica based material; And can enlarge the utilization of magnesia resource.
Embodiment
Embodiment 1
Hotblast stove is following with low its component of creep square magnesium stone-spinel heat-storing material and weight percent content:
MgO?85％，Al 2O 3?12％，Cr 2O 3?3％。
Its physical index is: 1500 ℃ * 50h of high temperature creep rate＜0.5%; Thermal shock resistance (1100 ℃, recirculated water cooling)>=15 times; Volume density>=3.0g/cm 3
Hotblast stove is used the working method of low creep square magnesium stone-spinel heat-storing material:
1. prepare burden, by weight percentage:
Electrosmelted magnesite clinker or highly-purity magnesite 82%
Magnesium-aluminium spinel 10%
Chrome green 3%
Active a-Al 2O 3Micro mist 5%
Electrosmelted magnesite clinker or highly-purity magnesite MgO content>=97%, critical particle is 3mm; Wherein the weight percent content of each granularity is that 3～1mm is 28%, and≤1mm is 30%, and＜0.088mm is 24%;
Magnesium-aluminium spinel is MgO content≤28%, Al 2O 3Content>=72%, granularity are 3～1mm;
Cr in the chrome green 2O 3Content>=98; Active a-Al 2O 3Content>=99, chrome green and active a-Al 2O 3The micro mist granularity is less than 0.074mm;
2. batch mixing is according to said components content and granularity, with fine powder, chrome green powder, the active a-Al of electrosmelted magnesite clinker or highly-purity magnesite＜0.074mm 2O 3Powder mixes in tube mill, processes powder mix, and all then materials mix in edge runner-wet mill; When in edge runner-wet mill, mixing; Add earlier>=the 0.074mm particulate material mixed 1～2 minute, added wedding agent then and mix after 2～3 minutes to add powder mix again, and the blended time is 15～25 minutes together at last; The wedding agent that adopts in the mixing process is a lignosulfite, and for liquid, density is 1.20g/cm to normal temperature down 3
3. moulding, with the compression moulding in 630 tons friction press of above-mentioned compound, the compacting system is 3 light 4 weights;
4. dry, the heat-storing material of above-mentioned compression moulding is put into tunnel drier carry out drying; Drying system is 110～150 ℃ of drying temperatures, time of drying 12～24h;
5. burn till, the hyperthermia tunnel Kiln that above-mentioned dried heat-storing material is put into 110m burns till, and calcining system is 1650～1800 ℃, and firing time is 12～24h.
Embodiment 2
Hotblast stove is following with low its component of creep square magnesium stone-spinel heat-storing material and weight percent content:
MgO?84％，Al 2O 3?14％，Cr 2O 3?2％。
Its physical index is with embodiment 1.
Hotblast stove is used the working method of low creep square magnesium stone-spinel heat-storing material:
1. prepare burden, by weight percentage:
Electrosmelted magnesite clinker or highly-purity magnesite 81%
Magnesium-aluminium spinel 10%
Chrome green 2%
Active a-Al 2O 37%
Electrosmelted magnesite clinker or highly-purity magnesite MgO content>=97%, critical particle is 3mm, and wherein the weight percent content of each granularity is that 3～1mm is 28%, and≤1mm is 30%, and＜0.088mm is 23%;
Magnesium-aluminium spinel is MgO content≤28%, Al 2O 3Content>=72%, granularity are 3～1mm;
Cr in the chrome green 2O 3Content>=98; Active a-Al 2O 3Content>=99, chrome green and active a-Al 2O 3The micro mist granularity is less than 0.074mm;
2. batch mixing is according to said components content and granularity, with fine powder, chrome green, the active a-Al of electrosmelted magnesite clinker or highly-purity magnesite＜0.074mm 2O 3Powder mixes in tube mill, processes powder mix, and all then materials mix in edge runner-wet mill; When in edge runner-wet mill, mixing; Add earlier>=the 0.074mm particulate material mixed 1～2 minute, added wedding agent then and mix after 2～3 minutes to add powder mix again, and the blended time is 15～25 minutes together at last; The wedding agent that adopts in the mixing process is a lignosulfite, and for liquid, density is 1.20g/cm to normal temperature down 3
3. moulding, with the compression moulding in 630 tons friction press of above-mentioned compound, the compacting system is 3 light 4 weights;
4. dry, the heat-storing material of above-mentioned compression moulding is put into tunnel drier carry out drying; Drying system is 110～150 ℃ of drying temperatures, time of drying 12～24h;
5. burn till, the hyperthermia tunnel Kiln that above-mentioned dried heat-storing material is put into 110m burns till, and calcining system is 1650～1800 ℃, and firing time is 12～24h.
Embodiment 3
Hotblast stove is following with low its component of creep square magnesium stone-spinel heat-storing material and weight percent content:
MgO?84％，Al 2O 3?13％，Cr 2O 3?3％。
Its physical index is with embodiment 1.
Hotblast stove is used the working method of low creep square magnesium stone-spinel heat-storing material:
1. prepare burden, by weight percentage:
Electrosmelted magnesite clinker or highly-purity magnesite 81%
Magnesium-aluminium spinel 10%
Chrome green 3%
Sub-white corundum powder 7%
Electrosmelted magnesite clinker or highly-purity magnesite MgO content>=97%, critical particle is 3mm; Wherein the weight percent content of each granularity is that 3～1mm is 28%, and≤1mm is 30%, is 23% less than 0.088mm;
Magnesium-aluminium spinel is MgO content≤28%, Al 2O 3Content>=72%, granularity are 3～1mm;
Cr in the chrome green 2O 3Content>=98; Active a-Al 2O 3Content>=99, chrome green and sub-white corundum powder degree are less than 0.074mm;
2. batch mixing according to said components content and granularity, mixes electrosmelted magnesite clinker or highly-purity magnesite fine powder, chrome green, the sub-white corundum powder less than 0.074mm in tube mill; Process powder mix; All then materials mix in edge runner-wet mill, when in edge runner-wet mill, mixing, add earlier>=the 0.074mm particulate material mixed 1～2 minute; Add wedding agent then and mix after 2～3 minutes and add powder mix again, the blended time is 15～25 minutes together at last; The wedding agent that adopts in the mixing process is a lignosulfite, and for liquid, density is 1.20g/cm to normal temperature down 3
3. moulding, with the compression moulding in 630 tons friction press of above-mentioned compound, the compacting system is 3 light 4 weights;
4. dry, the heat-storing material of above-mentioned compression moulding is put into tunnel drier carry out drying; Drying system is 110～150 ℃ of drying temperatures, time of drying 12～24h;
5. burn till, the hyperthermia tunnel Kiln that above-mentioned dried heat-storing material is put into 110m burns till, and calcining system is 1650～1800 ℃, and firing time is 12～24h.

Claims (2)

1. a hotblast stove is characterized in that with low creep square magnesium stone-spinel heat-storing material the composition of this material and weight percent content are following:
MgO?70～90％、Al 2O 3?5～20％、Cr 2O 3?0～10％；
Hotblast stove is following with the physical performance index of low creep square magnesium stone-spinel heat-storing material:
1500 ℃ * 50h of high temperature creep rate＜0.5%; Thermal shock resistance (1100 ℃, recirculated water cooling)>=15 times; Volume density>=3.0g/cm 3
2. the said hotblast stove of claim 1 is characterized in that with the working method of low creep square magnesium stone-spinel heat-storing material this method may further comprise the steps:
A. prepare burden, each component weight percent content of raw material is following:
Electrosmelted magnesite clinker or highly-purity magnesite 70～90%
Magnesium-aluminium spinel 5～20%
Chrome green 1～10%
Active a-Al 2O 3Micro mist 0～10%
Sub-white corundum powder 0～10%
The MgO weight percent content 97～99% of electrosmelted magnesite clinker wherein or highly-purity magnesite, granularity are 0～8mm;
The weight percent content 10～30% of MgO in the magnesium-aluminium spinel wherein, Al 2O 3Weight percent content be 70～90%, granularity is 3～1mm;
Cr in the chrome green wherein 2O 3Content>=98, granularity is less than 0.074mm;
Active a-Al wherein 2O 3Content>=99, meta particle diameter 0.044mm;
Sub-white corundum powder Al wherein 2O 3Content>=98, granularity is less than 0.074mm;
B. batch mixing, according to said components content and granularity, earlier with in the joining raw material＜fine powder of 0.074mm mixes in tube mill; Process powder mix, more all materials are mixed in edge runner-wet mill, when in edge runner-wet mill, mixing; Add earlier>=particulate material of 0.074mm mixed 1～2 minute, added wedding agent then and mix after 2～3 minutes to add powder mix again, and the blended time is 15～25 minutes together at last; Process compound; The wedding agent that adds in the mixing process is a lignosulfite, and for liquid, density is 1.20～1.32g/cm to normal temperature down 3
C. moulding, with the compression moulding in 630 tons friction press of above-mentioned compound, the compacting system is 3 light 4 weights;
D. dry, the heat-storing material of above-mentioned compression moulding is put into tunnel drier carries out drying, drying system is 110～150 ℃ of drying temperatures, time of drying 12～24h;
E. burn till, the hyperthermia tunnel Kiln that above-mentioned dried heat-storing material is put into 110m burns till, and calcining system is 1650～1800 ℃, and firing time is 12～24h.
CN2010102968714A 2010-09-23 2010-09-23 Low-creep periclase-spinelle heat storage material for air heating furnace and production method thereof Pending CN102408241A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110452013A (en) * 2019-08-01 2019-11-15 辽宁科技大学 A method of periclase heat-barrier material is prepared using waste magnesia carbon bricks
CN112320851A (en) * 2020-11-10 2021-02-05 辽宁科技大学 Preparation method of hercynite powder with sheet structure

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1068560A (en) * 1991-07-12 1993-02-03 东北工学院 Chromium slag refractory material and manufacture method thereof
CN1168416A (en) * 1997-03-26 1997-12-24 冶金工业部钢铁研究总院 Dispersed air-supplying element for bottom air supply of metallurgical furnace and its manufacture
CN1748116A (en) * 2003-03-05 2006-03-15 耐火材料控股有限公司 Refractory wall and refractory bricks for building said wall
CN101786894A (en) * 2009-01-26 2010-07-28 通用电气公司 Treated refractory materials and preparation method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1068560A (en) * 1991-07-12 1993-02-03 东北工学院 Chromium slag refractory material and manufacture method thereof
CN1168416A (en) * 1997-03-26 1997-12-24 冶金工业部钢铁研究总院 Dispersed air-supplying element for bottom air supply of metallurgical furnace and its manufacture
CN1748116A (en) * 2003-03-05 2006-03-15 耐火材料控股有限公司 Refractory wall and refractory bricks for building said wall
CN101786894A (en) * 2009-01-26 2010-07-28 通用电气公司 Treated refractory materials and preparation method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110452013A (en) * 2019-08-01 2019-11-15 辽宁科技大学 A method of periclase heat-barrier material is prepared using waste magnesia carbon bricks
CN112320851A (en) * 2020-11-10 2021-02-05 辽宁科技大学 Preparation method of hercynite powder with sheet structure

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Application publication date: 20120411