CN103288460A - Casting material for prefabricating burner block of annular heating furnace - Google Patents

Casting material for prefabricating burner block of annular heating furnace Download PDF

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Publication number
CN103288460A
CN103288460A CN2012100449350A CN201210044935A CN103288460A CN 103288460 A CN103288460 A CN 103288460A CN 2012100449350 A CN2012100449350 A CN 2012100449350A CN 201210044935 A CN201210044935 A CN 201210044935A CN 103288460 A CN103288460 A CN 103288460A
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CN
China
Prior art keywords
burner block
mould
heating furnace
casting
furnace
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
CN2012100449350A
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Chinese (zh)
Inventor
王永萍
吴辉
高立
张胜强
齐晓青
陈路兵
沈伟国
励军
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.)
SHANGHAI JIUJIN REFRACTORY MATERIALS CO Ltd
Shanghai Baosteel Industry Technological Service Co Ltd
Original Assignee
SHANGHAI JIUJIN REFRACTORY MATERIALS CO Ltd
Shanghai Baosteel Industry Technological Service 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 SHANGHAI JIUJIN REFRACTORY MATERIALS CO Ltd, Shanghai Baosteel Industry Technological Service Co Ltd filed Critical SHANGHAI JIUJIN REFRACTORY MATERIALS CO Ltd
Priority to CN2012100449350A priority Critical patent/CN103288460A/en
Publication of CN103288460A publication Critical patent/CN103288460A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a casting material for prefabricating a burner block of an annular heating furnace. The casting material comprises the following components in percentage by weight: 2-4% of pure calcium aluminate cement, 2-8% of silica micro-powder, 2-8% of aluminum oxide micro-powder and the balance of a refractory aggregate. The burner block adopting the casting material is high in high-temperature mechanical strength, stable in volume, good in thermal shock stability and abrasive resistance, and capable of resisting huge thermal shock stress generated during fuel combustion, so that the service life of the burner block is prolonged, the overhauling time of the burner block is reduced, the maintenance cost of the heating furnace is reduced, and the normal running of the heating furnace is ensured.

Description

The mould material that is used for the prefabricated burner block of rotary heating furnace
Technical field
The present invention relates to mould material, relate in particular to a kind of mould material for the prefabricated burner block of rotary heating furnace.
Background technology
Rotary heating furnace is the important heating installation in pipe mill, and maximum operating temperature reaches 1350 ℃ in the stove, and this process furnace is made up of preheating section, heating zone, soaking zone, and heated material is realized preheating, heating, the soaking of pipe by the rotation of furnace bottom chassis.
Rotary heating furnace adopts mixed gas by being distributed in 95 burner heating on the exterior wall in the rotary heating furnace; During process furnace capital construction, 95 burners are built by laying bricks or stones in the process furnace body of wall by burner block, and each burner block all adopts moldable ramming to be reinforced and seal.After the long-time running of process furnace process, problems such as moldable burner block is loose, slump, furnace wall refractory brick bulging occur, caused burner block top refractory brick to subside, caused furnace chamber to scurry fire, furnace shell is rubescent, reduce the work-ing life of process furnace, influenced the hot-work quality of pipe.When the process furnace overhaul, need furnace wall refractory brick and moldable burner block are repaired for this reason, implement the replacing of burner block.For guaranteeing the installation quality of burner block, guarantee moldable ramming direction and degree of compactness, just must remove the part furnace roof, and then carry out moldable ramming construction; Perhaps adopt the formwork pouring type to carry out the installation of burner block.But traditional burner block repairing construction time is long, efficient is low, owing to be subjected to the restriction of process furnace time between overhaul, can't satisfy the requirement of burner block installation quality and on-the-spot erection schedule simultaneously.
Summary of the invention
Technical problem to be solved by this invention provides a kind of mould material for the prefabricated burner block of rotary heating furnace, adopt burner block high-temperature machinery intensity height, volume stability, thermal shock resistance and the wear resistance of this mould material good, the huge thermal shock stress that produces in the time of can resisting fuel combustion, prolonged the work-ing life of burner block, reduced the burner block repair time, reduce the maintenance cost of process furnace, guaranteed the normal operation of process furnace.
For solving the problems of the technologies described above, component and weight percent that the present invention is used for the mould material of the prefabricated burner block of rotary heating furnace are:
Pure calcium aluminate cement 2-4%,
Silicon powder 2-8%,
Alumina powder 2-8%,
Surplus is refractory aggregate.
Further, above-mentioned refractory aggregate comprises one or more in electric smelting or fused mullite, electric smelting or alundum, alumina, andaluzite, the sillimanite.
Further, Al in above-mentioned electric smelting or the fused mullite 2O 3Content is more than or equal to 60%, Al in described electric smelting or the alundum 2O 3Content is more than or equal to 98%, Al in the described alumina 2O 3Content is more than or equal to 85%.
Adopted technique scheme because the present invention is used for the mould material of the prefabricated burner block of rotary heating furnace, namely the component of this mould material and weight percent are: the pure calcium aluminate cement of 2-4%, and the silicon powder of 2-8%, the alumina powder of 2-8%, surplus is refractory aggregate.Adopt burner block high-temperature machinery intensity height, volume stability, thermal shock resistance and the wear resistance of this mould material good, the huge thermal shock stress that produces in the time of can resisting fuel combustion, prolonged the work-ing life of burner block, reduced the burner block repair time, reduce the maintenance cost of process furnace, guaranteed the normal operation of process furnace.
Embodiment
Component and weight percent that the present invention is used for the mould material of the prefabricated burner block of rotary heating furnace are:
Pure calcium aluminate cement 2-4%,
Silicon powder 2-8%,
Alumina powder 2-8%,
Surplus is refractory aggregate.
Further, above-mentioned refractory aggregate comprises one or more in electric smelting or fused mullite, electric smelting or alundum, alumina, andaluzite, the sillimanite.
Further, Al in above-mentioned electric smelting or the fused mullite 2O 3Content is more than or equal to 60%, Al in described electric smelting or the alundum 2O 3Content is more than or equal to 98%, Al in the described alumina 2O 3Content is more than or equal to 85%.
This mould material can be made prefabricated section by mould material manufacturer and carry out the scene installation, also can directly pour into a mould use by using the producer scene to make mould according to the burner block shape.This mould material adopts ultra-low cement in conjunction with Al 2O 3-SiO 2Its CaO content is low, it is mullite or corundum mutually that high temperature burns material master ore deposit, back, it all is high temperature ore deposit phase, have very high use temperature and refractoriness under load, also introduce electric smelting or alundum or alumina aggregate and the powder of high abrasion in the batching, and add low electric smelting or fused mullite aggregate and the powder of thermal expansivity, thereby in the intensity that has improved mould material, wear resistance, guaranteed thermal shock resistance energy and the high volume stability of material effectively.
As everyone knows, cement is low cement or ultra-low cement are produced intensity in conjunction with mould material major cause as a kind of gelling material, CaO content is between 0.9% ~ 2.5% in the low cement deposit material, CaO content≤0.9% in the ultra-low cement deposit material, when the cement add-on is lower than 2%, the strength of materials is too low, and wear resistance is bad; And the cement add-on is higher than at 4% o'clock, and is too much with the CaO that cement is brought into, in the hot environment use, forms more low-melting grey feldspar (2CaO Al in the material easily 2O 3SiO 2, MP1590 ℃), melilith (CaO Al 2O 32SiO 2, MP1550 ℃) etc. mineral, so to adopt cement content in this mould material be 2-4%.
When water reducer, the existence of super-fine powder such as silicon powder, alumina powder can make mould material obtain high workability under low moisture add-on condition in this mould material, and this intensity to mould material, wear resistance influence very big; Silicon powder, alumina powder add-on are lower than 2% respectively, and casting material strength, wear resistance are bad; Be higher than 8%, flowability, the intensity that improves mould material be there is no practical significance.Therefore, the silicon powder in this mould material, alumina powder content are respectively 2-8%.
Mullite is a kind of good refractory raw material, and its thermal expansivity is low, heat conductance is also lower, adds the heat conductivility that mullite is conducive to improve the thermal shock resistance of material and reduces material; Corundum, alumina also all are good refractory raw materials, its hardness height, high-temperature behavior is good, but swelling property height, heat conductance are good, intensity, the wear resistance of mould material can be improved behind adding corundum, the alumina, but its heat conductivility that can reduce the thermal shock resistance of material and improve material.Therefore the refractory aggregate in this mould material can adopt one or more in the refractory raw materials such as electric smelting or fused mullite, electric smelting or alundum, alumina, andaluzite, sillimanite, to guarantee when improving the strength of materials, wear resistance, guarantee thermal shock resistance energy and the high volume stability of material effectively.
Identical with general mould material, also can add a small amount of organic fibre, metallic aluminium powder etc. when adopting this mould material to make burner block, to improve the anti-cracking property of mould material in bake process.
Mould material manufacturer adopts this casting material prefabricated burner block technological process:
Adopt one-shaping technique that anchored brick directly is fixed in the prefabricated burner block body, thereby guarantee that burner block body and anchored brick are in conjunction with tight; Prefabricated burner block inside arranges metal lift hook spare, guarantee burner block body transportation, quick and easy for installation, metal lift hook spare adopts preventing high temperature oxidation and anti-high temperature expansion process in advance, can not produce detrimentally affect to prefabricated section to guarantee the metal hook member under high temperature use state.Its concrete making processes is as follows:
(1) makes mould according to the burner block shape;
(2) according to the position of anchored brick and metal lift hook spare in the burner block, in advance anchored brick and metal lift hook spare are fixed on the position of stipulating in the mould;
(3) mould material is added water and stirs after, to going into casting in the mould;
(4) the about 48h of maintenance in the mould material mould, the material feeding sclerosis back demoulding to be poured;
(5) after the burner block demoulding, the about 48h of maintenance under physical environment;
(6) it is roasting that burner block that maintenance is good advances kilning, and the highest storing temperature is 600 ℃.
In order to examine and to verify that can the actual use properties of prefabricated burner block satisfy the applying working condition at rotary heating furnace burner position, as follows through the beneficial effect that online local experiment obtains:
(1) compare with moldable, when adopting this mould material that rotary heating furnace furnace wall burner block is repaired, need not to remove the furnace roof hanger brick, the repair time is shorter, and installation quality is good.If adopt moldable ramming mode to repair, the furnace roof hanger brick must be removed and can guarantee burner block ramming physique amount, and burner overhauls and change needs process formwork, ramming, form removal, surface galling, penetrates operations such as pore, and the time is longer;
(2) adopt this mould material, without operations such as formwork, cast, maintenance, form removal, healths, need not special baker in the burner block installation process, press the conventional maintenance of process furnace process implementing and get final product, process furnace is shorter stop time.
Adopt this casting material prefabricated burner block body construction, not only effectively prevent the process furnace gas blowby, reveal and burn with anger, and when using installation, compare with original moldable constructional method, can significantly reduce the rotary heating furnace burner block and change the time, use this mould material required time only to be about 30% of conventional construction method.The prefabricated burner block that adopts this mould material moves 16 months and carries out hot observation after going into operation, prefabricated burner block one-piece construction is intact, and the burner block surfacing does not have damage substantially, has effectively improved the work-ing life of burner block, has improved the operational efficiency of process furnace.

Claims (3)

1. mould material that is used for the prefabricated burner block of rotary heating furnace, it is characterized in that: the component of described mould material and weight percent are:
Pure calcium aluminate cement 2-4%,
Silicon powder 2-8%,
Alumina powder 2-8%,
Surplus is refractory aggregate.
2. the mould material for the prefabricated burner block of rotary heating furnace according to claim 1 is characterized in that: described refractory aggregate comprises one or more in electric smelting or fused mullite, electric smelting or alundum, alumina, andaluzite, the sillimanite.
3. the mould material for the prefabricated burner block of rotary heating furnace according to claim 2 is characterized in that: Al in described electric smelting or the fused mullite 2O 3Content is more than or equal to 60%, Al in described electric smelting or the alundum 2O 3Content is more than or equal to 98%, Al in the described alumina 2O 3Content is more than or equal to 85%.
CN2012100449350A 2012-02-27 2012-02-27 Casting material for prefabricating burner block of annular heating furnace Pending CN103288460A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
CN2012100449350A CN103288460A (en) 2012-02-27 2012-02-27 Casting material for prefabricating burner block of annular heating furnace

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103467124A (en) * 2013-09-30 2013-12-25 武汉科技大学 Spinel castables for coal water slurry gasification furnace and using method thereof
CN105601306A (en) * 2016-01-23 2016-05-25 山东鲁铭高温材料科技有限公司 Unshaped refractory material for zinc oxide rotary kiln and production technology for lining bricks
CN105758184A (en) * 2016-03-28 2016-07-13 攀钢集团西昌钢钒有限公司 Repairing method for preventing heat storage type heating furnace burner from fire run
CN105889930A (en) * 2016-06-01 2016-08-24 马鞍山天洲节能工程科技有限公司 Nozzle and manufacturing method thereof
CN106380213A (en) * 2016-08-31 2017-02-08 浙江盛旺耐火材料股份有限公司 Circulation boiler dedicated castable material
CN107188579A (en) * 2017-06-28 2017-09-22 长兴鑫迪耐火材料厂 A kind of wear-resisting preformed bricks
CN108530040A (en) * 2017-03-02 2018-09-14 上海安可科技股份有限公司 Castable refractory and ladle baking burner for ladle baking burner
CN108530089A (en) * 2017-03-02 2018-09-14 上海安可科技股份有限公司 Castable refractory and burning nozzle for heating intermediate ladle for burning nozzle for heating intermediate ladle

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1450020A (en) * 2003-05-09 2003-10-22 宜兴天霸非金属材料有限公司 Alkali-resistant, chlorine-resistant and fire-resistant casting material

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1450020A (en) * 2003-05-09 2003-10-22 宜兴天霸非金属材料有限公司 Alkali-resistant, chlorine-resistant and fire-resistant casting material

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103467124A (en) * 2013-09-30 2013-12-25 武汉科技大学 Spinel castables for coal water slurry gasification furnace and using method thereof
CN103467124B (en) * 2013-09-30 2014-12-17 武汉科技大学 Spinel castables for coal water slurry gasification furnace and using method thereof
CN105601306A (en) * 2016-01-23 2016-05-25 山东鲁铭高温材料科技有限公司 Unshaped refractory material for zinc oxide rotary kiln and production technology for lining bricks
CN105601306B (en) * 2016-01-23 2018-07-10 山东鲁铭高温材料股份有限公司 Aoxidize the production technology of rotary kiln amorphous refractory and liner tile
CN105758184A (en) * 2016-03-28 2016-07-13 攀钢集团西昌钢钒有限公司 Repairing method for preventing heat storage type heating furnace burner from fire run
CN105889930A (en) * 2016-06-01 2016-08-24 马鞍山天洲节能工程科技有限公司 Nozzle and manufacturing method thereof
CN109611845A (en) * 2016-06-01 2019-04-12 马鞍山天洲节能工程科技有限公司 A kind of manufacturing method of burner
CN109611845B (en) * 2016-06-01 2020-04-14 马鞍山天洲节能工程科技有限公司 Manufacturing method of burner
CN105889930B (en) * 2016-06-01 2018-12-14 马鞍山天洲节能工程科技有限公司 A kind of burner and its manufacturing method
CN106380213A (en) * 2016-08-31 2017-02-08 浙江盛旺耐火材料股份有限公司 Circulation boiler dedicated castable material
CN108530040A (en) * 2017-03-02 2018-09-14 上海安可科技股份有限公司 Castable refractory and ladle baking burner for ladle baking burner
CN108530089A (en) * 2017-03-02 2018-09-14 上海安可科技股份有限公司 Castable refractory and burning nozzle for heating intermediate ladle for burning nozzle for heating intermediate ladle
CN108530089B (en) * 2017-03-02 2021-08-06 上海安可科技股份有限公司 Refractory castable for tundish baking burner and tundish baking burner
CN107188579A (en) * 2017-06-28 2017-09-22 长兴鑫迪耐火材料厂 A kind of wear-resisting preformed bricks

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Application publication date: 20130911