CN107353021A - A kind of preparation technology of high intensity environmental-protection furnace stemming - Google Patents

A kind of preparation technology of high intensity environmental-protection furnace stemming Download PDF

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Publication number
CN107353021A
CN107353021A CN201710587021.1A CN201710587021A CN107353021A CN 107353021 A CN107353021 A CN 107353021A CN 201710587021 A CN201710587021 A CN 201710587021A CN 107353021 A CN107353021 A CN 107353021A
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preparation technology
high intensity
environmental
protection furnace
stemming
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臧猛飞
臧会民
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Yanshi Citizens Furnace Charge Co Ltd
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Yanshi Citizens Furnace Charge Co Ltd
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Abstract

A kind of preparation technology of high intensity environmental-protection furnace stemming, the percentage by weight that assembles of each component is in raw material, mullite 10~20%, carborundum 10~15%, andalusite 5~15%, carbon materials 15~20%, ball clay 10~20%, aluminium nitride 5~25%, Vanadium Carbide 5~10%, Ultramicro-powder 5~15%, above each component sum by weight ratio are 100%；Add raw materials into pug mill it is well mixed after, add the bonding agent for accounting for raw material gross weight 15~25%, mixed grind discharges for 30~45 minutes at 45~65 DEG C, and pug pass through mud extruder extrusion forming, is placed after packaging 3~5 days, i.e., obtained environmental-protection furnace stemming finished product；The stemming plasticity produced is good, and intensity is high, easily opening, and anti-erosion and performance of flushing are good, and the mud drum of formation is big and firm, effectively protect iron mouth region domain not corroded by circulation in stove, reach the purpose of furnace retaining.

Description

A kind of preparation technology of high intensity environmental-protection furnace stemming
Technical field
The present invention relates to metallurgical ironmaking technology field, it is the refractory material of stifled iron notch during blast furnace ironmaking, invents one The preparation technology of kind high intensity environmental-protection furnace stemming.
Background technology
Blast furnace is the smelting equipment of smelter ironmaking, a newly-built large blast furnace or a large blast furnace is transformed Property overhaul, even tens yuan of up to more than ten00000000 yuan of investment, therefore blast furnace worker is especially heavy to prolonging campaign problem both at home and abroad Depending on.At present, external blast furnace generation furnace life (being repaiied without in) is 15 years or so, and domestic blast furnace is repaiied in carrying out 1 time within 3~5 years, and some is very Just repaiied to 1 year, domestic generation furnace life is few in number more than 10 years (being repaiied in not).The main portions for influenceing the life of the blast furnace are stoves Cylinder side wall and furnace bottom, iron mouth region domain are the most weak links of bosh gas index, and the quality in the region directly affects the life of the blast furnace.
A kind of stemming that patent CN102399088A " taphole stemming used for oversize blast furnaces " is provided, consisting of (weight Percentage %)：Brown Alundum 25~50%, carborundum 5~20%, ferro-silicon nitride 7~25%, composite carbon element material 15~30%, Kaolin 5~15%, composite refractory micro mist 3~7%, composite metal powder 1~5%, additional coal tar 15~25%.The big gun Mud makees bonding agent using coal tar, and fixed carbon content is far below T60 resins, and bond strength is low, and furnace retaining effect declines, and is not inconsistent Close the requirement of environmental protection at present.
In view of the foregoing, a kind of preparation technology of high intensity environmental-protection furnace stemming is now developed.
The content of the invention
The invention aims to overcome deficiency of the prior art, there is provided a kind of preparation work of high intensity environmental-protection furnace stemming Skill, the stemming plasticity produced is good, and intensity is high, easily opening, and anti-erosion and performance of flushing are good, and the mud drum of formation is big and firm, has Effect protects iron mouth region domain not corroded by circulation in stove, reaches the purpose of furnace retaining.
The present invention to achieve these goals, adopts the following technical scheme that：A kind of preparation technology of high intensity environmental-protection furnace stemming, The percentage by weight that assembles of each component is mullite 10~20% in raw material, carborundum 10~15%, andalusite 5~15%, carbon Cellulosic material 15~20%, ball clay 10~20%, aluminium nitride 5~25%, Vanadium Carbide 5~10%, Ultramicro-powder 5~15%, Above each component sum by weight ratio is 100%；
Add raw materials into pug mill it is well mixed after, add the bonding agent for accounting for raw material gross weight 15~25%, 45~ Mixed grind discharges for 30~45 minutes at 65 DEG C, and pug passes through mud extruder extrusion forming, is placed after packaging 3~5 days, that is, furnace retaining is made Stemming finished product.
The mullite is the mullite of electric smelting 70.
The carborundum content more than 98%.
The carbon materials is graphite or coke, and one or both therein mixes.
The Ultramicro-powder is alumina powder or ultrafine silica powder, and one or both therein mixes.
The bonding agent is CarboresT60 resins.
The present invention's effective is：The stemming plasticity is good, and intensity is high, easily opening, and anti-erosion and performance of flushing are good, formation Mud drum is big and firm, effectively protects iron mouth region domain not corroded by circulation in stove, reaches the purpose of furnace retaining.
The high intensity environmental-protection furnace stemming of the present invention has the following advantages that compared with existing stemming：Vanadium Carbide is added, can be Iron mouth region domain forms high-strength deposit, plays a part of increase, firm mud drum；Added with ball clay, the plastic of stemming is improved Property and caking property, make stemming easily block up and fill up space, good with old mud adhesive ability；Added with andalusite, formed in high temperature Mullite, and with volumetric expansion, avoid cracking because of the sintering shrinkage of clay etc.；The electrofused mullite thermostabilization of addition Property is good, and can mutually be became one with the mullite newly formed in matrix, and the intensity of stemming is further increased；Add suitably Coke powder and graphite, iron mouth is easily opened, and the erosiveness of stemming anti-slag iron can be improved；The carborundum and aluminium nitride of addition, Washing away and corroding for slag iron can be resisted, is further ensured that tapping hole is not easy reaming under high pressure, ensures that molten iron and slag can be at the uniform velocity Outflow；Ultramicro-powder is added, the sintering of matrix can be promoted.The mud drum generated using this stemming, big and firm, corrosion resistance is strong, Make the circulation offset from side wall in iron mouth region domain, so as to the purpose for reaching protection cupola well, extending the life of the blast furnace.
The present invention can preferably protect that iron mouth region domain bosh gas index is not destroyed, and Yi Dani, the old and new's mud is combined, constantly not Leakage, resistance to slag iron corrode, without obvious reaming phenomenon, tapped a blast furnace 180 minutes or so, easily opening, do not emit tobacco, without penetrating odor, Mud drum is stable, iron mouth appropriate depth.Judge, because using on the blast furnace that the damage of iron mouth region domain prepares to scrap, to prolong the life of the blast furnace one It is long 2 years.Stemming intensity is high, easily opening, appropriate depth, resistant to corrosion, tapping duration length.
Embodiment
The present invention is described in further detail with embodiment with reference to embodiment：
Embodiment 1
By following dispensing：0.001~4mm mullites 20%, the carborundum 15% of 325 mesh contents 98%, 0.001~1mm Andalusite 5%, 0.001~0.5mm carbon materialses 15%, ball clay 10%, aluminium nitride 20%, Vanadium Carbide 8%, aluminum oxide Micro mist and ultrafine silica powder press 4：1 Ultramicro-powder 7% being configured to；
Add raw materials into pug mill it is well mixed after, add the bonding agent for accounting for raw material gross weight 18%, mixed at 50 DEG C Grind 30 minutes and discharge, pug passes through mud extruder extrusion forming, that is, environmental-protection furnace stemming finished product is made；
Stemming sampling is carried out to the test of physical property, its index is：1450 DEG C of * 3h compressive resistance is 18.6MPa, 1450 DEG C of * 3h Linear change rates are~0.03%, and 1450 DEG C of * 3h rupture strength is 3.8MPa, and 1450 DEG C of * 3h bulk density is 2.18g/cm3。
Embodiment 2
By following dispensing：0.001~4mm mullites 15%, the carborundum 10% of 325 mesh contents 98%, 0.001~1mm Andalusite 13%, 0.001~0.5mm carbon materialses 20%, ball clay 20%, aluminium nitride 5%, Vanadium Carbide 5%, aluminum oxide Micro mist and ultrafine silica powder press 4：1 Ultramicro-powder 12% being configured to；
Add raw materials into pug mill it is well mixed after, add the bonding agent for accounting for raw material gross weight 22%, mixed at 50 DEG C Grind 40 minutes and discharge, pug passes through mud extruder extrusion forming, that is, environmental-protection furnace stemming finished product is made；
Stemming sampling is carried out to the test of physical property, its index is：1450 DEG C of * 3h compressive resistance is 16.3MPa, 1450 DEG C of * 3h Linear change rates are+0.11%, and 1450 DEG C of * 3h rupture strength is 3.5MPa, and 1450 DEG C of * 3h bulk density is 2.06g/cm3。
Embodiment 3
By following dispensing：0.001~4mm mullites 14%, the carborundum 12% of 325 mesh contents 98%, 0.001~1mm Andalusite 15%, 0.001~0.5mm carbon materialses 18%, ball clay 15%, aluminium nitride 10%, Vanadium Carbide 6%, oxidation Aluminium micro mist and ultrafine silica powder press 4：1 Ultramicro-powder 10% being configured to；
Add raw materials into pug mill it is well mixed after, add the bonding agent for accounting for raw material gross weight 20%, mixed at 50 DEG C Grind 35 minutes and discharge, pug passes through mud extruder extrusion forming, that is, environmental-protection furnace stemming finished product is made；
Stemming sampling is carried out to the test of physical property, its index is：1450 DEG C of * 3h compressive resistance is 17.2MPa, 1450 DEG C of * 3h Linear change rates are+0.29%, and 1450 DEG C of * 3h rupture strength is 3.6MPa, and 1450 DEG C of * 3h bulk density is 2.11g/cm3。

Claims (6)

  1. A kind of 1. preparation technology of high intensity environmental-protection furnace stemming, it is characterised in that：The percentage by weight that assembles of each component is in raw material, Mullite 10~20%, carborundum 10~15%, andalusite 5~15%, carbon materials 15~20%, ball clay 10~20%, Aluminium nitride 5~25%, Vanadium Carbide 5~10%, Ultramicro-powder 5~15%, above each component sum by weight ratio are 100%；
    Add raw materials into pug mill it is well mixed after, the bonding agent for accounting for raw material gross weight 15~25% is added, at 45~65 DEG C Lower mixed grind discharges for 30~45 minutes, and pug passes through mud extruder extrusion forming, is placed after packaging 3~5 days, that is, environmental-protection furnace stemming is made Finished product.
  2. A kind of 2. preparation technology of high intensity environmental-protection furnace stemming according to claim 1, it is characterised in that：The mullite is The mullite of electric smelting 70.
  3. A kind of 3. preparation technology of high intensity environmental-protection furnace stemming according to claim 1, it is characterised in that：The carborundum contains Amount more than 98%.
  4. A kind of 4. preparation technology of high intensity environmental-protection furnace stemming according to claim 1, it is characterised in that：The carbon materials For graphite or coke, one or both mixing therein.
  5. A kind of 5. preparation technology of high intensity environmental-protection furnace stemming according to claim 1, it is characterised in that：The Ultramicro-powder is Alumina powder or ultrafine silica powder, one or both mixing therein.
  6. A kind of 6. preparation technology of high intensity environmental-protection furnace stemming according to claim 1, it is characterised in that：The bonding agent is CarboresT60 resins.
CN201710587021.1A 2017-07-18 2017-07-18 A kind of preparation technology of high intensity environmental-protection furnace stemming Pending CN107353021A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108675774A (en) * 2018-06-19 2018-10-19 佘春霞 A kind of environmentally friendly anhydrous stemming of mineral hot furnace
CN108794029A (en) * 2018-07-17 2018-11-13 北京瑞普同创科技发展有限公司 Titaniferous environmental-protection furnace stemming
CN108911762A (en) * 2018-06-19 2018-11-30 佘春霞 A kind of blast furnace protecting wall building stemming
CN109503173A (en) * 2018-11-30 2019-03-22 河南华西耐火材料有限公司 A kind of blast furnace cooling stave high-strength composite material, preparation method and its application in protection cooling wall
CN111233499A (en) * 2020-03-12 2020-06-05 巩义市芙豪冶金材料有限公司 SiC/C homogeneous material, stemming and preparation method thereof
CN113816728A (en) * 2021-06-23 2021-12-21 江苏新环美节能技术有限公司 Stemming for high-strength smelting super-huge blast furnace taphole
CN117923884A (en) * 2024-03-20 2024-04-26 北京利尔高温材料股份有限公司 Vanadium-titanium stemming for blast furnace iron plugging port

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Cited By (7)

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Publication number Priority date Publication date Assignee Title
CN108675774A (en) * 2018-06-19 2018-10-19 佘春霞 A kind of environmentally friendly anhydrous stemming of mineral hot furnace
CN108911762A (en) * 2018-06-19 2018-11-30 佘春霞 A kind of blast furnace protecting wall building stemming
CN108794029A (en) * 2018-07-17 2018-11-13 北京瑞普同创科技发展有限公司 Titaniferous environmental-protection furnace stemming
CN109503173A (en) * 2018-11-30 2019-03-22 河南华西耐火材料有限公司 A kind of blast furnace cooling stave high-strength composite material, preparation method and its application in protection cooling wall
CN111233499A (en) * 2020-03-12 2020-06-05 巩义市芙豪冶金材料有限公司 SiC/C homogeneous material, stemming and preparation method thereof
CN113816728A (en) * 2021-06-23 2021-12-21 江苏新环美节能技术有限公司 Stemming for high-strength smelting super-huge blast furnace taphole
CN117923884A (en) * 2024-03-20 2024-04-26 北京利尔高温材料股份有限公司 Vanadium-titanium stemming for blast furnace iron plugging port

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Application publication date: 20171117