CN101805194B - Furnace protecting agent for titanium concentrate sintering and preparation method thereof - Google Patents
Furnace protecting agent for titanium concentrate sintering and preparation method thereof Download PDFInfo
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- CN101805194B CN101805194B CN 201010126318 CN201010126318A CN101805194B CN 101805194 B CN101805194 B CN 101805194B CN 201010126318 CN201010126318 CN 201010126318 CN 201010126318 A CN201010126318 A CN 201010126318A CN 101805194 B CN101805194 B CN 101805194B
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Abstract
The invention discloses a furnace protecting agent for titanium concentrate sintering and a preparation method thereof, wherein the furnace protecting agent is prepared from the following components in proportion by weight: titanium dioxide (TiO2), a composition (CaO+MgO+SiO2+AL2O3) and total iron (TFe), and the preparation method comprises the following steps: selecting a titanium concentrate, compounding charcoal, mixing materials, distributing the materials, molding through sintering by a sintering machine and crushing, wherein the furnace wall at the eroded position of a furnace hearth is thinned, the temperature is lower than other regions to form a temperature gradient, and Ti (C, N) and attachments thereof are continuously accumulated and bonded at an eroded region until the temperature gradient relatively disappears under the action of the temperature gradient. The invention overcomes the abuse of large energy consumption due to unstable titanium content and high impurity content in the prior art, so that titanium carbonitride TiC, TiN or Ti(C,N) as an effective component can be generated by a blast furnace at the cost of minimum coke ratio, is formed in furnace hearth molten iron and is deposited on a working surface or in a brick joint at the eroded position of the furnace hearth to repair the eroded region to perform the action of protecting the furnace hearth.
Description
Technical field:
The present invention relates to a kind of blast furnace protecting material, particularly relate to a kind of titanium carbonitride blast furnace protecting agent and preparation method thereof.
Background technology:
Using the titaniferous material furnace retaining, is because reduction under hot conditions generates the high-melting-point compounds such as TiC, TiN or Ti (C, N), is deposited on the cupola well furnace bottom, and it is formed to protective layer.China's blast furnace successful Application titaniferous material furnace retaining technology, the furnace protecting agents such as schreyerite, titaniferous pelletizing have all been obtained good effect in the blast furnace Long Campaign Life Practice.Be noted that State of Blast Furnace labour latter stage, adopting the titaniferous material furnace retaining is the technical measures that extends blast furnace campaign.At present, the cooled agglomerated pellet of suppressing with higher-grade ilmenite and water glass bonding crude titaniferous concentrate carries out the furnace retaining operation and by the blast furnace operating person, is accepted and be widely used.Yet there is following shortcoming in this mode: 1) titanium dioxide only has part formation titanium carbonitride (Ti (C, N)) to play action of protecting furnace, and remainder enters in slag the waste that has caused titanium dioxide.2) increasing of the quantity of slag, must consume the corresponding coke energy, for the ash content in this part coke of balance also will consume flux, and is a kind of vicious cycle.
Summary of the invention:
The object of the invention is to for the deficiencies in the prior art, a kind of titanium carbonitride blast furnace protecting agent and preparation method thereof is provided, technical problem to be solved is rationally to determine composition and the content of furnace protecting agent, make the titanium carbonitride in furnace protecting agent fully play action of protecting furnace, rationally determine the preparation method of furnace protecting agent simultaneously, to guarantee the carbon nitriding rate of titanium, the technical solution used in the present invention is as follows:
A kind of titanium carbonitride blast furnace protecting agent is characterized in that being comprised of by weight ratio following composition:
Titanium dioxide TiO
245～55%;
Composition CaO+MgO+SiO
2+ AL
2o
31～10%;
Full iron Tfe is greater than 30%.
A kind of preparation method of titanium carbonitride blast furnace protecting agent is characterized in that:
(1) select the ilmenite concentrate of low silicon, low-sulfur, low-phosphorous, low calcium and magnesium, high titanium dioxide according to industry standard, ilmenite concentrate powder mean particle size reaches-200 meshes and is greater than 80%;
(2) join charcoal: allocate coke powder into according to 4～6% of ilmenite concentrate quality, the coke powder ash content is lower than 15%, and sulphur content is more low better, and mean particle size reaches-200 meshes and is greater than 30% titanium valve more to be fine into the ball effect better, is conducive to pellet sintering;
(3) batch mixing: mixing machine carries out batch mixing, moisture 8～10%, preferably add 2% wilkinite to do binding agent or other organic binder bonds, after the balling-up of ball dish, allocate the surface of ball into 1～2% coke powder as external combustion fuel according to the ilmenite concentrate quality again, the coke powder ash content is lower than 15%, and sulphur content is more low better, and the coke powder mean particle size reaches-200 meshes and is greater than 50%;
(4) through belt, the balling-up material is delivered to sintering machine distributing;
(5) sinter machine sinter molding;
(6) according to the customer requirement crushing and screening.
The present invention adds the blast furnace mode: furnace protecting agent of the present invention is mixed in pulverized coal injection into blast furna, coal dust with pulverized coal injection is sent into blast furnace, in several minutes after spraying into selection of time and tapping a blast furnace, time is more short better, this is due to titanium carbonitride (Ti (C, N)), than great, can make that titanium carbonitride (Ti (C, N)) has that enough time separates with other slag, cohesion, the lower backwardness infiltrate molten iron.The blast furnace protecting agent add-on of how many Ti (C, N) content requirement in molten iron being carried out to high-content titanium carbonitride (Ti (C, N)) according to the blast furnace operating person is regulated, until the molten iron result of laboratory test meets the blast furnace operating, the person requires.
Furnace retaining principle of the present invention: if a certain zone of cupola well is because erosion makes the furnace wall attenuate, this point outwards heat radiation is faster than other positions, thereby make this regional temperature lower than other regional temperatures, this zone will form certain thermograde with other zones so, under the effect of this thermograde, Ti (the C formed in molten iron, N) to erosion areas, move and polymerization, Ti (C, N) and dirt settling thereof will be in the continuous accumulation of erosion areas bonding until thermograde relatively disappear.
Compared with prior art, the present invention has overcome the deficiencies in the prior art, makes titanium carbonitride Ti (C, N) form and be deposited on cupola well in the cupola well molten iron and weathers among the working face or brickwork joint at position, repairs the effect that erosion areas plays the protection cupola well.
Embodiment:
A kind of titanium carbonitride blast furnace protecting agent is characterized in that being comprised of by weight ratio following composition:
Titanium dioxide TiO
245～55%
Composition CaO+MgO+SiO
2+ AL
2o
31～10%
Full iron Tfe is greater than 30%.
All iron content Tfe is greater than 30%, without reaching the standard grade requirement, according to client's requirement, is determined.
A kind of preparation method of titanium carbonitride blast furnace protecting agent is characterized in that:
(1) select the ilmenite concentrate of low silicon, low-sulfur, low-phosphorous, low calcium and magnesium, high titanium dioxide according to industry standard, the ilmenite concentrate powder mean particle size more than 80% reaches-200 meshes, and it is better that titanium valve more is fine into the ball effect, is conducive to pellet sintering.
Industry standard is as follows:
(2) join charcoal: allocate coke powder into according to 4～6% of ilmenite concentrate quality, the coke powder ash content is lower than 15%, and sulphur content is more low better, and the coke powder mean particle size more than 30% will reach-200 meshes;
(3) batch mixing: mixing machine carries out batch mixing, moisture 8～10%, preferably add 2% wilkinite to do binding agent or other organic binder bonds, after the balling-up of ball dish, allocate the surface of ball into 1～2% coke powder as external combustion fuel according to the ilmenite concentrate quality again, the coke powder ash content is lower than 15%, and sulphur content is more low better, and the coke powder mean particle size reaches-200 meshes and is greater than 50%;
(4) through belt, the balling-up material is delivered to sintering machine distributing;
(5) sinter machine sinter molding;
(6) according to the customer requirement crushing and screening.
Claims (1)
1. the preparation method of the furnace protecting agent of a titanium concentrate sintering, furnace protecting agent consists of by weight ratio following composition:
Titanium dioxide TiO
245～55%,
Composition CaO+MgO+SiO
2+ Al
2o
31～10%,
Full iron Tfe is greater than 30%,
It is characterized in that the preparation method comprises the steps:
(1) select the ilmenite concentrate of low silicon, low-sulfur, low-phosphorous, low calcium and magnesium, high titanium dioxide according to industry standard, what ilmenite concentrate powder mean particle size reached-200 meshes is greater than 80%;
(2) join charcoal: allocate coke powder into according to 4～6% of ilmenite concentrate quality, the coke powder ash content is lower than 15%, and sulphur content is more low better, and what mean particle size reached-200 meshes is greater than 30%;
(3) batch mixing: mixing machine carries out batch mixing, moisture 8～10%, add 2% wilkinite to make binding agent, after the balling-up of ball dish, allocate the surface of ball into 1～2% coke powder as external combustion fuel according to the ilmenite concentrate quality again, the coke powder ash content is lower than 15%, and sulphur content is more low better, and what the coke powder mean particle size reached-200 meshes is greater than 50%;
(4) through belt, the balling-up material is delivered to sintering machine distributing;
(5) sinter machine sinter molding;
(6) according to the customer requirement crushing and screening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010126318 CN101805194B (en) | 2010-03-13 | 2010-03-13 | Furnace protecting agent for titanium concentrate sintering and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010126318 CN101805194B (en) | 2010-03-13 | 2010-03-13 | Furnace protecting agent for titanium concentrate sintering and preparation method thereof |
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| CN101805194A CN101805194A (en) | 2010-08-18 |
| CN101805194B true CN101805194B (en) | 2013-05-08 |
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| CN 201010126318 Expired - Fee Related CN101805194B (en) | 2010-03-13 | 2010-03-13 | Furnace protecting agent for titanium concentrate sintering and preparation method thereof |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI422687B (en) * | 2010-12-09 | 2014-01-11 | China Steel Corp | Method for protecting hearth of blast furnace |
| CN102234199B (en) * | 2011-04-18 | 2013-01-23 | 西峡县新锦耐化有限责任公司 | High-titanium furnace protection stemming |
| CN102839241B (en) * | 2012-09-06 | 2014-12-10 | 莱芜钢铁集团有限公司 | Method for feeding titanium fine powder serviced as furnace protecting agent of blast furnace into furnace through injection system |
| CN102912066A (en) * | 2012-10-25 | 2013-02-06 | 莱芜钢铁集团有限公司 | Method for producing and adding blast furnace protection agent |
| CN103484664A (en) * | 2013-10-22 | 2014-01-01 | 成都天禄源商贸有限公司 | Titanium clinker for smelting high-titanium slag |
| CN106187234A (en) * | 2014-12-29 | 2016-12-07 | 张婷 | A kind of 2200m3blast furnace mud |
| CN112225541B (en) * | 2020-09-25 | 2022-06-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Electric furnace gunning material and gunning furnace protection method |
| CN112410485B (en) * | 2020-11-19 | 2021-07-20 | 福建三宝钢铁有限公司 | Low-titanium furnace protection process for blast furnace |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343674A (en) * | 2008-08-26 | 2009-01-14 | 攀枝花一立矿业股份有限公司 | High-titanium protection stove pellet ore and preparation thereof |
| CN101418371A (en) * | 2008-11-21 | 2009-04-29 | 攀钢集团成都钢铁有限责任公司 | Application of shaft furnace in baking full-vanadium ferrotitanium ore concentrate pellet ore |
| CN101613616A (en) * | 2009-07-31 | 2009-12-30 | 攀钢集团攀枝花钢铁研究院有限公司 | Coke for furnace protection and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6810069B2 (en) * | 2002-07-12 | 2004-10-26 | Mcgraw-Edison Company | Electrical arc furnace protection system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343674A (en) * | 2008-08-26 | 2009-01-14 | 攀枝花一立矿业股份有限公司 | High-titanium protection stove pellet ore and preparation thereof |
| CN101418371A (en) * | 2008-11-21 | 2009-04-29 | 攀钢集团成都钢铁有限责任公司 | Application of shaft furnace in baking full-vanadium ferrotitanium ore concentrate pellet ore |
| CN101613616A (en) * | 2009-07-31 | 2009-12-30 | 攀钢集团攀枝花钢铁研究院有限公司 | Coke for furnace protection and preparation method thereof |
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