CN106521060A - Titanium-containing powder for blast furnace protection and furnace protection method for injection through blast furnace coal injection system - Google Patents
Titanium-containing powder for blast furnace protection and furnace protection method for injection through blast furnace coal injection system Download PDFInfo
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- CN106521060A CN106521060A CN201610916982.8A CN201610916982A CN106521060A CN 106521060 A CN106521060 A CN 106521060A CN 201610916982 A CN201610916982 A CN 201610916982A CN 106521060 A CN106521060 A CN 106521060A
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- coal
- blast furnace
- titanium
- titanium valve
- injection
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/04—Blast furnaces with special refractories
- C21B7/06—Linings for furnaces
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
Abstract
The invention belongs to the technical field of blast furnace iron making, and particularly relates to titanium-containing powder for blast furnace protection and a blast furnace protection method for injecting the titanium-containing powder through a blast furnace coal injection system. The content of TiO2 in the titanium-containing powder ranges from 30 wt% to 90 wt%, and by weight percent, the titanium powder with the granularity being smaller than 200 meshes accounts for 40%-100%. The titanium-containing powder and pulverized coal are injected into a blast furnace together through the blast furnace coal injection system. The furnace protection method comprises the following steps that firstly, the titanium-containing powder and the pulverized coal are evenly mixed; and secondly, the titanium-coal mixture obtained after mixing is placed in an injection tank of the blast furnace coal injection system, conveyed to a blast furnace tuyere through an injection pipeline and finally injected into the blast furnace through the tuyere. When the titanium-containing powder is injected, normal coal injection is not stopped, the titanium-containing powder is injected evenly, and uniformity and stability of a blast furnace hearth are guaranteed; the pulverizing and injection processes do not need to be changed, the phenomenon of segregation of the pulverized coal and the titanium powder is not generated, the combustibility of titanium coal is not changed in comparison with the pulverized coal, and a mill and the injection system are not influenced.
Description
Technical field
The invention belongs to technical field of blast furnace ironmaking, more particularly to a kind of blast furnace protecting is with containing titanium valve and utilizing pulverized coal injection
System maintaining method for blast furnace of the injection containing titanium valve.
Background technology
Blast furnace crucible corrosion is the major hidden danger for threatening blast fumance safety, while being the main of the decision generation life of the blast furnace
Factor.The abnormal erosion of effective control blast furnace crucibe has become the important technology research objective of world's Iron industry.Control cupola well
One of measure of abnormal erosion is that blast furnace adds titanium furnace retaining, i.e., add into blast furnace and contain TiO2Material, using TiO2In blast furnace
The high-melting-point substances such as TiN, TiC and Ti (CN) are generated, is bondd at blast furnace crucible corrosion position, cupola well is effectively protected.
At present, the blast furnace titanium alloying manner for generally adopting be add from blast furnace roof it is various containing titanium valve, including：Ferrotianium lump ore,
High titanium pelletizing, titaniferous sintering deposit, titaniferous cold bound pellet, rutile, high titanium slag etc..Due to needing position to be protected in cupola well,
Therefore add from furnace roof and bring many impacts to blast furnace containing titanium valve, mainly accumulation bonding is easily formed in shaft, destroy smooth operation of furnace；
There is physics and the chemical reaction such as reduction and fusing in shaft, cohesive zone, dropping zone, affect blast furnace permeability and gas flow distribution；Contain
Titanium valve consumption is big, brings the quantity of slag and slag viscosity increase, causes the increase and slag iron discharge of blast furnace energy expenditure difficult；Finally lead
Furnace processor is caused to decline, fuel ratio is raised.Additionally, furnace roof adds the high-melting-point substances produced by titanium to be evenly distributed on cupola well molten iron
In, poor to the repairing effect of local erosion, repair time is long.
To solve the above problems, people had once carried out from blast-furnace tuyere and be directly added into the trial containing titanium valve and practice, including
High titanium content cored silk is fed from air port, or directly titanium fine powder is sprayed into from air port.These methods can be obtained directly invades to cupola well
The effect protected of erosion position, but exist and need air port to stop normal coal powder injection, add because local is a large amount of and make blast furnace containing titanium valve
The shortcomings of cupola well uniformity and stability suffer destruction.Therefore, such method is only limitted to blast furnace crucibe and the tight of Eroded occurs
Use during anxious and short time treatment, and range of application very little.
The content of the invention
For above-mentioned technical problem, it is an object of the invention to provide a kind of blast furnace road maintenance is with containing titanium valve and utilizing pulverized coal injection
System is blown the maintaining method for blast furnace containing titanium valve, and the method is spraying into while containing titanium valve, do not stopping normal coal powder injection, containing titanium valve
Injection is uniform, it is ensured that blast furnace crucibe uniformity and stability.
To achieve these goals, the invention provides following technical scheme：
The present invention provides a kind of blast furnace protecting with containing titanium valve, and this contains TiO in titanium valve2Content is 30～90wt%, less than 200
Mesh granularity accounts for 40～100wt%；This is contained titanium valve Jing bf coal injection systems and is sprayed in blast furnace together with coal dust.
It is described containing TiO in titanium valve2Content be 30～70wt%.
Ratio when blast furnace is sprayed into containing titanium valve is that, containing 1%～20wt% of titanium valve, remaining is coal dust.
It is described to be processed by ferrotianium lump ore, rutile, high titanium slag, sefstromite concentrate or ilmenite concentrate containing titanium valve.
The present invention provides a kind of furnace retaining method for being blown described bf coal injection systems of Jing containing titanium valve, the method include as
Lower step：
(1) above-mentioned furnace retaining, is then mixed homogeneously with coal dust through broken, screening in the following proportions with containing titanium valve：Titaniferous
1%～20wt% of powder, remaining is coal dust；
(2) by with being put into containing titanium valve in the injection tank of bf coal injection system, Jing injection pipelines are defeated with the furnace retaining of coal blending
Be sent to blast-furnace tuyere, most after Jing air ports spray guns spray in blast furnace.
In step (1), titanium valve will be contained using the pulverized coal preparation system of coal dust and mixed homogeneously with coal dust, be comprised the following steps that：
A, by the above-mentioned blending bunker for loading pulverized coal injection raw coal field containing titanium valve；Added by the charging gear of blending bunker orlop
To the main belt of raw coal, the run coal bin of powder processed is entered together with raw coal；
B, preliminary mixing is processed as mix homogeneously containing titanium valve and raw coal Jing coal pulverizers and cloth bag collection machine in the run coal bin
Titanium coal mixtures material, accounting containing titanium valve be 1wt%～20wt%.
To the blast furnace for having bi serie powder and injection system, the mode of titanium coal mixtures material injection has two kinds：
A. for the blast furnace crucibe protectiveness furnace retaining of low titanium addition, the injection of titanium coal mixtures material is carried out using single series；
B. for the blast furnace crucibe therapeutic furnace retaining of middle high titanium addition, the spray of titanium coal mixtures material is carried out using bi serie
Blow.
Compared with prior art, the beneficial effects of the present invention is：
The present invention is blown titanium coal mixtures material simultaneously using bf coal injection system, and the present invention need not change powder processed and injection stream
Journey, does not produce the segregation phenomena of coal dust and titanium valve, titanium burning of coal compared to coal dust also without change, to grinding machine and injection system
Without impact.The method is used for the routine servicing of blast furnace hearth and bottom, and the consumption of titanium valve is few, and onset time is short, and furnace roof can be avoided to add
The harmful effect that titanium is caused in shaft and cohesive zone, is to substitute the good method that furnace roof adds titanium furnace retaining.
Specific embodiment
The present invention is further described with reference to embodiment.
With containing titanium valve, this contains TiO in titanium valve to the blast furnace protecting of the present invention2Content is 30～90wt%, less than 200 mesh granularities
Account for 40～100wt%；This is contained titanium valve Jing bf coal injection systems and is sprayed in blast furnace together with coal dust.Containing titanium valve spray into blast furnace when
Ratio is that, containing 1%～20wt% of titanium valve, remaining is coal dust.It is described containing titanium valve by ferrotianium lump ore, rutile, high titanium slag, vanadium ferrotianium
Concentrate or ilmenite concentrate are processed.
The present invention is comprised the steps using bf coal injection system maintaining method for blast furnace of the injection containing titanium valve：
(1) titanium valve will be contained to mix homogeneously with coal dust；
(2) mixed titanium coal mixtures material is put in the injection tank of bf coal injection system, Jing injection pipelines are transported to
Blast-furnace tuyere, most after Jing air ports spray guns spray in blast furnace.
To ensure not affecting powder coal milling system and bf coal injection system normally to run containing titanium valve, this contains titanium valve for -200 mesh
Percentage by weight >=40%.
By ensureing from what blast-furnace tuyere was added to bring the working condition and blast furnace crucibe working condition in air port containing titanium valve
Impact it is minimum, it is described containing TiO in titanium valve2Mass percentage content >=30%.
To make to protect with addition of accurate, mix homogeneously, the flexible convenient, guarantee of injection control in bf coal injection system containing titanium valve
Stove effect, in step (1), will contain titanium valve using the pulverized coal preparation system of coal dust and mix homogeneously with coal dust, comprise the following steps that：
A, the blending bunker that titanium valve loading pulverized coal injection raw coal field will be contained；Original is added to by the charging gear of blending bunker orlop
The main belt of coal, enters the run coal bin of powder processed together with raw coal.
B, preliminary mixing is processed as mix homogeneously containing titanium valve and raw coal Jing coal pulverizers and cloth bag collection machine in the run coal bin
Titanium coal mixtures material, into Pulverized Coal Bin.It is 1%wt～20%wt containing proportion of the titanium valve in titanium coal.
To the blast furnace for having bi serie powder and injection system, the mode of titanium coal mixtures material injection has two kinds：
Mode one：The injection of titanium coal mixtures material is carried out using single series, it is adaptable to the blast furnace crucibe protection of low titanium addition
Property furnace retaining.
Mode two：The injection of titanium coal mixtures material is carried out using bi serie, it is adaptable in the blast furnace crucibe of high titanium addition control
The property treated furnace retaining.
Certain large blast furnace Jing tests are verified the present invention at home：The titanium valve composition for being adopted, granularity, proportioning, and spray
Blow mode as shown in table 1.
The mixed spray embodiment of 1 titanium coal of table
On the large blast furnace, the injection test of four embodiments has been carried out by table 1, demonstrated under different injection embodiments
Actual effect.Through the continuous injection of a period of time, the temperature drop trend of cupola well multilamellar thermocouple substantially, corrodes serious
Local temperature ascendant trend is effectively controlled.
Meanwhile, add titanium ore, blast furnace energy consumption to reduce in a large number because eliminating furnace roof, direct motion condition improvement, blast furnace items technology refer to
Mark mentions raising.Wherein, the technical specification of embodiment 2 improves numerical value and is：Furnace processor increases 217.5t/d, and coke ratio is reduced
14.4kg/t, coal reduce 11.5kg/t than raising 2.8kg/t, fuel ratio.
Actual production as shown by data, the furnace retaining that titanium coal mixes spray are with strong points, and the utilization rate of titanium is greatly improved, TiO in slag2Contain
Amount declines to a great extent, and brings good economic benefit.
Claims (7)
1. a kind of blast furnace protecting is with containing titanium valve, it is characterised in that：This contains TiO in titanium valve2Content is 30～90wt%, less than 200 mesh
Granularity accounts for 40～100wt%；This is contained titanium valve Jing bf coal injection systems and is sprayed in blast furnace together with coal dust.
2. blast furnace protecting according to claim 1 is with containing titanium valve, it is characterised in that：It is described containing TiO in titanium valve2Content be
30～70wt%.
3. blast furnace protecting according to claim 1 is with containing titanium valve, it is characterised in that：Containing ratio during titanium valve penetrating blast furnace it is
Containing 1%～20wt% of titanium valve, remaining is coal dust.
4. blast furnace protecting according to claim 1 is with containing titanium valve, it is characterised in that：It is described containing titanium valve by ferrotianium lump ore, gold
Red stone, high titanium slag, sefstromite concentrate or ilmenite concentrate are processed.
5. a kind of furnace retaining method that bf coal injection systems of Jing containing titanium valve by described in claim 1 are blown, it is characterised in that：The party
Method comprises the steps：
(1) above-mentioned furnace retaining, is then mixed homogeneously with coal dust through broken, screening in the following proportions with containing titanium valve：Containing titanium valve 1%
～20wt%, remaining is coal dust；
(2) by with being put into containing titanium valve in the injection tank of bf coal injection system, Jing injection pipelines are transported to the furnace retaining of coal blending
Blast-furnace tuyere, most after Jing air ports spray guns spray in blast furnace.
6. furnace retaining method according to claim 5, it is characterised in that：In step (1), will be contained using the pulverized coal preparation system of coal dust
Titanium valve is mixed homogeneously with coal dust, comprises the following steps that：
A, by the above-mentioned blending bunker for loading pulverized coal injection raw coal field containing titanium valve；Original is added to by the charging gear of blending bunker orlop
The main belt of coal, enters the run coal bin of powder processed together with raw coal；
B, the titanium that mix homogeneously is processed as containing titanium valve and raw coal Jing coal pulverizers and cloth bag collection machine tentatively mixed in run coal bin
Coal mixtures material, accounting containing titanium valve are 1wt%～20wt%.
7. furnace retaining method according to claim 5, it is characterised in that：To the blast furnace for having bi serie powder and injection system,
The mode of titanium coal mixtures material injection has two kinds：
A. for the blast furnace crucibe protectiveness furnace retaining of low titanium addition, the injection of titanium coal mixtures material is carried out using single series；
B. for the blast furnace crucibe therapeutic furnace retaining of middle high titanium addition, the injection of titanium coal mixtures material is carried out using bi serie.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610916982.8A CN106521060A (en) | 2016-10-20 | 2016-10-20 | Titanium-containing powder for blast furnace protection and furnace protection method for injection through blast furnace coal injection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610916982.8A CN106521060A (en) | 2016-10-20 | 2016-10-20 | Titanium-containing powder for blast furnace protection and furnace protection method for injection through blast furnace coal injection system |
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| CN106521060A true CN106521060A (en) | 2017-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610916982.8A Pending CN106521060A (en) | 2016-10-20 | 2016-10-20 | Titanium-containing powder for blast furnace protection and furnace protection method for injection through blast furnace coal injection system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107794322A (en) * | 2017-11-10 | 2018-03-13 | 翟丹 | A kind of blast furnace blowing titaniferous furnace retaining material and preparation method thereof |
| CN110283951A (en) * | 2019-08-05 | 2019-09-27 | 安徽工业大学 | A method of promote titanium nitride during blast furnace process high-purity pig iron to be precipitated in furnace |
| CN110283952A (en) * | 2019-08-05 | 2019-09-27 | 安徽工业大学 | A kind of blast furnace process high-purity pig iron molten iron nitrogen promoter and increasing method for nitrogen |
| CN110283950A (en) * | 2019-08-05 | 2019-09-27 | 安徽工业大学 | Method for removing titanium in furnace during a kind of blast furnace process high-purity pig iron |
| CN112410485A (en) * | 2020-11-19 | 2021-02-26 | 福建三宝钢铁有限公司 | Low-titanium furnace protection process for blast furnace |
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Patent Citations (5)
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107794322A (en) * | 2017-11-10 | 2018-03-13 | 翟丹 | A kind of blast furnace blowing titaniferous furnace retaining material and preparation method thereof |
| CN107794322B (en) * | 2017-11-10 | 2019-04-02 | 翟丹 | A kind of blast furnace blowing titaniferous furnace retaining material and preparation method thereof |
| CN110283951A (en) * | 2019-08-05 | 2019-09-27 | 安徽工业大学 | A method of promote titanium nitride during blast furnace process high-purity pig iron to be precipitated in furnace |
| CN110283952A (en) * | 2019-08-05 | 2019-09-27 | 安徽工业大学 | A kind of blast furnace process high-purity pig iron molten iron nitrogen promoter and increasing method for nitrogen |
| CN110283950A (en) * | 2019-08-05 | 2019-09-27 | 安徽工业大学 | Method for removing titanium in furnace during a kind of blast furnace process high-purity pig iron |
| CN112410485A (en) * | 2020-11-19 | 2021-02-26 | 福建三宝钢铁有限公司 | Low-titanium furnace protection process for blast furnace |
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Application publication date: 20170322 |