CN107641670A - A kind of blast furnace smelting method for reducing coke ratio and carrying high-coal ratio - Google Patents
A kind of blast furnace smelting method for reducing coke ratio and carrying high-coal ratio Download PDFInfo
- Publication number
- CN107641670A CN107641670A CN201710911705.2A CN201710911705A CN107641670A CN 107641670 A CN107641670 A CN 107641670A CN 201710911705 A CN201710911705 A CN 201710911705A CN 107641670 A CN107641670 A CN 107641670A
- Authority
- CN
- China
- Prior art keywords
- blast furnace
- coke
- vanadium
- coal
- smelting method
- 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
Links
Abstract
The present invention discloses a kind of blast furnace smelting method for reducing coke ratio and carrying high-coal ratio, and blast furnace smelting method includes：Vanadium-titanium magnitite sinter, vanadium titanium globe and nut coke ore deposit after sintered ore deposit inhibitor processing are well mixed, and form ore layer；Vanadium-titanium magnitite sinter accounts for the 60%~80% of iron furnace material gross mass in ore layer, and vanadium-titanium pellet accounts for the 20%~40% of iron furnace material gross mass；Coke and ore layer alternating cloth are entered into blast furnace, form the alternating layer assembling structure of ore layer and coke；By combustion adjuvant with and coal dust mix, obtain compound；Compound enters blast-furnace roasting through injection；It is calculated in mass percent, combustion adjuvant is made up of calcium oxide 35~38%, manganese dioxide 25%~35%, magnesia 22~25% and aluminium powder 8~12%；It is calculated in mass percent, combustion adjuvant quality is the 0.05~0.15% of ature of coal amount；Smelting process technical indicator is：416~456kg/tHM of coke ratio, nut coke are more oxygen-enriched than 132~152kg/tHM, 1150~1250 DEG C of blast temperature than 115~150kg/tHM, coal>2500m3/h；Blast furnace smelting method can reduce coke ratio, carry high-coal ratio, improve the usage factor of blast furnace.
Description
Technical field
The present invention relates to technical field of blast furnace process, and in particular to a kind of blast furnace process side for reducing coke ratio and carrying high-coal ratio
Method.
Background technology
Blast furnace smelting iron method generally mainly includes：Sefstromite concentrate and common fine ore are sintered and produce sintering deposit,
Pellet is produced with sefstromite concentrate and common iron concentrate pelletization, then, with coke. sintering deposit, pellet according to a certain percentage
It is added to together in blast furnace, while by Blast Furnace Injection coal dust and blasts air, fires coke and the coal dust of injection
Burning, generation reducing gas (mainly CO and H2), reducing gas removes the oxygen in vanadium titano-magnetite during rising in stove,
Reduction obtain iron, then dissolve drop onto cupola well realize slag, iron separation, so as to complete smelting process.
Wherein, blast furnace often smelts kilogram number of coke consumed in one ton of pig iron and represents that coke ratio is blast furnace ironmaking with coke ratio
Main economic and technical indices, concentrated expression blast furnace ironmaking raw material, fuel, the level of equipment and technical operation, coke ratio more it is low just
Represent that blast furnace working effect is better.At present, coke dosage is directly replaced using raising cheap fuel pulverized coal consumption, so as to reduce Jiao
Than improving the capacity factor of a blast furnace, but ineffective, the situation of reduction coke ratio effect difference be present.
The content of the invention
In view of this, this application provides a kind of blast furnace smelting method for reducing coke ratio and carrying high-coal ratio；The blast furnace process
Method can reduce coke ratio, carry high-coal ratio, improve the usage factor of blast furnace.
To solve above technical problem, technical scheme provided by the invention is a kind of blast furnace smelting for reducing coke ratio and carrying high-coal ratio
Smelting method, the blast furnace smelting method include：
Vanadium-titanium magnitite sinter, vanadium titanium globe and nut coke ore deposit after sintered ore deposit inhibitor processing are well mixed, and form ore layer；
Vanadium-titanium magnitite sinter described in ore layer accounts for the 60%~80% of iron furnace material gross mass, and the vanadium-titanium pellet accounts for iron furnace material gross mass
20%~40%；
Coke and ore layer alternating cloth are entered into blast furnace, form the alternating layer dress knot of the ore layer and the coke
Structure；
By combustion adjuvant with and coal dust mix, obtain compound；The compound enters blast-furnace roasting through injection；With quality hundred
Fraction meter, the combustion adjuvant by calcium oxide 35~38%, manganese dioxide 25%~35%, magnesia 22~25% and aluminium powder 8~
12% composition；It is calculated in mass percent, combustion adjuvant quality forms for the 0.05~0.15% of ature of coal amount；
Smelting process technical indicator is that coke ratio is：416~456kg/tHM of coke ratio, nut coke is than 115~150kg/tHM, coal ratio
132~152kg/tHM, 1150~1250 DEG C of blast temperature are oxygen-enriched>2500m3/h。
Preferably, the iron furnace material is made up of vanadium-titanium magnitite sinter and vanadium titanium globe.
Preferably, vanadium-titanium magnitite sinter described in the ore layer accounts for the 70% of the iron furnace material gross mass, the vanadium titanium ball
Nodulizing accounts for the 30% of the iron furnace material gross mass.
Preferably, the compound is with N2As pumped (conveying) medium.
Preferably, the granularity of the combustion adjuvant is below diameter 0.015mm more than 95%.
Preferably, it is calculated in mass percent, the combustion adjuvant is by calcium oxide 36%, manganese dioxide 30%, magnesia 24%
With aluminium powder 10%.
Preferably, mass percentage, activated aluminum mass fraction is not less than 98% in aluminium powder.
Preferably, it is calculated in mass percent, the combustion adjuvant quality is the 0.1% of the quality of pc.
Preferably, it is calculated in mass percent, the coal powder size is 150~180 mesh.
Preferably, the sintering deposit inhibitor component includes：Calcium chloride, magnesium chloride, borax, bromine and bleeding agent.
Preferably, it is calculated in mass percent, the sintering deposit inhibitor component includes：Calcium chloride 70%, magnesium chloride 12%,
Borax 10%, bromine 3% and bleeding agent 5%.
Preferably, it is calculated in mass percent, the bleeding agent is AEO.
Preferably, after the vanadium-titanium magnitite sinter after the processing of sintering deposit inhibitor by the sintering deposit inhibitor by being dissolved in water, spray
The surface treatment for being spread across vanadium-titanium magnitite sinter obtains.
Preferably, the sintering deposit inhibitor is dissolved in water process and is specially：The sintering deposit inhibitor and water are according to quality
Than for 4:100, mixing.
Compared with prior art, its detailed description is as follows by the application：
The present invention carries out cloth using the vanadium-titanium magnitite sinter after the processing of sintering deposit inhibitor, and sintering deposit inhibitor equably covers
Cover in agglomerate surface, the crack of vanadium-titanium magnitite sinter and hole, in blast furnace ironmaking process, hinder reducing gas and sintering deposit
Contact, reduction reaction substantially slow down, and make Fe2O3Protected, eliminate internal stress of the vanadium-titanium magnitite sinter in reduction process,
The low temperature reduction degradation index of vanadium-titanium magnitite sinter is reduced, ore layer gas permeability improves, and blast furnace permeability and gas utilization rate obtain
Improve, so that coke ratio reduces, than improving, furnace processor improves coal, and the usage factor of blast furnace improves.
The present invention carries out cloth using the alternating layer assembling structure of the ore layer and the coke layer, meanwhile, in ore layer
Middle addition nut coke, cloth is reasonable, improves nut coke ratio, and reduces coke ratio, and technique is simple, easy to spread.
The present invention by combustion adjuvant with and coal dust mix, obtain compound；Blast-furnace roasting is entered with mixture form injection, added
Fast oxidation reaction, Combustion Efficiency of Coal Powder is improved, effectively improves coal ratio；Meanwhile the combustion adjuvant is by calcium oxide, aluminium powder, titanium dioxide
Manganese and magnesia composition, on the one hand, calcium oxide, aluminium powder, manganese dioxide and magnesia par are easy to get, easy to spread；On the other hand,
The key that manganese dioxide has stronger combustion-supporting effect is that thermally decomposing release active oxygen adds coal powder ignition incipient flame spread speed
It hurry up, calcium oxide and magnesia have catalytic effect；A small amount of aluminium powder mixes with combustion adjuvant with coal dust, avoids exploding；Meanwhile reduce coal
The burning-point of powder, improve efficiency of combustion；The proportioning of the screening of combustion adjuvant component and proportioning, combustion adjuvant and coal dust, coal ratio is improved, this
Outside, present invention control coal powder size and combustion adjuvant diameter, further coal ratio.Coal dust substitutes part coke ratio, is reduced so as to play
The effect of coke ratio.
Embodiment
In order that those skilled in the art more fully understands technical scheme, with reference to specific embodiment pair
The present invention is described in further detail.
The invention provides a kind of blast furnace smelting method for reducing coke ratio and carrying high-coal ratio, the blast furnace smelting method includes：
Vanadium-titanium magnitite sinter, vanadium titanium globe and nut coke ore deposit after sintered ore deposit inhibitor processing are well mixed, and form ore layer；
Vanadium-titanium magnitite sinter described in ore layer accounts for the 60%~80% of iron furnace material gross mass, and the vanadium-titanium pellet accounts for iron furnace material gross mass
20%~40%；
Coke and ore layer alternating cloth are entered into blast furnace, form the alternating layer dress knot of the ore layer and the coke
Structure；
By combustion adjuvant with and coal dust mix, obtain compound；The compound enters blast-furnace roasting through injection；With quality hundred
Fraction meter, the combustion adjuvant by calcium oxide 35~38%, manganese dioxide 25%~35%, magnesia 22~25% and aluminium powder 8~
12% composition；It is calculated in mass percent, combustion adjuvant quality forms for the 0.05~0.15% of ature of coal amount；
Smelting process technical indicator is that coke ratio is：416~456kg/tHM of coke ratio, nut coke is than 115~150kg/tHM, coal ratio
132~152kg/tHM, 1150~1250 DEG C of blast temperature are oxygen-enriched>2500m3/h。
According to the present invention, it is preferred that the iron furnace material is made up of vanadium-titanium magnitite sinter and vanadium titanium globe.
According to the present invention, it is preferred that vanadium-titanium magnitite sinter described in the ore layer accounts for the 70% of the iron furnace material gross mass,
The vanadium-titanium pellet accounts for the 30% of the iron furnace material gross mass.Preferably, the compound is with N2As pumped (conveying) medium.
According to the present invention, it is preferred that the granularity of the combustion adjuvant is below diameter 0.015mm more than 95%.Preferably,
It is calculated in mass percent, the combustion adjuvant is by calcium oxide 36%, manganese dioxide 30%, magnesia 24% and aluminium powder 10%；It is preferred that
, mass percentage, activated aluminum mass fraction is not less than 98% in aluminium powder.Preferably, it is calculated in mass percent, it is described combustion-supporting
Agent quality is the 0.1% of the quality of pc.
According to the present invention, it is preferred that be calculated in mass percent, the coal powder size is 150~180 mesh.
According to the present invention, it is preferred that the sintering deposit inhibitor component includes：Calcium chloride, magnesium chloride, borax, bromine and
Bleeding agent.It is furthermore preferred that being calculated in mass percent, the sintering deposit inhibitor component includes：Calcium chloride 70%, magnesium chloride
12%th, borax 10%, bromine 3% and bleeding agent 5%.It is furthermore preferred that being calculated in mass percent, the bleeding agent is poly alkyl alcohol
Oxygen vinethene.
According to the present invention, it is preferred that the vanadium-titanium magnitite sinter after the processing of sintering deposit inhibitor is by by the sintering deposit inhibitor
After being dissolved in water, the surface treatment for being sprayed onto vanadium-titanium magnitite sinter obtains.It is furthermore preferred that the sintering deposit inhibitor is dissolved in water process tool
Body is：The sintering deposit inhibitor and water are 4 according to mass ratio:100, mixing.
Embodiment 1
Vanadium-titanium magnitite sinter after preparation of preparation processing：Sintering deposit inhibitor and water are 4 according to mass ratio:Sprayed after 100 mixing
The surface of vanadium-titanium magnitite sinter is spread across, obtains the vanadium-titanium magnitite sinter after the processing of sintering deposit inhibitor；It is calculated in mass percent, the burning
Knot ore deposit inhibitor component includes：Calcium chloride 70%, magnesium chloride 12%, borax 10%, bromine 3%, bleeding agent 5%；The infiltration
Agent is AEO；
Match iron furnace material and combustion adjuvant：Formula is shown in Table 1；Wherein, mass percentage, activated aluminum mass fraction is not in aluminium powder
Less than 98%.
Iron furnace material and combustion adjuvant are matched by table 1
Table 1
Embodiment 2~16
Nut coke is added in A~C iron furnace material, it is well mixed to form ore layer；Coke and the ore layer are replaced
Cloth enters blast furnace, forms the alternating layer assembling structure of the ore layer and the coke layer；By combustion adjuvant with and coal dust mix, obtain
Compound；The compound is with N2Enter blast-furnace roasting through injection as pumped (conveying) medium；Wherein, the granularity of combustion adjuvant is diameter
Below 0.015mm's is more than 95%, and the coal powder size is 150~180 mesh
It is 1150~1250 DEG C to control blast temperature, oxygen-enriched>2500m3/ h, smelt iron, calculated in slag under the conditions of shown in table 2
Iron content and the capacity factor of a blast furnace, the results are shown in Table 2.
Table 2
It the above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
The limitation of the present invention, protection scope of the present invention should be defined by claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made, these change
Enter and retouch and also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of blast furnace smelting method for reducing coke ratio and carrying high-coal ratio, it is characterised in that the blast furnace smelting method includes：
Vanadium-titanium magnitite sinter, vanadium titanium globe and nut coke ore deposit after sintered ore deposit inhibitor processing are well mixed, and form ore layer；Ore
Vanadium-titanium magnitite sinter accounts for the 60%~80% of iron furnace material gross mass described in layer, and the vanadium-titanium pellet accounts for iron furnace material gross mass
20%~40%；
Coke and ore layer alternating cloth are entered into blast furnace, form the alternating layer assembling structure of the ore layer and the coke；
By combustion adjuvant with and coal dust mix, obtain compound；The compound enters blast-furnace roasting through injection；With mass percent
Meter, the combustion adjuvant is by calcium oxide 35~38%, manganese dioxide 25%~35%, magnesia 22~25% and aluminium powder 8~12%
Composition；It is calculated in mass percent, combustion adjuvant quality is the 0.05~0.15% of ature of coal amount；
Smelting process technical indicator is：416~456kg/tHM of coke ratio, nut coke than 115~150kg/tHM, coal than 132~
152kg/tHM, 1150~1250 DEG C of blast temperature are oxygen-enriched>2500m3/h。
2. blast furnace smelting method according to claim 1, it is characterised in that vanadium-titanium magnitite sinter accounts for described in the ore layer
The 70% of the iron furnace material gross mass, the vanadium-titanium pellet account for the 30% of the iron furnace material gross mass.
3. blast furnace smelting method according to claim 1, it is characterised in that the compound is with N2As pumped (conveying) medium.
4. blast furnace smelting method according to claim 1, it is characterised in that the granularity of the combustion adjuvant is diameter
Below 0.015mm's is more than 95%.
5. being calculated in mass percent, the combustion adjuvant is by calcium oxide 36%, manganese dioxide 30%, magnesia 24% and aluminium powder 5%.
6. blast furnace smelting method according to claim 1, it is characterised in that mass percentage, active aluminum in aluminium powder
Measure fraction and be not less than 98%.
7. blast furnace smelting method according to claim 1, it is characterised in that be calculated in mass percent, the combustion adjuvant matter
Measure as the 0.1% of the quality of pc.
8. blast furnace smelting method according to claim 1, it is characterised in that the coal powder size is 150~180 mesh.
9. blast furnace smelting method according to claim 1, it is characterised in that the sintering deposit inhibitor component includes：Chlorine
Change calcium, magnesium chloride, borax, bromine and bleeding agent.
10. blast furnace smelting method according to claim 9, it is characterised in that be calculated in mass percent, the bleeding agent is
AEO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710911705.2A CN107641670A (en) | 2017-09-29 | 2017-09-29 | A kind of blast furnace smelting method for reducing coke ratio and carrying high-coal ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710911705.2A CN107641670A (en) | 2017-09-29 | 2017-09-29 | A kind of blast furnace smelting method for reducing coke ratio and carrying high-coal ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107641670A true CN107641670A (en) | 2018-01-30 |
Family
ID=61111708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710911705.2A Pending CN107641670A (en) | 2017-09-29 | 2017-09-29 | A kind of blast furnace smelting method for reducing coke ratio and carrying high-coal ratio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107641670A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110241276A (en) * | 2019-06-20 | 2019-09-17 | 成渝钒钛科技有限公司 | The technical method of blast furnace raising blast furnace coal ratio |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1401747A (en) * | 2002-10-10 | 2003-03-12 | 燕民才 | Spray blowing coal powder catalytic combustion adjuvant for blast furnace, and production method thereof |
| CN101235434A (en) * | 2008-02-28 | 2008-08-06 | 刘捷 | Sintering ore pulverization inhibitor |
| CN101724485A (en) * | 2008-10-21 | 2010-06-09 | 王全福 | Novel blast-furnace coal-injection combustion improver |
| CN102220440A (en) * | 2011-05-26 | 2011-10-19 | 攀钢集团有限公司 | Vanadium-titanium magnetite blast furnace smelting method capable of improving vanadium yield |
| CN103820590A (en) * | 2014-02-11 | 2014-05-28 | 东北大学 | Ore and coke mixed blast furnace smelting method for vanadium-titanium magnetite ore |
| CN105199806A (en) * | 2015-09-25 | 2015-12-30 | 江阴兴澄特种钢铁有限公司 | Combustion-supporting fire coal additive and use method thereof |
-
2017
- 2017-09-29 CN CN201710911705.2A patent/CN107641670A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1401747A (en) * | 2002-10-10 | 2003-03-12 | 燕民才 | Spray blowing coal powder catalytic combustion adjuvant for blast furnace, and production method thereof |
| CN101235434A (en) * | 2008-02-28 | 2008-08-06 | 刘捷 | Sintering ore pulverization inhibitor |
| CN101724485A (en) * | 2008-10-21 | 2010-06-09 | 王全福 | Novel blast-furnace coal-injection combustion improver |
| CN102220440A (en) * | 2011-05-26 | 2011-10-19 | 攀钢集团有限公司 | Vanadium-titanium magnetite blast furnace smelting method capable of improving vanadium yield |
| CN103820590A (en) * | 2014-02-11 | 2014-05-28 | 东北大学 | Ore and coke mixed blast furnace smelting method for vanadium-titanium magnetite ore |
| CN105199806A (en) * | 2015-09-25 | 2015-12-30 | 江阴兴澄特种钢铁有限公司 | Combustion-supporting fire coal additive and use method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110241276A (en) * | 2019-06-20 | 2019-09-17 | 成渝钒钛科技有限公司 | The technical method of blast furnace raising blast furnace coal ratio |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102220440B (en) | Vanadium-titanium magnetite blast furnace smelting method capable of improving vanadium yield | |
| CN103361453B (en) | Blast-furnace smelting method for vanadium-titanium magnetite | |
| CN104232822B (en) | The method of high-phosphor oolitic hematite vanadium titano-magnetite blast furnace ironmaking | |
| CN108070713B (en) | Iron ore sintering method using light-burned magnesium balls | |
| CN102251073B (en) | Deoxidizing and carburizing agent for semisteel, and preparation and application methods thereof | |
| CN101638698B (en) | Method for smelting vanadium-titanium magnetite by blast furnace | |
| CN104878143A (en) | Blast furnace smelting method of vanadium titano-magnetite | |
| CN104328242A (en) | Steelmaking method of high-phosphorus molten iron containing vanadium-titanium | |
| CN109576488A (en) | A method of sinter is produced using high proportion Bayan Obo iron ore concentrate | |
| CN104372127A (en) | Method for improving furnace maintenance efficiency of blast furnace | |
| CN104762429A (en) | Blast furnace smelting method | |
| CN103981362B (en) | A kind of sintering removes alkali-metal method | |
| CN106191351A (en) | A kind of method of blast furnace ironmaking | |
| CN104060009A (en) | Adding method of desulfurizer in blast furnace ironmaking process and application | |
| CN108950191B (en) | It is used to prepare the carbon-bearing lump and mixing preparation method for material of full concentrate sinter mixture | |
| CN111118284A (en) | F-containing sinter and production method thereof | |
| CN107488784A (en) | A kind of blast furnace ironmaking superfluxed pellets and its production method | |
| CN107641670A (en) | A kind of blast furnace smelting method for reducing coke ratio and carrying high-coal ratio | |
| CN104988305A (en) | Production process of acid sinter | |
| CN101538637B (en) | Molten iron demanganizing agent for silicon steel and manufacturing method thereof | |
| CN104419824B (en) | A kind of distributing method producing prereduced sinter | |
| RU2542050C1 (en) | Method for pyrometallurgical processing of iron-containing materials | |
| CN107043836A (en) | A kind of method of blast furnace ironmaking | |
| CN102505060B (en) | Method for smelting vanadium and titanium ore and smelting system | |
| CN103667688B (en) | Method for performing boron and iron separation on paigeite |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180130 |