CN110106299A - A kind of blast furnace smelting method of vanadium titano-magnetite - Google Patents
A kind of blast furnace smelting method of vanadium titano-magnetite Download PDFInfo
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- CN110106299A CN110106299A CN201910436060.0A CN201910436060A CN110106299A CN 110106299 A CN110106299 A CN 110106299A CN 201910436060 A CN201910436060 A CN 201910436060A CN 110106299 A CN110106299 A CN 110106299A
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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
- C21B5/008—Composition or distribution of the charge
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
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Abstract
The present invention provides a kind of blast furnace smelting method of vanadium titano-magnetite, in the blast furnace ironmaking process of vanadium titano-magnetite, the vanadium titano-magnetite raw material includes 60%~75% sinter, 0%~15% common pellet, 5%~15% vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine and 5%~15% lump ore.The present invention changes traditional burden structure, hence it is evident that improves the reflow conductor roll, dropping performance and permeability of blast furnace burden, and reduces the coke ratio in blast furnace ironmaking process.
Description
Technical field
The invention belongs to metallurgical technology field more particularly to a kind of blast furnace smelting methods of vanadium titano-magnetite.
Background technique
Currently, blast-furnace smelting method for vanadium titano-magnetite, which is specifically included that, is sintered life for sefstromite concentrate and common fine ore
Output sinter produces pellet with sefstromite concentrate and common iron concentrate pelletization, then sinter, pellet and a small amount of block
Mine according to a certain percentage, is added in blast furnace together with coke, while by Blast Furnace Injection coal dust and blasting air, makes coke
Charcoal and the coal dust of blowing burn, and generate reducing gas (mainly CO and H2), during reducing gas rises in furnace
The oxygen in vanadium titano-magnetite is removed, reduction obtains iron, and then fusing drops onto cupola well and realizes slag iron separation, to complete to smelt
Journey.
In blast furnace ironmaking process, lump zone, cohesive zone, dropping zone, combustion zone and slag iron accumulation regions can be divided into from top to bottom
Five regions.Wherein, there are extremely the gas fluid distrbution of blast furnace, gas permeability and reduction process in the shape of cohesive zone and position
Important influence.And the softening of furnace charge and meltdrop characteristic play conclusive effect to the formation of cohesive zone, shape and position.Furnace
Material softening start temperature is high, and cohesive zone is narrow and tends to move down, and melt-dropping property is good；Furnace charge softening start temperature is low, soft heat section is wide
Furnace charge resistance that coal gas is generated it is big, permeability of stock column is poor, and air flow method is uneven, is unfavorable for the strengthening smelting of blast furnace.
Carbonaceous pelletizing is a kind of New Type of Carbon iron furnace material, and Carbon Composite Iron Ore Hot Briquette is one kind of carbonaceous pelletizing, is a kind of using coal
Caking property coal dust and iron content powder are sticked into caked novel high-quality iron-smelting raw material, avoid the use of binder.In blast furnace
In, Carbon Composite Iron Ore Hot Briquette has the advantage that the gasification of carbon and the reduction reaction of ferriferous oxide in carbonaceous pelletizing while carrying out
And mutually promote, coupling effect is generated, the reduction of iron-containing charge in blast furnace is accelerated；The iron particle newly restored in hot pressing pelletizing
It is come into full contact with tiny carbon particle, accelerates carburizing, soft melting dropping low-temperature range will be substantially reduced compared with sinter, out
The temperature of iron can also be reduced accordingly, and therefore, blast furnace ironmaking process can be carried out in lower temperature levels, referred to as " low temperature ironmaking ".
Therefore, in order to improve the softening of furnace charge and meltdrop characteristic in blast furnace process, it is high to need a kind of new vanadium titano-magnetite
Furnace smelting process.
Summary of the invention
(1) technical problems to be solved
In order to solve the above problem of the prior art, the present invention provides a kind of blast furnace smelting methods of vanadium titano-magnetite.
Change traditional burden structure, hence it is evident that improve the reflow conductor roll, dropping performance and permeability of blast furnace burden, and reduce
Coke ratio in blast furnace ironmaking process.
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include:
A kind of blast furnace smelting method of vanadium titano-magnetite, during vanadium titano-magnetite blast furnace process, vanadium titano-magnetite
Raw material includes 60%~75% sinter, 0%~15% common pellet, 5%~15% vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine
With 5%~15% lump ore.
As a kind of improvement of blast-furnace smelting method for vanadium titano-magnetite of the present invention, vanadium titano-magnetite raw material includes 60%~
75% sinter, 0%~10% common pellet, 10%~15% vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine and 5%~15% piece
Mine.
As a kind of improvement of blast-furnace smelting method for vanadium titano-magnetite of the present invention, vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine is pressed
Weight fraction meter includes following components: 22%~28% bituminous coal, 4%~7% lean coal, 0%~62.5% common vanadium titanium
Mine and 10%~67.5% vanadium titanium sea sand mine.
As a kind of improvement of blast-furnace smelting method for vanadium titano-magnetite of the present invention, vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine is pressed
Weight fraction meter includes following components: 26%~28% bituminous coal, 4%~6% lean coal, 26%~50% common schreyerite
With 20%~40% vanadium titanium sea sand mine.
As a kind of improvement of blast-furnace smelting method for vanadium titano-magnetite of the present invention, vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine by with
Lower preparation method prepares:
Step S1, drying and grind away processing are successively carried out to vanadium titanium sea sand mine, common schreyerite, bituminous coal and lean coal；Then
According to the component proportion of vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette in claim 3 or 4, vanadium titanium sea sand mine, common vanadium titanium are uniformly mixed
Mine, bituminous coal and lean coal obtain mixed material.
Step S2, then heating mixed material is suppressed to 250~350 DEG C, obtains hot wafering.
Step S3, under inert atmosphere protection, hot wafering is heat-treated, heat treatment temperature is at 500 DEG C or more, at heat
The reason time is 4~6h, obtains vanadium titanium sea sand mine Carbon Composite Iron Ore Hot Briquette.
As a kind of improvement of blast-furnace smelting method for vanadium titano-magnetite of the present invention, in step S1, that treated is common for grind away
150 mesh of granularity < of schreyerite；200 mesh of granularity < of grind away treated vanadium titanium sea sand mine.
(3) beneficial effect
The beneficial effects of the present invention are:
Vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine is used to substitute traditional blast furnace burden (sinter, common pelletizing with certain proportion
Mine and lump ore) in common pellet, have following effect: 1, soften start temperature it is lower, softening finishing temperature it is higher, that is, have
Schreyerite is improved in the reducing degree of upper blast furnace, is avoided for improving schreyerite gas-solid reduction in wider softening temperature section
Hearth accumulation, the load for reducing bottom house are of great significance；2, make the molten temperature region constriction of blast furnace burden, improve high
The meltdown property of furnace furnace charge；3, blast furnace burden fusing start temperature is high, cohesive zone (furnace charge from the region for starting to be melted to drippage)
Narrow and tend to move down, softening and meltdrop characteristic are good；4, vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine is in comprehensive furnace charge middle skeleton effect
Obviously, the gas permeability of blast furnace burden is substantially improved；5, improve the dropping performance of blast furnace burden.
The present invention develops a kind of novel furnace charge, changes traditional burden structure, and this new furnace charge is carbon containing furnace charge, drop
Coke ratio in low blast furnace ironmaking process.
Detailed description of the invention
Fig. 1 is that melting experiment device figure is restored in the specific embodiment of the invention；
Fig. 2 is the property of softening of the adding proportion to blast furnace burden of sea sand Carbon Composite Iron Ore Hot Briquette in the specific embodiment of the invention
It can influence diagram；
Fig. 3 is the adding proportion of sea sand Carbon Composite Iron Ore Hot Briquette in the specific embodiment of the invention to blast furnace burden characteristic value S
Influence diagram；
Fig. 4 is the adding proportion of sea sand Carbon Composite Iron Ore Hot Briquette in the specific embodiment of the invention to blast furnace burden cohesive zone position
The influence diagram set.
[description of symbols]
1: displacement measurement apparatus；2: loading setter；3: temperature measuring apparatus；4: gas outlet；5: reduction tube；6: heating
Furnace body；7: the first coke layers；8: graphite crucible；9: iron-containing charge；10: the second coke layers；11: support tube；12: air pressure valve；13:
Specimen collection container；14: air inlet.
Specific embodiment
In order to preferably explain the present invention, in order to understand, below by specific embodiment, present invention work is retouched in detail
It states.
Percentage used in the specific embodiment of the invention is unless otherwise specified weight percent.
The present invention provides a kind of blast furnace smelting method of vanadium titano-magnetite, vanadium titano-magnetite raw material used in this method
Include 60%~75% sinter, 0%~15% common pellet, 5%~15% vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine and 5%
~15% lump ore.
Inventors have found that vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine is used to substitute traditional blast furnace burden (sintering with certain proportion
Mine, common pellet and lump ore) in common pellet, have following effect: 1, soften start temperature it is lower, soften finishing temperature
It is higher, that is, there is wider softening temperature section, for improving schreyerite gas-solid reduction, improve schreyerite going back in upper blast furnace
Former degree, avoids hearth accumulation, and the load for reducing bottom house is of great significance；2, make the molten temperature region of blast furnace burden
Constriction improves the meltdown property of blast furnace burden；3, blast furnace burden fusing start temperature is high, and (furnace charge is from starting to be melted to for cohesive zone
The region of drippage) narrow and tends to move down, softening and meltdrop characteristic are good；4, vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine is in comprehensive furnace charge
Middle skeleton effect is obvious, substantially improves the gas permeability of blast furnace burden；5, improve the dropping performance of blast furnace burden.
In order to preferably achieve the object of the present invention, it is preferable that vanadium titano-magnetite raw material includes 60% in the method for the present invention
~75% sinter, 0%~10% common pellet, 10%~15% vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine and 5%~15%
Lump ore.Preferably, vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine, by weight score meter include following components: 22%~28% bituminous coal,
4%~7% lean coal, 0%~62.5% common schreyerite and 10%~67.5% vanadium titanium sea sand mine.The vanadium titanium sea sand heat
It presses the compression strength of carbonaceous pelletizing in 3000N or more, there is excellent reduction swellability performance and reduction intensity, and substantially without dusting
Phenomenon,
Meet the industrially requirement to Carbon Composite Iron Ore Hot Briquette compression strength.
It is further preferred that vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine score meter by weight includes following components: 26%~
28% bituminous coal, 4%~6% lean coal, 26%~50% common schreyerite and 20%~40% vanadium titanium sea sand mine.
In the present invention, sinter is obtained by common iron ore concentrate and schreyerite mixed sintering, and preparation method is ability
Known to field technique personnel.Common pellet is that common iron ore concentrate, schreyerite and binder mixing are roasted after pelletizing and obtained,
Preparation method is well known to those skilled in the art.Lump ore is iron ore concentrate.
Vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette can be prepared by following preparation method:
Step S1, drying and grind away processing are successively carried out to vanadium titanium sea sand mine, common schreyerite, bituminous coal and lean coal；Then
According to the component proportion of above-mentioned vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette, vanadium titanium sea sand mine, common schreyerite, bituminous coal and thin are uniformly mixed
Coal obtains mixed material.
Step S2, then heating mixed material is suppressed to 250~350 DEG C, obtains hot wafering.
Step S3, under inert atmosphere protection, the hot wafering is heat-treated, heat treatment temperature at 500 DEG C or more,
Heat treatment time is 4~6h, obtains vanadium titanium sea sand mine Carbon Composite Iron Ore Hot Briquette.
In step S3, after heat treatment temperature is greater than 500 DEG C, treated, and sea sand hot wafering compression strength be can reach
3000N, and with the extension of the heat treatment time to sea sand hot wafering, the compression strength of sea sand hot wafering first increases to drop afterwards
Low, when heat treatment time is within the scope of 4-6h, treated, and sea sand hot wafering compression strength can reach 3000N, meet work
To the requirement of Carbon Composite Iron Ore Hot Briquette compression strength in industry.
Preferably, in step S1,150 mesh of granularity < of grind away treated common schreyerite；Grind away treated vanadium titanium
200 mesh of granularity < of sea sand mine.
The invention will be further described with reference to embodiments, but the scope of the present invention is not limited in following implementation
Example.
In following embodiment, comparative example, sinter used, common pellet, vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine and
The chemical component of lump ore is shown in Table 1.
1 sinter of table, common pellet, vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette and lump ore chemical component/%
In embodiment and comparative example, the high temperature metallurgical properties of blast furnace burden are investigated using reduction melting experiment.
Restore melting experiment the following steps are included:
Step A1, the coke grain that one layer of 30mm thickness is spread in the graphite crucible bottom that internal diameter is 75mm, by embodiment after pressing
Or the blast furnace burden in comparative example is put into graphite crucible, so that blast furnace burden is evenly distributed through jog, jolt ramming, then in State of Blast Furnace
Material places into coke above.
Step A2, the graphite crucible for installing blast furnace burden is placed in the reduction tube of sealing, heating is carried out to reduction tube and is added
Heat, as shown in Figure 1；Heating heating uses three sections of alternating temperature temperature increasing schedules, i.e. 0-900 DEG C of heating rate is 10 DEG C/min, 900-
1020 DEG C of heating rates are 3 DEG C/min, and heating rate is 5 DEG C/min, measurement softening start temperature T after 1020 DEG C4, softening eventually
Temperature T40, fusing start temperature TS, droplet temperature (fusing finishing temperature) TD, maximum differential pressure Δ PmaxWith maximum differential pressure temperature
TΔP；And reduction tube upper and lower level pressure difference variation with temperature curve in temperature-rise period is obtained, according to change curve and abscissa temperature
Spend surrounded areal calculation characteristic value S.
Define T4Temperature when for shrinking percentage being 4%, T40Temperature when for shrinking percentage being 40%, TSRise for pressure difference most acute
Strong temperature.Characteristic value S is smaller, and gas permeability is better.
Embodiment 1
Step S1, vanadium titanium sea sand mine, common schreyerite, bituminous coal and lean coal are dried, then grinds common schreyerite
To 150 mesh of its granularity <, vanadium titanium sea sand mine is ground to 200 mesh of its granularity <；Later, uniformly mixing 40% vanadium titanium sea sand mine,
27.5% common schreyerite, 27.5% bituminous coal and 5% lean coal, obtain mixed material.
Step S2, then heating mixed material is suppressed to 300 DEG C, obtains hot wafering.
Step S3, under inert atmosphere protection, hot wafering is heat-treated, heat treatment temperature is 500 DEG C, when heat treatment
Between be 6h, obtain vanadium titanium sea sand mine Carbon Composite Iron Ore Hot Briquette.By vanadium titanium sea sand mine hot pressing in GB/T 14201-93 detection embodiment 1
The compression strength of carbonaceous pelletizing is 3196N.
Step S4, according to 70% sinter, 15% common pellet, 5% vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine and 10%
Lump ore prepares blast furnace burden, carries out reduction melting experiment.
Measure the T of blast furnace burden in embodiment 14It is 1130.35 DEG C, T40It is 1237.28 DEG C, calculates softening temperature section
T40—T4It is 106.83 DEG C；Measure TSIt is 1260.45 DEG C, TDIt is 1378.36 DEG C, calculates softening molten temperature region TD—TSFor
117.91℃；Measure TΔPIt is 1275.75 DEG C；The characteristic value S for measuring blast furnace burden is 1838.4kPa DEG C.
Embodiment 2
Using the vanadium titanium sea sand mine Carbon Composite Iron Ore Hot Briquette being prepared in embodiment 1, commonly according to 70% sinter, 10%
Pellet, 10% vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine and 10% lump ore prepare blast furnace burden, carry out reduction melting experiment.
Measure the T of blast furnace burden in embodiment 24It is 1129.50 DEG C, T40It is 1246.05 DEG C, calculates softening temperature section
T40—T4It is 116.55 DEG C；Measure TSIt is 1273.89 DEG C, TDIt is 1384.46 DEG C, calculates softening molten temperature region TD—TSFor
110.57℃；Measure TΔPIt is 1283.91 DEG C；The characteristic value S for measuring blast furnace burden is 1951.0kPa DEG C.
Embodiment 3
Using the vanadium titanium sea sand mine Carbon Composite Iron Ore Hot Briquette being prepared in embodiment 1, commonly according to 70% sinter, 5%
Pellet, 15% vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine and 10% lump ore prepare blast furnace burden, carry out reduction melting experiment.
Measure the T of blast furnace burden in embodiment 34It is 1125.26 DEG C, T40It is 1244.87 DEG C, calculates softening temperature section
T40—T4It is 119.61 DEG C；Measure TSIt is 1276.82 DEG C, TDIt is 1398.24 DEG C, calculates softening molten temperature region TD—TSFor
121.42℃；Measure TΔPIt is 1312.31 DEG C；The characteristic value S for measuring blast furnace burden is 1396.2kPa DEG C.
Comparative example 1
According to 70% sinter, 20% common pellet and 10% lump ore, prepare blast furnace burden, it is real to carry out reduction fusing
It tests.
Measure the T of blast furnace burden in comparative example 14It is 1141.65 DEG C, T40It is 1233.68 DEG C, calculates softening temperature section
T40—T4It is 92.03 DEG C；Measure TSIt is 1258.71 DEG C, TDIt is 1377.31 DEG C, calculates softening molten temperature region TD—TSFor
118.60℃；Measure TΔPIt is 1293.09 DEG C；The characteristic value S for measuring blast furnace burden is 2254.7kPa DEG C.
In conclusion blast furnace burden softening start temperature is lower in the embodiment of the present invention 1 to 3, softening in conjunction with comparative example 1
Finishing temperature is higher, that is, has wider softening temperature section, for improving schreyerite gas-solid reduction, improves schreyerite in blast furnace
The reducing degree on top, avoids hearth accumulation, and the load for reducing bottom house is of great significance, as shown in Figure 2；Blast furnace burden
It is high to melt start temperature, cohesive zone narrows and tends to move down, and softening and meltdrop characteristic are good as shown in Figure 3；Blast furnace burden characteristic value S
It is obviously lower, vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine is obvious in comprehensive furnace charge middle skeleton effect, substantially improves blast furnace burden
Gas permeability, as shown in Figure 4.It can as it can be seen that adding a certain proportion of vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine into traditional blast furnace burden
It is obviously improved the reflow conductor roll, dropping performance and permeability of blast furnace burden.
Embodiment 4
Using the vanadium titanium sea sand mine Carbon Composite Iron Ore Hot Briquette being prepared in embodiment 1, commonly according to 75% sinter, 0%
Pellet, 15% vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine and 10% lump ore prepare blast furnace burden, carry out reduction melting experiment.
Measure the T of blast furnace burden in embodiment 44It is 1121.6 DEG C, T40It is 1255.5 DEG C, calculates softening temperature section T40—
T4It is 133.9 DEG C；Measure TSIt is 1284.2 DEG C, TDIt is 1411.6 DEG C, calculates softening molten temperature region TD—TSIt is 127.4 DEG C；
Measure TΔPIt is 1295.8 DEG C；The characteristic value S for measuring blast furnace burden is 1709.8kPa DEG C.
Embodiment 5
Using the vanadium titanium sea sand mine Carbon Composite Iron Ore Hot Briquette being prepared in embodiment 1, commonly according to 60% sinter, 10%
Pellet, 15% vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine and 15% lump ore prepare blast furnace burden, carry out reduction melting experiment.
Measure the T of blast furnace burden in embodiment 54It is 1127.3 DEG C, T40It is 1245.8 DEG C, calculates softening temperature section T40—
T4It is 118.5 DEG C；Measure TSIt is 1270.9 DEG C, TDIt is 1395.8 DEG C, calculates softening molten temperature region TD—TSIt is 124.9 DEG C；
Measure TΔPIt is 1306.5 DEG C；The characteristic value S for measuring blast furnace burden is 1589.5kPa DEG C.
Embodiment 6
Using the vanadium titanium sea sand mine Carbon Composite Iron Ore Hot Briquette being prepared in embodiment 1, commonly according to 75% sinter, 5%
Pellet, 15% vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine and 5% lump ore prepare blast furnace burden, carry out reduction melting experiment.
Measure the T of blast furnace burden in embodiment 64It is 1110.9 DEG C, T40It is 1250.8 DEG C, calculates softening temperature section T40—
T4It is 139.9 DEG C；Measure TSIt is 1278.5 DEG C, TDIt is 1396.6 DEG C, calculates softening molten temperature region TD—TSIt is 118.1 DEG C；
Measure TΔPIt is 1300.6 DEG C；The characteristic value S for measuring blast furnace burden is 1687.3kPa DEG C.
The technical principle that detailed description of the preferred embodimentsthe present invention has been described is combined above.These descriptions are intended merely to explain the present invention
Principle, and shall not be construed in any way as a limitation of the scope of protection of the invention.Based on the explanation herein, art technology
Personnel, which do not need to make the creative labor, can associate other specific embodiments of the invention, these modes fall within this
Within the protection scope of invention.
Claims (6)
1. a kind of blast furnace smelting method of vanadium titano-magnetite, which is characterized in that during vanadium titano-magnetite blast furnace process, institute
Stating vanadium titano-magnetite raw material includes 60%~75% sinter, 0%~15% common pellet, 5%~15% vanadium titanium sea sand heat
Press carbonaceous pelletizing mine and 5%~15% lump ore.
2. the blast furnace smelting method of vanadium titano-magnetite according to claim 1, which is characterized in that the vanadium titano-magnetite is former
Material comprising 60%~75% sinter, 0%~10% common pellet, 10%~15% vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette mine and
5%~15% lump ore.
3. the blast furnace smelting method of vanadium titano-magnetite according to claim 1 or 2, which is characterized in that the vanadium titanium sea sand
Carbon Composite Iron Ore Hot Briquette mine, by weight score meter include following components: 22%~28% bituminous coal, 4%~7% lean coal, 0%~
62.5% common schreyerite and 10%~67.5% vanadium titanium sea sand mine.
4. the blast furnace smelting method of vanadium titano-magnetite according to claim 3, which is characterized in that the vanadium titanium sea sand hot pressing
Carbonaceous pelletizing mine, by weight score meter include following components: 26%~28% bituminous coal, 4%~6% lean coal, 26%~
50% common schreyerite and 20%~40% vanadium titanium sea sand mine.
5. the blast furnace smelting method of vanadium titano-magnetite according to claim 4, which is characterized in that the vanadium titanium sea sand hot pressing
Carbonaceous pelletizing mine is prepared by following preparation method:
Step S1, drying and grind away processing are successively carried out to vanadium titanium sea sand mine, common schreyerite, bituminous coal and lean coal；Then according to
The component proportion of vanadium titanium sea sand Carbon Composite Iron Ore Hot Briquette in claim 3 or 4 uniformly mixes vanadium titanium sea sand mine, common schreyerite, cigarette
Coal and lean coal obtain mixed material；
Step S2, the mixed material is heated to 250~350 DEG C, is then suppressed, obtains hot wafering；
Step S3, under inert atmosphere protection, the hot wafering is heat-treated, heat treatment temperature is at 500 DEG C or more, at heat
The reason time is 4~6h, obtains vanadium titanium sea sand mine Carbon Composite Iron Ore Hot Briquette.
6. the blast furnace smelting method of vanadium titano-magnetite according to claim 5, which is characterized in that in the step S1, mill
150 mesh of granularity < of sample treated common schreyerite；200 mesh of granularity < of grind away treated vanadium titanium sea sand mine.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110512074A (en) * | 2019-09-29 | 2019-11-29 | 东北大学 | A kind of method that high mixture ratio New Zealand sea sand raw ore prepares acid pellet |
| CN112609030A (en) * | 2020-12-11 | 2021-04-06 | 四川德胜集团钒钛有限公司 | Blast furnace smelting method of vanadium titano-magnetite |
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| CN110512074A (en) * | 2019-09-29 | 2019-11-29 | 东北大学 | A kind of method that high mixture ratio New Zealand sea sand raw ore prepares acid pellet |
| CN112609030A (en) * | 2020-12-11 | 2021-04-06 | 四川德胜集团钒钛有限公司 | Blast furnace smelting method of vanadium titano-magnetite |
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