CN110317917A - Reduction on Fluidized Bed-electric arc melting-converter sodium processing vanadium titano-magnetite method - Google Patents
Reduction on Fluidized Bed-electric arc melting-converter sodium processing vanadium titano-magnetite method Download PDFInfo
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- CN110317917A CN110317917A CN201910640291.3A CN201910640291A CN110317917A CN 110317917 A CN110317917 A CN 110317917A CN 201910640291 A CN201910640291 A CN 201910640291A CN 110317917 A CN110317917 A CN 110317917A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0033—In fluidised bed furnaces or apparatus containing a dispersion of the material
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/12—Making spongy iron or liquid steel, by direct processes in electric furnaces
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
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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
- C22B34/00—Obtaining refractory metals
- C22B34/10—Obtaining titanium, zirconium or hafnium
- C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
- C22B34/1204—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 preliminary treatment of ores or scrap to eliminate non- titanium constituents, e.g. iron, without attacking the titanium constituent
- C22B34/1213—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 preliminary treatment of ores or scrap to eliminate non- titanium constituents, e.g. iron, without attacking the titanium constituent by wet processes, e.g. using leaching methods or flotation techniques
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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
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/22—Obtaining vanadium
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Abstract
A kind of method of Reduction on Fluidized Bed-electric arc melting-converter sodium processing vanadium titano-magnetite, sequentially includes the following steps: and v-ti magnetite concentrate powder is placed in feed bin, be transported in primary cyclone；Under the action of negative pressure, the solid gas separation of v-ti magnetite concentrate powder, level-one solid material enter suspension heating furnace；High-temperature flue gas is heated level-one solid material and is in suspended state；Enter back into secondary cyclone, it isolates after second level solid material enters reduction reactor, the reducing material of formation enters under conditions of electric arc furnaces electric arc melting, and liquid slag enters converter and carries out sodium oxide baking, ore grinding after roasting clinker cooling, then water logging separate TiO2Concentrate and sodium vanadate solution.Method of the invention can efficiently separate each component, and simple process process is short, have a good application prospect.
Description
Technical field
The invention belongs to metallurgical technology field, in particular to a kind of Reduction on Fluidized Bed-electric arc melting-converter sodium handles vanadium titanium
The method of magnetic iron ore.
Background technique
Vanadium titanium is the important strategic resource of country, is widely used in the cores such as aerospace, seamed high-speed steel rail, defense military height
Technical field, main preservation is in vanadium titano-magnetite.It is current mainly smart using blast furnace-converter industrial flow processing v-ti magnetite
Mine, but limited by blast furnace process condition, titanium therein is not recycled, and the rate of recovery of vanadium also only has 45% or so, is made
At the significant wastage of vanadium and titanium resources.Therefore, anxious for the iron of vanadium titano-magnetite, vanadium, titanium full constituent efficient technique of rainwater utilization and equipment
It needs to research and develop.
Fluidized bed direct-reduction-electric furnace, which melts, point may be implemented efficiently separating for iron and vanadium titanium, and fluidized bed process therein is because straight
It connects and enters that furnace, process flow are short, required temperature is low using fine ore, advantage is prominent in direct-reduction process.Fluidized bed process is a kind of
The method for making mineral grain be in suspended state by ore bed using reducibility gas and being restored, the 1940s petroleum
Modern fluid bed reaction technology has been opened up in catalytic cracking, and is introduced into gas base directly reducing industry.Fluidized bed process is in addition to having also
Original do not have to coke, discharge pollutants outside few advantage or fine ore can directly be entered the direct-reduction technique of furnace by only one.
Compared with ball block, powder granule specific surface area is multiplied, therefore the reaction rate of identical temperature fluidized bed at elevated also improves.Cause
This, based on the molten vanadium titano-magnetite full constituent efficient technique of rainwater utilization for dividing technical research novel of fluidized bed direct-reduction-electric furnace and dress
It is standby significant.
Summary of the invention
The object of the present invention is to provide a kind of method of Reduction on Fluidized Bed-electric arc melting-converter sodium processing vanadium titano-magnetite,
Prereduction (ferrous metal rate >=90%) is carried out to vanadium titano-magnetite using fluidized bed Direct Reduction Technology, then uses electric arc furnaces
Fusing separation is carried out, molten iron is generated and vanadium titanium slag, the water logging vanadium extraction after sodiumizing oxidizing roasting of vanadium titanium slag finally obtains high-grade titanium
Slag, to realize that the full constituent of vanadium titano-magnetite efficiently utilizes.
Method of the invention sequentially includes the following steps:
(1) v-ti magnetite concentrate powder is placed in feed bin, is transported in primary cyclone by the drain hole of feed bin；
(2) gas outlet of primary cyclone is connected to the feed inlet of cleaner, the gas outlet of cleaner with draw
Blower connection, the discharge port of primary cyclone are connected to the lower part of suspension heating furnace, and the top of suspension heating furnace passes through defeated
Send pipeline to be connected to the feed inlet of secondary cyclone, the gas outlet of secondary cyclone and primary cyclone into
Material mouth connection；Air-introduced machine is opened, makes to form negative pressure inside primary cyclone, suspension heating furnace and secondary cyclone,
Under the action of negative pressure, v-ti magnetite concentrate powder carries out solid gas separation, the level-one solid material of formation in primary cyclone
Into suspension heating furnace；
(3) 1100~1300 DEG C of high-temperature flue gas is passed through from the heating furnace bottom that suspends, high-temperature flue gas makes level-one solid material
It is heated and is in suspended state；
(4) the level-one solid material after being heated enters secondary cyclone by conveyance conduit under the action of negative pressure
Secondary solid gas separation is carried out, the second level solid material of formation is discharged from the discharge port of secondary cyclone；
(5) discharge port of secondary cyclone is connected to the feed inlet of reduction reactor；It is passed through to reduction reactor
In the case where reducibility gas, after second level solid material enters reduction reactor, ferriferous oxide therein is reduced into metallic iron,
The reducing material of formation is discharged from the discharge port of reduction reactor, into electric arc furnaces；
(6) under conditions of electric arc furnaces carries out electric arc melting, electric arc melting is added in reducing material in electric arc furnaces, forms liquid
State slag and molten iron, respectively from slag-drip opening and molten iron outlet discharge；
(7) slag-drip opening of electric arc furnaces is connected to by pipeline with converter, and liquid slag enters converter, and sodium carbonate is added into converter
Or sodium sulphate, and it is passed through oxygen, liquid slag carries out sodium oxide baking after mixing with sodium carbonate or sodium sulphate, it is ripe to obtain roasting
Material；Vanadium trioxide in roasting clinker is oxidized to vanadic anhydride, and then reacts generation with sodium carbonate or sodium sulphate and be dissolved in
The sodium vanadate of water；
(8) roasting clinker is discharged from converter, broken and ore grinding is carried out after being cooled to room temperature, obtain roasting powder；Roasting
Burn powder carry out water logging into the water, sodium vanadate is soluble in water, and the water logging material of acquisition is separated by filtration, obtain sodium vanadate solution and
Water logging slag, the titanium dioxide roasted in clinker enter in water logging slag；TiO is made after washing drying in water logging slag2Concentrate.
Partial size≤0.8mm of above-mentioned v-ti magnetite concentrate powder.
In the above method, reduction reactor is case structure, and top is equipped with feed inlet, is equipped with discharge port, bottom above side wall
Portion is equipped with air inlet, and inside is equipped with air distribution plate and at least one partition；Air distribution plate is located at reduction reactor lower part, air distribution plate with also
Space between former reactor bottom plate is as air compartment；Partition is located above air distribution plate, and it is anti-that two sides of partition are fixed on reduction
It answers on the inner wall of device, the space between the top margin of partition and the top of reduction reactor is upper channel, the bottom edge of partition and cloth
Space between aerofoil is lower passage；And inlet port and outlet port are located at the two sides of partition；Each partition will restore anti-
Answering even partition inside device is at least two reduction rooms；Under conditions of being passed through reducibility gas, into the two of reduction reactor
Grade solid material is indoor in suspended state in each reduction, and is reduced.
In the above method, electric arc furnaces includes furnace body and electrode, and electrode is fixed on above furnace body, and electrode is inserted at the top of furnace body
In furnace body；It is equipped with feed inlet above furnace body to be connected to the discharge port of reduction reactor by pipeline, furnace interior divides from top to bottom
For upper space, slag blanket space and molten iron sheaf space, the side wall of upper space is equipped with gas outlet, sets on the side wall in slag blanket space
There is slag-drip opening, the side wall of molten iron sheaf space is exported equipped with molten iron；The bottom end of electrode is located in slag blanket space；Arc melting
When, after reducing material enters electric arc furnaces, the liquid slag and molten iron formed through electric arc melting respectively enters slag blanket space and molten iron layer
Space.
In the above method, v-ti magnetite concentrate powder is after primary cyclone carries out solid gas separation, the level-one tail of generation
Gas enters deduster, and the dedusting tail gas after dedusting is discharged through air-introduced machine.
In the above method, the gas outlet of electric arc furnaces is connected to by high-temperature flue gas pipeline with the bottom of suspension heating furnace, electric arc
The high-temperature flue gas generated when melting is passed through in suspension heating furnace through high-temperature flue gas pipeline.
In the above method, when secondary cyclone carries out the separation of secondary solid gas, the second level tail gas of generation enters level-one rotation
The feed inlet of wind separator.
The Iron grade TFe 55~62% of above-mentioned v-ti magnetite concentrate powder contains FeO 26~34% by mass percentage,
SiO22~10%, Al2O32~10%, CaO 0.1~1.2%, MgO 0.5~11%.
In the above method, into the volume flow of the high-temperature flue gas in suspension heating furnace and the quality stream of level-one solid material
The ratio of amount is 0.15~0.25m3/kg；The temperature of level-one solid material in suspension heating furnace is 800~900 DEG C.
Above-mentioned reducibility gas is that carbon monoxide and/or hydrogen or carbon monoxide and/or hydrogen and nitrogen form
Mixed gas, nitrogen percent by volume≤40% in mixed gas.
In the above method, into the volume flow of the reducibility gas of reduction reactor and the quality stream of second level solid material
The ratio of amount is 0.05~0.15m3/ kg, residence time 40~60min of the second level solid material in reduction reactor, reduction
Temperature of charge in reactor is 750~850 DEG C.
In the above method, deduster, primary cyclone, secondary cyclone and the heating that suspends when opening air-introduced machine
Negative pressure in furnace is -0.1kPa~-2.5kPa.
In the above method, degree of metalization >=90% of iron in reduction reactor.
In the above method, smelting temperature when electric arc furnaces carries out electric arc melting is 1600~1800 DEG C, and reducing material is in electricity
Residence time in arc furnace is 40~60min.
Above-mentioned molten iron contains Fe >=95% by mass percentage.
In the above method, the temperature of sodium oxide baking is 1250~1500 DEG C, and the time is 20~40min；Sodium carbonate or
The dosage of sodium sulphate is the 15~20% of liquid slag gross mass；The total amount and liquid for the oxygen being passed through during sodium oxide baking
The mass ratio of state slag is 75~115m3/kg。
In the above method, granularity≤0.074mm of powder is roasted, the temperature of water logging is 70~100 DEG C, the time is 40~
60min；Water consumption when water logging is 4~6L/kg by the liquid-solid ratio of water and roasting material.
Above-mentioned TiO2Contain TiO in concentrate by mass percentage2>=50%.
The principle of the present invention is: by the suspension preheating of suspension heating furnace, restoring again, makes in v-ti magnetite concentrate
Iron is reduced, and vanadium and titanium still exist in the form of the oxide；When carrying out electric arc melting, iron is separated prior to vanadium titanium, then in converter
Vanadium is recycled in middle sodium roasting, then water logging, realizes the separation of three kinds of iron, vanadium and titanium elements；Method of the invention can efficiently separate
Each component, simple process process is short, has a good application prospect.
Detailed description of the invention
Fig. 1 is the apparatus structure signal that Reduction on Fluidized Bed-electric arc melting of the invention-converter sodium handles vanadium titano-magnetite
Figure；
Fig. 2 is reduction reactor structural schematic diagram in Fig. 1；
In figure, 1, feed bin, 2, primary cyclone, 3, deduster, 4, air-introduced machine, 5, suspension heating furnace, 6, delivery pipe
Road, 7, secondary cyclone, 8, reduction reactor discharge port, 9, reduction reactor, 10, electrode, 11, electric arc furnaces feed inlet,
12, furnace body, 13, slag-drip opening, 14, molten iron outlet, 15, high-temperature flue gas pipeline, 16, converter oxygen jet, 17, converter body, 18,
Converter discharge port, 19, reduction reactor feed inlet, 20, partition, 21, air distribution plate.
Specific embodiment
Granularity≤0.8mm of powdery vanadium titano-magnetite in the embodiment of the present invention, wherein granularity is less than the particle matter of 0.074mm
Amount accounts for the 40~90% of gross mass.
Reduction reactor is divided into N+1 reduction room by N number of partition in reduction reactor of the invention in the width direction.
In the embodiment of the present invention TFe of powdery v-ti magnetite concentrate be 55~62%, by mass percentage containing FeO 26~
34%, SiO22~10%, Al2O32~10%, CaO 0.1~1.2%, MgO 0.5~11%.
Reduction on Fluidized Bed-electric arc melting-converter sodium processing vanadium titano-magnetite apparatus structure in the embodiment of the present invention is such as
Shown in Fig. 1, including feed bin 1, primary cyclone 2, deduster 3, air-introduced machine 4, suspension heating furnace 5, suspended material channel 6,
Secondary cyclone 7, reduction reactor 9 and electric arc furnaces；The drain hole of feed bin 1 and the feed inlet of primary cyclone 2 connect
Logical, the discharge port of primary cyclone 2 is connected to the lower part of suspension heating furnace 5, and the top of suspension heating furnace 5 passes through delivery pipe
Road 6 is connected to the feed inlet of secondary cyclone 7, the gas outlet of secondary cyclone 7 and primary cyclone 2 into
Material mouth connection；The discharge port of secondary cyclone 7 is connected to the reduction reactor feed inlet 19 of reduction reactor 9；
9 structure of reduction reactor is as shown in Fig. 2, case structure, top are equipped with reduction reactor feed inlet 19, side wall top
Equipped with reduction reactor discharge port 8, bottom is equipped with air inlet, and inside is equipped with air distribution plate 21 and two partitions 20；Air distribution plate 21
In 9 lower part of reduction reactor, the space between 9 bottom plate of air distribution plate 21 and reduction reactor is as air compartment；Partition 20 is located at cloth wind
21 top of plate, two sides of partition 20 are fixed on the inner wall of reduction reactor 9, the top margin and reduction reactor 9 of partition 20
Top between space be upper channel, space between the bottom edge and air distribution plate 21 of partition 20 is lower passage；And also
Former reactor feed mouth 19 and reduction reactor discharge port 8 are located at the two sides of all partitions 20；Two partitions 20 will restore
Equipartition is three reduction rooms in the horizontal direction inside reactor 9；
Electric arc furnaces includes furnace body 12 and electrode 10, and electrode 10 is fixed on 12 top of furnace body, and electrode 10 is inserted at the top of furnace body 12
Enter in furnace body 12；It is equipped with electric arc furnaces feed inlet 11 above furnace body 12 to be connected to reduction reactor discharge port 8 by pipeline, furnace body 12
Inside is divided into upper space, slag blanket space and molten iron sheaf space from top to bottom, and the side wall of upper space is equipped with gas outlet, slag blanket
The side wall in space is equipped with slag-drip opening 13, and the side wall of molten iron sheaf space is equipped with molten iron outlet 14；The bottom end of electrode 10 is located at slag
In sheaf space；Gas outlet is connected to by high-temperature flue gas pipeline 15 with the bottom of suspension heating furnace 5；
Converter includes converter body 17 and converter oxygen jet 16, and side wall is equipped with converter discharge port 18.
In the embodiment of the present invention in reduction reactor second level solid material degree of metalization >=90%.
The following are the preferred embodiment of the present invention.
Embodiment 1
V-ti magnetite concentrate powder contains TFe 58.95%, FeO 31.12%, SiO by mass percentage22.04%, Al2O3
3.49%, CaO 0.21%, MgO 0.66%；
V-ti magnetite concentrate powder is placed in feed bin, is transported in primary cyclone by the drain hole of feed bin；Vanadium
Partial size≤0.8mm of titanium magnet ore concentrate powder；
The gas outlet of primary cyclone is connected to the feed inlet of cleaner, the gas outlet of cleaner and air-introduced machine
Connection, the discharge port of primary cyclone are connected to the lower part of suspension heating furnace, pass through delivery pipe at the top of suspension heating furnace
Road is connected to the feed inlet of secondary cyclone, the gas outlet of secondary cyclone and the feed inlet of primary cyclone
Connection；Air-introduced machine is opened, makes to form negative pressure inside primary cyclone, suspension heating furnace and secondary cyclone, negative
Under pressure effect, v-ti magnetite concentrate powder carries out solid gas separation in primary cyclone, and the level-one solid material of formation enters
Suspension heating furnace；
1100~1300 DEG C of high-temperature flue gas is passed through from the heating furnace bottom that suspends, high-temperature flue gas adds level-one solid material
Heat is simultaneously in suspended state；
Level-one solid material after being heated under the action of negative pressure, enters secondary cyclone by conveyance conduit and carries out
Secondary solid gas separation, the second level solid material of formation are discharged from the discharge port of secondary cyclone；
The discharge port of secondary cyclone is connected to the feed inlet of reduction reactor；Reduction is being passed through to reduction reactor
Property gas in the case where, after second level solid material enters reduction reactor, ferriferous oxide therein is reduced into metallic iron, formed
Reducing material from the discharge port of reduction reactor be discharged, into electric arc furnaces；
Under conditions of electric arc furnaces carries out electric arc melting, electric arc melting is added in reducing material in electric arc furnaces, molten through electric arc
It refines the liquid slag formed and molten iron respectively enters slag blanket space and molten iron sheaf space, respectively from slag-drip opening and molten iron outlet discharge；
The high-temperature flue gas generated when electric arc melting is passed through in suspension heating furnace through high-temperature flue gas pipeline；
The slag-drip opening of electric arc furnaces is connected to by pipeline with converter, and liquid slag enters converter, and sodium carbonate is added into converter, and
It is passed through oxygen, liquid slag carries out sodium oxide baking after mixing with sodium carbonate, obtain roasting clinker；Roast three oxidations in clinker
Two vanadium are oxidized to vanadic anhydride, and then the sodium vanadate for generating and being dissolved in water is reacted with sodium carbonate or sodium sulphate；
Roasting clinker is discharged from converter, broken and ore grinding is carried out after being cooled to room temperature, obtains roasting powder；Roast powder
Material carries out water logging into the water, and sodium vanadate is soluble in water, and the water logging material of acquisition is separated by filtration, and obtains sodium vanadate solution and water logging
Slag, the titanium dioxide roasted in clinker enter in water logging slag；TiO is made after washing drying in water logging slag2Concentrate；
For v-ti magnetite concentrate powder after primary cyclone carries out solid gas separation, the level-one tail gas of generation enters dedusting
Device, the dedusting tail gas after dedusting are discharged through air-introduced machine；
Secondary cyclone carry out secondary solid gas separation when, the second level tail gas of generation enter primary cyclone into
Material mouth；
Wherein, into the ratio of the volume flow of the high-temperature flue gas in suspension heating furnace and the mass flow of level-one solid material
For 0.15m3/kg；The temperature of level-one solid material in suspension heating furnace is 800 DEG C；
Reducibility gas is the mixed gas of carbon monoxide and nitrogen, nitrogen percent by volume 25%；
Ratio into the mass flow of the volume flow and second level solid material of the reducibility gas of reduction reactor is
0.1m3/ kg, residence time 50min of the second level solid material in reduction reactor, the temperature of charge in reduction reactor are
780℃；
Negative pressure when opening air-introduced machine in deduster, primary cyclone, secondary cyclone and suspension heating furnace
Respectively -2.2, -1.1, -0.36 and -0.13kPa；
Degree of metalization >=90% of iron in reduction reactor；
Smelting temperature when electric arc furnaces carries out electric arc melting is 1600 DEG C, and residence time of the reducing material in electric arc furnaces be
60min；
Molten iron contains Fe 96%, C 1.50%, P 0.01%, S 0.01%, Si 0.02%, Al by mass percentage
0.03%；
The temperature of sodium oxide baking is 1300 DEG C, time 40min；The dosage of sodium carbonate is liquid slag gross mass
17%；The total amount for the oxygen being passed through during sodium oxide baking and the mass ratio of liquid slag are 80m3/kg；
Granularity≤0.074mm of powder is roasted, the temperature of water logging is 70 DEG C, time 60min；Water consumption when water logging is pressed
The liquid-solid ratio of water and roasting material is 6L/kg；
TiO2Contain TiO in concentrate by mass percentage254.5%.
Embodiment 2
V-ti magnetite concentrate powder contains TFe 59.63%, FeO 30.93%, SiO by mass percentage21.78%, Al2O3
3.14%, CaO 0.20%, MgO 0.76%；
With embodiment 1, difference is method:
(1) volume flow of high-temperature flue gas entered in suspension heating furnace is with the ratio of the mass flow of level-one solid material
0.25m3/kg；The temperature of level-one solid material in suspension heating furnace is 900 DEG C；
(2) reducibility gas is the mixed gas of hydrogen and nitrogen, nitrogen percent by volume 35%；
(3) into the ratio of the mass flow of the volume flow and second level solid material of the reducibility gas of reduction reactor
For 0.15m3/ kg, residence time 40min of the second level solid material in reduction reactor, the temperature of charge in reduction reactor
It is 810 DEG C；
(4) negative in deduster, primary cyclone, secondary cyclone and suspension heating furnace when opening air-introduced machine
Pressure is respectively -1.95, -1.15, -0.33 and -0.17kPa；
(5) 1700 DEG C of electric arc melting temperature, residence time 50min of the reducing material in electric arc furnaces；
(6) molten iron contains Fe 95.2%, C 1.41%, P 0.02%, S 0.02%, Si 0.04% by mass percentage,
Al 0.04%；
(7) sodium sulphate is added into converter；The temperature of sodium oxide baking is 1350 DEG C, time 30min；Sodium sulphate
Dosage is the 16% of liquid slag gross mass；The total amount for the oxygen being passed through during sodium oxide baking and the mass ratio of liquid slag
For 85m3/kg；
(8) temperature of water logging is 80 DEG C, time 55min；The liquid-solid ratio of water and roasting material is 4L/kg；
(9)TiO2Contain TiO in concentrate by mass percentage252.3%.
Embodiment 3
V-ti magnetite concentrate powder contains TFe 60.58%, FeO 31.24%, SiO by mass percentage21.08%, Al2O3
3.02%, CaO 0.14%, MgO 0.68%；
With embodiment 1, difference is method:
(1) volume flow of high-temperature flue gas entered in suspension heating furnace is with the ratio of the mass flow of level-one solid material
0.2m3/kg；The temperature of level-one solid material in suspension heating furnace is 850 DEG C；
(2) mixed gas of reducibility gas carbon monoxide, hydrogen and nitrogen, nitrogen percent by volume 15%；One oxidation
Carbon percent by volume 60%；
(3) into the ratio of the mass flow of the volume flow and second level solid material of the reducibility gas of reduction reactor
For 0.06m3/ kg, residence time 45min of the second level solid material in reduction reactor, the temperature of charge in reduction reactor
It is 850 DEG C；
(4) negative in deduster, primary cyclone, secondary cyclone and suspension heating furnace when opening air-introduced machine
Pressure is respectively -2.35, -1.25, -0.34 and -0.16kPa；
(5) 1750 DEG C of electric arc melting temperature, residence time of the reducing material in electric arc furnaces are 45min；
(6) molten steel quality percentage contains Fe 96.8%, C 1.04%, P 0.01%, S 0.01%, Si 0.03%, Al
0.02%；
(7) temperature of sodium oxide baking is 1400 DEG C, time 25min；The dosage of sodium carbonate is liquid slag gross mass
15%；The total amount for the oxygen being passed through during sodium oxide baking and the mass ratio of liquid slag are 75m3/kg；
(8) temperature of water logging is 85 DEG C, time 50min；The liquid-solid ratio of water and roasting material is 5L/kg；
(9)TiO2Contain TiO in concentrate by mass percentage251.6%.
Embodiment 4
V-ti magnetite concentrate powder contains TFe 57.44%, FeO 29.25%, SiO by mass percentage23.11%, Al2O3
4.16%, CaO 0.27%, MgO 7.83%；
With embodiment 1, difference is method:
(1) volume flow of high-temperature flue gas entered in suspension heating furnace is with the ratio of the mass flow of level-one solid material
0.22m3/kg；The temperature of level-one solid material in suspension heating furnace is 870 DEG C；
(2) reducibility gas is isometric gaseous mixture of carbon monoxide and hydrogen；
(3) into the ratio of the mass flow of the volume flow and second level solid material of the reducibility gas of reduction reactor
For 0.05m3/ kg, residence time 60min of the second level solid material in reduction reactor, the temperature of charge in reduction reactor
It is 750 DEG C；
(4) negative in deduster, primary cyclone, secondary cyclone and suspension heating furnace when opening air-introduced machine
Pressure is respectively -2.35, -1.25, -0.34 and -0.16kPa；
(5) 1800 DEG C of electric arc melting temperature, residence time of the reducing material in electric arc furnaces are 40min；
(6) molten steel quality percentage contains Fe 95.4%, C 1.1%, P 0.02%, S 0.01%, Si 0.04%, Al
0.03%；
(7) sodium sulphate is added into converter；The temperature of sodium oxide baking is 1450 DEG C, time 20min；Sodium sulphate
Dosage is the 18% of liquid slag gross mass；The total amount for the oxygen being passed through during sodium oxide baking and the mass ratio of liquid slag
For 95m3/kg；
(8) temperature of water logging is 90 DEG C, time 40min；The liquid-solid ratio of water and roasting material is 4.5L/kg；
(9)TiO2Contain TiO in concentrate by mass percentage253.1%.
Claims (10)
1. a kind of Reduction on Fluidized Bed-electric arc melting-converter sodium processing vanadium titano-magnetite method, it is characterised in that according to the following steps
It carries out:
(1) v-ti magnetite concentrate powder is placed in feed bin, is transported in primary cyclone by the drain hole of feed bin；
(2) gas outlet of primary cyclone is connected to the feed inlet of cleaner, the gas outlet of cleaner and air-introduced machine
Connection, the discharge port of primary cyclone are connected to the lower part of suspension heating furnace, pass through delivery pipe at the top of suspension heating furnace
Road is connected to the feed inlet of secondary cyclone, the gas outlet of secondary cyclone and the feed inlet of primary cyclone
Connection；Air-introduced machine is opened, makes to form negative pressure inside primary cyclone, suspension heating furnace and secondary cyclone, negative
Under pressure effect, v-ti magnetite concentrate powder carries out solid gas separation in primary cyclone, and the level-one solid material of formation enters
Suspension heating furnace；
(3) 1100~1300 DEG C of high-temperature flue gas is passed through from the heating furnace bottom that suspends, high-temperature flue gas adds level-one solid material
Heat is simultaneously in suspended state；
(4) the level-one solid material after being heated under the action of negative pressure, enters secondary cyclone by conveyance conduit and carries out
Secondary solid gas separation, the second level solid material of formation are discharged from the discharge port of secondary cyclone；
(5) discharge port of secondary cyclone is connected to the feed inlet of reduction reactor；Reduction is being passed through to reduction reactor
Property gas in the case where, after second level solid material enters reduction reactor, ferriferous oxide therein is reduced into metallic iron, formed
Reducing material from the discharge port of reduction reactor be discharged, into electric arc furnaces；
(6) under conditions of electric arc furnaces carries out electric arc melting, electric arc melting is added in reducing material in electric arc furnaces, forms liquid slag
And molten iron, respectively from slag-drip opening and molten iron outlet discharge；
(7) slag-drip opening of electric arc furnaces is connected to by pipeline with converter, and liquid slag enters converter, and sodium carbonate or sulphur are added into converter
Sour sodium, and it is passed through oxygen, liquid slag carries out sodium oxide baking after mixing with sodium carbonate or sodium sulphate, obtain roasting clinker；Roasting
Vanadium trioxide in overburnt material is oxidized to vanadic anhydride, and then the vanadium for generating and being dissolved in water is reacted with sodium carbonate or sodium sulphate
Sour sodium；
(8) roasting clinker is discharged from converter, broken and ore grinding is carried out after being cooled to room temperature, obtain roasting powder；Roast powder
Material carries out water logging into the water, and sodium vanadate is soluble in water, and the water logging material of acquisition is separated by filtration, and obtains sodium vanadate solution and water logging
Slag, the titanium dioxide roasted in clinker enter in water logging slag；TiO is made after washing drying in water logging slag2Concentrate.
2. a kind of Reduction on Fluidized Bed-electric arc melting according to claim 1-converter sodium processing vanadium titano-magnetite method,
It is characterized in that partial size≤0.8mm of the v-ti magnetite concentrate powder.
3. a kind of Reduction on Fluidized Bed-electric arc melting according to claim 1-converter sodium processing vanadium titano-magnetite method,
It is characterized in that the reduction reactor is case structure, top is equipped with feed inlet, is equipped with discharge port above side wall, bottom is set
There is air inlet, inside is equipped with air distribution plate and at least one partition；Air distribution plate is located at reduction reactor lower part, and air distribution plate and reduction are anti-
Answer the space between device bottom plate as air compartment；Partition is located above air distribution plate, and two sides of partition are fixed on reduction reactor
Inner wall on, space between the top margin of partition and the top of reduction reactor is upper channel, the bottom edge of partition and air distribution plate
Between space be lower passage；And inlet port and outlet port are located at the two sides of partition；Each partition is by reduction reactor
Internal even partition is at least two reduction rooms；Under conditions of being passed through reducibility gas, the second level into reduction reactor is solid
State material is indoor in suspended state in each reduction, and is reduced.
4. a kind of Reduction on Fluidized Bed-electric arc melting according to claim 1-converter sodium processing vanadium titano-magnetite method,
It is characterized in that the electric arc furnaces includes furnace body and electrode, electrode is fixed on above furnace body, and electrode is inserted into furnace at the top of furnace body
In vivo；It is equipped with feed inlet above furnace body to be connected to the discharge port of reduction reactor by pipeline, furnace interior is divided into from top to bottom
The side wall of upper space, slag blanket space and molten iron sheaf space, upper space is equipped with gas outlet, and the side wall in slag blanket space is equipped with
The side wall of slag-drip opening, molten iron sheaf space is exported equipped with molten iron；The bottom end of electrode is located in slag blanket space；When arc melting,
After reducing material enters electric arc furnaces, the liquid slag and molten iron formed through electric arc melting respectively enters slag blanket space and molten iron layer is empty
Between.
5. a kind of Reduction on Fluidized Bed-electric arc melting according to claim 1-converter sodium processing vanadium titano-magnetite method,
It is characterized in that v-ti magnetite concentrate powder is after primary cyclone carries out solid gas separation, the level-one tail of generation in step (2)
Gas enters deduster, and the dedusting tail gas after dedusting is discharged through air-introduced machine.
6. a kind of Reduction on Fluidized Bed-electric arc melting according to claim 1-converter sodium processing vanadium titano-magnetite method,
It is characterized in that the gas outlet of the electric arc furnaces is connected to by high-temperature flue gas pipeline with the bottom of suspension heating furnace, electric arc melting
When the high-temperature flue gas that generates be passed through in suspension heating furnace through high-temperature flue gas pipeline.
7. a kind of Reduction on Fluidized Bed-electric arc melting according to claim 1-converter sodium processing vanadium titano-magnetite method,
It is characterized in that when secondary cyclone carries out the separation of secondary solid gas, the second level tail gas of generation enters level-one rotation in step (4)
The feed inlet of wind separator.
8. a kind of Reduction on Fluidized Bed-electric arc melting according to claim 1-converter sodium processing vanadium titano-magnetite method,
It is characterized in that the Iron grade TFe 55~62% of the v-ti magnetite concentrate powder, by mass percentage containing FeO 26~
34%, SiO22~10%, Al2O32~10%, CaO 0.1~1.2%, MgO 0.5~11%.
9. a kind of Reduction on Fluidized Bed-electric arc melting according to claim 1-converter sodium processing vanadium titano-magnetite method,
It is characterized in that the reducibility gas is carbon monoxide and/or hydrogen or carbon monoxide and/or hydrogen and nitrogen group
At mixed gas, nitrogen percent by volume≤40% in mixed gas.
10. a kind of Reduction on Fluidized Bed-electric arc melting according to claim 1-converter sodium processing vanadium titano-magnetite method,
It is characterized in that the molten iron contains Fe >=95% by mass percentage.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114045404A (en) * | 2021-11-16 | 2022-02-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Titanium concentrate hydrogen reduction method |
| CN114574712A (en) * | 2022-03-14 | 2022-06-03 | 沈阳铝镁设计研究院有限公司 | Roasting system and roasting process for reducing roasting temperature by adopting fluidized bed |
| WO2023066794A1 (en) * | 2021-10-19 | 2023-04-27 | Paul Wurth S.A. | Method for reducing carbon footprint in operating a metallurgical plant for producing pig iron |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| LU500764B1 (en) * | 2021-10-19 | 2023-04-20 | Wurth Paul Sa | Method for reducing carbon footprint in operating a metallurgical plant for producing pig iron |
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| CN101113488A (en) * | 2007-09-10 | 2008-01-30 | 攀枝花锐龙冶化材料开发有限公司 | Method for comprehensive utilization of V-Ti-bearing iron ore concentrate by using tunnel kiln reduction-grinding - separation |
| CN102127611A (en) * | 2011-01-25 | 2011-07-20 | 吴道洪 | Method for reducing vanadium-titanium magnetite powder by coal reducing gas and fluidized beds |
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| CN101113488A (en) * | 2007-09-10 | 2008-01-30 | 攀枝花锐龙冶化材料开发有限公司 | Method for comprehensive utilization of V-Ti-bearing iron ore concentrate by using tunnel kiln reduction-grinding - separation |
| CN102127611A (en) * | 2011-01-25 | 2011-07-20 | 吴道洪 | Method for reducing vanadium-titanium magnetite powder by coal reducing gas and fluidized beds |
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| WO2023066794A1 (en) * | 2021-10-19 | 2023-04-27 | Paul Wurth S.A. | Method for reducing carbon footprint in operating a metallurgical plant for producing pig iron |
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| CN114574712A (en) * | 2022-03-14 | 2022-06-03 | 沈阳铝镁设计研究院有限公司 | Roasting system and roasting process for reducing roasting temperature by adopting fluidized bed |
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