CN209260138U - Ladle and ferroalloy vacuum refining system for the refining of ferroalloy circulating vacuum - Google Patents
Ladle and ferroalloy vacuum refining system for the refining of ferroalloy circulating vacuum Download PDFInfo
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- CN209260138U CN209260138U CN201822164481.6U CN201822164481U CN209260138U CN 209260138 U CN209260138 U CN 209260138U CN 201822164481 U CN201822164481 U CN 201822164481U CN 209260138 U CN209260138 U CN 209260138U
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Abstract
The utility model provides a kind of ladle and ferroalloy vacuum refining system for the refining of ferroalloy circulating vacuum, and the ladle for the refining of ferroalloy circulating vacuum includes backpack body and vacuum chamber；Backpack body is the backpack body for containing ferrosilicon molten iron and liquid Mn-rich slag, and vacuum chamber is the open tubular construction in lower end；Vacuum chamber is located above backpack body；The vacuum chamber includes vacuum chamber top and dip pipe, and the bottom end of the dip pipe is slope structure, and the lower end of the dip pipe is inserted into ferrosilicon molten iron, and its lower end is formed by slag gold liquid level between ferrosilicon molten iron and liquid Mn-rich slag；The bottom surface of backpack body is provided with the first air brick, which is located at dipping tube hub, and it is connected by bottom blowing pipeline with bottom blowing valving station；The entrance that the outer wall top on vacuum chamber top opens up is connected with N grades of oil-sealed rotary pumps.The utility model additionally provides a kind of ferroalloy vacuum refining system comprising the ladle for the refining of ferroalloy circulating vacuum.
Description
Technical field
The utility model relates to it is a kind of for ferroalloy circulating vacuum refining ladle and ferroalloy vacuum refining system,
Belong to metallurgical technology field.
Background technique
Increase with iron and steel enterprise to fine work ferroalloy demand, shaking ladle refining technique have been got in the application of the ferroalloy industry
Come more extensive.It can achieve the dilution etc. of preferable manganese-silicon refining and medium-low carbon ferromanganese clinker using shaking ladle.
Common process flow has manganese-silicon mineral hot furnace, electric refining furnaces and the linkage operation of three furnace of shaking ladle.Wherein, refining electricity
Furnace is intermittent operation, and manganese-silicon mineral hot furnace is continuous operation, and electric refining furnaces and manganese-silicon mineral hot furnace are come out of the stove simultaneously, refining electricity
The medium-low carbon ferromanganese slag of furnace output pours into shaking ladle (containing manganese 20% or so), and the molten iron of output is as final products, i.e., middle low-carbon
Manganese iron.The manganese-silicon melt that manganese-silicon mineral hot furnace is produced is blended into shaking ladle by weighing.Shaking ladle is rotated with certain revolving speed, good
Under good dynamic conditions, the Si in manganese-silicon rapidly reduces the MnO in medium-low carbon ferromanganese slag, takes off to reach and increase manganese
The purpose of silicon, to the MnO dilution in slag to centainly backward motion shaking ladle being required to pour out waste residue.And slough the intermediate alloy after the silicon of part
Melt is blended into electric refining furnaces again and further refines.Electric refining furnaces reload total dosage half after the completion of tapping
High-grade manganese ore and lime melted, wait convert after the intermediate alloy for shaking preliminary refining, then by the manganese of remaining half
Mine and lime are added in furnace, and further desiliconization rises manganese refining, come out of the stove after analysis to be sampled is qualified, to complete a cycle work
Industry.
Medium-low carbon ferromanganese is produced, principle is mainly to utilize the silicon in ferrosilicon with the manganese oxide in liquid manganese slag in shaking ladle
Redox reaction occurs and produces Mn and SiO2, this reaction is violent exothermic reaction, and shaking ladle process production can make full use of useless
The heat and silicon of slag react the heat released with MnO in slag.
2 (MnO)+[Si]=2 [Mn]+(SiO2)。
The effect of shaking ladle is that slag and molten iron are put into shaking ladle to shake, and improves dynamic conditions, mixes slag iron, is increased
Big reaction interface accelerates diffusion process, shortens the reaction time.Under the induced effect of eccentric shaft, shaking ladle does horizontal eccentric center translation.
Due to the effect of shaking ladle wall and the inertia of liquid melts, swing and rotation relative to backpack body, hair occur for liquid alloy and slag
Raw volume iron emulsion, effectively expands slag gold contact area, accelerates mass transport process, promote the completion of chemical reaction.
The principal element for influencing the movement of shaking ladle inner boundary has: revolving speed, eccentricity, liquid level, upper and lower liquid ratio and shaking ladle
Diameter etc., wherein revolving speed is most important influence factor, followed by eccentricity.
Shaking ladle equipment is mainly by shaking ladle (containing liner), reel cage, eccentric agitating device, transmission device, tipple, lube system
The composition such as system and control system.
The prior art one relevant to the utility model
The technical solution of the prior art one:
" shaking ladle-electric furnace process " is the main method for producing medium-low carbon ferromanganese.The technique of typical production low-carbon ferromanganese is first
The liquid silicon manganese alloy that manganese-silicon mineral hot furnace is produced, is deposited in ladle, the Mn-rich slag that electric refining furnaces are produced, storage
Progress silicomanganese conjunction in shaking ladle is added in liquid silicon manganese alloy and Mn-rich slag slowly together in cinder ladle, then using ladle carne
Golden desilication reaction, the sum of volume of the two are usually no more than the 1/2 of shaking ladle dischargeable capacity.Start shaking ladle mechanism, in eccentric shaft
It acts on lower shaking ladle and carries out horizontal hunting, shake 10-15 minutes.It is fascinated shaking ladle using overhead traveling crane, pours out the alloy for shaking and having refined in molten iron
In packet, clinker is poured into cinder ladle.Alloy is blended into electric refining furnaces and is refined, and clinker carries out Water Quenching.Refining in electric refining furnaces
After completion, molten iron is come out of the stove, and is cast.
It is slag gold liquid-liquid two phase reaction in shaking ladle reactor, the slag and metal reaction rate under high temperature are alternate much larger than two
Mass transfer rate, so mass transfer step is controlling unit.Golden two liquid of slag can largely be promoted using the shaking ladle being eccentrically rotated
The mixing of phase, increases the contact area of slag gold two-phase, to accelerate the progress of the golden two alternate reactions of slag.
The shortcomings that prior art one:
1, shaking ladle refining process dust removal design is difficult, and dust removing effects are bad.
2, coefficient of admission is lower when shaking ladle refining, and entire cylinder-packing is but needed to replace when replacing resistance to material, and resistance to material unit consumption increases
Add.
3, shaking ladle refining is more demanding to the mechanical equipment of shaking ladle device, and control refining is main or depends on experience, Bu Nengzhun
The extent of reaction of true control shaking ladle.
4, shaking ladle refining process containment wall and clinker and molten iron relative motion, wash away side wall repeatedly, and hot metal temperature drop is larger.
But the determination of domestic shaking ladle technological parameter passes through the diameter of empirically determined shaking ladle, bias mainly by field experience
Away from parameters such as, revolving speeds.For example, what jinzhou Ferroalloy Plant, China took is that " audition judges slag gold motion state " determines the mixed of slag gold
Close situation.Producer be by fire door flue gas come judge reaction carry out the case where.
Shaking ladle is under the drive of eccentric shaft, and shaking ladle does horizontal eccentric center translation, the opposite fortune of backpack body, clinker and molten iron
It is dynamic, to promote the generation of reaction.Containment wall is ceaselessly washed away by molten iron and clinker, and the acid slag of early stage invades containment wall
Erosion is the main reason for resistance to material of shaking ladle corrodes.The eccentricity of the eccentric shaft of shaking ladle is adjustable, but is still backpack body and inside
The relative motion of high-temperature fusant.Due to the fierceness that is swift in response of silicon in shaking ladle and oxygen, the slag of middle early formation washes away ten to furnace lining
Divide seriously, shaking ladle furnace service life is very low, generally in 200-300 furnace or so.Since ceaselessly with containment wall phase occurs for molten iron and clinker
It to movement, causes hot metal temperature drop very big, influences the progress of refining in next step sometimes.
The shaking ladle capacity that ferroalloy enterprise in China's uses at present is small, and most dischargeable capacitys are 5-8m3, production efficiency
It is low.Refractory material working environment is severe in small-sized shaking ladle, and service life is low, causes situations such as operating rate is low, and increased production cost.
While the effect in order to guarantee shaking ladle, the coefficient of admission of general shaking ladle are no more than 0.5.
In shaking ladle smelting process, generally all without good dust suppression.Shaking ladle needs to be replaced frequently furnace lining, integrally hangs
Dress, therefore dust excluding hood design comparison is difficult, it is relatively difficult because implementing although there is the patent of part to put forth an idea, more
Producer is again without good measurements for reduction.Shaking ladle is when carrying out iron making and converting slag, after shaking ladle refining process and refining completion
Tapping is to iron packet, tapping to cinder ladle, has a large amount of flue dust to generate.
In order to meet the reaction compartment in shaking ladle, general coefficient of admission is 0.6 hereinafter, typically not greater than 0.5, i.e. 15m3
The shaking ladle of (molten iron+clinker total volume), the inner space after masonry is generally in 30m3Left and right.And it is needed when replacing cylinder-packing whole
Body replacement, the resistance to material unit consumption for causing ferroalloy shaking ladle refining are very big.
The prior art two relevant to the utility model
The technical solution of the prior art two:
Single mouth vacuum refining furnace passes through development in more than 30 years, and theory and practice shows: the type of furnace have refining efficiency it is high,
The advantages that structure is simple, refractory wear is few, argon gas utilization rate is high, while the ladle of suitable low capacity is smelted, but it is main
It is used for the vacuum refining of liquid steel of iron and steel enterprise.
The shortcomings that prior art two:
Existing list mouth vacuum refining furnace is mainly used for the vacuum refining of liquid steel of iron and steel enterprise, and it is raw to be not yet applied to ferroalloy
Produce the molten iron refining of enterprise.
Therefore it provides a kind of novel ladle and ferroalloy vacuum refining system for the refining of ferroalloy circulating vacuum
The technical issues of having become this field urgent need to resolve.
Utility model content
In order to solve the above shortcomings and deficiencies, one of the utility model is designed to provide one kind and follows for ferroalloy
The ladle of ring vacuum refining.
Another of the utility model is designed to provide a kind of ferroalloy vacuum refining system, is used for iron it includes described
The ladle of alloy circulating vacuum refining.The utility model mainly solves the cigarette in shaking ladle refining technology used in current this field
Dirt control problem, while by control vacuum degree and the flow of bottom blowing stirring gas, so that control molten iron circulates speed
Degree accelerates the reaction speed of liquid Mn-rich slag and ferrosilicon molten iron；In addition, the utility model can expire the comparison that molten iron fills, from
And the synthesis refractory consumption smelted is saved, it can also realize the ladle refining of large capacity.
In order to achieve the above object, on the one hand, the utility model provides a kind of molten iron for the refining of ferroalloy circulating vacuum
Packet, wherein the ladle for the refining of ferroalloy circulating vacuum includes backpack body and vacuum chamber；The backpack body is for containing
The backpack body of ferrosilicon molten iron and liquid Mn-rich slag, the vacuum chamber are the open tubular construction in lower end；The vacuum chamber is located at backpack body
Top；
The vacuum chamber includes vacuum chamber top and dip pipe, and the bottom end of the dip pipe is slope structure, the dip pipe
Lower end is inserted into ferrosilicon molten iron, and its lower end is formed by slag gold liquid between ferrosilicon molten iron and liquid Mn-rich slag
Face；
The bottom surface of the backpack body is provided with the first air brick, which is located at dipping tube hub, and its
It is connected by bottom blowing pipeline with bottom blowing valving station；
The entrance that the outer wall top on the vacuum chamber top opens up is connected with N grades of oil-sealed rotary pumps.
According to the utility model specific embodiment, in the ladle for the refining of ferroalloy circulating vacuum,
The distance between the dip pipe bottom end and slag gold liquid level are 50-200mm.
Wherein, it is inserted into ferrosilicon molten iron after the dip pipe vacuumizes, the distance between bottom end and slag gold liquid level are 50-
200mm；But in specific embodiment of the present invention, which can be adjusted according to the state of reaction, such as pomace
Gold reaction is too violent, then can suitably increase the distance.
According to the utility model specific embodiment, in the ladle, if the bottom surface of the backpack body is additionally provided with
Dry air brick, is set to except dip pipe.
According to the utility model specific embodiment, in the ladle for the refining of ferroalloy circulating vacuum,
The number of the air brick is 2-4 block.
Wherein, several air bricks that (periphery) is arranged except dip pipe can promote entirely to wrap intracorporal reaction, reduce dead
Area.
On the other hand, the utility model additionally provides a kind of ferroalloy vacuum refining system, wherein the ferroalloy vacuum
Rectification systems include the ladle for the refining of ferroalloy circulating vacuum, electric refining furnaces, manganese-silicon mineral hot furnace, molten iron
Hired car and jacking apparatus；
The electric refining furnaces are for producing liquid Mn-rich slag and receiving the ladle for the refining of ferroalloy circulating vacuum
Gained molten iron and the electric furnace that the molten iron is refined after circulating vacuum refining；
The manganese-silicon mineral hot furnace is the manganese-silicon mineral hot furnace for producing ferrosilicon molten iron；
The ladle for the refining of ferroalloy circulating vacuum be to contain ferrosilicon molten iron and liquid Mn-rich slag, and in
The ladle of circulating vacuum refining is carried out in the ladle；
The ladle car is used to transport the ladle for the refining of ferroalloy circulating vacuum；
Jacking apparatus used is used for the ladle liter that ferroalloy circulating vacuum refines for placing the ladle car, and by this
To target processing height.
According to the utility model specific embodiment, in the system, refining equipment (i.e. the utility model institute
This provided is used for the ladle of ferroalloy circulating vacuum refining) it is the single-mouth refining furnace with larger stirring capacity.
Ferroalloy vacuum refining system described in the utility model can be adapted for a variety of different methods and carry out ferroalloy
Vacuum refining, in order to further be illustrated to the system of the utility model, the utility model additionally provides practical new using this
The method that the system of type carries out vacuum refining to ferroalloy, the described method comprises the following steps:
(1) the liquid Mn-rich slag loading for ferrosilicon molten iron and the electric refining furnaces production that manganese-silicon mineral hot furnace produces is used for iron
In the ladle of alloy circulating vacuum refining；The ladle is placed in and is vacuum-treated position, connects the bottom being connected with the first air brick
Blowpipe road is to carry out small tolerance bottom blowing stirring；
(2) start the N grades of pumps of N grades of oil-sealed rotary pumps to complete pre- when the pressure in control dip pipe reaches goal pressure
It vacuumizes, is ready for being vacuum-treated；
(3) by ladle be raised to target processing height after, by successively start N grade oil-sealed rotary pumps except N grades pump in addition to
Other grades pump, reduce the indoor pressure of the vacuum constantly, to carry out vacuum pumping, pressure reduction while constantly increases
The tolerance of big bottom blown gas, so that ferrosilicon molten iron starts the cycle over after flowing into vacuum chamber, then declines and pours in liquid Mn-rich slag,
It realizes the mixing of ferrosilicon molten iron and liquid Mn-rich slag and completes desiliconization reduction manganese reaction；
(4) after vacuum refining circulation is completed, using nitrogen vacuum breaker, after ferrosilicon molten iron level reduces, by the iron
Water packet handles height by target and is down in horizontal rail；
(5) ladle skim after operation, then the molten iron after gained is refined is added electric refining furnaces and refines
Operation.
According to the utility model specific embodiment, in the described method, the liquid Mn-rich slag and ferrosilicon molten iron
Volume ratio is 1.5-2:1.
According to the utility model specific embodiment, in the described method, the total weight with the liquid Mn-rich slag is
100% meter, manganese content are greater than 15%；
In specific embodiment of the present invention, liquid Mn-rich slag used is about 20% containing manganese.
According to the utility model specific embodiment, in the described method, the total weight with the ferrosilicon molten iron is
100% meter, silicone content 14-28%；In specific embodiment of the present invention, ferrosilicon Silicon Content of Hot Metal used is about
27%.
According to the utility model specific embodiment, in the described method, the small tolerance bottom blowing stirring is in 25-
Bottom blowing stirring is carried out under 50L/min (such as 30L/min) tolerance.Wherein, the tolerance is related to treating capacity.
According to the utility model specific embodiment, in the described method, the bottom blown gas is inert gas, packet
Include nitrogen or argon gas.
According to the utility model specific embodiment, in the described method, the step (2), comprising: N grades of machines of starting
N grades of pumps of tool vacuum pump are completed forvacuum, are ready at vacuum after controlling the pressure arrival 10KPa in dip pipe
Reason.
According to the utility model specific embodiment, in the described method, in the step (3), the target processing
Height can be calculated according to the size of specific pouch-type and vacuum chamber, reach vacuum chamber dip pipe after vacuum degree as long as meeting
It is inserted into molten iron 50-200mm；In specific embodiment of the present invention, which is usually 400-600mm.
According to the utility model specific embodiment, in the described method, the step (3), comprising:
After ladle is raised to target processing height, when the indoor pressure of the vacuum reaches 5KPa, it is true to start N grades of machinery
N-1 grades of pumps of sky pump；When the indoor pressure of the vacuum reaches 2KPa or less, N-2 grades of N grades of oil-sealed rotary pumps of starting
Pump, to carry out vacuum pumping；Increase the tolerance of bottom blown gas simultaneously to 50-70L/min；When the indoor pressure reduction of the vacuum
When to 133Pa or less, whole bottom blowing pipelines are opened, continue to increase the total flow of bottom blown gas to 120-150L/min.
According to the utility model specific embodiment, in the described method, in the step (4), the vacuum refining
Circulation completes that judgement can be observed by the high-temperature vacuum video camera being arranged in vacuum chamber, specifically: it is taken the photograph by the high-temperature vacuum
The state of camera observing response flue gas, flue dust is dimmed compared with flammule color under normal conditions thinks to be basically completed.
In addition, the specific amplitude that the utility model reduces ferrosilicon molten iron level described in step (4) does not do specific requirement, this
Field technical staff can need to be calculated according to field operation.
According to the utility model specific embodiment, in the described method, can be adjusted according to the severe degree of reaction
The flow with gas is stirred in vacuum degree and bottom blowing, but is the need to ensure that the vacuum degree and bottom blowing stir the flow with gas in the application
In the range of restriction.
According to the utility model specific embodiment, wherein the bottom end of the dip pipe of the vacuum chamber be slope structure (i.e.
The slope structure formed after the beveling of the bottom end of cylindric dip pipe), it, should after ferrosilicon molten iron is inserted into the lower end of the dip pipe
Structure can make vacuum chamber decline side (during i.e. ferrosilicon molten iron circulates, ferrosilicon molten iron decline with liquid Mn-rich slag
The side of contact is decline side) than uplifted side, (during i.e. ferrosilicon molten iron circulates, ferrosilicon molten iron ascends into vacuum chamber
Side is uplifted side) want low, such ferrosilicon molten iron will come into full contact with during decline with clinker to react.
In the ferroalloy process for vacuum refining provided by the utility model, firstly, ferroalloy circulating vacuum will be used for
The ladle of refining is put on ladle car, and then liquid Mn-rich slag is added in the backpack body of the ladle, manganese-silicon mine heat
Furnace directly goes out ferrosilicon molten iron (liquid manganese-silicon) into the backpack body of ladle；The ladle car is reached into vacuum processing again
Position, connects the quick coupling of bottom blowing valving station, starts the bottom blowing valving station of ladle, be blown into inert gas；Then pass through jacking
Device promotes ladle car, and makes to start N grades of oil-sealed rotary pumps, when in vacuum chamber in vacuum chamber dip pipe lower end insertion molten iron
Pressure when reaching a certain level, liquid manganese-silicon starts the cycle over flowing, into vacuum chamber after decline and pour in Mn-rich slag；Liquid
State manganese-silicon vacuum chamber recycle several times, realize slag gold mixes and complete desiliconization reduction manganese reaction after, stopping vacuumize and
It blows, first desilication reaction is completed；Vacuum is then destroyed, ladle car is reduced, ladle car outputs lifting position, carries out subsequent place
Reason；Ladle is finally reached into position of skimming, operation of skimming is completed under dust excluding hood of skimming, molten iron hangs toward electric refining furnaces and carries out iron making
Operation.
In field of steel-making, either RH processing or VD processing are it is not desirable that occur slag, and increase inert gas use
Slag phenomenon can all occur when amount, and in technical solution provided by the utility model be exactly using slag phenomenon generation into
The oxidation of iron liquid is not afraid of in the refining of row ferroalloy, i.e. progress impeller in slurry pump, refining process yet.
It is set in carrying out Vacuum Degassing Process by ladle backpack body bottom end according to the utility model specific embodiment
The air brick set is blown, to promote the flowing of ferrosilicon molten iron and liquid Mn-rich slag；It can also be real by single vacuum chamber refining furnace
The refining of existing low capacity ladle；Vacuum pump system uses N grades of oil-sealed rotary pumps, both energy saving, can also realize vacuum degree
Flexible control, reduce the cost of production, vacuum pump system do not need very high vacuum degree, is intended merely to realize ferrosilicon molten iron
Circulation maintains certain vacuum degree, while when dip pipe is inserted into ferrosilicon molten iron, in order to realize good impeller in slurry pump,
The bottom end of vacuum chamber dip pipe should be positioned as close to slag gold liquid level；Using the stirring of atm number, the ferrosilicon molten iron after circulation is just
Can constantly be contacted with slag blanket, while molten iron during circulating also constantly with slag blanket haptoreaction；Slag blanket and containment wall
Substantially keep opposing stationary, which reduces the flue gas in treatment process is excessive, molten iron reacts mainly with clinker in vacuum
It is carried out under chamber interior slag blanket, flue gas can be taken away by mechanical vacuum pumping system, and outlet after cooling depositing dust processing is carried out to it.
Compared with traditional shaking ladle process, the utility model is mainly the mode by using vacuum refining, reinforces alloy refining
Impeller in slurry pump speed and control conversion zone in the process, can be improved the quality and efficiency of refining；
Refine it is described for ferroalloy circulating vacuum refining ladle in carry out, reduce ladle be added shaking ladle with
And from shaking ladle again tapping to ladle operation, without be arranged shaking ladle refining dust pelletizing system, can prevent in refining process
Flue dust is excessive, avoids smoke contamination；
Reduce ladle-to-ladle number of operations using technical solution provided by the utility model, reduces the loss of heat；
The processing time is shortened, to also reduce the temperature loss in refining process；
The coefficient of admission of the ladle for being used for the refining of ferroalloy circulating vacuum used in the utility model is higher, can be with
Reach 0.8 or more, main reaction carries out at slag gold interface, washes away reduction to the resistance to material of ladle, extends service life, reduces
Comprehensive refractory consumption.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is that the structure provided by the utility model embodiment 1 for the ladle of ferroalloy circulating vacuum refining is shown
It is intended to；
Fig. 2 is the structural schematic diagram of ferroalloy vacuum refining system provided by the utility model embodiment 2.
Main Reference label declaration:
1, the first air brick；
2, backpack body；
3, inert gas bubble；
4, ferrosilicon molten iron；
5, liquid Mn-rich slag；
6, vacuum chamber；
7, three-level oil-sealed rotary pump；
8, bottom blowing valving station；
9, ladle car；
10, jacking apparatus；
11, the ladle for the refining of ferroalloy circulating vacuum；
12, electric refining furnaces；
13, manganese-silicon mineral hot furnace；
14, conventional ladle.
Specific embodiment
The implementation process of the utility model and having for generation is described in detail below by way of specific embodiment and Figure of description
Beneficial effect, it is intended to help reader to more fully understand the essence and feature of the utility model, not as to this case enforceable range
Restriction.
Embodiment 1
Present embodiments provide a kind of ladle for the refining of ferroalloy circulating vacuum, wherein the structure of the ladle
Schematic diagram is as shown in Figure 1, from figure 1 it appears that the ladle includes backpack body 2 and vacuum chamber 6；The backpack body 2 be for
The backpack body of ferrosilicon molten iron 4 and liquid Mn-rich slag 5 is contained, the vacuum chamber 6 is the open tubular construction in lower end；The vacuum chamber 6
Above backpack body 2；
The vacuum chamber 6 includes vacuum chamber top and dip pipe, and the bottom end of the dip pipe is slope structure, the dip pipe
Lower end is inserted into ferrosilicon molten iron, and its lower end is formed by slag gold liquid between ferrosilicon molten iron and liquid Mn-rich slag
Face；
The bottom surface of the backpack body 2 is provided with the first air brick 1, which is located at dipping tube hub, and
It is connected by bottom blowing pipeline with bottom blowing valving station 8；
The entrance that the outer wall top on the vacuum chamber top opens up is connected with three-level oil-sealed rotary pump 7；
In the present embodiment, the distance between the dip pipe bottom end and slag gold liquid level are 50-200mm；
In the present embodiment, the bottom surface of the backpack body 2 is additionally provided with 2 blocks of air bricks, is set to except dip pipe.
Embodiment 2
Present embodiments provide a kind of ferroalloy vacuum refining system, wherein the knot of the ferroalloy vacuum refining system
Structure schematic diagram is as shown in Fig. 2, from figure 2 it can be seen that the system includes the offer of embodiment 1 for ferroalloy circulating vacuum essence
Ladle 11, electric refining furnaces 12, manganese-silicon mineral hot furnace 13, ladle car 9, jacking apparatus 10 and the conventional ladle 14 of refining；
The electric refining furnaces 12 are for producing liquid Mn-rich slag and receiving the molten iron for the refining of ferroalloy circulating vacuum
Wrap gained molten iron and the electric furnace refined to the molten iron after 11 circulating vacuums refine；
The manganese-silicon mineral hot furnace 13 is the manganese-silicon mineral hot furnace for producing ferrosilicon molten iron；
The ladle 11 for the refining of ferroalloy circulating vacuum be containing ferrosilicon molten iron and liquid Mn-rich slag, and
The ladle of circulating vacuum refining is carried out in the inner；
The routine ladle 14 is that the ladle of products therefrom is refined for containing circulating vacuum；
Ladle car 9, for transporting the ladle 11 for the refining of ferroalloy circulating vacuum；
The jacking apparatus 10 is used for the molten iron that ferroalloy circulating vacuum refines for placing the ladle car 9, and by this
Packet 11 is raised to target processing height.
Embodiment 3
Present embodiments provide a kind of ferroalloy process for vacuum refining, wherein the ferroalloy process for vacuum refining is to use
What ferroalloy vacuum refining system provided by embodiment 2 was realized, the method includes steps in detail below:
Step 1: the liquid Mn-rich slag of the about 20wt% containing manganese of electric refining furnaces goes out to follow to what embodiment 1 provided for ferroalloy
In the backpack body of the ladle of ring vacuum refining, about 18 tons, while manganese-silicon mineral hot furnace goes out (molten iron in ferrosilicon molten iron to the iron packet
Siliceous about 27wt%), about 15 tons of ferrosilicon molten iron of every furnace, then will be in the lower end insertion ferrosilicon molten iron of the dip pipe of vacuum chamber.By iron
Water hired car reaches under manganese-silicon mineral hot furnace furnace is vacuum-treated position；The bottom blowing pipeline being connected with the first air brick is connected to use
Inert gas carries out small tolerance 30L/min bottom blowing stirring, forms inert gas bubble 3.
Step 2: forvacuum, starting three-level oil-sealed rotary pump the third level pump, when vacuum chamber dip pipe reach 10KPa with
Afterwards, it is ready for being vacuum-treated.
Step 3: ladle car is run on jacking apparatus, starts jacking apparatus, ladle car is raised to the target of processing
Highly, the depth about 200mm of vacuum chamber dip pipe insertion ferrosilicon molten iron；Start vacuum pumping.
Step 4: when vacuum indoor pressure reaches 5KPa, the second level pump of starting three-level oil-sealed rotary pump；Work as vacuum chamber
When interior pressure reaches 2KPa or less, the first order pump of starting three-level oil-sealed rotary pump；Increase bottom blown gas (inert gas) simultaneously
Tolerance is to 70L/min；When the vacuum pressure in vacuum chamber is reduced to 133Pa or less, it is total to increase bottom blown gas (inert gas)
Flow is to 150L/min, and three air bricks open simultaneously at this time.
Step 5: being calculated according to pertinent literature, the circular flow of this equipment for vacuum refining is about 8t/min, therefore ferrosilicon iron
Water can complete one cycle process less than 2min.Taking circulation factor is 3, then can complete within 6 minutes the reaction of pre-desiliconizing；
And when being refined using this field routine shaking ladle technology, this period is generally in 10-15min or more.
Step 6: after vacuum refining circulation is completed, using nitrogen vacuum breaker, after molten iron level reduces, reducing ladle
On vehicle to track, reaches lifting position and carry out subsequent processing.
Step 7: ladle being hung into position of skimming, after dust pelletizing system of skimming is opened, starts operation of skimming.
Step 8: after completion of skimming, ladle hangs toward electric refining furnaces and carries out refinery process.
The above, only specific embodiment of the utility model cannot limit the range that utility model is implemented, institute with it
With the displacement of its equivalent assemblies, or according to equivalent variations made by the utility model patent protection scope and modification, should all still fall within
The scope that this patent is covered.
Claims (5)
1. a kind of ladle for the refining of ferroalloy circulating vacuum, which is characterized in that described for ferroalloy circulating vacuum essence
The ladle of refining includes backpack body (2) and vacuum chamber (6)；The backpack body (2) is for containing ferrosilicon molten iron and liquid Mn-rich slag
Backpack body, the vacuum chamber (6) are the open tubular construction in lower end；The vacuum chamber (6) is located above backpack body (2)；
The vacuum chamber (6) includes vacuum chamber top and dip pipe, and the bottom end of the dip pipe is slope structure, under the dip pipe
In end insertion ferrosilicon molten iron, and its lower end is formed by slag gold liquid level between ferrosilicon molten iron and liquid Mn-rich slag；
The bottom surface of the backpack body (2) is provided with the first air brick (1), which is located at dipping tube hub,
And it is connected by bottom blowing pipeline with bottom blowing valving station (8)；
The entrance that the outer wall top on the vacuum chamber top opens up is connected with N grades of oil-sealed rotary pumps.
2. ladle according to claim 1, which is characterized in that the distance between the dip pipe bottom end and slag gold liquid level
For 50-200mm.
3. ladle according to claim 1 or 2, which is characterized in that the backpack body (2) if bottom surface be additionally provided with and parch
Gas brick, is set to except dip pipe.
4. ladle according to claim 3, which is characterized in that the number of the air brick is 2-4 block.
5. a kind of ferroalloy vacuum refining system, which is characterized in that the ferroalloy vacuum refining system includes claim 1-4
Described in any item ladle for the refining of ferroalloy circulating vacuum, electric refining furnaces (12), manganese-silicon mineral hot furnace (13), iron
Water hired car (9) and jacking apparatus (10)；
The ladle for the refining of ferroalloy circulating vacuum is containing ferrosilicon molten iron and liquid Mn-rich slag, and in the inner
Carry out the ladle of circulating vacuum refining；
The electric refining furnaces (12) are for producing liquid Mn-rich slag and receiving the ladle for the refining of ferroalloy circulating vacuum
Gained molten iron and the electric furnace that the molten iron is refined after circulating vacuum refining；
The manganese-silicon mineral hot furnace (13) is the manganese-silicon mineral hot furnace for producing ferrosilicon molten iron；
The ladle car (9) is used to transport the ladle for the refining of ferroalloy circulating vacuum；
The jacking apparatus (10) is used for the molten iron that ferroalloy circulating vacuum refines for placing the ladle car (9), and by this
Packet is raised to target processing height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822164481.6U CN209260138U (en) | 2018-12-20 | 2018-12-20 | Ladle and ferroalloy vacuum refining system for the refining of ferroalloy circulating vacuum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822164481.6U CN209260138U (en) | 2018-12-20 | 2018-12-20 | Ladle and ferroalloy vacuum refining system for the refining of ferroalloy circulating vacuum |
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| Publication Number | Publication Date |
|---|---|
| CN209260138U true CN209260138U (en) | 2019-08-16 |
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|---|---|---|---|
| CN201822164481.6U Active CN209260138U (en) | 2018-12-20 | 2018-12-20 | Ladle and ferroalloy vacuum refining system for the refining of ferroalloy circulating vacuum |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109439848A (en) * | 2018-12-20 | 2019-03-08 | 中冶京诚工程技术有限公司 | A kind of ladle, ferroalloy vacuum refining system and method |
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2018
- 2018-12-20 CN CN201822164481.6U patent/CN209260138U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109439848A (en) * | 2018-12-20 | 2019-03-08 | 中冶京诚工程技术有限公司 | A kind of ladle, ferroalloy vacuum refining system and method |
| CN109439848B (en) * | 2018-12-20 | 2023-08-11 | 中冶京诚工程技术有限公司 | Ladle and ferroalloy vacuum refining system and method |
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