CN107974529A - The method of converter alloy on-line heating combination energy-saving and frequency-variable synthesis lifting steel-making efficiency - Google Patents
The method of converter alloy on-line heating combination energy-saving and frequency-variable synthesis lifting steel-making efficiency Download PDFInfo
- Publication number
- CN107974529A CN107974529A CN201711194917.XA CN201711194917A CN107974529A CN 107974529 A CN107974529 A CN 107974529A CN 201711194917 A CN201711194917 A CN 201711194917A CN 107974529 A CN107974529 A CN 107974529A
- Authority
- CN
- China
- Prior art keywords
- alloy
- converter
- frequency conversion
- motor
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The method for lifting steel-making efficiency is integrated the invention discloses a kind of converter alloy on-line heating combination energy-saving and frequency-variable, belongs to the technical field of metallurgy industry steelmaking complex reducing energy consumption；Alloy on-line heating device is installed in converter platform position first, using rotation laminar flow internal-mixing burner in alloy heating furnace, the discharge port and charge door of alloying furnace be not on a center line；Alloy material is directly entered alloy heating furnace by feeding port, and the alloy material after heating directly is put into converter before converter tapping by discharge port after being heated in stove；To once dust collection of converter wind turbine, using converter inclining iron making signal as frequency conversion raising speed signal source, converter inclining is tapped into signal as frequency conversion speed-down signal source, realizes high voltage frequency conversion system Automatic Control.The present invention reduces the advantage of tapping temperature by alloy on-line heating device, reduces duration of blast, and supporting frequency conversion system reduces the high-speed cruising time, reduces energy consumption to the full extent.
Description
Technical field
The invention belongs to the technical field of metallurgy industry steelmaking complex reducing energy consumption, and in particular to converter alloy on-line heating
The energy saving retrofit technology of lifting steel-making efficiency skill is integrated with reference to energy-saving and frequency-variable.
Background technology
In recent years, make steel in technological progress, scientific and technical innovation and technical equipment etc., all achieve rapid progress.
Main production process technical-economic index is obviously improved, and enhances energy management and multi-faceted aggregate measures, all kinds of sections
Can technology be applied to successively in process for making, large and medium-sized enterprise's process energy consumption steady decrease, portion of techniques economic indicator approach or
Person reaches advanced world standards.Steel products chain in China's is constantly extending at present, and energy consumption per ton steel is also there are ascending factor, by difference
The power save mode of type fully combines to form new energy saver mode and is just particularly important.
Convertor steelmaking process is mainly that the high temperature physical chemistry such as carbon drop, heating, dephosphorization, desulfurization and component controlling is anti-
The process answered, its technological operation is then control oxygen supply, slag making, temperature and adds alloy material etc., to obtain required molten steel,
And finally it is cast into qualified strand.Key link of different types of alloy material as pneumatic steelmaking is added, for the product of steel grade
Matter is most important.Tapping temperature is to make steel the key factor of energy consumption, the process added before tapping as pneumatic steelmaking of alloy material,
Directly affect the change of temperature.Alloy material to be added is heated to certain temperature by alloy heating in advance, make alloy material with
During molten steel reacts, the loss of temperature is reduced to the greatest extent.Steelmaking process can produce substantial amounts of coal gas of converter, carbon monoxide
Content is very high, it is contemplated that the necessity of dedusting and coal-gas recovering, generally carries out dedusting using primary dedusting wind turbine to steelmaking process
Operation is carried out at the same time the recycling of coal gas of converter.
Old-fashioned alloy heating system is roughly divided into two classes according to structure type：
(1) it is distributed on converter platform, charge door after Converter is transported to by forklift after heating；
(2) high hopper form heats alloy, and charge door after Converter is delivered to by chute.
The operating of motor power frequency is usually taken in primary dedusting blower fan system, by fluid coupling according to technological requirement to wind turbine
Rotating speed is adjusted.
There is problems for conventional alloys heating unit：
(1) alloy temperature loss is big.Old-fashioned alloy heating unit accurate definition should belong to the category heated offline.Alloy material
Heated in fixed place using alloy heating equipment, the alloy material after being heated also needs to be transported to steel smelting platform, for converter
Steel-making uses, and in transport process, the Wen Duxiajiang of alloy material is more, and can not all play alloy in steelmaking process adds
The effect of heat, it is larger to the temperature losses of alloy material.
(2) heating time is grown：Conventional alloys material is transported in heating furnace before steel-making starts, uninterrupted heating in case
Steel-making uses, it usually needs 24 uninterruptedly heat when small.Waste for imflammable gas and electric energy is obvious.
(3) complicated investment is big：The investment of old-fashioned alloy heating equipment generally million between millions of, and tradition
Alloy heating equipment is bulky, and usual floor space can reach more than ten or even tens square metres, and complicated, maintenance is with after
Phase maintenance replacement component working amount is big, and process is cumbersome.
(4) alloy heating-up temperature is low：For alloy material in heating process, since flame rigidity is not strong, inventory is big, causes to close
Gold material heating is uneven, and general temperature is relatively low.For pneumatic steelmaking can not real meaning realize reduce tapping temperature effect.
Traditional primary dedusting motor control model is operated for a long time using power frequency, and motor is former with fluid coupling (abbreviation liquid coupling)
While being connected, power frequency operation, power consumption is serious, manually by fluid coupling manual governing, during for how to accurately hold lifting speed
Between can not ensure.
Under the overall situation of social energy conservation emission reduction, the equal relative narrowness of application range of different types of power-saving technology, for
Be all reduce energy consumption single point：Economize on electricity；Solar term；Raw material is saved, reduces the core emphasis of energy consumption in a word
It is relatively single.With the raising of technical merit, new-type alloy heating unit and high-pressure frequency-conversion energy saving means come into being, but in reality
Institute's application field is independently of each in the application process of border, alloy heating is tended to improve product quality, and energy-saving and frequency-variable tends to reduce
Power consumption, with respect to traditional mode, energy consumption levels have a degree of reduction, but old-fashioned alloy heating unit shortcoming is many
More, energy-saving and frequency-variable also stays at the old model controlled by manpower.
Steelmaking converter alloy on-line heating device combination energy-saving and frequency-variable synthesis lifting steel-making efficiency technology uses new-type conjunction
Golden on-line heating technology automatically controls the mode of being combined with high-pressure frequency-conversion, while solves to reduce tapping temperature and save electric energy two
Energy consumption problem.
The content of the invention
For current conventional alloys heating unit there are alloy temperature loss is big, heating time is long, complicated investment is big,
The problems such as alloy heating-up temperature is low, and the problems such as power consumption existing for traditional primary dedusting motor is serious, the present invention provides turn
The method of stove alloy on-line heating combination energy-saving and frequency-variable synthesis lifting steel-making efficiency.
The method of the converter alloy on-line heating combination energy-saving and frequency-variable synthesis lifting steel-making efficiency of the present invention, including：
Step 1, alloy on-line heating device is installed in converter platform position；Alloy on-line heating device include feeding port,
Alloy heating furnace and discharge port, in alloy heating furnace using rotation laminar flow internal-mixing burner, the discharge port of alloying furnace and plus
Material mouth is not on a center line；Alloy material is directly entered alloy heating furnace by feeding port, passes through discharging after being heated in stove
Alloy material after heating is directly put into converter by mouth before converter tapping；
Step 2, to once dust collection of converter wind turbine, reducing energy consumption is carried out to motor using high voltage frequency conversion system, cancels former system
Unite fluid coupling control model, using converter inclining iron making signal as frequency conversion raising speed signal source, converter inclining is tapped signal
As frequency conversion speed-down signal source, high voltage frequency conversion system Automatic Control is realized.
In the step 1, the rotation laminar flow internal-mixing burner includes symmetrical in tangent line along furnace body surrounding
Multiple burners.Be provided with flow multiplier in the burner, gas medium under burner effect with combustion air
Mixing, by the catalytic unit in burner, under the influence of catalyst, ignition, then by flow multiplier, is flowing
Measure inside multiplier, by concussion under specific physics magnetic fields, combustion gas micel is broken up, is diminished.The feeding port
Be provided with can 360 degree of rotating charging protective covers, the top for the protective cover that feeds is connected with once dust collection of converter flue, by high pressure
Frequency conversion system controls dedusting.
Advantages of the present invention is with good effect：
(1) it is small using the alloy on-line heating device of the present invention, alloy temperature loss.Heat form is turned again by heating offline
Operating is changed into on-line heating form, and the alloy material after being heated directly is launched in online ladle, when saving the turnover of alloy material
Between reduce the loss of temperature, high temperature alloy material is played one's part to the full in pneumatic steelmaking tapping temperature is reduced.
(2) the method for the present invention uses high-strength internal flame temperature caused by the extremely strong flame collocation new technology of degree of rigidity,
Alloy material is heated to higher temperature in short time, by equipment discharge port before converter tapping directly by the alloy after heating
Material input converter, in whole process, the alloy material heat-energy losses after being heated save alloy to the full extent close to zero
The heat effect of material, reduces the heating time of converter molten steel, reduces tapping temperature, reduce including oxygen indirectly
The consumption of which kind of additional materials.Truly realize the theory of alloy on-line heating.
(3) present invention carries out reducing energy consumption using high voltage converter to motor, realizes frequency conversion system Automatic Control, cancels
Original system fluid coupling control model, using converter inclining iron making signal as frequency conversion raising speed signal source, converter inclining is tapped
Signal is solved the problems, such as to control frequency conversion system Up and down speeding manually using automated procedures, run as frequency conversion speed-down signal source
Process Automatic Control, at utmost saves electric energy.
(4) the method for the present invention is realized on the basis of energy-saving and frequency-variable automatically controls, and is reduced by alloy on-line heating device
The advantage of tapping temperature, reduces duration of blast, and supporting frequency conversion system reduces the high-speed cruising time, reduces energy to the full extent
Consumption.
Brief description of the drawings
Fig. 1 is the structure diagram of alloy on-line heating device of the present invention；(a) it is front view, (b) is side view
Figure；
Fig. 2 is the high voltage frequency conversion system automatic speed regulating control programme diagram that the present invention uses；
Fig. 3 is the effect diagram for shortening the steel-making cycle using the method for the present invention；
Fig. 4 is the front and rear effect contrast figure that converter alloy heating is carried out using the method for the present invention.
In figure：
1- alloy heating furnaces；2-360 degree rotates feeding port；3- discharge ports；4- exhaust pipings；5- air headers；
6- burners；7- Hand-operated butterfly valves；8- columns；9- lower margins；10- bearings.
Embodiment
Below in conjunction with drawings and examples, the present invention is described in further detail.
The present invention fully merges two kinds of ideas of energy-saving of steelmaking converter alloy on-line heating device and energy-saving and frequency-variable, is formed new
Energy-saving pattern, effectively economize on electricity and reduce steel-making tapping temperature, comprehensive lifting steel-making efficiency.
The method of converter alloy on-line heating combination energy-saving and frequency-variable synthesis lifting steel-making efficiency provided by the invention, main bag
Include：Using alloy on-line heating device, big, heating time length is lost to solve alloy temperature existing for conventional alloys heating unit
The problems such as；To realize that high voltage frequency conversion system automatic speed regulating controls, converter inclining signal is taken as signal source, converter is leaned forward iron making,
Hypsokinesis is tapped, and solves the problems, such as to control frequency conversion system Up and down speeding manually using automated procedures, operational process Automatic Control,
At utmost save electric energy.
First, the method for the present invention for conventional alloys heating unit there are the problem of, should using alloy on-line heating device
Device is directly installed on converter platform position, and alloy material is directly entered alloy on-line heating device by feeding port, passes through discharging
Alloy material after heating is directly put into converter by mouth before converter tapping.Using new alloy on-line heating device, heated mould
Formula is changed to on-line heating form by conventional offline heating transport form, uses Novel heating structure, novel burner, new technology
Flame, ensures flame rigidity, and heating-up temperature is high in the short time, effectively reduces tapping temperature.
As shown in Figure 1, being alloy on-line heating device used in the method for the present invention, belong to innovative product, the device area
Not in conventional alloys heater, it is directly installed on converter platform position.Alloy on-line heating device mainly adds including alloy
Hot stove 1, feeding port 2, discharge port 3, exhaust piping 4 etc..Thrown as shown in Figure 1, being provided with 360 degree of rotations above alloy heating furnace
Material mouth 2, alloy material are directly entered alloy heating furnace 1 by feeding port 2, air header 5, burner are provided with alloy heating furnace 1
6, distinguish manually 7 controlling switch of butterfly valve.Exhaust piping 4 is located above alloy heating furnace, is controlled by a Hand-operated butterfly valve 7
Switch.Alloy heating furnace 1 is installed on converter platform position by column 8 and lower margin 9, column 8 and 1 junction of alloy heating furnace
Bearing 10 is provided with to support.
New burner is used in 1 furnace body of alloy heating furnace of the present invention, burner is the internal-mixing burning of rotation laminar flow
Device.Rotate laminar flow internal-mixing burner include it is some along furnace body surrounding in the symmetrical burner of tangent line, rotate in laminar flow and mix
Formula burner makes combustion gas be mixed in advance in burner with air, and subsequently into burning in furnace body, gas medium burning is abundant, combustion
Burn efficiency and intensity is high.Burner along furnace body surrounding in tangent line it is symmetrical, the fuel gas mixed with air in furnace body into
Rotation, laminar-flow type distribution, ensure homogeneous heating, fully meet to use technological requirement.Novel burner produces reproducibility flame, section
Energy, low consumption, efficiently, effectively avoid problem of oxidation of the alloy in heating process.The heating time of novel burner significantly contracts
Short, typical time only needs to heat for 15-20 minutes alloy for being added to online ladle.Alloy of the invention according to addition
Amount is different, independently judges to control combustion air air inflow by automated procedures, realizes the obvious effect that maximum air-fuel ratio reaches 6
Fruit, effectively shortens alloy material heating time.
The alloy on-line heating device of the present invention, integral device is simple in structure, and equipment is poured by repeatedly improving using overall
Form is built, there is no unnecessary maintenance workload.Only 2 square metres or so of integral device floor space, has effectively saved use
Space.Specifically, the new alloy on-line heating device of the present invention has abandoned the resistance to material form in inside of conventional alloys stove, alloying furnace
Furnace body (in addition to vertex of a cone) is using being integrally cast, and furnace body wall thickness is more than 150mm, is formed using casting, material Si4Mo, resists
Pound wear-resisting, effective 1200 DEG C of heatproof.
For alloy material in heating process, single alloy material heating amount is few, only need to meet online ladle alloy usage amount demand
.The alloy on-line heating device of the present invention is employed new technology flame, and flame rigidity is extremely strong, and temperature can be in 15-20 minutes
Alloy material is heated between 400-600 degree.New technology flame why can reach rigidity extremely strong and flame internal flame temperature compared with
Height, the technology of realization are：Flow multiplier and catalytic unit are provided with burner, gas medium is under burner effect
It is sufficiently mixed with combustion air, by the catalytic unit in burner, under the influence of catalyst, ignition, then passes through
Flow multiplier, inside flow multiplier, by concussion under specific physics magnetic fields, combustion gas micel is broken up, is become
It is small so that micel is more active, accelerates combustion velocity, and increase calorific value embodies, and more high fever is obtained under equal gas consumption
The output kinetic energy of value and bigger, and then realize that flame rigidity is strong, save the purpose of gas consumption.
Secondly, the method for the present invention is directed to once dust collection of converter wind turbine, using variable frequency energy saving reforming automatic control technology.Tradition
High-pressure frequency-conversion control once dust collection of converter wind turbine adjusts high voltage variable using manually pattern according to rhythm of production and field condition
Frequency rotating speed.Signal source of the present invention using converter inclining position signal as high-pressure frequency-conversion lifting speed, realizes Automatic Control.Specifically
Ground, the present invention carry out reducing energy consumption using high voltage frequency conversion system to motor, cancel the original fluid coupling of high voltage frequency conversion system
Control model, using converter inclining iron making signal as frequency conversion raising speed signal source, signal is tapped as frequency conversion speed-down using converter inclining
Signal source, realizes frequency conversion system Automatic Control.
As shown in Fig. 2, the program schematic diagram of automatic speed regulating control is realized for high voltage frequency conversion system.In program segment 16, stove
During preceding iron making, high speed setting value is to intermediate variable, and when stokehold is tapped, low speed setting value is to intermediate variable；, will in program segment 17
Intermediate variable is converted to 4-20mA current signals and is sent to frequency converter；In program segment 18, frequency converter sends signal control motor
Rotating speed.
The present invention is when implementing energy-saving and frequency-variable control, it is necessary to carry out following key problem in technology transformation to system：
(1) mechanical system is transformed.
Stop solution oil circulating pump, cooling pump simultaneously properly carry out encapsulation process, and whole circulating cooling system is removed.Root
Overhead traveling crane is used according to field condition, lifting removes fluid coupling.
Remove motor.According to actual conditions, the dismounting work of periphery circuit is carried out to transformation motor.Made according to field condition
With overhead traveling crane, lifting removes motor to home.
Base processing.According to actual conditions, motor base can partly reuse, and stoste coupling position is handled, increase branch
Support base re-starts pouring for portion, it is ensured that the load-bearing of motor base and overall stability before and after motor movement.
And the channel steel base for being adapted to motor to use is installed on foundation of civil work, in order to the maintenance and replacement of later stage motor.
Motor is in place and connecting shaft.After motor base possesses motor condition in place, motor is lifted to specific bit using overhead traveling crane
Put, between motor and wind turbine, motor shaft is attached with fan shaft using diaphragm coupling and (takes into full account that axle position is shifted one's love
Condition).Need to re-start that base is levelling and dynamic balance running after motor is in place, and then carry out secondary pour.
Increase dilute oil lubrication station.Since primary dedusting motor is mostly oil film bearing shell motor, it is necessary to install new after motor is in place
Dilute oil lubrication station, stoste coupling is available with the oil pipe before motor shaft, after axis, according to live actual production demand and investigation number
According to new dilute oil lubrication station should meet outlet oil pressure requirement, and Lubricating-oil Station system switches for double generator redundancy, avoids due to failure
Caused to supply shortage of oil, original system top petrol tank can reuse, and when there is powering-off state, when Oil pump electrical machinery can not work, a high position is oily
Case is used for supplemental lubrication in short-term, avoids causing lubrication trouble.
(2) electric system transformation.
Increase high voltage frequency conversion system is used to control primary dedusting wind turbine, realizes energy-saving and frequency-variable, drops motor in production gap
Speed is to standby dedusting frequency, the big reduction energy consumption of most great achievement.
(3) automated system is transformed.Using converter inclining iron making signal as frequency conversion raising speed signal source；Converter inclining is tapped
Signal realizes frequency conversion system Automatic Control as frequency conversion speed-down signal source.
It is provided by the invention to use steelmaking converter alloy on-line heating device combination energy-saving and frequency-variable synthesis lifting steel-making efficiency
Method, pneumatic steelmaking alloy material is utilized into new-type alloy on-line heating device, in steelmaking process quick (in 15-20 minutes)
Alloy material is heated between 400-600 degree.The key problem in technology wherein realized is, when shortening the blowing of pneumatic steelmaking
Between, except needing that the alloy material of input is preheated, and keep outside temperature, it is also necessary to solve following relevant issues：
(1.1) loading problems.The charge door of alloy on-line heating device is located on converter platform, against furnace walls and converter
Driving device, position is compact, and high requirement is proposed to alloying furnace on-line heating, should consider single most in the design
Big feeding quantity, also to take into account scene position, for this present invention devise can 360 degree of rotating charging protective covers, such as attached drawing 1
It is shown, it can fully ensure that the feasibility of alloy on-line heating.
(1.2) gather dust problem.In order to ensure dust collection effect, by the top of rotary feeding cover and once dust collection of converter flue phase
Connection, controls frequency conversion dedusting by high voltage frequency conversion system, can effectively discharge caused by the dust produced during charging and burning
Exhaust gas.
(1.3) heating problems.Using new technology burner, online alloy heating time is fully ensured that at 15 minutes or so,
Several tons of alloy materials are heated to 500 DEG C or so, and allow alloy material sufficiently to be heated.
(1.4) control problem.The control system of alloy on-line heating device employs two kinds of heating modes, is small fire respectively
And big fire, when detect have material in stove when, system automatically by flame adjust to big fire toast, special time (time adjusts)
Afterwards, system is automatically adjusted flame to small fire keeping warm mode.If discharging or when detecting in stove without material, system is also automatically by fire
Flame is adjusted to small fire state, it can be achieved that efficient automated operation.
(1.5) material test problems.The key signal point changed as small fire and big fire, the heating to alloy have to pass
Important effect, traditional weight dropper charge level indicator, not only price is high, but also service life is short, and new-type alloy on-line heating device makes
With the mechanical material detection device of Custom Prosthesis, it is contemplated that alloy material size shape is irregular, by mechanical material detection device
Front end material detection steel disc be customized to the steel plate being sized, while increase steel plate number, ensure alloy material in different directions
It can be detected in blanking process, effectively complete material detection process.By field practice, the non-convention of using effect
Think.
(1.6) blowing problem.Because the problem of converter position, the discharge port and charge door of alloying furnace cannot be at a centers
On line, alloy on-line heating device Proper Design is eccentric cone for this, solves the problems, such as blowing well.
(1.7) safety problem.Since alloy on-line heating device is mounted directly and after converter platform, online converter mouth is work
The place that people passes through repeatedly, for the power-off in baking process, dies, gas leak etc., it is necessary to has protection well and safety
Measure.The signals such as flame detecting device, gaseous-pressure detection device, gas leakage alarm device are gathered by PLC, establishment is chain
Protective program, has accomplished perfect protection for a variety of safety problems being likely to occur, has ensured the safe operation of equipment.
(1.8) frequency conversion system acceleration and deceleration dc bus overpressure problems.Primary dedusting wind turbine belongs to technique wind turbine, frequent
In the case of acceleration and deceleration, dc bus overvoltage in produced problem i.e. moderating process is easiest to.The present invention have adjusted high voltage variable for this
The transformer reference voltage of display system, devises the frequency control program for adapting to new reference voltage, by adjusting into line transformer
Primary side primary voltage tapping gear, 10.5KV is adjusted to by 10KV, ensures secondary side voltage in normal output area, tune indirectly
Whole primary voltage detection plate, coordinates adjustment main program items protection value, it is ensured that moderating process occurs without problems.
The fusion of two kinds of power-saving technologies both can guarantee that alloy on-line heating device reduced tapping temperature by the method for the present invention,
The duration of blast shortened can be utilized again, and the frequency conversion dedusting system that acts through for reducing energy consumption is embodied.Pneumatic steelmaking is blown
The shortening of time is refined, the steel-making cycle is also shortened indirectly, accelerates overall rhythm of production, is played not for reducing ton steel cost
Negligible effect.
As shown in figure 3, using the method for the present invention shorten the comparison diagram in steel-making cycle for one.Alloy does not add before transformation
Heat, pneumatic steelmaking keep the rhythm of production in 18 minutes high speed cycles.By alloy on-line heating device after transformation, reduce and turn indirectly
Stove makes steel tapping temperature, shortens duration of blast, and high speed cycle time accelerated rhythm of production indirectly to 15 minutes, improved yield.
As shown in figure 4, using the gray-scale map of front and rear Contrast on effect for converter alloy on-line heating method of the present invention, left figure is
It is not used, right figure is to use the method for the present invention, it can be seen that alloy baking can effectively facilitate alloy and be melted with slag charge (containing carbon ball)：
It can be seen that have the part slag charge (containing alloy part) unfused when alloy does not toast from left figure.Alloy and slag during right figure alloy baking
Expect almost all fusing, this is because alloy melting is slow and also big to the heat absorption of molten steel around when alloy does not toast, and alloy and slag
Material almost adds and (it is short to add time interval) at the same time, along with the strong mixing of argon gas causes slag charge and unfused alloy toward ladle
Wall side is assembled, and just alloy is bundled together when slag charge runs into the alloy not melted in time, causes have bulk slag charge cannot
The phenomenon of fusing occurs.
Embodiment：
The object of the present invention is to save the energy, production cost is reduced, by the superposition of power save mode not of the same race, comprehensive drop
Low product cost.Lifting steel-making efficiency technology is integrated by two kinds by steelmaking converter alloy on-line heating device combination energy-saving and frequency-variable
Power-saving technology closely links together, energy-saving, cost efficiency.An instantiation is given below.
(1) original system production status (field case)
Wherein, Pe, Ue, Ie represent the rated power of wind turbine, rated voltage, rated current respectively, and cos Ф represent specified work(
Rate factor, Ne represent rated speed, IFortuneRepresent running current.
Totally 4 Fans, 1#, 2#, 3# wind turbine correspond to 1#, 2#, 3# converter air passage to once dust collection of converter system respectively, and 0# is
1#, 2#, 3# wind turbine standby fan, can make it substitute 1#, 2# or 3# wind turbine air feed respectively by adjusting the opening and closing of valve.4 electricity
Machine parameter is consistent, is bearing shell oil film motor, and rotating speed is adjusted by fluid coupling, and oil pipe is furnished between liquid coupling and motor and realizes electricity
Machine lubricates.Fans entrance valve opening about 80%, No way out valve, equipment year are run more than 330 days, 1# maintenance of fan during investigation
Shut down, for 0#, 2#, 3# wind turbine using 40min as cycle power frequency operation, wherein 18min operates in top gear, rotating speed about 1350rpm, fortune
Row electric current 120A, fan inlet pressure -15.1kpa, outlet pressure 0.5kpa；8min operates in low or first gear, rotating speed about 300rpm,
Running current 40A, fan inlet pressure -1.9kpa, outlet pressure -0.2kpa, the handoff procedure about 4min of high/low speed shelves.
Converter production process alloy-free on-line heating device preheats the alloy material of addition, and temperature loss is tighter
Weight.
Transform pattern：
Electric part increases high voltage frequency conversion equipment newly, according to technological requirement to load by removing former hydraulic coupler system
Carry out speed governing.
Primary dedusting wind turbine run per year 8000 it is small when calculate.
1) under power frequency state, annual power consumption Wd is：
Wd=(√ 3*UN*I1*0.7+1.732*UN*I2*0.3)*cosФ*8000
=11705548kWh
Wherein, UN、I1、I2Power-frequency voltage, high-speed cruising electric current, low speed running current are represented respectively.
2) such as frequency converter efficiency 97%, the maximum (top) speed ratio of fluid coupling is 0.98, rated speed feelings after Frequency Conversion Modification
Equivalent motor input current is 138A under condition, then annual power consumption is after speed governing：
Wb=power input to machines/frequency converter efficiency/liquid coupling maximum (top) speed is than * 8000
=10011115kWh
Then the energy saving ratio of Frequency Conversion Modification is about：
(11705548-10011115)/11705548=14.5%
0.56 yuan/degree is pressed such as the electricity charge to calculate, then annual saving expense is about：
1694433*0.56 950,000 yuan of ≈
Process for making increases alloy on-line heating device after Converter newly, and the input of the online roasting plant of alloy is tried out, it is most
Directly effect is exactly to reduce tapping temperature.Due to the reduction of tapping temperature, a series of benefit is brought to STEELMAKING PRODUCTION, is produced
Raw economic benefit is mainly indirect economic effect, is mainly analyzed from the following aspects：
1) since the reduction of tapping temperature, molten steel terminal oxygen content reduce, alloy (synthesis) recovery rate premise relatively on probation
Gao Liao, E# stoves improved 0.91%, F# stoves and improved 1.08% July.Here measuring and calculating is calculated by improving 1%.By this calculating ton
The reducible cost calculation of steel is as follows：
(1) in terms of plant statistics data, July, alloy consumption was 20.214tkg/t, then single stove alloy addition is
20.214 × 121=2445.894kg
(2) yield of alloy contrast improves 1% June, then alloy list stove addition reduction amount is 2445.894 × 1%
=24.458kg, convert reduces 0.202kg/t for loss per ton steel.
(3) the alloy synthesis average unit price in July is 5.775 yuan/kg (being free of tax), then the reducible cost of ton steel is
5.775 × 0.202=1.167 members/t (are free of tax)
2) after tapping temperature reduces, the smelting operation to furnace superintendent is favourable, especially the control to terminal, is conducive to terminal and protects carbon
Protect manganese.According to regression analysis of the steel mill to terminal tapping temperature and aim carbon, the residual manganese of terminal, tapping temperature often reduces by 10 DEG C,
Aim carbon rise 0.01%, residual manganese rise 0.025%；By present alloy price, residual manganese often raises 0.01%, and ton steel can drop
0.69 yuan of low alloying cost, can reduce ton steel production cost and (be free of for 0.69 0.01% × 0.025%=1.725 of ÷ members
Tax).
3) after tapping temperature reduces, the raising in furnace life is conducive to, fettling material consumption will relative reduction.According to steel mill pair
The statistics of tapping temperature and mending material relation, in the case where finishing slag TFe is constant, tapping temperature often reduces by 10 DEG C, and mending material disappears
Consumption reduces 0.5kg/ tons of steel, and by current 1.08 yuan/ton of steel of mending material unit price cost reduction, initial estimate can reduce a ton steel production
0.54 yuan of cost (is free of tax).
4) reduction of tapping temperature is conducive to improve the dephosphorization efficiency of converter, so as to reduce slag charge consumption, reduces metal damage
Lose.This economic benefit produced is not analysed in depth herein.
5) after alloy baking, temperature drop abnormal conditions caused by can preventing alloy humidity, did not go out because alloy July
Caused by humidity low temperature melt down or tapping process in molten steel seethe the accident for burning out equipment.
6) tapping temperature, which reduces, changes the high low speed accounting of duration of blast
The input of the online roasting plant of alloy is tried out, and most directly effect is exactly to reduce tapping temperature for it, be have impact on indirectly
Duration of blast in convertor steelmaking process, forms the high low speed accounting of new primary dedusting：
The reduction of tapping temperature have impact on pneumatic steelmaking duration of blast indirectly, high for primary dedusting fan speed regulation
Fast cycle time, directly affects the benefit of energy-saving and frequency-variable, this steelmaking converter alloy on-line heating device knot namely of the present invention
Where the advantage for closing energy-saving and frequency-variable synthesis lifting steel-making efficiency technology.
The benefit that simple energy-saving and frequency-variable is obtained is：Power saving rate 14.5%.0.56 yuan/degree is pressed such as the electricity charge to calculate, then every year
Saving expense is about：1694433*0.56 950,000 yuan of ≈
It is high that converter alloy on-line heating device combination energy-saving and frequency-variable synthesis lifting steel-making efficiency problem makes steel frequency conversion after realizing
Fast cycle time, benefit are：
Such as frequency converter efficiency 97%, the maximum (top) speed ratio of fluid coupling is 0.98, rated speed situation after Frequency Conversion Modification
Under equivalent motor input current be 138A, then annual power consumption is after speed governing：
Wb=power input to machines/frequency converter efficiency/liquid coupling maximum (top) speed is than * 8000
=8261687kWh
Then the energy saving ratio of Frequency Conversion Modification is about：
(11705548-8261687)/11705548=29%
0.56 yuan/degree is pressed such as the electricity charge to calculate, then annual saving expense is about：
3443861*0.56 1,600,000 yuan of ≈
With reference to above-mentioned energy-saving and frequency-variable benefit, the economic benefit of generation is 3.432 yuan/ton of steel (being free of tax).Since this is economical
Benefit is indirect economic effect, it is contemplated that the uncontrollable factor occurred in actual production process, therefore 80% is pressed to above-mentioned calculating
Calculate, the economic benefit of generation is 2.746 yuan/ton of steel (being free of tax).The direct cost produced after alloy baking use (does not include
Equipment investment expense) project produces capital cost after coming into operation be baking coal gas used and compressed air expense, compression
The cost of air is ignored, and the service condition of coal gas is：Consumption is 400Nm3 to coal gas per hour, and baking time is based on 15min
Calculate, then gas consumption is 15 60 × 400=100Nm3 of ÷, and the current 0.286 yuan/Nm3 of unit price of new district branch company coal gas (is free of
Tax), then the expense produced is for total economic benefit that 100 × 0.286 ÷ 150=0.19 yuan/ton steel produce：2.746-0.19+
0.8=3.356 members/t (are free of tax).
The synthesis lifting of converter alloy on-line heating combination energy-saving and frequency-variable makes steel total economic benefit that efficiency technology produces and is：
It is 3.356*2000000+1600000=8312000 first.
The alloy on-line heating device of the present invention is proved by production practices, Tapping Temperature of Bof is advantageously reduced, more has
It is obvious beneficial to the product quality for improving variety steel exploitation, related syndrome economic benefit.Formed in conjunction with energy-saving and frequency-variable technology complete
Property transform pattern, for improving energy-saving benefit, comprehensive lifting product quality has an epoch-marking significance.The steelmaking converter of the present invention
The method of alloy on-line heating device combination energy-saving and frequency-variable synthesis lifting steel-making efficiency, has expanded the think of of complexity reducing energy consumption
Road, improve reducing energy consumption field is related to face, reduces investment and the energy loss of personnel, improves the whole energy of enterprise
Effect, has achieveed the purpose that energy-saving.
Claims (10)
- A kind of 1. method of converter alloy on-line heating combination energy-saving and frequency-variable synthesis lifting steel-making efficiency, it is characterised in that including：Step 1, alloy on-line heating device is installed in converter platform position；Alloy on-line heating device includes feeding port, alloy Heating furnace and discharge port, using rotation laminar flow internal-mixing burner, the discharge port and charge door of alloying furnace in alloy heating furnace Not on a center line；Alloy material is directly entered alloy heating furnace by feeding port, is existed after being heated in stove by discharge port The alloy material after heating is directly put into converter before converter tapping；Step 2, to once dust collection of converter wind turbine, reducing energy consumption is carried out to motor using high voltage frequency conversion system, cancels original system liquid Mechanical couple control model, using converter inclining iron making signal as frequency conversion raising speed signal source, using converter inclining tapping signal as Frequency conversion speed-down signal source, realizes high voltage frequency conversion system Automatic Control.
- 2. according to the method described in claim 1, it is characterized in that, the alloy heating furnace, its furnace body are integrally cast, Furnace body wall thickness is more than 150mm, material Si4Mo.
- 3. according to the method described in claim 1, it is characterized in that, the feeding port be provided with can 360 degree of rotating chargings Protective cover.
- 4. according to the method described in claim 1, it is characterized in that, the rotation laminar flow internal-mixing burner is included along furnace body Surrounding is in the symmetrical multiple burners of tangent line.
- 5. according to the method described in claim 4, it is characterized in that, flow multiplier, combustion gas are provided with the burner Medium mixes under burner effect with combustion air, passes through the catalytic unit in burner, under the influence of catalyst, igniting Burning, then by flow multiplier, inside flow multiplier, by concussion under specific physics magnetic fields, by combustion gas Micel is broken up, diminishes.
- 6. according to the method described in claim 3, it is characterized in that, the charging protective cover, its upper part are once removed with converter Cloud of dust road is connected, and dedusting is controlled by high voltage frequency conversion system.
- 7. according to the method described in claim 1, it is characterized in that, the alloy on-line heating device, uses mechanical thing Expect detection device detection material, the front end material detection steel disc of mechanical material detection device is customized to the steel being sized Plate, and increase steel plate number, ensure that alloy material can be detected in different directions blanking process.
- 8. the method according to claim 1 or 7, it is characterised in that the alloy on-line heating device, its control system Small fire and big fire respectively using two kinds of heating modes, when detect have material in alloy heating furnace when, automatically by flame adjust to Big fire, into baking state, and is adjusted flame to small fire after the special time of setting, into keeping warm mode；When discharging or When detecting in stove without material, by automatic adjustment flame to small fire pattern.
- 9. according to the method described in claim 1, it is characterized in that, in the step 2, to mechanical system, electrical system, from Dynamicization system is transformed, and is specifically：(1) mechanical system is transformed, including：Stop solution oil circulating pump and cooling pump, remove whole circulating cooling system, remove fluid coupling；Motor is removed again；Motor base is handled, increases support base in stoste mechanical couple position, or re-start portion Pour, it is ensured that the load-bearing of motor base and stability before and after motor movement, install the groove for being adapted to motor to use on foundation of civil work Steel base, maintenance and replacement for later stage motor；After motor base possesses motor condition in place, motor is lifted to designated position, between motor and wind turbine, uses diaphragm Motor shaft and fan shaft are attached by shaft coupling, re-start that base is levelling and dynamic balance running after motor is in place, carry out two It is secondary to pour；After motor is in place, new dilute oil lubrication station is installed；(2) electric system transformation, including：Increase high voltage frequency conversion system is used to control primary dedusting wind turbine, is producing gap by electricity Machine reduction of speed is to standby dedusting frequency；(3) automated system is transformed, including：Using converter inclining iron making signal as frequency conversion raising speed signal source, converter inclining is gone out Steel signal realizes frequency conversion system Automatic Control as frequency conversion speed-down signal source.
- 10. the method according to claim 1 or 9, it is characterised in that the step 2 also adjusts high voltage frequency conversion system Transformer reference voltage, specifically will be adjusted to 10.5KV into line transformer primary side primary voltage tapping gear by 10KV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711194917.XA CN107974529A (en) | 2017-11-24 | 2017-11-24 | The method of converter alloy on-line heating combination energy-saving and frequency-variable synthesis lifting steel-making efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711194917.XA CN107974529A (en) | 2017-11-24 | 2017-11-24 | The method of converter alloy on-line heating combination energy-saving and frequency-variable synthesis lifting steel-making efficiency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107974529A true CN107974529A (en) | 2018-05-01 |
Family
ID=62011652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711194917.XA Pending CN107974529A (en) | 2017-11-24 | 2017-11-24 | The method of converter alloy on-line heating combination energy-saving and frequency-variable synthesis lifting steel-making efficiency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107974529A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108998624A (en) * | 2018-09-30 | 2018-12-14 | 四川德胜集团钒钛有限公司 | A kind of online alloy baking device of converter |
| CN109282656A (en) * | 2018-09-30 | 2019-01-29 | 四川德胜集团钒钛有限公司 | A kind of online baking method of steel-smelting alloy |
| CN109357540A (en) * | 2018-09-30 | 2019-02-19 | 四川德胜集团钒钛有限公司 | A kind of online baking control system of steel-smelting alloy |
| CN115438488A (en) * | 2022-09-06 | 2022-12-06 | 北京瑞晨航宇能源科技有限公司 | Heating furnace energy-saving benefit calculation method based on comprehensive ton steel combustion consumption |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201273765Y (en) * | 2008-09-02 | 2009-07-15 | 武汉钢铁(集团)公司 | Aluminum alloy baking stove |
| CN202116579U (en) * | 2011-05-11 | 2012-01-18 | 宣化钢铁集团有限责任公司 | Online iron alloy baking furnace used in converter |
| CN203908331U (en) * | 2014-06-06 | 2014-10-29 | 洛阳沃达机械技术开发有限公司 | Single-furnace-body on-line alloying furnace |
| CN205077089U (en) * | 2015-09-29 | 2016-03-09 | 北京首钢国际工程技术有限公司 | Ferroalloy toasts and feeding equipment on line for BOF steelmaking |
| CN205115520U (en) * | 2015-09-06 | 2016-03-30 | 中冶南方工程技术有限公司 | Online baking equipment of alloy and alloy toast charging system on line |
| CN106524761A (en) * | 2016-12-26 | 2017-03-22 | 河北煜剑节能技术有限公司 | Iron alloy heating furnace and iron alloy supply device |
-
2017
- 2017-11-24 CN CN201711194917.XA patent/CN107974529A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201273765Y (en) * | 2008-09-02 | 2009-07-15 | 武汉钢铁(集团)公司 | Aluminum alloy baking stove |
| CN202116579U (en) * | 2011-05-11 | 2012-01-18 | 宣化钢铁集团有限责任公司 | Online iron alloy baking furnace used in converter |
| CN203908331U (en) * | 2014-06-06 | 2014-10-29 | 洛阳沃达机械技术开发有限公司 | Single-furnace-body on-line alloying furnace |
| CN205115520U (en) * | 2015-09-06 | 2016-03-30 | 中冶南方工程技术有限公司 | Online baking equipment of alloy and alloy toast charging system on line |
| CN205077089U (en) * | 2015-09-29 | 2016-03-09 | 北京首钢国际工程技术有限公司 | Ferroalloy toasts and feeding equipment on line for BOF steelmaking |
| CN106524761A (en) * | 2016-12-26 | 2017-03-22 | 河北煜剑节能技术有限公司 | Iron alloy heating furnace and iron alloy supply device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108998624A (en) * | 2018-09-30 | 2018-12-14 | 四川德胜集团钒钛有限公司 | A kind of online alloy baking device of converter |
| CN109282656A (en) * | 2018-09-30 | 2019-01-29 | 四川德胜集团钒钛有限公司 | A kind of online baking method of steel-smelting alloy |
| CN109357540A (en) * | 2018-09-30 | 2019-02-19 | 四川德胜集团钒钛有限公司 | A kind of online baking control system of steel-smelting alloy |
| CN115438488A (en) * | 2022-09-06 | 2022-12-06 | 北京瑞晨航宇能源科技有限公司 | Heating furnace energy-saving benefit calculation method based on comprehensive ton steel combustion consumption |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107974529A (en) | The method of converter alloy on-line heating combination energy-saving and frequency-variable synthesis lifting steel-making efficiency | |
| CN201787807U (en) | Vertical high-efficiency energy-saving copper melting furnace with premixing combustion system | |
| CN110923394B (en) | Steelmaking apparatus and steelmaking method | |
| CN205115520U (en) | Online baking equipment of alloy and alloy toast charging system on line | |
| CN102806344A (en) | Oxygen-enriched ladle baking device by using low calorific value blast furnace coal gas | |
| WO2021088710A1 (en) | Crude copper refining apparatus and refining method | |
| CN109321699A (en) | A kind of method of the blast furnace stockline dropping blowing out not residual iron placing burn-up dead coke heap of tuyere area | |
| CN109182644A (en) | Alloy material baking furnace system and operating method after a kind of rotation cloth converter | |
| CN111518986A (en) | System for smelting scrap steel by utilizing primary combustion heat energy and steelmaking method thereof | |
| CN102010919B (en) | Process for blasting oxygen-enriched hot blast to blast furnace and device applied to same | |
| WO2019201182A1 (en) | Cupola furnace employing plasma to perform melting process, and iron melting method thereof | |
| CN106399625A (en) | High-temperature and high-pressure gas sealing device for steel ladle refining furnace and application method of high-temperature and high-pressure gas sealing device | |
| CN203980868U (en) | A kind of hot blast oxygen rich fuel gas energy-conserving and environment-protective melting shaft furnace | |
| CN101576737A (en) | Electric arc furnace energy-saving control method and system | |
| CN212713622U (en) | System for smelting scrap steel by utilizing once-combustion heat energy | |
| CN107153927A (en) | A kind of steel produces management method of delaying work | |
| CN112280927A (en) | Operation method for baking scrap steel in converter | |
| CN102211181A (en) | Steel ladle baking device | |
| CN216107053U (en) | One-time combustion auxiliary heating electric arc furnace steelmaking equipment | |
| CN111913452B (en) | Automatic tundish baking system and method based on production rhythm control | |
| CN102735053B (en) | LF (low frequency) furnace device, and method for processing molten iron of blast furnace | |
| CN113667791A (en) | Heat preservation method for metallurgical converter | |
| CN217809531U (en) | Online baking and feeding device for steel ladle refining furnace waste steel | |
| CN207778997U (en) | A kind of online, efficient alloy baking device | |
| CN202452830U (en) | Rapid smelting intermediate frequency furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180501 |