CN102564107A - Energy saving system of submerged arc furnace - Google Patents
Energy saving system of submerged arc furnace Download PDFInfo
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- CN102564107A CN102564107A CN2011100507883A CN201110050788A CN102564107A CN 102564107 A CN102564107 A CN 102564107A CN 2011100507883 A CN2011100507883 A CN 2011100507883A CN 201110050788 A CN201110050788 A CN 201110050788A CN 102564107 A CN102564107 A CN 102564107A
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Abstract
The invention provides an energy saving system of a submerged arc furnace, which comprises a smoke helmet, a smoke outlet pipeline, a three-phase electrode device of the smoke helmet, a power supply system transformer and short-network combined electrode furnace tubes compounded with water-cooled cables. The smoke helmet is arranged above a furnace body, the through smoke outlet pipeline penetrates through the smoke helmet, the power supply system transformer is connected with the electrode device, the electrode device consists of an electrode holding portion and electrode group, each electrode group includes three or more electrodes, a plurality of small electrodes are mounted in an electrode shell of the electrode holding portion, and combined water-cooled slip clamps an electrode shell device to form a short-network single-phase electrode. Shortcomings of over high electricity consumption and high expenses of a traditional electric arc furnace are overcome. Compared with the traditional electric arc furnace, the energy-saving system of the submerged arc furnace has the advantages of low electricity consumption, high production efficiency, stability and reliability in work and capability of greatly reducing production cost.
Description
Technical field
The present invention relates to a kind of electric smelting furnace, relate in particular to the energy conserving system of the ore deposit thermic arc stove of industrial silicon production.
Background technology
Electric arc furnaces (electric reduction furnace) also claims the ore deposit hot stove, and ore deposit thermic arc stove can be divided into nonferrous smelting, black smelting, ferroalloy smelting etc.The special-purpose interchange of ferroalloy smelting electric reduction furnace is the resistance electric arc furnaces, and it is mainly used in reducing and smelting ore, furnace charges such as carbonaceous reductant and solvent.Its production characteristics are often to adopt carbonaceous (or magnesia) refractory material to do furnace lining, use self-baking electrode, and electrode inserts in the furnace charge and carries out arc-covering slag operation, and are reinforced successively, the batch (-type) discharging, slag tap continued operation.
Ore deposit thermic arc stove is widely used in metallurgical industry, and in chemical industry and the abrasive industry, the principal item of smelting has: ferrosilicon, industrial silicon, calcium-silicon, high carbon ferromanganese, manganeisen, high carbon ferro-chrome, silicochromium and rare earth alloy etc.Be used to smelt products such as the pig iron, calcium carbide, yellow phosphorus, nickel ice and corundum in addition.
Ore deposit thermic arc stove is smelted moment and is emitted a large amount of heat and high-temperature smoke because the smelting process time is short, and reaction is violent, and flame is high, produces a large amount of heats, and temperature also consumes a large amount of electric energy simultaneously up to more than 700 ℃.
Ore deposit thermic arc stove smelting process is to bear the task of smelting under the high temperature, is the physicochemical change process of a high temperature.The quality of production kind and quality, the height of electric energy and material consumption, the quality of technology and economic indicator, the proper operation of smelting in not only being decided by raw materials quality and producing also is decided by integral device, electric parameter, the correct selection of technological parameter simultaneously.Very important with design to dedicated transformer through short net, the box-like electrode of combined group, the furnace shell efficient of transmission of electric energy and conversion in stove.
Summary of the invention
The present invention is intended to the thermic arc stove power consumption of traditional ore deposit excessive, and the above-mentioned defective that production cost is higher provides a kind of ore deposit thermic arc stove energy conserving system; Adopt the more traditional ore deposit of thermic arc stove, the ore deposit thermic arc stove power consumption of native system little; Production efficiency is high, and working stability is reliable, reduces production costs greatly.Also solved simultaneously petticoat pipe and tapping hole diffusing fume emission on every side.
In order to realize the object of the invention; A kind of ore deposit thermic arc stove energy conserving system is proposed; This system comprises body of heater, arch petticoat pipe, smoke pipeline, charging system and electrode assembly; Said arch petticoat pipe is arranged on the body of heater top, and electrode assembly passes the arch petticoat pipe and inserts in the body of heater, and said electrode assembly is made up of electrode group, electrode lifting mechanism, hydraulic system, electrode clamping part and weak point net system; It is one group with top electrode that described electrode group is 3 or 3,3 groups or 3 groups of composite combined electrodes that above electrode group constitutes; Electrode lifting mechanism is arranged on electrode group top; Each electrode group outer cover electrode shell; Said electrode assembly links to each other with electrical equipment through the electrode clamping part, and said electrical equipment comprises rectifier transformer, short net, rectifier cabinet, high-low-voltage electrical equipment and electric-control system.
Said body of heater is made up of steel furnace shell and refractory material lining-up, and body of heater is provided with the body of heater rotating mechanism, and rotary body of heater can burn 360 ° of rotations of vertical axis do or back and forth rotate by the hexagonal angle degree, and said body of heater is circle, rectangle or flat ellipse.
Said arch petticoat pipe is made up of electrode hole, tremie pipe, fire door, cooling water pipe, and said arch petticoat pipe is used the nonmagnetic substance insulation against ground for the hollow structure that cools off water layer that has of insulation, composite material.
Said charging system is made up of feed bin, batcher, tremie pipe, intermittence or continuous supply furnace charge in stove.
Each group electrode of said composite combined electrode comprises the cylindrical electrode shell, adorns three or many root graphite electrodes or carbon pole in the tube, adds electrode paste around the said electrode; The cylinder that said electrode shell adopts sheet metal to process, cylinder is added with the muscle sheet outward, and said electrode shell upper and lower opening is pressed the diameter alignment, and the muscle sheet of last lower casing becomes a vertical line.
The graphite electrode that is equipped with in the drum diameter of the electrode shell of said composite combined electrode and the cylinder or the radical of carbon pole are different and the electrode material conductance is different is provided with according to the matallurgical products kind; The said drum diameter of smelting commercial silicon is φ 1250cm, transformer capacity 25500KWA electric furnace; Three of the graphite electrodes or the diameter that in the tube φ 280～460 are housed are φ 1250cm, and three of the carbon poles of φ 400～550 are housed in the said cylinder; The said drum diameter of smelting commercial silicon is that φ 1360cm transformer capacity is the 33000KWA electric furnace, and four of graphite electrodes or diameter that φ 300～500 is housed in the tube are φ 1360cm, and the carbon pole that φ 400～600 is housed in the said cylinder is more than four; The said drum diameter of smelting calcium carbide is 1250cm, be equipped with in the tube φ 280～460 graphite electrodes more than three or diameter be φ 1250cm, transformer capacity is φ 400～550 carbon poles to be housed more than four in the 25500KWA electric furnace tube.
Said electrode lifting mechanism comprises upper gasbag band-type brake, lower gasbag band-type brake, upper mounting plate, lower platform and oil cylinder, and wherein, last lower gasbag band-type brake is separately fixed on the lower platform, and said upper and lower platform respectively has 3 rise fall of electrodes oil cylinders.
Said short net system adopts the parts that reach following specification: water-cooled copper 2～4A/mm
2, water-cooled cable 3～5A/mm
2, composite combined electrode 6～12A/cm
2, composite combined electrode and composite combined device contact area electric current 2～9A/cm
2, the short net system that forms of bus-bar formula two wiring collector ring made from conduction water flowing copper pipe and hybrid combining water-cooled watt clamping electrode housing apparatus single-phase electrode, inductance and reactance in the reduction conductor.
Institute's electrode clamping part is a composite combined electrode holde system, said system by non magnetic pressure rings, combination contact device, water-cooled bus copper pipe, cooling water concetrated pipe, blower fan, sliding put device, copper cover suspend pipe, found cylinder, spiral spring, contact device, electrode shell, electrode shell muscle sheet, water-cooled watt, the big cover of water-cooled, clamp, oil cylinder is formed.
According to the said structure characteristics, a kind of concrete scheme of thought the object of the invention is proposed, the furnace shell diameter of the body of heater that ore deposit thermic arc stove energy conserving system adopts is 9.2m～10.8m, highly is 5.2m～6.8m; Capacity is the electric arc furnaces of 25500KVA, and said transformer type selecting is the complete permanent power transformer of 3 individual event * 8500KVA, and output current is 67460A during the work deep low gear; The individual event electrode diameter of said composite combined electrodes use is φ 1250cm; Electrode shell adopts black sheet metal or Thin Stainless Steel steel plate to process; Said electrode shell cylinder adds 12 muscle sheets; Adorn 3 260cm～500cm graphite electrode and electrode paste in the said electrode shell, electrode centers is apart between 2.8m～3.6m.
Ore deposit of the present invention thermic arc stove is fit to be used in medium-sized, large-scale arc furnace equipment.Its rectifier transformer is the complete permanent power of output current when the minimum secondary voltage of work; Weak point net system adopts big electric current, and depressor is the complete permanent power of output current when the minimum secondary voltage of work; Weak point net system adopts big electric current, the low voltage operating conductor.Electrodes use composite combined electrode is directly sent into electric energy in melting pond, the crucible district, helps adjusting composite combined electrode insertion depth, and the long-time running operation is stablized in guarantee stove ore deposit.The energy conserving system of ore deposit of the present invention thermic arc stove, little than the power consumption of conventional arc stove, production efficiency is high, and working stability is reliable, practices thrift the consumption of ton unit consumption greatly, reduces the production run cost, saves energy and reduce the cost, changes environmental protection, advances scientific and technological progress and innovation and development.
Description of drawings
Fig. 1 is an ore deposit of the present invention thermic arc stove energy conserving system overall structure sketch map;
Fig. 2 is three groups of combination of electrodes structural representations of ore deposit thermic arc stove;
Fig. 3 is one group of electricity level structure sketch map;
Fig. 4 and Fig. 5 are ore deposit thermic arc stove electrode lifting mechanism sketch mapes;
Fig. 6 is an electrode holde system architecture sketch map.
| 1 body of |
14 |
| 2 |
15 |
| 3 |
16 |
| 4 electrode assemblies | 17 |
| 5 |
18 |
| 6 |
19 |
| 7 rise fall of |
20 |
| 8 upper gasbag band-type brakes | Copper pipe in 21 |
| 9 lower gasbag band- |
22 |
| 10 cooling water concetrated pipes | 23 electrode shell muscle sheets |
| The 11 sliding devices of putting | 24 |
| 12 carrying |
25 |
| 13 water-cooled |
26 blower fans |
The specific embodiment
For making the object of the invention, technical scheme and advantage clearer, below in conjunction with specific embodiment and conjunction with figs., to further explain of the present invention.
Fig. 1 is an ore deposit of the present invention thermic arc stove energy conserving system overall structure sketch map, and as shown in the figure, this system comprises body of heater 1, arch petticoat pipe 2, smoke pipeline 15, charging system and electrode assembly 4.Wherein, arch petticoat pipe 2 is arranged on body of heater 1 top, is supported by column 16, and electrode assembly 4 passes petticoat pipe 2 and inserts in the body of heater 1; Electrode assembly 4 is made up of electrode group, electrode lifting mechanism, hydraulic system, electrode clamping part and short net system, and described electrode group is to be one group composite combined electrode more than three and three; Electrode lifting mechanism is arranged on electrode group top, electrode group outer cover electrode shell.Electrode assembly 4 links to each other with electrical equipment through the electrode clamping part, and electrical equipment comprises rectifier transformer, short net, rectifier cabinet, high-low-voltage electrical equipment and electric-control system etc.
Wherein, body of heater 1 is provided with the body of heater rotating mechanism, and arch petticoat pipe 2 is set on the bell, and tremie pipe 3, floss hole 15 and composite combined electrode insert mouth; Body of heater 1 is made up of steel furnace shell and refractory material lining-up; The shape of body of heater is to confirm that according to the configuring condition of electrode be generally circle, rectangle or flat ellipse several types, the best is circular body of heater; Its advantage is a compact conformation, and big-and-middle-sized electric furnace furnace shell generally uses circular body of heater.Rotary body of heater can be done 360 ° of rotations around vertical axis, or back and forth rotates by the hexagonal angle degree, and this structure helps loosening furnace charge, increases gas permeability, enlarges pincers pot district, reduces and smashes furnace operating, prolongs furnace lining service life.
Said arch petticoat pipe 2 is made up of electrode hole, tremie pipe, fire door, cooling water pipe etc.Petticoat pipe is the device that captures and derive flue gas, with nonmagnetic substance insulation against ground and insulation, composite material structure.Petticoat pipe has the hollow structure that cools off water layer, forms the water-cooled eddy current, can play the effect of high temperature resistant, anti-magnetic hysteresis loss and anti-magnetic radiation.
Said charging system be intermittently or continuous in electric furnace the device of supply furnace charge.It is made up of feed bin, batcher, tremie pipe etc.To the mode of furnace charge usually along with the size technology equipment of furnace volume is decided with smelting the different of kind.
Fig. 2 is three groups of combination of electrodes structural representations of ore deposit thermic arc stove, and Fig. 3 is one group of electricity level structure sketch map; As shown in the figure, the present invention adopts three to be one group, totally 3 groups composite combined electrode; Each group electrode of composite combined electrode comprises cylindrical electrode shell 22, adorns three or many root graphite electrodes or carbon pole 19 in the tube, adds special-purpose special electrode paste around the electrode 19; Electrode paste adds in the electrode container, changes, changed the size of electric arc according to material layer temperature in the stove, and temperature is high more in the bed of material, and electric arc is long more, and conductive capability is strong more.Electric arc is elongated, just can reduce the acting of electric energy at charge level, reduces the pressure drop of short net, improves effective voltage, improves molten bath power.
The contrast of said special electrode paste and other electrodes sees the following form:
The cylinder that electrode shell 22 adopts sheet metal (black steel sheet or corrosion resistant plate) to process, cylinder is added with muscle sheet 23 outward.It is fixed that drum diameter comes according to the size of electric arc furnaces, and the quantity of muscle sheet 23 is to formulate according to drum diameter.Through muscle sheet conduction, the thickness of muscle sheet 23 mechanical strength of mechanical strength during that also increase electrode shell 22 (or electrode 19) simultaneously with shelling.Electrode shell 22 upper and lower openings are pressed diameter alignment welding, and last lower casing is vertical with muscle sheet 23 being aligneds, can better conduct electricity, and are convenient to conductive clip simultaneously and clamp, and better press electrode shell 22.
Electrode diameter is to design according to the furnace transformer calculation of capacity: the type of furnace is big, and the outer reinforcement sheet of the electrode shell radical that also changes increases, and diameter is also big with regard to the phase strain.The type of furnace is little, and the outer reinforcement sheet of the electrode shell radical that also changes reduces, and the electrode design diameter also diminishes with regard to corresponding.
This ore deposit thermic arc stove can be divided into circular electric furnace that three-phase six electrodes arrange by equilateral triangle and the three-phase six electrodes rectangular electric furnace by the capable arrangement of " one " word by number of electrodes magnitude arrangement form.The main hot conduction mechanism of composite combined electrode is directly, stable unidirectional convection current, and in the conduction of material loading surface layer, the electric arc in the melting pincers pot is more superior again than conventional electrodes in smelting process in this heat conduction, helps adjusting the slotting deeply degree of depth of electrode.
Through controlling the device bottom; Electrode container and muscle sheet make composite combined device contact composite combined electrode; Furnace bottom arcing convection current is conducted electricity; Guaranteed that composite combined electrode that arc and electrode insertion depth in pincers pots pond carry out arcing convection current conduction in heat conducting optimum position always, improved stove internal power factor, the reducing agent in the crucible is speeded up.
Radical according to graphite electrode that is equipped with in matallurgical products kind difference, electrode material conductance difference, the composite combined electrode container or carbon pole is also inequality.Electrode container diameter like smelting commercial silicon is φ 1250cm; Three of the graphite electrodes (diameter is three of the carbon poles that φ 400～550 is housed in the φ 1250cm electrode container) of φ 280～460 are housed in the tube; The electrode container diameter of smelting commercial silicon is φ 1360cm, and three of the graphite electrodes (diameter is four of the carbon poles that φ 400～600 is housed in the φ 1360cm electrode container) of φ 300～500 are housed in the electrode container; As the electrode container diameter of smelting calcium carbide is 1250cm, φ 280～460 graphite electrodes is housed more than two in the electrode container; (diameter is φ 400～550 carbon poles to be housed more than three in the φ 1250cm electrode container)
Electrode performance coefficient such as following table:
Fig. 4 and Fig. 5 are ore deposit thermic arc stove electrode electrode lifting mechanism sketch mapes; Ore deposit thermic arc stove has 3 phase electrodes, requires the pressing of every electrode can single movement.The composite combined electrode is every adorns three or many electrodes in mutually; Upper gasbag band-type brake 8 is housed on it, 9,3 upper gasbag band-type brakes 8 of lower gasbag band-type brake are fixed on the upper mounting plate, 3 lower gasbag band-type brakes are fixed on the lower platform; Upper and lower platform respectively has 3 rise fall of electrodes oil cylinders 7; (the hydraulic cylinder total kilometres are 30-300mm), the control platform rises, descends, and technological process is following:
The hot stove in this ore deposit have 3 phase composite combined electrodes (electrode by utmost point shell, single-phase in three or many root graphite electrodes or carbon pole, the electrode paste of dress form), requiring every composite combined electrode to press can single movement.Single-phase composite combined electrode shell has 6 hydraulic clamping cylinder controls, and 6 hydraulic clamping cylinders are respectively unit 1～6, only allows 1 unit action when each release, rising; After 6 whole risings in unit finish; Unit 1～6 moves respectively during decline, once presses to finish, and presses according to hydraulic cylinder travel at every turn; If press normally, the composite combined electrode shell amount of pressing is 20mm.
The band shell presses the individual event electrode and once presses the action sketch map.
. the electrode shelling presses process description
The hot stove in ore deposit has 3 phase electrodes, and requiring every composite combined electrode to press can single movement.Three or many root graphite electrodes or carbon pole of dress in having in the single-phase composite combined electrode; On every interior mutually three of adorning or many root graphite electrodes or the carbon pole upper and lower air bag is housed and digs lock, 3 upper gasbags of single-phase electrode dig lock and are fixed on the upper mounting plate, and 3 lower gasbags dig locks and are fixed on the lower platform; Upper and lower platform respectively has 3 hydraulic cylinders; (total kilometres are 30-300mm), the control platform rises, descends, and technological process is following:
6 upper and lower air bags of single-phase composite combined electrode dig locks and all are in clamped condition during normal halted state.Press press 3 upper gasbags of button → single-phase composite combined electrode dig lock and unclamp → 3 hydraulic cylinders on the upper mounting plate move simultaneously; Control upper mounting plate and 3 upper gasbags stop after digging lock rising 15mm → and 3 upper gasbags of single-phase composite combined electrode dig 3 lower gasbags of lock clampings → single-phase composite combined electrode and dig lock and unclamp → 3 hydraulic cylinders on the upper mounting plate move simultaneously, stop after control upper mounting plate and 3 upper gasbags dig lock (drive electrode) decline 15mm → 3 lower gasbags of single-phase composite combined electrode dig lock clampings → single-phase composite combined electrode and once press and move completion.
The hydraulic system of native system is the composite combined rise fall of electrodes, presses and control the power source of device etc.This system is made up of oil pump station, valve station, accumulator group and connecting line, and this hydraulic means ensures normal safety, reliable, and operation ratio is high.
The ore deposit thermic arc stove water cooling system of native system is to being in the device that the structure of working under the hot conditions cools off, circulates and insulate, the normal safety of support equipment, reliable and economic operation.
The transformer of native system is less because of no-load condition in the smelting process, so except selecting the low-loss silicon steel sheet for use, the more important thing is the load loss that reduces transformer.The arc furnace transformer parameter has adopted complete permanent power, both when the minimum secondary voltage of transformer, has guaranteed total power output, and is bigger more than 30% than the output current ability of conventional design transformer.
According to the design feature and the work characteristics of ore deposit thermic arc stove, 70% of system reactance is produced by short net system, and short net is the system of a big current work.To skin effect coefficient, the approach effect coefficient all will comprehensively increase resistance and force the calculating of weak its induction reactance of magnetic field cancellation between conductor when the short net of design; The calculating of the inductance of degaussing field mutually; Strengthen the calculating of the insulator between the both positive and negative polarity; Strengthen the calculating of the high temperature compensate function of cooling electric conductor; Strengthen the exemplary configurations calculation Design of short net.
As calculating according to the long-pending current density of conductor section; Contact tube 2～4A/mm
2, water-cooled cable 3～5A/mm
2, composite combined electrode 6～12A/cm
2Composite combined electrode and composite combined device contact area electric current 2～9A/cm
2
Generally speaking in order to solve the low problem of power factor of ore furnace; China is employed at present the method that high-pressure side carries out reactive-load compensation more and solves; High pressure compensation only is to have improved on high-tension side power factor, but owing to the huge reactive power that induction reactance produced of low-pressure end weak point net system still flows in weak point net system, the strong phase of netting owing to weak point simultaneously is (so the less loss of weak point event induction reactance is less for short net; Output is than the strong phase of die name) with the weak three-phase imbalance that causes mutually; Power causes system loss to increase in alternate transfer, and metallurgical effect reduces, and traditional high press fit three-phase compensation can not solve the problem of three-phase equilibrium; Do not reach the effect that weak point net system is idle, improve the low-pressure end power factor of offsetting yet; Because the induction reactance of short net accounts for more than 70% of whole system induction reactance, so can not reduce the loss of low-pressure end, can not increase exerting oneself of transformer.
The present invention improves short net and adopts conduction water flowing copper pipe and the cold cable of water flowing soft water; The two wiring of bus-bar formula collector rings with the making of conduction water flowing copper pipe; Add hybrid combining water-cooled watt clamping electrode housing apparatus, the short net single-phase electrode of composition reduces inductance and reactance in the conductor; Changed the two wiring of bus-bar formula collector ring, changed clamping device and shelling electrode assembly with the brasses combined holder.
Fig. 6 is an electrode holde system architecture sketch map.Because electrode of the present invention is with continuous composite combined self-baking formula; It is filled with electrode paste and forms by three or many root graphite electrodes (or many carbon poles) are housed in composite combined electrode shell and the shell; Electrode holde of the present invention system is a composite combined electrode holde system, and this system is made up of copper pipe 21 in carrying cylinder 12, non magnetic pressure bottom part ring 20, water-cooled cable 13, contact tube 14, the stove, blower fan 26, the sliding device 11, contact device 17, electrode shell 22, electrode shell muscle sheet 23, oil cylinder 6 put.
Composite combined is controlled the advantage of device:
1. simple in structure, it has been simplified and has controlled device and laying mechanism, use reliable, high efficiency.
2. contact device and the sliding device of putting are applicable to the self-baking of various different-diameters and graphite, carbon pole; Also solved simultaneously the large electrode problem of medium-and-large-sized electric furnace.
3. or else electrode shell can be out of shape, and also can shell to use to reduce the production run cost.
4. electrode or else can be out of hand when sliding putting, and puts rate for the smelting process of high power consumption has increased the safety electrode cunning.
5. owing to lower the cooling of electrode, thereby the electrode baking position is raise.
6. reduced electrode breakdown accident.
When the present invention exchanges electric reduction furnace in design, major technique technology and parameter are selected to calculate as follows:
Furnace depth H (cm)=β d (3)
Furnace diameter D
2(cm)=γ d (4)
Select furnace volume (transformer rated capacity) according to smelting kind and scale thereof, confirm the technology geometric parameter of electric furnace, like electrode diameter, electrode utmost point core diameter (or electrode centers square) furnace shell diameter and height, the furnace diameter and the degree of depth etc.
The electric reduction furnace designed capacity adopts following formula to calculate the big ting model of stove:
Q-electric furnace output t/a in the formula; Ton/year
The 24-electric furnace 24h that works continuously every day; 24/ hour
T-electric furnace work calendar fate d/a; My god/year
P-furnace transformer rated capacity KVA; Kilovolt/peace
Cos φ-electric furnace natural power factor looks the furnace volume size and different, and capacity is big more, and its value is just more little, is generally 0.65～0.95%;
K
1-mains fluctuations coefficient is generally 0.95～1.0%;
K
2-furnace transformer power efficiency is generally 0.95～1.0%;
K
3-electric furnace activity duration usage factor is generally 0.95～0.98%;
W-product melting electric consumption, KWh/t.
According to the aforementioned calculation mode; Confirm the parameters of native system; As confirming the 25500KVA electric furnace; The transformer type selecting is 3 individual event * 8500KVA, (complete permanent power transformer, output current is 67460A when complete permanent power transformer work deep low gear), and electrode diameter is the composite combined electrode (in adorn 3 above 260cm～380cm graphite electrodes fixedly press device and electrode paste) of individual event φ 1250cm.Electrode diameter increases the minimizing diameter according to type of furnace size and transformer capacity size.The furnace shell diameter, the furnace shell height, electrode circle diameter comes sizing according to transformer capacity.Electrode shell is the composite combined electrode shell, and the cylinder that adopts sheet metal (black steel sheet and stainless-steel sheet) to process adds 12 muscle sheets (the muscle sheet is according to type of furnace size, and transformer capacity increases and reduce the muscle sheet).Electrode electrode circle diameter or electrode centers be apart from be between 2.8m～3.6m, and the furnace shell diameter is 9.2m～10.8m, highly is 5.2m～6.8m.
Technical scheme of the present invention is for smelting kind unit consumption, energy-conservation, economize on electricity 20～30% degree/tons of the product of ton consumption more than 10000 degree; Smelt kind unit consumption, energy-conservation, economize on electricity 10～26% degree/tons of the product of ton consumption below 10000 degree;
Smelt kind unit consumption, ton consumption carbonaceous reducing agent, product ton consumption saving 6～12%/ton;
Smelt kind unit consumption, ton consumption ore, product ton consumption saving 8～16%/ton;
Smelt kind unit consumption, ton consumption composite combined electrode, product ton pin consumption and practice thrift cost more than 300～1600 yuan/ton; (calculating) according to type of furnace size
Carbon dioxide, a small amount of 8～30%/ton of exhaust gas dust discharge capacity product ton depletion;
Though the present invention with preferred embodiment openly as above, they are not to be used for limiting the present invention, and the content that protection scope of the present invention should be defined with the application's claim protection domain is as the criterion.Anyly have the knack of present technique field person, do not breaking away from the spirit and scope of the present invention, various variations of being done or be equal to replacement all should belong to protection scope of the present invention.
Claims (8)
1. ore deposit thermic arc stove energy conserving system; This system comprises body of heater, arch petticoat pipe, smoke pipeline, charging system and controls system's electrode and lifting device; Transformer and short net etc., said arch petticoat pipe are arranged on the body of heater top, and electrode and lifting device pass the arch petticoat pipe and insert in the body of heater; It is characterized in that; Said electrode assembly is made up of composite combined electrode, electrode lifting mechanism, hydraulic system, the short net of electrode holder transformer electric power system, and described electrode group is every to be that 3 phases or 3 are one group with top electrode mutually, 3 groups or 3 groups of composite combined electrodes that above electrode group constitutes; Electrode lifting mechanism is arranged on electrode group top; Each electrode group outside electrode shell; Said electrode assembly links to each other with electrical equipment through the electrode clamping part, and said electrical equipment comprises rectifier transformer, short net, rectifier cabinet, high-low-voltage electrical equipment and electric-control system.
2. ore deposit according to claim 1 thermic arc stove energy conserving system; It is characterized in that; Said body of heater is made up of steel furnace shell and refractory material lining-up; Body of heater is provided with the body of heater rotating mechanism, and rotary body of heater can burn 360 ° of rotations of vertical axis do or back and forth rotate by the hexagonal angle degree, and said body of heater is circle, rectangle or flat ellipse;
Said arch petticoat pipe is made up of electrode hole, tremie pipe, fire door, cooling water pipe, smoke exhaust pipe, and said arch petticoat pipe is used the nonmagnetic substance insulation against ground for the hollow structure that cools off water layer that has of insulation, composite material;
Said charging system is made up of feed bin, batcher, tremie pipe, intermittence or continuous supply furnace charge in stove.
3. ore deposit according to claim 1 thermic arc stove energy conserving system is characterized in that, each group electrode of said composite combined electrode comprises the cylindrical electrode shell, adorns three or many root graphite electrodes or carbon pole in the tube, adds special electrode paste around the said electrode; The cylinder that said electrode shell adopts sheet metal to process, cylinder is added with the muscle sheet outward, and said electrode shell upper and lower opening is pressed the diameter alignment, and the muscle sheet of last lower casing becomes a vertical line.
4. ore deposit according to claim 1 thermic arc stove energy conserving system; It is characterized in that; The graphite electrode that is equipped with in the drum diameter of the electrode shell of said composite combined electrode and the cylinder or the radical of carbon pole are different and the electrode material conductance is different is provided with according to the matallurgical products kind, and the drum diameter of smelting commercial silicon is φ 1250cm; The graphite electrode that in the tube φ 280～460 is housed more than three or diameter be φ 1250cm, the carbon pole that φ 400～550 is housed in the said cylinder is more than three; The drum diameter of smelting commercial silicon is φ 1360cm, the graphite electrode that in the tube φ 300～500 is housed more than three or diameter be φ 1360cm, the carbon pole that φ 400～600 is housed in the said cylinder is more than three; The said drum diameter of smelting calcium carbide is 1250cm, be equipped with in the tube φ 280～460 graphite electrodes more than three or diameter be φ 1250cm, φ 400～550 carbon poles are housed more than four and four in the said cylinder.
5. ore deposit according to claim 1 thermic arc stove energy conserving system; It is characterized in that; Said electrode lifting mechanism comprises upper gasbag band-type brake, lower gasbag band-type brake, upper mounting plate, lower platform and oil cylinder; Wherein, last lower gasbag band-type brake is separately fixed on the lower platform, and said upper and lower platform respectively has 3 rise fall of electrodes oil cylinders.
6. ore deposit according to claim 1 thermic arc stove energy conserving system is characterized in that, said short net system adopts the parts that reach following specification: water-cooled copper 2～4A/mm
2, water-cooled cable 3～5A/mm
2, composite combined electrode 6～12A/cm
2, composite combined electrode and composite combined device contact area electric current 2～9A/cm
2, the short net system that forms of bus-bar formula two wiring collector ring made from conduction water flowing copper pipe and hybrid combining water-cooled watt clamping electrode housing apparatus single-phase electrode, inductance and reactance in the reduction conductor.
7. ore deposit according to claim 1 thermic arc stove energy conserving system; It is characterized in that; Described electrode clamping part is a composite combined electrode holde system, said system by this system by copper pipe in carrying cylinder, non magnetic and composite material pressure bottom part ring, water-cooled cable, contact tube, the stove, blower fan, slidingly put device, contact device, electrode shell, electrode shell muscle sheet and oil cylinder and form.
8. according to the described ore deposit of claim 1-7 thermic arc stove energy conserving system, it is characterized in that the furnace shell diameter of said body of heater is 9.2m～10.8m, highly for 5.2m～6.8m; Capacity is the electric arc furnaces of 25500KVA, and said transformer type selecting is the complete permanent power transformer of 3 individual event * 8500KVA, and output current is 67460A during the work deep low gear; The individual event electrode diameter of said composite combined electrodes use is φ 1250cm; Electrode shell adopts black sheet metal or Thin Stainless Steel steel plate to process; Said electrode shell cylinder adds 12 muscle sheets; Adorn 3 260cm～380cm graphite electrode and electrode paste in the said electrode shell, electrode centers is apart between 2.8m～3.6m.
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| CN2011100507883A CN102564107A (en) | 2010-12-30 | 2011-03-03 | Energy saving system of submerged arc furnace |
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| CN105282891A (en) * | 2014-07-11 | 2016-01-27 | 鞍钢股份有限公司 | Method for preventing graphite electrode of LF furnace from being broken or released |
| CN108571890A (en) * | 2018-04-18 | 2018-09-25 | 重庆市赛特刚玉有限公司 | Self-baking electrode topples over furnace structure for Brown Alundum |
| CN109439901A (en) * | 2018-11-20 | 2019-03-08 | 宁夏贺兰山冶金有限公司 | High silicon silicozirconium smelting system |
| CN110081704A (en) * | 2019-06-13 | 2019-08-02 | 大连重工机电设备成套有限公司 | Semi-hermetic is without fixed anode DC-ore-heating furnace |
| CN112781391A (en) * | 2021-02-05 | 2021-05-11 | 牛蓉 | Electric furnace electrode control system |
| CN115307445A (en) * | 2022-08-02 | 2022-11-08 | 宁夏中卫市银河冶炼有限公司 | Submerged arc furnace smelting short network system and energy-saving submerged arc furnace smelting device |
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| CN112781391A (en) * | 2021-02-05 | 2021-05-11 | 牛蓉 | Electric furnace electrode control system |
| CN115307445A (en) * | 2022-08-02 | 2022-11-08 | 宁夏中卫市银河冶炼有限公司 | Submerged arc furnace smelting short network system and energy-saving submerged arc furnace smelting device |
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Application publication date: 20120711 |