CN202153094U - Novel smelting electric arc furnace for fused magnesium oxide - Google Patents

Novel smelting electric arc furnace for fused magnesium oxide Download PDF

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Publication number
CN202153094U
CN202153094U CN2011201883992U CN201120188399U CN202153094U CN 202153094 U CN202153094 U CN 202153094U CN 2011201883992 U CN2011201883992 U CN 2011201883992U CN 201120188399 U CN201120188399 U CN 201120188399U CN 202153094 U CN202153094 U CN 202153094U
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China
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furnace
electrode
bell
arc furnace
smelting
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Expired - Lifetime
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CN2011201883992U
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Chinese (zh)
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张科奇
郭云奇
齐国超
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Zhang Keqi
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BAOJI KAIFENG TECHNOLOGY DEVELOPMENT CO LTD
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Abstract

Provided is a novel smelting electric arc furnace for fused magnesium oxide. The novel smelting electric arc furnace for the fused magnesium oxide comprises a high-voltage cabinet, a transformer, a low-voltage cabinet, a programmable logic controller (PLC) operation table, a short network, a water cooled cable, an electrode lifting device and a graphite electrode, wherein the graphite electrode is arranged in a smelting furnace installed under an operation platform. The smelting furnace comprises a furnace drum, a furnace body and a furnace lid, wherein the bottom of the furnace drum is arranged on the horizontal foundation ground, and the top of the furnace drum is connected with the operation platform. The furnace body is arranged on a trolley and located in the middle of the furnace drum, and the trolley is arranged a rotating platform installed below the horizontal foundation ground. The furnace lid is arranged on the operation platform and covers an upper opening of the furnace body, an automatic feeding opening and an electrode hole corresponding to the graphite electrode are arranged at the top of the furnace lid, the automatic feeding opening is connected with an automatic feeding device arranged on the operation platform, and the PLC operation table controls the graphite electrode to ascend and descend and controls the rotating platform to rotate intermittently. By means of the novel smelting electric arc furnace for the fused magnesium oxide, the problem of sintering of furnace materials during the smelting process is solved, finished core part is molded to be in a cylinder shape, year-on-year yield increase reaches more than 15%, and electricity is saved by more than 20%.

Description

Novel electrically molten magnesia smelting arc furnace
Technical field
The utility model belongs to nonmetal electric smelting technical field of smelting, is specifically related to a kind of novel electrically molten magnesia smelting arc furnace.
Background technology
China is magnesium resource big country, and electric-melting magnesium is a highly energy-consuming industry.Traditional device, technology are smelted mode and generally adopted: rise fall of electrodes adopts hoist engine steel cord structure, the carbon steel transverse arm that resistance loss is big, clamper; Soft whipping wire connects the short net of transverse arm, hand stock, and no bell hearth is smelted; Petticoat pipe is high apart from 2 meters of platforms of material, and petticoat pipe is pounced on collection flue dust weak effect.This kind extensive style smelting process power consumption is surprising; Can reach 3000KWh/t, simultaneously owing to receiving the limitation of traditional handicraft, although adopted cleaner; But there is most flue dust still can't collect; Cause pollution, so the highly energy-consuming of electric-melting magnesium industry, high pollution become the bottleneck problem of restriction the sector development, reduced and smelt energy consumption, reduce environmental pollution and become an instant job environment.
The utility model content
The technical problem that the utility model solves: a kind of novel electrically molten magnesia smelting arc furnace is provided; Smelting furnace adopts stove tube, body of heater double-decked insulation, and smelting furnace can efficiently solve furnace charge sintering canopy knot in the smelting process through rotation and vibrations in smelting process; The problem of stove, spray stove causes collapsing; And the finished product core is shaped to cylindric, and output increases more than 15% on year-on-year basis, and economize on electricity is more than 20%.
The technical scheme that the utility model adopts: novel electrically molten magnesia smelting arc furnace comprises high-voltage board, transformer, PLC operating desk, low-voltage cabinet, short net and water-cooled cable, said high-voltage board output termination transformer input; Said transformer output termination low-voltage cabinet input; The short net of said low-voltage cabinet output termination one end, cold cable one end of said short net other end water receiving, the said water-cooled cable other end is connected with electrode lifting device one end; The said electrode lifting device other end is fixed with graphite electrode; Said graphite electrode is held in place in the smelting furnace of operating platform below, and said smelting furnace comprises stove tube, body of heater and bell, and said stove tube bottom places on the ground, level basis; Its top is connected with operating platform; Said body of heater places on the chassis and is positioned in the middle of the stove tube, and said chassis is held in place on the rotation platform below ground of level basis, and said bell places on the operating platform and to cover body of heater suitable for reading; Said bell top be provided be installed in operating platform on the auto feed mouth that is connected of automatic feeding device and with the corresponding electrode hole of graphite electrode, said PLC operating desk control graphite electrode goes up and down and rotation platform intermittently rotates.
Wherein, Said electrode lifting device comprises rise fall of electrodes support, column, rise fall of electrodes oil cylinder, conductive cross arm and chuck, and said rise fall of electrodes support lower end is arranged on the ground, level basis, and its upper end is fixed with column; Said rise fall of electrodes oil cylinder is arranged in the rise fall of electrodes support and its piston rod is fixedly connected with column lower end; Said column upper end is equipped with conductive cross arm, and said conductive cross arm one end is connected with water-cooled cable, and its other end is provided with the chuck of anchor stone electrode ink.
Wherein, Said rotation platform comprises support roller group, support, turntable and motor reducer group; Said support is arranged on the level basis below ground, and turntable is connected with support through the support roller group, and said motor reducer group output is connected the rotation of having a rest of driven in rotation interstation with the support roller group.
Further, said bell is provided with three electrode holes and three auto feed mouths, and said three auto feed mouths are arranged on three electrode hole outer rim places and are positioned at three electrode holes between any two.
Further; Said bell sidepiece is provided with three artificial charge doors and two smoke discharging pipes; Said smoke discharging pipe is symmetricly set on bell sidepiece upper end and is connected with dust pelletizing system, and said three artificial charge doors are arranged on bell sidepiece lower end, and said bell inboard also is provided with a decibel detector.
Further, said automatic feeding device is provided with three, is connected with three auto feed holes respectively; Said column also is three; Said three column lower ends are connected with the piston rod of corresponding electrode hoist cylinder respectively, and the column upper end is respectively equipped with conductive cross arm, and said conductive cross arm one end is connected with water-cooled cable respectively; Its other end is respectively equipped with the chuck of anchor stone electrode ink, and said graphite electrode inserts in the body of heater through electrode hole respectively.
Further, be conical for a short time on said body of heater descends greatly.
Further, the tapering of said body of heater is the 5-10 degree.
The utility model advantage compared with prior art:
1, sealing bell+PLC operating desk, variable air rate air inducing dust pelletizing system that frequency converter is adjustable, it is minimum that soot emissions reach;
2, smelting furnace adopts double-decked insulation, reduces the consumption of the energy;
3, body of heater is rotatable, and the product core is shaped to the garden column, and output increases more than 15% on year-on-year basis;
4, body of heater vibrations exhaust adds rotation, anti-furnace charge sintering canopy knot;
5, body of heater adopts pyramidal structure, is beneficial to the dial-out of moulding article;
6, rise fall of electrodes transfers device to adopt electric current+arc stream noise control mode, can in time eliminate the flatulence in the smelting furnace;
7, frequently beat through PLC operating desk detecting electrode electric current or detect arc hissing in the smelting furnace, in time regulate rise fall of electrodes, solve automatic vent problem in the stove through the decibel detector.
Description of drawings
Fig. 1 is the utility model structural front view;
Fig. 2 is the utility model structure vertical view.
The specific embodiment
A kind of embodiment of the utility model is described below in conjunction with accompanying drawing 1,2.
Novel electrically molten magnesia smelting arc furnace comprises high-voltage board 26, transformer 25, PLC operating desk 22, low-voltage cabinet 21, short net 2 and water-cooled cable with big section 3, high-voltage board 26 output termination transformers 25 inputs; Transformer 25 output termination low-voltage cabinets 21 inputs, the short net of low-voltage cabinet 21 output terminations 2 one ends, cold cable 3 one ends of short net 2 other end water receivings; Water-cooled cable 3 other ends are connected with electrode lifting device 4 one ends, and electrode lifting device 4 other ends are fixed with graphite electrode 6, and graphite electrode 6 is held in place in the smelting furnace 36 of operating platform 32 belows; Smelting furnace 36 comprises stove tube 13, body of heater 14 and bell 10, and stove tube 13 bottoms place on the ground 37, level basis, and its top is connected with operating platform 32; For a short time be conical on body of heater 14 times is big, tapering is the 5-10 degree, and body of heater 14 is designed to taper shape; Be beneficial to the extracting smoothly of formed product rear furnace body 14, body of heater 14 places on the chassis 15 and is positioned in the middle of the stove tube 13, and thermal loss is little; Chassis 15 is held in place on the rotation platform 16 of 37 belows, ground, level basis, during rotation platform 16 rotations, drives body of heater 14 unitary rotation; Become column after can making the smelting liquid cooling but in the body of heater 14 like this; Improve productive rate, solve exhaust and crust phenomenon in the smelting process, energy-saving effect is outstanding; PLC operating desk 22 control graphite electrodes 6 go up and down and intermittently rotation of rotation platform 16; Because smelting furnace 36 core temperature up to 4200 ℃, can't realize direct measurement, decibel value, body of heater 14 internal pressures of arc stream, arc voltage and smelting noise when having only through smelting; Be compiled into expert control system to on-the-spot smelting experience; This expert control system has realized detection of dynamic, dynamically control, realizes Based Intelligent Control through the action that graphite electrode 6 goes up and down, body of heater 14 rotates, body of heater 14 shakes, simultaneously; This expert control system can also be got rid of through memory and fault; Form the expert and control technology, the immesurable high-temperature smelting process of microcosmic through result's comparison, is formed new technology.Bell 10 places on the operating platform 32 and to cover body of heater 14 suitable for reading, establishes bell 10 on body of heater 14 tops, can effectively reduce power consumption; And in the smelting process, flue dust can be concentrated discharging, reduces the pollution to environment; Bell 10 electrode districts knotting refractory material, 10 life-spans of bell are long, and heat loss is few; Bell 10 tops be provided be installed in operating platform 32 on three auto feed mouths 9 being connected of three automatic feeding devices 7 and with graphite electrode 6 corresponding three electrode holes 35; Three auto feed mouths 9 are arranged on three electrode holes, 35 outer rim places and are positioned at three electrode holes 35 between any two; Bell 10 sidepieces also are provided with three artificial charge doors 11 and two smoke discharging pipes 27; Smoke discharging pipe 27 is symmetricly set on bell 10 sidepieces upper end and is connected with dust pelletizing system 23; The frequency conversion fan of dust pelletizing system 23 is connected with PLC operating desk 22, gathers the furnace pressure in the bells 10 through PLC operating desk 22, when occurring arc stream, arc voltage in the body of heater 14 and smelting noise occurs when unusual; Through the frequency of PLC operating desk 22 regulation and control frequency conversion fans, reach effective collection flue dust and the purpose that reduces the dedusting energy consumption.Three artificial charge doors 11 are arranged on bell 10 sidepiece lower ends, when special circumstances automatic feeding device 7 cisco unity malfunctions occurring, can give full play to the advantage of hand stock mouth; And stop production without blowing out; Bell 10 inboards also are provided with decibel detector 12, and when body of heater 14 internal sounds were unusual, decibel detector 12 can pass to PLC operating desk 22 to signal; PLC operating desk 22 commander's electrode lifting devices 4 are raised graphite electrode 6 rapidly; Can in time discharge the gas in the body of heater 14, smelting furnace 36 dead aheads are provided with door structure, and fire door can be opened automatically, close through hydraulic jack; Closed structure in conjunction with bell 10 carries out the smelting of electric-melting magnesium in airtight smelting furnace 36, realize the zero-emission of flue dust in the smelting process.
Above-mentioned electrode lifting device 4 comprises rise fall of electrodes support 18, column 33, rise fall of electrodes oil cylinder 34, copper-steel composite conducting transverse arm 5 and conductive chuck 8, and rise fall of electrodes support 18 lower ends are arranged on the ground 37, level basis, and its upper end is fixed with column 33; Rise fall of electrodes oil cylinder 34 is arranged in the rise fall of electrodes support 18 and its piston rod is fixedly connected with column 33 lower ends, and column 33 upper ends are equipped with copper-steel composite conducting transverse arm 5, and copper-steel composite conducting transverse arm 5 one ends are connected with water-cooled cable 3; Its other end is provided with the conductive chuck 8 of anchor stone electrode ink 6, and conductive chuck 8 is novel chrome copper chuck, and intensity is high; Copper-steel composite conducting transverse arm 5 is very important but than the parts that are easier to damage; The quality that its material is selected has determined the overall performance of copper-steel composite conducting transverse arm 5 to a great extent, and the material of conductive chuck 8 adopts conductance high, the big and strong chrome copper of antioxygen property of mechanical strength; Conductive chuck 8 adopts and removably connects with copper-steel composite conducting transverse arm 5; So that maintenance and replacing are provided with cooling-water duct in conductive chuck 8 inside, cooling water system 17 is connected through pipeline and conductive chuck 8; Go out on advancing under the cooling water; Do not have the slough, fully cool off at assurance conductive chuck 8 each position, and temperature is even; Electrode lifting device 4 adopts automatic adjustment technology (digital Based Intelligent Control PLC operating desk 22+ hydraulic proportion valve), and the arc voltage arc stream is stable, and reaction speed is sensitive, no maloperation.
Above-mentioned rotation platform 16 comprises support roller group 31, support 29, turntable 38 and motor reducer group 30; Said support 29 is arranged on 37 belows, ground, level basis; Turntable 38 is connected with support 29 through support roller group 31; Motor reducer group 30 outputs are connected with support roller group 31, and the control through PLC operating desk 22 makes that turntable 38 is realized continuously, interrupted rotation.
Above-mentioned three automatic feeding devices 7 are connected with three auto feed holes 9 respectively, and the configuration of three high hoppers is weighed, the auto feed function.Column 33 also is three; Three column 33 lower ends are connected with the piston rod of corresponding electrode hoist cylinder 34 respectively; Column 33 upper ends are respectively equipped with copper-steel composite conducting transverse arm 5; Copper-steel composite conducting transverse arm 5 one ends are connected with water-cooled cable 3 respectively, and its other end is respectively equipped with the conductive chuck 8 of anchor stone electrode ink 6, and graphite electrode 6 inserts in the body of heater 14 through electrode hole 35 respectively.
Be provided with low-voltage cabinet 21 and PLC operating desk 22 in the electric control room 20; Stokehold Field Console 28 is installed on the operating platform 32; Transformer 25 is arranged in the transformer room 24; Hydraulic Station 19 is installed on the ground 37, level basis and through pipeline and is connected with the hydraulic jack of rise fall of electrodes oil cylinder 34 with the control fire door, and stokehold Field Console 28, PLC operating desk 22 all are connected with measuring instrument (like decibel detector 12, pressure detecting instrument, temperature monitor etc.) with Hydraulic Station 19 respectively through cable.
Above-mentioned transformer 25 adopts 6 outputs mutually, external sealing type, and the electronic pressure regulation of no-load ejects the line mode, reduces impedance, increases arc voltage, improves smelting speed; Every energy-saving short net 2 that adopts two water-cooled cable with big section 3, compensator, copper bar through walls, triangle space to arrange mutually, short net 2 resistance values≤3m Ω, three-phase impedance unbalance degree≤5%, interior resistance is little, and the resistance heat loss is little, guarantees arc voltage.
The foregoing description, just the preferred embodiment of the utility model is not to be used for limiting the utility model practical range, so all equivalences of being done with the said content of the utility model claim change, all should be included within the utility model claim scope.

Claims (8)

1. novel electrically molten magnesia smelting arc furnace; Comprise high-voltage board (26), transformer (25), PLC operating desk (22), low-voltage cabinet (21), short net (2) and water-cooled cable (3); Said high-voltage board (26) output termination transformer (25) input; Said transformer (25) output termination low-voltage cabinet (21) input; Short net (2) one ends of said low-voltage cabinet (21) output termination, cold cable (3) one ends of said short net (2) other end water receiving, said water-cooled cable (3) other end is connected with electrode lifting device (4) one ends; Said electrode lifting device (4) other end is fixed with graphite electrode (6); Said graphite electrode (6) is held in place in the smelting furnace (36) of operating platform (32) below, and it is characterized in that: said smelting furnace (36) comprises stove tube (13), body of heater (14) and bell (10), and said stove tube (13) bottom places on the level ground, basis (37); Its top is connected with operating platform (32); Said body of heater (14) places chassis (15) to go up and be positioned in the middle of the stove tube (13), and said chassis (15) is held in place on the rotation platform (16) of below, level ground, basis (37), and said bell (10) places operating platform (32) to go up and to cover body of heater (14) suitable for reading; Said bell (10) top be provided be installed in operating platform (32) on the auto feed mouth (9) that is connected of automatic feeding device (7) and with the corresponding electrode hole of graphite electrode (6) (35), said PLC operating desk (22) control graphite electrode (6) goes up and down and rotation platform (16) intermittently rotates.
2. novel electrically molten magnesia smelting arc furnace according to claim 1; It is characterized in that: said electrode lifting device (4) comprises rise fall of electrodes support (18), column (33), rise fall of electrodes oil cylinder (34), conductive cross arm (5) and chuck (8); Said rise fall of electrodes support (18) lower end is arranged on the level ground, basis (37); Its upper end is fixed with column (33); Said rise fall of electrodes oil cylinder (34) is arranged in the rise fall of electrodes support (18) and its piston rod is fixedly connected with column (33) lower end; Said column (33) upper end is equipped with conductive cross arm (5), and said conductive cross arm (5) one ends are connected with water-cooled cable (3), and its other end is provided with the chuck (8) of anchor stone electrode ink (6).
3. novel electrically molten magnesia smelting arc furnace according to claim 1; It is characterized in that: said rotation platform (16) comprises support roller group (31), support (29), turntable (38) and motor reducer group (30); Said support (29) is arranged on below, level ground, basis (37); Turntable (38) is connected with support (29) through support roller group (31), and said motor reducer group (30) output is connected intermittently rotation of driven in rotation platform (38) with support roller group (31).
4. according to claim 1,2 or 3 described novel electrically molten magnesia smelting arc furnace; It is characterized in that: said bell (10) is provided with three electrode holes (35) and three auto feed mouths (9), and said three auto feed mouths (9) are arranged on three electrode holes (35) outer rim place and are positioned at three electrode holes (35) between any two.
5. novel electrically molten magnesia smelting arc furnace according to claim 4; It is characterized in that: said bell (10) sidepiece is provided with three artificial charge doors (11) and two smoke discharging pipes (27); Said smoke discharging pipe (27) is symmetricly set on bell (10) sidepiece upper end and is connected with dust pelletizing system (23); Said three artificial charge doors (11) are arranged on bell (10) sidepiece lower end, and said bell (10) inboard also is provided with a decibel detector (12).
6. novel electrically molten magnesia smelting arc furnace according to claim 5; It is characterized in that: said automatic feeding device (7) is provided with three; Be connected with three auto feed holes (9) respectively, said column (33) also is three, and said three columns (33) lower end is connected with the piston rod of corresponding electrode hoist cylinder (34) respectively; Column (33) upper end is respectively equipped with conductive cross arm (5); Said conductive cross arm (5) one ends are connected with water-cooled cable (3) respectively, and its other end is respectively equipped with the chuck (8) of anchor stone electrode ink (6), and said graphite electrode (6) inserts in the body of heater (14) through electrode hole (35) respectively.
7. novel electrically molten magnesia smelting arc furnace according to claim 6 is characterized in that: be conical for a short time on said body of heater (14) is big down.
8. novel electrically molten magnesia smelting arc furnace according to claim 7 is characterized in that: the tapering of said body of heater (14) is the 5-10 degree.
CN2011201883992U 2011-06-08 2011-06-08 Novel smelting electric arc furnace for fused magnesium oxide Expired - Lifetime CN202153094U (en)

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Application Number Priority Date Filing Date Title
CN2011201883992U CN202153094U (en) 2011-06-08 2011-06-08 Novel smelting electric arc furnace for fused magnesium oxide

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102252516A (en) * 2011-06-08 2011-11-23 宝鸡铠丰科技发展有限公司 Novel fused magnesia smelting electric arc furnace
CN102625508A (en) * 2012-04-11 2012-08-01 西安越达环保科技有限公司 Electrode lifting mechanism with adjustable electrode circle, furnace cover and electric arc furnace
CN102620555A (en) * 2012-03-30 2012-08-01 西安越达环保科技有限公司 Single-point feeding and multipoint spreading device and electric-arc furnace
CN103090662A (en) * 2013-02-01 2013-05-08 西安电炉研究所有限公司 Novel electrode lifting device
CN104422273A (en) * 2013-08-31 2015-03-18 大同特殊钢株式会社 Arc furnace
CN104713349A (en) * 2015-03-05 2015-06-17 润鸣新素材(通辽)有限公司 Airtight negative pressure electric arc smelting furnace
CN104803617A (en) * 2015-04-16 2015-07-29 辽宁帝诺镁业集团有限公司 Macrocrystalline fused magnesite smelting furnace
CN105841487A (en) * 2016-04-19 2016-08-10 湖南水口山有色金属集团有限公司 Smelting furnace heat compensating device and smelting furnace
CN111473641A (en) * 2020-04-23 2020-07-31 海城三岩矿业有限公司 Electric arc furnace temperature control method for fused magnesia production

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102252516A (en) * 2011-06-08 2011-11-23 宝鸡铠丰科技发展有限公司 Novel fused magnesia smelting electric arc furnace
CN102620555A (en) * 2012-03-30 2012-08-01 西安越达环保科技有限公司 Single-point feeding and multipoint spreading device and electric-arc furnace
CN102625508A (en) * 2012-04-11 2012-08-01 西安越达环保科技有限公司 Electrode lifting mechanism with adjustable electrode circle, furnace cover and electric arc furnace
CN102625508B (en) * 2012-04-11 2014-03-26 西安越达环保科技有限公司 Electrode lifting mechanism with adjustable electrode circle, furnace cover and electric arc furnace
CN103090662A (en) * 2013-02-01 2013-05-08 西安电炉研究所有限公司 Novel electrode lifting device
CN104422273B (en) * 2013-08-31 2018-06-12 大同特殊钢株式会社 Electric arc furnaces
CN104422273A (en) * 2013-08-31 2015-03-18 大同特殊钢株式会社 Arc furnace
CN104713349A (en) * 2015-03-05 2015-06-17 润鸣新素材(通辽)有限公司 Airtight negative pressure electric arc smelting furnace
CN104713349B (en) * 2015-03-05 2016-07-06 润鸣新素材(通辽)有限公司 Airtight negative pressure electric smelting furnace
CN104803617A (en) * 2015-04-16 2015-07-29 辽宁帝诺镁业集团有限公司 Macrocrystalline fused magnesite smelting furnace
CN105841487A (en) * 2016-04-19 2016-08-10 湖南水口山有色金属集团有限公司 Smelting furnace heat compensating device and smelting furnace
CN105841487B (en) * 2016-04-19 2018-02-23 湖南水口山有色金属集团有限公司 A kind of smelting furnace heat patching device and smelting furnace
CN111473641A (en) * 2020-04-23 2020-07-31 海城三岩矿业有限公司 Electric arc furnace temperature control method for fused magnesia production

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