CN102816879A - Burden distribution method for bucket string-type bell-free blast furnace - Google Patents
Burden distribution method for bucket string-type bell-free blast furnace Download PDFInfo
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- CN102816879A CN102816879A CN201210274283XA CN201210274283A CN102816879A CN 102816879 A CN102816879 A CN 102816879A CN 201210274283X A CN201210274283X A CN 201210274283XA CN 201210274283 A CN201210274283 A CN 201210274283A CN 102816879 A CN102816879 A CN 102816879A
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Abstract
The invention relates to a burden distribution method for a bucket string-type bell-free blast furnace. The burden distribution method is used for furnace throat dispensing when blast furnace burden produces burden surface segregation or local slipping. The burden distribution method provided by the invention is characterized in that a burden flow control device is installed on the existing string-type bell-free blast furnace top charging device; when furnace throat dispensing is needed, the burden flow control device is adjusted so that burden flowing out of charging buckets passes through the burden flow control device, then flows down to a chute along a central throat pipe wall and then flows to a blast furnace throat along the chute, wherein when the burden is located at the lowest point of a burden surface, the flow of the burden reaches to the maximum value; and if a burden surface inclined state is improved but does not satisfy normal production requirements after a burden distribution process, furnace throat dispensing is carried out sequentially in the next burden distribution process until a burden surface shape satisfies normal production requirements and then normal burden distribution of a blast furnace is restored. The burden distribution method provided by the invention can fully utilize flexibility and convenience of bell-free blast furnace top burden distribution, can realize dispensing of a blast furnace, can reduce impact on equipment, can prolong an equipment service life, and has good burden distribution effects better than burden distribution effects of fan-shaped burden distribution.
Description
Technical field
The invention belongs to technical field of blast furnace ironmaking, particularly a kind of tandem tank type bell-less blast furnace distributing process that is applicable in the blast furnace ironmaking process.
Background technology
At present, blast furnace ironmaking remains the main mode of obtaining the pig iron, in ironmaking is produced, occupies dominant position.Along with promoting the use of of no bell furnace roof equipment, the non material bell cloth mode shows huge advantage, and is more flexible rationally than the bell cloth, can make full use of the heat energy and the chemical energy of blast furnace gas, and guarantees the blast furnace stable smooth operation.The typical distributing mode of no bell furnace roof comprises annular cloth, screw distribution, fixed point cloth and fan-shaped cloth, and wherein annular cloth and screw distribution are the main distributing modes that daily ironmaking is produced, and its equipment load impact is little, cloth is even; Fixed point cloth and fan-shaped cloth are used to adjust in the stove segregation and collapse the furnace condition disorder that material causes with local; Wherein fix a point cloth can only with blast furnace burden cloth to furnace throat a bit on; Cloth is limited in scope, and fan-shaped cloth needs equipment to swing repeatedly at sector region, and the impact that equipment bears is bigger; The cloth intermediate thin, both sides are thick.
The principal mode of no bell furnace roof equipment comprises and pot type and two kinds of forms of tandem tank type.Production practice and theoretical analysis are all found and pot type does not have the bell furnace top distributing gear and has inevitable cloth segregation phenomena; The flow that is furnace charge is non-constant; Need behind the theoretical analysis to agglomerate (perhaps pellet) and coke the order of packing into, charging method, batch heavily wait and rationally to arrange the loaded down with trivial details and difficult change of the formulation of charging system.And tandem tank type does not have the bell furnace top distributing gear and does not have the cloth segregation phenomena, charging system confirm comparatively flexible and convenient, so become the main flow form of present no bell furnace roof.
Tandem tank type does not have work-ing life and the stability in use that the bell furnace top distributing gear produces load impacting when furnace throat is adjusted problem has had a strong impact on the blast furnace top charging equipment; In a single day equipment break down; Can cause serious economy loss; Therefore need a kind of novel tandem tank type bell-less blast furnace distributing process, solve furnace throat adjustment problem more flexibly, realize the longevityization of blast-furnace equipment.
Summary of the invention
The object of the present invention is to provide a kind of tandem tank type bell-less blast furnace distributing process; Interior segregation of the stove that can be used to flexibly adjust and part collapse material; The at the uniform velocity rotation that keeps chute during adjustment; Eliminate blast furnace chute and swing the loading device load impacting of generation repeatedly, protection blast furnace top charging equipment guarantees the conditions of blast furnace stable smooth operation.
When effusive furnace charge in the batch can when offside material guiding pipe (center trunnion) tube wall descends, along with the rotation of distributor chute, the materials flow drop point forms ellipticorbit on chute.Because self rotation of inclined to one side row and the chute of furnace charge in the trunnion of center; Make that the axis direction along chute is elongated (thinning dredging) or shortens (becoming fine and close) originally even mobile furnace charge in the moment of falling chute; Cause the flow of furnace charge on chute to change, the actual charging flow of falling on the furnace throat charge level changes according to sinusoidal rule basically.
Utilize above-mentioned principle, provide following technical scheme of the present invention:
The materials flow gear that a cover can change the materials flow movement locus is installed at the discharge funnel place, top of trunnion at the center of tandem tank type non-bell furnace top charging equipment; Make when non-bell furnace top charging equipment adopts annular distributing mode works better; The central axis of furnace charge trunnion along the center falls; The materials flow amount of furnace charge is even, and distributor chute rotates according to uniform circular motion, on charge level, forms the annulus of even equal altitudes; In the charge level segregation or the part takes place collapse when material, furnace throat place furnace charge is no longer about blast furnace central axis symmetry, and the charge level run-off the straight needs furnace throat to adjust, and does not at this moment use fixed point cloth and fan-shaped cloth.At first use stockline stock rod or charge level detection instrument that shape of charge level is analyzed, confirm the position and the charge level inclined degree data of charge level valley, adjust for furnace throat and obtain data necessary; Collapse when expecting if the part perhaps takes place the segregation of data presentation charge level,, determine the position that materials flow and center trunnion tube wall come in contact then according to the shape of furnace throat charge level; The control of adjustment materials flow gear falls into the relative position of vertical materials flow of center trunnion and center trunnion central axis, promptly confirms the position that materials flow and center trunnion tube wall come in contact, and the center of materials flow trunnion from the center is adjusted to the tube wall of center trunnion; The trunnion tube wall drops to chute along the center behind the effusive furnace charge process materials flow gear in the batch can; Slide to blast furnace throat along chute then, just be the peak of stream flow when furnace charge is fallen the charge level lowermost, behind the chute Rotate 180 °; Just be the minimum value of stream flow during vertex place that furnace charge is fallen charge level; If behind the cloth, the charge level tilt condition improves but does not reach ordinary production needs as yet, proceeds the furnace throat adjustment during next cloth; Return to the ordinary production needs until shape of charge level; Coal gas recovers the normal cloth of blast furnace till distributing rationally subsequently, promptly even equal altitudes cloth.
Confirming of the position that described materials flow and center trunnion tube wall come in contact is when departing from center trunnion central axis according to materials flow, in the chute rotary course; The track of materials flow on chute is oval; Wherein the intersection point of the medullary ray of center trunnion and chute is oval mid point, is major axis along the chute axis direction, and the direction of vertical chute axis and major axis is a minor axis; Materials flow is the peak of materials flow when oval tangent line is to the chute slid underneath on minor semi-axis and the oval intersection point and continuation edge; With the furnace charge cloth of this point valley to the furnace throat charge level, fall the time required on the charge level in conjunction with furnace charge through chute, determine the position that materials flow and center trunnion tube wall come in contact.
The structure of said materials flow gear mainly comprises control panel, circular orbit, hydro-cylinder, shelves flitch, electronic slide block and hydrauliccircuit and electric loop; Circular orbit is fixed on transfixion on the discharge funnel; Electronic slide block is installed on the circular orbit, and electronic slide block is slided clockwise or counterclockwise along circular orbit by the driving of motor through the control of control panel and adjusts the position of electronic slide block on circular orbit.One end of blocking material plate is installed on the electronic slide block through hinge, moves with electronic slide block.The hydro-cylinder cylinder barrel is installed on the electronic slide block through hinge, and piston rod is installed in the front portion of blocking material plate through hinge, in off working state; Piston rod returns in the cylinder barrel, and the position of blocking material plate does not influence the vertical whereabouts of furnace charge near vertically; When carrying out the furnace throat adjustment, piston rod supports blocking material plate, and blocking material plate and vertical direction form certain angle; Can the furnace charge that fall be kept off the opposite of electronic slide block, furnace charge can be along the center tube wall one side of trunnion descending.Other major partss except that control panel are installed among the top charging equipment, through control panel the materials flow gear are controlled.For safeguarding the daily production of blast furnace, can build service platform at blast furnace top charging equipment place usually, and be equipped with Hydraulic Station and electrical system, the hydraulic power of this device relies on this Hydraulic Station, and electric power is supplied with and is relied on this electrical system.
The main effect of materials flow gear: the one, change the materials flow movement locus, when needing furnace throat to adjust, the center of materials flow trunnion from the center adjusted to the tube wall of center trunnion; The 2nd, control the relative position that falls into vertical materials flow of center trunnion and center trunnion central axis according to the shape of furnace throat charge level, promptly confirm the position that materials flow and center trunnion tube wall come in contact.Because materials flow departs from center trunnion central axis; In the chute rotary course, the track of materials flow on chute is oval, and wherein: the medullary ray of center trunnion and the intersection point of chute are oval mid point; Along the chute axis direction is major axis, and the direction of vertical chute axis and major axis is a minor axis.Minor semi-axis reaches peak and minimum value respectively with the flow of the intersection point place furnace charge of ellipse; Wherein materials flow is on minor semi-axis and the oval intersection point and to continue along oval tangent line be the peak of materials flow during to the chute slid underneath, with the furnace charge cloth of this some valley to the furnace throat charge level.Because furnace charge is fallen and needed the regular hour on the charge level through chute,, can confirm the position that materials flow and center trunnion tube wall come in contact thus so the chute corner angle when furnace charge is fallen position angle on the charge level and just fallen on the chute than this furnace charge is leading.
Advantage of the present invention is: the deficiency that has solved existing blast furnace material distribution technology; Through improving existing installation, make full use of the flexible characteristics of no bell roof material distributing, conditions of blast furnace is adjusted; The impact that minimizing equipment possibly occur, the also more fan-shaped cloth of cloth effect is good.
Description of drawings
Fig. 1 is the furnace throat sectional view of the normal cloth of blast furnace bell-less furnace roof;
Fig. 2 is the blast furnace throat sectional view that charging segregation fashion is not adjusted;
Fig. 3 is to use the furnace throat sectional view that furnace throat is adjusted behind the distributing process of the present invention;
Fig. 4 is that the master of materials flow gear looks sectional view;
Fig. 5 is the vertical view of materials flow gear.
Among the figure: 1-blast furnace furnace wall, 2-coke, 3-agglomerate, the mixolimnion of 4-coke and agglomerate, 5-discharge funnel, 6-circular orbit, 7-blocking material plate, 8-piston rod, 9-cylinder barrel, the electronic slide block of 10-, 11-motor.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is done further explain.
Embodiment one:
Blast furnace throat to useful volume 2500m3 carries out cloth, and its relevant parameter is criticized heavy 135kg for comprising agglomerate, and coke is criticized heavy 20kg; Center trunnion radius 0.375m, blast furnace throat diameter 5m, stockline degree of depth 2.5m; Chute length 3m, chute angular velocity of rotation 0.92rad/s.The cloth working specification of this method is following:
1. the charge level detection instrument is analyzed shape of charge level; Confirm the data such as position and charge level inclined degree of charge level valley; Do not need to adjust if detection data shows, then do not use the distributing process of this invention, according to the daily charging system continuation cloth of original setting; If result of detection shows charge level segregation or part and collapses material, then uses distributing process of the present invention.
2. after the valley of confirming charge level, (collapse the occurrence positions of material) as confirming the part; Write down the angle of this position at furnace throat; Because falling through chute, furnace charge needs the regular hour on the charge level; Leading 20 ° of the chute corner angle when so furnace charge is fallen position angle on the charge level and just fallen on the chute than this furnace charge, the position that this position falls for the tube wall of stream material trunnion along the center.
The gap of twice cloth through control panel adjustment materials flow gear in electronic slide block 10 position of 6 on circular orbit; This position is the opposite of materials flow position, trunnion tube wall whereabouts along the center; Promptly differ 180 °; Open hydraulicefficiency system then, blocking material plate 7 is supported, carry out backgauge when preparing next cloth.
4. carry out the cloth first time that furnace throat is adjusted.Behind the cloth; The charge level detection instrument continues shape of charge level is analyzed, if shape of charge level improves, but does not reach needs of production as yet; Then proceeding furnace throat adjusts; Up to reaching needs of production, in case reach needs of production then blocking material plate 7 is packed up, and electronic slide block 10 is adjusted to starting position wait for that adjust next time and use.
5. recover daily production charging system after adjustment is accomplished and carry out the cloth operation, and implement charge level and monitor.
Claims (3)
1. tandem tank type bell-less blast furnace distributing process is characterized in that: the materials flow gear that a cover can change the materials flow movement locus is installed at the discharge funnel place, top of trunnion at the center of tandem tank type non-bell furnace top charging equipment, at first uses stockline stock rod or charge level detection instrument that shape of charge level is analyzed; Confirm the position and the charge level inclined degree data of charge level valley, if data presentation charge level segregation or the part takes place collapse when material, then according to the shape of furnace throat charge level; Determine the position that materials flow and center trunnion tube wall come in contact, the control of adjustment materials flow gear falls into the relative position of vertical materials flow of center trunnion and center trunnion central axis, the center of materials flow trunnion from the center is adjusted to the tube wall of center trunnion; The trunnion tube wall drops to chute along the center behind the effusive furnace charge process materials flow gear in the batch can; Slide to blast furnace throat along chute then, just be the peak of stream flow when furnace charge is fallen the charge level lowermost, behind the chute Rotate 180 °; Just be the minimum value of stream flow during vertex place that furnace charge is fallen charge level; If behind the cloth, the charge level tilt condition improves but does not reach ordinary production needs as yet, proceeds the furnace throat adjustment during next cloth; Return to the ordinary production needs until shape of charge level; Coal gas recovers the normal cloth of blast furnace till distributing rationally subsequently, promptly even equal altitudes cloth.
2. tandem tank type bell-less blast furnace distributing process according to claim 1; It is characterized in that: confirming of the position that described materials flow and center trunnion tube wall come in contact is when departing from center trunnion central axis according to materials flow, in the chute rotary course; The track of materials flow on chute is oval; Wherein the intersection point of the medullary ray of center trunnion and chute is oval mid point, is major axis along the chute axis direction, and the direction of vertical chute axis and major axis is a minor axis; Materials flow is the peak of materials flow when oval tangent line is to the chute slid underneath on minor semi-axis and the oval intersection point and continuation edge; With the furnace charge cloth of this point valley to the furnace throat charge level, fall the time required on the charge level in conjunction with furnace charge through chute, determine the position that materials flow and center trunnion tube wall come in contact.
3. tandem tank type bell-less blast furnace distributing process according to claim 1 and 2; It is characterized in that: the structure of said materials flow gear mainly comprises control panel, circular orbit, hydro-cylinder, shelves flitch, electronic slide block and hydrauliccircuit and electric loop; Circular orbit is fixed on transfixion on the discharge funnel; Electronic slide block is installed on the circular orbit; One end of blocking material plate is installed on the electronic slide block through hinge, and the hydro-cylinder cylinder barrel is installed on the electronic slide block through hinge, and piston rod is installed in the front portion of blocking material plate through hinge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201210274283 CN102816879B (en) | 2012-08-03 | 2012-08-03 | Burden distribution method for bucket string-type bell-free blast furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210274283 CN102816879B (en) | 2012-08-03 | 2012-08-03 | Burden distribution method for bucket string-type bell-free blast furnace |
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| CN102816879A true CN102816879A (en) | 2012-12-12 |
| CN102816879B CN102816879B (en) | 2013-10-02 |
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| CN 201210274283 Expired - Fee Related CN102816879B (en) | 2012-08-03 | 2012-08-03 | Burden distribution method for bucket string-type bell-free blast furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104946838A (en) * | 2015-07-21 | 2015-09-30 | 方大特钢科技股份有限公司 | Blast furnace fan-shaped distribution method |
| CN105112590A (en) * | 2015-09-25 | 2015-12-02 | 九江萍钢钢铁有限公司 | Funnel-shaped burden surface distribution method for blast furnace |
| CN107782760A (en) * | 2017-10-20 | 2018-03-09 | 武汉钢铁有限公司 | The method of testing of high furnace charge melting Performance Match degree |
| CN108517382A (en) * | 2018-03-29 | 2018-09-11 | 江苏省沙钢钢铁研究院有限公司 | Device and method for achieving graded and quality-divided charging of raw fuel in blast furnace |
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| JPS6067604A (en) * | 1983-09-19 | 1985-04-18 | Sumitomo Metal Ind Ltd | Measurement of interior condition of blast furnace |
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| CN102277458A (en) * | 2011-07-26 | 2011-12-14 | 中冶赛迪工程技术股份有限公司 | Material tank feeding method and feeding device |
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2012
- 2012-08-03 CN CN 201210274283 patent/CN102816879B/en not_active Expired - Fee Related
Patent Citations (3)
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| JPS6067604A (en) * | 1983-09-19 | 1985-04-18 | Sumitomo Metal Ind Ltd | Measurement of interior condition of blast furnace |
| JPS62224608A (en) * | 1986-03-26 | 1987-10-02 | Sumitomo Metal Ind Ltd | Operating method for bell-less type blast furnace |
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Non-Patent Citations (1)
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| 任廷志: "并罐式无钟高炉均匀布料法", 《重型机械》, 31 December 2003 (2003-12-31), pages 28 - 30 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104946838A (en) * | 2015-07-21 | 2015-09-30 | 方大特钢科技股份有限公司 | Blast furnace fan-shaped distribution method |
| CN105112590A (en) * | 2015-09-25 | 2015-12-02 | 九江萍钢钢铁有限公司 | Funnel-shaped burden surface distribution method for blast furnace |
| CN105112590B (en) * | 2015-09-25 | 2017-05-10 | 九江萍钢钢铁有限公司 | Funnel-shaped burden surface distribution method for blast furnace |
| CN107782760A (en) * | 2017-10-20 | 2018-03-09 | 武汉钢铁有限公司 | The method of testing of high furnace charge melting Performance Match degree |
| CN107782760B (en) * | 2017-10-20 | 2019-09-24 | 武汉钢铁有限公司 | The test method of high furnace charge melting Performance Match degree |
| CN108517382A (en) * | 2018-03-29 | 2018-09-11 | 江苏省沙钢钢铁研究院有限公司 | Device and method for achieving graded and quality-divided charging of raw fuel in blast furnace |
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| CN102816879B (en) | 2013-10-02 |
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