CN1837377A - Slag-back prevention and parallel aeration process for blast furnace - Google Patents
Slag-back prevention and parallel aeration process for blast furnace Download PDFInfo
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- CN1837377A CN1837377A CNA2006100438011A CN200610043801A CN1837377A CN 1837377 A CN1837377 A CN 1837377A CN A2006100438011 A CNA2006100438011 A CN A2006100438011A CN 200610043801 A CN200610043801 A CN 200610043801A CN 1837377 A CN1837377 A CN 1837377A
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Abstract
This invention provides the residue-proof and parallel connection air feed process of the high furnace, it can solve such problems as the disbalanceable hardware configuration in high furnace air feed system, the efficiency of air feed systerm isn't high, and damping down and residue-proof in the high furnace caused by air feed system fault. This invention offers a parallel connection air feed technology in the air feed systerm, installing auxiliary air supply duct on main air supply duct of high furnace fan, install auxiliary one and main one in parallel to form air-supply network, monitor the air supply condition of every high furnace with control system,in order to adjust corresponding parameters, to change-over between main air supply duct and auxiliary one and control them, to make other fans of high furnaces supply air for the high furnace whose air supply is insufficient and the one whose fan is damaged.
Description
Technical field
The present invention relates to the blast furnace ventilation apparatus, relate in particular to the pipe network configuration and the automated control technology of many iron-smelting blast furnaces and Duo Tai air feed fan parallel-connection air feed technology.
Background technology
At present, known iron-smelting blast furnace air feed system adopts the configuration of many typhoons machine, the using and the reserved, how be equipped with one or usefulness how fully, promptly have only a typhoon machine to be in the air feed state to a blast furnace, other blower fans are as stand-by fan, and the blower fan of each blast furnace is special fan, and independent air feed can not be striden the stove air-supply.The coordinative composition of equipments imbalance often appears in the transformation along with the development of enterprise and iron-smelting process, ironmaking equipment, and blower fan air feed amount of owing or excessive phenomenon cause energy dissipation, influence furnace processor to enterprise; Simultaneously after the air feed blower fan is shut down for some reason; enabling stand-by fan is the blast furnace air feed; because switching time is longer; cause blast furnace staying in short-term or blast furnace to irritate the phenomenon of slag; the blast furnace air inlet mouth is surrounded by high temperature furnace slag after irritating slag; cause the air port to stop up or damage, blast furnace is forced to blowing out, and the direct and consequential damage that causes to enterprise is huge.
Summary of the invention
Uneven in order to solve existing blast furnace air feed system equipment configuration, air feed system usefulness is not in full use, and blast furnace staying, blast furnace that the air feed system fault causes are irritated problems such as slag, the invention provides a kind of air feed technology in parallel of blast furnace air feed system, this technology not only can be avoided irritating the slag phenomenon because of the blast furnace staying that the ventilation apparatus reason causes, blast furnace, can improve simultaneously the wind supply quantity of blast furnace according to different states of arts in varying degrees, improve the utilization coefficient and the furnace processor of blast furnace.
This programme is realized by following technical measures: on the main air-supply pipeline of each blast furnace blower auxiliary wind path is set, to lead air-supply pipeline and auxiliary wind path and be unified into the air feed pipe network, by Controlling System the air feed situation of each blast furnace is monitored, in time adjust each relevant parameter of blower fan, realization is to the switching and the adjustment control of major-minor wind path, and the blower fan of realizing other blast furnace is that the air feed amount of owing blast furnace is mended wind and in time is the blast furnace air-supply that fan trouble occurs.The principle of this technical scheme is: the first, when certain blast furnace blower air feed amount of owing, other blower fans are mended wind by auxiliary wind path to this blast furnace, adjust other blower fan and each correlation parameter of air feed pipe network automatically simultaneously, make blower fan work and wind supply quantity reach optimum regime; When the second, certain blast furnace blower breaks down, other blast furnace blower, except that blowing by main this blast furnace of blast tube road direction, also blow to the fault blast furnace by auxiliary wind path, at this moment the valve on connected other auxiliary wind path is closed rapidly, stop air feed, adjust each correlation parameter of blower fan simultaneously automatically, make blower fan work and wind supply quantity reach optimum regime for other blast furnace.Making other blast furnace blower by above operation is the blast furnace air feed that breaks down.Because the blast furnace air feed was restored in the extremely short time, blast furnace damping down can not occur and irritate the slag problem, guarantees that conditions of blast furnace is stable.The state of blast furnace air feed is mainly judged by parameters such as pressure detection, flow monitoring, blower fan working ordeies, realizes the switching and the control of air feed parameter regulation of blast furnace air feed pipe network simultaneously by valve combination control.
The beneficial effect of this programme can be learnt according to the narration to such scheme, change traditional single blower fan air feed pattern, adopt air feed technology in parallel, be achieved as follows beneficial effect: the air feed in parallel that 1, passes through the different parameters blower fan, device resource is fully used, blower fan air feed usefulness is all used, improve wind supply quantity, and then improve the utilization coefficient and the iron output of blast furnace blast furnace.Reach the rational energy configuration and use, optimize the operation of blast furnace air feed system, the purpose that increases production and improves productivity.2, when the blast furnace blower fault, the blast furnace air feed was restored in the time of extremely lacking, and blast furnace damping down can not occur and irritate the slag problem, guaranteed that conditions of blast furnace is stable, the financial loss of having avoided damage air port equipment and stopping production to cause.The original 350m of certain smelter for example
36 in blast furnace, motor fan have 8, and wherein the D1100 blower fan is 7, and 1 of D1000 blower fan, air supply mode are that six typhoon machines independently are respectively six blast furnace air feeds, and two typhoon machines are as stand-by fan.Along with the raising of smelting strength of blast furnace, the improved potentiality of motor fan energy efficiency have been dug to the greatest extent, still can not satisfy the production needs of blast furnace.If former air feed system is carried out " anti-slag and the air feed technology in parallel of irritating of blast furnace " system reform engineering, transforming the back air supply mode is: six typhoon machines are respectively six blast furnace air feeds as primary air fan, provide auxiliary wind and security personnel wind as accessory fan for six blast furnaces with a stand-by fan simultaneously.The benefit that operation back is produced is as follows: 1, the capacity factor of a blast furnace: the capacity factor of a blast furnace is brought up to more than 3.5 from 2.9, is up to 4.0.
2, blast furnace volume increase direct benefit:
(1), on average to increase air quantity be 800m to every blast furnace
3/ h, daily output iron on average increases by 400 tons, and a year blast furnace increases the iron benefit and just reaches 7,680 ten thousand yuan.
(2), because the increase of air quantity and the raising of blast, the corresponding increase of blast energy strengthens the active relatively ability of accepting coal dust of blast furnace hearth.Therefore, blast furnace with transform before compare average many coal powder injections of ton iron 18Kg, by 70 yuan of calculating of ton coal benefit, 50.8 ten thousand yuan of year many coal powder injections benefits.
3, avoid blast furnace to irritate economic benefit that slag is created
Every blast furnace annual is irritated slag 2 times, influences blast furnace at every turn and produces more than 10 hours, per hour makes every blast furnace tap a blast furnace about 55 tons less, and ton iron benefit is by 600 yuan of calculating, and the benefit that this project operation back blast furnace is not irritated slag iron output to be increased is 3,960,000 yuan; Each spare part expense of saving is about 100,000 yuan, and a year saving spare part expense is about 1,200,000 yuan; Adding up to a year wound economic benefit is 5,160,000 yuan.
Add up to create economic benefit last year: year is 8246.8 ten thousand yuan, removes project reconstruction and invests 8,200,000 yuan, is for the year net benefits that enterprise created because of implementing " anti-slag and the air feed technology in parallel of irritating of blast furnace " technology: 7426.8 ten thousand yuan.The present invention has compared with prior art solved technical problem, has realized technical purpose.
The concrete characteristics of this programme also have, and at least one typhoon machine is blown to other blast furnace by auxiliary wind path under the Controlling System regulation and control in each blast furnace blower.Promptly can have two or many typhoons machine to adopt the air supply line parallel way is one or many blast furnace air feeds, can make full use of and use blower fan, realizes that a plurality of blower fans dispose a plurality of blast furnace air feeds, and the raising plant factor reduces cost.To assist the air feed machine and incorporate the air-supply pipe network into, under Controlling System control, blow to each blast furnace by auxiliary wind path.Every blast furnace has a primary air fan, one or more accessory fan is arranged simultaneously simultaneously for this blast furnace send auxiliary wind or security personnel's wind, and every accessory fan also can be used as the primary air fan of another blast furnace simultaneously.If during accessory fan dereliction air feed function, except that being the pipeline of fault blast furnace air feed, the valve of other auxiliary air supply pipeline that is attached thereto is closed rapidly, stops to be other blast furnace air feed, automatically adjust each correlation parameter of blower fan simultaneously, make blower fan work and wind supply quantity reach optimum regime.
Description of drawings:
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is that a typhoon machine provides for many typhoons machine and wind or as the equipment configuration schematic diagram under security personnel's wind process mode among the present invention;
Blast furnace provides auxiliary wind in parallel, is No. three working state figures under the blast furnaces security personnel wind process situation Fig. 2 for one, two and No. four simultaneously for No. five blower fans;
Fig. 3 is No. two blower fans working state figures when breaking down;
Fig. 4 is No. three blower fans working state figures when breaking down;
Equipment configuration schematic diagram when Fig. 5 had not only made primary air fan and provides auxiliary wind in parallel or security personnel's wind for many blast furnaces simultaneously but also with superfluous wind for a typhoon machine;
Fig. 6 is that No. two blower fans provide auxiliary wind in parallel, provide working state figure under security personnel's wind process situation for No. three blast furnaces for blast furnace in for No. two blast furnace master air-supplies;
Fig. 7 is blower fan working state figure when breaking down;
Fig. 8 is No. three blower fans working state figures when breaking down;
Among the figure, 1, blower fan, 2, No. two blower fans, 3, No. three blower fans, 4, No. four blower fans, 5, No. five blower fans, 10, blast furnaces, 20, No. two blast furnaces, 30, No. three blast furnaces, 40, No. four blast furnaces, 11, vacuum breaker, 21, vacuum breaker, 31, vacuum breaker, 41, vacuum breaker, 51, vacuum breaker, 12, variable valve, 22, variable valve, 32, variable valve, 42, variable valve, 13, quick-closing valve, 23, quick-closing valve, 33, quick-closing valve, 43, quick-closing valve.More than among each figure: blower fan is filled to the representative fan trouble of black and shuts down, and the representative blower fan that blower fan is filled to white normally moves; Quick-closing valve is filled to the representative quick-closing valve of black and closes, and quick-closing valve is filled to the representative quick-closing valve of white and opens; It is the normal regulating attitude that variable valve is filled to black and white representative valve, it is the complete shut-down attitude that variable valve is filled to holomelanocratic representative valve, it is the standard-sized sheet attitude that variable valve is filled to hololeucocratic representative valve, and vacuum breaker is filled to the representative of white and opens, and vacuum breaker is filled to the representative pass of black.
Embodiment
1: one typhoon machine of embodiment provides auxiliary wind in parallel or security personnel's wind process for many blast furnaces
As shown in Figure 1, blast furnace, blower fan configuration relation are as shown in table 1, blower fan 1, No. two blower fans 2, No. three blower fans 3, No. four blower fans 4 are single main air feed machine, be respectively the main air feed of blast furnace 10, No. two blast furnaces 20, No. three blast furnaces 30, No. four blast furnaces 40, No. five blower fans 5 are auxilliary air feed machine in parallel, can be simultaneously for the part or all of blast furnace in one to No. four blast furnace provides auxiliary wind, or security personnel's wind.
Table 1, blast furnace, blower fan possible configuration relation table
As shown in Figure 2, blower fan 1, No. two blower fans 2, No. three blower fans 3 and No. four blower fans 4 respectively by vacuum breaker 11, vacuum breaker 21, vacuum breaker 31, vacuum breaker 41 to blast furnace 10, No. two blast furnaces 20, No. three blast furnaces 30 and No. four blast furnace 40 main air feeds; No. five blower fans 5 provide auxiliary wind in parallel for blast furnace 10, No. two blast furnaces 20 and No. four blast furnaces 40 and simultaneously as security personnel's wind of No. three blast furnaces 30; At this moment quick-closing valve 13, quick-closing valve 23, quick-closing valve 43 are in the standard-sized sheet attitude, and variable valve 12, variable valve 22, variable valve 42 are in the normal regulating attitude, and quick-closing valve 33 is closed.
As shown in Figure 3, when No. two blower fans 2 break down, when vacuum breaker 21 ends, variable valve 22 and quick-closing valve 23 standard-sized sheets, No. five blower fans 5 are to No. two blast furnace 20 main air feeds, the quick-closing valve 13, quick-closing valve 33, the quick-closing valve 43 that are positioned at simultaneously on the auxiliary wind path are closed rapidly, and variable valve 12, variable valve 32, variable valve 42 are also closed; Guarantee that No. five blower fans 5 are to No. two blast furnace 20 air feeds.
As shown in Figure 4, when No. 3 primary air fans break down, when vacuum breaker 31 ends, variable valve 32 and quick-closing valve 33 standard-sized sheets, No. five blower fans 5 are to No. three blast furnace 30 main air feeds, the quick-closing valve 13, quick-closing valve 23, the quick-closing valve 43 that are positioned at simultaneously on the auxiliary wind path are closed rapidly, and variable valve 12, variable valve 22, variable valve 42 are also closed; Guarantee that No. five blower fans 5 are to No. three blast furnace 30 air feeds.
As shown in Figure 5, blower fan 1, No. two blower fans 2, No. three blower fans 3, No. four blower fans 4 are single main air feed machine, be respectively the main air feed of blast furnace 10, No. two blast furnaces 20, No. three blast furnaces 30, No. four blast furnaces 40, No. two blower fans 2 are except that being No. two blast furnace 20 main air-supplies, and its superfluous wind can provide auxiliary wind or security personnel's wind for the part or all of blast furnace in other three blast furnaces simultaneously.
Table 2, blast furnace, blower fan possible configuration relation table
As shown in Figure 6, among the present invention No. two blower fans 2 in for No. two blast furnaces 20 main air-supplies for blast furnace 10 provides auxiliary wind, blast furnace 30 provides security personnel wind for No. three.Such No. two blower fans 2 simultaneously provide auxiliary wind in parallel or security personnel's wind with superfluous wind for many blast furnaces again making primary air fan, have saved equipment, have improved efficient;
As shown in Figure 7, when a blower fan 1 breaks down, when vacuum breaker 11 ends, variable valve 12 and quick-closing valve 13 standard-sized sheets, No. two blower fans 2 are simultaneously to a blast furnace 10 and No. two blast furnace 20 main air feeds, the quick-closing valve 33, the quick-closing valve 43 that are positioned at simultaneously on the auxiliary wind path are closed rapidly, and variable valve 32, variable valve 42 are also closed; Guarantee that No. two blower fans 2 are to a blast furnace 10 and No. two blast furnace 20 air feeds.
As shown in Figure 8, when No. three blower fans 3 break down, when vacuum breaker 31 ends, under Controlling System control, variable valve 32 and quick-closing valve 33 standard-sized sheets, No. two blower fans 2 are simultaneously to No. three blast furnaces 30 and No. two blast furnace 20 main air feeds, and the quick-closing valve 13, the quick-closing valve 43 that are positioned at simultaneously on the auxiliary wind path are closed rapidly, and variable valve 12, variable valve 42 are also closed; Guarantee that No. two blower fans 2 are to No. three blast furnace 30 air feeds.
Claims (5)
1, anti-slag and the air feed technology in parallel of irritating of a kind of blast furnace, it is characterized in that on the main air-supply pipeline of each blast furnace blower, auxiliary wind path being set, to lead air-supply pipeline and auxiliary wind path and be unified into the air feed pipe network, by Controlling System the air feed situation of each blast furnace is monitored, by switching and the timely relevant parameter of adjusting each blower fan to major-minor wind path, the blower fan of realizing other blast furnace is that the air feed amount of owing blast furnace is mended wind and in time is the blast furnace air-supply that fan trouble occurs.
2, anti-slag and the air feed technology in parallel of irritating of blast furnace according to claim 1 is characterized in that at least one typhoon machine passes through auxiliary wind path to other blast furnace air-supply under the Controlling System regulation and control in each blast furnace blower.
3, anti-slag and the air feed technology in parallel of irritating of blast furnace according to claim 2, it is characterized in that described Controlling System is by regulating the switching of quick-closing valve on the auxiliary wind path, realization realizes the adjusting of air quantity in the auxiliary wind path to the switching of major-minor wind path by the control to auxiliary wind path adjusted valve.
4,, it is characterized in that auxilliary air feed machine access air-supply pipe network is blown to each blast furnace by auxiliary wind path under Controlling System control according to claim 1 or anti-slag and the air feed technology in parallel of irritating of 2 or 3 described blast furnaces.
5, anti-slag and the air feed technology in parallel of irritating of blast furnace according to claim 4, it is characterized in that described Controlling System is by regulating the switching of quick-closing valve on the auxiliary wind path, realization realizes the adjusting of air quantity in the auxiliary wind path to the switching of major-minor wind path by the control to auxiliary wind path adjusted valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100438011A CN1837377A (en) | 2006-04-17 | 2006-04-17 | Slag-back prevention and parallel aeration process for blast furnace |
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| CNA2006100438011A CN1837377A (en) | 2006-04-17 | 2006-04-17 | Slag-back prevention and parallel aeration process for blast furnace |
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| CN1837377A true CN1837377A (en) | 2006-09-27 |
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| CNA2006100438011A Pending CN1837377A (en) | 2006-04-17 | 2006-04-17 | Slag-back prevention and parallel aeration process for blast furnace |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102051437A (en) * | 2010-12-30 | 2011-05-11 | 中国恩菲工程技术有限公司 | Air-supplying device for revolving furnace |
| CN102174665A (en) * | 2010-12-30 | 2011-09-07 | 中国恩菲工程技术有限公司 | Air supply control method for converter |
| CN102796837A (en) * | 2012-08-24 | 2012-11-28 | 北京首钢国际工程技术有限公司 | Device for preventing slag from entering into blast furnace tuyere |
| CN103409574A (en) * | 2013-08-26 | 2013-11-27 | 济钢集团有限公司 | Security air system for preventing slag from entering blast furnaces |
| CN109234480A (en) * | 2018-10-11 | 2019-01-18 | 联峰钢铁（张家港）有限公司 | A kind of blast furnace blower switches technique online |
| CN109487024A (en) * | 2018-12-25 | 2019-03-19 | 云南玉溪仙福钢铁（集团）有限公司 | Blast furnace gas and main air hose lead to net system |
-
2006
- 2006-04-17 CN CNA2006100438011A patent/CN1837377A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102051437A (en) * | 2010-12-30 | 2011-05-11 | 中国恩菲工程技术有限公司 | Air-supplying device for revolving furnace |
| CN102174665A (en) * | 2010-12-30 | 2011-09-07 | 中国恩菲工程技术有限公司 | Air supply control method for converter |
| CN102051437B (en) * | 2010-12-30 | 2013-11-13 | 中国恩菲工程技术有限公司 | Air-supplying device for revolving furnace |
| CN102174665B (en) * | 2010-12-30 | 2015-10-28 | 中国恩菲工程技术有限公司 | A kind of air feed control method for converter |
| CN102796837A (en) * | 2012-08-24 | 2012-11-28 | 北京首钢国际工程技术有限公司 | Device for preventing slag from entering into blast furnace tuyere |
| CN102796837B (en) * | 2012-08-24 | 2013-07-17 | 北京首钢国际工程技术有限公司 | Device for preventing slag from entering into blast furnace tuyere |
| CN103409574A (en) * | 2013-08-26 | 2013-11-27 | 济钢集团有限公司 | Security air system for preventing slag from entering blast furnaces |
| CN109234480A (en) * | 2018-10-11 | 2019-01-18 | 联峰钢铁（张家港）有限公司 | A kind of blast furnace blower switches technique online |
| CN109487024A (en) * | 2018-12-25 | 2019-03-19 | 云南玉溪仙福钢铁（集团）有限公司 | Blast furnace gas and main air hose lead to net system |
| CN109487024B (en) * | 2018-12-25 | 2024-02-09 | 云南玉溪仙福钢铁（集团）有限公司 | Blast furnace gas and main air pipe net system |
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