CN103114199A - Starting-up production method of sintering machine - Google Patents
Starting-up production method of sintering machine Download PDFInfo
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- CN103114199A CN103114199A CN2013100773734A CN201310077373A CN103114199A CN 103114199 A CN103114199 A CN 103114199A CN 2013100773734 A CN2013100773734 A CN 2013100773734A CN 201310077373 A CN201310077373 A CN 201310077373A CN 103114199 A CN103114199 A CN 103114199A
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Abstract
The invention provides a starting-up production method of a sintering machine. The starting-up production method comprises the following steps of: before starting-up production, laying a grate-layer material on an empty trolley before an igniter, and laying a wind stopping belt on the empty trolley after an igniter so as to stop wind from passing; when one third of a mixture exists in a buffer mine, starting up and distributing materials on the trolleys, controlling the speed of the sintering machine to 1.1-1.2m/min and the thickness of a sintered material layer to 400+/-20mm; igniting and sintering, wherein the mixture comprises fresh materials and return mines, the amount of the fresh materials accounts for 80%-90% of the fresh materials during normal production, the amount of the return mines accounts for 110%-120% of the return mines during normal production, the moisture content of the mixture is 7.4%-7.8%, and the temperature of the mixture is 65-70 DEG C. The starting-up production method has the advantages of realizing starting-up without stopping pumping and no-generation of lots of raw materials, improving the effective operating rate of the sintering machine and reducing the operating cost and power consumption caused by idling of a smoke extractor due to stopping of pumping of the sintering machine.
Description
Technical field
The present invention relates to field of metallurgy, more particularly, relate to a kind of production method that is applicable to the sinter machine start.
Background technology
The process when sinter machine of existing iron and steel enterprise works is: sinter machine makes belt sintering dolly loopy moving by power system, supply with the pallet raw material by giving the ore deposit part, then by lighter for ignition, the coke on raw materials for sintering surface is caught fire, when chassis moves, sintered material is burnt downwards by the surface under the smoke extractor suction function, complete sintering before reaching ore discharge part, and the agglomerate of generation is carried out fragmentation, cooling, deliver to the finished product system.
At the sinter machine start production initial stage, owing to leaking out and to avoid without what material formed on chassis, and then cause by the effective wind rate of the initial bed of material of starting shooting less, and adding that mixture temperature is low, the poor sintered material ventilation property that causes of granularity is poor, when making start produce, sintering velocity is slow.In prior art, the bellows turnover panels that partially sintered in each bellows of machine design and installation, can reach and solve the Air Leakage that start process forms without material on due to chassis by closing the bellows turnover panel when start tissue is produced, but because the bellows turnover panel has formed certain resistance to effective wind in normal productive process, be unfavorable for the raising of the stable and production capacity of production process, the factor of equipment failure simultaneously all makes sinter machine phase out most of bellows turnover panel.
When sintering machine wind box without turnover panel or part during without turnover panel, in order to ensure start initial stage sinter quality, must be in the situation that stop for a long time the operation of sinter machine and feeding system and carry out down draft sintering and (be called for short, stop pumping), so that sintered material is grilled thoroughly, operation is not only started shooting and is expected the poor quality but also increase running cost like this, has restricted sinter machine and has reached fast normal production.
Summary of the invention
For the deficiencies in the prior art, one of purpose of the present invention is to solve the one or more problems that exist in above-mentioned prior art.
When the object of the present invention is to provide the start of a kind of sinter machine to produce, be not at sinter machine and feeding system and carry out the working method that uninterrupted down draft sintering does not produce a large amount of raw material under run-stopping status.
To achieve these goals, the invention provides a kind of method that sinter machine start is produced.Said method comprising the steps of: before start is produced, the empty chassis upper berth grate-layer material before lighter for ignition, the empty chassis upper berth choke band after lighter for ignition is to hinder the air flow stream mistake; After maintaining 1/3 compound in buffering ore deposit groove, start and on the chassis cloth, controlling the sinter machine machine speed is 1.1～1.2m/min, sintering material layer thickness is 400 ± 20mm; Then light a fire and sintering; Wherein, described compound is comprised of virgin material and returning mine, when the virgin material amount be normal production 80～90% of the virgin material amount, when quantity of return mines be normally production 110～120% of quantity of return mines, the moisture content of described compound is 7.4%～7.8%, and the material temperature of described compound is 65～70 ℃.
An embodiment of the method that sinter machine start according to the present invention is produced, the ignition temperature in described lighting up procedure is 1050 ± 50 ℃.
An embodiment of the method that sinter machine start according to the present invention is produced, when forming described compound, the digestion water temp that adds is 80 ± 5 ℃.
An embodiment of the method that sinter machine start according to the present invention is produced, described choke band is made by the adhesive tape on conveyor drive.
An embodiment of the method that start is produced according to sinter machine according to the present invention, described choke band is made by the adhesive tape middle layer of removing after working face and non-working surface.
Compared with prior art, beneficial effect of the present invention comprises: solve the Air Leakage that chassis forms without material, start is produced not stop pumping and is not produced a large amount of raw material, sinter machine can reach normal production level fast, improved the sinter machine efficiency, the smoke extractor idle running power consumption that has reduced running cost and caused because of the sinter machine stop pumping.
Embodiment
Hereinafter, describe in connection with exemplary embodiment the method that sinter machine start according to the present invention is produced in detail.
The method that the sinter machine start is produced according to the present invention comprises following operation: before start is produced, grate-layer material and choke band are laid on the sky chassis to hinder the air flow stream mistake.Begin to be the exhausting section from lighter for ignition, in the situation that form a large amount of leaking out on chassis without expecting on chassis, leaking out on empty chassis causes the effective wind on other chassis that are furnished with sintered material to reduce, and then can reduce by the effective wind rate of sinter bed, do not have wind to carry out combustion-supporting and participate in heat exchange and the heat transmission, sintering process can't be carried out, so, by laying grate-layer material and choke band to form the barrier that hinders air-flow on chassis, the Air Leakage that solution forms without material due to chassis, and then the effective wind rate by sinter bed when increasing start.Because lighter for ignition is that semiclosed equipment personnel can not enter, near lighter for ignition, temperature is high in addition, and the operating personnel can not be close, thereby, take the empty chassis upper berth grate-layer material before lighter for ignition, the choke preparation work before the mode of the empty chassis paving choke band after lighter for ignition is started shooting.The choke band that adopts mainly plays the effect that hinders air-flow, for example, can adopt canvas commonly used in daily life as the choke band, perhaps, can adopt the old adhesive tape that the conveyor belt machine changes to be processed into voluntarily the choke band, because adhesive tape inside is to be produced through high pressure by nylon wire and glue, denser is taped against the effect that can reach the obstruction air-flow on chassis.For ease of carrying and Reusability, the working face of old conveyor drive and non-working surface can be removed, use the adhesive tape middle layer with two-layer nylon wire to produce special-purpose choke adhesive tape as start.
After maintaining 1/3 compound in buffering ore deposit groove, start and on the chassis cloth, controlling the sinter machine machine speed is that 1.1～1.2m/min (annotates: usually, the machine speed general control is advisable at 1.8～1.9m/min), sintering material layer thickness is that (annotate: usually, sintering material layer thickness is controlled to be 670 ± 20mm) to 400 ± 20mm; Then light a fire and sintering.Keep the ore deposit groove to have 1/3 groove material to begin again later on stone in the groove of buffering ore deposit and turn sinter machine, the one, prevent from cushioning the inhomogeneous problem of the very few cloth of ore deposit groove material, realize cloth and light a fire evenly; The 2nd, shorten sintered material in the time of buffering ore deposit groove stop, the extruding between the sintered material of avoiding causing due to residence time length and remaining unslaked lime continue digestion and cause breaking of bead to reduce the original ventilation property of sintered material.Thin sinter bed and reduction machine speed are in order to reduce bed of material resistance increment by the effective wind rate of the bed of material and to extend effective sintering time, poor sintered material carries out reaction process fully until grill thoroughly to make start initial stage ventilation property, can reduce to greatest extent at the start production initial stage generation of raw material like this, the assurance sintering process is even, improve the quality of products, reach the effect of not stop pumping.
Wherein, described compound comprises virgin material and returns mine, virgin material amount M when the virgin material amount is normal production
180～90%, quantity of return mines M when quantity of return mines is normal production
2110～120%.M
1, M
2Can adopt agglomerate raw material etc. to carry out calculative determination with known method according to sinter machine size, different manufacturers.For example, the sinter machine area that adopts of certain steel mill is 173.6m
2, the agglomerate raw material that adopts comprises v-ti magnetite concentrate, contains fine iron ore, fuel and flux (for example, Wingdale, unslaked lime etc.), virgin material amount M when it is normally produced
1Be 34～36kg/m, quantity of return mines M when normally producing
2Be 21～23kg/m.The moisture content of described compound is 7.4%～7.8% (notes: usually, the moisture content general control is 7.2%～7.4%), when forming compound, the digestion water temp that adds is 80 ± 5 ℃, the pre-heat mixture of second drum mixer is take the material temperature that improves the start compound as 65～70 ℃.Ignition temperature in described lighting up procedure is 1050 ± 50 ℃.
Reduce the virgin material ratio, increase the ratio of returning mine, can reach the effect that increases the balling-up of sintered material pelletizing core acceleration of sintering material, the sintered material balling ratio is high in having improved the original ventilation property of sintered material, compound system putty in the time of can preventing from starting shooting simultaneously; Improving sintered material moisture is 7.4%～7.8%, can improve sintering process heat exchange and heat transfer speed.The unslaked lime that is used for SINTERING PRODUCTION need to carry out heating water makes it that chemical reaction occur, the hot water temperature who adopts is called " digestion water temp ", the hot water assimilation of quicklime using that adds 80 ± 5 ℃ can improve the quicklime slaking speed of response, make unslaked lime emit fast a large amount of heats in reaction process and improve material temperature, eliminate simultaneously the sintering excessive moistening layer impact that mixture temperature causes lower than dew-point temperature.The sintered material balling-up has been got well, and material temperature has improved, and moisture content helps the heat and mass of sintering process, and coking property reaches the index that is beneficial to sintering process, namely can think the original ventilation property of having improved sintered material.Igniting was effective when ignition temperature was reduced to 1050 ± 50 ℃, prevented from that ignition temperature is too high to cause sintered material top layer material excessively to melt having formed closely knit sintering jamming of ore bed gas channel, destroyed the ventilation property of the bed of material.
Solve and do not produce a large amount of raw material under not stop pumping state, must solve simultaneously the original ventilation property problem that chassis leaks out without material and improves sintered material.Do not produce the necessary parameter of a large amount of raw material be under not stop pumping state and will reach in above-mentioned start operating parameters: virgin material amount, quantity of return mines, secondary moisture, machine speed, bed thickness, ore deposit groove material level, material temperature.Ignition temperature and digestion water temp are for arranging the better parameter of rear effect.
Below in conjunction with concrete example, one exemplary embodiment of the present invention are described.
In this example, certain sintering machine of steel mill start production stop pumping time average was at 15 minutes/time.Repeatedly utilize the rear start of sinter machine maintenance chance, implemented the application's method at certain sinter machine, concrete operations comprise:
(1), organize after having overhauled each system device to carry out the test run running, until total system reaches the interlock working condition.Simultaneously, the special messenger implements each son of exhausting system, vision slit, valve and must close tight.
(2), implement compound system whether water and air arranged, confirming has and keeps certain pressure just can carry out further work.Tissue turns the high pressure air pump and in strict accordance with the operation of lighting a fire of ignition procedure and coal gas operational requirement.Contact factory wants electricity in the operation department, and tissue turns smoke extractor until normal operation.
(3), all bellows of sinter machine close tight, complete grate-layer material and special-purpose choke adhesive tape is produced in start in the empty chassis of sinter machine.
(4), to compounding and burn cooling system all interlock concentrate and change trains or buses, organize material loading, second drum mixer uses power steam preheating sintered material to improve material temperature, sintering expects that keeping ore deposit groove material level after the groove of buffering ore deposit is to begin stone after 1/3 to turn sinter machine.Wherein, concentrating and change trains or buses to refer to that the equipment in the whole piece Production Flow Chart is in the running of carrying out under the collected state of mutual linking, is not the individual operation of any one equipment.Equipment before malfunction equipment can shut down automatically when equipment failure occurring like this.Its effect of second drum mixer that is used for SINTERING PRODUCTION is that sintered material is mixed again, makes sintered material reach granularity, moisture, temperature that SINTERING PRODUCTION needs.
(5), the start the initial bed of material should not be too thick, the control sintering material layer thickness is 400 ± 20mm, the bed of material must be paved, and avoids drawing ditch to cause charge level uneven, causes that charge level ventilation property difference is excessive.
(6), the sinter machine machine speed is controlled at 60% of normal running machine speed, opens one by one the bellows turnover panel of existence when having the material chassis to run to corresponding bellows.
(7), smoke extractor receives after the operation department opens the instruction of air door, according to air quantity, negative pressure and current conditions are opened air door gradually, electric current must not surpass 417A, should note fluctuation of current simultaneously, until run well.
Wherein, the start operating parameters is controlled with the parameter of normal running more as shown in table 1.
Table 1 start operating parameters is controlled and the parameter of normal running compares
Find through production test, thoroughly solved the necessary stop pumping problem of start after adopting the application, not only can save the production loss of the operating rate that stop pumping brings, and can reduce power cost, avoid the smoke extractor idle running power consumption that causes because of the sinter machine stop pumping.
(1), the production loss that reduces: calculate by 8 times with annual scheduled overhaul startup-shutdown, start production stop pumping time average was at 20 minutes/time, and material loading amount average out to 55kg/m increases production at present the 1t agglomerate and reduces by 100 yuan of process cost.
The sinter machine proportioning belt rotating speed 102m/min that adopts in above-mentioned example, 1t virgin material burn residual 0.83 calculating of pressing, and the correlometer formula is:
Output increment=virgin material * belt speed * total stop pumping time * 0.83/1000 * 100=55 * 102 * 160 * 0.83/1000 * 100=74500 (unit).
(2), save power cost: smoke extractor power 6300KW, idle running 160 minutes, 0.6 yuan of calculating of every degree electricity, every year is cost-saved is: 6300 * 160/60 * 0.6=10080 (unit).
Can find out, after using the application on a sinter machine, can obtain economic benefit and add up to: (74500+10080)/10000=8.46 (ten thousand yuan).
in sum, method of the present invention is by laying grate-layer material and choke band in pallet, to reduce start process due to leaking out without material formation on chassis, increase is by the effective wind rate of sinter bed, reduce simultaneously the virgin material ratio, increase the ratio of returning mine, the material temperature that improves sintered material moisture and improve the start material, reach the original ventilation property of improving sintered material, and control start key operation parameter, reach fast normal generation level after making the sinter machine start, start shooting not stop pumping and do not produce the organization of production effect of a large amount of raw material of realization, enhance productivity, alleviate workman's labour intensity, reduce production costs, have good economic benefit and social benefit.
Do not break away from although the above by having described the present invention in conjunction with exemplary embodiment, it will be apparent to those skilled in the art that the spirit and scope that claim limits, can carry out various modifications and change to exemplary embodiment of the present invention.
Claims (5)
1. the method that the sinter machine start is produced, is characterized in that, said method comprising the steps of:
Before start is produced, the empty chassis upper berth grate-layer material before lighter for ignition, the empty chassis upper berth choke band after lighter for ignition is to hinder the air flow stream mistake;
After maintaining 1/3 compound in buffering ore deposit groove, start and on the chassis cloth, controlling the sinter machine machine speed is 1.1～1.2m/min, sintering material layer thickness is 400 ± 20mm;
Then light a fire and sintering;
Wherein, described compound is comprised of virgin material and returning mine, when the virgin material amount be normal production 80～90% of the virgin material amount, when quantity of return mines be normally production 110～120% of quantity of return mines, the moisture content of described compound is 7.4%～7.8%, and the material temperature of described compound is 65～70 ℃.
2. the method for sinter machine start production according to claim 1, is characterized in that, the ignition temperature in described lighting up procedure is 1050 ± 50 ℃.
3. the method for sinter machine start production according to claim 1, is characterized in that, when forming described compound, the digestion water temp that adds is 80 ± 5 ℃.
4. the method for sinter machine start production according to claim 1, is characterized in that, described choke band is made by the adhesive tape on conveyor drive.
5. the sinter machine according to claim 4 start method of producing, is characterized in that, described choke band is made by the adhesive tape middle layer of removing after working face and non-working surface.
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Cited By (5)
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| CN103744345A (en) * | 2014-01-26 | 2014-04-23 | 深圳市劲拓自动化设备股份有限公司 | Initialization method and system for starting up of sintering furnace controller |
| CN104792176A (en) * | 2015-04-07 | 2015-07-22 | 马钢(集团)控股有限公司 | Device and method for starting production of belt type sintering machine |
| CN107699684A (en) * | 2017-09-04 | 2018-02-16 | 鞍钢集团工程技术有限公司 | A kind of method of sintering machine start production |
| CN112880423A (en) * | 2021-01-26 | 2021-06-01 | 广东韶钢松山股份有限公司 | Method for controlling shutdown and startup in sintering machine overhauling process |
| CN114625096A (en) * | 2022-04-19 | 2022-06-14 | 江苏省镔鑫钢铁集团有限公司 | Dynamic equilibrium control method for material level of sinter mixture ore tank |
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| CN107699684A (en) * | 2017-09-04 | 2018-02-16 | 鞍钢集团工程技术有限公司 | A kind of method of sintering machine start production |
| CN112880423A (en) * | 2021-01-26 | 2021-06-01 | 广东韶钢松山股份有限公司 | Method for controlling shutdown and startup in sintering machine overhauling process |
| CN112880423B (en) * | 2021-01-26 | 2021-11-16 | 广东韶钢松山股份有限公司 | Method for controlling shutdown and startup in sintering machine overhauling process |
| CN114625096A (en) * | 2022-04-19 | 2022-06-14 | 江苏省镔鑫钢铁集团有限公司 | Dynamic equilibrium control method for material level of sinter mixture ore tank |
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