CN102220485A - Sintered vanadium-titanium magnetite concentrate quick full production method for large sintering machine - Google Patents
Sintered vanadium-titanium magnetite concentrate quick full production method for large sintering machine Download PDFInfo
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Abstract
The invention discloses a sintered vanadium-titanium magnetite concentrate quick full production method for a large sintering machine, which comprises: sintering under conditions of a negative pressure of over 15,000 Pa and an air volume per unit area of the sintering machine of 100 to 110 m<3>/(m2.min); performing improved design of related equipment with serious problems of the large sintering machine, and after construction, and performing cold-state trial run and hot-load trial run and handling problems encountered in cold-state trial run and hot-load trial run; and performing sintering production by reinforced sintering processes such as controlling a material mixing ratio and improving temperature of mixed materials. The method disclosed by the invention is applicable to large sintering machine of sintered vanadium-titanium magnetite concentrate, can make newly constructed large sintering machine for sintered vanadium-titanium magnetite concentrate reach design productivity quickly, and can improve the productivity of the sintering machine.
Description
Technical field
The present invention relates to field of metallurgy, more particularly, relate to a kind of large-type sinterer sintering v-ti magnetite concentrate and reach the product method fast.
Background technology
Sinter machine develops towards the maximization direction both at home and abroad at present, and trend has been inevitable.Sinter machine maximizes can reduce investment and maintenance cost, reduce the agglomerate cost, improve the quality and reduce consumption, realizes environmental friendliness.Present domestic 360m
2Sinter machine built up with at the cover of building that has more than 20, but do not have a cover based on the sintering high-Ti type V-Ti magnetite concentrate, the practical situation difference of each factory reaches product and reaches required time and the design requirements of effect and also be not quite similar.Certain 360m of Iron And Steel Company
2Sinter machine is based on Ti type V-Ti magnetite concentrate in the sintering, its TiO
2Content has only about 6%, and fine size,＜200 order grain size contents be more than 80%, the 360m of the said firm
2Sinter machine go into operation the back because of problem long-term effect such as flexible transmissions reach product.And the v-ti magnetite concentrate TiO of China's Panzhihua Region
2Content is up to more than 13%, its coarse size, and＜200 order grain size contents only about 50%, granulating efficiency is poor, and compound size composition is poor, and the sintered material ventilation property is bad, is restricting the raising of yield and quality.
In order to satisfy blast furnace production capacity demand, improve sintering overall technology and equipment, certain Iron And Steel Company implements sintering system complete upgrading technological transformation by stages and in groups, the first step the is newly-built first cover 360m
2Sinter machine, design level are utilization coefficient 1.30t/m
2H, operating rate 96%, tumbler index built up and to reach product (reaching design level) in back 7 months on June 2nd, 72%, 2009; Newly-built the 2nd cover 360m of second step
2Sinter machine, design level is identical with first cover, on December 20th, 2010 was constructed and put into operation, go into operation and promptly met and exceeded design level in back 16 days, and reach and enter the stable high yield stage steadily in postpartum, started large-type sinterer sintering high-Ti type V-Ti magnetite concentrate and reached the fastest historic records of product,, reached the product technology 360m in the common ore deposit of sintering at home fast as the sinter machine of present southwest maximum
2Level also is in a leading position in the sinter machine.
The sintering zone of a lot of enterprises is because geographical conditions limit, and the physical features drop is big, and it is narrow to build area, buildings, structures bulkfactor are big, cause on-the-spot technical process from traversed by mistake, complicated layout, logistics is not smooth, gives organization of production and reaches to produce and caused great difficulty.For overcoming these unfavorable factor influences, certain Iron And Steel Company adopts large-type sinterer sintering high-titanium type vanadium-titanium magnetite concentrate, has formed a whole set of and has realized reaching fast the innovative approach of product.
Summary of the invention
At the deficiency that prior art exists, the invention provides a kind of be applicable to newly-built large-type sinterer sintering high-Ti type V-Ti magnetite concentrate reach the product method fast.
What an aspect of of the present present invention provided a kind of large-type sinterer sintering v-ti magnetite concentrate reaches the product method fast.The described product method that reaches fast comprises: in negative pressure is more than the 15000Pa and sinter machine unit surface air quantity is 100～110m
3/ (m
2Min) carry out sintering under the condition; At large-type sinterer most common failure, accident described sinter machine is improved design and improves construction, installation quality, the accident rate after reducing it and going into operation; Described large-type sinterer is carried out cold conditions test run and thermal load test run, and handle the problem that occurs in described cold conditions test run and the thermal load test run; Adopt intensified-sintered technologies such as control ratio of components and raising mixture temperature to carry out SINTERING PRODUCTION.
What another aspect of the present invention provided a kind of large-type sinterer sintering v-ti magnetite concentrate reaches the product method fast.The described product method that reaches fast comprises: in negative pressure is more than the 15000Pa and sinter machine unit surface air quantity is 100m
3/ (m
2Min)～110m
3/ (m
2Min) carry out sintering under the condition, overcome v-ti magnetite concentrate coarse size, poor, the ventilation property defect of bad of pellet performance; Described large-type sinterer is carried out cold conditions test run and thermal load test run; Adopt intensified-sintered technology to carry out SINTERING PRODUCTION, described intensified-sintered technology is meant for sinter machine configuration sintered material the time, by weight percentage, with addition of common rich ore powder 20%～40%, outside join return mine 35%～45%, with addition of unslaked lime 5-8%, and mixture moisture is controlled to be 7.5 ± 0.2%, fixed carbon is controlled in 2.8%～3.3% the scope, mixture temperature is increased to more than 60 ℃.
According to the product method that reaches fast of the present invention, the area of described large-type sinterer can be 180m
2More than.
According to the product method that reaches fast of the present invention, the described product method that reaches fast also can comprise: the structure to the big lime-slaking table feeder of sinter machine production influence degree is improved, so that described lime-slaking table feeder can continue to provide 6%～8% unslaked lime by weight percentage for each batching of sintering process.
According to the product method that reaches fast of the present invention, described cold conditions test run can comprise that the Solo test run and the time of interlock test run and described cold conditions test run were not less than 72 hours; The time of described thermal load test run was not less than 48 hours.
According to an aspect of the present invention reach the product method fast, described intensified-sintered technology can comprise: for sinter machine configuration sintered material the time, by weight percentage, with addition of common rich ore powder 20%～40%, outside join return mine 35%～45%, with addition of unslaked lime 5-8%, and mixture moisture is controlled to be 7.5 ± 0.2%, fixed carbon is controlled in 2.8%～3.3% the scope; Mixture temperature is increased to more than 60 ℃.
According to the product method that reaches fast of the present invention, main exhauster throttle opening 〉=60% of described sinter machine, negative pressure 〉=15000Pa.
According to the product method that reaches fast of the present invention, the equipment of described large-type sinterer generation most common failure, accident can comprise one or more in conveyor, main exhauster, mixing machine, single roll crusher, aggregate feeder units, the central cooler, and to design of the described equipment property improved and raising installation quality.
According to the product method that reaches fast of the present invention, the main raw material of described large-type sinterer is a v-ti magnetite concentrate, and the composition of described v-ti magnetite concentrate can contain TFe 52%～56%, FeO 29%～33%, SiO by weight
22.5%～4.5%, CaO 1.5%～2.2%, MgO 2.0%～3.2%, Al
2O
33.0%～4.5%, V
2O
50.5%～0.65%, TiO
210%～15%, S 0.4%～0.6%, and the impurity of surplus and can contain in the described v-ti magnetite concentrate＜particle 40%～60% of 200 order grades by weight percentage.
Compared with prior art, method of the present invention is applicable to the large-type sinterer of sintering high-Ti type V-Ti magnetite concentrate, can make the newly-built large-type sinterer that is used for the sintering v-ti magnetite concentrate quick (for example, 16 days) reach the design production capacity, and can improve the output of sinter machine.
Although pointed out detailed content of the present invention above, and below with regard to specific implementation with combine exemplary embodiment and described the present invention, but those skilled in the art should be clear, under the prerequisite of the spirit and scope that do not break away from claim, can carry out various modifications and change to exemplary embodiment, it is that main newly-built large-type sinterer reaches product fast that the inventive method is equally applicable to the common powdered iron ore of sintering.
Embodiment
The product method that reaches fast according to large-type sinterer sintering v-ti magnetite concentrate of the present invention comprises: in negative pressure is more than the 15000Pa and sinter machine unit surface air quantity is 100～110m
3/ (m
2Min) carry out sintering under the condition; Described large-type sinterer is carried out cold conditions test run and thermal load test run, and handle the problem that occurs in described cold conditions test run and the thermal load test run; Adopt intensified-sintered technologies such as control ratio of components and raising mixture temperature to carry out SINTERING PRODUCTION.
Specifically, the reaching the product method fast and can realize in the following manner of large-type sinterer sintering v-ti magnetite concentrate of the present invention:
A: adopt 180m
2The large-type sinterer sintering v-ti magnetite concentrate of above area, described sinter machine adopts the big air quantity sintering of high negative pressure, and specifically, negative pressure is more than the 15000Pa, and sinter machine unit surface air quantity is 100～110m
3/ minm
2Thereby, overcome v-ti magnetite concentrate coarse size, poor, the ventilation property defect of bad of pellet performance;
B: at large-type sinterer most common failure, accident described sinter machine is improved design and improves construction, installation quality, the accident rate after reducing it and going into operation; And in cold conditions test run and thermal load test run stage processing variety of issue and hidden danger;
C: described sinter machine is constructed and put into operation and takes the reinforcing process technological method to promote it to reach product fast.
In one embodiment of the invention, equipment design portative power and the unmatched defective of virtual rating that described large-type sinterer of the present invention exists are improved design, enlarge its carrying capacity, eliminate the insufficient problem of design loading.
In one embodiment of the invention, described large-type sinterer of the present invention is carried out structure, size and carrying capacity improvement design to the key equipment lime-slaking table feeder that influence reaches product, enlarge the ability of its digestion process unslaked lime, improve its digestion effect.
In one embodiment of the invention, need carry out Solo test run and interlock test run after described large-type sinterer builds up, time installation was not less than 72 hours, concentrated elimination problem and hidden danger; Feeding intake need be not less than 48 hours thermal load test run after the igniting, concentrates elimination problem and hidden danger.
In one embodiment of the invention, the reinforcing process technique means of taking after described large-type sinterer is constructed and put into operation is for by weight percentage, and with addition of common rich ore powder 20-40%, the outer ratio 35-45% that returns mine that joins of control uses unslaked lime 5-8%; Improve more than the mixture temperature to 60 ℃; Mixture moisture is controlled to be 7.5 ± 0.2%, and fixed carbon is controlled at 2.8-3.3%.
In one embodiment of the invention, main exhauster throttle opening 〉=60% of described sinter machine, negative pressure 〉=15000Pa.
In one embodiment of the invention; the equipment of the more easy generation stopping accident of the problem of described large-type sinterer can be conveyor, main exhauster, mixing machine, single roll crusher, aggregate feeder units, central cooler etc., and the property improved design is closed with the raising installation quality.
In one embodiment of the invention, work out preparation works such as operation or work standard and production preparation scheme, thermal load test run scheme, accident emergency processing prediction scheme before the described large-type sinterer operation meticulously, organization of production is orderly when making operation, and situation avoids confusion.
In one embodiment of the invention, the component content (by weight) of the main raw material v-ti magnetite concentrate of described large-type sinterer use contains: TFe 52-56%, FeO 29-33%, SiO
22.5-4.5%, CaO 1.5-2.2%, MgO 2.0-3.2%, Al
2O
33.0-4.5%, V
2O
50.5-0.65%, TiO
210-15%, S 0.4-0.6%.
In sum, technical problem to be solved by this invention provides a whole set of newly-built large-type sinterer sintering high-Ti type V-Ti magnetite concentrate and reaches the product method fast.
Below in conjunction with certain 360m of steel mill
2Sinter machine is embodiment, specifies particular content of the present invention and composition.
[1] at the material characteristic and the sintering characteristic of vanadium titano-magnetite, described large-type sinterer adopts high negative pressure and big air quantity sintering.
Agglomerate output is directly proportional with air quantity, and fan delivery is directly proportional with negative pressure, improve output and must improve negative pressure, increases air quantity.360m
2The large-type sinterer design time take into full account the Panzhihua Region sea level elevation high with v-ti magnetite concentrate coarse size, pellet performance is poor, ventilation property is bad characteristics, intensified-sintered from equipping, adopted the big air quantity sintering of high negative pressure, fan delivery 2 * 19800m
2/ min, negative pressure 16500Pa, sinter machine unit surface air quantity is 110m
3/ minm
2, and domestic common ore deposit sintering unit surface air quantity is 80-90m
3/ minm
2This just fundamentally overcomes the defective of schreyerite sintering deficiency in draught.
High-Ti type V-Ti magnetite concentrate has coarse size, the characteristics of pellet performance difference, and sinter mixture fine size, Flos Bombacis Malabarici concentrate are advises firm spherical shape, and specific surface area is 491.17cm only
2It is too thin that/g, concentrate are directly used in sintering, and it is too thick again to be used for granulating, its adhesive power on the karyosome extremely a little less than, so balling-up extreme difference.The concentrate proportioning was up to 40-80% during certain steel mill produced, and under the situation of no unslaked lime and binding agent, after two sections mixing ,+3mm only accounts for 35%, and as the rich ore of granulation core with return mine in+3mm just account for 25～30%.Therefore after secondary mixed, concentrate only sticked on the karyosome on a small quantity.After strengthening moisture, balling-up makes moderate progress, but the poor heat stability of material grain, at drying stage, because of being subjected to mechanical presses and the effect of heat-flash air-flow, concentrate comes off from karyosome, and ventilation property is worsened more.Field mix material test result shows that after taking various reinforcement granulation measures, wet compound thousand dry back+3mm grades reduce about 10%, illustrate that its thermostability is very poor.Balling-up extreme difference and poor heat stability have caused the ventilation property of the sintering process bed of material poor, and resistance is big, and the air quantity of the air quantity that passes through is few, and sintering velocity is slow, has a strong impact on yield and quality.
[2] described large-type sinterer is broken through equipment design portative power and the unmatched defective of virtual rating in the design and installation stage, reduces rate of breakdown.
In conjunction with present 360m
2Sinter machine and above sinter machine thereof (comprise domestic and certain first cover 360m of our department of steel mill
2Sinter machine) the insufficient problem of design loading, these problems mainly show: (1) belt system power of motor deficiency, cause press stop, step-down gear damage etc.(2) single roller excess load speed reduction unit damages.(3) smoke extractor excess load tripping operation.(4) mixing machine fluid coupling leakage of oil, the gear ring vibration.(5) the miscellaneous equipment overload is shut down or the like.
In the design phase design loading is adjusted again for this reason, enlarged carrying capacity, reduce when producing and shut down because of underload.Only provide equipment and the link that goes wrong at this, and technical scheme, particular content and the design variable etc. that improve design are not provided,, and belong to the specialty of design department because this is not a problem to be solved in the present invention.The present invention only need point out and provide to exist design loading and the unmatched concrete equipment of actual load and link to get final product.
[3] Solo test run and interlock test run stage after described large-type sinterer construction is finished, time installation was not less than 72 hours, concentrated elimination problem and hidden danger.
In order to check designing quality, construction quality, installation quality is built and is finished the back each flow process, each equipment are carried out unit, interlock test run, and on-load turns round, and the time was not less than 72 hours.Find variety of issue and defective in this stage, propose reform advice, formulate Abarbeitungsmassnahme, focus on after the shutdown, problem is eliminated before operation.To the installation quality and the test run important mornitoring of main equipment sinter machine, smoke extractor, mixing machine, central cooler, single roll crusher, discovering device type selecting, workmanship defective and installation quality defective are are in time rectified and improved early, do not bring production with problem.
The problem that certain other sinter machine occurs is these links and equipment not necessarily, only provides a kind of method at this.
[4] carry out the thermal load test run that is not less than 48 hours before the formal production of described large-type sinterer, focus on defective after the shutdown.
Described large-type sinterer builds up back idling lotus test run can find, find the most tangible problem and defective, but deeper problem only feeds intake, igniting, down draft sintering, carries out that thermal load test run (trial production) could expose and discovery.As an embodiment, certain the 2nd cover 360m of steel mill
2After machine builds up, carried out thermal load trial production after the test run of idling lotus immediately 2 days, a large amount of problems occurred, then shut down concentrate disappear scarce.
Restricted link carried out disappear scarcely, at the back accident of going into operation more plate belt feeder, 11 rollers, single roller, shuttle-type belt and batching disk etc. have taken place and carried out repeatedly rushing to repair with disappearing to lack and handle, various continuity serious accidents reduce.
The problem that certain other sinter machine occurs is these links and equipment not necessarily, only provides a kind of method at this.
[5] the key equipment----lime-slaking table feeder that described large-type sinterer influence is reached product carries out design improvement, and emphasis is followed the tracks of its construction and installation quality.
Unslaked lime is a kind of sinter agent, generally is suitable for both at home and abroad, and iron ore is granulated and sintering has decisive role to strengthening, especially v-ti magnetite concentrate.Unslaked lime must be joined the professional equipment that the device that disappears is an assimilation of quicklime using through its effect of digestion back competence exertion, if its designed capacity deficiency, the unreasonable and installation quality of scantlings of the structure does not pass a test, the then unslaked lime shutdown that can not fully digest or break down.According to each sinter machine experience in the past, with a 360m
2Sinter machine is embodiment, and the subject matter of joining the device existence that disappears is: (1) designed capacity is less than normal, unreasonable structure, and the strand cage is stuck, and blade falls, and screw shaft is disconnected.(2) design of unslaked lime ore deposit groove obliquity is unreasonable, unslaked lime canopy groove, ore deposit groove putty.(3) the ore deposit groove is unreasonable down to the feed opening design that spiral claims, not blanking of unslaked lime or blanking amount are excessive.(4) join the device water-adding system that disappears and to control amount of water.Weighing section rocked when (5) the unslaked lime helix balance moved, and the weighing signal fluctuation is big, can't drop into automatically.Certainly other sinter machine to join the problem that device faced that disappears may not be these links, only provide a kind of method at this.
Because it is design and installation question cause unslaked lime normally not use, very big to producing influence.At these problems, at an embodiment, as certain the 2nd cover 360m of steel mill
2Sinter machine has carried out improving design to joining the device link that disappears, and has improved structure, has enlarged and has joined the device size that disappears, and has strengthened portative power.Accident such as avoided putty after the operation, get stuck begins to join 5%-8% unslaked lime from operation and can keep abundant digestion, has created strong condition for reaching fast to produce, and we can say that the normal operation of lime-slaking table feeder has decisive role to reaching to produce.
[6], and strict control, check and accept installation quality to the equipment property the improved design of the more easy generation stopping accident of described large-type sinterer problem.
In conjunction with certain first cover 360m of steel mill
2Sinter machine is the subject matter that an embodiment exists, at the second cover 360m
2When sinter machine is built these problematic equipment are carried out design improvement and improvement is installed.Because the equipment and the link that relate to are a lot, only provide and improve one's methods improving design process, and do not relate to concrete design and parameter, because it is different for the problem that different sinter machines may face with link to need to improve the concrete equipment that designs.
These equipment and problem can maybe may be:
(1) belt system
The technical process of SINTERING PRODUCTION almost is connected by adhesive tape conveyor with the logistics transportation and finishes, according to experience adhesive tape conveyor in the past is that the easiest having an accident influences the link of operating rate, mainly exist belt system operation logistics to have some setbacks, main flaw belt specification (thickness and the line number of plies) can not satisfy the big load transport needs of high temperature, off size reason, technology controlling and process is inharmonious, apparatus failure etc., causing frequent putty, binder, burning belt, stroke belt, disconnected belt, is the most important reason that causes that sinter machine zero stops.Strengthening belt specification, load in the design and installation stage, expansion flaw size guarantees that material is unimpeded for this reason.
(2) smoke extractor
Smoke extractor is one of sintering main equipment, and sintering institute required airflow is finished by the suction of this equipment entirely.360m
2The main air blower of sinter machine is by two smoke extractors, twin flue, high negative pressure, big air quantity rotor, because design reasons, the subject matter of existence is: A, two smoke extractors are unbalanced to the distribution of sintering machine wind box number, cause string wind; B, smoke extractor tripping operation start and the difficulty of stopping; C, smoke extractor throttle opening and air quantity linear relationship are poor.When air door reaches 60% left and right sides, increase aperture again, air quantity and negative pressure all do not increase, and cause person in charge's negative pressure that downtrending is arranged, and about actual suction pressure 14200Pa, specified negative pressure 16500Pa greatly differs from each other with blower fan, has limited the raising of output.
At two large flue bellows string wind problems, make, installed the bellows dividing plate, improve sinter machine cold blast valve and large flue switching valve.Smoke extractor electric loop, automatic control are debugged and rectified and improved with mechanism.
(3) second drum mixer: subject matter is the fluid-flywheel clutch leakage of oil, and the fluid-flywheel clutch fusible plug washes out, and two mix the gear ring sealing is covered with problems such as abnormal sound, sprinkler pipe installation quality, needs the monitoring operation.Improve one's methods is to watering beam, steam branch pipe, sprinkler system fabrication and installation again, reinforcing; Mix to two that fluid-flywheel clutch leakage of oils, coupling device fusible plug wash out, the mixing machine gear ring is rectified and improved.
(4) single roll crusher
Single roll crusher subject matter is that the load design can be not enough, and overload operation causes the step-down gear high speed shaft to damage.Innovative approach is that step-down gear expands energy.
(5) aggregate feeder units
The batching feeding machine comes out in trial production gradually, to designing unreasonable and installation question, has carried out following improvement:
(1) the little cover spacing of adjustment concentrate and rich ore disk and ore deposit groove.
(2) snail sleeve liner improves, and disk feeder adopts electrodynamic mechanical type can regulate bed of material control gate.
(3) the disk measure control changes list into by the disk speed regulating control by the dual signal regulation and control, and the electronic scale belt speed is fixed.
(4) speed control by frequency variation of the fine ore disk of low discharge is big by changing for a short time, and snail cover interior diameter changes little simultaneously.
The problem that certain other sinter machine occurs is these links and equipment not necessarily, only provides a kind of at this
Method.
[7] after described large-type sinterer is constructed and put into operation, take measures in time to improve the material temperature.
Large-type sinterer comprises 360m at present
2Hot riddler's skill has all been cancelled in the sinter machine design, does not have the hot returning ore preheating, with an embodiment, and certain second cover 360m of steel mill
2Sinter machine operation back several days, mixture temperature has only 30-40 ℃, for improving the influence of material temperature elimination excessive moistening layer, in time take measures to increase the power steam consumption, improve the temperature that two batch mixings, mix hot water, join the device digestion water that disappears, improve mixture temperature, make the material temperature reach 60-75 ℃ with this.This measure is that intensified-sintered process increase material loading amount raising output has been created condition.The situation that certain other sinter machine faces may be different, but no matter take which kind of measure, all mixture temperature must be brought up to more than 60 ℃, eliminates the influence of the most basic excessive moistening layer, can reach 80-100 ℃ certainly better.
[8] after described large-type sinterer is constructed and put into operation, rationally control key process parameter, reduce and explore adaptation time, reduce and produce fluctuation.
Draw an embodiment, as certain first cover 360m of steel mill
2The problem that sinter machine is gone into operation and occurred is at another embodiment, as the same second cover 360m of steel mill
2Sinter machine in time is controlled at zone of reasonableness with the bed of material, machine speed, spent air temperture, moisture, fixed carbon, the proportioning of returning mine after going into operation, and reduces the process that adapts to, takes an unnecessary way of exploring.7.5 ± 0.2%, fixed carbon is controlled at 2.8-3.3% with the key parameter moisture controlled, has improved mixture granulation, eliminates the sintering heat defect of insufficient, and agglomerate visual appearance and yield rate are greatly taken on a new look, and does not go out the ready-made article material phenomenon for returning mine entirely.
[9] after described large-type sinterer was constructed and put into operation, various processing units were in break-in, testing stage, and the raw material that sinter machine uses needs rational ore matching, improves material structure, improves sintering character.
With an embodiment, certain second cover 360m of steel mill
2After sinter machine is constructed and put into operation, for pellet performance and the sintering characteristic that improves v-ti magnetite concentrate,, used the unslaked lime of 5-8% to strengthen granulation in the raw materials for sintering in the weight percent machine, use the common rich ore powder of 30-40% to improve compound size composition, reduced the sintering fusing point.By the allotment of returning mine of full factory, join the ratio of returning mine outward and be increased to 35-40%, for improving the compound granularity, improving the bed of material and create conditions by 20-25%.This is the prerequisite that promotes to reach fast product.
[10] work out operation or work standard, production preparation scheme before described large-type sinterer is gone into operation meticulously.
Described large-type sinterer is being built even the design phase, the relevant rules and the operation or work standard of the described large-type sinterer of establishment revision before it is gone into operation, need work out the equipment repair and maintenance rules as an embodiment, the post regulations for technical operation, safety regulation for operations and various operation or work standard, operation is had regulations to abide by, serious process discipline.Work out production preparation scheme before the operation meticulously, sinter machine thermal load test run scheme, accident emergency is handled preparation works such as prediction scheme, and organization of production is orderly when making operation, and situation avoids confusion.
It is may situation different for different sinter machines below to reach the problem that exists in the equipment and flow process in the product method or defective fast, but does not hinder enforcement and the application that reaches the product method fast.
With an embodiment, promptly 360m overlaps in certain steel mill second below
2Sinter machine specifies and uses described method of the present invention and carry out design, construction, installation, test run, operation, reach the concrete mode of product fast.
This cover machine breaks ground on February 20th, 2010 and goes into operation, and through 304 days construction, the thermal load test run was carried out in the igniting that feeds intake on December 20th, 2010, and the completion of being completed on the 21st is formally put into production.According to the start that pre-establishes with reach the product scheme and carry out to reach and produce tackling key problem work, in less than one month, reach product smoothly, reached product on the 16th day comprehensively, utilization coefficient was up to 1.381t/m in the 24th day
2.h, operating rate is the highest by 100%, and tumbler index is up to 73.61%.
[1] sets up start organization of production system.
For guaranteeing the second cover 360m
2Sinter machine is gone into operation smoothly, and it is up to standard to reach product early, and the production that special establishment is group leader with factory director is prepared and reached product tackling key problem leading group.
[2] feed intake produce before preparation work.
(1) interlock test run.Behind the Solo test run, idling lotus interlock test run 72 hours confirms to possess the condition of feeding intake.
(2) metering outfit inspection, demarcation.The demarcation to metering outfit in preceding 2 days of going into operation, the school inspection.
(3) electric, instrument, industrial computer inspection.Go into operation and checked whether electric, instrument, computer have satisfied production requirement in preceding 2 days.
(4) energy medium is confirmed.Go into operation and to detect, confirm that water, electricity, gas (steam, calm the anger, coal gas etc.) are unimpeded in preceding 2 days, possess working condition, reach working condition requirement.
(5) lighter for ignition baker.The necessary oven drying of new lighter for ignition, it is slow that heat-up rate is wanted, and the heating-up time will be grown, and makes the moisture evaporation fully lentamente in the refractory materials, and drastic deformation or damage do not take place in ignition furnace.Furnace drying time 80 hours.
[3] commissioning test run scheme.
(1) crude fuel is prepared.
Whether the preceding belt system of checking of the production that feeds intake carries the crude fuel flow process unimpeded, powder in the crude fuel Australia breeze that the said firm uses always, the high powder of state, the state (these three kinds are the iron ore rich ore powder), Wingdale, coke powder, cold returning mine shift to an earlier date 12 little fashion materials at proportioning room ore deposit groove, v-ti magnetite concentrate is 4 little fashion materials in advance, and each ore deposit groove material level is not less than 1/2; Unslaked lime defeated ash charging in 6 hours in advance.
(2) material loading amount and proportioning are determined.
Contrast the current first cover 360m
2The condition of production of sinter machine is determined the second cover 360m
2The material structure of sinter machine, for example:
Material structure: powder 6%+ unslaked lime 7%+ Wingdale 7.5%+ coke powder 6%+ returns mine 25% in the concentrate 41%+ Australia breeze 12%+ state high powder 21%+ state, according to practical situation, new sinter machine is gone into operation initial, and the smoke extractor air door generally is difficult to end, proportioning room material loading amount can not be too much, proceeds in two phases:
The first step: no grate-layer material material loading amount: material loading amount: virgin material (various crude fuel weight and, do not comprise cold returning mine) this time in step of the cold 40kg/m of returning mine of 50kg/m+ (this section period does not have dedusting ash) is very short, probably produces about 4 hours grate-layer material and can tell;
Second step: grate-layer material material loading amount is arranged: the material loading amount: the cold 55kg/m+ of the returning mine dedusting ash of virgin material 65kg/m+ 3kg/m (25kg/m wherein returns mine under the ditch)
(3) agglomerate composition: TFe48.50%, SiO
25.78%, Ro 2.35 (doubly), FeO 7.8 ± 0.5%.
[4] determine the sintering process parameter parameter.
(1) bed of material: 650mm during no grate-layer material, 620mm when grate-layer material is arranged;
(2) machine speed: 1.6-2.0m/min;
(3) grate-layer material thickness: 20-40mm;
(4) negative pressure: be as the criterion about 16200Pa as possible with full trrottle;
(5) spent air temperture: grill thoroughly with tail and to be as the criterion 120-150 ℃;
(6) gas using quantity: about 2000m
3/ h, reality is decided according to ignition temperature;
Air consumption: about 10000m
3/ h, reality is decided according to gas using quantity, and air-fuel ratio is 4: 1;
(7) ignition temperature: 1050 ± 50 ℃;
(8) mixture moisture: 7.5 ± 0.2%;
(9) compound fixed carbon: 3.2 ± 0.2% (note: the operation initial stage is by upper limit controls)
(10) compound＞3.0mm grade: reach more than 75%;
(11) mixture temperature: 50-60 ℃;
(12) mixing time: one mixes 2.9min, and two mix 4.1min;
(13) agglomerate cooling time: 〉=60min;
(14) finished product agglomerate temperature :≤150 ℃;
[5] commissioning test run.
According to the commissioning test run on sinter machine of above method, according to the trial production situation proportioning and processing parameter are constantly adjusted, make it to adapt to more v-ti magnetite concentrate sintering characteristics, production is entered fast reach the product level.
[6] engineering disappears scarce.
Produce as a trial after 2-3 days, according to the problem that comes out in the trial production stage, sinter machine is shut down, and focuses on various problems that come out and defective, and the scarce time that disappears is decided general 10-36 hour with severity on problem.
[7] formal production reaches design level.
After the sinter machine defective handled, feed intake once more and formally produce, continue to optimize processing parameter during this period; Progressively increase the material loading amount, improve negative pressure, increase air quantity, progressively improve unit-hour output and utilization coefficient.
According to above product method and the specific implementation of reaching fast, at certain second cover 360m of steel mill
2Implement on the sinter machine, this cover sinter machine design level is: utilization coefficient 1.30t/m
2H (unit-hour output 468t/h), month operating rate 96%, agglomerate tumbler index 72.5%.
This cover sinter machine is completed to complete on December 21st, 2010 and formally puts into production.Reach product progress and index after the operation and see Table 1, this shows:
Go into operation back the 9th day of operating rate is up to standard, is 99.10%, super design level 3.10%;
Go into operation back the 15th day of tumbler index is up to standard, is 72.52%;
Utilization coefficient the 16th day is up to standard, is 1.310t/m
2H, super design level 0.01t/m
2H, the same day, operating rate 100%, tumbler index 72.57%, this day, three indexs were simultaneously up to standard, and realized reaching fixing product on the production history of this cover sinter machine in the back of promptly going into operation on the 16th day comprehensively.
Reach product fast and be in advanced level at home, with the first cover 360m
2Sinter machine relatively, reaching the product time has shortened 6.5 months.This overlaps 360m
2Sinter machine reaches postpartum, and by Technology optimization tackling key problem, utilization coefficient is constantly bettered a record.
Certain second cover 360m of steel mill of table 1
2Sinter machine reaches product progress and main economic and technical indices
Claims (9)
- A large-type sinterer sintering v-ti magnetite concentrate reach the product method fast, it is characterized in that the described product method that reaches fast comprises:In negative pressure is more than the 15000Pa and sinter machine unit surface air quantity is 100m 3/ (m 2Min)～110m 3/ (m 2Min) carry out sintering under the condition, overcome v-ti magnetite concentrate coarse size, poor, the ventilation property defect of bad of pellet performance;At large-type sinterer most common failure, accident described sinter machine is improved design and improves construction, installation quality, the accident rate after reducing it and going into operation; Described large-type sinterer is carried out cold conditions test run and thermal load test run, and handle the problem that occurs in described cold conditions test run and the thermal load test run;Adopt optimal control ratio of components, use high mixture ratio unslaked lime, raising mixture temperature to carry out SINTERING PRODUCTION with the intensified-sintered technology of reasonable control compound water, charcoal.
- A large-type sinterer sintering v-ti magnetite concentrate reach the product method fast, it is characterized in that the described product method that reaches fast comprises:In negative pressure is more than the 15000Pa and sinter machine unit surface air quantity is 100m 3/ (m 2Min)～110m 3/ (m 2Min) carry out sintering under the condition;Described large-type sinterer is carried out cold conditions test run and thermal load test run;Adopt intensified-sintered technology to carry out SINTERING PRODUCTION, described intensified-sintered technology is meant for sinter machine configuration sintered material the time, by weight percentage, with addition of common rich ore powder 20%～40%, outside join return mine 35%～45%, with addition of unslaked lime 5-8%, and mixture moisture is controlled to be 7.5 ± 0.2%, fixed carbon is controlled in 2.8%～3.3% the scope, mixture temperature is increased to more than 60 ℃.
- 3. the product method that reaches fast according to claim 1 and 2 is characterized in that the area of described large-type sinterer is 180m 2More than.
- 4. the product method that reaches fast according to claim 1 and 2 is characterized in that, the described product method that reaches fast also comprises:To improving, so that described lime-slaking table feeder can continue to provide 6%～8% unslaked lime by weight percentage for each batching of sintering process with the structure of the big lime-slaking table feeder of sinter machine production influence degree.
- 5. the product method that reaches fast according to claim 1 and 2 is characterized in that, described cold conditions test run comprises that the Solo test run and the time of interlock test run and described cold conditions test run were not less than 72 hours; The time of described thermal load test run is not less than 48 hours, and handles the problem that occurs in described cold conditions test run and the thermal load test run.
- 6. the product method that reaches fast according to claim 1, it is characterized in that, described intensified-sintered technology comprises: for sinter machine configuration sintered material the time, by weight percentage, with addition of common rich ore powder 20%～40%, outside join return mine 35%～45%, with addition of unslaked lime 5-8%, and mixture moisture is controlled to be 7.5 ± 0.2%, fixed carbon is controlled in 2.8%～3.3% the scope; Mixture temperature is increased to more than 60 ℃.
- 7. the product method that reaches fast according to claim 1 and 2 is characterized in that, main exhauster throttle opening 〉=60% of described sinter machine, negative pressure 〉=15000Pa.
- 8. the product method that reaches fast according to claim 1 and 2, it is characterized in that, the equipment of described large-type sinterer generation most common failure, accident comprises one or more in conveyor, main exhauster, mixing machine, single roll crusher, aggregate feeder units, the central cooler, and to design of the described equipment property improved and raising installation quality.
- 9. the product method that reaches fast according to claim 1 and 2 is characterized in that the raw material of described large-type sinterer comprises v-ti magnetite concentrate, and the composition of described v-ti magnetite concentrate contains TFe 52%～56%, FeO 29%～33%, SiO by weight 22.5%～4.5%, CaO 1.5%～2.2%, MgO 2.0%～3.2%, Al 2O 33.0%～4.5%, V 2O 50.5%～0.65%, TiO 210%～15%, S 0.4%～0.6%, and the impurity of surplus and contains in the described v-ti magnetite concentrate＜particle 40%～60% of 200 order grades by weight percentage.
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| CN103017534A (en) * | 2012-12-27 | 2013-04-03 | 中冶长天国际工程有限责任公司 | Method and system for controlling negative pressure of main draft fan of sintering machine |
| CN103725872A (en) * | 2013-12-20 | 2014-04-16 | 攀钢集团成都钢钒有限公司 | Method for improving drum index of vanadium-titanium magnetite sinter |
| CN104060083A (en) * | 2013-06-20 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Sintering method of vanadium titanium magnetite |
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| CN101717852A (en) * | 2009-11-12 | 2010-06-02 | 攀钢集团攀枝花钢钒有限公司 | Sintering method of high-Ti type V-Ti magnetite concentrate |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017534A (en) * | 2012-12-27 | 2013-04-03 | 中冶长天国际工程有限责任公司 | Method and system for controlling negative pressure of main draft fan of sintering machine |
| CN103017534B (en) * | 2012-12-27 | 2014-06-04 | 中冶长天国际工程有限责任公司 | Method and system for controlling negative pressure of main draft fan of sintering machine |
| CN104060083A (en) * | 2013-06-20 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Sintering method of vanadium titanium magnetite |
| CN104060083B (en) * | 2013-06-20 | 2017-02-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Sintering method of vanadium titanium magnetite |
| CN103725872A (en) * | 2013-12-20 | 2014-04-16 | 攀钢集团成都钢钒有限公司 | Method for improving drum index of vanadium-titanium magnetite sinter |
| CN103725872B (en) * | 2013-12-20 | 2015-07-22 | 攀钢集团成都钢钒有限公司 | Method for improving drum index of vanadium-titanium magnetite sinter |
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