CN1021346C - Method for manufacturing agglomerates of sintered pellets - Google Patents
Method for manufacturing agglomerates of sintered pellets Download PDFInfo
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- CN1021346C CN1021346C CN 90100659 CN90100659A CN1021346C CN 1021346 C CN1021346 C CN 1021346C CN 90100659 CN90100659 CN 90100659 CN 90100659 A CN90100659 A CN 90100659A CN 1021346 C CN1021346 C CN 1021346C
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- agglomerates
- sintered pellets
- sintering
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Abstract
A method for manufacturing agglomerates of sintered pellets comprises the steps of mixing and pelletizing fine iron ore, flux, binder and return fines, coating pelletized materials, charging the green pellets into a sintering machine (13), drying charged green pellets in a drying furnace (14) and igniting the pellets in an ignition furnace (15), sintering the green pellets in the sintering machine, and measuring a noise level by the use of a noise sensor arranged on a sintering bed and controlling a sintering operation on the basis of the noise level.
Description
The present invention relates to make the method for agglomerates of sintered pellets, particularly in making agglomerates of sintered pellets, control the method for operation with detector.
With stirrer with powdered iron ore, snake mosquito stone one class flux with return and with elementary nodulizer mixture is made spherical material again after powder stirs into mixture.Apply on the spherical material that elementary nodulizer is made and cover solid fuel, just can be made into granularity is the not agglomerates of sintered pellets of 5-10mm.This not agglomerates of sintered pellets is put into diagrid type sinter machine carry out sintering.Pelletizing behind the sintering is ground into the particle of predetermined particle size.Then with its cooling and classification, thereby make the agglomerates of sintered pellets of granularity greater than 4mm.
When making agglomerates of sintered pellets, must carry out following control:
(a) by in the reduction of agglomerates of sintered pellets discharging several air room temps on one side and the raising of main blower swabbing pressure, the ventilation property of the not agglomerates of sintered pellets of the sinter machine of can finding to pack into degenerates.In addition, also must control the position of burning point.The position of burning point can be determined by the temperature of measuring the sinter machine hollow gas chamber and the position of finding out the wind box with top temperature from the distribution of each wind box temperature.The speed of control chassis just can make the burning point be in the optimum position.
(b) measure temperature head on the wind box width, perhaps measure agglomerates of sintered pellets in discharging part high-temperature zone the difference along bed of material width.According to controlling on the sinter machine width the not loading density of agglomerates of sintered pellets in the difference that records on the width, thereby on the sinter machine width, obtain uniform sintering velocity.
In above-mentioned method (a), after the pelletizing of ventilation property difference is packed sinter machine into, just after passing through sintering ignition furnace 30-35 minute, could find degenerating of pelletizing ventilation property.And the reason that not clear ventilation property degenerates is because the not explosion of agglomerates of sintered pellets or because other factors.Therefore, spend a lot of times to go to understand the reason that ventilation property degenerates, so just cause the reduction of production efficiency and the decline of output.
In aforesaid method (b), utilize under the situation of temperature head in the wind box, because leakage of air also error can occur.Therefore, have only when uneven certain part of sintering velocity arrives the wind box on agglomerates of sintered pellets discharging part one side, just can record the temperature head of wind box on width.Also only when an improper agglomerating part arrives agglomerates of sintered pellets discharging part, just can record the difference of high-temperature zone on width.In other words, only after agglomerates of sintered pellets was not packed into sinter machine 30-40 minute, just can detect the appearance of improper sintering part.Measure owing to postponed improper sintering, the control of loading density has also been postponed on the sinter machine width.Therefore, output and the low problem of throughput with regard to agglomerates of sintered pellets having occurred.
Purpose of the present invention is exactly to improve throughput, output and the quality product of agglomerates of sintered pellets.
For achieving the above object, the invention provides a method of making agglomerates of sintered pellets, its step comprises:
Powdered iron ore, flux, tackiness agent and the mixing and system ball of returning powder;
Mix and make the spherical material that the ball stage obtains with deposited the covering of powdered solid fuel, apply the not agglomerates of sintered pellets that covers thereby produce with powdered solid fuel;
Above-mentioned not agglomerates of sintered pellets is put into sinter machine;
The not agglomerates of sintered pellets that oven dry is put in stoving oven, and in sintering ignition furnace, light not agglomerates of sintered pellets;
Sintering agglomerates of sintered pellets not in sinter machine;
Measure noise intensity with the noise detector that is installed in sintering bed top, and according to this noise intensity control sintering work.
In doing following detailed explanation in conjunction with the accompanying drawings, can be clear that above-mentioned purpose of the present invention, other purposes and advantage.
Fig. 1 is the synoptic diagram of each step from the hopper to the sinter machine;
Fig. 2 is by being installed in the functional diagram of the noise detector control sintering work on the sintering ignition furnace of the present invention;
Fig. 3 is by vertically being installed in the functional diagram of the noise detector control sintering work on the sinter machine of the present invention;
Fig. 4 is the synoptic diagram of position, burning point of the present invention;
Fig. 5 is the synoptic diagram that detects position, combustion zone method therefor along sintering pallet width of the present invention;
Fig. 6 is a synoptic diagram of implementing the used sinter machine charging of the inventive method part;
Fig. 7 is the synoptic diagram of sinter machine loading density control method of the present invention.
Most preferred embodiment-1
Make not agglomerates of sintered pellets during baking and heat rapidly when lighting.When containing at agglomerates of sintered pellets not when being heated the iron ore material that easily splits and since the iron ore material be subjected to thermal rupture and the not evaporation of the interior moisture content of agglomerates of sintered pellets, agglomerates of sintered pellets is not the explosion powdered.When agglomerates of sintered pellets again and again explosion did not take place, the ventilation property of sintering bed will degenerate.The explosion number of agglomerates of sintered pellets and the explosion sound do not link.Above the sintering bed, measure the explosion sound.With the detector that is installed in sintering ignition furnace the explosion number of the not agglomerates of sintered pellets by sintering ignition furnace is measured as noise intensity.That is to say,, therefore can promptly in operation, react because the degenerating of the not agglomerates of sintered pellets ventilation property that explosion caused of agglomerates of sintered pellets do not record when agglomerates of sintered pellets is not by sintering ignition furnace.
Fig. 1 is the synoptic diagram of each step from the hopper to the sinter machine.Extract coarse grain iron ore in the hopper 1,2 according to pre-determined quantity, the particulate charging in the hopper 3, as the serpentine of flux, granularity as the lime kilning of tackiness agent, and adds water and mixes in the hopper 6 less than the powder that returns of 4mm in the hopper 5 in the hopper 4.Return powder and be in the pulverizing of agglomerates of sintered pellets and classification process and produce.Mix above-mentioned materials and obtain a kind of mixture, in mixture, add entry after, with elementary disk apparatus for making pearl ball 8 mixture is tentatively made and spherically to be expected.With sieve mesh is that the sieve 9a of 4mm will be sieved by the elementary spherical material that elementary disk apparatus for making pearl ball 8 is made.Undersized granularity is turned back to elementary disk apparatus for making pearl ball 8 less than the sphere material of 4mm, and repeat to make ball.Granularity is that the sieve 9b of 25mm sieves greater than the sphere material sieve mesh of 4mm.With the sphere material adding secondary disk apparatus for making pearl ball 10 of granularity less than 25mm.Solid fuel in the hopper 11 is added secondary disk apparatus for making pearl ball, solid fuel is applied overlay on the elementary spherical material, thereby produce the not agglomerates of sintered pellets that granularity is 5-10mm.Coke breeze, charcoal, coal dust etc. all can be used as solid fuel.
Put in the chassis 18 of diagrid type sinter machine 13 by the not agglomerates of sintered pellets that elementary funnel 12 will obtain, this incites somebody to action not agglomerates of sintered pellets threading chassis 18 by means of the rotary conveyor (not shown).The not agglomerates of sintered pellets that to pack into is wipeed off by predetermined height.After the not agglomerates of sintered pellets with predetermined even height is dried in stoving oven 14, just do not light on the surface of agglomerates of sintered pellets 15 li generals of sintering ignition furnace.The high-temp waste gas of discharging from sinter machine agglomerates of sintered pellets discharging part wind box on one side is used for stoving oven 14, and this is sent to stoving oven 14 by means of air-circulating fan 16 with said high-temp waste gas.In the sinter machine of stoving oven 14 back, main blower 17 aspirates gas or air downwards, makes its surface by the not agglomerates of sintered pellets of the chassis 18 of packing into.The combustion zone that produces on agglomerates of sintered pellets laminar surface not moves down along with moving of chassis.Just in the front of sinter machine agglomerates of sintered pellets discharging part, on whole floor height sintering agglomerates of sintered pellets not, and partly carry out continuous discharge in the agglomerates of sintered pellets discharging.The agglomerates of sintered pellets that draws off promptly enters to be pulverized and the classification stage.
Fig. 2 is by being installed in the block schematic diagram of the noise detector control sintering work on the sintering ignition furnace of the present invention.Noise detector 20 is contained on the sintering ignition furnace 15.Detect the noise intensity that produces when agglomerates of sintered pellets is not lighted with noise detector 20.Control sintering work according to noise intensity.Control sintering work at batch mixing and system ball stage by the addition of tackiness agent in the sphere material and the temperature in stoving oven and the sintering ignition furnace.When noise intensity surpasses predetermined numerical value, at least can the addition that increases tackiness agent, improve the temperature of stoving oven 14 and reduce sintering ignition furnace 15 temperature this select one to react aspect three.
In most preferred embodiment-1, to compare with the processing method in past, operant response can shift to an earlier date 1-2 hour, therefore, can prevent the decline of production efficiency and quality product.
Most preferred embodiment-2
Specify most preferred embodiment-2 referring now to accompanying drawing.Fig. 3 is by vertically being installed in the functional diagram of the noise detector control sintering work on the sintering ignition furnace of the present invention.To put into 18 li in the chassis of diagrid type sinter machine 13 according to the not agglomerates of sintered pellets that method shown in Figure 1 is produced.After the not agglomerates of sintered pellets of threading chassis 18 is dried in stoving oven 14, do not light on the surface of agglomerates of sintered pellets by sintering ignition furnace 15.In the sinter machine of stoving oven 14 back, with the surface of the not agglomerates of sintered pellets layer of main blower with the suction downwards of gas or air and by putting into chassis 18.Combustion zone in not agglomerates of sintered pellets laminar surface generation moves down along with moving of chassis.Just in the front of sinter machine agglomerates of sintered pellets discharging part, sintering agglomerates of sintered pellets layer not on the short transverse of agglomerates of sintered pellets layer not, and partly carry out continuous discharge in the agglomerates of sintered pellets discharging.The agglomerates of sintered pellets that unloads promptly enters to be pulverized and the classification stage.
The not agglomerates of sintered pellets that contains the disruptive iron ore material that is easy to be heated owing to the iron ore material be subjected to thermal rupture and not in the agglomerates of sintered pellets evaporation of moisture content explosion takes place, and crack.When above the sintering bed, measuring crepitant noise intensity, just can know, the intensity of noise along with the edge, sintering zone not moving down of agglomerates of sintered pellets layer weaken.Because the cracker of agglomerates of sintered pellets does not have a distinctive frequency band, when measuring noise intensity, can improve crepitant measuring accuracy by means of a bandpass filter.
With several noise detector 30a, 30b, 30c and 30d, along sinter machine vertically with the spacing that equates be installed in sintering ignition furnace back sintering bed above.Said spacing is preferably in about 2 meters.Noise detector is installed in 5-10cm place, sintering bed top.To be sent to arithmetic and control unit 32 by the noise intensity signal that noise detector 30a, 30b, 30c and 30d record.By the position of noise detector 30a, the 30b, 30c and the 30d that represent with X-coordinate vertically to be provided with along sinter machine, represent noise intensity and a near linear marking with ordinate zou, can draw a noise intensity decay straight line.Article one, the straight line of representing predetermined noise intensity No on the burning point, promptly y=No intersects with said straight line, can draw a burning point by this intersection point.Fig. 4 is the synoptic diagram of control position, burning point of the present invention method therefor.When drawing noise intensity decay straight line, be that No(is y=No from decay straight line burning point noise intensity for the B line among Fig. 4) the collinear intersection point can try to achieve distance D
4Distance D
4Be exactly the burning point, it is to represent with the distance from sintering ignition furnace layer end.Here it should be explicitly made clear at this point D
4Position with respect to the burning point ideal range.If the burning point is in distance D
4The position on because the burning point is positioned at agglomerates of sintered pellets discharging part on one side, rather than be positioned at D
1To D
2Ideal range in, go to reduce predetermined chassis speed so just export a signal.
If the noise intensity of trying to achieve decay straight line is the A among Fig. 4, is that No(is y=No from decay straight line A and burning point noise intensity) the collinear intersection point can obtain distance D
5Distance D
5Be the burning point, it is to represent with the distance from the sintering ignition furnace tail end.If the burning point is positioned at D
5, because the burning point is in D
1To D
2Ideal range within, so can not export the signal that increases and reduce chassis speed.
When the noise intensity obtained decay straight line during for the C among Fig. 4, the distance D of burning point
3Because D
3Be positioned at sintering ignition furnace on one side, and not at D
1To D
2Ideal range in, so just output increases the signal of chassis predetermined speed.
Increase and minimizing chassis speed are as follows:
(a) obtain relational expression between position, burning point and the increase and decrease chassis speed in advance.
(b) obtain the amount of movement of burning point, so that the burning point is in D
1To D
2Scope in.
(c), can obtain the increase and decrease amount of chassis speed with the amount of movement substitution above-mentioned relation formula of burning point.
The increase and decrease signal of the chassis speed that will draw with above-described method is calculated and control device 32 is delivered to the CD-ROM drive motor 34 of the machine of fusing by means of far away.Chassis speed is promptly accelerated or slowed down to CD-ROM drive motor 34.Therefore, the burning point always is in slave mode, thereby the burning point is in the ideal range.
Preferably noise detector 30a, 30b, 30c and 30d are installed in agglomerates of sintered pellets discharging part on one side from sintering ignition furnace tail end 5-10m place.Employing is installed in the noise detector at sintering ignition furnace tail end 5-10m place, can processing method than before shifts to an earlier date 15-20 minute and records the burning point.Therefore, just can record the burning point in advance and react in advance, also just can prevent degenerating and the reduction of output of quality product.
Most preferred embodiment-3
Fig. 5 is the synoptic diagram that detects position, combustion zone method therefor along sintering pallet width of the present invention.In sintering ignition furnace 15, light the surface of the not agglomerates of sintered pellets of the sinter machine of packing into.When chassis 18 aspirates gas or air downwards when agglomerates of sintered pellets discharging part is mobile, thereby the point of ignition of lighting is not being moved down in the agglomerates of sintered pellets layer.When the deviation of air suction appearred in the direction along the chassis width, the speed that the combustion zone moves down also produced deviation.Can be clear that from a cross section of sintering bed, from sintering bed surface to the combustion zone 37 deviations that a floor height occurs.For example in Fig. 5, during when the height of Correlation Centre part with near the height of chassis wall part, along the height in the centre of chassis width less than height near chassis wall portion position.Sintering zone 36 is in the top of combustion zone 37.Agglomerates of sintered pellets district 38 is not in the bottom of combustion zone 37.Sintering zone 36 and not the deviation in agglomerates of sintered pellets district 38 all be corresponding with the deviation of combustion zone 37.
Some not agglomerates of sintered pellets generation explosions and produce cracker in the combustion zone 37.Measure crepitant noise intensity with the noise detector that is installed in above the sintering bed.Because the weakening of noise intensity is what the degree of depth with combustion zone 37 was directly proportional, when detector is installed at a plurality of positions on the width of chassis, just can draw the position of combustion zone 37 on the chassis width.
At 5-10cm place, sintering bed surface, with the width of certain spacing along chassis 45, per 5 is a row, and two row's noise detectors 40 are installed.To the distance the sintering ignition furnace exhaust end, should make the combustion zone can on its width, perceive out significantly from noise detector 40 in the deviation on its degree of depth.Because the cracker of agglomerates of sintered pellets does not have a distinctive frequency band, therefore, when adopting bandpass filter to measure noise intensity, just can improve crepitant measuring accuracy.For example, can adopt 250 to 570H
2Frequency band.Measurement signal to noise detector 40 can adopt treatment unit 42 to carry out data processing.The data that are subjected to graphicprocessing or display process can show with diagrammatic form on cathode tube 44.
Fig. 6 is a synoptic diagram of implementing the used sinter machine charging of the inventive method part.With loading belt conveyor 46 agglomerates of sintered pellets is put into chassis 18.The height drawout of the not agglomerates of sintered pellets that scraper plate 48 will be put into makes it reach predetermined height.
Fig. 7 is the synoptic diagram that the material of putting into sinter machine is carried out density control method therefor.The density of material is to be controlled by the height of the not agglomerates of sintered pellets layer of piling up near the chassis wall.Control the not height of agglomerates of sintered pellets layer, just controlled the macrobead quantity of agglomerates of sintered pellets not that flows to the chassis center.When a large amount of macrobeads being arranged agglomerates of sintered pellets does not flow to the chassis center, the ventilation property of the not agglomerates of sintered pellets at chassis center will improve.Otherwise when having only a small amount of macrobead agglomerates of sintered pellets does not flow to the chassis center, the macrobead not ventilation property of agglomerates of sintered pellets will degenerate.By means of the breaker plate 50 that is installed on the loading belt conveyor 46, can controlling flow to the macrobead at the chassis center quantity of agglomerates of sintered pellets not.In other words, record in the combustion zone 37 the not degree of depth of agglomerates of sintered pellets, on the chassis width, control the drift angle 52 of breaker plate according to this degree of depth by noise detector 40.If the position, combustion zone near the chassis wall is darker, expands predetermined angle to regard to the drift angle that makes breaker plate 50, thereby strengthened the density of the material of the chassis of packing into.When the density of the material of packing into becomes big, sintering velocity just slows down.As a result, do not lacking heat near chassis wall place, this has just prevented the not appearance of agglomerates of sintered pellets.
With the processing method in past relatively, the density of the material of the chassis of packing into, according to the present invention can shift to an earlier date 25-30 minute controlled on the chassis width.Therefore, owing to can in time react, just can prevent the reduction of agglomerates of sintered pellets output and productivity.
Claims (14)
1, a kind of method of making agglomerates of sintered pellets, its step comprises:
Make pelletizing with powdered iron ore, flux, tackiness agent with after returning the powder mixing;
Apply with powdered solid fuel and to overlay on described mixing and the system ball spherical material of gained in the stage, apply the not agglomerates of sintered pellets that covers thereby produce powdered solid fuel;
Described not agglomerates of sintered pellets is put into a sinter machine (13);
The described not agglomerates of sintered pellets of oven dry in the stoving oven (14) on described sinter machine, and in sintering ignition furnace (15), light described not agglomerates of sintered pellets; With
The described not agglomerates of sintered pellets of sintering in described sinter machine;
It is characterized in that:
The noise detector (20) that employing is arranged on the ignition furnace is measured noise intensity, described noise intensity is represented by means of the described not explosion sound that is produced by described not agglomerates of sintered pellets when agglomerates of sintered pellets is lighted, and the ventilation property of the sintering bed of sinter machine degenerates when described noise intensity uprises; With
Take the operation control action according to described noise intensity, described control action can improve the ventilation property of sintering bed.
2, the method for claim 1 is characterized in that: described detector is installed on the survey sound pipe of the inboard, furnace wall that places ignition furnace.
3, the method for claim 1 is characterized in that: described operation control action is included in the quantity of mixing and making ball stage control tackiness agent.
4, the method for claim 1 is characterized in that: described operation control action comprises the temperature in the control stoving oven.
5, the method for claim 1 is characterized in that: described operation control action comprises the temperature in the stove of reference mark.
6, the method for claim 1 is characterized in that: described detector is positioned at the 5-10cm place, top on the sintering bed surface of described sinter machine.
7, a kind of method of making agglomerates of sintered pellets, its step comprises:
Make pelletizing with powdered iron ore, flux, tackiness agent with after returning the powder mixing;
Apply with powdered solid fuel and to overlay on described mixing and the system ball spherical material of gained in the stage, apply the not agglomerates of sintered pellets that covers thereby produce powdery solid;
Described not agglomerates of sintered pellets is put into a sinter machine (13);
The described not agglomerates of sintered pellets of oven dry in the stoving oven (14) on described sinter machine, and in sintering ignition furnace (15), light described not agglomerates of sintered pellets; With
The described not agglomerates of sintered pellets of sintering in described sinter machine;
It is characterized in that:
By one group of noise detector (30a vertical setting and that be positioned at the ignition furnace rear along sinter machine, 30b, 30c, 30d) measure noise intensity, the described noise intensity sudden and violent crepitation that described not agglomerates of sintered pellets produces during by described not agglomerates of sintered pellets explosion rings expression, and calculates a burning point based on described noise intensity longitudinally; With
To be controlled in the pre-determined range of described burning point based on the described burning point that described noise intensity is calculated.
8, method as claimed in claim 7 is characterized in that: by means of the described burning point of chassis velocity variations control based on described noise intensity calculating.
9, method as claimed in claim 7 is characterized in that: described one group of detector is positioned at the 5-10m place, back of the ignition furnace tail end of agglomerates of sintered pellets discharging part one side.
10, method as claimed in claim 7 is characterized in that, described noise intensity is to record in the frequency band of 250-570Hz.
11, a kind of method of making agglomerates of sintered pellets, its step comprises:
Make pelletizing with powdered iron ore, flux, tackiness agent with after returning the powder mixing;
Apply with powdered solid fuel and to overlay on described mixing and the system ball spherical material of gained in the stage, apply the not agglomerates of sintered pellets that covers thereby produce powdered solid fuel;
Described not agglomerates of sintered pellets is put into a sinter machine (13);
The described not agglomerates of sintered pellets of oven dry in the stoving oven (14) on described sinter machine, and in sintering ignition furnace (15), light described not agglomerates of sintered pellets; With
The described not agglomerates of sintered pellets of sintering in described sinter machine;
It is characterized in that:
Measure noise intensity by one group along the noise detector setting of chassis width and that be positioned at the ignition furnace rear (40), the explosion sound indication that described noise intensity is produced by described not agglomerates of sintered pellets, and the ventilation property of the sintering bed of sinter machine worsens in zone that described noise intensity uprises and
By adopting the deviation of calculating, along the described not loading density of agglomerates of sintered pellets of being adorned of chassis width control.
12, method as claimed in claim 11 is characterized in that described noise detector is positioned at 5-10cm place, sintering bed top.
13, method as claimed in claim 11 is characterized in that described noise intensity is to record in the frequency band of 250-570Hz.
14, method as claimed in claim 11 is characterized in that: control described loading density by means of the breaker plate (50) that is installed on the loading belt conveyor (46) that transports agglomerates of sintered pellets not.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3342889A JPH0670261B2 (en) | 1989-02-13 | 1989-02-13 | Agglomerated ore manufacturing method |
JP033428/89 | 1989-02-13 | ||
JP033429/89 | 1989-02-13 | ||
JP039709/89 | 1989-02-20 | ||
JP1039709A JPH02217427A (en) | 1989-02-20 | 1989-02-20 | Method for adjusting sintering speed in width direction of pallet in manufacture of agglomerated ore |
Publications (2)
Publication Number | Publication Date |
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CN1044828A CN1044828A (en) | 1990-08-22 |
CN1021346C true CN1021346C (en) | 1993-06-23 |
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ID=26372104
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN 90100659 Expired - Fee Related CN1021346C (en) | 1989-02-13 | 1990-02-12 | Method for manufacturing agglomerates of sintered pellets |
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CN (1) | CN1021346C (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN1046140C (en) * | 1994-07-06 | 1999-11-03 | 杨润泉 | Sintering process for making cherry small ball by adding water soluble additives in iron concentrate |
CN1055318C (en) * | 1998-05-29 | 2000-08-09 | 冶金工业部钢铁研究总院 | Production of sintered pelletized minerals |
CN1073633C (en) * | 1999-09-29 | 2001-10-24 | 冶金工业部钢铁研究总院 | Method for making pellet agglomerate used in iron-smelting |
RU2587000C1 (en) * | 2015-03-26 | 2016-06-10 | Открытое акционерное общество "Невское проектно-конструкторское бюро" | Device for aviation ammunition holding after head of air-delivered munition on rack |
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1990
- 1990-02-12 CN CN 90100659 patent/CN1021346C/en not_active Expired - Fee Related
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