CN103105065B - Firing end point control method and firing end point control system - Google Patents
Firing end point control method and firing end point control system Download PDFInfo
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- CN103105065B CN103105065B CN201210579073.1A CN201210579073A CN103105065B CN 103105065 B CN103105065 B CN 103105065B CN 201210579073 A CN201210579073 A CN 201210579073A CN 103105065 B CN103105065 B CN 103105065B
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Abstract
The invention discloses a firing end point control method and a firing end point control system. The method comprises the steps: detecting the position and the temperature of the firing end point; judging the relationship between the position of the firing end point and a preset range of the position of the firing end point, and judging the relationship between the temperature of the firing end point and a preset range of the temperature of the firing end point; if the temperature of the firing end point is normal, gradually regulating the frequency of a main exhaust fan to the maximum; if the temperature of the firing end point is too low, reducing the thickness of a material layer; if the temperature of the firing end point is too high, increasing the thickness of a material layer; if the position of the firing end point is in advance, improving the speed of a trolley; if the position of the firing end point is postponed, decelerating the speed of the trolley. The method can enable the position and the temperature of the firing end point to meet the production requirements, avoid the problems of waste of fuel due to the fact that the temperature of the firing end point is too high and return mine at high proportion due to the fact that the temperature of the firing end point is too low, so that the aim of production maximization is achieved.
Description
Technical field
The application relates to SINTERING TECHNOLOGY field, particularly relates to a kind of sintering indice method and system.
Background technology
Sintering system mainly comprises multiple equipment such as pallet, mixer, main exhauster, central cooler, its total technological process is shown in Figure 1: various raw material is in proportioning room 1 proportioning, form mixed material, then enter mixer 2 to mix and pelletizing, by round roller batcher 3 and nine roller material distributing machine 4, its uniformly dispersing is formed the bed of material on pallet 5 again, igniting blower fan 12 and blower fan 11 of igniting are for material igniting beginning sintering process.The sintering deposit obtained after having sintered enters central cooler 9 and cools after single roll crusher 8 fragmentation, delivers to blast furnace or finished product ore storage bin finally by after the whole grain of screening.Wherein, the oxygen that sintering process needs is provided by main exhauster 10, multiple vertical bellows 6 are side by side provided with below pallet 5, it is the large flue (or claiming flue) 7 of horizontal setting below bellows, large flue 7 is connected with main exhauster 10, main exhauster 10 passes through the negative pressure wind of large flue 7 and bellows 6 generation through chassis, for sintering process provides combustion air.
In sintering process, position (BTPP) and the temperature (BTPT) of sintering end point are key factors, as shown in Figure 2, the position of sintering end point is the bellows position of the temperature curve vertex correspondence that material sintering process is formed, the temperature of sintering end point is the temperature of charge of the temperature curve vertex correspondence that material sintering process is formed, and sintering end point is that the bed of material has been grilled thoroughly but do not formed the point of burning.Current sintering system, usually sintering end point position is determined the position preset at, such as: the position of penultimate bellows, when controlling sintering process, by regulating platform vehicle speed or thickness of feed layer, by the sintering end point position that sintering end point position control is presetting.
But thisly sintering end point is adjusted to the control procedure pre-setting sintering end point position, easily cause the too high or too low for temperature of sintering end point.Fig. 2 shows sintering end point position and temperature relation figure.In Fig. 2, the thermal self-restraint stress of temperature curve S1, S2 and S3 all appears at No. 22 bellows positions (penultimate bellows), but curve S 1 in the temperature of this position nearly 500 degree, the too high waste reflecting fuel of temperature; The temperature of curve S 3 in this position is less than 200 degree, and the too low material that reflects of temperature may not grilled thoroughly, and this can cause a high proportion of returning mine, i.e. the generation of underproof sintering deposit.
Summary of the invention
In view of this, the embodiment of the present application provides a kind of sintering indice method and system, the temperature of sintering end point and position all can be controlled in preset range, on the basis of fuel saving, ensures sintering quality.
To achieve these goals, the technical scheme that provides of the embodiment of the present application is as follows:
A kind of sintering indice method, comprising:
Detect sintering end point position and sintering end point temperature;
Judge described sintering end point position and the relation of sintering end point position range preset, and, judge the relation of described sintering end point temperature and the sintering end point temperature range preset;
If described sintering end point temperature is normal, progressively by main exhauster frequency adjustment to maximum; If described sintering end point temperature is too low, reduce thickness of feed layer; If described sintering end point temperature is too high, increase thickness of feed layer;
If described sintering end point position is advanced, improve machine speed; If described sintering end point position is delayed, reduce machine speed.
A kind of sintering indice system, comprising:
Detecting unit, for detecting sintering end point position and sintering end point temperature;
Position judgment unit, for judging described sintering end point position and the relation of sintering end point position range preset;
Temperature judging unit, for judging described sintering end point temperature and the relation of sintering end point temperature range preset;
Sintering velocity control unit, for when described sintering end point temperature is normal, progressively by main exhauster frequency adjustment to maximum; When described sintering end point temperature is too low, reduce thickness of feed layer; When described sintering end point temperature is too high, increase thickness of feed layer;
When described sintering end point position is advanced, improve machine speed; When described sintering end point position is delayed, reduce machine speed.
From above technical scheme, the method that the embodiment of the present application provides, first sintering end point position and sintering end point temperature is detected, then sintering end point position and the relation of sintering end point position range pre-set is judged respectively, sintering end point temperature and the relation of sintering end point temperature range pre-set, according to the judged result of sintering end point position and the judged result of sintering end point temperature, regulating platform vehicle speed, thickness of feed layer and main exhauster frequency, with in the sintering end point position range making sintering end point position drop on to pre-set, and in sintering end point temperature range sintering end point temperature being dropped on pre-set.
Compared with prior art, the regulative mode that the method adopts machine speed, thickness of feed layer and main exhauster frequency to combine, can make to grill thoroughly final position and sintering end point temperature all meets production requirement, avoid the too high waste causing fuel of sintering end point temperature, and sintering end point temperature is too low causes a high proportion of problem of returning mine.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of existing sintering machine;
Fig. 2 is existing sintering end point position and temperature profile;
The schematic flow sheet of the sintering indice method that Fig. 3 provides for the embodiment of the present application one;
The schematic flow sheet of the sintering indice method that Fig. 4 provides for the embodiment of the present application two;
The schematic flow sheet of the sintering indice method that Fig. 5 provides for the embodiment of the present application three;
The schematic flow sheet of the sintering indice method that Fig. 6 provides for the embodiment of the present application four;
The structural representation of a kind of sintering indice system that Fig. 7 provides for the embodiment of the present application five;
The structural representation of the detecting unit that Fig. 8 provides for the embodiment of the present application five;
The structural representation of the sintering velocity control unit that Fig. 9 provides for the embodiment of the present application five;
The structural representation of the another kind of sintering indice system that Figure 10 provides for the embodiment of the present application five;
The structural representation of the sintering indice system that Figure 11 provides for the embodiment of the present application six.
Detailed description of the invention
Technical scheme in the application is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all should belong to the scope of the application's protection.
Embodiment one:
The schematic flow sheet of the sintering indice method that Fig. 3 provides for the embodiment of the present application one.
As shown in Figure 3, the method comprises:
S101: detect sintering end point position and sintering end point temperature.
Sintering end point is that the bed of material has been grilled thoroughly but do not formed the point of burning, and the fuel now in the bed of material has all burnt, so the temperature of temperature in whole material sintering process of sintering end point is the highest.
Temperature in material sintering process can utilize the temperature of flue gas in bellows indirectly to obtain, and also can detect and obtains by set temperature sensor on chassis.If utilize temperature sensor collecting temperature, for the situation requiring on-line checkingi function, temperature sensor is arranged on sintering pallet; And for experimentation, temperature sensor can be arranged in the bed of material.
In the present embodiment, adopt and thermocouple is set on sintering pallet, the temperature gathered by the thermocouple of different bellows position is as the temperature of bellows, then the temperature curve of all bellows is formed, and then the temperature being positioned at temperature curve vertex correspondence is defined as sintering end point temperature, and the position of temperature curve vertex correspondence is defined as sintering end point position.
S102: judge sintering end point temperature and the relation of sintering end point temperature range preset.
At present, the sintering machine of 180 square meters is provided with usually 18-20 bellows, the sintering of 360 square meters is provided with usually 23-24 bellows.
The sintering end point position preset is generally on second-to-last bellows, namely the sintering end point position range preset is in second-to-last bellows length range, sintering machine to be arranged 20 bellows, the sintering end point position range preset is in the 19th bellows length range.
For the material of fixed mixing ratio, sintering end point temperature range corresponding to Different layer of the compost thickness is different, in the present embodiment, can according to specific proportioning and the material of specific thickness of feed layer test, the sintering end point temperature range of experimentally data in advance setting.
S103: progressively by main exhauster frequency adjustment to maximum.
When judged result be sintering end point temperature be positioned at the sintering end point temperature range preset time, namely sintering end point temperature is normal, this means that the gas permeability of the current bed of material meets the demands, in order to make fuel in the bed of material can sufficient combustion, can by the frequency adjustment of main exhauster to maximum.
S104: reduce thickness of feed layer.
When judged result be sintering end point temperature too low time, illustrate that the gas permeability of the bed of material is poor, and then cause the sintering quality of the bed of material poor, easily produce more defective sintering deposit.In order to reduce the amount of defective sintering deposit, need the gas permeability increasing the bed of material.In the present embodiment, by reducing thickness of feed layer, increasing the gas permeability of the bed of material, and then reducing the amount of defective sintering deposit.
S105: increase thickness of feed layer;
When judged result be sintering end point temperature too high time, illustrate that the gas permeability of the bed of material is better, bed of material fuel combustion is abundant, but because gas permeability is higher, make to be increased by the air quantity of the bed of material, the heat causing air quantity to be taken away is more, waste the heat that bed of material fuel produces, namely waste fuel.
In order to reduce waste of fuel, the gas permeability of the bed of material can be reduced.In the present embodiment, by reducing thickness of feed layer, realizing the gas permeability reducing the bed of material, and then reducing waste of fuel.
When thickness of feed layer is regulated, can carry out according to the time interval pre-set respectively, such as: regulated a thickness of feed layer every 1 minute.In addition, the amount that thickness of feed layer regulates at every turn, can set according to actual conditions, and in the present embodiment, each amount increasing or increase thickness of feed layer is 10mm.
S106: judge sintering end point position and the relation of sintering end point position range preset.
S107: improve machine speed.
When judged result be sintering end point position advanced time, illustrate that sintering pallet speed is comparatively slow, need to improve machine speed.
S108: reduce machine speed.
When judged result be sintering end point position advanced time, illustrate that sintering pallet speed is comparatively slow, need to improve machine speed.
When machine speed is regulated, can carry out according to the time interval pre-set respectively, such as: regulated a machine speed every 5 minutes.In addition, the amount that machine speed regulates at every turn, can set according to actual conditions, and in the present embodiment, each amount increasing or reduce machine speed is 0.04m.
When specifically regulating sintering end point position and sintering end point temperature, can be described by associative list 1:
Table 1:
| Sintering end point temperature | Sintering end point position | Machine speed | Bed of material thickness | Main exhauster frequency |
| Normally | In advance | Improve | Constant | Be adjusted to maximum |
| Normally | Normally | Constant | Constant | Be adjusted to maximum |
| Normally | Delay | Reduce | Constant | Be adjusted to maximum |
| Too high | In advance | Improve | Increase | |
| Too high | Normally | Constant | Increase | |
| Too high | Delay | Reduce | Increase | |
| Too low | In advance | Improve | Reduce | |
| Too low | Normally | Constant | Reduce | |
| Too low | Delay | Reduce | Reduce |
In the present embodiment, for sintering end point temperature and two, sintering end point position condition, preferential adjustment sintering end point temperature, when occurring that sintering end point temperature is too high, when sintering end point position is delayed simultaneously, if now reduce according to the amount of normal setting and burn machine speed, material roasting time will be made to extend, this will certainly increase sintering end point temperature further, so when occurring that sintering end point temperature is too high, and sintering end point position is when delaying, all right holding station vehicle speed is constant, be tending towards normally Deng sintering end point temperature, reduce machine speed again, or, when reducing machine speed, regulate according to the amount less than normal regulating machine speed.
And for occur that sintering end point temperature is too low and sintering end point position is advanced time, if now improve sintering velocity according to the amount of normal setting, material roasting time will be made to shorten, further reduction sintering end point temperature, so, when occurring that sintering end point temperature is too low and sintering end point position is advanced, all right holding station vehicle speed is constant, be tending towards normally Deng sintering end point temperature, improve machine speed again, or, when improving machine speed, regulate according to the amount less than normal regulating machine speed.
Embodiment two:
The schematic flow sheet of the sintering indice method that Fig. 4 provides for the embodiment of the present application two.
As shown in Figure 4, the method comprises:
S201: detect be horizontally installed on each bellows position chassis on the temperature of 6 thermocouples.
On sintering pallet, each bellows correspondence position is provided with 6 thermocouples, and 6 thermocouples are evenly arranged along trolley movement direction, and thermocouple is for detecting the temperature of the bed of material on sintering pallet.
S202: according to the temperature of 6 each bellows of temperature computation that each bellows position obtains.
The average of 6 temperature that each bellows position obtains can be calculated, using the temperature of this average as these bellows.
The temperature of thermocouple in addition, when indivedual thermocouple is due to reasons such as faults itselfs, may occur that too high or too low situation appears in detected temperatures, if at each bellows of calculating, then can cause the temperature calculating bellows to occur error after utilizing this fault.
For this reason, in the present embodiment, when calculating the temperature of each bellows, 6 temperature that each bellows position obtains are removed calculating mean value after maximum temperature, minimum temperature, the mean value calculated by each bellows is as the temperature of each bellows.So just effectively can avoid due to indivedual thermocouple fault and cause calculating the problem occurring error.
S203: the temperature foh of all bellows is become position-temperature curve.
After above-mentioned steps calculates the temperature of each bellows, the corresponding relation between a temperature and bellows position can be obtained, utilize this corresponding relation, a position-temperature curve can be simulated.
In the present embodiment, can using the abscissa of bellows position as this position-temperature curve, using the ordinate of box temperature as this position-temperature curve.
S204: determine sintering end point position and sintering end point temperature.
According to the description of above-mentioned steps, after determining position-temperature curve, the abscissa corresponding to the summit of this curve is defined as sintering end point position, and, the ordinate corresponding to the summit of this curve is defined as sintering end point temperature.
S205: judge sintering end point position and the relation of sintering end point position range preset
S206: progressively by main exhauster frequency adjustment to maximum.
S207: reduce thickness of feed layer.
S208: increase thickness of feed layer.
S209: judge sintering end point temperature and the relation of sintering end point temperature range preset.
S210: improve machine speed.
S211: reduce machine speed.
Step S102 ~ S108 one_to_one corresponding in step S205 ~ S211 and embodiment one, in detail can see in above-described embodiment about the description of step S102 ~ S108, do not repeat them here.
Embodiment three:
The schematic flow sheet of the sintering indice method that Fig. 5 provides for the embodiment of the present application three.
In the above-described embodiments progressively by main exhauster frequency adjustment to before maximum, as shown in Figure 5, the method can also comprise:
S301: detect main exhauster frequency.
In above-mentioned steps S1031, step S1032 or step S1033, if current main exhauster frequency has equaled the peak frequency pre-set, so again main exhauster frequency is regulated with regard to not needing.So before regulating main exhauster frequency, main exhauster frequency under current state first can be detected.
S302: judge whether main exhauster frequency is less than the peak frequency pre-set.
After main exhauster frequency being detected, if main exhauster frequency is less than the peak frequency pre-set, so carry out step S206, otherwise, without the need to regulating main exhauster frequency, direct process ends.
Due to above-mentioned be progressively that sintering end point temperature is normal by main exhauster frequency adjustment to the situation that maximum step is corresponding, so that is, current bed permeability meets the demands, so in order to make fuel in the bed of material can sufficient combustion, and can by the frequency adjustment of main exhauster to maximum.
Embodiment four:
The schematic flow sheet of the sintering indice method that Fig. 6 provides for the embodiment of the present application four.
In the above-described embodiments, after increase or reducing thickness of feed layer, as shown in Figure 6, the method can also comprise:
S401: judge whether thickness of feed layer is more than or equal to maximum thickness of feed layer.
For sintering pallet, the thickness of feed layer scope that the sintering machine of different model is corresponding is different, for 360 square meter sintering machines, the scope of its thickness of feed layer is between 660mm ~ 720mm, after thickness of feed layer exceeds this scope, the normal work of sintering machine will be affected, as: thickness of feed layer is too high, the ignition operation of Influential cases windburn machine 12 and blower fan 11 of igniting.
When regulating thickness of feed layer, needing the relation judging the thickness of feed layer after regulating and maximum thickness of feed layer or minimum thickness of feed layer, when thickness of feed layer is more than or equal to maximum thickness of feed layer after regulating, carrying out step S402.
S402: stop regulating thickness of feed layer, reduce the frequency of main exhauster.
Because the thickness of feed layer after adjustment has exceeded the maximum thickness of feed layer limit value of sintering pallet setting, namely the gas permeability of the bed of material cannot be reduced by increasing thickness of feed layer, in order to control the combustion case of the bed of material, the frequency of main exhauster can be reduced, be reduced by the air quantity of the bed of material, and then reduce the temperature of the bed of material.
S403: judge whether thickness of feed layer is less than or equal to maximum thickness of feed layer.
When thickness of feed layer is less than or equal to minimum thickness of feed layer after regulating, carry out step S404.
S404: stop regulating thickness of feed layer, increase the frequency of main exhauster.
Because the thickness of feed layer after adjustment has reached the minimum thickness of feed layer limit value of sintering pallet setting, namely the gas permeability of the bed of material cannot be increased by reducing thickness of feed layer, in order to control the combustion case of the bed of material, the frequency of main exhauster can be increased, increase the air quantity by the bed of material, promote bed of material fuel combustion, improve the temperature of the bed of material.
When main exhauster frequency is regulated, can carry out according to the time interval preset respectively, such as: regulated a main exhauster frequency every 10 minutes, and the amount that main exhauster frequency regulates at every turn, can set according to actual conditions, such as: 5% can be regulated at every turn.
| Sintering end point temperature | Sintering end point position | Machine speed | Bed of material thickness | Main exhauster frequency |
| Normally | In advance | Improve | Constant | Be adjusted to maximum |
| Normally | Normally | Constant | Constant | Be adjusted to maximum |
| Normally | Delay | Reduce | Constant | Be adjusted to maximum |
| Too high | In advance | Improve | Increase | Reach the upper limit, reduce main exhauster frequency |
| Too high | Normally | Constant | Increase | Reach the upper limit, reduce main exhauster frequency |
| Too high | Delay | Reduce | Increase | Reach the upper limit, reduce main exhauster frequency |
| Too low | In advance | Improve | Reduce | Reach lower limit, increase main exhauster frequency |
| Too low | Normally | Constant | Reduce | Reach lower limit, increase main exhauster frequency |
| Too low | Delay | Reduce | Reduce | Reach lower limit, increase main exhauster frequency |
The method that the present embodiment provides when specific embodiment, can regulate sintering end point with reference to the content of table 2.
Table 2:
Embodiment five:
The structural representation of the sintering indice system that Fig. 7 provides for the embodiment of the present application five.
As shown in Figure 7, this system comprises: detecting unit 71, position judgment unit 72, temperature judging unit 73 and sintering velocity control unit 74.
Detecting unit 71 is for detecting sintering end point position and sintering end point temperature.
Detecting unit 71 utilizes the thermocouple be arranged on sintering pallet, the temperature gathered by the thermocouple of different bellows position is as the temperature of bellows, then the temperature curve of all bellows is formed, and then the temperature being positioned at temperature curve vertex correspondence is defined as sintering end point temperature, and the position of temperature curve vertex correspondence is defined as sintering end point position.
In the present embodiment, on sintering pallet, each bellows position is horizontally arranged with 6 thermocouples.
As shown in Figure 8, detecting unit 71 comprises:
Receiving element 711, for receiving the temperature of 6 thermocouples in each bellows;
Temperature calculation unit 712,6 temperature for being obtained by each bellows remove calculating mean value after maximum temperature, minimum temperature, and the mean value calculated by each bellows is as the temperature of each bellows;
Curve unit 713, for becoming position-temperature curve by the temperature foh of all bellows;
Position determination unit 714, the position for the vertex correspondence by position-temperature curve is defined as sintering end point position;
Temperature determining unit 715, the temperature for the vertex correspondence by position-temperature curve is defined as sintering end point temperature.
Position judgment unit 72 is for judging sintering end point position and the relation of sintering end point position range preset.
Temperature judging unit 73 is for judging sintering end point temperature and the relation of sintering end point temperature range preset.
Sintering velocity control unit 74 when described sintering end point temperature is normal, progressively by main exhauster frequency adjustment to maximum; When described sintering end point temperature is too low, reduce thickness of feed layer; When described sintering end point temperature is too high, increase thickness of feed layer; When described sintering end point position is advanced, improve machine speed; When described sintering end point position is delayed, reduce machine speed.
As shown in Figure 9, sintering velocity control unit 74 comprises: thickness controlling unit 741, speed control unit 742 and frequency control unit 743, wherein,
Thickness controlling unit 741, for when sintering end point temperature is too low, reduces thickness of feed layer; When sintering end point temperature is too high, increase thickness of feed layer.
When thickness of feed layer is regulated, can carry out according to the time interval pre-set respectively, such as: regulated a thickness of feed layer every 1 minute.In addition, the amount that thickness of feed layer regulates at every turn, can set according to actual conditions, and in the present embodiment, each amount increasing or increase thickness of feed layer is 10mm.
Speed control unit 742, for when sintering end point position is advanced, improves machine speed; When sintering end point position is delayed, reduce machine speed.
When machine speed is regulated, can carry out according to the time interval pre-set respectively, such as: regulated a machine speed every 5 minutes.In addition, the amount that machine speed regulates at every turn, can set according to actual conditions, and in the present embodiment, each amount increasing or reduce machine speed is 0.04m.
Frequency control unit 743 for when sintering end point temperature is normal, progressively by main exhauster frequency adjustment to maximum.
Details can see the content of table 1 in embodiment one.
In addition, if current main exhauster frequency has equaled the peak frequency pre-set, so again main exhauster frequency has been regulated with regard to not needing.So before regulating main exhauster frequency, main exhauster frequency under current state first can be detected.
As shown in Figure 10, this system that the embodiment of the present application provides can also comprise:
Frequency detecting unit 75, for detecting the frequency of main exhauster;
Frequency judging unit 76, for the size of the frequency judging main exhauster and the peak frequency pre-set, and sends to frequency control unit 743 by judged result;
When the frequency of main exhauster is less than the peak frequency pre-set, frequency control unit 743 progressively by main exhauster frequency adjustment to maximum.
When regulating main exhauster frequency, can carry out according to the time interval preset respectively, such as: regulated a main exhauster frequency every 10 minutes, and the amount that main exhauster frequency regulates at every turn, can set according to actual conditions, such as: 5% can be regulated at every turn.
Embodiment six:
The structural representation of the sintering indice system that Figure 11 provides for the embodiment of the present application six.
For sintering pallet, the thickness of feed layer scope that the sintering machine of different model is corresponding is different, for 360 square meter sintering machines, the scope of its thickness of feed layer is between 660mm ~ 720mm, after thickness of feed layer exceedes this scope, the normal work of sintering machine will be affected, as: thickness of feed layer is too high, the ignition operation of Influential cases windburn machine 12 and blower fan 11 of igniting.
As shown in figure 11, on the basis of embodiment four, this system also comprises: thickness judging unit 77.
Thickness judging unit 77 is connected with thickness controlling unit 741, for judging the relation of the thickness of feed layer after thickness controlling unit 741 adjustment and maximum thickness of feed layer and minimum thickness of feed layer, and judged result is sent to frequency control unit.
When thickness of feed layer is more than or equal to maximum thickness of feed layer, frequency control unit 743 reduces the frequency of main exhauster; When thickness of feed layer is less than or equal to minimum thickness of feed layer, frequency control unit 743 increases the frequency of main exhauster.
Details can see the content of table 2 in embodiment three.
When main exhauster frequency is regulated, can carry out according to the time interval preset respectively, such as: regulated a main exhauster frequency every 10 minutes, and the amount that main exhauster frequency regulates at every turn, can set according to actual conditions, such as: 5% can be regulated at every turn.
The above is only the preferred embodiment of the application, those skilled in the art is understood or realizes the application.To be apparent to one skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from the spirit or scope of the application, can realize in other embodiments.Therefore, the application can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a sintering indice method, is characterized in that, comprising:
Detect sintering end point position and sintering end point temperature;
Judge described sintering end point temperature and the relation of sintering end point temperature range preset;
If described sintering end point temperature is too low, reduce thickness of feed layer; If described sintering end point temperature is too high, increase thickness of feed layer;
If described sintering end point temperature is normal, progressively by main exhauster frequency adjustment to maximum, and the relation of sintering end point position range judging described sintering end point position and preset;
If described sintering end point position is advanced, improve machine speed; If described sintering end point position is delayed, reduce machine speed.
2. method according to claim 1, is characterized in that, also comprises:
Detect be horizontally installed on each bellows position chassis on the temperature of 6 thermocouples;
6 temperature that each bellows position obtains are removed calculating mean value after maximum temperature, minimum temperature, the mean value calculated by each bellows is as the temperature of each bellows;
The temperature foh of all bellows is become position-temperature curve;
The position of the vertex correspondence of described position-temperature curve is defined as sintering end point position, and, the temperature of the vertex correspondence of described position-temperature curve is defined as sintering end point temperature.
3. method according to claim 2, is characterized in that, described progressively by main exhauster frequency adjustment to before maximum, also comprise:
Detect described main exhauster frequency;
Judge whether described main exhauster frequency is less than the peak frequency pre-set;
If so, by described main exhauster frequency adjustment to the peak frequency pre-set.
4. method according to claim 3, is characterized in that, after increase or reducing thickness of feed layer, described method also comprises:
The relation of described thickness of feed layer and maximum thickness of feed layer and minimum thickness of feed layer after judging increase or reducing thickness of feed layer;
If described thickness of feed layer is more than or equal to described maximum thickness of feed layer after regulating, stops regulating thickness of feed layer, reduce the frequency of main exhauster;
If described thickness of feed layer is less than or equal to described minimum thickness of feed layer after regulating, stops regulating thickness of feed layer, increase the frequency of main exhauster.
5. method according to claim 4, is characterized in that, adjusts described machine speed, thickness of feed layer and main exhauster frequency according to the time interval pre-set.
6. a sintering indice system, is characterized in that, comprising:
Detecting unit, for detecting sintering end point position and sintering end point temperature;
Position judgment unit, for judging described sintering end point position and the relation of sintering end point position range preset;
Temperature judging unit, for judging described sintering end point temperature and the relation of sintering end point temperature range preset;
Sintering velocity control unit, for when described sintering end point temperature is normal, progressively by main exhauster frequency adjustment to maximum; When described sintering end point temperature is too low, reduce thickness of feed layer; When described sintering end point temperature is too high, increase thickness of feed layer;
When described sintering end point temperature is normal and described sintering end point position is advanced, improve machine speed; When described sintering end point temperature is normal and described sintering end point position is delayed, reduce machine speed.
7. system according to claim 6, is characterized in that, on sintering pallet, each bellows position is horizontally arranged with 6 thermocouples, and described detecting unit comprises:
Receiving element, for receiving the temperature of 6 thermocouples in each bellows;
Temperature calculation unit, 6 temperature for being obtained by each bellows remove calculating mean value after maximum temperature, minimum temperature, and the mean value calculated by each bellows is as the temperature of each bellows;
Curve unit, for becoming position-temperature curve by the temperature foh of all bellows;
Position determination unit, the position for the vertex correspondence by described position-temperature curve is defined as sintering end point position;
Temperature determining unit, the temperature for the vertex correspondence by described position-temperature curve is defined as sintering end point temperature.
8. system according to claim 7, other are, described sintering velocity control unit comprises: thickness controlling unit, speed control unit and frequency control unit, wherein,
Described thickness controlling unit is used for when described sintering end point temperature is too low, reduces thickness of feed layer; When described sintering end point temperature is too high, increase thickness of feed layer;
Described speed control unit is used for when described sintering end point temperature is normal and described sintering end point position is advanced, improves machine speed; When described sintering end point temperature is normal and described sintering end point position is delayed, reduce machine speed;
Described frequency control unit be used for when described sintering end point temperature is normal, progressively by main exhauster frequency adjustment to maximum.
9. system according to claim 8, is characterized in that, also comprises:
Frequency detecting unit, for detecting described main exhauster frequency;
Frequency judging unit, for judging described main exhauster frequency and the size of peak frequency pre-set, and sends to described frequency control unit by judged result;
When described main exhauster frequency is less than the peak frequency pre-set, described frequency control unit progressively by main exhauster frequency adjustment to maximum.
10. system according to claim 9, is characterized in that, also comprises:
Thickness judging unit, be connected with described thickness controlling unit, for judging the relation of the thickness of feed layer after the adjustment of described thickness controlling unit and maximum thickness of feed layer and minimum thickness of feed layer, and judged result is sent to described thickness controlling unit and frequency control unit;
Described thickness controlling unit is used for when after adjustment, described thickness of feed layer is more than or equal to described maximum thickness of feed layer, or, when after regulating, described thickness of feed layer is less than or equal to described minimum thickness of feed layer, stop regulating thickness of feed layer;
Described frequency control unit is used for, when described thickness of feed layer is more than or equal to described maximum thickness of feed layer after regulating, reducing the frequency of main exhauster; When described thickness of feed layer is less than or equal to described minimum thickness of feed layer after regulating, increase the frequency of main exhauster.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103697699B (en) * | 2013-12-26 | 2015-03-11 | 中冶长天国际工程有限责任公司 | Method and system for controlling sintering end point |
| CN103759536B (en) * | 2014-02-20 | 2015-12-30 | 莱芜钢铁集团有限公司 | A kind of sintering system and sintering indice method thereof |
| CN105588440B (en) * | 2014-10-20 | 2017-09-22 | 宝山钢铁股份有限公司 | Sintering pallet method for detecting position and device |
| CN112033172B (en) * | 2020-09-07 | 2022-07-22 | 无锡智澄电气科技有限公司 | Frequency adjusting method for sintering main exhaust fan |
| CN114774679A (en) * | 2022-04-01 | 2022-07-22 | 安阳钢铁股份有限公司 | Method for controlling thermal state of sinter bed |
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