CN113325885B - Sintering mixture water adding method based on feed amount estimation - Google Patents
Sintering mixture water adding method based on feed amount estimation Download PDFInfo
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- CN113325885B CN113325885B CN202110604154.1A CN202110604154A CN113325885B CN 113325885 B CN113325885 B CN 113325885B CN 202110604154 A CN202110604154 A CN 202110604154A CN 113325885 B CN113325885 B CN 113325885B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
Abstract
The disclosure provides a sintering mixture water adding method based on feed amount estimation, which relates to the field of sintering process control and comprises the following steps: the sintering mixture water adding method based on the feed amount estimation comprises the following steps: according to the original material quantity and the water content, the estimated water content of the primary mixture is obtained by combining the primary mixed water adding quantity, and the estimated water content of the secondary mixture is obtained by combining the secondary mixed water adding quantity; acquiring the water content of a primary mixed target, comparing the primary mixed target with the estimated water content, and adjusting the primary mixed water addition amount; acquiring the water content of a secondary mixing target, and comparing the water content of the secondary mixing estimated water content to adjust the water adding amount of the secondary mixing; according to the blanking amount and the original moisture in the early discharging process, the water content of the mixture is estimated, feedback adjustment is performed according to the sintering process, the adverse effect of water vapor on the precision of the moisture meter in a sintering workshop is reduced, and the problem that the moisture meter is out of alignment due to the fact that the water vapor is large is avoided.
Description
Technical Field
The disclosure relates to the field of sintering process control, in particular to a sintering mixture water adding method based on feed amount estimation.
Background
The existing sintering water adding is one of important links in sintering production, the water vapor content in a sintering site is high and is not uniformly distributed, the influence of the water vapor in the site is caused when the water content is detected, the detection precision of a moisture meter is low, the detected water content is inconsistent with the water content in the mixture, and the water adding process of the premix is influenced.
When the measured moisture content is inconsistent with the internal moisture content, the water addition amount fluctuates, so that the subsequent sintering process is unstable; at present, when the measured moisture content is taken as a reference amount of water addition, the moisture content of a sintering material is possibly too low due to too little water addition, raw materials cannot be sufficiently digested in the sintering process, and the granulation effect is influenced; and excessive water addition can cause agglomeration and ore sticking to the ore tank, and the dosing accuracy and the uniformity of the mixture are influenced.
Disclosure of Invention
The purpose of the disclosure is to provide a sintering mixture water adding method based on blanking amount estimation, the water content of the mixture is estimated according to the blanking amount and the original water content in the early discharging process, feedback adjustment is carried out according to the sintering process, and the adverse effect of water vapor in a sintering workshop on the accuracy of a moisture meter is reduced.
In order to realize the purpose, the following technical scheme is adopted:
the sintering mixture water adding method based on the feed amount estimation comprises the following steps:
according to the original material quantity and the moisture content, combining the primary mixed water adding quantity to obtain the estimated moisture content of the primary mixed material, and combining the secondary mixed water adding quantity to obtain the estimated moisture content of the secondary mixed material;
acquiring the water content of a primary mixed target, comparing the primary mixed target with the water content, and predicting and adjusting the primary mixed water adding amount;
and acquiring the water content of the secondary mixing target, and comparing the estimated water content of the secondary mixing to adjust the water adding amount of the secondary mixing.
Furthermore, the raw material quantity and the moisture content are obtained by the material conveying tracking treatment of the feeding bin.
Further, the moisture content in the primary mixed material is the sum of the moisture content of the original material and the water adding amount of the primary mixed material.
And further, acquiring the estimated water content of the primary mixture based on the corrected data of the water content in the primary mixture.
Further, the water content in the secondary mixture is the sum of the water content of the original material, the water adding amount of the primary mixing and the water adding amount of the secondary mixing.
And further, acquiring the estimated water content of the secondary mixture based on the corrected data of the water content in the secondary mixture.
And further, if the primary mixing target water content is larger than the estimated water content of the primary mixture, increasing the primary mixing water adding amount.
And further, after the water content of the primary mixed target is obtained and the water content of the original material is removed, the water content is used as primary mixed water adding amount.
And further, if the water content of the secondary mixing target is greater than the estimated water content of the secondary mixing material, increasing the water adding amount of the secondary mixing.
And further, after the secondary mixing target water content is obtained, removing the water content of the original material and the primary mixing water adding amount to be used as a secondary mixing water adding amount.
Compared with the prior art, the utility model has the advantages and positive effects that:
(1) According to the blanking amount and the original moisture in the early discharging process, the water content of the mixture is estimated, feedback adjustment is performed according to the sintering process, the adverse effect of water vapor in a sintering workshop on the precision of a moisture meter is reduced, the problem that the moisture meter is out of alignment due to large water vapor is avoided, the fluctuation of the actual moisture of the mixture in a reasonable range is ensured, the moderate water adding flow is achieved, and a foundation is laid for the stable control of the subsequent sintering process;
(2) The water adding device is suitable for complex working condition environments of high-temperature production workshops, and based on the blanking amount and the water adding amount, the real-time change of the blanking amount is combined for calculation, so that feedback control is achieved on the water adding amount, the water adding amount can be compared with a measured value of a water content meter, and the whole water adding amount is more reasonable.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
Fig. 1 is a schematic flow chart of a primary mixing and water adding logic in embodiment 1 of the present disclosure;
fig. 2 is a schematic flow chart of the secondary mixing and water adding logic in embodiment 1 of the present disclosure.
Detailed Description
Example 1
In a typical embodiment of the present disclosure, as shown in fig. 1-2, a method for adding water to a sinter mix based on the estimation of the amount of material fed is provided.
The method mainly comprises the following steps:
acquiring the quantity of the original material and the moisture content in the original material according to the raw material conveying tracking of the feeding bin;
obtaining the estimated water content of the primary mixture by combining the primary mixed water adding amount, and obtaining the estimated water content of the secondary mixture by combining the secondary mixed water adding amount;
acquiring the water content of a primary mixed target, comparing the primary mixed target with the water content, and predicting and adjusting the primary mixed water adding amount;
and acquiring the water content of the secondary mixed target, comparing the water content of the secondary mixed target with the estimated water content, and adjusting the water adding amount of the secondary mixed target.
Wherein the total moisture content in the primary mixture is the sum of the original material moisture content and the primary mixed water addition amount; the water content of the original material is determined by the blanking amount of each bin and the monitored original water content in each bin, and the water adding amount of the primary mixture is measured by a flow meter of a water adding pipeline which inputs the primary mixture into a primary mixer.
Similarly, the water content in the secondary mixture is the sum of the water content of the original material, the primary mixed water adding amount and the secondary mixed water adding amount; the water content of the original material is superposed with the water adding amount of the primary mixing, namely the total water content in the sequential mixing material, and the water adding amount of the secondary mixing is measured by a flowmeter of a water adding pipeline input into a secondary mixing machine.
Because the water vapor content in the workshop is higher in the conveying process, the materials are partially exposed in the air of the workshop in the conveying and mixing processes, and the moisture in the materials is possibly influenced by the high temperature of the workshop and is partially evaporated, so that the moisture content is reduced; it is also possible to absorb part of the floating water vapor in the section with higher water vapor concentration and higher humidity, so that the moisture content in the material is increased.
Therefore, in the embodiment, the moisture correction coefficient is introduced, the influence of the environment in the workshop and other factors on the moisture content in the mixing process is considered, the moisture correction coefficient is set based on experience, and the influence of other factors on the calculation of the moisture content in the mixing process is reduced.
In the embodiment, the estimated water content of the primary mixture is obtained based on the corrected data of the water content of the primary mixture; and acquiring the estimated water content of the secondary mixture based on the corrected data of the water content in the secondary mixture.
Specifically, in this embodiment, with reference to fig. 1, the formula for estimating the moisture value PV1 of the primary mix is as follows:
PV1＝(SF+YH)*YX/(YH+ZH)
SF, the total moisture content of the original material, unit t/H;
YH, adding total water flow of the primary mixer, and unit t/H;
ZH is the comprehensive conveying capacity of the mixture, unit t/H;
YX: primary mixing water correction coefficient, unit%;
wherein SF = real-time feed rate corresponding to the original moisture fraction of each material, unit is t/H.
With reference to fig. 2, the formula for estimating the moisture value PV2 of the secondary mix is as follows:
PV2＝(SF+YH+EH)*EX/(YH+ZH+EH)
wherein: SF, the total moisture content of the original material, unit t/H;
EH, the total water adding flow rate of the secondary mixer, unit t/H;
ZH is the comprehensive conveying capacity of the mixture, unit t/H;
EX: second mix moisture correction factor, unit%.
After the estimated water content of the mixture output by the primary mixer and the estimated water content of the mixture output by the secondary mixer are obtained, the estimated water content data are sent to an upper computer and displayed on a display mechanism of the upper computer, and the target water content input from the outside is obtained through the upper computer.
Specifically, SV1 is taken as the target moisture percentage of the mixed material output by the primary mixer, SV2 is taken as the target moisture percentage of the mixed material output by the secondary mixer, and the water addition amount is determined as follows:
the amount of water added to the primary mixer YL was calculated according to the following formula:
YL＝(ZH*SV1/100-SF)/(1-SV1/100)；
and (3) calculating the water adding quantity EL of the secondary mixer according to the following formula:
EL＝((ZH+YL)*SV1/100-SF-YL)/(1-SV2/100)。
with reference to fig. 1 and 2, if the primary mixed target water content is greater than the estimated water content of the primary mixed material, increasing the primary mixed water addition amount; after the water content of the primary mixed target is obtained, removing the water content of the original material to be used as primary mixed water adding amount;
if the water content of the secondary mixed target is larger than the estimated water content of the secondary mixed material, increasing the water adding amount of the secondary mixing; and after the water content of the secondary mixed target is obtained, removing the water content of the original material and the primary mixed water adding amount to serve as the secondary mixed water adding amount.
According to the feeding amount and the original moisture in the early discharging process, the water content of the mixture is estimated, feedback adjustment is performed according to the sintering process, the adverse effect of water vapor on the precision of the moisture meter in a sintering workshop is reduced, the problem that the moisture meter is out of alignment due to large water vapor is avoided, the fluctuation of the actual moisture of the mixture in a reasonable range is ensured, the moderate water adding flow is achieved, and the foundation is laid for the stable control of the subsequent sintering process.
The water adding process in the actual working process is further described by combining the following table:
table (b): the amount of each material discharged and the water content
| Groove number | Set cut-out t/h | Actually cutting out t/h | Water content% |
| 1# blending ore bin | 115.82 | 116 | 8.99 |
| 2# blending ore bin | 115.99 | 116 | 8.99 |
| 3# blending ore bin | 116.11 | 118 | 8.9 |
| 4# blending ore bin | 116 | 117 | 8.99 |
| 5# mixing ore bin | 115.7 | 114.83 | 8.99 |
| 6# mixing ore bin | 0 | 0 | 8.99 |
| 7# coke powder bin | 18.08 | 18.07 | 12 |
| 8# coke powder bin | 18.12 | 18.06 | 12 |
| 9# limestone silo | 48.87 | 49.1 | 6 |
| 10# limestone silo | 0 | 0 | 6 |
| 11# limestone silo | 48.91 | 49.1 | 6 |
| 12# quick lime bin | 0 | 0 | 0 |
| 13# quick limeStorehouse | 20.93 | 20.86 | 0 |
| 14# quick lime bin | 0 | 0 | 0 |
| 15# return mine bin | 196.34 | 195.72 | 0 |
| 16# return mine bin | 0 | 0 | 0 |
| 17# quick lime bin | 21.04 | 21 | 0 |
| 18# quick lime bin | 0 | 0 | 0 |
| 19# sintering powder A | 28.68 | 28 | 0 |
| 20# sintering powder B | 0 | 0 | 0 |
As shown in the table, at this time:
moisture content SF = amount of material fed per material corresponds to the sum of moisture content, i.e.: 62.53 percent;
SV1, the first mixed water content is set to 6.8 percent, and SV2, the second mixed water content is set to 8.9 percent;
at this time, YL: a mixed water flow is calculated to be 4.68m 3 The flow rate of EL/water mixture is 21.6m 3 /h。
According to the algorithm, the stability of the production process of the sintering machine and the stability of the balance of the return ores are improved, the occurrence amount of the return ores is reduced, the return rate in 9-12 months is 22.06%, the average value in 1-4 months is 23.65%, the consumption of the new ore water is reduced by 1.59%, the average ton consumption of the sintering machine in 9-12 months is 0.135t/t, the average ton consumption of the sintering machine in 1-4 months is reduced by 0.005t/t, and the new water amount is about 24700 tons in the year.
The complex operating mode environment that is applicable to the high temperature workshop, on the basis of the unloading volume with add the water yield, combine the real-time change of unloading volume to calculate to realize feedback control to adding the water yield, can be for contrast each other with the moisture meter measuring value, make wholly add the water yield more reasonable.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. The sintering mixture water adding method based on the feed amount estimation is characterized by comprising the following steps of:
according to the original material quantity and the moisture content, combining the primary mixed water adding quantity to obtain the estimated moisture content of the primary mixed material, and combining the secondary mixed water adding quantity to obtain the estimated moisture content of the secondary mixed material;
acquiring the water content of a primary mixed target, comparing the primary mixed target with the water content, and predicting and adjusting the primary mixed water adding amount;
acquiring the water content of the secondary mixed target, comparing the water content of the secondary mixed target with the water content of the pre-estimated secondary mixed target, and adjusting the water adding amount of the secondary mixed target;
the formula for estimating the moisture value PV1 of the primary mixture is as follows:
PV1＝(SF+YH)*YX/(YH+ZH)
SF, the total moisture content of the original material, unit t/H;
YH, adding total water flow of the primary mixer, and unit t/H;
ZH is the comprehensive conveying capacity of the mixture, unit t/H;
YX: correction coefficient of primary mixed water content, unit%;
wherein SF = real-time blanking amount corresponding to original water content of each material, unit is t/H;
the formula for estimating the water content PV2 of the secondary mixture is as follows:
PV2＝(SF+YH+EH)*EX/(YH+ZH+EH)
wherein: SF, the total moisture content of the original material, unit t/H;
EH, the total water adding flow rate of the secondary mixer, unit t/H;
ZH is the comprehensive conveying capacity of the mixture, unit t/H;
EX: secondary mixed moisture correction coefficient, unit%;
the calculation of the water addition amount YL of the primary mixer is as follows:
YL＝(ZH*SV1/100-SF)/(1-SV1/100)；
SV1: outputting the target moisture rate of the mixture by the primary mixer;
and (3) calculating the water adding quantity EL of the secondary mixer according to the following formula:
EL＝((ZH+YL)*SV1/100-SF-YL)/(1-SV2/100)；
SV2 is used as a secondary mixer to output the target moisture rate of the mixture.
2. The method for adding water to a sinter mixture based on the estimate of the blanking amount as claimed in claim 1, wherein the raw material amount and the moisture content are obtained by a feed bin raw material transportation tracking process.
3. The method for adding water to a sinter mix based on the estimate of the feed amount as claimed in claim 1, wherein the moisture content of the primary mix is the sum of the moisture content of the original material and the water added in the primary mix.
4. The method for adding water to a sinter mixture based on the estimate of the blanking amount as claimed in claim 3, wherein the estimate of the water content of the primary mixture is obtained based on the corrected data of the water content of the primary mixture.
5. The method for adding water to a sinter mixture based on the estimate of the blanking amount as claimed in claim 1, wherein the water content in the secondary mixture is the sum of the water content of the original material, the water adding amount of the primary mixture and the water adding amount of the secondary mixture.
6. The method for adding water to the sinter mixture based on the estimate of the blanking amount as claimed in claim 5, wherein the estimate of the water content of the secondary mixture is obtained based on the corrected data of the water content of the secondary mixture.
7. The method for adding water to a sinter mixture based on the estimate of the blanking amount as claimed in claim 1, wherein if the target water content of the primary mixture is greater than the estimated water content of the primary mixture, the water adding amount of the primary mixture is increased.
8. The method for adding water to a sinter mixture based on the estimate of the blanking amount as claimed in claim 7, wherein the water added amount is used as the primary mixed water amount after the water content of the original material is removed after the primary mixed target water content is obtained.
9. The method for adding water to a sinter mixture based on the estimate of the blanking amount as claimed in claim 1, wherein if the target water content of the secondary mixture is greater than the estimated water content of the secondary mixture, the water adding amount of the secondary mixture is increased.
10. The method for adding water to a sinter mixture based on the estimate of the blanking amount as claimed in claim 1, wherein after the target water content of the second mixing is obtained, the water content of the original material and the water amount of the first mixing are removed to be used as the water amount of the second mixing.
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