CN113325885A - 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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- CN113325885A CN113325885A CN202110604154.1A CN202110604154A CN113325885A CN 113325885 A CN113325885 A CN 113325885A CN 202110604154 A CN202110604154 A CN 202110604154A CN 113325885 A CN113325885 A CN 113325885A
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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 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; 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 adding amount can fluctuate with the measured moisture content, 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 sticking of ore tanks, and influence the accuracy of the ingredients and the uniformity of the mixture.
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 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.
Further, the raw material quantity and the moisture content are obtained by the material conveying and tracking processing of the material 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 primary mixed water adding amount is obtained.
And further, if the water content of the secondary mixing target is larger than the estimated water content of the secondary mixture, 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 solved, 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 an estimate of the amount of material to be fed is proposed.
The method mainly comprises the following steps:
acquiring the quantity of raw materials and the moisture content of the raw materials 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 water adding amount of the primary mixing and the water adding amount of the secondary mixing; 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 materials, 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 high 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 can be partially evaporated under the influence of the high temperature of the workshop, so that the moisture content is reduced; it is also possible to absorb some of the floating water vapor in the more water vapor-rich, higher humidity sections, resulting in an increase in the moisture content inside the material.
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 example, with reference to fig. 1, the formula of the moisture value PV1 of the primary mix is estimated 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 is the real-time blanking amount corresponding to the original water content rate of each material, and the unit is t/H.
Referring to fig. 2, the formula of the moisture value PV2 of the estimated 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 and SV2 are used as the target moisture contents of the first and second mixers respectively for the output of the mixes, and the water addition amount is determined as follows:
the calculation of the water addition amount YL of the primary mixer is as follows:
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 primary mixing target water content is obtained, removing the water content of the original material to be used as primary mixing 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 mixed material; and after the secondary mixed target water content is obtained, removing the water content of the original material and the primary mixed water adding amount to be used as a 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: the amount of each material discharged and the moisture 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# mixing ore bin | 115.99 | 116 | 8.99 |
| 3# mixing ore bin | 116.11 | 118 | 8.9 |
| 4# mixing 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 lime bin | 20.93 | 20.86 | 0 |
| 14# quick lime bin | 0 | 0 | 0 |
| 15# return mine storehouse | 196.34 | 195.72 | 0 |
| 16# return mine bin | 0 | 0 | 0 |
| 17# quick lime bin | 21.04 | 21 | 0 |
| 18# Green stoneAsh 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-the sum of the moisture content corresponding to the amount of each material fed-out, namely: 62.53 percent;
SV1, 6.8% for the first mixed water and 8.9% for the second mixed water for SV 2;
at this time, YL: a mixed water flow is calculated to be 4.68m3The flow rate of EL/water mixture is 21.6m3/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 reduction is 1.59%, the average ton ore and fresh water consumption of the sintering machine in 9-12 months is 0.135t/t, the average ton ore and fresh water consumption is 0.005t/t compared with the average value in 1-4 months, and the annual fresh water amount is about 24700 tons.
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.
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;
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.
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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