CN102063551B - Method for simulating segregation numerical value of blast furnace distributing charge level - Google Patents
Method for simulating segregation numerical value of blast furnace distributing charge level Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000005204 segregation Methods 0.000 title claims abstract description 34
- 238000009826 distribution Methods 0.000 claims abstract description 24
- 238000004364 calculation method Methods 0.000 claims abstract description 4
- 238000004088 simulation Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 13
- 239000004744 fabric Substances 0.000 description 13
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- 239000012467 final product Substances 0.000 description 2
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- 238000004458 analytical method Methods 0.000 description 1
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- 239000003034 coal gas Substances 0.000 description 1
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Abstract
The invention discloses a method for simulating a segregation numerical value of a blast furnace distributing charge level, belonging to the technical field of blast furnace distributing digital analogy. The method comprises the steps of: by adopting a reverse solution process, firstly, determining a furnace charge filling curve and then carrying out iteration solution on a slide curved surface; respectively calculating the shapes of three-stage process charge levels on the left and the right sides by using the depth value of a lateral charge line, and saving a charge level equation; determining the furnace charge filling curved surface on the basis of the lateral charge level equation, and calculating the filling quantity of furnace charge; carrying out iterative search to determine the slide curved surface of the furnace charge by using the furnace charge filling quantity as a target value till the sliding quantity is equal to the filling quantity, thereby obtaining a complete and continuous sliding-filling curved surface; and integrating the furnace charge sliding curved surface obtained through calculation, the filling curved surface and the original lateral charge level to form a new charge level in an entire furnace throat diameter range so as to complete the charge level segregation correction. The method is suitable for the charge level correction of various types of distributing models and can provide references for blast furnace operators to carry out distributing regulation and gas flow distribution improvement.
Description
Technical field
The invention belongs to blast furnace material distribution digital-to-analogue technical field; Be particularly related to a kind of blast furnace material distribution charge level segregation method for numerical simulation; Charge level segregation numerical simulation based on blast furnace material distribution theory, slight slope stable theory is applicable to charge level correction and simulation under the large blast furnace segregation distribution situation.
Background technology
Blast furnace gas distributes, and receives to a great extent about burden distribution, for realizing accurately controlling burden distribution; Need to analyze the physical phenomenon that influences burden distribution in the cloth process; Understand the burden distribution situation in the stove, because shape of charge level can't intuitively observed and detect to the leakproofness of blast furnace; Must be by mathematical method, the burden distribution model of exploitation closing to reality.Analogy model about cloth is existing many, and mostly only simulate, or think that the bed of material distribution of the right and left is symmetrical to the half of bed of material, and for whole furnace throat zone bed of material distribution situation research under the cloth segregation situation seldom.
The cloth segregation is meant that the right and left stockline degree of depth is different, is mainly caused by the cloth mode of operation, and cloth segregation situation is particularly outstanding in the large blast furnace performance.Under the situation of cloth segregation; It is diverse that the bed of material of the right and left distributes; And can squint in the position of center funnel area; Shape of charge level also can change, and for the shape of correct simulation segregation charge level, need carry out deep research to the physical motion process of segregation distribution process furnace charge.
Summary of the invention
The object of the present invention is to provide a kind of blast furnace material distribution charge level segregation method for numerical simulation; This method has taken into full account the change mechanism of charge level under the cloth segregation situation; For the furnace charge slippage what, in the slipping each link action, after the slippage charge level and charge level segregation to blast furnace radially the quantitative analysis of the influence that distributes of ore coke ratio etc. further investigate; Can the slippage of careful simulation furnace charge, fill the physical motion process that forms new charge level, and then can realize the bed of material distribution situation in whole furnace throat zone is simulated.
The present invention is based on blast furnace material distribution theory, stability of slope theory, the physical motion process that the furnace charge slippage is filled during the segregation of simulation charge level adopts reverse solution procedure, promptly confirms furnace charge filling curved surface earlier, carries out the iterative of slippage curved surface again, and performing step is following:
(1) with left and right sides stockline depth value, calculate the three-stage process shape of charge level of the right and left respectively, preserve the charge level equation;
(2) on the charge level equations based of the left and right sides, confirm furnace charge filling curved surface, and calculate the furnace charge loading;
(3) be desired value with the furnace charge loading, iterative search, confirm furnace charge slippage curved surface, equate with loading up to the furnace charge slippage, thereby obtain complete continuous slippage-filling curved surface;
(4) the furnace charge slippage curved surface that calculates, filling curved surface and former left and right sides charge level are integrated, formed the new charge level of whole throat diameter scope, accomplish charge level segregation correction;
(5) preserve final charge level equation.
The physical motion process that the furnace charge slippage is filled during the charge level segregation, analogy method is following:
The F point is the intersection point of left side three-stage process charge level and blast furnace center line; The H point is the intersection point of the right three-stage process charge level and blast furnace center line; Suppose that the AB circular arc is the slip circle face that iterative computation is confirmed; Take place slippage furnace charge will along the gradient equal angle of internal friction Φ and with the tangent slope EF of slip circle face AB to the blast furnace central slide, so furnace charge slippage curved surface is AEF; When the furnace charge of slip region AEF when the blast furnace center position slides, constantly fill, form and fill curved surface FG ', the furnace charge slippage is filled the final shape of charge level that forms and is AEFG '; The actual conditions that the furnace charge slippage was filled when such simulation process can reflect segregation distribution have truly not only been avoided wrong filling, also meet the physical motion rule more.
Described reverse solution procedure is promptly confirmed furnace charge filling curved surface earlier, carries out finding the solution of slippage curved surface again.Concrete performing step is: at first can calculate slope EF by F point coordinate and furnace charge angle of internal friction Φ; With the F point is that the point of contact fits circular arc; Make circular arc both tangent with EF, also tangent with straight line HG, the point of contact is G '; The filling curved surface that obtains like this is FG ', calculates the furnace charge loading of fill area FG ' H thus; Be desired value with the furnace charge loading then, iterative search slip circle face AB, confirm furnace charge slippage curved surface AEF, and calculate the furnace charge slippage, equate with loading up to slippage; At last the furnace charge slippage curved surface AEF that calculates, filling curved surface FG ' are integrated with former left and right sides charge level, form the new charge level MAEFG ' N of whole throat diameter scope.
The concrete steps of described iterative search slip circle face AB are: the C point is the waypoint of three-stage process charge level; P is CD perpendicular line and the horizontal intersection point of FP, trying to achieve on the basis of filling curved surface FG ' and furnace charge loading, is starting point with P; (0.01m～0.1m) divides grid at the horizontal vertical interval along the upper right side; Be center of circle O with certain node in the grid again, make circular arc AB, tangent with EF; AB as possible slip circle face, is obtained possible slippage curved surface AEF, calculates the furnace charge slippage of AEF slip region, with this loop iteration search, up to the furnace charge slippage with till loading equates.
The computing method of described furnace charge slippage and loading are following: as shown in Figure 2; Adopt slices method that slip region and fill area are divided; With the slip region is example; At a distance from 0.01m the AEF zone is divided into some annular concentric thin slices from the beginning of A point is every, calculates the volume of each micro unit respectively, summation gets final product again.
Beneficial effect of the present invention:
The present invention is a kind of charge level segregation method for numerical simulation;, slight slope stable theory theoretical with cloth is the basis, the physical motion process of furnace charge during through the segregation of analysis and research cloth, the concrete grammar of proposition segregation charge level correction; Can realize the numerical simulation of whole furnace throat regional segregation charge level distribution situation; Compare traditional cloth model, closing to reality more can carry out the cloth adjustment for the blast furnace operating person, improve the coal gas distributions foundation is provided.Limitation is little, is applicable to the charge level correction of all kinds cloth model.
Description of drawings
Fig. 1 is a charge level segregation analog physical model synoptic diagram of the present invention.
Fig. 2 is an iterative search slip circle face method synoptic diagram of the present invention.
Embodiment
Fig. 1 and Fig. 2 are a kind of embodiment of the present invention, carry out detailed explanation below in conjunction with accompanying drawing.
The physical motion process that the furnace charge slippage is filled during at first to the charge level segregation is described in detail: as shown in Figure 1; The F point is the intersection point of left side three-stage process charge level and blast furnace center line; The H point is the intersection point of the right three-stage process charge level and blast furnace center line; Suppose that the AB circular arc is the slip circle face that iterative computation is confirmed, take place slippage furnace charge will along the gradient equal angle of internal friction Φ and with the tangent slope EF of slip circle face AB to the blast furnace central slide, so furnace charge slippage curved surface is AEF.When the furnace charge of slip region AEF when the blast furnace center position slides, constantly fill, form and fill curved surface FG ', the furnace charge slippage is filled the final shape of charge level that forms and is AEFG '.The actual conditions that the furnace charge slippage was filled when such simulation process can reflect segregation distribution have more truly not only been avoided wrong filling, also meet the physical motion rule more.
The charge level segregation method for numerical simulation that the present invention proposes adopts reverse solution procedure, promptly confirms furnace charge filling curved surface earlier, carries out finding the solution of slippage curved surface again.Concrete performing step is following: as shown in Figure 1; At first can calculate slope EF by F point coordinate and furnace charge angle of internal friction Φ, be that the point of contact fits circular arc with the F point, makes circular arc both tangent with EF; Also tangent with straight line HG; The point of contact is G ', and the filling curved surface that obtains like this is FG ', calculates the furnace charge loading of fill area FG ' H thus; Be desired value with the furnace charge loading then, iterative search slip circle face AB, confirm furnace charge slippage curved surface AEF, and calculate the furnace charge slippage, equate with loading up to slippage; At last the furnace charge slippage curved surface AEF that calculates, filling curved surface FG ' are integrated with former left and right sides charge level, form the new charge level MAEFG ' N of whole throat diameter scope.
The concrete implementation method of described iterative search slip circle face AB is following: as shown in Figure 2, the C point is the waypoint of three-stage process charge level, and P is CD perpendicular line and the horizontal intersection point of FP; Try to achieve on the basis of filling curved surface FG ' and furnace charge loading; With P is starting point, and (0.01m～0.1m) divide grid is center of circle O with certain node in the grid again at the horizontal vertical interval along the upper right side; Make circular arc AB, tangent with EF; AB as possible slip circle face, is obtained possible slippage curved surface AEF, calculates the furnace charge slippage of AEF slip region, with this loop iteration search, up to the furnace charge slippage with till loading equates.
The computing method of described furnace charge slippage and loading are following: as shown in Figure 2; Adopt slices method that slip region and fill area are divided; With the slip region is example; At a distance from 0.01m the AEF zone is divided into some annular concentric thin slices from the beginning of A point is every, calculates the volume of each micro unit respectively, summation gets final product again.
Claims (2)
1. a blast furnace material distribution charge level segregation method for numerical simulation is characterized in that, the physical motion process that the furnace charge slippage is filled during the segregation of simulation charge level; Adopt reverse solution procedure; Confirm furnace charge filling curved surface earlier, carry out the iterative of slippage curved surface again, performing step is following:
(1) with left and right sides stockline depth value, calculate the three-stage process shape of charge level of the right and left respectively, preserve the charge level equation;
(2) on the charge level equations based of the left and right sides, confirm furnace charge filling curved surface, and calculate the furnace charge loading;
(3) be desired value with the furnace charge loading, iterative search slip circle face, confirm furnace charge slippage curved surface, up to the furnace charge slippage with till loading equates, thereby obtain complete continuous slippage-filling curved surface;
(4) the furnace charge slippage curved surface that calculates, filling curved surface and former left and right sides charge level are integrated, formed the new charge level of whole throat diameter scope, accomplish charge level segregation correction;
(5) preserve final charge level equation
The physical motion process that the furnace charge slippage is filled during the charge level segregation; Analogy method is following: the F point is the intersection point of left side three-stage process charge level and blast furnace center line; The H point is the intersection point of the right three-stage process charge level and blast furnace center line; Suppose that the AB circular arc is the slip circle face that iterative computation is confirmed, take place slippage furnace charge will along the gradient equal angle of internal friction Φ and with the tangent slope EF of slip circle face AB to the blast furnace central slide, so furnace charge slippage curved surface is AEF; When the furnace charge of slip region AEF when the blast furnace center position slides, constantly fill, form and fill curved surface FG ', the furnace charge slippage is filled the final shape of charge level that forms and is AEFG '; The actual conditions that the furnace charge slippage was filled when such simulation process can reflect segregation distribution have truly not only been avoided wrong filling, also meet the physical motion rule;
Described reverse solution procedure: confirm furnace charge filling curved surface earlier, carry out finding the solution of slippage curved surface again, concrete performing step is: at first can calculate slope EF by F point coordinate and furnace charge angle of internal friction Φ; With the F point is that the point of contact fits circular arc; Make circular arc both tangent with EF, also tangent with straight line HG, the point of contact is G '; The filling curved surface that obtains like this is FG ', calculates the furnace charge loading of fill area FG ' H thus; Be desired value with the furnace charge loading then, iterative search slip circle face AB, confirm furnace charge slippage curved surface AEF, and calculate the furnace charge slippage, equate with loading up to slippage; At last the furnace charge slippage curved surface AEF that calculates, filling curved surface FG ' are integrated with former left and right sides charge level, form the new charge level MAEFG ' N of whole throat diameter scope;
The computing method of described furnace charge slippage and loading are following: adopt slices method that slip region and fill area are divided; With the slip region is example; At a distance from 0.01m the AEF zone is divided into some annular concentric thin slices from the beginning of A point is every, calculates the volume of each micro unit respectively, again summation.
2. blast furnace material distribution charge level segregation method for numerical simulation according to claim 1, it is characterized in that the concrete steps of described iterative search slip circle face are: the C point is the waypoint of three-stage process charge level; P is CD perpendicular line and the horizontal intersection point of FP, trying to achieve on the basis of filling curved surface FG ' and furnace charge loading, is starting point with P; Horizontal vertical interval 0.01m～0.1m divides grid along the upper right side; Be center of circle O with certain node in the grid again, make circular arc AB, tangent with EF; AB as possible slip circle face, is obtained possible slippage curved surface AEF, calculates the furnace charge slippage of AEF slip region, with this loop iteration search, up to the furnace charge slippage with till loading equates.
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| CN102559965B (en) * | 2012-02-27 | 2013-09-04 | 江苏省沙钢钢铁研究院有限公司 | Method for simulating circumferential segregation of blast furnace burden distribution |
| CN102796835B (en) * | 2012-07-25 | 2013-09-11 | 北京科技大学 | Charge level monitoring method based on data fusion of measured data and cloth model and charge level monitoring system |
| CN105136623A (en) * | 2015-09-17 | 2015-12-09 | 重庆大学 | Potential energy change based method for quantitatively characterizing packing segregation state of particles after falling |
| CN105567893B (en) * | 2016-02-29 | 2018-03-13 | 中冶南方工程技术有限公司 | A kind of charge surface shape in blast emulation mode |
| CN107034327A (en) * | 2017-05-09 | 2017-08-11 | 重庆大学 | Method based on segregation status during mesh generation quantitatively characterizing particles fall |
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| CN101250602A (en) * | 2008-03-20 | 2008-08-27 | 重庆钢铁(集团)有限责任公司 | Blast furnace chute polycyclic distributing method |
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| CN101250602A (en) * | 2008-03-20 | 2008-08-27 | 重庆钢铁(集团)有限责任公司 | Blast furnace chute polycyclic distributing method |
Non-Patent Citations (2)
| Title |
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| 马富涛、吴建.高炉无钟布料模型的改进与发展.《中国计量协会冶金分会2009年年会论文集》.2009,431-435. * |
| 马富涛.无钟布料模型焦炭坍塌数值模拟的研究与创新.《第七届(2009)中国钢铁年会论文集(上)》.2009,303-308. * |
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