CN107703743B - Automatic control method of sinter alkalinity - Google Patents
Automatic control method of sinter alkalinity Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000004364 calculation method Methods 0.000 claims abstract description 38
- 238000012937 correction Methods 0.000 claims abstract description 35
- 229910004298 SiO 2 Inorganic materials 0.000 claims abstract description 26
- 230000008569 process Effects 0.000 claims abstract description 5
- 235000019738 Limestone Nutrition 0.000 claims abstract description 4
- 239000006028 limestone Substances 0.000 claims abstract description 4
- 238000007689 inspection Methods 0.000 claims description 7
- 238000013213 extrapolation Methods 0.000 claims 1
- 238000012821 model calculation Methods 0.000 claims 1
- 102000051759 human factor J Human genes 0.000 abstract 1
- 108700008420 human factor J Proteins 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000002994 raw material Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000013441 quality evaluation Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- C22B1/16—Sintering; Agglomerating
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Abstract
本发明公开了一种烧结矿碱度自动控制方法，其包括以下步骤：当已知设定的碱度中线时，根据配料模型计算的CaO含量Ca计算进行流程时间推算得出预测烧结矿CaO推算值；得出修正系数J采纳值；得出烧结矿CaO数值；得出烧结矿SiO2数值；计算出烧结矿CaO应该控制的中线数值；计算出配料模型计算应该得出的CaO中线；用Ca计算中线和Ca计算之间的差值除以预测烧结矿SiO2推算，得出烧结矿碱度修正值；通过更改烧结矿碱度修正值进行配料模型的计算，精准调整石灰石配比，碱度调整完成。其目的是为了提供一种烧结矿碱度自动控制方法，能够解决人工调整不及时、强烈依靠个人经验、调整效果不稳定等问题。
The invention discloses an automatic control method for the basicity of sintered ore, which comprises the following steps: when the set basicity center line is known, calculate the process time according to the CaO content calculated by the batching model, and obtain the predicted CaO of the sintered ore. Calculate the value of correction factor J; get the value of CaO of sinter; get the value of SiO 2 of sinter; calculate the value of the center line that should be controlled by CaO of sinter; Calculate the difference between the midline and the Ca calculation by dividing the predicted sinter SiO 2 to calculate the sinter alkalinity correction value; by changing the sinter alkalinity correction value to calculate the batching model, accurately adjust the limestone ratio, alkalinity The adjustment is complete. The purpose is to provide an automatic control method for sinter basicity, which can solve the problems of untimely manual adjustment, strong dependence on personal experience, and unstable adjustment effect.
Description
技术领域technical field
本发明属于铁矿粉烧结技术领域，具体涉及一种烧结矿碱度自动控制的方法。The invention belongs to the technical field of iron ore powder sintering, and in particular relates to a method for automatic control of basicity of sintered ore.
背景技术Background technique
随着我国冶金行业的发展，高炉不断向大型化发展，大型化高炉对烧结矿质量的要求也越来越高。烧结矿碱度(行业一般用二元碱度来表示，即烧结矿的CaO含量和SiO2含量的比值)作为烧结矿质量评判的一个重要指标，其一级品率和合格率对高炉炉渣碱度的控制及操作影响很大，烧结矿碱度越稳定，高炉铁水质量越好。因此，烧结矿碱度稳定率的提升，对提高高炉铁水质量意义重大。With the development of my country's metallurgical industry, blast furnaces continue to develop into large-scale, and large-scale blast furnaces have higher and higher requirements for sinter quality. The basicity of sinter (generally expressed by binary basicity in the industry, that is, the ratio of CaO content and SiO2 content of sinter) is an important indicator for sinter quality evaluation. The control and operation of the blast furnace have a great influence. The more stable the basicity of the sinter, the better the quality of blast furnace molten iron. Therefore, the improvement of sinter alkalinity stability rate is of great significance to improve the quality of blast furnace molten iron.
传统的碱度控制思路是根据碱度实测值与碱度目标值的差值ΔR进行判断和调整：①一批|ΔR|≥0.05倍，以该批碱度值与目标值为依据进行计算，作“1/2”调整；②一批|ΔR|≥0.03倍，以该批碱度值与目标值为依据进行计算，作“1/3”调整；③连续三批|ΔR|≥0.02倍，以该三批的碱度平均值与目标值为依据进行计算，作“1/3”调整；④连续四批ΔR为正值或负值时，以该四批的碱度平均值与目标值为依据进行计算，作“1/3”或“1/4”调整。由于影响烧结矿碱度的因素较多，如受原料配比变化、成分波动、下料波动等因素影响，传统的检测方法存在调整不及时、强烈依靠个人经验、调整效果不稳定等问题。The traditional idea of alkalinity control is to judge and adjust according to the difference ΔR between the measured value of alkalinity and the target value of alkalinity: ① A batch of |ΔR|≥0.05 times, calculate based on the alkalinity value of this batch and the target value, Make "1/2" adjustment; ② a batch of |ΔR|≥0.03 times, calculate based on the alkalinity value of this batch and the target value, and make "1/3" adjustment; ③Three consecutive batches |ΔR|≥0.02 times , calculate on the basis of the average value of alkalinity of the three batches and the target value, and make “1/3” adjustment; ④ When ΔR is positive or negative for four consecutive batches, the average value of alkalinity of the four batches and the target value are used for the calculation. The value is calculated on the basis of "1/3" or "1/4" adjustment. Due to many factors affecting the basicity of sinter, such as the change of raw material ratio, the fluctuation of components, the fluctuation of blanking and other factors, the traditional detection method has problems such as untimely adjustment, strong dependence on personal experience, and unstable adjustment effect.
发明内容SUMMARY OF THE INVENTION
本发明要解决的技术问题是提供一种烧结矿碱度自动控制方法，能够解决人工调整不及时、强烈依靠个人经验、调整效果不稳定等问题。The technical problem to be solved by the present invention is to provide an automatic control method for sinter basicity, which can solve the problems of untimely manual adjustment, strong dependence on personal experience, and unstable adjustment effect.
本发明烧结矿碱度自动控制方法，包括以下步骤：The automatic control method for basicity of sintered ore of the present invention comprises the following steps:
步骤S1：当已知设定的碱度中线时，根据配料模型计算的CaO含量Ca计算进行流程时间推算得出预测烧结矿CaO推算值；Step S1: when the set basicity center line is known, calculate the process time according to the CaO content calculated by the batching model to obtain the predicted value of CaO of the predicted sinter;
步骤S2：根据烧结矿检化验情况得到修正系数J，对修正系数J进行差值逻辑关系判定，得出修正系数J采纳值，用J采纳表示；Step S2: obtain the correction coefficient J according to the sintered ore inspection and test situation, and determine the difference logical relationship on the correction coefficient J, and obtain the adopted value of the correction coefficient J, which is expressed by J adoption ;
步骤S3：用Ca计算乘以修正系数J采纳，得出实际能够生产出的烧结矿CaO数值，用Ca核算表示；Step S3: Multiply the correction coefficient J by Ca calculation to obtain the CaO value of the sinter that can actually be produced, which is represented by Ca calculation ;
步骤S4：追踪烧结矿SiO2数值，以10批求均值法作为追踪计算，得出用于碱度计算的烧结矿SiO2数值，用烧结矿SiO2推算表示；Step S4: track the SiO 2 value of the sinter, and use the 10 batch average method as the tracking calculation to obtain the SiO 2 value of the sinter for basicity calculation , which is expressed by the calculation of the SiO 2 of the sinter;
步骤S5：根据烧结矿SiO2推算和烧结矿碱度中线R中线，计算出烧结矿CaO应该控制的中线数值，用Ca中线表示；Step S5: According to the calculation of sintered ore SiO 2 and the sintered ore basicity center line R center line , calculate the center line value that should be controlled by the sintered ore CaO, which is represented by the Ca center line ;
步骤S6：根据Ca中线和配料模型计算CaO的对应关系，计算出配料模型计算应该得出的CaO中线，用Ca计算中线表示；Step S6: Calculate the corresponding relationship of CaO according to the Ca center line and the batching model, calculate the CaO center line that should be obtained by the calculation of the batching model, and use the Ca calculation center line to represent;
步骤S7：用Ca计算中线和Ca计算之间的差值除以预测烧结矿SiO2推算，得出烧结矿碱度修正值，用R修正值表示；Step S7: divide the difference between the Ca calculation center line and the Ca calculation by the predicted sinter SiO 2 calculation to obtain the sinter basicity correction value, which is represented by the R correction value ;
步骤S8：通过更改烧结矿碱度修正值进行配料模型的计算，精准调整石灰石配比，碱度调整完成。Step S8: Calculate the batching model by changing the sinter alkalinity correction value, accurately adjust the limestone proportion, and complete the alkalinity adjustment.
本发明烧结矿碱度自动控制方法，其中所述步骤S2中，根据烧结矿检化验情况得到修正系数J的具体方法为：J＝烧结矿CaO检化验值÷烧结矿预测CaO推算值。The automatic control method for sinter basicity of the present invention, wherein in the step S2, the specific method for obtaining the correction coefficient J according to the sinter inspection and testing situation is: J=sintered ore CaO inspection and testing value÷sintered ore predicted CaO estimated value.
本发明烧结矿碱度自动控制方法，其中所述步骤S2中，对修正系数J进行差值逻辑关系判定的具体方法为：对修正系数J进行差值0.01判定，当差值在0.01范围内时，J采纳＝J，反之则J采纳＝J±0.01。The automatic control method for sinter basicity of the present invention, wherein in the step S2, the specific method for determining the difference logical relationship for the correction coefficient J is: determining the correction coefficient J with a difference value of 0.01, when the difference value is within the range of 0.01 , J adopts = J, otherwise J = J ± 0.01.
本发明烧结矿碱度自动控制方法，其中所述步骤S5中，根据烧结矿SiO2推算和烧结矿碱度中线R中线计算Ca中线的方法为：Ca中线＝SiO2推算×R中线。The automatic control method for sinter basicity of the present invention, wherein in the step S5, the method for calculating the Ca center line according to the sinter SiO 2 calculation and the sinter basicity center line R center line is: Ca center line =SiO 2 calculation ×R center line .
本发明烧结矿碱度自动控制方法，其中所述步骤S6中，根据Ca中线和配料模型计算CaO的对应关系计算Ca计算中线的方法为：Ca计算中线＝Ca中线÷J采纳。The automatic control method for sinter basicity of the present invention, wherein in the step S6, the method for calculating the Ca calculation center line according to the corresponding relationship between the Ca center line and the batching model to calculate the Ca calculation center line is: Ca calculation center line =Ca center line ÷ JAdopt .
本发明经过大量实验，确定了优化算法，能够自适应原料成分波动、下料波动以及过程控制因素，对烧结配比做出精准调整，实现烧结矿碱度的自动调整，提高烧结矿碱度控制稳定率。After a large number of experiments, the invention has determined the optimization algorithm, which can adapt to the fluctuation of raw material composition, the fluctuation of cutting material and the process control factors, make precise adjustments to the sintering ratio, realize the automatic adjustment of the basicity of the sinter, and improve the control of the basicity of the sinter. stability rate.
下面结合附图对本发明作进一步说明。The present invention will be further described below in conjunction with the accompanying drawings.
附图说明Description of drawings
图1是本发明实施例提供的一种烧结矿碱度自动控制方法的流程图；Fig. 1 is the flow chart of a kind of automatic control method of sinter basicity provided by the embodiment of the present invention;
图2是本发明实施例中的预测烧结矿CaO推算值程序实现流程图；Fig. 2 is the realization flow chart of the predicted sintered ore CaO estimated value program in the embodiment of the present invention;
图3是本发明实施例中的关键算法修正系数J采纳值优化算法实验结果。FIG. 3 is the experimental result of the optimization algorithm of the adopted value of the correction coefficient J of the key algorithm in the embodiment of the present invention.
具体实施方式Detailed ways
如图1所示，并结合图2所示，本发明烧结矿碱度自动控制方法，该方法通过PLC等设备构成的一级控制系统执行，包括以下步骤：As shown in Figure 1 and in conjunction with Figure 2, the automatic control method of sinter basicity of the present invention, the method is executed by a first-level control system composed of equipment such as PLC, and includes the following steps:
步骤S1：当已知设定的碱度中线时，根据配料模型计算的CaO含量Ca计算进行流程时间推算得出预测烧结矿CaO推算值；Step S1: when the set basicity center line is known, calculate the process time according to the CaO content calculated by the batching model to obtain the predicted value of CaO of the predicted sinter;
步骤S2：根据烧结矿检化验情况得到修正系数J，对修正系数J进行差值逻辑关系判定，得出修正系数J采纳值，用J采纳表示；Step S2: obtain the correction coefficient J according to the sintered ore inspection and test situation, and determine the difference logical relationship on the correction coefficient J, and obtain the adopted value of the correction coefficient J, which is expressed by J adoption ;
步骤S3：用Ca计算乘以修正系数J采纳，得出实际能够生产出的烧结矿CaO数值，用Ca核算表示；Step S3: Multiply the correction coefficient J by Ca calculation to obtain the CaO value of the sinter that can actually be produced, which is represented by Ca calculation ;
步骤S4：追踪烧结矿SiO2数值，以10批求均值法作为追踪计算，得出用于碱度计算的烧结矿SiO2数值，用烧结矿SiO2推算表示；Step S4: track the SiO 2 value of the sinter, and use the 10 batch average method as the tracking calculation to obtain the SiO 2 value of the sinter for basicity calculation , which is expressed by the calculation of the SiO 2 of the sinter;
步骤S5：根据烧结矿SiO2推算和烧结矿碱度中线R中线，计算出烧结矿CaO应该控制的中线数值，用Ca中线表示；Step S5: According to the calculation of sintered ore SiO 2 and the sintered ore basicity center line R center line , calculate the center line value that should be controlled by the sintered ore CaO, which is represented by the Ca center line ;
步骤S6：根据Ca中线和配料模型计算CaO的对应关系，计算出配料模型计算应该得出的CaO中线，用Ca计算中线表示；Step S6: Calculate the corresponding relationship of CaO according to the Ca center line and the batching model, calculate the CaO center line that should be obtained by the calculation of the batching model, and use the Ca calculation center line to represent;
步骤S7：用Ca计算中线和Ca计算之间的差值除以预测烧结矿SiO2推算，得出烧结矿碱度修正值，用R修正值表示；Step S7: divide the difference between the Ca calculation center line and the Ca calculation by the predicted sinter SiO 2 calculation to obtain the sinter basicity correction value, which is represented by the R correction value ;
步骤S8：通过更改烧结矿碱度修正值进行配料模型的计算，精准调整石灰石配比，碱度调整完成。Step S8: Calculate the batching model by changing the sinter alkalinity correction value, accurately adjust the limestone proportion, and complete the alkalinity adjustment.
根据碱度修正情况，确定好烧结矿的化学成分，并按含铁原料、熔剂、燃料的化学含量计算出符合要求的配比，然后按照配比准备原料，经过混合、湿润、制粒后，再在烧结机上布料、点火、烧结，最后经过冷却、筛分获得烧结矿成品。According to the basicity correction, determine the chemical composition of the sinter, and calculate the required ratio according to the chemical content of iron-containing raw materials, flux and fuel, and then prepare the raw materials according to the ratio, after mixing, wetting and granulation, Then, on the sintering machine, the material is distributed, ignited, sintered, and finally cooled and screened to obtain the finished sintered ore.
本发明烧结矿碱度自动控制方法，其中所述步骤S2中，根据烧结矿检化验情况得到修正系数J的具体方法为：J＝烧结矿CaO检化验值÷烧结矿预测CaO推算值。The automatic control method for sinter basicity of the present invention, wherein in the step S2, the specific method for obtaining the correction coefficient J according to the sinter inspection and testing situation is: J=sintered ore CaO inspection and testing value÷sintered ore predicted CaO estimated value.
本发明烧结矿碱度自动控制方法，其中所述步骤S2中，对修正系数J进行差值逻辑关系判定的具体方法为：对修正系数J进行差值0.01判定，当差值在0.01范围内时，J采纳＝J，反之则J采纳＝J±0.01。The automatic control method for sinter basicity of the present invention, wherein in the step S2, the specific method for determining the difference logical relationship for the correction coefficient J is: determining the correction coefficient J with a difference value of 0.01, when the difference value is within the range of 0.01 , J adopts = J, otherwise J = J ± 0.01.
如图3所示，其为本发明实施例中的关键算法修正系数J采纳值优化算法实验结果。As shown in FIG. 3 , it is the experimental result of the adopted value optimization algorithm of the key algorithm correction coefficient J in the embodiment of the present invention.
本发明烧结矿碱度自动控制方法，其中所述步骤S5中，根据烧结矿SiO2推算和烧结矿碱度中线R中线计算Ca中线的方法为：Ca中线＝SiO2推算×R中线。The automatic control method for sinter basicity of the present invention, wherein in the step S5, the method for calculating the Ca center line according to the sinter SiO 2 calculation and the sinter basicity center line R center line is: Ca center line =SiO 2 calculation ×R center line .
本发明烧结矿碱度自动控制方法，其中所述步骤S6中，根据Ca中线和配料模型计算CaO的对应关系计算Ca计算中线的方法为：Ca计算中线＝Ca中线÷J采纳。The automatic control method for sinter basicity of the present invention, wherein in the step S6, the method for calculating the Ca calculation center line according to the corresponding relationship between the Ca center line and the batching model to calculate the Ca calculation center line is: Ca calculation center line =Ca center line ÷ JAdopt .
如图1所示，所述步骤S4中，追踪烧结矿SiO2数值X＝AVERAGE，以10批求均值法作为追踪计算，得出用于碱度计算的烧结矿SiO2数值，用烧结矿SiO2推算表示，SiO2推算即等于上述的数值X，下表是关键算法烧结矿SiO2推算优化算法实验结果。As shown in Figure 1, in the step S4, the sinter SiO 2 value X=AVERAGE is tracked, and the 10 batch average method is used as the tracking calculation to obtain the sinter SiO 2 value for basicity calculation, and the sinter SiO 2 value is obtained. 2 The calculation means that the calculation of SiO 2 is equal to the value X above.
本发明经过大量实验，确定了优化算法，能够自适应原料成分波动、下料波动以及过程控制因素，对烧结配比做出精准调整，实现烧结矿碱度的自动调整，提高烧结矿碱度控制稳定率。After a large number of experiments, the invention has determined the optimization algorithm, which can adapt to the fluctuation of raw material composition, the fluctuation of cutting material and the process control factors, make precise adjustments to the sintering ratio, realize the automatic adjustment of the basicity of the sinter, and improve the control of the basicity of the sinter. stability rate.
本发明从模糊控制，自适应调整的角度出发，提供了一种烧结矿碱度自动控制方法。本发明以“模糊控制”思想为指导，依烧结工艺理论为基础，根据原料成分和烧结矿成分，进行烧结矿碱度自动调整控制，提高烧结矿的碱度稳定率。The present invention provides an automatic control method for the basicity of sintered ore from the perspective of fuzzy control and self-adaptive adjustment. The invention is guided by the idea of "fuzzy control", based on the theory of sintering process, and according to the raw material composition and the composition of the sintered ore, to automatically adjust and control the basicity of the sintered ore, so as to improve the basicity stability rate of the sintered ore.
以上所述的实施例仅仅是对本发明的优选实施方式进行描述，并非对本发明的范围进行限定，在不脱离本发明设计精神的前提下，本领域普通技术人员对本发明的技术方案作出的各种变形和改进，均应落入本发明权利要求书确定的保护范围内。The above-mentioned embodiments merely describe the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, those of ordinary skill in the art can make various modifications to the technical solutions of the present invention. Variations and improvements should fall within the protection scope determined by the claims of the present invention.
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