Converter steelmaking auxiliary raw material input rule making method

Abstract

The invention relates to the technical field of converter steelmaking production, and discloses a converter steelmaking auxiliary raw material input rule making method which comprises the following steps: making an expert rule table; reading the data of the current heat; reading equipment data of the furnace seat overhead bunker; and according to the furnace data obtained in the step S2, the like. According to the feeding rule formulated by the method, the converter steelmaking auxiliary raw material feeding rule can be automatically formulated, the problems of low efficiency, poor normalization, high misoperation frequency and the like caused by manual formulation are solved, the converter steelmaking quality and efficiency are improved, and meanwhile, the full-automatic production level of converter steelmaking is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of converter steelmaking production, in particular to a method for formulating a converter steelmaking auxiliary material input rule. BACKGROUND

[0002] The main raw materials required for converter steelmaking include main raw materials, auxiliary materials and ferroalloys, wherein the main role of auxiliary materials is to make slag and adjust heat balance, and commonly used auxiliary materials include limestone, light-burned dolomite, synthetic slagging agent and iron ore, etc. The advantages and disadvantages of the auxiliary material input process directly affect the quality and efficiency of smelting, and the auxiliary material input equipment system of the vast majority of domestic steelmaking plants currently mainly includes a high-position stock bin, a vibrating feeder, a weighing hopper and a collection hopper, and the main process is that the auxiliary materials are first discharged from the high-position stock bin to the weighing hopper through the vibrating feeder, then the auxiliary materials are discharged from the weighing hopper to the collection hopper, and finally the auxiliary materials in the collection hopper are input into the converter.

[0003] In order to meet the requirements of steelmaking process such as slagging quality, heat balance and furnace lining damage, a reasonable auxiliary material input rule needs to be formulated in the auxiliary material input operation, i.e. the input order of each auxiliary material, the input batch of each auxiliary material, the time and input amount of each batch, etc. Since the formulation of the rule needs to consider various factors such as auxiliary material variety and quality, stock bin and weighing equipment state, furnace state, molten iron condition and steel grade requirement, the complexity is high, and therefore the formulation of the rule in the vast majority of domestic steelmaking plants still adopts manual mode.

[0004] The manual mode has the disadvantages of high labor intensity, low efficiency, poor material input specification, high frequency of misoperation, low adaptability, etc., which has a negative impact on the improvement of converter steelmaking quality and efficiency, and hinders the full automatic production of converter steelmaking. Therefore, it is urgent to invent a method for formulating a converter steelmaking auxiliary material input rule, which can formulate a reasonable auxiliary material automatic input rule according to the actual situation of converter smelting such as furnace state, molten iron condition and steel grade requirement, so as to improve the process level and automation level of converter auxiliary material input operation, and realize the full automatic production of the converter. SUMMARY

[0005] (I) Technical problems solved

[0006] In view of the deficiencies of the prior art, the present application provides a method for formulating a converter steelmaking auxiliary material input rule, which solves the problem that the manual mode hinders the full automatic production of converter steelmaking due to high misoperation frequency and low adaptability.

[0007] (II) Technical solutions

[0008] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a method for formulating a converter steelmaking auxiliary material input rule, comprising the following steps:

[0009] S1. Develop the expert rule table;

[0010] S2. Read the data for this furnace cycle;

[0011] S3. Read the equipment data of the high-level silo of the furnace base;

[0012] S4. Based on the data of this furnace obtained in step S2, generate status codes according to the rules defined in the status code generation rule table. Then, obtain the input rule codes of each type of by-product raw material according to the correspondence table between status codes and input rule codes. Finally, read the input rule definition parameters of each by-product raw material from the input rule table.

[0013] S5. Based on the parameters of the input rules for each auxiliary raw material obtained in step S4 and the total amount of each auxiliary raw material obtained in step S2, calculate the input rule data for each auxiliary raw material.

[0014] S6. Based on the auxiliary raw material input rule data calculated in step S5, and combined with the equipment data of the high-level silo of the furnace base obtained in step S3, formulate auxiliary raw material input rules.

[0015] Preferably, the established expert rule table includes a status code generation rule table, a status code and input rule code correspondence table, and an input rule table.

[0016] Preferably, the data read for this heat includes furnace number, blowing type code, tuyer status code, target ladle [P] upper limit, molten iron [Si], scrap steel increase [S], heating agent weight, molten iron temperature, required total oxygen, and the variety codes and total amount of various auxiliary raw materials required.

[0017] Preferably, the equipment data read from the high-level material bins of the furnace base includes the number of each high-level material bin, the corresponding auxiliary raw material type code, priority, and the corresponding weighing hopper number, etc.

[0018] (III) Beneficial Effects

[0019] This invention provides a method for formulating rules for the input of by-products in converter steelmaking, which has the following beneficial effects:

[0020] The feeding rules established by this invention can realize the automatic formulation of the input rules for by-products in converter steelmaking, solving the problems of low efficiency, poor standardization, and high frequency of misoperation caused by manual formulation, thereby improving the quality and efficiency of converter steelmaking, and at the same time improving the level of fully automated production in converter steelmaking. Attached Figure Description

[0021] Figure 1 This is the status code generation rule table for this invention.

[0022] Figure 2 This is a table showing the correspondence between status codes and input rule codes in this invention.

[0023] Figure 3 This is the input rule table for the present invention.

[0024] Figure 4 A flowchart for formulating the rules for inputting by-products in this invention. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Step 1: Develop the expert rule table

[0027] A status code generation rule table is established, which specifies the rules for generating status codes, including the generation rules for status code characters related to the target ladle [P] upper limit, molten iron [Si], scrap steel increase [S], exothermic agent weight, and molten iron temperature, such as... Figure 1 As shown.

[0028] A table mapping status codes to input rule codes was created. This table specifies the correspondence between status codes and the input rule codes of each auxiliary raw material, such as... Figure 2 As shown.

[0029] An input rule table is established, which specifies the detailed parameters for each input rule, including the F1 feed ratio, the F1 feed upper limit, the F1 feed main silo ratio, the F1 feed main silo upper limit, the initial oxygen content ratio during blowing, the upper limit for each feed during blowing, and the oxygen content interval during blowing. Figure 3 As shown.

[0030] Step 2, Read the data for this furnace cycle.

[0031] From the converter L2 system database, based on the furnace batch plan number, read the data for this furnace batch, mainly including: furnace base number, blowing type code, tuyere status code, target ladle [P] upper limit (ppm), molten iron [Si] (ppm), scrap steel increase [S] amount (ppm), exothermic agent weight (kg), molten iron temperature (°C), and required total oxygen (Nm³). 3 ), the variety codes of all required byproducts and the total amount (kg) to be added.

[0032] Step 3: Read the equipment data from the high-level silo.

[0033] From the converter L2 system database, based on the furnace base number, read the equipment data of the high-level material bins for that furnace base, including: the number of each high-level material bin, the corresponding auxiliary raw material type code, priority, and the corresponding weighing hopper number, etc.

[0034] Step 4, Generate status codes

[0035] The status code is an 8-character string. The first character represents the furnace base number status, the second the blowing type status, the third the tuyer status, the fourth the target ladle [P] upper limit status, the fifth the molten iron [Si] status, the sixth the scrap steel increase [S] status, the seventh the exothermic agent weight status, and the eighth the molten iron temperature status. The first character of the status code equals the furnace base number, the second the blowing type code, and the third the tuyer status code. Characters 4 through 8 are generated based on the data obtained in step 2, according to the status code generation rule table defined in step 1. The generation method is as follows: determine the corresponding status code character based on the data item name and the upper and lower limits of the data item value.

[0036] After determining the status code, the input rule code for each type of by-product is determined according to the correspondence between the status code and the input rule code for each type of by-product as specified in the status code and input rule code correspondence table.

[0037] After determining the input rule codes for each type of by-product, the input rule setting parameters for each by-product are read from the input rule table, including the F1 input ratio (%), F1 input limit (kg), F1 input main silo ratio (%), F1 input main silo limit (kg), oxygen content ratio at the start of input during blowing (%), maximum input limit per cycle during blowing (kg), and oxygen content interval during blowing (Nm). 3 ).

[0038] Step 5: Calculate the input rules for each auxiliary raw material.

[0039] Based on the parameters for the input rules of each auxiliary raw material obtained in step 3 and the addition amount of each type of auxiliary raw material obtained in step 2, calculate the input rule data of each auxiliary raw material. The calculation of the input rule data of a certain auxiliary raw material is used as an example. The calculation method of the input rule data of other auxiliary raw materials is the same.

[0040] First, calculate the total amount of raw material F1 to be fed:

[0041]

[0042] Then calculate the weight of the auxiliary raw material F1 fed into the main material silo:

[0043]

[0044] Then calculate the weight of the auxiliary raw material F1 fed into the auxiliary material silo:

[0045]

[0046] Then calculate the total amount of feed used in the blowing process of this auxiliary raw material:

[0047]

[0048] Then calculate the total number of batches fed into the blowing process of this auxiliary raw material:

[0049]

[0050] Then calculate the weight of each feed item added during the blowing process of this auxiliary raw material:

[0051]

[0052] Finally, calculate the initial oxygen content during the blowing process of this auxiliary raw material:

[0053]

[0054] In the above formula: W sum W represents the total amount of this by-product required. f1-sum W represents the total amount of raw material F1 fed into the plant. f1-up This indicates the upper limit of the input of the auxiliary raw material F1, R. f1-sum This indicates the proportion of raw material F1 added, W f1-main This indicates the weight of the auxiliary raw material F1 fed into the main feed silo, W. f1-sub This indicates the weight of the auxiliary raw material F1 fed into the auxiliary material silo, R. f1-main This indicates the proportion of the auxiliary raw material F1 fed into the main feed silo, W. f1-main-up This indicates the upper limit of the main feed silo for the auxiliary raw material F1, W. blowing C represents the total amount of feedstock used in the blowing process of this by-product. blowing W represents the total number of batches of raw materials fed into the blowing process for this auxiliary material. blowing-per-up W represents the maximum amount of feed added per cycle during the blowing of this by-product. blowing-per W represents the weight of each feed item added during the blowing process of this auxiliary raw material. blowing-start R indicates the initial oxygen content during the blowing process. blowing-start V indicates the initial oxygen content during the blowing process. sum-oxy This indicates the total amount of oxygen required.

[0055] Step 6: Formulate rules for the input of by-products

[0056] Based on the auxiliary raw material input rule data calculated in step 4 and the equipment data of the high-level silo of the furnace base obtained in step 3, auxiliary raw material input rules are formulated. The formulation of input rules for a specific auxiliary raw material is illustrated as an example; the method for formulating input rules for other auxiliary raw materials is the same.

[0057] First, determine the silo number to be used for feeding the auxiliary raw material based on the correspondence between the high-level silo number and the auxiliary material name. If the auxiliary raw material requires two silos, determine the primary and secondary silos according to their priority, setting the silo with priority 1 as the primary silo and the silo with priority 2 as the secondary silo. If the auxiliary raw material requires one silo, set that silo as the primary silo and do not set a secondary silo.

[0058] Then, based on the input weight of the main feed silo and the input weight of the auxiliary feed silo for the auxiliary raw material calculated in step 5, the F1 input weight of the main and auxiliary feed silos for the auxiliary raw material is set.

[0059] Finally, based on the total number of batches of materials fed during the blowing process calculated in step 5, the weight of each batch of materials fed during the blowing process, the initial oxygen content at the start of the blowing process, and the oxygen content interval obtained in step 4, the rules for the input of by-products during the blowing process are constructed, such as... Figure 4 As shown in the figure, BatchCount represents the total number of batches fed in the blowing process, WeightPer represents the weight of each batch fed in the blowing process, OxyGdt represents the oxygen interval for each batch fed in the blowing process, OxyStart represents the initial oxygen level for each batch fed in the blowing process, BatchNum represents the batch number, OxyCur represents the oxygen level for each batch fed in the blowing process, BunberNum represents the bin number, and OxySum represents the total oxygen level for the blowing process. Figure 4 As shown:

[0060] ① Set BatchNum to 0, OxyCur to OxyStart, and BunberNum to the main silo number;

[0061] ② Determine if BatchNum is greater than BatchCount. If yes, end the process; otherwise, continue the process.

[0062] ③ Determine if OxyCur is greater than OxySum. If yes, end the process; otherwise, continue the process.

[0063] ④ Set the BunberNum hopper to add the weightPer of this auxiliary raw material when the oxygen content is equal to OxyCur;

[0064] ⑤ When BunkerNum equals the main silo number, set BunberBum to equal the secondary silo number; when BunkerNum equals the secondary silo number, set BunberBum to equal the main silo number.

[0065] ⑥ Increment BatchNum by 1, and increment OxyGdt by OxyCur;

[0066] ⑦ Repeat step ②.

[0067] Example

[0068] A steel plant in China has adopted this method to intelligently identify molten iron ladle numbers. An example of its implementation is as follows:

[0069] For a converter with a nominal capacity of 350 tons, a rule for the input of auxiliary raw materials for the heat number 197883 is formulated.

[0070] First, read the data for this heat: furnace number is 1, blowing type code is 1, tuyer status code is 0, target ladle [P] upper limit is 150ppm, molten iron [Si] is 1976ppm, scrap steel increase [S] is 17ppm, exothermic agent weight is 270kg, molten iron temperature is 1383℃, required total oxygen is 16200Nm3, required auxiliary raw material A weight is 9510kg, required auxiliary raw material B weight is 5700kg, and required auxiliary raw material C weight is 1000kg.

[0071] Then, the parameters of the feeding equipment were read, and the results are shown in the table below.

[0072] Bin No. Scales No. Auxiliary material name Priority 2 2 Sub-raw material C 1 4 3 Sub-raw material B 1 5 3 Sub-raw material H 1 6 3 Sub-raw material I 1 7 3 Sub-raw material A 1 8 4 Sub-raw material B 2 9 4 Sub-raw material C 2 10 4 Sub-raw material A 2 11 5 Sub-raw material D 1 12 5 Sub-raw material F 1 13 5 Sub-raw material E 1 14 5 Sub-raw material G 1

[0073] Then, based on the obtained data for this batch, the status code "11050000" is generated according to the rules defined in the status code generation rule table. Then, according to the correspondence table between status codes and input rule codes, the rule code for auxiliary raw material A is 20, the rule code for auxiliary raw material B is 30, and the rule code for auxiliary raw material C is 12. Finally, the input rule parameters for each auxiliary raw material are read from the input rule table. The results are shown in the table below.

[0074] Sub-raw material name Rule code F1 feeding ratio F1 feeding upper limit F1 feeding main bin ratio F1 feeding main bin upper limit Blowing in the middle of the feeding start oxygen ratio Blowing in the middle of each feeding upper limit Blowing in the middle of the feeding oxygen interval Sub-raw material A 20 70 9000 100 3000 25 1500 2000 Sub-raw material B 30 100 99999 100 500 5 99999 500 Sub-raw material C 12 0 99999 0 0 30 1300 1500

[0075] Then, the input rules for each auxiliary raw material were calculated, and the results are shown in the table below.

[0076]

[0077] Finally, the input rule table was created, and the result is shown in the table below.

[0078]

[0079] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0080] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for formulating rules for the input of by-products in converter steelmaking, characterized in that, Includes the following steps: S1. Develop the expert rule table; S2. Read the data for this furnace cycle; S3. Read the equipment data of the high-level silo of the furnace base; S4. Based on the data of this furnace obtained in step S2, generate status codes according to the rules defined in the status code generation rule table. Then, obtain the input rule codes of each type of by-product raw material according to the correspondence table between status codes and input rule codes. Finally, read the input rule definition parameters of each by-product raw material from the input rule table. S5. Based on the parameters of the input rules for each auxiliary raw material obtained in step S4 and the total amount of each auxiliary raw material obtained in step S2, calculate the input rule data for each auxiliary raw material. S6. Based on the auxiliary raw material input rule data calculated in step S5, and combined with the equipment data of the high-level silo of the furnace base obtained in step S3, formulate auxiliary raw material input rules.

2. The method for formulating rules for inputting by-products in converter steelmaking according to claim 1, characterized in that, The established expert rule tables include a status code generation rule table, a status code and input rule code correspondence table, and an input rule table.

3. The method for formulating rules for inputting by-products in converter steelmaking according to claim 1, characterized in that: The data to be read for this heat includes furnace number, blowing type code, tuyer status code, target ladle [P] upper limit, molten iron [Si], scrap steel increase [S], exothermic agent weight, molten iron temperature, required total oxygen, and the type codes and total amount of various auxiliary raw materials required.

4. The method for formulating rules for inputting by-products in converter steelmaking according to claim 1, characterized in that: The equipment data read from the high-level material bins of the furnace base includes the bin number, the corresponding auxiliary raw material type code, priority, and the corresponding weighing hopper number.

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