A method and system for generating RH alloy running path

Abstract

The present invention discloses a method for generating an RH alloy running path, comprising the following steps: (1) obtaining the alloy to be added to the RH, the alloy weight and the alloy density; (2) reading the data of each silo hopper and the correlation between the silos hoppers, obtaining candidate feeding paths for various alloys, and forming the maximum alloy weight and alloy volume corresponding to the candidate feeding paths; (3) forming a feeding path with a shorter feeding time for each alloy, and the feeding path is composed of at least one candidate feeding path. The present invention provides a method for intelligently generating an RH alloy running path and is generally applicable, which can adapt to various on-site situations and is suitable for complex systems where multiple silos and hoppers coexist.

Description

Technical Field

[0001] The present invention belongs to the technical field of iron and steel metallurgy, and more specifically, the present invention relates to a method and system for generating a RH alloy running path. Background Art

[0002] RH refining furnace is a kind of high-efficiency refining equipment, which has multiple refining functions such as decarburization, degassing, adjusting the chemical composition of molten steel, adjusting temperature, removing inclusions, etc. It plays an extremely important role in the production of silicon steel, automobile plates, home appliance plates and other steels. In the smelting process of RH refining furnace, the chemical composition of molten steel is mostly adjusted by adding alloys. Due to the wide variety of alloys, and the alloys need to be weighed and transferred before being put into molten steel, and before adding molten steel, the vacuum hopper needs to be evacuated, and the hopper pressure can only be put in when it is approximately equal to the pressure in the vacuum tank. Therefore, the RH alloy silo system structure is complex; in addition, steel mills will design the silo system of RH refining furnace according to the product structure, so the RH silo system structure often has great differences. During the smelting process, the operator will add alloys according to the actual needs, the working status of the silo, and whether the silo is blocked, which further complicates the alloy weighing, transfer and addition operations.

[0003] The RH alloy silo system consists of the following: 1) High-level silo: It has the function of storing alloys and is located at the top of the RH refining furnace. Multiple silos can be configured according to the RH product structure; 2) Weighing hopper: It is used to weigh the alloys stored in the high-level silo. The weighed alloys are transported to the vacuum hopper via a belt. Multiple silos can be configured according to the number of high-level silos and the number of types of stored alloys; 3) Fast hopper: It has the ability to weigh alloys and is generally used to weigh alloys quickly. Its accuracy is higher than that of the weighing hopper. The weighed alloys are directly transported to the vacuum hopper. The addition of alloys to it during the RH processing is not considered; 4) Vacuum hopper: It receives alloys transported by the weighing hopper and the fast hopper, and has the ability to evacuate and add alloys to the vacuum tank; 5) Direct hopper: It has the ability to weigh alloys and can directly add alloys to the vacuum tank. Since it is connected to the vacuum system, alloys cannot be added to it during the RH smelting process.

[0004] Authorization announcement number: CN 111694323 A, announced "A material preparation control method for RH feeding silo", the purpose of which is to reduce the time for RH alloy preparation. The main idea is to adjust the order of high-level silos and weighing hopper transportation used, so as to shorten the alloy preparation time. The shortcomings of this method are: the alloy feeding path relies on manual estimation and is mainly designed for specific scenarios. In addition, this method is generally used for the silo structure of a single vacuum hopper, and cannot be well adapted to complex silo structures. Summary of the invention

[0005] The present invention provides a method for generating a RH alloy running path, aiming to improve the above-mentioned problem.

[0006] The present invention is implemented as follows: a method for generating a RH alloy running path, the method comprising the following steps:

[0007] (1) Obtain the alloy to be added to RH, the alloy weight and the alloy density;

[0008] (2) reading the data of each silo and hopper and the correlation between the silos and hoppers, obtaining candidate feeding paths for various alloys, and forming the maximum alloy weight and alloy volume corresponding to the candidate feeding paths;

[0009] (3) A feeding path with a shorter feeding time for each alloy is formed, wherein the feeding path is composed of at least one candidate feeding path.

[0010] Furthermore, the priority is used to evaluate the feeding time of each candidate feeding path. The shorter the feeding time, the smaller the priority value assigned.

[0011] Furthermore, there are three types of candidate feeding paths, as follows:

[0012] (1) High-level silo ~ weighing hopper ~ vacuum hopper ~ vacuum tank;

[0013] (2) Quick hopper ~ vacuum hopper ~ vacuum tank;

[0014] (3) Direct hopper ~ vacuum tank.

[0015] Furthermore, the priority value of the candidate feeding path is the sum of the priorities of all silos and hoppers on the candidate feeding path;

[0016] Among them, the priority value of the high-level silo is greater than that of the fast hopper, and the priority value of the fast hopper is greater than that of direct hopper.

[0017] Furthermore, the method for forming candidate feeding paths for various alloys is as follows:

[0018] From the topological diagram of the RH alloy material layer system, high-level silos, fast hoppers and direct hoppers with the same alloy name as the current alloy are obtained. Based on the association between the silos and hoppers, all paths from the above high-level silos, fast hoppers and direct hoppers to the vacuum tank are obtained, which are the candidate feeding paths for the corresponding alloys.

[0019] Furthermore, when the silo or hopper is blocked, the candidate feeding paths associated with the silo or hopper are deleted.

[0020] Furthermore, the method for forming the feeding path of each alloy is as follows:

[0021] (31) arranging all candidate feeding paths of the alloy in order of priority from smallest to smallest;

[0022] (32) detecting whether the maximum alloy weight and the maximum alloy volume of the current candidate feeding path are greater than the weight and volume required by the alloy; if the detection result is yes, adding the current candidate feeding path to the alloy feeding path set to form the feeding path of the alloy, updating the maximum alloy weight and the maximum alloy volume of the relevant candidate feeding path, and updating the weight of the alloy;

[0023] (33) If the detection result is no, the current candidate feeding path is added to the alloy feeding path set, the maximum alloy weight and maximum alloy volume of the relevant candidate feeding path are updated, the weight of the alloy is updated, the next candidate feeding path is used as the current feeding path, and step (32) is executed.

[0024] Furthermore, the candidate feeding paths in the same round among all the feeding paths perform the feeding operation at the same time, and the candidate feeding paths selected in the next round start to be weighed after the corresponding candidate feeding paths selected in the previous round complete the material moving operation.

[0025] The present invention is implemented in this way: a method system for generating a RH alloy running path, the system comprising:

[0026] Database, storing data of various silos and hoppers and the relationship between silos and hoppers;

[0027] Input unit, input the alloy to be added to RH, alloy weight and alloy density:

[0028] The processing unit is connected with the input unit and the database, and the processing unit obtains the feeding paths of various alloys based on the above-mentioned RH alloy operation path generation method.

[0029] The present invention provides a generally applicable method for intelligently generating an RH alloy operation path, which can adapt to various on-site situations and is suitable for a complex system in which multiple silos and hoppers coexist. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A flow chart of a method for generating a RH alloy operation path provided by an embodiment of the present invention;

[0031] Figure 2 A schematic diagram of the structure of a RH alloy operation path generation system provided in an embodiment of the present invention;

[0032] Figure 3 A topological diagram of the RH alloy material layer system of Example 1 provided in an embodiment of the present invention;

[0033] Figure 4A topological diagram of the RH alloy layer system of Example 2 provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The specific implementation modes of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0035] Figure 1 A flow chart of a method for generating an RH alloy operation path provided in an embodiment of the present invention, the method specifically comprises the following steps:

[0036] (1) Determine the alloy to be added to RH, the alloy weight and alloy density;

[0037] (2) based on the data of each silo hopper and the correlation between the silos hoppers, obtaining candidate feeding paths for various alloys, and generating the maximum alloy weight and alloy volume corresponding to the candidate feeding paths;

[0038] In an embodiment of the present invention, the high-level hopper data includes: alloy name, priority and locking status; the weighing hopper data includes: weight range, volume range, priority and locking status; the fast hopper data includes: alloy name, priority and locking status, hopper alloy weight; the vacuum hopper data includes: weight range, volume range, priority and locking status; the direct hopper data includes: alloy name, priority, hopper alloy weight and locking status.

[0039] In the embodiment of the present invention, there are three types of feeding paths as follows:

[0040] (1) High-level silo ~ weighing hopper ~ vacuum hopper ~ vacuum tank;

[0041] (2) Quick hopper ~ vacuum hopper ~ vacuum tank;

[0042] (3) Direct hopper ~ vacuum tank.

[0043] Based on the above three types of feeding paths, it can be seen that the entire feeding process mainly consists of three steps, namely weighing, moving materials and adding materials. Moving materials is to move materials from the weighing hopper to the vacuum hopper, and adding materials is to add materials from the vacuum hopper or direct hopper to the vacuum tank.

[0044] Since the feeding path of the high-level silo is longer, the priority value assigned to the high-level silo is generally larger. Of course, when there are multiple high-level silos, the priority value of the high-level silo is adaptively adjusted according to the weighing accuracy of the corresponding weighing hopper of the high-level silo or the material storage capacity of the high-level silo. For example, if the weighing accuracy is high, the priority value assigned is smaller; the feeding path where the direct hopper is located is shorter, and the priority value assigned to the direct hopper is smaller; the feeding path where the fast hopper is located is of medium length, and the priority value assigned to the fast hopper is of medium length.

[0045] The priority value of the feeding path is the sum of the priorities of all silos and hoppers on the feeding path. Since the high-level silo itself has a higher priority value and the feeding path where the high-level silo is located is longer, the priority value of the feeding path (1) is larger and the priority value of the feeding path (3) is smaller. In the present invention, the feeding path with a smaller priority value is preferably selected to shorten the feeding time.

[0046] For each feed alloy, the process of obtaining the candidate feed paths is as follows:

[0047] From the topology diagram of the RH alloy material layer system, obtain the high-level silo, fast hopper and direct hopper with the same alloy name as the current alloy, and obtain all the paths from the high-level silo, fast hopper and direct hopper to the vacuum tank based on the association between the silos and hoppers. The above paths are the candidate feeding paths for the corresponding alloys. When the silo hopper is manually blocked, delete the candidate feeding paths related to the blocked silo hopper in the topology diagram.

[0048] In an embodiment of the present invention, the method for determining the maximum alloy weight and alloy volume corresponding to the candidate feeding path is as follows:

[0049] For the feeding path (1): high-level silo ~ weighing hopper ~ vacuum hopper ~ vacuum tank, the priority, alloy weight, and volume restrictions are as follows:

[0050] Priority = priority of high-level silo + priority of weighing hopper + priority of vacuum hopper;

[0051] Alloy volume limit = min{volume range of weighing hopper, volume range of vacuum hopper};

[0052] Alloy weight limit = min{weighing hopper weight range, vacuum hopper weight range, alloy volume limit * alloy density};

[0053] For the feeding path (2): fast hopper ~ vacuum hopper ~ vacuum tank, its priority, alloy weight limit, and alloy volume limit are as follows:

[0054] Priority = priority of fast hopper + priority of vacuum hopper;

[0055] Alloy volume limit = vacuum hopper volume range;

[0056] Alloy weight limit = min{alloy weight of fast hopper, weight range of vacuum hopper, alloy volume limit * alloy density};

[0057] For the feeding path (3): direct hopper to vacuum tank, the priority and alloy weight limit are as follows:

[0058] Priority = priority of direct hopper;

[0059] Alloy weight limit = alloy weight of direct hopper.

[0060] Since the direct hopper and quick hopper limit the weight by volume, the weight limit is the volume limit.

[0061] (3) A feeding path for each alloy is formed based on the principle of shortest time, and the feeding path for each alloy is composed of at least one candidate feeding path.

[0062] In the embodiment of the present invention, the method for forming the feeding path of each alloy is specifically as follows:

[0063] (31) arranging all candidate feeding paths of the alloy in order of priority from smallest to smallest;

[0064] (32) Detect whether the maximum alloy weight and maximum alloy volume of the current candidate feeding path are greater than the weight and volume required by the alloy. If the detection result is yes, add the current candidate feeding path to the alloy feeding path set to form the feeding path of the alloy, update the maximum alloy weight and maximum alloy volume of the bin and hopper in the candidate feeding path, update the maximum alloy weight and maximum alloy volume of the relevant candidate feeding paths, and update the weight of the alloy;

[0065] (33) If the detection result is no, the current candidate feeding path is added to the alloy feeding path set, the maximum alloy weight and maximum alloy volume of the silo and hopper in the candidate feeding path are updated, the maximum alloy weight and maximum alloy volume of the relevant candidate feeding paths are updated, the weight of the alloy is updated, the next candidate feeding path is used as the current feeding path, and step (32) is executed.

[0066] In the embodiment of the present invention, if the current candidate feeding path is the last one, the current round (also understood as a batch) of the feeding path planning of the alloy is completed, and the remaining ones are carried out in the next round, and the planning method of the feeding path is the same as that of the current round. The feeding paths of all alloys can be obtained by the above method, and the candidate feeding paths in the same round of all feeding paths perform the feeding operation at the same time. In order to further shorten the feeding time, the candidate feeding path selected in the next round starts weighing after the corresponding candidate feeding path selected in the previous round completes the material handling operation.

[0067] It should be noted that during the entire feeding process, since the fast hopper and direct hopper will not be refilled, the maximum alloy weight will decrease after the previous batch of feeding. However, the material storage capacity in the high-level silo is very large, and the feeding of the previous batch will not affect the feeding of the subsequent batches. Therefore, the maximum alloy weight is unchanged by default, and the maximum alloy weight of the weighing hopper is used.

[0068] Figure 2 The schematic diagram of the structure of the RH alloy operation path generation system provided in the embodiment of the present invention, for the convenience of description, only the part related to the embodiment of the present invention is shown, and the system includes:

[0069] Database, storing data of various silos and hoppers and the relationship between silos and hoppers;

[0070] Input unit, read the alloy, alloy weight and alloy density that need to be added to RH:

[0071] The processing unit is connected with the input unit and the database, and the processing unit obtains the feeding paths of various alloys based on the above-mentioned RH alloy operation path generation method.

[0072] In order to further illustrate the RH alloy operation path generation of the present invention, the present invention is further described below by taking the production of 300TRH refining furnace as an example.

[0073] The paths between the silos and hoppers are connected by database configuration, and the silo status and alloy weight of the silo and hopper are read to establish the topology of the RH alloy layer system and set the priority of each feeding path. The database configuration table structure is as follows:

[0074] Configuration table of high-level silo:

[0075] Serial number Fields 1 High level silo number 2 Alloy product name 3 Priority 4 Locked

[0076] Configuration table of weighing hopper:

[0077] Serial number Fields 1 Weighing hopper number 2 Weight range 3 Volume range 4 Priority 5 Locked

[0078] Configuration table of fast hopper:

[0079] Serial number Fields 1 Fast Hopper Number 2 Alloy product name 3 Hopper alloy weight 4 Priority 5 Locked

[0080] Configuration table of vacuum hopper:

[0081] Serial number Fields 1 Vacuum hopper number 2 Weight range 3 Volume range 4 Priority 5 Locked

[0082] Configuration table of direct hopper:

[0083] Serial number Fields 1 Direct hopper number 2 Alloy product name 3 Hopper alloy weight 4 Priority 5 Locked

[0084] High-level silo ~ weighing hopper association table:

[0085]

[0086]

[0087] Weighing hopper ~ vacuum hopper correlation table:

[0088] Serial number Fields 1 Weighing hopper number 2 Vacuum hopper number

[0089] Rapid hopper ~ vacuum hopper correlation table:

[0090] Serial number Fields 1 Fast Hopper Number 2 Vacuum hopper number

[0091] Based on this data, delete all locked silos and hoppers in the topology map, obtain all possible feeding routes, and set the priority, alloy weight limit and alloy volume limit for each feeding route:

[0092]

[0093] After obtaining the weight of the alloy added, calculate the priority and maximum weighing weight of each feeding path. For each alloy, give priority to the feeding path with the lowest priority. After selecting a feeding path, record the alloy and alloy weight of the feeding path, update the topology map, and reset the priority and maximum weighing weight of the feeding path. Repeat this process, set the maximum weighing weight for all alloys in turn, and obtain the alloys and feeding paths added in this round. For alloys for which no feeding path is found, perform the above operation based on the second round until all alloys have found the feeding path.

[0094] Embodiment 1:

[0095] (1) According to the target composition and incoming composition of the steel grade, RH needs to add alloy type, alloy weight and alloy density:

[0096] Alloy name Weight(kg) Alloy density (kg / m3) Ferrosilicon 14000 1200 Ferromanganese 900 3000 Aluminum Granules 0 800

[0097] (2) The topological diagram of the RH alloy layer system in Example 1 is as follows Figure 3As shown in the figure, BIN represents high-level silo; WB represents weighing hopper, MH represents fast hopper, VH represents vacuum hopper; DF represents direct hopper.

[0098] (3) Candidate dosing paths for all alloys:

[0099] Alloy Type path Single alloy weight Priority Aluminum Granules BIN1~WB1~VH1~Vacuum tank 1200kg 19 Aluminum Granules BIN1~WB1~VH2~Vacuum tank 2000kg 27 Aluminum Granules DF1~Vacuum tank 2000kg 1 Ferrosilicon BIN2~WB1~VH1~Vacuum tank 1800kg 19 Ferrosilicon BIN2~WB1~VH2~Vacuum tank 3000kg 27 Ferrosilicon BIN4~WB2~VH1~Vacuum tank 1800kg 4 Ferrosilicon MH1~VH1~Vacuum tank 400kg 2 Ferrosilicon DF2~Vacuum tank 9000kg 1 Ferromanganese BIN3~WB2~VH1~Vacuum tank 2000kg 3

[0100] (4) The alloy feeding path can be obtained:

[0101]

[0102]

[0103] The alloy batch semicolon indicates the batch number in which the alloy is added. For example, in the table above, alloys 1 to 5 are added first, and alloy 6 is added after that. For ferrosilicon, the candidate feeding paths are selected in order of priority: (1) DF2 ~ vacuum tank, priority 1; (2) MH1 ~ VH1 ~ vacuum tank, priority 2; (3) BIN4 ~ WB2 ~ VH1 ~ vacuum tank, priority 4. The next candidate feeding path should be: BIN2 ~ WB1 ~ VH1 ~ vacuum tank. Since ferromanganese selects the candidate feeding path in the first round: BIN3 ~ WB2 ~ VH1 ~ vacuum tank. B2~VH1~vacuum tank, resulting in the maximum weight and volume of VH1 being limited, so the next candidate feeding path for ferrosilicon is: BIN2~WB1~VH2~vacuum tank. So far, the first round of candidate feeding paths for ferrosilicon have been traversed. Therefore, the remaining ferrosilicon is fed through the second round of planning. Since the maximum weight and volume of the candidate feeding path DF2~vacuum tank and the candidate feeding path MH1~VH1~vacuum tank are limited, and the feeding of ferromanganese has been completed in the first round, the candidate feeding path BIN2~WB1~VH1~vacuum tank will be selected. At this time, the feeding of ferrosilicon has been completed.

[0104] Embodiment 2:

[0105] (1) According to the target composition and incoming composition of the steel grade, RH needs to add alloy type, alloy weight and alloy density:

[0106]

[0107]

[0108] (2) The topological diagram of the RH alloy layer system in Example 2 is as follows Figure 4 As shown in the figure, BIN in the figure represents high-level silo, BIN1~BIN8 represent high-level silo numbers; WB represents weighing hopper, MH represents fast hopper, VH represents vacuum hopper; DF represents direct hopper.

[0109] (3) Candidate dosing paths for all alloys:

[0110] Alloy Type path Single alloy weight Priority Aluminum Granules BIN1~WB1~VH2~Vacuum tank 2000kg 27 Ferrosilicon BIN2~WB1~VH2~Vacuum tank 3000kg 27 Ferromanganese BIN3~WB2~VH2~Vacuum tank 3000kg 15 Ferrosilicon BIN4~WB2~VH2~Vacuum tank 1800kg 16 Ferroniobium BIN5~WB3~VH1~Vacuum tank 2000kg 3 Ferrotitanium BIN6~WB3~VH1~Vacuum tank 2000kg 3 Ferrophosphorus BIN7~WB3~VH1~Vacuum tank 2000kg 3 Scrap Steel BIN8~WB3~VH1~Vacuum tank 2000kg 3 Aluminum Granules MH1~VH1~Vacuum tank 1000kg 2 Toner MH2~VH1~Vacuum tank 500kg 2 Ferroboron MH3~VH1~Vacuum tank 100kg 2

[0111] (4) The alloy feeding path can be obtained:

[0112]

[0113]

[0114] The present invention provides a method for intelligently generating a RH alloy operation path and being generally applicable. The method can be adapted to various on-site conditions and can realize rapid migration between different RH furnace seats by means of database configuration.

[0115] The present invention has been described exemplarily. Obviously, the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A method for generating a RH alloy running path, characterized in that: The method comprises the following steps: (1) Obtain the alloy to be added to RH, the alloy weight and the alloy density; (2) reading the data of each silo and hopper and the correlation between the silos and hoppers, obtaining candidate feeding paths for various alloys, and forming the maximum alloy weight and alloy volume corresponding to the candidate feeding paths; (3) forming a feeding path with a shorter feeding time for each alloy, wherein the feeding path for each alloy consists of at least one candidate feeding path; The priority is used to evaluate the feeding time of each candidate feeding path. The shorter the feeding time, the smaller the priority value assigned; There are three types of candidate feeding paths, as follows: (1) High-level silo ~ weighing hopper ~ vacuum hopper ~ vacuum tank; (2) Quick hopper ~ vacuum hopper ~ vacuum tank; (3) Direct hopper to vacuum tank; The priority value of the candidate feeding path is the sum of the priorities of all silos and hoppers on the candidate feeding path; Among them, the priority value of the high-level silo is greater than that of the fast hopper, and the priority of the fast hopper is greater than that of the direct hopper; The feed path for each alloy was formed as follows: (31) arranging all candidate feeding paths of the alloy in ascending order of priority; (32) detecting whether the maximum alloy weight and the maximum alloy volume of the current candidate feeding path are greater than the weight and volume required by the alloy; if the detection result is yes, adding the current candidate feeding path to the alloy feeding path set to form the feeding path of the alloy, updating the maximum alloy weight and the maximum alloy volume of the relevant candidate feeding path, and updating the weight of the alloy; (33) If the detection result is no, the current candidate feeding path is added to the alloy feeding path set, the maximum alloy weight and maximum alloy volume of the relevant candidate feeding path are updated, the weight of the alloy is updated, the next candidate feeding path is used as the current feeding path, and step (32) is executed.

2. The method for generating the RH alloy running path according to claim 1, characterized in that: The candidate feeding paths for various alloys were generated as follows: From the topological diagram of the RH alloy material layer system, high-level silos, fast hoppers and direct hoppers with the same alloy name as the current alloy are obtained. Based on the association between the silos and hoppers, all paths from the above high-level silos, fast hoppers and direct hoppers to the vacuum tank are obtained, which are the candidate feeding paths for the corresponding alloys.

3. The method for generating the RH alloy running path according to claim 2, characterized in that: When a silo or hopper is blocked, the candidate feeding paths associated with the silo or hopper are deleted.

4. The method for generating the RH alloy running path according to claim 1, characterized in that: The candidate feeding paths in the same round among all the feeding paths perform the feeding operation at the same time, and the candidate feeding paths selected in the next round start weighing after the corresponding candidate feeding paths selected in the previous round complete the material handling operation.

5. A method system for generating a RH alloy running path, characterized in that: The system comprises: Database, storing data of various silos and hoppers and the relationship between silos and hoppers; Input unit, input the alloy to be added to RH, alloy weight and alloy density: The processing unit is connected to the input unit and the database, and the processing unit obtains the feeding paths of various alloys based on the RH alloy operation path generation method described in any one of claims 1 to 4.

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