An intelligent simulation method for scrap steel logistics in electric furnace steelmaking projects

Abstract

The present invention discloses a smart simulation method for scrap logistics of an electric furnace steelmaking project, and belongs to the technical fields of electric furnace steelmaking, logistics simulation and intelligent manufacturing. The steps of the present invention are: S1: constructing electric furnace steelmaking workshop components according to the technical scheme of the electric furnace steelmaking project; S2: constructing main equipment according to the technical scheme of the electric furnace steelmaking project; S3: constructing a process flow according to the technical scheme of the electric furnace steelmaking project; S4: establishing models for the electric furnace cross-electric furnace smelting process, the charging cross-over crane lifting basket process, the scrap steel cross-over basket transportation process, the scrap steel cross-over crane charging process, the scrap steel cross-over crane replenishment process, and the scrap steel vehicle transportation process; S5: coupling the above steps to form a smart simulation method for scrap logistics of the electric furnace steelmaking project, simulating the entire process of scrap logistics, and obtaining the scrap logistics plan, scrap logistics capacity and theoretical production capacity of the electric furnace steelmaking project. This method can improve the intelligent level of scrap logistics of the electric furnace steelmaking project, and help promote the intelligent manufacturing and transformation and upgrading of my country's steel industry.

Description

Technical Field

[0001] The present invention relates to the fields of electric furnace steelmaking, logistics simulation and intelligent manufacturing technology, and more specifically, to an intelligent simulation method for scrap steel logistics in an electric furnace steelmaking project. Background Art

[0002] Carbon emissions from my country's steel industry account for about 15% of the country's total carbon emissions, making it the manufacturing industry with the highest carbon emissions in my country. Green and low-carbon development has become the core proposition of the transformation and development of my country's steel industry, and is the only way for China's steel industry to achieve high-quality development. The carbon emissions per ton of steel in my country's steel industry are about 1.7 to 1.8 tons per ton of crude steel. According to the 1.065 billion tons of steel output in 2020, the total carbon emissions exceed 1.8 billion tons. From the perspective of the process flow, the carbon emissions of the blast furnace-converter process are about 1.8 to 2.2 tons per ton of crude steel, and the carbon emissions of the electric furnace process are about 0.4 to 0.8 tons per ton of crude steel. The process flow of my country's steel industry is mainly based on the blast furnace-converter process with high carbon emissions, accounting for about 90%, and the electric furnace process with low emissions accounts for only 10%. The National Development and Reform Commission issued the "Opinions on the Record Management of Iron and Steel Smelting Projects" (Development and Reform Industry

[2021] No. 594), pointing out that it is vigorously encouraging the development of electric furnace steel and gradually guiding steel enterprises, especially some urban steel mills, to gradually turn to short process technology.

[0003] Against the backdrop of carbon peak and carbon neutrality, electric furnace steelmaking has good development prospects, and many electric furnace steelmaking projects in my country are being prepared and constructed. However, with the development of electric furnace steelmaking technology, the electric furnace steelmaking process, represented by the quantum electric furnace, has high requirements for scrap steel logistics capabilities due to its large nominal capacity, short smelting cycle, and large scrap steel consumption and replenishment. At present, the scrap steel logistics of electric furnace steelmaking projects are mainly based on manual experience and lack theoretical support. Therefore, it is necessary to develop an intelligent simulation method for scrap steel logistics in electric furnace steelmaking projects, simulate and demonstrate the scrap steel logistics capabilities, and reduce the investment cost and technical risks of electric furnace steelmaking projects. Summary of the invention

[0004] In view of the defects and shortcomings of the prior art, the present invention provides an intelligent simulation method for scrap steel logistics in an electric furnace steelmaking project.

[0005] In order to achieve the above object, the technical solution provided by the present invention is:

[0006] The intelligent simulation method for scrap steel logistics of an electric furnace steelmaking project of the present invention comprises the following steps:

[0007] S1: Construct the components of the electric furnace steelmaking workshop according to the technical plan of the electric furnace steelmaking project: including the electric furnace span, charging span, and scrap steel span;

[0008] S2: Construct the main equipment according to the technical plan of the electric furnace steelmaking project, including but not limited to: electric furnace, overhead crane, material basket, material basket transport vehicle, and scrap steel transport vehicle;

[0009] S3: Construct the process flow according to the technical plan of the electric furnace steelmaking project;

[0010] S4: Models are established for the smelting process across electric furnaces, the process of lifting the material basket across the overhead crane for charging, the process of transporting scrap steel across the material basket, the process of charging scrap steel across the overhead crane, the process of replenishing scrap steel across the overhead crane, and the process of transporting scrap steel by vehicle.

[0011] S5: Coupling the above steps, an intelligent simulation method for scrap steel logistics of the electric furnace steelmaking project is formed, and the entire process of scrap steel logistics is simulated to obtain the scrap steel logistics plan, scrap steel logistics capacity and theoretical production capacity of the electric furnace steelmaking project.

[0012] Furthermore, the step S4 is specifically as follows:

[0013] S41: For the cross-furnace smelting process of electric furnace, an electric furnace smelting model is established to determine the scrap steel supply rhythm according to the electric furnace smelting cycle and the steel output of the electric furnace;

[0014] S42: for the process of lifting the material basket by the charging crane, a charging model is established, and the operation mode of the charging crane is determined according to the scrap steel supply rhythm;

[0015] S43: establishing a scrap steel cross-basket transportation model for the scrap steel cross-basket transportation process, and determining an operation mode of a scrap steel cross-basket transportation vehicle according to the scrap steel supply rhythm;

[0016] S44: for the scrap steel cross crane charging process, a scrap steel cross crane charging model is established to determine the scrap steel cross crane charging operation mode;

[0017] S45: for the scrap steel cross crane refueling process, a scrap steel cross crane refueling model is established to determine the scrap steel cross crane refueling operation mode;

[0018] S46: forming a scrap steel overhead crane operation mode according to the scrap steel overhead crane charging operation mode and the scrap steel overhead crane replenishing operation mode;

[0019] S47: For the scrap steel vehicle transportation process, a scrap steel vehicle transportation model is established, and according to the scrap steel overhead crane operation mode, the scrap steel vehicle dispatch strategy and route are determined through the scrap steel vehicle intelligent calling and intelligent transportation mode.

[0020] Furthermore, the process flow in S3 includes:

[0021] S31) In the scrap steel span, the overhead crane adds scrap steel into the empty basket. When the rated loading volume is reached, the basket transport vehicle transports the basket filled with scrap steel to the loading span via the track;

[0022] S32) In the charging span, the overhead crane lifts the basket filled with scrap steel to the top of the scrap steel trough near the charging port of the electric furnace, adds the scrap steel in the basket to the scrap steel trough, and then lifts the empty basket back to the top of the basket transport vehicle;

[0023] S33) In the electric furnace span, the scrap steel trough filled with scrap steel is transported to the electric furnace charging port through the lifting track, and the scrap steel in the scrap steel trough is added to the electric furnace for smelting, and at the same time, the empty scrap steel trough is transported back to the charging span through the lifting track, waiting for the next time to load scrap steel from the material basket and add scrap steel to the electric furnace;

[0024] S34) in the scrap steel span, transporting the empty basket back to the scrap steel span by a basket transport vehicle;

[0025] S35) In the scrap steel bay, the consumed scrap steel is replenished by using an overhead crane to transport the scrap steel from the scrap steel transport vehicle;

[0026] S36) Repeat the above steps to circulate and complete the supply of scrap steel required for electric furnace smelting.

[0027] Furthermore, the electric furnace smelting model, charging span charging model, scrap steel cross transportation model, scrap steel cross charging model, scrap steel cross replenishment model, and scrap steel vehicle transportation model are digitally modeled according to the technical plan of the electric furnace steelmaking project, in accordance with the actual physical space and actual process flow.

[0028] Furthermore, the electric furnace smelting model obtains the scrap steel supply rhythm according to the designed capacity of the electric furnace steelmaking project, combined with the average steel output, smelting cycle and smelting mode of the electric furnace.

[0029] Furthermore, the charging span charging model obtains the number of charging span cranes and the crane operation mode according to the scrap steel supply rhythm, combined with the crane operation rate and the maintenance schedule.

[0030] Furthermore, the scrap steel cross-transportation model is based on autonomous decision-making. After the basket is transported to a designated location by an unmanned basket transport vehicle, the basket is lifted or the scrap steel is added.

[0031] Furthermore, the scrap steel cross-feeding model and the scrap steel cross-replenishment model process the scrap steel across physical space in a three-dimensional grid, and generate a digital model based on the real physical world and multi-dimensional data mapping through multi-dimensional modeling technology, stereo synthesis technology and multi-dimensional interaction technology.

[0032] Furthermore, the scrap steel cross-loading model and / or the scrap steel cross-replenishing model digitizes the scrap steel cross-over crane loading process and / or the scrap steel cross-replenishing process according to the digital model and in combination with the overhead crane operation parameters.

[0033] Furthermore, the scrap steel vehicle transportation model intelligently generates a departure decision and automatically selects a travel route and a refueling location according to the refueling instructions issued by the scrap steel cross.

[0034] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0035] The present invention can use the intelligent simulation method of scrap steel logistics of electric furnace steelmaking projects, decompose and couple the process flow, establish a digital model, simulate the actual situation of scrap steel logistics of electric furnace steelmaking projects, obtain the best scrap steel logistics plan, scrap steel logistics capacity and theoretical production capacity of electric furnace steelmaking projects and other key information, simulate and demonstrate the scrap steel logistics capacity of electric furnace steelmaking projects, solve the key problems of design, construction and operation of electric furnace steelmaking projects, and significantly reduce the investment cost and risk of electric furnace steelmaking project construction. This project can further realize the intelligent scheduling of scrap steel logistics through intelligent simulation methods, promote the transformation and upgrading of intelligent manufacturing in my country's steel industry, and promote intelligent development; it can also promote the development of my country's electric furnace steelmaking technology, promote carbon emission reduction in my country's steel industry, and promote green development by solving the key problem of scrap steel logistics. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a flowchart of the present invention;

[0037] Figure 2 It is a schematic diagram of the simulation of scrap steel logistics in the electric furnace steelmaking project of the present invention.

[0038] In the figure: 1. Electric furnace span; 2. Electric furnace; 3. Charging span; 4. 1# scrap steel span; 5. 2# scrap steel span; 6. 3# scrap steel span; 7. 4# scrap steel span; 8. Overhead crane; 9. Material basket trolley; 10. Scrap steel transport vehicle. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0040] Example 1

[0041] The present embodiment provides an intelligent simulation method for scrap steel logistics of an electric furnace steelmaking project, including an electric furnace smelting model, a cross-feeding model, a scrap steel cross-transportation model, a scrap steel cross-feeding model, a scrap steel cross-replenishment model, and a scrap steel vehicle transportation model, and the steps are as follows:

[0042] Step 1: According to the technical plan of the electric furnace steelmaking project, Figure 2As shown, the electric furnace steelmaking workshop is mainly divided into the electric furnace span, charging span and scrap steel span;

[0043] Step 2: According to the technical plan of the electric furnace steelmaking project, Figure 2 As shown, the electric furnace steelmaking equipment is mainly divided into an electric furnace, an overhead crane, a material basket, a material basket transport vehicle, and a scrap steel transport vehicle, wherein the electric furnace is a quantum electric furnace, the overhead crane is a metallurgical crane, the material basket is a round or square material basket, the material basket transport vehicle is a rail train pulled by an automatic locomotive, and the scrap steel transport vehicle is a car or truck with a self-unloading function;

[0044] Step 3: According to the technical plan of the electric furnace steelmaking project, Figure 2 As shown in the figure, the steelmaking process of the electric furnace is mainly divided into: 1) In the scrap steel span, the overhead crane adds the scrap steel into the empty basket. After the rated loading volume is reached, the basket transport vehicle transports the basket full of scrap steel to the charging span via the track; 2) In the charging span, the overhead crane lifts the basket full of scrap steel to the top of the scrap steel trough near the charging port of the electric furnace, adds the scrap steel in the basket to the scrap steel trough, and then lifts the empty basket back to the top of the basket transport vehicle; 3) In the electric furnace span, the scrap steel trough full of scrap steel is transported to the electric furnace via the lifting track At the charging port, the scrap steel in the scrap steel trough is added to the electric furnace for smelting, and at the same time, the empty scrap steel trough is transported back to the charging span through the lifting track, waiting for the next time to load scrap steel from the basket and add scrap steel to the electric furnace; 4) In the scrap steel span, the empty basket described in step 3 is transported back to the scrap steel span by the basket transport vehicle; 5) In the scrap steel span, the scrap steel consumed in step 1 is supplemented by the scrap steel transport vehicle through the overhead crane; 6) The above steps are repeated in a cycle to complete the scrap steel supply required for electric furnace smelting;

[0045] Step 4: According to the electric furnace steelmaking workshop described in step 1, the electric furnace steelmaking equipment described in step 2, and the electric furnace steelmaking process described in step 3, for an electric furnace smelting cycle, two charging cranes lifting four baskets, four scrap steels across eight cranes charging, four scrap steels across eight cranes replenishing, four basket trolleys transporting, and several scrap steel vehicles transporting processes, models are established for the electric furnace across electric furnace smelting process, charging crane lifting basket process, scrap steel across basket transportation process, scrap steel across crane charging process, scrap steel across crane replenishing process, and scrap steel vehicle transportation process related to scrap steel logistics, and the process flow of scrap steel logistics is decomposed;

[0046] Step 5: According to the cross-furnace smelting process of the electric furnace, the electric furnace smelting model is established. Combined with the electric furnace smelting cycle and the steel output of the electric furnace, the amount of scrap steel required for electric furnace smelting is determined, and then the required single basket scrap steel loading amount and the number of baskets are determined. Among them, the smelting cycle of the quantum electric furnace is 30-40min, the steel output is 150t / furnace, and the amount of scrap steel required for electric furnace smelting is 162t / furnace. Scrap steel needs to be added four times in one smelting cycle, the number of baskets is 4, and the scrap steel loading amount of a single basket is 40t, 40t, 40t, and 42t respectively;

[0047] Step 6: According to the process of lifting the material basket by the overhead crane, a feeding model is established. Combined with the scrap steel supply rhythm described in step 5, the feeding cross-over crane operation mode is determined on the basis of satisfying the overhead crane operation rate, wherein the overhead crane operation rate is controlled to be lower than 70%, and the overhead crane lifts the material basket once within 6 to 10 minutes;

[0048] Step 7: According to the scrap steel cross-basket transportation process, a scrap steel cross-transportation model is established, and according to the scrap steel supply rhythm described in step 5, the scrap steel cross-basket transportation vehicle operation mode is determined, wherein the transportation speed of the basket transportation vehicle is 30 to 90 m / min, and one basket transportation vehicle can transport 1 to 3 baskets each time;

[0049] Step 8: According to the scrap steel cross-over crane charging process, a scrap steel cross-over crane charging model is established, and the scrap steel cross-over crane charging operation mode is determined on the basis of meeting the overhead crane operation rate; wherein, the overhead crane operation rate is lower than 70%, the overhead crane trolley running speed can reach 120m / min, the trolley running speed can reach 40m / min, the hoist lifting speed can reach 16m / min, and the time for the overhead crane to fill a basket is 10 to 30min;

[0050] Step 9: For the scrap steel cross-over crane refueling process, a scrap steel cross-over crane refueling model is established, and the scrap steel cross-over crane refueling operation mode is determined on the basis of meeting the overhead crane operation rate; wherein, the overhead crane operation rate is lower than 70%, the overhead crane trolley running speed can reach 120m / min, the trolley running speed can reach 40m / min, the hoist lifting speed can reach 16m / min, and the overhead crane refuels on the basis of meeting the overhead crane operation rate;

[0051] Step 10: According to the scrap steel overhead crane charging operation mode and the scrap steel overhead crane replenishing operation mode described in step 8 and step 9, coupling is performed to form a scrap steel overhead crane operation mode;

[0052] Step 11: For the scrap steel vehicle transportation process, a scrap steel vehicle transportation model is established. According to the scrap steel overhead crane operation mode described in step 10, the scrap steel vehicle dispatch strategy and route are determined through the scrap steel vehicle intelligent call and intelligent transportation mode; wherein, the scrap steel transportation vehicle is rated to carry 30 tons, and the number of scrap steel transportation vehicles is 200 to 300 per day;

[0053] Step 12: Couple the above steps to form an intelligent simulation method for scrap steel logistics of the electric furnace steelmaking project, simulate the entire process of scrap steel logistics, and obtain key information such as the scrap steel logistics plan, scrap steel logistics capacity and theoretical production capacity of the electric furnace steelmaking project; among which, the theoretical production capacity is 1.8 to 2 million tons / year.

[0054] According to the technical scheme of the electric furnace steelmaking project, the present invention forms an intelligent simulation method for scrap logistics of the electric furnace steelmaking project based on process automation, model digitization, and intelligent decision-making through the decomposition and coupling of the electric furnace smelting model, the charging cross-charging model, the scrap steel cross-transportation model, the scrap steel cross-charging model, the scrap steel cross-replenishment model, and the scrap steel vehicle transportation model. The method simulates the scrap logistics of the electric furnace steelmaking project, and simulates and demonstrates the scrap logistics capacity of the electric furnace steelmaking project, which significantly reduces the investment cost and technical risk of the electric furnace steelmaking project and solves the key issues of the design, construction, and operation of the electric furnace steelmaking project. This method can improve the intelligent level of scrap logistics of the electric furnace steelmaking project and promote the green, low-carbon, and high-quality development of my country's steel industry.

[0055] The above is a schematic description of the present invention and its implementation methods, which is not restrictive. The drawings show only one implementation method of the present invention, which is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an implementation method similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A smart simulation method for scrap steel logistics in an electric furnace steelmaking project, characterized in that: The method comprises the following steps: S1: Construct the components of the electric furnace steelmaking workshop according to the technical plan of the electric furnace steelmaking project: including the electric furnace span, charging span, and scrap steel span; S2: Construct the main equipment according to the technical plan of the electric furnace steelmaking project, including but not limited to: electric furnace, overhead crane, material basket, material basket transport vehicle, and scrap steel transport vehicle; S3: Construct the whole process of electric furnace steelmaking according to the technical plan of electric furnace steelmaking project; S4: Models are established for the smelting process across electric furnaces, the process of lifting the material basket across the overhead crane for charging, the process of transporting scrap steel across the material basket, the process of charging scrap steel across the overhead crane, the process of replenishing scrap steel across the overhead crane, and the process of transporting scrap steel by vehicle. S5: Coupling the above steps, a smart simulation method for scrap steel logistics of the electric furnace steelmaking project is formed, and the entire process of scrap steel logistics is simulated to obtain the scrap steel logistics plan, scrap steel logistics capacity and theoretical production capacity of the electric furnace steelmaking project; The process flow in S3 includes: S31) In the scrap steel span, the overhead crane adds scrap steel into the empty basket. When the rated loading volume is reached, the basket transport vehicle transports the basket filled with scrap steel to the loading span via the track; S32) In the charging span, the overhead crane lifts the basket filled with scrap steel to the top of the scrap steel trough near the charging port of the electric furnace, adds the scrap steel in the basket to the scrap steel trough, and then lifts the empty basket back to the top of the basket transport vehicle; S33) In the electric furnace span, the scrap steel trough filled with scrap steel is transported to the electric furnace charging port through the lifting track, and the scrap steel in the scrap steel trough is added to the electric furnace for smelting, and at the same time, the empty scrap steel trough is transported back to the charging span through the lifting track, waiting for the next time to load scrap steel from the material basket and add scrap steel to the electric furnace; S34) in the scrap steel span, transporting the empty basket back to the scrap steel span by a basket transport vehicle; S35) In the scrap steel bay, the consumed scrap steel is replenished by using an overhead crane to transport the scrap steel from the scrap steel transport vehicle; S36) Repeat the above steps to circulate and complete the supply of scrap steel required for electric furnace smelting.

2. The intelligent simulation method for scrap steel logistics of an electric furnace steelmaking project as claimed in claim 1, characterized in that: The step S4 is specifically as follows: S41: For the cross-furnace smelting process of electric furnace, an electric furnace smelting model is established to determine the scrap steel supply rhythm according to the electric furnace smelting cycle and the steel output of the electric furnace; S42: for the process of lifting the material basket by the charging crane, a charging model is established, and the operation mode of the charging crane is determined according to the scrap steel supply rhythm; S43: establishing a scrap steel cross-basket transportation model for the scrap steel cross-basket transportation process, and determining an operation mode of a scrap steel cross-basket transportation vehicle according to the scrap steel supply rhythm; S44: for the scrap steel cross crane charging process, a scrap steel cross crane charging model is established to determine the scrap steel cross crane charging operation mode; S45: for the scrap steel cross crane refueling process, a scrap steel cross crane refueling model is established to determine the scrap steel cross crane refueling operation mode; S46: forming a scrap steel overhead crane operation mode according to the scrap steel overhead crane charging operation mode and the scrap steel overhead crane replenishing operation mode; S47: For the scrap steel vehicle transportation process, a scrap steel vehicle transportation model is established, and according to the scrap steel overhead crane operation mode, the scrap steel vehicle dispatch strategy and route are determined through the scrap steel vehicle intelligent calling and intelligent transportation mode.

3. The intelligent simulation method for scrap steel logistics of an electric furnace steelmaking project according to claim 2 is characterized in that: The electric furnace smelting model, charging span charging model, scrap steel cross transportation model, scrap steel cross charging model, scrap steel cross replenishment model, and scrap steel vehicle transportation model are digitally modeled according to the technical plan of the electric furnace steelmaking project, in accordance with the actual physical space and actual process flow.

4. The intelligent simulation method for scrap steel logistics of an electric furnace steelmaking project according to claim 3 is characterized by: The electric furnace smelting model obtains the scrap steel supply rhythm according to the designed capacity of the electric furnace steelmaking project, combined with the average steel output, smelting cycle and smelting mode of the electric furnace.

5. The intelligent simulation method for scrap steel logistics of an electric furnace steelmaking project according to claim 1 is characterized by: The charging span charging model obtains the number of charging span cranes and the crane operation mode according to the scrap steel supply rhythm, combined with the crane operation rate and the maintenance schedule.

6. The intelligent simulation method for scrap steel logistics of an electric furnace steelmaking project according to claim 1 is characterized by: The scrap steel cross-transportation model is based on autonomous decision-making. After the basket is transported to a designated location by an unmanned basket transport vehicle, the basket is lifted or the scrap steel is added.

7. The intelligent simulation method for scrap steel logistics of an electric furnace steelmaking project according to claim 1 is characterized by: The scrap steel cross-feeding model and the scrap steel cross-replenishment model process the scrap steel across physical space in three-dimensional grids, and generate a digital model based on the real physical world and multi-dimensional data mapping through multi-dimensional modeling technology, stereo synthesis technology and multi-dimensional interaction technology.

8. The intelligent simulation method for scrap steel logistics of an electric furnace steelmaking project according to claim 7 is characterized by: The scrap steel cross-loading model and / or scrap steel cross-replenishing model digitizes the scrap steel cross-over crane loading process and / or scrap steel cross-replenishing process according to the digital model and in combination with the overhead crane operation parameters.

9. The intelligent simulation method for scrap steel logistics of an electric furnace steelmaking project according to claim 1 is characterized by: The scrap steel vehicle transportation model intelligently generates a departure decision and automatically selects a travel route and a refueling location according to the refueling instruction issued by the scrap steel cross.

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