A port-based blended ore production and distribution method and system

Abstract

The application provides a port-based mixed ore production and distribution method and system, which comprises the following steps: firstly, acquiring a transportation granularity range value of finished mixed ore with a transportation segregation degree within a preset segregation degree range; then, acquiring various simulated iron ore raw materials corresponding to the finished mixed ore; screening each simulated iron ore raw material before entering a port premixing tank, so that each simulated iron ore raw material has a raw material particle size within the transportation granularity range value, and various premixed iron ore raw materials are obtained; batching the various premixed iron ore raw materials to form port mixed ore; and transporting the port mixed ore to a target steel enterprise by a transportation device. The port-based mixed ore production and distribution method provided by the application controls the granularity of each raw material of the mixed ore produced by the port within a reasonable range, so that the composition segregation of the produced mixed ore product is greatly improved after long-distance transportation, and the quality of the product mixed ore is improved.

Description

Technical Field

[0001] This invention relates to the field of sintering technology, and in particular to a port-based method and system for the production and distribution of blended ore. Background Technology

[0002] In the field of iron and steel sintering technology, the stability of the chemical composition (mainly various iron ores or other iron-containing raw materials) of the iron-containing raw materials entering the sintering process is crucial for stable and smooth sintering production, cost reduction, and efficiency improvement. In actual production, to ensure the stability of the chemical composition of iron ore in the sintering process, enterprises establish their own blending yards. These yards uniformly mix iron-containing raw materials from different origins to produce a chemically stable blended ore, which serves as the iron-containing raw material (blended ore) for sintering production.

[0003] In existing iron-containing raw material production, the sintering and mixing yard generally adopts a two-stage mixing process. Steel companies need to set up a primary yard and a secondary yard. The mixing process is as follows: (1) All iron-containing raw materials entering the plant are piled up in the primary yard; (2) All iron-containing raw materials are transported to the pre-mixing tank by a small belt for later use; (3) The stacker / reclaimer stacks the various iron-containing raw materials from the pre-mixing tank layer by layer in the secondary yard to a set height; (4) The stacker / reclaimer transports the stacked and mixed mixture to the sintering process by interception. The storage of materials in the secondary yard generally meets the production needs of steel companies for 6 to 7 days. The yard occupies a large area (the primary yard of a certain plant occupies 500m×250m, and the secondary yard occupies 500m×100m). Steel companies that adopt the two-stage mixing process themselves have high investment and complex equipment. In steel production, the operating rates of sintering and blast furnaces are both above 0.9, while the operating rates of primary and secondary material yards are generally around 0.7, and the capacity of equipment in primary and secondary material yards is not fully utilized.

[0004] Furthermore, the steel companies themselves adopt the secondary mixing process, which has the following disadvantages: (1) The secondary material yard has a stockpile of more than ten meters high. Due to open-air operation, material collapse often occurs during the rainy season. Moreover, the mixing stockpile machine and the mixing reclaimer are large-scale material yard equipment, with high daily maintenance and overhaul costs, harsh environment, and great difficulty in maintenance; (2) In the process of flat cutting, the secondary material yard has a mixing stockpile of nearly 100,000 tons, and the production cycle is as long as seven or eight days; (3) The production cycle is long, the traceability of the chemical composition of the mixture is poor, and the silicon-isolating operation within the cycle is difficult.

[0005] In the existing technology, the impact of transportation on the segregation of port blended ore during the process of transporting it from the port blending yard to the target steel enterprise has not been studied. This results in a decrease in the quality of the fully blended port blended ore after it is transported to the target steel enterprise due to transportation segregation. Summary of the Invention

[0006] The port-based blending ore production and distribution method provided by this invention solves the technical problem that existing methods do not consider the impact of transportation on segregation, resulting in poor blending degree and reduced blending quality of the blended ore after it has been fully blended at the supply port and has arrived at the target steel enterprise.

[0007] The first aspect of this invention provides a port-based method for producing and distributing blended ore, comprising: obtaining a preset transport particle size range; obtaining various simulated iron ore raw materials corresponding to the finished blended ore; screening each simulated iron ore raw material before it enters the port premixing tank so that the particle size of each simulated iron ore raw material is within the transport particle size range, thereby obtaining various premixed iron ore raw materials; batching the various premixed iron ore raw materials to form a port blended material; and transporting the port blended material to the target steel enterprise via a transport device.

[0008] In one implementation, the port-based method for producing and distributing blended ore further includes: "obtaining a preset transport particle size range value" specifically includes: obtaining the transport particle size range value of the finished blended ore with a transport segregation degree within a preset segregation degree range as the preset transport particle size range value.

[0009] In one implementation, the port-based blended ore production and distribution method further includes the step of "obtaining the transport particle size range value of the finished blended ore with a transport segregation degree within a preset segregation degree range." Specifically, this includes: establishing a transport segregation model of the particle size distribution of the finished blended ore using machine learning methods, taking various finished blended ores with different historical particle size range values, historical transport methods, and historical transport mileage corresponding to historical transport methods as input parameters, and historical transport segregation degree as the output parameter; obtaining the target demand address of the target steel enterprise and the port supply address, and determining the simulated supply route; and obtaining the transport particle size range value of the finished blended ore with a transport segregation degree within a preset segregation degree range based on the simulated supply route and the particle size distribution transport segregation model, which is the preset transport particle size range value.

[0010] In one implementation, the port-based method for producing and distributing blended ore further includes: a particle size distribution transport segregation model including a particle size distribution water transport segregation model, a particle size distribution rail transport segregation model, and a particle size distribution road transport segregation model; and simulated supply routes including water transport supply routes and the corresponding water transport mileage, rail transport supply routes and the corresponding rail transport mileage, and road transport supply routes and the corresponding road transport mileage.

[0011] In one implementation, the port-based method for producing and distributing blended ore further includes: using historical data to obtain the particle size range of simulated blended material with a transport segregation degree within a preset segregation degree range as a preset transport particle size range value.

[0012] In one implementation, the port-based method for producing and distributing blended ore also includes: a preset transport particle size range of 3-10 mm.

[0013] In one implementation, the port-based method for producing and distributing blended ore further includes: screening each type of simulated iron ore raw material before it enters the port premixing tank; removing iron ore particles larger than 10 mm from each type of simulated iron ore raw material to obtain iron ore raw material to be screened; and removing iron ore particles smaller than 3 mm from each type of iron ore raw material to be screened to obtain premixed iron ore raw material.

[0014] In one implementation, the port-based method for producing and distributing blended ore further includes: predicting the transportation environment within the transportation timeframe; if the transportation environment is poor, reducing and updating the preset transportation particle size range value.

[0015] The second aspect of this invention provides a port-based blended ore production and distribution system, comprising: an ore particle size range acquisition module for acquiring the transport particle size range of finished blended ore with a transport segregation degree within a preset range; an iron ore raw material analysis module for acquiring various simulated iron ore raw materials corresponding to the finished blended ore; a raw material screening device for screening each simulated iron ore raw material before it enters the port premixing tank, ensuring that the particle size of each simulated iron ore raw material is within the transport particle size range, thereby obtaining various premixed iron ore raw materials; a metering and blending device for batching various premixed iron ore raw materials to form port blended material; and a transport device for transporting the port blended material to the target steel enterprise.

[0016] Beneficial effects: The present invention provides a port-based method for producing and distributing blended ore. This method sets the blending process at the port, obtaining the transport particle size range of the finished blended ore with a transport segregation degree within a preset range; acquiring various simulated iron ore raw materials corresponding to the finished blended ore; simultaneously screening each simulated iron ore raw material before it enters the port premixing tank to ensure that the particle size of each simulated iron ore raw material is within the transport particle size range, thus obtaining various premixed iron ore raw materials; batching these premixed iron ore raw materials to form port blended material; and then transporting the port blended material to the target steel enterprise via a transport device. Compared to traditional blending ore production methods, the port-based method for producing and distributing blended ore provides a significant improvement in the quality of the finished blended ore after long-distance transportation by controlling the particle size of each raw ore type in the port-produced blended ore within a reasonable range. This also avoids the need for each steel enterprise to establish its own dedicated blending yard (primary and secondary yards), thereby avoiding large-scale ore storage, reducing capital occupation, and minimizing yard space usage. Attached Figure Description

[0017] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a blending ore production process provided in an embodiment of the present invention; Figure 2 A schematic diagram of the particle size distribution of the blended ore after mixing at the port. Figure 3 for Figure 2 A schematic diagram of the particle size distribution of blended ore after it has been transported from the port to the steel plant. Figure 4 A schematic diagram of a port-based method for producing and distributing blended ore, provided as an embodiment of the present invention; Figure 5 A schematic diagram of a port-based method for producing and distributing blended ore, provided as another embodiment of the present invention; Figure 6 A schematic diagram of a material supply method for a port mixing yard, provided for another embodiment of the present invention; Figure 7 This is a schematic diagram of a blended ore production and distribution system provided in an embodiment of the present invention. Detailed Implementation

[0019] To more clearly illustrate the blending ore production process provided in the embodiments of the present invention, the blending ore production process of the port blending yard will be explained first.

[0020] like Figure 1 As shown, the production process of blended ore is as follows: (1) After the raw materials are transported by ocean to the port, they can be piled up at the port terminal on the one hand, and on the other hand, the raw materials can be directly allocated to the corresponding iron ore raw material batching tank.

[0021] (2) The reclaimer transports various types of raw materials from the port terminal to the corresponding batching tanks via conveyors. The raw materials for blending ore production are various types of iron ore, such as... Figure 1 As shown, there are multiple (e.g., 13) batching tanks, which means that a maximum of multiple (e.g., 13) different iron ores can be mixed.

[0022] (3) Multiple disc feeders respectively transport the corresponding raw materials in the batching tank to the metering system. During the conveying process, the multiple disc feeders simultaneously measure the amount of material being conveyed.

[0023] (4) The metering system sends the prepared raw materials to the mixing device (such as a vertical high-intensity mixer or a traditional mixer). The vertical high-intensity mixer achieves deep mixing of the raw materials by means of a high-speed rotating agitator.

[0024] (5) The well-mixed materials are transported to the port for storage or to the target user.

[0025] like Figure 1 As shown, the chemical composition and price of the various raw materials in each batching tank are known quantities. The iron content (TFe) of the blended ore from the vertical high-intensity mixer can be calculated using the following formula: Where: TFeN is the percentage of iron content in the iron ore of the Nth batching tank, and N is a positive integer less than or equal to the total number of batching tanks; GN is the batching flow rate of the iron ore in the Nth batching tank, in t / min; G is the total batching flow rate of all batching tanks, in t / min.

[0026] The SiO2 content TSi of the homogenized ore from the vertical high-intensity mixer can be calculated using the following formula: Where: TSiN is the percentage of SiO2 content in the iron ore of the Nth batching tank, and N is a positive integer less than or equal to the total number of batching tanks; GN is the batching flow rate of the iron ore in the Nth batching tank; unit: t / min; G: total batching flow rate of all batching tanks, unit: t / min The cost P of the homogenized ore from the vertical high-intensity mixer can be calculated using the following formula: Where: P is the unit production cost of blended ore (unit supply price), unit: yuan / t; K is a coefficient, which takes into account factors such as power consumption and mechanical depreciation in the production cost. For example, K can be taken as 1.05 to 1.1; PN: the unit price of iron ore in the Nth batching tank, unit: yuan / t; GN is the flow rate of iron ore participating in the blending of the Nth batching tank, unit: t / min; G is the total flow rate of blending of all batching tanks, unit: t / min.

[0027] It should be noted that steel mills have a large demand for blended ore and require stable chemical composition. During production, the formula for a specific blended ore for a particular plant will remain constant. Port blending yards can generate production formulas for different qualities and prices in real time based on the port's existing iron ore sources and reserves. The production formulas are shown in Table 1. Table 1: Production Formula Table for Port Mixing Yard like Figure 1 As shown, various minerals are mixed to produce blended ore. Blended ore production is a physical mixing process. The most important control parameter in the blended ore production process is to maintain a stable flow ratio of each mineral during production.

[0028] As shown in Table 1, the chemical composition of the minerals involved in the blending production and the proportion of each chemical component are known, so the production formula can be generated in advance. Different production formulas result in different blending quality and costs. Based on the historical production data of the blending yard (the operating parameters of the batching tank and high-intensity mixer of the port blending yard) or the demand for blending ore from each plant, the production formula can be derived from the blending production model constructed according to Formulas 1 to 3. Each port blending yard generates a production formula based on the existing raw material storage conditions. That is, the existing production formula of each port blending yard is the executable production formula of each port blending yard.

[0029] Please refer to Figure 2 and Figure 3 Research revealed that the biggest difference between producing blended ore at a dock and producing it at a steel mill is that dock production is located at a distant point, requiring the product to be transported to the steel plant. Blended ore is composed of raw materials of various origins and qualities, each naturally exhibiting particle size differences. After blending, the particle size distribution of the blended ore after uniform mixing of different particle sizes is shown in the attached figure. Figure 2 ;like Figure 2 As shown, minerals of different particle sizes are basically evenly distributed after mixing, ensuring that the chemical composition of the mixed ore remains consistent regardless of where it is taken from after entering the steel plant and fed into the sintering process. This guarantees the stability of the raw material composition during production. However, mixed ore mixed at the port will inevitably experience vibration during transportation. As the mixed ore is in bulk, smaller particles will accumulate at the bottom of the transport container due to vibration, passing through the pores between larger particles. The particle size distribution of the finished mixed ore after long-distance transportation is shown in the attached figure. Figure 3 As shown.

[0030] like Figure 4 As shown, this embodiment of the invention provides a port-based method for the production and distribution of blended ore, comprising the following steps: S10: Obtain the preset transport particle size range value; obtain various simulated iron ore raw materials corresponding to the finished blended ore.

[0031] Understandably, in this embodiment, after the finished blended ore is completely mixed at the supply port and transported over a long distance, the fine particles at the bottom will accumulate, which will cause particle size segregation of the blended ore raw materials taken from different points. As a result, the quality of the blended ore will decrease significantly, leading to a decrease in sintering quality. Therefore, before producing the blended ore according to the production formula, a preset transport particle size range value is obtained to reduce particle size segregation of the finished blended ore during transportation.

[0032] Understandably, each target steel enterprise (and its blending yard) possesses its own abundant batching data, i.e., the production formula for blended ore. Each blended ore has corresponding blending ratios (production formulas) for different mineral types. Different steel enterprises have different requirements for the technical parameters of the blended ore. For a single steel enterprise, the requirement is that the various chemical components in the blended ore be stable. Therefore, it is necessary to obtain various simulated iron ore raw materials corresponding to the final product blended ore in the production formula. Specifically, in this invention, various simulated iron ore raw materials are determined according to the production formula.

[0033] Understandably, in this invention, the transport particle size range can be determined through historical experience or preset based on historical data, or it can be obtained through a software model. Furthermore, the upper and lower limits of the transport particle size range can be obtained through simulation experiments. The preset transport particle size range can be 3-10 mm, 4-9 mm, or 2-8 mm. Specifically, if the preset transport particle size range is obtained through a software model, a neural network algorithm is used to obtain a particle size segregation analysis model. This model can take various finished blended ores with different historical particle size ranges, historical transport methods, and corresponding historical transport mileages as input data, and historical segregation as the output result, thus accurately obtaining the particle size segregation analysis model. When the target steel enterprise knows the current transport method and the corresponding historical transport mileage, it can calculate the transport particle size range value based on the currently acceptable segregation result using the particle size segregation analysis model.

[0034] S20: Before entering the port premixing tank, each simulated iron ore raw material is screened to ensure that the particle size of each simulated iron ore raw material is within the transport particle size range, thereby obtaining various premixed iron ore raw materials.

[0035] Understandably, blended ore is composed of a combination of various simulated iron ore raw materials. Before the various premixed iron ore raw materials are blended, they are screened to ensure that the particle size of each simulated iron ore raw material is within the transport particle size range. Because the premixed iron ore raw materials exhibit less particle size segregation during transportation, it is beneficial to ensure the mixing degree of the finished blended ore arriving at the target steel enterprise. This avoids the technical problem of poor mixing degree of the finished blended ore that is completely blended at the supply port due to transportation segregation, requiring re-blending at the target steel enterprise, which leads to high processing costs and complicated processing procedures. Therefore, the requirement for low transport particle size segregation is low. Thus, it is necessary to preset the transport particle size range according to the actual needs of the steel enterprise and screen each simulated iron ore raw material according to the transport particle size range to ensure that the particle size of each premixed iron ore raw material is within the transport particle size range.

[0036] S30 is a mixture of various premixed iron ore raw materials to form a port blend.

[0037] Understandably, in actual production, the port uses a reclaimer to transport various premixed iron ore raw materials to the corresponding batching tanks via conveyors; multiple disc feeders then transport the corresponding premixed iron ore raw materials from the batching tanks to the metering system, with the disc feeders directly metering the feed amount while conveying; the metering system then sends the batched raw materials to a vertical high-intensity mixer, which uses a high-speed rotating agitator to achieve deep mixing of the raw materials, finally forming the port's mixed material.

[0038] S40 transports the port-mixed materials to the target steel enterprise.

[0039] Understandably, after the port blended ore is formed, different transportation devices are selected based on the geographical environment of the target steel enterprise to transport the port blended material to the target steel enterprise. The transportation device can be a cargo ship, a cargo ship, or a truck.

[0040] Furthermore, the step of "obtaining the transport particle size range of finished blended ore with a transport segregation degree within a preset segregation degree range" specifically includes: S11, establishing a transport segregation model of particle size distribution of finished blended ore using machine learning methods, taking various finished blended ore with different historical particle size range values, historical transport methods, and historical transport mileage corresponding to historical transport methods as input parameters, and historical transport segregation degree as output parameter; S12, obtaining the target demand address and port supply address of the target steel enterprise to determine the simulated supply route; S13, obtaining the transport particle size range of finished blended ore with a transport segregation degree within a preset segregation degree range based on the simulated supply route and the particle size distribution transport segregation model.

[0041] Understandably, the process begins by using machine learning to establish a transport segregation model for the particle size distribution of the finished blended ore. Then, at least one parameter from various finished blended ores with different historical particle size ranges, historical transport methods, and corresponding historical transport mileages is input into the model. Finally, the degree of historical transport segregation is output as the result. It's important to note that the target demand address of the target steel company needs to be obtained. Then, a simulated supply route is determined based on the port supply address and the target demand address of the steel company. Finally, based on the determined simulated supply route and the particle size distribution transport segregation model, the transport particle size range of the finished blended ore is obtained.

[0042] The present invention provides a port-based method for producing and distributing blended ore. This method sets the blending process at the port, obtaining the transport particle size range of the finished blended ore with a transport segregation degree within a preset range; acquiring various simulated iron ore raw materials corresponding to the finished blended ore; simultaneously screening each simulated iron ore raw material before it enters the port premixing tank to ensure that the particle size of each simulated iron ore raw material is within the transport particle size range, thus obtaining various premixed iron ore raw materials; batching these premixed iron ore raw materials to form port blended material; and then transporting the port blended material to the target steel enterprise via a transport device. Compared to traditional blending ore production methods, the port-based method for producing and distributing blended ore provides a significant improvement in the quality of the finished blended ore after long-distance transportation by controlling the particle size of each raw ore type in the port-produced blended ore within a reasonable range. This also avoids the need for each steel enterprise to establish its own dedicated blending yard (primary and secondary yards), thereby avoiding large-scale ore storage, reducing capital occupation, and minimizing yard space usage.

[0043] Optionally, the transport particle size range of the finished blended ore with a transport segregation degree within a preset segregation degree range is obtained as the preset transport particle size range value. For example, if the target steel company supplies material through supply port 1, and if the acceptable transport particle size segregation for the target steel company in actual processing is known to be α, and the transport route information between the target steel company and the supply port is known to be water transport, water transport mileage, rail transport, and rail transport mileage, and if the supply particle size supplied by the supply port to the target steel company is 3-10 mm, then the port blended material transported to the supply port meets the segregation requirements of the target steel company. Therefore, the preset transport particle size range value is determined to be 3-10 mm.

[0044] Further, the step of "obtaining the transport particle size range value of the finished blended ore with a transport segregation degree within the preset segregation degree range" specifically includes: S11, establishing a transport segregation model of particle size distribution of the finished blended ore using machine learning methods, taking various finished blended ores with different historical particle size range values, historical transport methods, and historical transport mileage corresponding to historical transport methods as input parameters, and historical transport segregation degree as output parameter; S12, obtaining the target demand address and port supply address of the target steel enterprise, and determining the simulated supply route; S13, obtaining the transport particle size range value of the finished blended ore with a transport segregation degree within the preset segregation degree range based on the simulated supply route and the particle size distribution transport segregation model. In this invention, by establishing a particle size distribution transport segregation model and determining the simulated supply route, and by obtaining the transport particle size range value of the finished blended ore with a transport segregation degree within the preset segregation degree range based on the simulated supply route and the particle size distribution transport segregation model, the preset transport particle size range value is obtained, facilitating the accurate and rapid acquisition of the preset transport particle size range value.

[0045] In practical implementation, to improve measurement accuracy, the particle size distribution transportation segregation model includes a particle size distribution waterway segregation model, a particle size distribution railway segregation model, and a particle size distribution roadway segregation model; the simulated delivery routes include waterway delivery routes and their corresponding waterway mileage, railway delivery routes and their corresponding railway mileage, and roadway delivery routes and their corresponding roadway mileage, wherein a single transportation mileage can be 0.

[0046] Understandably, different modes of transportation have corresponding particle size distribution transport segregation models. For example, water transport has a corresponding particle size distribution water transport segregation model, rail transport has a corresponding particle size distribution rail transport segregation model, and road transport has a corresponding particle size distribution road transport segregation model, which facilitates obtaining the transport particle size range values ​​of the finished blended ore under different transport modes.

[0047] Understandably, simulated supply routes include waterway supply routes and their corresponding waterway mileage, rail supply routes and their corresponding railway mileage, and road transport supply routes and their corresponding road transport mileage. Among these, road transport supply routes include high-level supply routes and low-level supply routes. If the simulated supply route to the target steel company only requires one segment by waterway and the other segment by road transport, then the rail transport mileage is 0; or if the simulated supply route to the target steel company only requires one segment by rail and the other segment by road transport, then the waterway transport mileage is 0.

[0048] Furthermore, historical data is used to obtain the particle size range value of the simulated blended material with a transport segregation degree within a preset segregation degree range, which is the preset transport particle size range value. In this invention, historical experiments are used to obtain the particle size range value of the simulated blended material with a transport segregation degree within a preset segregation degree range, which is the preset transport particle size range value. The specific operation steps are as follows: the transport particle size range value can be determined experimentally by setting the upper and lower limits of the particle size. For example, the finished blended ore is first loaded into a standard container, such as a truck bed, or a 1m³ container. 1m A standard 1m container was used; then samples were taken from the mixed ore cross-section at different heights, for example, 10cm. 10cm Take 10cm samples and record the particle size distribution of each cross section; then place the standard container on a vibration table and vibrate it under the same working conditions for a set duration (amplitude, frequency); or place the standard container on a vehicle such as a car and drive it on a regular road for a set distance, for example, transporting it 100km along a designated route in a port; next, take samples of the blended ore at different heights in the standard container, record its particle size composition, and compare it with samples from cross sections at different heights to obtain the degree of influence of long-distance transportation on the segregation of the blended ore components; then repeat the experiment with blended ore products with different upper and lower limits of particle size distribution, and fill the results into the "Particle Size Distribution-Transportation-Segregation" influence table; finally, determine the upper and lower limits of the blended ore particle size that the target steel enterprise can accept based on the segregation results.

[0049] Furthermore, the study found that when the transport particle size range is 3-10 mm, there is less transport segregation and better sintering effect.

[0050] Furthermore, before entering the port premixing tank, each simulated iron ore raw material is screened. Iron ore particles larger than 10 mm are removed from each simulated iron ore raw material to obtain the iron ore raw material to be screened, and iron ore particles smaller than 3 mm are removed from each iron ore raw material to be screened to obtain the premixed iron ore raw material. Understandably, in this invention, iron ore particles smaller than 3 mm can also be removed from each iron ore raw material to be screened to obtain the iron ore raw material to be screened, and iron ore particles larger than 10 mm can also be removed from each iron ore raw material to be screened to obtain the premixed iron ore raw material.

[0051] Furthermore, the transportation environment within the transportation timeframe is predicted. If the transportation environment is poor, the preset transportation particle size range is reduced and updated. Understandably, the transportation environment within the transportation timeframe is first predicted. If the vibration and bumps within the transportation timeframe are less than the depression value, a transportation particle size range matching the target steel enterprise is adopted, for example, a transportation particle size range of 3-10 mm. If the transportation environment within the transportation timeframe is poor, with vibration and bumps exceeding the first threshold, the transportation particle size range is reduced. For example, due to the poor transportation environment, to avoid the quality of the blended ore arriving at the target steel enterprise not meeting the target steel enterprise's requirements, the originally determined transportation particle size range of 3-10 mm is reduced to 4-9 mm, and the particle size range is updated before proceeding to the step of "obtaining various simulated iron ore raw materials corresponding to the finished blended ore".

[0052] Please refer to Figure 4 , Figure 5 and Figure 6 The present invention provides a specific port-based method for the production and distribution of blended ore as follows: A machine learning approach was used to establish a transport segregation model for the particle size distribution of finished blended ore. The model used various finished blended ores with different historical particle size ranges, historical transport methods, and corresponding historical transport mileage as input parameters, and the degree of historical transport segregation as the output parameter. The model obtained the target demand address of the target steel enterprise and the port supply address to determine the simulated supply route. Based on the simulated supply route and the particle size distribution transport segregation model, the transport particle size range of finished blended ore with a transport segregation degree within a preset range was determined. The preset transport particle size range was 3-10 mm. Obtain various simulated iron ore raw materials corresponding to the finished blended ore; Predict the transportation environment within the transportation time limit. If the transportation environment is poor, reduce the preset transportation particle size range value and update it, then proceed to the step "Obtain various simulated iron ore raw materials corresponding to the finished blended ore". If the transportation environment is good, proceed to the step "Obtain various simulated iron ore raw materials corresponding to the finished blended ore". Obtain various simulated iron ore raw materials corresponding to the finished blended ore; Before entering the port premixing tank, each simulated iron ore raw material is screened to ensure that the particle size of each simulated iron ore raw material is within the transport particle size range, thus obtaining various premixed iron ore raw materials. Various premixed iron ore raw materials are mixed to form port blended material; Transport the mixed materials from the port to the target steel company.

[0053] Please refer to Figure 7 The second aspect of this invention provides a port-based blended ore production and distribution system, comprising: an ore particle size range acquisition module for acquiring the transport particle size range of finished blended ore with a transport segregation degree within a preset range; an iron ore raw material analysis module for acquiring various simulated iron ore raw materials corresponding to the finished blended ore; a raw material screening device for screening each simulated iron ore raw material before it enters the port premixing tank, ensuring that the particle size of each simulated iron ore raw material is within the transport particle size range, thereby obtaining various premixed iron ore raw materials; a metering and blending device for batching various premixed iron ore raw materials to form port blended material; and a transport device for transporting the port blended material to the target steel enterprise.

[0054] As can be seen from the above technical solutions, the port-based blended ore production and distribution method and system provided by the embodiments of the present invention first obtains the transport particle size range of the finished blended ore with a transport segregation degree within a preset range, and obtains various simulated iron ore raw materials corresponding to the finished blended ore. Then, before entering the port premixing tank, each simulated iron ore raw material is screened to ensure that the raw material particle size of each simulated iron ore raw material is within the transport particle size range, thereby obtaining various premixed iron ore raw materials. These premixed iron ore raw materials are then batched to form port blended material. Finally, the port blended material is transported to the target steel enterprise via a transport device. This approach allows each steel enterprise to obtain blended ore that meets its needs without having to establish its own dedicated blending yard.

[0055] The present invention has been described in detail above with reference to specific embodiments and exemplary examples; however, these descriptions should not be construed as limiting the present invention. Those skilled in the art will understand that various equivalent substitutions, modifications, or improvements can be made to the technical solutions and embodiments of the present invention without departing from the spirit and scope of the invention, and all such modifications and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims.

Claims

1. A port-based method for producing and distributing blended ore, characterized in that, Includes the following steps: S10, obtain the preset transport particle size range value; predict the transport environment within the transport time limit; if the transport environment is poor, reduce the preset transport particle size range value and update it, and proceed to the step of obtaining various simulated iron ore raw materials corresponding to the finished blended ore; if the transport environment is good, proceed to the step of obtaining various simulated iron ore raw materials corresponding to the finished blended ore. Obtain various simulated iron ore raw materials corresponding to the finished blended ore; The specific steps of obtaining the preset transport particle size range value include: obtaining the transport particle size range value of the finished blended ore with a transport segregation degree within the preset segregation degree range as the preset transport particle size range value; S20, each simulated iron ore raw material is screened before entering the port premixing tank so that the particle size of each simulated iron ore raw material is within the transport particle size range, thus obtaining various premixed iron ore raw materials. S30 mixes various premixed iron ore raw materials to form a port blend; S40 transports the port blend to the target steel enterprise.

2. The port-based blending ore production and distribution method according to claim 1, characterized in that, The process of obtaining the transport particle size range value of the finished blended ore with a transport segregation degree within a preset segregation degree range specifically includes: S11. A particle size distribution transport segregation model for finished blended ore is established using machine learning. The input parameters are various finished blended ores with different historical particle size ranges, historical transport methods, and historical transport mileage corresponding to the historical transport methods. The output parameter is the degree of historical transport segregation. S12, obtain the target demand address and port supply address of the target steel enterprise, and determine the simulated supply route; S13. Based on the simulated supply route and particle size distribution transport segregation model, obtain the transport particle size range value of the finished blended ore with a transport segregation degree within the preset segregation degree range.

3. The port-based blending ore production and distribution method according to claim 2, characterized in that, The particle size distribution transport segregation model includes the particle size distribution water transport segregation model, the particle size distribution rail transport segregation model, and the particle size distribution vehicle transport segregation model; The simulated supply routes include waterway supply routes and their corresponding waterway mileage, rail supply routes and their corresponding railway mileage, and road transport supply routes and their corresponding road transport mileage.

4. The port-based blending ore production and distribution method according to claim 1, characterized in that, Historical data is used to obtain the particle size range of simulated mixed material with a transport segregation degree within the preset segregation degree range.

5. The port-based method for producing and distributing blended ore according to any one of claims 1 to 4, characterized in that, The preset transport particle size range is 3-10 mm.

6. The port-based blending ore production and distribution method according to claim 5, characterized in that, Before entering the port premixing tank, each simulated iron ore raw material is screened. Iron ore with a particle size greater than 10 mm is removed from each simulated iron ore raw material to obtain iron ore raw material to be screened, and iron ore with a particle size less than 3 mm is removed from each iron ore raw material to be screened to obtain premixed iron ore raw material.

7. A port-based blending ore production and distribution system, characterized in that, A port-based method for producing and distributing blended ore as claimed in any one of claims 1 to 6, comprising: Ore transport particle size range acquisition module: used to acquire the transport particle size range value of the finished blended ore with a transport segregation degree within a preset segregation degree range; Iron ore raw material analysis module: used to obtain various simulated iron ore raw materials corresponding to the finished blended ore; Raw material screening device: used to screen each type of simulated iron ore raw material before it enters the port premixing tank, so that the particle size of each type of simulated iron ore raw material is within the transport particle size range, and to obtain various premixed iron ore raw materials. Metering and mixing device: used to batch various premixed iron ore raw materials to form port blended material; transportation device: used to transport the port blended material to the target steel enterprise.

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