A method for automatically generating material list for automatic feeding and economic operation of steelmaking

Abstract

The present invention relates to a method for automatically generating a bill of material for automatic feeding and economic operation of steelmaking, and belongs to the technical field of steelmaking. The technical scheme is: automatic generation of bill of material: generating a bill of material for feeding according to the material level of the silo, the bill of material for feeding includes the material name, set feeding tonnage, minimum feeding tonnage, underground silo number, current silo weight, converter silo number, silo high tonnage, feeding seconds, material code, converter silo radar level, radar level weight, interval seconds between two batches of materials, interval meters between two batches of materials and feeding flow rate; peak, valley and flat feeding mode: according to the silo usage and the time used for the silo usage, the available time of the remaining amount in the silo is calculated, and compared with the peak, valley and flat respectively, to obtain the feeding strategy. The present invention realizes automatic feeding according to the bill of material with less personnel input, less start and stop belts, group feeding, and multiple feeding in small batches to meet the operation conditions of the silo level of the converter between medium-high and medium-low, thereby reducing labor costs and energy consumption.

Description

Technical Field

[0001] The invention relates to a method for automatically generating a material list for automatic feeding and economic operation of steelmaking, and belongs to the technical field of steelmaking. Background Art

[0002] During the converter steelmaking process, different alloys and ore materials need to be added to the converter, and these ore materials are completed through the feeding system and the feeding system. The existing technical feeding system includes: underground silo, feeding chute, feeding trolley and feeding belt, etc. At present, steelmaking feeding mainly relies on manual operation, and peak, valley and flat time are not considered. Although it can meet normal production, accidents such as mixing of materials may occur due to operator errors during feeding, resulting in economic losses. Summary of the invention

[0003] The purpose of the present invention is to provide a method for automatically generating a material list for automatic feeding and economical operation of steelmaking, which can realize automatic feeding according to the material list with less personnel input, less belt starting and stopping, and group feeding, and meet the medium-high and medium-low operating conditions of the converter silo material level through small batch multiple feeding, reduce labor costs and energy consumption, and save production costs while ensuring normal production.

[0004] The technical solution of the present invention is:

[0005] A method for automatically generating a material list for automatic feeding and economic operation of steelmaking comprises the following steps:

[0006] ① Automatic generation of material list: Generate a material list based on the material level of the silo. The material list includes material name, set material tonnage, minimum material tonnage, underground silo number, current silo weight, converter silo number, silo high-level tonnage, material loading seconds, material code, converter silo radar level, radar level weight, interval between two batches of materials in seconds, interval between two batches of materials in meters, and material loading flow rate;

[0007] ② Peak, valley and flat feeding mode: According to the silo usage and the time used for silo usage, the available time of the remaining amount in the silo is calculated, and compared with the peak, valley and flat respectively to obtain the feeding strategy;

[0008] ③The peak, valley and flat levels are an electricity pricing strategy, referred to as peak, valley and flat, which sets different electricity price levels according to different time periods of electricity demand; the peak refers to the peak electricity price, which is the electricity price when the load of the power system reaches its peak, and is the period of the day with the largest electricity demand, such as a certain period of time during the day; the valley refers to the valley electricity price, which is the period when the load of the power system is lower, such as at night or in the early morning; the flat refers to the flat electricity price, which is the period of the day when the load is relatively stable, and the electricity price level is in the middle.

[0009] Furthermore, the silo material level is divided into four levels, namely high-high material level (HH), high material level (H), low material level (L) and low-low material level (LL).

[0010] Furthermore, the material list is automatically generated based on the peak-valley-flat time, the material level in the silo and the material density, and the generated material list is divided into D1 and D2 categories;

[0011] The D1 material list is: in the valley time of the peak-valley-normal time, when the material level is lower than the low material level (L), the material list is automatically generated, and the material list generated at this time is called D1; in the normal time of the peak-valley-normal time, when the material level is lower than the low material level (L), the material list is automatically generated, and the material list generated at this time is called D1; in the last half hour T of the normal time 后 When the material level is lower than the low material level (L), the material list will not be automatically generated. Instead, the available time T of the remaining amount in the silo is calculated based on the silo usage and the time used for the silo usage. 剩 and subsequent peak and spike duration T 峰 Compare, if T 剩 >T 后 +T 峰 , no bill of materials is generated, if T 剩 <T 后 +T 峰 , triggers the automatic generation of the bill of materials, and the bill of materials generated at this time is called D1 type;

[0012] The D2 material list is: peak and peak time T 峰 When the material level is lower than the low level (LL), the available time T of the remaining amount in the silo is calculated based on the silo usage and the time used for the silo usage. 剩 and subsequent peak and spike duration T 峰 Compare, if T 剩 >T 峰 , no bill of materials is generated, if T 剩 <T 峰 , triggering the automatic generation of the bill of materials. The bill of materials generated at this time is called D2 category.

[0013] Furthermore, the setting of the loading tonnage is related to the type of bill of materials; when the generated bill of materials is of type D1, the loading tonnage W1 is set to the high-high material weight W HH , minus the radar level weight W Z , minus the silo safety margin weight W Y , that is, W1=W HH -W Z -W Y ;

[0014] When the generated material list is D2, set the loading tonnage W2 to the high material level weight W H , minus the low material level weight WLL Divide by 2, that is, W2=(W H -W LL ) / 2.

[0015] Furthermore, the number of seconds between the two batches of materials ensures that the unloading trolley arrives at the bin in advance and is ready to unload materials when the material flow arrives at the bin; the number of seconds between the two batches of materials is equal to the bin changing time of the unloading trolley plus the safety interval margin time.

[0016] Furthermore, the number of meters between the two batches of material is obtained from the number of seconds between the two batches of material, and the number of meters between the two batches of material=the number of seconds between the two batches of material / the belt running speed.

[0017] Furthermore, there is a corresponding relationship between the converter silo number and the underground silo number.

[0018] Furthermore, the minimum loading tonnage is the tonnage of material loaded within 20 seconds, and loading is allowed only when the loading amount is greater than the minimum loading tonnage.

[0019] Furthermore, the feed flow rate is the feed flow rate of the underground silo vibration screen.

[0020] Furthermore, the feeding seconds=set feeding tons / feeding flow rate.

[0021] Further, when the silo reaches the high-high level (HH), the belt stops and stops feeding the silo.

[0022] Furthermore, the material lists are arranged in sequence and executed in turn. When the material level in the silo is lower than the low-low level (LL), the priority of the material list is increased and the material list is executed after the previous material list is executed.

[0023] The beneficial effects of the present invention are as follows: with less manpower input, automatic loading according to the material list can be realized, with fewer belt starts and stops, and loading in groups. By loading in small batches multiple times, the material level of the converter silo can be kept between medium-high and medium-low operating conditions, thereby reducing labor costs and energy consumption, and saving production costs while ensuring normal production. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a peak, valley and flat time division diagram of an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the material level of a silo according to an embodiment of the present invention;

[0026] Figure 3 is a flow chart of an embodiment of the present invention;

[0027] Figure 4 Details of the bill of materials generated for the embodiment of the present invention;

[0028] Figure 5Implementation diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The present invention will be further described below by way of examples with reference to the accompanying drawings.

[0030] A method for automatically generating a material list for automatic feeding and economic operation of steelmaking comprises the following steps:

[0031] ① Automatic generation of material list: Generate a material list based on the material level of the silo. The material list includes material name, set material tonnage, minimum material tonnage, underground silo number, current silo weight, converter silo number, silo high-level tonnage, material loading seconds, material code, converter silo radar level, radar level weight, interval between two batches of materials in seconds, interval between two batches of materials in meters, and material loading flow rate;

[0032] ② Peak, valley and flat feeding mode: According to the silo usage and the time used for silo usage, the available time of the remaining amount in the silo is calculated, and compared with the peak, valley and flat respectively to obtain the feeding strategy;

[0033] ③The peak, valley and flat levels are an electricity pricing strategy, referred to as peak, valley and flat, which sets different electricity price levels according to different time periods of electricity demand; the peak refers to the peak electricity price, which is the electricity price when the load of the power system reaches its peak, and is the period of the day with the largest electricity demand, such as a certain period of time during the day; the valley refers to the valley electricity price, which is the period when the load of the power system is lower, such as at night or in the early morning; the flat refers to the flat electricity price, which is the period of the day when the load is relatively stable, and the electricity price level is in the middle.

[0034] In an embodiment, Figure 2 As shown, the silo material level is divided into four levels, namely high-high material level (HH), high material level (H), low material level (L) and low-low material level (LL).

[0035] The corresponding formula for silo level and weight is as follows:

[0036] When the silo level is at the high-high level (HH), the corresponding formula between the silo level and weight is as follows:

[0037]

[0038] Among them, s1 is the length of the side of the prism part of the silo, s3 is the length of the lower bottom side of the prism part of the silo, h1 is the height of the prism part of the silo, h2 is the height from the low material level (L) to the low-low material level (LL), h3 is the height from the high material level (H) to the low material level (L), h4 is the height from the high-high material level (HH) to the high material level (H), and ρ is the material density.

[0039] When the silo material level is at the high level (H), the corresponding formula of silo material level and weight is as follows:

[0040]

[0041] Among them, s1 is the length of the side of the prism part of the silo, s3 is the length of the lower bottom side of the prism part of the silo, h1 is the height of the prism part of the silo, h2 is the height from the low material level (L) to the low-low material level (LL), h3 is the height from the high material level (H) to the low material level (L), and ρ is the material density.

[0042] When the silo material level is at the low level (L), the corresponding formula of the silo material level and weight is as follows:

[0043]

[0044] Among them, s1 is the side length of the prism part of the silo, s3 is the length of the lower bottom side of the prism part of the silo, h1 is the height of the prism part of the silo, h2 is the height from the low material level (L) to the low-low material level (LL), and ρ is the material density.

[0045] When the silo level is at the low level (LL), the corresponding formula between the silo level and weight is as follows:

[0046]

[0047] Among them, s1 is the side length of the prism part of the silo, s3 is the length of the lower base side of the prism part of the silo, h1 is the height of the prism part of the silo, and ρ is the material density.

[0048] In summary, when the silo level is above the lower level (LL), the corresponding formula for the silo level and weight is as follows:

[0049]

[0050] Among them, h is not limited to a specific height, h is any height between the high material level (HH) and the low material level (LL), that is, 0≦h≦h2+h3+h4. s1 is the length of the side of the prism part of the silo, s3 is the length of the lower bottom side of the prism part of the silo, h1 is the height of the prism part of the silo, and ρ is the material density.

[0051] In particular, when the silo level is below the minimum, the corresponding formula between the silo level and weight is as follows:

[0052]

[0053] Among them, h5 is the material level height when it is lower than the low material level, s1 is the side length of the prism part of the silo, s2 is the side length of the prism part of the silo at the h5 material level height, s3 is the length of the lower bottom side of the prism part of the silo, and ρ is the material density.

[0054] Combined with Figure 1 and 3The material list is automatically generated based on the peak-valley-flat time, the material level in the silo and the material density. The generated material list is divided into D1 and D2 categories.

[0055] The D1 material list is: in the valley time of the peak-valley-normal time, when the material level is lower than the low material level (L), the material list is automatically generated, and the material list generated at this time is called D1; in the normal time of the peak-valley-normal time, when the material level is lower than the low material level (L), the material list is automatically generated, and the material list generated at this time is called D1; in the last half hour T of the normal time 后 When the material level is lower than the low material level (L), the material list will not be automatically generated. Instead, the available time T of the remaining amount in the silo is calculated based on the silo usage and the time used for the silo usage. 剩 and subsequent peak and spike duration T 峰 Compare, if T 剩 >T 后 +T 峰 , no bill of materials is generated, if T 剩 <T 后 +T 峰 , triggers the automatic generation of the bill of materials. The bill of materials generated at this time is called D1 category.

[0056] The D2 material list is: peak and peak time T 峰 When the material level is lower than the low level (LL), the available time T of the remaining amount in the silo is calculated based on the silo usage and the time used for the silo usage. 剩 and subsequent peak and spike duration T 峰 Compare, if T 剩 >T 峰 , no bill of materials is generated, if T 剩 <T 峰 , triggering the automatic generation of the bill of materials. The bill of materials generated at this time is called D2 category.

[0057] The setting of the loading tonnage is related to the type of bill of materials; when the generated bill of materials is of type D1, the setting of the loading tonnage W1 is the high-high material weight W HH Subtract radar level weight W Z , minus the silo safety margin weight W Y , that is, W1=W HH -W Z -W Y ;

[0058] When the generated material list is D2, set the loading tonnage W2 to the high material level weight W H Subtract the low material level weight W LL Divide by 2, that is, W2=(W H -W LL ) / 2.

[0059] Combination Figure 5The description of this embodiment is as follows:

[0060] There are 7 underground silos, 24 converter silos, a discharge trolley, a material flow switch, etc. Click the "Allow" button, the "Fully Automatic Loading" display turns green, and the system switches to fully automatic loading mode. Confirm that the underground silo vibrating feeder is in automatic state, the belt is in automatic state, the discharge trolley is in automatic state, and there is no alarm for automatic loading; in the state of "all automatic loading conditions are met", the material list is automatically generated and automatically executed; during the loading process, you can observe the material flow display, batch data display, material flow switch, belt scale display status, discharge trolley position, discharge trolley material name, underground silo material level, converter silo material level change, etc. During the automatic loading process, you can click the "Material List Stop" button to terminate the loading.

[0061] Open the bill of materials screen and confirm the generated bill of materials, such as Figure 5 shown.

[0062] The interval between the two batches of materials in seconds ensures that the unloading trolley arrives at the bin in advance and is ready to unload the materials before the material flow arrives at the bin. The interval between the two batches of materials in seconds is equal to the bin change time of the unloading trolley plus the safety interval margin time.

[0063] The number of meters between the two batches of material is obtained from the number of seconds between the two batches of material. The number of meters between the two batches of material=the number of seconds between the two batches of material / the belt running speed.

[0064] There is a corresponding relationship between the converter silo number and the underground silo number. When generating a material list, the material code of the converter silo is compared with the material code of the underground silo. After finding the corresponding material code, the converter silo number and the underground silo number are matched.

[0065] The minimum loading tonnage is the tonnage that can be loaded within 20 seconds. Loading is allowed only when the loading amount is greater than the minimum loading tonnage.

[0066] The radar level of the converter silo shows the current height of the converter silo. The radar level weight shows the weight of the remaining material in the silo calculated by the radar level of the converter silo.

[0067] The current silo weight is the theoretical calculated weight, which is the initial silo weight + belt loading weight - silo unloading weight.

[0068] The feeding seconds = set feeding tons / feeding flow rate.

[0069] When the silo reaches the high material level (HH), the belt stops and stops feeding material into the silo.

[0070] The material lists are arranged in sequence and executed in turn. When the material level in the silo is lower than the low-low level (LL), the priority of the material list is increased and the material list is executed after the previous material list is executed.

[0071] The method of the present invention can realize multiple loading of small batches, meet the operating conditions of the converter bunker material level between medium-high and medium-low, reduce labor costs, and save production costs under the premise of ensuring normal production.

Claims

1. A method for automatically generating a material list for automatic feeding and economic operation of steelmaking, characterized in that The following steps are included: ① Automatic generation of material list: Generate a material list based on the material level of the silo. The material list includes material name, set material tonnage, minimum material tonnage, underground silo number, current silo weight, converter silo number, silo high-level tonnage, material loading seconds, material code, converter silo radar level, radar level weight, interval between two batches of materials in seconds, interval between two batches of materials in meters, and material loading flow rate; ② Peak, valley and flat feeding mode: According to the silo usage and the time used for silo usage, the available time of the remaining amount in the silo is calculated, and compared with the peak, valley and flat respectively to obtain the feeding strategy; ③ The peak, valley and flat are a kind of electricity pricing strategy, referred to as peak, valley and flat, which sets different electricity price levels according to different time periods of electricity demand; the peak refers to the peak electricity price, which is the electricity price when the load of the power system reaches its peak, which is the time period of the day when the electricity demand is the largest; the valley refers to the valley electricity price, which is the time period when the load of the power system is relatively low; the flat refers to the flat electricity price, which is the time period of the day when the load is relatively stable, and the electricity price level is in the middle; The silo material level is divided into four levels, namely high-high material level (HH), high material level (H), low material level (L) and low-low material level (LL); The automatic generation of the bill of materials is based on the peak-valley-flat time, the material level of the silo and the material density. The generated bill of materials is divided into D1 and D2 categories; The D1 material list is: in the valley time of the peak-valley-normal time, when the material level is lower than the low material level (L), the material list is automatically generated, and the material list generated at this time is called D1; in the normal time of the peak-valley-normal time, when the material level is lower than the low material level (L), the material list is automatically generated, and the material list generated at this time is called D1; in the last half hour of the normal time T 后 When the material level is lower than the low material level (L), the material list will not be automatically generated. Instead, the available time T of the remaining amount in the silo is calculated based on the silo usage and the time used for the silo usage. 剩 and subsequent peak and spike duration T 峰 Compare, if T 剩 >T 后 +T 峰 , no bill of materials is generated, if T 剩 <T 后 +T 峰 , triggers the automatic generation of the bill of materials, and the bill of materials generated at this time is called D1 type; The D2 material list is: peak and peak time T 峰 When the material level is lower than the low level (LL), the available time T of the remaining amount in the silo is calculated based on the silo usage and the time used for the silo usage. 剩 and subsequent peak and spike duration T 峰 Compare, if T 剩 >T 峰 , no bill of materials is generated, if T 剩 <T 峰 , triggering the automatic generation of the bill of materials, the bill of materials generated at this time is called D2 type; The setting of the loading tonnage is related to the type of bill of materials; when the generated bill of materials is of type D1, the setting of the loading tonnage W1 is the high-high material weight W HH Subtract radar level weight W Z , minus the silo safety margin weight W Y , that is, W1=W HH -W Z -W Y ; When the generated material list is D2, set the loading tonnage W2 to the high material level weight W H Subtract the low material level weight W LL Divide by 2, that is, W2=(W H -W LL ) / 2; The number of seconds between the two batches of materials ensures that the unloading trolley arrives at the bin in advance and is ready to unload materials when the material flow arrives at the bin; the number of seconds between the two batches of materials is equal to the bin changing time of the unloading trolley plus the safety interval margin time.

2. The method for automatically generating a material list for automatic feeding and economic operation of steelmaking according to claim 1, characterized in that: The number of meters between the two batches of material is obtained from the number of seconds between the two batches of material. The number of meters between the two batches of material = the number of seconds between the two batches of material / the belt running speed.

3. The method for automatically generating a material list for automatic feeding and economic operation of steelmaking according to claim 1 is characterized in that: The minimum loading tonnage is the tonnage that is loaded within 20 seconds. Loading is allowed only when the loading amount is greater than the minimum loading tonnage.

4. The method for automatically generating a material list for automatic feeding and economic operation of steelmaking according to claim 1, characterized in that: The feeding seconds = set feeding tonnage / feeding flow rate.

5. The method for automatically generating a material list for automatic feeding and economic operation of steelmaking according to claim 1 is characterized in that: When the silo reaches the high material level (HH), the belt stops and stops feeding material into the silo.

6. The method for automatically generating a material list for automatic feeding and economic operation of steelmaking according to claim 1, characterized in that: The material lists are arranged in sequence and executed in turn. When the material level in the silo is lower than the low-low level (LL), the priority of the material list is increased and the material list is executed after the previous material list is executed.

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