A method for automatically calculating and issuing raw material procurement demand planning system

Abstract

The invention relates to a method for automatically calculating and issuing a raw material procurement demand plan system, which belongs to the field of ironmaking and comprises the following steps: maintaining key parameters of the system; inputting the molten iron output of the next month into the system, calculating the metallurgical coke output of coke fed into the furnace according to the coke ratio, and calculating the total coke consumption according to the ratio of the metallurgical coke fed into the furnace to the total coke; automatically calculating the total coking coal consumption and the total consumption of the coal injection ratio according to the dry coal consumption per ton of coke and the coal injection ratio; inputting a monthly coking coal blending plan and a monthly coal injection plan, and calculating the demand for each single variety of coking coal and coal injection for the next month; selecting a date, calculating the consumption from the current to the end of the month, and automatically reading the inventory of the previous day to obtain the current inventory; inputting the target inventory at the end of the next month and the procurement plan arrival quantity from the current to the end of the month, and calculating the raw material procurement demand plan; adjusting the procurement demand plan and issuing the plan to the procurement system.

Description

Technical Field

[0001] The invention belongs to the field of ironmaking and relates to a method for automatically calculating and issuing a raw material procurement demand planning system. Background Art

[0002] The raw material procurement demand plan is a crucial purchasing basis for the procurement department. This plan is calculated based on molten iron production and then issued via official documents. However, the calculation of raw material procurement demand plans is complex and is always performed manually offline. This lack of intelligence makes calculation errors more likely and hinders procurement guidance. Summary of the Invention

[0003] In view of this, the object of the present invention is to provide a method for automatically calculating and issuing a raw material procurement demand planning system.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A method for automatically calculating and issuing a raw material procurement demand planning system includes the following steps:

[0006] S1: System maintenance key parameters;

[0007] S2: Input the next month's molten iron output into the system, calculate the coke consumption of metallurgical coke fed into the furnace based on the coke ratio, and automatically calculate the total coke consumption based on the proportion of metallurgical coke fed into the furnace to the total coke using the following formula:

[0008]

[0009]

[0010] S3: Based on the dry coal consumption per ton of coke and the coal injection ratio, the system automatically calculates the monthly coking coal consumption and coal injection consumption using the following formula:

[0011] Monthly coking coal consumption = total coke consumption × dry coal consumption per ton of coke

[0012]

[0013] S4: Enter the monthly coking coal blending plan and the monthly coal injection plan into the system; the system automatically calculates the demand for each type of coking coal and coal injection for the next month; the calculation method is as follows:

[0014] There are n coke ovens. The coking plan is allocated according to the production time of the coke ovens. The first coke oven is allocated with a coke output of x1, the second coke oven is allocated with a coke output of x2, and so on until the nth coke oven is allocated with a coke output of xn. For single-variety coal, the first coke oven is allocated with y1%, the second coke oven is allocated with y2%, and so on until the nth coke oven is allocated with yn%. The consumption of each single-variety coal, that is, the demand for each single-variety coal next month, is:

[0015] The demand for each type of coal next month = x1 × ton of dry coal consumed for coking × y1% + x2 × ton of dry coal consumed for coking × y2% + ... + xn × ton of dry coal consumed for coking × yn%

[0016] S5: Select a date in the system and calculate the consumption of each product from the current date to the end of the month. The calculation is as follows:

[0017] Consumption from the current date to the end of the month = Number of days remaining from the current date to the end of the month × Consumption of each product in the previous day

[0018] S6: The system automatically reads the previous day's inventory to obtain the current inventory. The target inventory for the end of next month and the planned purchase quantity from the current day to the end of the month are entered into the system. The system automatically calculates the raw material purchase demand plan for next month according to the following formula.

[0019] Inventory at the end of the month = current inventory - consumption from current to end of the month + planned purchase arrivals from current to end of the month

[0020] Next month's raw material purchase volume = Next month's demand for each type of coal + Target inventory at the end of next month - Inventory at the end of current month

[0021] S7: Adjust the purchase demand plan based on the system's automatic calculation, and send it to the procurement system after the adjustment is confirmed.

[0022] Furthermore, the key parameters for system maintenance include coke ratio, proportion of metallurgical coke fed into the furnace, dry coal consumption per ton of coke, and coal injection ratio.

[0023] Furthermore, the inventory at the end of this month = the current inventory + the planned purchase arrival quantity from now to the end of the month - the consumption quantity from now to the end of the month.

[0024] Furthermore, the target inventory for next month = the inventory at the end of this month + the planned purchase volume for next month - the usage demand for next month.

[0025] Furthermore, it also includes: entering the coke oven scheduled maintenance plan into the system, and automatically calculating the monthly production plan of each coke oven using the production time of each coke oven.

[0026] Furthermore, it also includes: modifying the coal coke coefficient of coal consumption per ton of coke in the system according to actual needs, and the system obtains the total coking coal consumption according to total coke consumption*coal consumption per ton of coke.

[0027] Furthermore, it also includes: the system obtains the consumption weight of each single type of coal according to the total coking coal consumption and the monthly coal blending plan, that is, the coking coal consumption for the next month.

[0028] Furthermore, the target inventory quantity for next month and the planned purchase quantity from now to the end of the month are entered into the system, and the planned purchase quantity for next month is automatically calculated.

[0029] Furthermore, the system first calculates the coking coal consumption corresponding to the output of each coke oven, and then summarizes and calculates the coking coal under the output of all coke ovens to obtain the total coking coal consumption.

[0030] The beneficial effects of the present invention are: the present invention realizes the automatic calculation of the procurement demand plan of raw materials such as coking coal and coal injection, the system issuance function, the formulation and issuance of the raw material procurement demand plan are intelligent, no manual offline calculation is required, and the document circulation is improved, thereby improving labor efficiency.

[0031] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0033] Figure 1 Schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0034] The following describes the embodiments of the present invention by means of specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0035] Among them, the accompanying drawings are only for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the dimensions of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings.

[0036] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] The present invention provides a method for automatically calculating and issuing a raw material procurement demand plan system. For steel joint ventures, the raw material procurement demand plan is an important basis for procurement by the procurement department, so the procurement plan must be accurate. At the same time, the procurement plan must be issued in a timely manner so that the procurement department can organize the production of raw materials in a timely and balanced manner according to the plan to meet production needs. Figure 1 As shown, the present invention includes the following steps:

[0038] 1. System maintenance key parameters, such as coke ratio, metallurgical coke ratio, dry coal consumption per ton of coke, and coal injection ratio;

[0039] 2. Enter the next month's molten iron production into the system, calculate the metallurgical coke consumption of coke entering the furnace based on the coke ratio, and automatically calculate the total coke consumption based on the proportion of metallurgical coke entering the furnace to the total coke. For example, if the system enters the next month's molten iron production of 500,000 tons and the coke ratio is 350 kg, the metallurgical coke consumption entering the furnace can be automatically calculated as 500,000 * 350 / 1,000 = 175,000 tons. Assuming that the proportion of metallurgical coke entering the furnace to the total coke is 0.87, the total coke consumption is 175,000 / 0.87 = 201,149 tons.

[0040] 3. The system automatically calculates the total coking coal consumption and the total coal injection consumption based on the dry coal consumption per ton of coke and the coal injection ratio. Assuming the dry coal consumption per ton of coke is 1.330 and the coal injection ratio is 160 kg, the monthly coking coal consumption (dry basis) is 201,149 * 1.33 = 267,528 tons, and the coal injection consumption is 500,000 * 160 / 1000 = 80,000 tons.

[0041] 4. The system enters the monthly coking coal blending plan and the monthly pulverized coal injection (CPI) plan. The system automatically calculates the next month's demand for each type of coking coal and CPI. Assuming the coke ovens are divided into three coking plants, each with its own production schedule, and that the coke production is allocated based on the coke ovens' production hours, with Coke Plant One producing 67,000 tons, Coke Plant Two producing 67,000 tons, and Coke Plant Three producing 67,149 tons. Assuming Coke Plant One uses 10% A-coal, Coke Plant Two uses 15% A-coal, and Coke Plant Three uses 10% A-coal, the A-coal consumption is 67,000 * 1.33 * 10% + 67,000 * 1.33 * 15% + 67,149 * 1.33 * 10% = 31,208 tons.

[0042] 5. Select a date and calculate the consumption from the current day to the end of the month. The system automatically reads the previous day's inventory to obtain the current inventory. Assuming the purchase demand plan is made on March 22, and the system reads that the consumption of coal A on March 21 is 1,000 tons, the consumption from the current day to the end of the month (March 22 to March 31) is 1,000 * 10 = 10,000 tons.

[0043] 6. The system enters the target inventory level at the end of next month;

[0044] 7. The system enters the planned purchase quantity from now to the end of the month;

[0045] 8. The system automatically calculates the raw material procurement demand plan. Assume the target inventory of Coal A at the end of next month is 8,000 tons. 10,000 tons are consumed from March 22 to March 31, with a planned arrival of 5,000 tons from March 22 to March 31. Assuming the inventory is 9,000 tons as of March 21, the end-of-month inventory on March 31 is 9,000 - 10,000 + 5,000 = 4,000 tons. 31,208 tons are consumed in April, and the end-of-month inventory is assumed to be 8,000 tons. Therefore, the April procurement volume of Coal A = 31,208 + 8,000 - 4,000 = 35,208 tons.

[0046] 9. Manual adjustments are made based on the purchase demand plan automatically calculated by the system, and after the adjustments are confirmed, they are sent to the procurement system.

[0047] Raw material procurement demand planning is divided into two modes: manual input and system automatic calculation:

[0048] Manual input mode: 1) Manual calculation based on output and consumption is directly entered into the system; 2) Manual adjustment is made based on last month's procurement demand plan to obtain new procurement demand; 3) According to current production needs, varieties or weights that need to be urgently purchased or adjusted are directly entered into the system.

[0049] System automatic calculation mode: Raw material procurement plan calculation rules are:

[0050] 1) Business personnel enter the molten iron production and coke oven maintenance plan into the system.

[0051] 2) Adjust consumption indicators, such as dry coal consumption per ton of coke (coal coke coefficient), coal injection ratio, etc.

[0052] 3) Business personnel enter the monthly ingredient plan into the system.

[0053] 4) Calculate the consumption for next month, and get the demand for each product according to the ratio, and get the demand for next month.

[0054] 5) Select a date to calculate the consumption from the current date to the end of the month.

[0055] Assuming that the current date is March 22, the system reads the current (March 21) raw material inventory and calculates the subsequent consumption for the month (the remaining days from March 22 to March 31, reads the single-day consumption on March 21, and calculates the total subsequent consumption from March 22 to March 31).

[0056] 6) Based on the selected date, the system automatically reads the inventory of the previous day to get the current inventory.

[0057] 7) The system enters the target inventory level at the end of next month.

[0058] 8) The planned purchase volume from now to the end of the month.

[0059] 9) The system automatically calculates the planned purchase volume for next month.

[0060] Inventory at the end of this month = current inventory + planned purchase volume from now to the end of the month - consumption from now to the end of the month

[0061] Next month's target inventory = inventory at the end of this month + next month's planned purchase volume - next month's usage demand

[0062] in:

[0063] System collection: current inventory, consumption from now to the end of the month, and demand for next month

[0064] Manual input: planned purchase volume from the current month to the end of the month, target inventory for the next month

[0065] In this embodiment, the steps of the automatic calculation system for raw material procurement demand plan are as follows:

[0066] 1) The system inputs the overall monthly molten iron production plan and the scheduled coke oven maintenance plan. The system automatically calculates the monthly production plan for each coke oven.

[0067] 2) Modify the dry coal consumption per ton of coke (coke coefficient) in the system according to actual needs. The system calculates the total coking coal consumption based on the coke oven production output * dry coal consumption per ton of coke.

[0068] 3) The system enters the monthly coal allocation plan for each coke oven.

[0069] 4) The system obtains the weight of each coke oven's single-type coal consumption, i.e., the coking coal consumption for the next month, based on the calculated total coking coal consumption and the monthly coal blending plan.

[0070] 5) The system enters the target inventory level for next month and the planned purchase volume from now to the end of the month.

[0071] 6) Click the Generate button and the system will automatically calculate the planned purchase volume for next month.

[0072] 7) The system first calculates the coking coal consumption corresponding to the output of each coke oven, and then summarizes and calculates the coking coal consumption of each coke oven under all coke oven outputs to obtain the total coking coal consumption.

[0073] 8) Click the Modify button in the system to modify the planned coking coal purchase demand quantity and then issue it.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for automatically calculating and issuing raw material procurement demand planning system, characterized by: The following steps are involved: S1: System maintenance key parameters; S2: Input the next month's molten iron output into the system, calculate the coke consumption of metallurgical coke fed into the furnace based on the coke ratio, and automatically calculate the total coke consumption based on the proportion of metallurgical coke fed into the furnace to the total coke using the following formula: S3: Based on the dry coal consumption per ton of coke and the coal injection ratio, the system automatically calculates the monthly coking coal consumption and coal injection consumption using the following formula: Monthly coking coal consumption = total coke consumption × dry coal consumption per ton of coke S4: Enter the monthly coking coal blending plan and the monthly coal injection plan into the system; the system automatically calculates the demand for each type of coking coal and coal injection for the next month; the calculation method is as follows: There are n coke ovens. The coking plan is allocated according to the production time of the coke ovens. The first coke oven is allocated with a coke output of x1, the second coke oven is allocated with a coke output of x2, and so on until the nth coke oven is allocated with a coke output of xn. For single-variety coal, the first coke oven is allocated with y1%, the second coke oven is allocated with y2%, and so on until the nth coke oven is allocated with yn%. The consumption of each single-variety coal, that is, the demand for each single-variety coal next month, is: The demand for each type of coal next month = x1 × ton of dry coal consumed for coking × y1% + x2 × ton of dry coal consumed for coking × y2% + ... + xn × ton of dry coal consumed for coking × yn% S5: Select a date in the system and calculate the consumption of each product from the current date to the end of the month. The calculation is as follows: Consumption from the current date to the end of the month = Number of days remaining from the current date to the end of the month × Consumption of each product in the previous day S6: The system automatically reads the previous day's inventory to obtain the current inventory. The target inventory for the end of next month and the planned purchase quantity from the current day to the end of the month are entered into the system. The system automatically calculates the raw material purchase demand plan for next month according to the following formula. Inventory at the end of the month = current inventory - consumption from current to end of the month + planned purchase arrivals from current to end of the month Next month's raw material purchase volume = Next month's demand for each type of coal + Target inventory at the end of next month - Inventory at the end of current month S7: Adjust the purchase demand plan based on the system's automatic calculation, and send it to the procurement system after the adjustment is confirmed.

2. The method for automatically calculating and issuing raw material procurement demand planning system according to claim 1, characterized in that: The key parameters for system maintenance include coke ratio, proportion of metallurgical coke entering the furnace, dry coal consumption per ton of coke, and coal injection ratio.

3. The method for automatically calculating and issuing raw material procurement demand planning system according to claim 1, characterized in that: Inventory at the end of this month = current inventory + planned purchase arrivals from now to the end of the month - consumption from now to the end of the month.

4. The method for automatically calculating and issuing raw material procurement demand planning system according to claim 1, characterized in that: Next month's target inventory level = inventory level at the end of this month + next month's planned purchase level - next month's usage demand.

5. The method for automatic calculation and issuance of raw material procurement demand planning system according to claim 1, characterized in that: Also includes: The coke oven scheduled maintenance plan is entered into the system, and the monthly production plan of each coke oven is automatically calculated using the production time of each coke oven.

6. The method for automatic calculation and issuance of raw material procurement demand planning system according to claim 1, characterized in that: Also includes: According to actual needs, modify the coal coke coefficient of coal consumption per ton of coke in the system. The system obtains the total coking coal consumption based on total coke consumption * coal consumption per ton of coke.

7. The method for automatic calculation and issuance of raw material procurement demand planning system according to claim 1, characterized in that: Also includes: The system obtains the consumption weight of each single type of coal based on the total coking coal consumption and the monthly coal blending plan, that is, the coking coal consumption for the next month.

8. The method for automatic calculation and issuance of raw material procurement demand planning system according to claim 1, characterized in that: Enter the target inventory for next month and the planned purchase quantity from now to the end of the month into the system, and automatically calculate the planned purchase quantity for next month.

9. The method for automatic calculation and issuance of raw material procurement demand planning system according to claim 1, characterized in that: The system first calculates the coking coal consumption corresponding to the output of each coke oven, and then summarizes and calculates the coking coal consumption of each coke oven under the output of all coke ovens.

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