Carbon dioxide discharge amount calculation system, carbon dioxide discharge amount calculation program and carbon dioxide discharge amount calculation method

Abstract

To provide a carbon dioxide discharge amount calculation system, a carbon dioxide discharge amount calculation program and a carbon dioxide discharge amount calculation method which can calculate a carbon dioxide discharge amount while reflecting on the reality of coal absorption into molten metal.SOLUTION: A carbon dioxide discharge amount calculation system 10 for calculating the discharge amount of carbon dioxide discharged from a cupola comprises a data calculation unit 12b. The data calculation unit 12b, per kind of feeding materials to be fed into the cupola, multiplies the weight fed within a prescribed time by the carbon mass fraction of each material to calculate a fed carbon amount, and further, per kind of discharge matters discharged from the cupola, multiples the weight discharged within a prescribed time by the carbon mass fraction of each matter to calculate a discharge carbon amount. Then, a subtracted carbon amount obtained by subtracting the discharge carbon amount from the fed carbon amount is converted into a carbon dioxide discharge amount to calculate the carbon dioxide discharge amount.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a carbon dioxide emission calculation system, a carbon dioxide emission calculation program, and a carbon dioxide emission calculation method.

Background Art

[0002] In the manufacturing process of castings, a cupola is used as a material melting device. A cupola is a furnace that melts materials such as iron and generates molten metal. In a cupola, coke made from coal is used as fuel, so carbon dioxide is emitted during operation of the cupola. Since carbon dioxide is a greenhouse gas, management of its emission amount is required for measures against global warming.

[0003] In an industry such as the manufacture of castings, when a fuel such as coke is used and the carbon component contained in the fuel is emitted as carbon dioxide, a method for calculating the emission amount of the carbon dioxide is defined by guidelines (see Non-Patent Document 1). Specifically, for each type of fuel, the calorific value is calculated by multiplying the usage amount by the calorific value per unit, and the emission amount of carbon is calculated by multiplying the calorific value by the carbon emission coefficient. Then, it is calculated by converting to the carbon dioxide emission amount by multiplying the carbon emission amount by "44 / 12 = 3.67". Note that "44 / 12" is the ratio of the weight of one carbon atom to one carbon dioxide molecule.

Prior Art Documents

Non-Patent Documents

[0004]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] As described above, in the molten metal production by a cupola, although coke is used as fuel, it is generally known that a part of carbon, which is a component of coke, transfers (absorbs carbon) to the molten metal component. Therefore, not all of the carbon components of the coke charged into the cupola as fuel are discharged as carbon dioxide. Nevertheless, the above-described method for calculating carbon dioxide emissions (current calculation method) assumes that all of the carbon components of coke become carbon dioxide and are discharged. Therefore, the current calculation method has a problem that the actual carbon dioxide emissions are not reflected and more carbon dioxide emissions are calculated.

[0006] The present invention has been made in view of such circumstances, and an object thereof is to provide a carbon dioxide emissions calculation system, a carbon dioxide emissions calculation program, and a carbon dioxide emissions calculation method that can calculate carbon dioxide emissions reflecting the actual situation of carbon absorption into molten metal.

Means for Solving the Problems

[0007] To achieve the above object, the carbon dioxide emissions calculation system of the present invention includes an input carbon amount calculation means for calculating an input carbon amount by multiplying the weight input within a predetermined time by the carbon mass fraction of the material for each type of input material charged into the cupola, an output carbon amount calculation means for calculating an output carbon amount by multiplying the weight output within the predetermined time by the carbon mass fraction of the substance for each type of output substance discharged from the cupola, a carbon dioxide emissions calculation means for calculating carbon dioxide emissions by converting the difference carbon amount obtained by subtracting the output carbon amount from the input carbon amount into carbon dioxide emissions, and is provided with.

Effects of the Invention

[0008] According to the present invention, in order to calculate the amount of carbon dioxide emissions discharged from the cupola by subtracting the amount of carbon contained in the discharged substances discharged within a predetermined time from the amount of carbon contained in the charged materials charged within the same time, the amount of carbon emissions discharged does not include the carbon components absorbed by the molten metal. In order to convert the amount of carbon emissions discharged into the amount of carbon dioxide emissions, it is possible to calculate the amount of carbon dioxide emissions that reflects the actual state of carbon absorption into the molten metal.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Embodiments for Carrying Out the Invention

[0010] Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings.

[0011] The carbon dioxide emissions calculation system, carbon dioxide emissions calculation program, and carbon dioxide emissions calculation method of the present embodiment are used for calculating the amount of carbon dioxide emissions discharged from the cupola in the melting process when manufacturing cast products.

[0012] [Configuration of Carbon Dioxide Emissions Calculation System] As shown in FIG. 1, the carbon dioxide emissions calculation system 10 includes a carbon dioxide emissions calculation device 11. The carbon dioxide emissions calculation device 11 has a system control unit 12 that controls the system, a memory 13, a data storage device 14, a data input unit 15, an information display unit 16, and a network interface 17. These are connected through a data bus 18 and can transmit and receive information to and from each other.

[0013] The system control unit 12 is a microcomputer composed of a CPU or the like. The memory 13 is a non-volatile storage unit, and stores a carbon dioxide emission calculation program 19 executed by the carbon dioxide emission calculation system 10. In the data storage device 14, various databases 21 to 23 as storage means are stored. The network interface 17 is an interface unit for connecting the carbon dioxide emission calculation device 11 to various devices outside the device. Therefore, the network interface 17 corresponds to the data collection means.

[0014] As various devices connected to the carbon dioxide emission calculation device 11 through the network interface 17, first, a device for measuring the weights of the materials input into the cupola and the discharged substances discharged from the cupola is provided. The device includes a charging material weighing device 31, a molten metal weighing device 32, and a waste weighing device 33. All of these correspond to the weighing means.

[0015] The charging material weighing device 31 is provided in a material supply device or the like for various materials input into the cupola, and measures the weight of each type of charging material. The charging materials to be weighed include main materials, auxiliary materials, limestone, etc. that become molten metal materials. The main materials are briquettes containing scrap iron, defective products of products, return materials such as runners, and cutting chips generated during product processing, and are individually weighed by type before being input into the cupola. The main material weight data obtained by weighing the main materials is linked to the date and time of weighing each time and transmitted to the carbon dioxide emission calculation device 11.

[0016] The auxiliary materials are coke, anthracite, formed charcoal, etc. that serve as fuel, and these are also individually weighed by type before being charged into the cupola. For example, regarding the auxiliary materials, there are brands differentiated by domestic products, imported products, quality grades, etc., and the types differ for each brand. The auxiliary material weight data obtained by weighing the auxiliary materials is linked to the date and time of weighing and the type each time weighing is performed and is transmitted to the carbon dioxide emission calculation device 11. Limestone is also individually weighed before being charged into the cupola. The limestone weight data obtained by weighing the limestone is linked to the date and time of weighing and the type each time weighing is performed and is transmitted to the carbon dioxide emission calculation device 11.

[0017] The molten metal weighing device 32 is provided in the forehearth or the ladle and measures the weight of the molten metal flowing out from the cupola. The weight of the molten metal is measured each time it flows out from the cupola and is stored in the forehearth or the ladle. The weight numerical data obtained by that weighing is linked to the date and time of weighing each time weighing is performed and is transmitted to the carbon dioxide emission calculation device 11.

[0018] The waste weighing device 33 weighs the waste generated by the operation of the cupola by type. The wastes to be weighed include cupola slag, melting dust, etc. Melting dust is dust, powder, etc. recovered by a dust collector through which the exhaust gas of the cupola passes before being discharged to the outside. Cupola slag is removed from the surface each time the molten metal flowing out from the cupola is stored in the forehearth or the ladle, and its weight is measured. Melting dust is automatically discharged from the dust collector, and its weight is measured regularly. The weight numerical data of the cupola slag and melting dust obtained by that weighing is linked to the date and time of weighing each time weighing is performed and is transmitted to the carbon dioxide emission calculation device 11.

[0019] Next, as a device connected to the carbon dioxide emission calculation device 11, a carbon component analyzer 34 for measuring the carbon mass fraction of input materials and discharged substances is provided. The carbon component analyzer 34 corresponds to the carbon component analysis means. The measurement of the carbon mass fraction using the carbon component analyzer 34 is performed by a method defined by JIS standards. Note that the transmission of measurement value data may be performed not automatically from the carbon component analyzer 34 but by inputting a numerical value from the data input unit 15.

[0020] The main materials, auxiliary materials, and limestone input materials are sampled for each lot carried into the workplace, and the carbon mass fraction is measured by the carbon component analyzer 34. The numerical data obtained by the measurement is linked to the measurement date and time and the type of material each time the measurement is made, and is transmitted to the carbon dioxide emission calculation device 11.

[0021] Each time the molten metal flows out of the cupola and is stored in the forehearth or ladle, or each time the forehearth or ladle receives molten metal a predetermined number of times, it is sampled and the carbon mass fraction is measured by the carbon component analyzer 34. The numerical data obtained by the measurement is linked to the measurement date and time each time the measurement is made, and is transmitted to the carbon dioxide emission calculation device 11.

[0022] Each time the cupola slag is removed from the forehearth or ladle, the carbon mass fraction of the cupola slag is measured by the carbon component analyzer 34. The numerical data obtained by the measurement is linked to the measurement date and time each time the measurement is made, and is transmitted to the carbon dioxide emission calculation device 11.

[0023] For the molten dust, the collected molten dust is sampled, and the carbon mass fraction is measured by the carbon component analyzer 34. Note that the timing of sampling for measuring the carbon mass fraction of the molten dust is arbitrary, and it may be measured each time the collection bag provided in the dust collector is replaced, or it may be measured during weight measurement.

[0024] Next, as a device connected to the carbon dioxide emission calculation device 11, an exhaust gas measurement device 40 that performs various measurements on the exhaust gas discharged from the cupola is provided. The device includes an exhaust gas flow meter 41, an exhaust gas thermometer 42, and an exhaust gas component analyzer 43. All of these correspond to exhaust gas measurement means.

[0025] The exhaust gas flow meter 41 is provided in the chimney and measures the flow rate of the exhaust gas discharged from the chimney to the outside through the dust collector. The exhaust gas thermometer 42 is also provided in the chimney and measures the temperature of the exhaust gas discharged from the chimney. The exhaust gas component analyzer 43 is also provided in the chimney and measures the component concentration of carbon monoxide contained in the exhaust gas discharged from the chimney. Each numerical data of the exhaust gas flow rate, exhaust gas temperature, and carbon monoxide concentration measured by the exhaust gas measurement device 40 is sequentially transmitted to the carbon dioxide emission calculation device 11.

[0026] The data processing unit 12a of the system control unit 12 stores various numerical data received from the input material weighing device 31, molten metal weighing device 32, waste weighing device 33, carbon component analyzer 34, exhaust gas flow meter 41, exhaust gas thermometer 42, and exhaust gas component analyzer 43 in the data storage device 14 of the data storage device 14. In the data storage device 14, a weight database 21, a carbon component ratio database 22, and an exhaust gas database 23 are provided.

[0027] The weight database 21 stores weight numerical data for each type of main material, auxiliary material, limestone, molten metal, cupola slag, and melting dust. The carbon component ratio database 22 stores numerical data of the carbon mass fraction for each type of main material, auxiliary material, limestone, molten metal, cupola slag, and melting dust. The exhaust gas database 23 stores numerical data of the flow rate, temperature, and carbon monoxide concentration of the exhaust gas.

[0028] The system control unit 12 has a data calculation unit 12b in addition to the data processing unit 12a. The data calculation unit 12b performs calculations for carbon dioxide emissions using a large number of numerical data stored in the databases 21 to 23. In addition to the information obtained by the calculations, various numerical data and the like stored in the databases 21 to 23 are displayed on the information display unit 16.

[0029] [Carbon Dioxide Emission Calculation Process] Next, a carbon dioxide emission calculation process for calculating the amount of carbon dioxide emitted from the cupola based on the numerical data of various information collected in the melting process using the cupola will be described. The execution of the carbon dioxide emission calculation process is mainly performed by the system control unit 12 of the carbon dioxide emission calculation device 11 according to the carbon dioxide emission calculation program 19 stored in the memory 13.

[0030] As shown in FIG. 2, first, in step S11, at the data input unit 15, the period for calculating the carbon dioxide emissions is input. The input period is arbitrary, and it is possible to freely input in time units, month units, year units, etc.

[0031] In step S12, as an input carbon amount calculation step, an input carbon amount calculation process is executed. In the input carbon amount calculation process, the carbon amount of the materials charged into the cupola is calculated. The data processing unit 12a of the system control unit 12 extracts the weight numerical data for each type of charged material stored in the weight database 21 for the period input in step S11. At the same time, the data processing unit 12a extracts the past average values of the carbon mass fractions for each type of main material, auxiliary material, and limestone, and the average value of the carbon mass fraction of the molten metal, stored in the carbon component ratio database 22. The period for calculating the average value is arbitrary, and it may be the average over the entire past period or the average of the period input in step S11.

[0032] On top of that, the data calculation unit 12b of the system control unit 12 multiplies the extracted weight value by the extracted carbon mass fraction for each type of input material to calculate the carbon amount for each type of input material. Then, the carbon amounts of all types are summed up to calculate the input carbon amount. Therefore, the data calculation unit 12b corresponds to the input carbon amount calculation means. Regarding the carbon mass fraction of the return material, it is regarded as the same as the carbon mass fraction of the molten metal and is used. The calculated input carbon amount is temporarily stored in the memory 13. Table 1 shows an example of the calculation of the input carbon amount when the period is set to one month in step S11.

[0033]

Table 1

[0034] On top of that, the data calculation unit 12b of the system control unit 12 multiplies the extracted weight value by the extracted carbon mass fraction for each type of discharged substance to calculate the carbon amount for each type of discharged substance. Then, the carbon amounts of all types are summed up to calculate the discharged carbon amount. Therefore, the data calculation unit 12b corresponds to the discharged carbon amount calculation means. The calculated discharged carbon amount is temporarily stored in the memory 13. Table 2 shows an example of the calculation of the discharged carbon amount when the period is in accordance with the example in Table 1.

[0035]

Table 2

[0036] Incidentally, in the calculation examples of Table 1 and Table 2, when calculating the carbon dioxide emission amount using the conventional calculation method as a comparative example, multiplying the total amount of coke "250t + 950t = 1200t" by "unit calorific value × carbon emission coefficient × (44 / 12) = 3.67", the carbon dioxide emission amount is "3804t". Therefore, in the comparison with the comparative example, a difference in emission amount of "3804 - 3462 = 342t" occurs in one month, and a more accurate carbon dioxide emission amount can be calculated than the conventional calculation method. The calculated carbon dioxide emission amount is displayed by the information display unit 16.

[0037] Here, the exhaust gas from the cupola contains not only carbon dioxide but also carbon monoxide. Nevertheless, in the carbon dioxide emission calculation process of step S14, all of the difference obtained by subtracting the discharged carbon amount from the input carbon amount to the cupola is converted into the amount of carbon dioxide. Therefore, the carbon dioxide emission amount calculated in this step S14 also includes the emission portion of carbon monoxide.

[0038] Therefore, in order to calculate the carbon dioxide emissions more accurately, in the subsequent step S15, a carbon monoxide emissions subtraction process is executed. In the carbon monoxide emissions subtraction process, the emissions of carbon monoxide contained in the exhaust gas of the cupola are calculated and subtracted from the carbon dioxide emissions calculated in step S14. The data processing unit 12a of the system control unit 12 extracts the numerical data of the exhaust gas flow rate, temperature, and carbon monoxide concentration stored in the exhaust gas database 23 for the period (time) input in step S11. Then, the data calculation unit 12b of the system control unit 12 calculates the carbon monoxide emissions during the period based on the following formula. Therefore, the data calculation unit 12b corresponds to the carbon monoxide emissions calculation means.

[0039] In the following formula, let the exhaust gas flow rate be V, the temperature be T, and the exhaust gas passage duct area be A. The flow rate V, temperature T, and carbon monoxide concentration are the average values during the period, and the exhaust gas passage duct area A is given in advance as the design value of the equipment. (1) Exhaust gas volume = A × V × 273.15 / (273.15 + T) × time (2) CO density = 28 / (22.41 × (273.15 + T) / 273.15) (3) CO emissions = carbon monoxide concentration × exhaust gas volume × CO density

[0040] After that, the data calculation unit 12b subtracts the calculated carbon monoxide emissions from the carbon dioxide emissions calculated in step S14. As a result, a more accurate pure carbon dioxide emissions amount excluding the carbon monoxide component contained in the exhaust gas is calculated. Therefore, the data calculation unit 12b corresponds to the pure carbon dioxide emissions calculation means. The pure carbon dioxide emissions amount excluding the carbon monoxide emissions is displayed on the information display unit 16 in the subsequent step S16.

[0041] According to the carbon dioxide emissions calculation system 10, the carbon dioxide emissions calculation program 19, and the carbon dioxide emissions calculation method of the present embodiment described above, the following operational effects can be obtained.

[0042] (1) Calculate the amount of carbon dioxide emissions discharged from the cupola by subtracting the amount of carbon contained in the discharged substances within a set predetermined time from the amount of carbon contained in the charged materials input within that time. Therefore, the amount of discharged carbon does not include the carbon components absorbed by the molten metal. Since the amount of discharged carbon is converted to the amount of carbon dioxide emissions, the amount of carbon dioxide emissions reflecting the actual state of carbon absorption into the molten metal can be calculated.

[0043] (2) The weight data measured by the charged material weighing device 31, the molten metal weighing device 32, and the waste weighing device 33, and the carbon mass fraction data measured by the carbon component analyzer 34 are sent to the carbon dioxide emissions calculation device 11 through the network interface 17. These data are stored in the respective databases 21 to 23, and the stored data are used in each calculation process in the carbon dioxide emissions calculation process. Therefore, there is no need to re-enter the numerical values recorded in the work daily report, etc., and the calculation of the carbon dioxide emissions can be performed simply and efficiently.

[0044] (3) In the calculation of the charged carbon amount and the discharged carbon amount, the average value of the data accumulated so far is used as the data of the carbon mass fraction. For scrap iron, return materials, limestone, and discharged substances, there is almost no difference in the brands with different carbon mass fractions like coke. Therefore, by calculating using the average value, the charged carbon amount and the discharged carbon amount can be calculated in a consensual manner. Also, for the return materials, it is considered that the carbon mass fraction is the same as that of the molten metal. By using the data of the molten metal, the measurement of the carbon mass fraction can be omitted, and the calculation of the discharge amount can be made more efficient.

[0045] (4) Since the exhaust gas from the cupola contains not only carbon dioxide but also carbon monoxide, after the carbon dioxide emissions calculation process is executed in step S14, the carbon monoxide emissions subtraction process is executed in the subsequent step S15. As a result, a more accurate pure carbon dioxide emissions amount excluding the carbon monoxide component contained in the exhaust gas can be calculated.

[0046] As embodiments of the present invention, the present invention is not limited to the above embodiments, and may be implemented as follows, for example.

[0047] (a) As the amount of carbon input into the cupola, the carbon amount of other input materials such as added alloys may be added to the carbon amount of the combustion dust as the discharged carbon amount. Combustion dust is dust, powder, etc. recovered in the combustion chamber through which the exhaust gas of the cupola passes. For other materials such as added alloys, the weight is measured by the input material weighing device 31. The combustion dust is automatically discharged from the combustion chamber, and the weight is periodically measured by the waste weighing device 33. The carbon mass fraction is measured by sampling with a carbon component analyzer 34 in each case.

[0048] (b) Regarding the weights of the input materials and discharged substances to the cupola, instead of the measured numerical data being automatically transmitted to the carbon dioxide emission calculation device 11, the numerical values recorded in the work daily report or the like may be input at the data input unit 15.

[0049] (c) Regarding the weights of the cupola slag and the molten slag, instead of actually measuring their own weights, the data calculation unit 12b as the discharged substance weight calculation means may calculate the theoretical values by calculation based on the weights of the scrap iron and limestone. According to this, even when the weights of the cupola slag and the molten slag cannot be actually measured due to equipment problems, the weights of the cupola slag and the molten slag can be obtained.

[0050] In this calculation, the component ratio of a specific element contained in the cupola slag or the molten slag, the component ratio of the specific element in the input material, and the weight of the input material are used. For example, in the case of cupola slag containing a calcium component, calcium is set as the specific component, and the mass fraction FC1 of calcium in the discharged cupola slag, the weight Wl of limestone input within a predetermined period, and the mass fraction FC2 of calcium in the limestone are used. Then, the weight Wc of the cupola slag can be calculated by the following formula. Wc = (Wl×(FC2 / 100)) / (FC1 / 100)

[0051] In addition, for molten slag containing a zinc component, zinc is used as a specific component, and the mass fraction FC3 of calcium in the discharged molten slag, the weight Wi of the scrap iron charged within a predetermined period, and the mass fraction FC4 of zinc in the scrap iron are used. Then, the weight Wm of the molten slag can be calculated by the following formula. Wm = (Wi×(FC4 / 100)) / (FC3 / 100)

[0052] (d) Regarding the carbon mass fraction of the input materials and discharged substances to the cupola, the values shown in the literature may be used instead of the numerical data obtained by actual measurement.

[0053] (e) Since the emission amount of carbon monoxide contained in the exhaust gas from the cupola is not so large compared to the emission amount of carbon dioxide, the carbon monoxide emission amount subtraction process in step S15 may be omitted in the carbon dioxide emission amount calculation process.

Explanation of symbols

[0054] 10…Carbon dioxide emission amount calculation system, 12b…Data calculation unit (input carbon amount calculation means, discharged carbon amount calculation means, carbon dioxide emission amount calculation means, carbon monoxide emission amount calculation means, pure carbon dioxide emission amount calculation means, discharged substance weight calculation means), 17…Network interface (data collection means), 31…Input material weighing device (weighing means), 32…Molten metal weighing device (weighing means), 33…Waste weighing device (weighing means), 40…Exhaust gas measuring device (exhaust gas measuring means).

Claims

1. A carbon dioxide emission calculation system for calculating the amount of carbon dioxide emitted from a cupola, comprising: Input carbon amount calculation means for calculating the input carbon amount by multiplying the weight input within a predetermined time by the carbon mass fraction of the material for each type of input material input into the cupola; Emission carbon amount calculation means for calculating the emission carbon amount by multiplying the weight emitted within the predetermined time by the carbon mass fraction of the substance for each type of emission substance emitted from the cupola; Carbon dioxide emission amount calculation means for converting the difference carbon amount obtained by subtracting the emission carbon amount from the input carbon amount into the carbon dioxide emission amount and calculating the carbon dioxide emission amount; A carbon dioxide emission calculation system comprising the above.

2. Weighing means for measuring the weight input or emitted for each type of the input material and the emission substance; Carbon component analysis means for analyzing the mass fraction of carbon contained in each type of the input material and the emission substance; Data collection means for collecting the weight data measured by the weighing means and the carbon mass fraction data measured by the carbon component analysis means; Comprising: The input carbon amount calculation means calculates the input carbon amount based on the weight data and the carbon mass fraction data of the input material; The carbon dioxide emission calculation system according to claim 1, wherein the emission carbon amount calculation means calculates the emission carbon amount based on the weight data and the carbon mass fraction data of the emission substance.

3. The input material includes scrap iron, return material, and limestone; The input carbon amount calculation means calculates the input carbon amount using the average value of the respective data collected in the past as the carbon mass fraction data of the scrap iron and the limestone, and calculates the input carbon amount using the average value of the carbon mass fraction data of the molten metal collected in the past as the carbon mass fraction data of the return material; The carbon dioxide emission calculation system according to claim 1, wherein the emission carbon amount calculation means calculates the emission carbon amount using the average value of the numerical data collected in the past as the carbon mass fraction of the emission substance.

4. The weight of the emission substance is provided with emission substance weight calculation means for calculating the weight emitted within the predetermined time based on the mass fraction of a specific component contained in the emission substance, the mass fraction of the specific component in the input material containing the specific component, and the weight input within the predetermined time. The carbon emission calculation means calculates the carbon emission using the weight value calculated by the emission substance weight calculation means. The carbon dioxide emission calculation system according to claim 1.

5. Exhaust gas measurement means for measuring the flow rate, temperature, and carbon monoxide concentration of the exhaust gas discharged from the cupola, respectively, Carbon monoxide emission calculation means for calculating the carbon monoxide emission contained in the exhaust gas discharged within the predetermined time based on the flow rate, the temperature, and the carbon monoxide concentration of the exhaust gas, Net carbon dioxide emission calculation means for subtracting the carbon monoxide emission from the carbon dioxide emission to calculate the net carbon dioxide emission, The carbon dioxide emission calculation system according to claim 1, comprising:

6. A carbon dioxide emission calculation program for calculating the carbon dioxide emission discharged from the cupola, A step of calculating the input carbon amount by multiplying the weight input within a predetermined time by the carbon mass fraction of the material for each type of material input into the cupola, A step of calculating the discharged carbon amount by multiplying the weight discharged within the predetermined time by the carbon mass fraction of the substance for each type of substance discharged from the cupola, A step of converting the difference carbon amount obtained by subtracting the discharged carbon amount from the input carbon amount into a carbon dioxide emission amount and calculating the carbon dioxide emission amount, A carbon dioxide emission calculation program for executing the above steps.

7. A carbon dioxide emission calculation method for calculating the carbon dioxide emission discharged from the cupola, An input carbon amount calculation step of calculating the input carbon amount by multiplying the weight input within a predetermined time by the carbon mass fraction of the material for each type of material input into the cupola, A discharged carbon amount calculation step of calculating the discharged carbon amount by multiplying the weight discharged within the predetermined time by the carbon mass fraction of the substance for each type of substance discharged from the cupola, A carbon dioxide emission calculation step of converting the difference carbon amount obtained by subtracting the discharged carbon amount from the input carbon amount into a carbon dioxide emission amount and calculating the carbon dioxide emission amount, A carbon dioxide emission calculation method comprising the above steps.

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