Carbon emission metering method and device for pyrometallurgical multi-output product system of pentlandite

Abstract

A carbon emission metering method for a sulfur nickel ore pyrometallurgical multi-output product system is provided, comprising the following steps: S1, metering the total CO2 emission Etotal of the sulfur nickel ore pyrometallurgical smelting process according to a smelting process inventory; S2, dividing the typical consumption forms of energy input in the smelting process into water evaporation, chemical reaction heat, metal product sensible heat, gas emission sensible heat, slag sensible heat, and production process dissipation; S3, determining the metering coefficients of the metal nickel product Ni3S2 of the sulfur nickel ore pyrometallurgical smelting on water evaporation, chemical reaction heat, metal product sensible heat, gas emission sensible heat, slag sensible heat, and production process dissipation, respectively; S4, determining the total metering coefficient ftotal of the metal nickel product Ni3S2 of the sulfur nickel ore pyrometallurgical smelting; and S5, multiplying the total metering coefficient ftotal of the metal nickel product Ni3S2 of the sulfur nickel ore pyrometallurgical smelting and Etotal to obtain the carbon emission of the metal nickel product Ni3S2.

Description

Technical Field

[0001] This invention relates to the field of carbon emission measurement, and in particular to a method and apparatus for measuring carbon emissions in a multi-output product system of pyrometallurgical nickel ore. Background Technology

[0002] Traditional linear industries, involving only unidirectional input and output, are relatively easy to measure (emissions). However, complex mineral smelting processes, including the smelting of nickel and copper, involve the coordinated processing of multiple product systems with physical connections. This necessitates measuring the carbon emissions and energy consumption generated within these processes based on physical principles across different output products. However, due to a lack of specific and feasible measurement methods, the multi-output product system of pyrometallurgical nickel ore processing has not yet been adequately measured; typically, only simple physical measurement of carbon emissions is considered. But the physical connection between energy consumption and metal products in metallurgical systems depends on the form of energy consumption—waste—and carbon emissions are closely related to energy consumption.

[0003] Therefore, it is necessary to study a carbon emission measurement method and device for a multi-output product system of pyrometallurgical nickel ore to solve one or more of the above-mentioned technical problems. Summary of the Invention

[0004] To address at least one of the aforementioned technical problems, according to one aspect of the present invention, a method for measuring carbon emissions in a multi-output product system of pyrometallurgical nickel ore is provided, characterized by comprising the following steps:

[0005] S1 measures the total CO2 emissions from the pyrometallurgical smelting process of nickel ore according to the smelting process inventory. total ;

[0006] E total =∑ i (E e&h +E pro +E fu )

[0007] In the formula, E total Ee&h represents CO2 emissions (t), where Ee is the CO2 emissions (t) corresponding to net purchased electricity and heat. pro E represents emissions (t) from industrial production processes. fu Emissions from fossil fuel combustion (t);

[0008] S2 categorizes typical energy consumption forms in the smelting process into moisture evaporation (EAW), chemical reaction heat (EAC), sensible heat of metal products (SHM), sensible heat of gaseous emissions (SHEG), sensible heat of slag (SHS), and dissipation in the production process (ED).

[0009] S3 determines the stoichiometric coefficients f for the nickel product Ni3S2 produced by the pyrometallurgical smelting of nickel ore, specifically for moisture evaporation (EAW), heat of chemical reaction (EAC), sensible heat of the metallic product (SHM), sensible heat of gaseous emissions (SHEG), sensible heat of slag (SHS), and dissipation during the production process (ED). EAW f EAC f SHM f SHEG f SHS f ED ;

[0010] in,

[0011]

[0012] M A M represents the mass of the nickel product Ni3S2. B The mass of the copper product Cu2S;

[0013]

[0014] Among them, AC A AC is the first stoichiometric coefficient related to the nickel product Ni3S2 and is equal to the specific heat capacity of the nickel product Ni3S2. B M is the first stoichiometric coefficient related to the copper product Cu₂S and is equal to the specific heat capacity of the copper product Cu₂S; A M represents the mass of the nickel product Ni3S2. B The mass of the copper product Cu2S;

[0015]

[0016] Among them, AC1 A AC1 is the second stoichiometric coefficient related to the nickel product Ni3S2. B M is the second stoichiometric coefficient related to the copper product Cu₂S; A M represents the mass of the nickel product Ni3S2. B The mass of the copper product Cu2S;

[0017]

[0018]

[0019] Among them, Q A The heat of chemical reaction related to the nickel product Ni3S2, Q B For the heat of chemical reaction related to the copper product Cu2S, AM A AM represents the molecular weight of the nickel product Ni3S2. B V represents the molecular weight of Cu₂S, a product of metallic copper.A V is the stoichiometric coefficient of the nickel product Ni3S2 in the reaction. B The stoichiometric coefficient of the copper product Cu₂S in the reaction;

[0020]

[0021]

[0022]

[0023] Among them, AC2 A AC2 is the third stoichiometric coefficient related to the nickel product Ni3S2. B RS is the third stoichiometric coefficient related to the copper product Cu2S. A RS represents the release rate of sulfur from nickel before and after the reaction. B AM represents the release rate of copper from sulfur before and after the reaction. A AM represents the molecular weight of the nickel product Ni3S2. B The molecular weight of Cu₂S, a product of metallic copper, is N. A N represents the number of moles of nickel contained in a unit mole of the metallic product Ni3S2. B M represents the number of moles of copper metal contained in a unit mole of the metallic product Cu₂S. A M represents the mass of the nickel product Ni3S2. B The mass of the copper product Cu2S;

[0024] S4 determines the total stoichiometric coefficient f of Ni3S2, the nickel product from the pyrometallurgical smelting of nickel-sulfur ore. total ;

[0025] f total =(E SHM *f SHM +E EAC *f EAC +E SHEG *f SHEG +E EAW *f EAW +E SHS *f SHS +E ED *f ED )

[0026] Among them, the proportion of each energy consumption to the total energy consumption of the sulfur-nickel pyrometallurgical process E ED E EAW E SHS E EAC E SHEG E SHM Determined according to the heavy non-ferrous metal smelting design manual;

[0027] S5 represents the total stoichiometric coefficient f of Ni3S2, the nickel product obtained by pyrometallurgical smelting of nickel pyrite. total and E total The carbon emissions of the nickel product Ni3S2 are obtained by multiplication.

[0028] According to another aspect of the present invention, the energy consumption ratio E of each component to the total energy consumption of the sulfur-nickel pyrometallurgical process is found in the heavy non-ferrous metal smelting design manual. ED =10%; E EAW =1%; E SHS =28%; E EAC =7%, E SHEG =43%; E SHM =11%.

[0029] According to another aspect of the present invention, the carbon emissions of the copper product Cu2S are E total -f total *E total .

[0030] This invention can achieve one or more of the following technical effects:

[0031] 1. Compared with the carbon emissions that only consider simple physical measurement in the prior art, the present invention links the carbon emissions of the nickel product Ni3S2 with the various energy consumption forms of the metal products during the smelting process, which more realistically reflects the carbon emissions caused by various energy consumption forms and improves the accuracy of measurement. Attached Figure Description

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0033] Figure 1 This is an example of the basic product information and primary process carbon emission data of the current production batch obtained by the carbon emission metering method for a multi-output product system of nickel-sulfur ore pyrometallurgical process according to a preferred embodiment of the present invention.

[0034] Figure 2 for Figure 1 The energy consumption forms and classifications involved in the pyrometallurgical process for medium-sulfur nickel ore. Detailed Implementation

[0035] The preferred embodiments of the present invention will now be described with reference to the accompanying drawings. These specific embodiments are intended to illustrate the present invention in detail, but should not be construed as limiting the present invention. Various modifications and variations can be made without departing from the spirit and scope of the present invention, and all of these should be included within the protection scope of the present invention.

[0036] Example 1

[0037] According to a preferred embodiment of the present invention, see Figure 1-2 A method for measuring carbon emissions from a multi-output product system of pyrometallurgical nickel ore is provided, characterized by the following steps:

[0038] S1 measures the total CO2 emissions from the pyrometallurgical smelting process of nickel ore according to the smelting process inventory. total ;

[0039] S2 categorizes typical energy consumption forms in the smelting process into moisture evaporation (EAW), chemical reaction heat (EAC), sensible heat of metal products (SHM), sensible heat of gaseous emissions (SHEG), sensible heat of slag (SHS), and dissipation in the production process (ED).

[0040] S3 determines the stoichiometric coefficients f for the nickel product Ni3S2 produced by the pyrometallurgical smelting of nickel ore, specifically for moisture evaporation (EAW), heat of chemical reaction (EAC), sensible heat of the metallic product (SHM), sensible heat of gaseous emissions (SHEG), sensible heat of slag (SHS), and dissipation during the production process (ED). EAW f EAC f SHM f SHEG f SHS f ED ;

[0041] S4 determines the total stoichiometric coefficient f of Ni3S2, the nickel product from the pyrometallurgical smelting of nickel-sulfur ore. total ;

[0042] f total =(E SHM *f SHM +E EAC *f EAC +E SHEG *f SHEG +E EAW *f EAW +E SHS *f SHS +E ED *f ED )

[0043] Among them, the proportion of each energy consumption to the total energy consumption of the sulfur-nickel pyrometallurgical process E ED E EAW E SHS E EAC E SHEG E SHM Determined according to the heavy non-ferrous metal smelting design manual;

[0044] S5 represents the total stoichiometric coefficient f of Ni3S2, the nickel product obtained by pyrometallurgical smelting of nickel pyrite. total and E total The carbon emissions of the nickel product Ni3S2 are obtained by multiplication.

[0045] According to a preferred embodiment of the present invention, see Figure 1-2 Furthermore, a method for measuring carbon emissions from a multi-output product system using pyrometallurgical nickel ore processing is provided, characterized by the following steps:

[0046] S1 measures the total CO2 emissions from the pyrometallurgical smelting process of nickel ore according to the smelting process inventory. total ;

[0047] E total =∑ i (E e&h +E pro +E fu )

[0048] In the formula, E total Ee&h represents CO2 emissions (t), where Ee is the CO2 emissions (t) corresponding to net purchased electricity and heat. pro E represents emissions (t) from industrial production processes. fu Emissions from fossil fuel combustion (t);

[0049] S2 categorizes typical energy consumption forms in the smelting process into moisture evaporation (EAW), chemical reaction heat (EAC), sensible heat of metal products (SHM), sensible heat of gaseous emissions (SHEG), sensible heat of slag (SHS), and dissipation in the production process (ED).

[0050] S3 determines the stoichiometric coefficients f for the nickel product Ni3S2 produced by the pyrometallurgical smelting of nickel ore, specifically for moisture evaporation (EAW), heat of chemical reaction (EAC), sensible heat of the metallic product (SHM), sensible heat of gaseous emissions (SHEG), sensible heat of slag (SHS), and dissipation during the production process (ED). EAW f EAC f SHM f SHEG f SHS f ED ;

[0051] in,

[0052]

[0053] M A M represents the mass of the nickel product Ni3S2. B The mass of the copper product Cu2S;

[0054]

[0055] Among them, AC A AC is the first stoichiometric coefficient related to the nickel product Ni3S2 and is equal to the specific heat capacity of the nickel product Ni3S2. BM is the first stoichiometric coefficient related to the copper product Cu₂S and is equal to the specific heat capacity of the copper product Cu₂S; A M represents the mass of the nickel product Ni3S2. B The mass of the copper product Cu2S;

[0056]

[0057] Among them, AC1 A AC1 is the second stoichiometric coefficient related to the nickel product Ni3S2. B M is the second stoichiometric coefficient related to the copper product Cu₂S; A M represents the mass of the nickel product Ni3S2. B The mass of the copper product Cu2S;

[0058]

[0059]

[0060] Among them, Q A The heat of chemical reaction related to the nickel product Ni3S2, Q B For the heat of chemical reaction related to the copper product Cu2S, AM A AM represents the molecular weight of the nickel product Ni3S2. B V represents the molecular weight of Cu₂S, a product of metallic copper. A V is the stoichiometric coefficient of the nickel product Ni3S2 in the reaction. B The stoichiometric coefficient of the copper product Cu₂S in the reaction;

[0061]

[0062]

[0063]

[0064] Among them, AC2 A AC2 is the third stoichiometric coefficient related to the nickel product Ni3S2. B RS is the third stoichiometric coefficient related to the copper product Cu2S. A RS represents the release rate of sulfur from nickel before and after the reaction. B AM represents the release rate of copper from sulfur before and after the reaction. A AM represents the molecular weight of the nickel product Ni3S2. B The molecular weight of Cu₂S, a product of metallic copper, is N. A N represents the number of moles of nickel contained in a unit mole of the metallic product Ni3S2. BM represents the number of moles of copper metal contained in a unit mole of the metallic product Cu₂S. A M represents the mass of the nickel product Ni3S2. B The mass of the copper product Cu2S;

[0065] S4 determines the total stoichiometric coefficient f of Ni3S2, the nickel product from the pyrometallurgical smelting of nickel-sulfur ore. total ;

[0066] f total =(E SHM *f SHM +E EAC *f EAC +E SHEG *f SHEG +E EAW *f EAW +E SHS *f SHS +E ED *f ED )

[0067] Among them, the proportion of each energy consumption to the total energy consumption of the sulfur-nickel pyrometallurgical process E ED E EAW E SHS E EAC E SHEG E SHM Determined according to the heavy non-ferrous metal smelting design manual;

[0068] S5 represents the total stoichiometric coefficient f of Ni3S2, the nickel product obtained by pyrometallurgical smelting of nickel pyrite. total and E total The carbon emissions of the nickel product Ni3S2 are obtained by multiplication.

[0069] According to another preferred embodiment of the present invention, the energy consumption ratio E of each component to the total energy consumption of the sulfur-nickel pyrometallurgical process is found in the heavy non-ferrous metal smelting design manual. ED =10%; E EAW =1%; E SHS =28%; E EAC =7%, E SHEG =43%; E SHM =11%.

[0070] According to another preferred embodiment of the present invention, the carbon emission of the copper product Cu2S is E total -f total *E total .

[0071] According to another preferred embodiment of the present invention, in the pyrometallurgical smelting of nickel sulfide ore, collecting Figure 1The data is collected and uploaded into the system to obtain basic product information and raw process carbon emission data for the current production batch.

[0072] This study analyzes the energy consumption forms in the pyrometallurgical smelting of nickel-sulfur ore to reflect the physicochemical characteristics of the metallurgical process. Specifically, typical energy consumption forms are categorized into water evaporation (EAW), heat of chemical reaction (EAC), sensible heat of metallic products (SHM), sensible heat of gaseous emissions (SHEG), sensible heat of slag (SHS), and energy dissipation (ED) during the production process.

[0073] Depending on whether the magnitude of a certain form of energy consumption depends solely on the total output of the product, or on both the total output of the product and the product's output ratio (M... A +M B The above-mentioned different forms of energy consumption can be divided into the following two main categories:

[0074] • Product-ratio dependent categories of energy consumption (PRDE)

[0075] • Product-ratio independent categories of energy consumption (PRIE)

[0076] like Figure 2 As shown, the energy consumption forms involved and their affiliation with the above classifications fall into three categories: 1. They belong to PRDE in all processes; 2. They belong to PRIE in all processes; 3. They belong to PRDE in some processes and PRIE in others. SHM belongs to the first category (PRDE in all processes). For a stable production process, different metal raw materials and metal products are at fixed temperatures at both the inlet and outlet of the process. Since the specific heat capacity of various metal products is not the same, the amount of sensible heat absorbed during the production process is also different. When the product output ratio of the process changes, the amount of energy consumed in the form of SHM will also change accordingly.

[0077] ED, SHS, and EAW belong to the second category. Among them, the magnitude of ED depends on parameters such as the equipment's operating time, internal and external temperature difference, and thermal conductivity; the correlation between the energy consumption of the above three forms and the product output ratio can be ignored.

[0078] EAC and SHEG belong to the third category, and their correlation with the product output ratio is highly dependent on the physicochemical process of the metal products in the metallurgical process. In general, when the metal products participate in the chemical reaction of the process, they can be classified as PRDE, and when the metal products do not participate in the chemical reaction of the process, they should be classified as PRIE.

[0079] According to another preferred embodiment of the present invention, the stoichiometric coefficients f of the nickel product Ni3S2 smelted from nickel pyrometallurgical ore are determined for water evaporation (EAW), heat of chemical reaction (EAC), sensible heat of metal product (SHM), sensible heat of gaseous emissions (SHEG), sensible heat of slag (SHS), and dissipation in the production process (ED). EAW f EAC f SHM f SHEG f SHS f ED .

[0080] The output quantities of the two metal products are M respectively A With M B (kg)(with M) A Take 0.69 kg, M B Taking 0.31kg as an example), the specific heat capacities are respectively c A With c B (MJ / ℃*kg). In this patent, A represents the nickel product; B represents the copper product. The main forms of nickel and copper in the low-nickel matte product of the smelting process are Ni3S2 and Cu2S, with specific heat capacities of 0.8 J / K*g(cNi3S2) and 0.5 J / K*g(cCu2S), respectively.

[0081]

[0082] M A M represents the mass of the nickel product Ni3S2. B The mass of the copper product Cu2S;

[0083]

[0084] Among them, AC A AC is the first stoichiometric coefficient related to the nickel product Ni3S2 and is equal to the specific heat capacity of the nickel product Ni3S2. B M is the first stoichiometric coefficient related to the copper product Cu₂S and is equal to the specific heat capacity of the copper product Cu₂S; A M represents the mass of the nickel product Ni3S2. B The mass of the copper product Cu2S.

[0085] More specifically, for example, AC ATake 0.8 J / K*g, AC B Take 0.5 J / K*g, M A Take 0.69 kg, M B Take 0.31 kg, and calculate f of the metallic nickel product according to the formula. SHM (=0.8M A ÷(0.8M A +0.5M B The figure is 78%.

[0086] Preferably,

[0087]

[0088] Among them, AC1 A AC1 is the second stoichiometric coefficient related to the nickel product Ni3S2. B M is the second stoichiometric coefficient related to the copper product Cu₂S; A M represents the mass of the nickel product Ni3S2. B The mass of the copper product Cu2S;

[0089]

[0090]

[0091] Among them, Q A The heat of chemical reaction related to the nickel product Ni3S2, Q B For the heat of chemical reaction related to the copper product Cu2S, AM A AM represents the molecular weight of the nickel product Ni3S2. B V represents the molecular weight of Cu₂S, a product of metallic copper. A V is the stoichiometric coefficient of the nickel product Ni3S2 in the reaction. B is the stoichiometric coefficient of the copper product Cu2S in the reaction.

[0092] More specifically, M A Take 0.69 kg, M B Take 0.31 kg.

[0093] Q A =195kJ / mol

[0094] Q B =167kJ / mol

[0095] AM A =241kg / mol

[0096] AM B =160kg / mol

[0097] V A =2

[0098] V B =1

[0099] Based on the above parameters, AC1 is calculated. A =195÷(241*2)=0.404,AC1 B =167÷(160*1)=1.04, f of the nickel product EAC =0.404M A ÷(0.404M A +1.04M B ) = 46%

[0100] Preferably,

[0101]

[0102]

[0103]

[0104] Among them, AC2 A AC2 is the third stoichiometric coefficient related to the nickel product Ni3S2. B RS is the third stoichiometric coefficient related to the copper product Cu2S. A RS represents the release rate of sulfur from nickel before and after the reaction. B AM represents the release rate of copper from sulfur before and after the reaction. A AM represents the molecular weight of the nickel product Ni3S2. B The molecular weight of Cu₂S, a product of metallic copper, is N. A N represents the number of moles of nickel contained in a unit mole of the metallic product Ni3S2. B M represents the number of moles of copper metal contained in a unit mole of the metallic product Cu₂S. A M represents the mass of the nickel product Ni3S2. B The mass of the copper product Cu2S.

[0105] Preferably, the parameter RS ​​can be determined based on the change in the chemical form of nickel and copper elements before and after smelting: as shown in the formula, before and after the reaction, the chemical form of nickel changes from nickel pyrite to nickel trisulfide, while the chemical form of copper changes from chalcopyrite to cuprous sulfide. The calculated RS values ​​for nickel and copper elements are 2 / 9 (RS... A ) and 1 / 2 (RS) B ).

[0106] More specifically, M ATake 0.69 kg, M B Take 0.31 kg.

[0107] RS A :2 / 9

[0108] RS B :1 / 2

[0109] AM A =241kg / mol

[0110] AM B =160kg / mol

[0111] N A =3mol / mol

[0112] N B =2mol / mol

[0113] Based on the above parameters, AC2 is calculated. A =3*2 / 9÷241=0.00276, AC2 A =2*1 / 2÷160=0.00625, f of the nickel product SHEG =0.00276M A ÷(0.00276M A +0.0625M B The figure is 49%.

[0114] According to the heavy non-ferrous metal smelting design manual, the energy consumption ratio (E) of each type of energy consumption to the total energy consumption of sulfur-nickel pyrometallurgical processes can be found. ED =10%; E EAW =1%; E SHS =28%; E EAC =7%, E SHEG =43%; E SHM =11%. Determine the overall stoichiometric coefficient f for Ni3S2, the nickel product from the pyrometallurgical smelting of nickel ore. total ;

[0115] f total =(E SHM *f SHM +E EAC *f EAC +E SHEG *f SHEG +E EAW *f EAW +E SHS *f SHS +E ED *f ED )

[0116] f total=11%*78%+7%*46%+43%*49%+69%*(10%+1%+28%)=59.8% (metallic nickel product).

[0117] In comparison, the stoichiometric coefficient for nickel products determined by mass measurement methods in the prior art is 69%, while in this patent, f total =59.8% (Ni3S2 metallic product). The carbon emissions of this Ni3S2 metallic product are related to various energy consumption forms during the smelting process, more realistically reflecting the carbon emissions caused by various energy consumption forms. Finally, for example, using Simapro to calculate the total carbon emissions E of 1 kg of pyrometallurgical nickel sulfate... total Taking 2.65 kg CO2eq as an example, the carbon emissions of the nickel metal products are 1.58 kg and 1.83 kg respectively, according to the mass measurement method in this patent and the prior art.

[0118] Example 2

[0119] According to a preferred embodiment of the present invention, see Figure 1-2 Furthermore, a carbon emission metering system for a multi-output product system from a pyrometallurgical process for nickel ore is provided, characterized by comprising:

[0120] The first module is used to measure the total CO2 emissions E from the pyrometallurgical smelting process of nickel ore based on the smelting process inventory. total ;

[0121] E total =∑ i (E e&h +E pro +E fu )

[0122] In the formula, E total Ee&h represents CO2 emissions (t), where Ee is the CO2 emissions (t) corresponding to net purchased electricity and heat. pro E represents emissions (t) from industrial production processes. fu Emissions from fossil fuel combustion (t);

[0123] The second module is used to classify the typical forms of energy consumption in the smelting process into water evaporation (EAW), chemical reaction heat (EAC), sensible heat of metal products (SHM), sensible heat of gaseous emissions (SHEG), sensible heat of slag (SHS), and dissipation of energy in the production process (ED).

[0124] The third module is used to determine the stoichiometric coefficients f of the nickel product Ni3S2 produced by the pyrometallurgical smelting of nickel ore in terms of water evaporation (EAW), heat of chemical reaction (EAC), sensible heat of metallic product (SHM), sensible heat of gaseous emissions (SHEG), sensible heat of slag (SHS), and dissipation in the production process (ED). EAW f EACf SHM f SHEG f SHS f ED ;

[0125] in,

[0126]

[0127] M A M represents the mass of the nickel product Ni3S2. B The mass of the copper product Cu2S;

[0128]

[0129] Among them, AC A AC is the first stoichiometric coefficient related to the nickel product Ni3S2 and is equal to the specific heat capacity of the nickel product Ni3S2. B M is the first stoichiometric coefficient related to the copper product Cu₂S and is equal to the specific heat capacity of the copper product Cu₂S; A M represents the mass of the nickel product Ni3S2. B The mass of the copper product Cu2S;

[0130]

[0131] Among them, AC1 A AC1 is the second stoichiometric coefficient related to the nickel product Ni3S2. B M is the second stoichiometric coefficient related to the copper product Cu₂S; A M represents the mass of the nickel product Ni3S2. B The mass of the copper product Cu2S;

[0132]

[0133]

[0134] Among them, Q A The heat of chemical reaction related to the nickel product Ni3S2, Q B For the heat of chemical reaction related to the copper product Cu2S, AM A AM represents the molecular weight of the nickel product Ni3S2. B V represents the molecular weight of Cu₂S, a product of metallic copper. A V is the stoichiometric coefficient of the nickel product Ni3S2 in the reaction. B The stoichiometric coefficient of the copper product Cu₂S in the reaction;

[0135]

[0136]

[0137]

[0138] Among them, AC2 A AC2 is the third stoichiometric coefficient related to the nickel product Ni3S2. B RS is the third stoichiometric coefficient related to the copper product Cu2S. A RS represents the release rate of sulfur from nickel before and after the reaction. B AM represents the release rate of copper from sulfur before and after the reaction. A AM represents the molecular weight of the nickel product Ni3S2. B The molecular weight of Cu₂S, a product of metallic copper, is N. A N represents the number of moles of nickel contained in a unit mole of the metallic product Ni3S2. B M represents the number of moles of copper metal contained in a unit mole of the metallic product Cu₂S. A M represents the mass of the nickel product Ni3S2. B The mass of the copper product Cu2S;

[0139] The fourth module is used to determine the total stoichiometric coefficient f of Ni3S2, the nickel product from the pyrometallurgical smelting of nickel ore. total ;

[0140] f total =(E SHM *f SHM +E EAC *f EAC +E SHEG *f SHEG +E EAW *f EAW +E SHS *f SHS +E ED *f ED )

[0141] Among them, the proportion of each energy consumption to the total energy consumption of the sulfur-nickel pyrometallurgical process E ED E EAW E SHS E EAC E SHEG E SHM Determined according to the heavy non-ferrous metal smelting design manual;

[0142] The fifth module contains the total stoichiometric coefficient f for the nickel product Ni3S2 obtained by pyrometallurgical smelting of nickel ore. total and E total The carbon emissions of the nickel product Ni3S2 are obtained by multiplication.

[0143] According to another preferred embodiment of the present invention, the present invention also provides a computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program adapted to be loaded and executed by a processor, so as to cause a computer device having the processor to perform the aforementioned carbon emission measurement method for a multi-output product system of nickel-sulfur ore pyrometallurgical process.

[0144] This invention also provides a computer device, characterized in that it includes: a processor and a memory; the processor is connected to the memory, wherein the memory is used to store a computer program, and the processor is used to invoke the computer program to cause the computer device to execute the steps of the aforementioned carbon emission measurement method for a multi-output product system using a pyrometallurgical process for nickel ore. It is worth noting that the process by which the processor of this invention executes the computer program is consistent with the execution process of each step in the carbon emission measurement method for a multi-output product system using a pyrometallurgical process for nickel ore provided by this invention, as detailed in the foregoing description.

[0145] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as ROM / RAM, disk, optical disk, etc.

[0146] This invention can achieve one or more of the following technical effects:

[0147] 1. Compared with the carbon emissions that only consider simple physical measurement in the prior art, the present invention links the carbon emissions of the nickel product Ni3S2 with the various energy consumption forms of the metal products during the smelting process, which more realistically reflects the carbon emissions caused by various energy consumption forms and improves the accuracy of measurement.

[0148] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A method for measuring carbon emissions in a multi-output product system of pyrometallurgical nickel ore, characterized in that... Includes the following steps: S1 measures the total CO2 emissions from the pyrometallurgical smelting process of nickel ore according to the smelting process inventory. total ; AND total =∑ i (AND e&h +E pro +E fu ) In the formula, E total E represents CO2 emissions. e&h E represents the CO2 emissions corresponding to net purchased electricity and heat. pro E represents emissions from industrial production processes. fu Emissions from the combustion of fossil fuels; S2 categorizes typical energy consumption forms in the smelting process into moisture evaporation (EAW), chemical reaction heat (EAC), sensible heat of metal products (SHM), sensible heat of gaseous emissions (SHEG), sensible heat of slag (SHS), and dissipation in the production process (ED). S3. Determine the stoichiometric coefficients f of the nickel product Ni3S2 from the pyrometallurgical smelting of nickel ore in terms of water evaporation (EAW), heat of chemical reaction (EAC), sensible heat of metallic product (SHM), sensible heat of gaseous emissions (SHEG), sensible heat of slag (SHS), and dissipation (ED) in the production process. EAW f EAC f SHM f SHEG f SHS f ED ; in, f EAW =f SHM =f ED = M A M represents the mass of the nickel product Ni3S2. B The mass of the copper product Cu2S; in, It is the first stoichiometric coefficient related to the nickel product Ni3S2 and is equal to the specific heat capacity of the nickel product Ni3S2; M is the first stoichiometric coefficient related to the copper product Cu₂S and is equal to the specific heat capacity of the copper product Cu₂S; A For the mass of the nickel product Ni3S2, M B The mass of the copper product Cu2S; in, The second stoichiometric coefficient related to the nickel product Ni3S2; M is the second stoichiometric coefficient related to the copper product Cu₂S; A M represents the mass of the nickel product Ni3S2. B The mass of the copper product Cu2S; Among them, Q A The heat of chemical reaction related to the nickel product Ni3S2, Q B For the heat of chemical reaction related to the copper product Cu2S, AM A AM represents the molecular weight of the nickel product Ni3S2. B V represents the molecular weight of Cu₂S, a product of metallic copper. A V is the stoichiometric coefficient of the nickel product Ni3S2 in the reaction. B The stoichiometric coefficient of the copper product Cu₂S in the reaction; Among them, AC2 A This is the third stoichiometric coefficient related to the nickel product Ni3S2. The third stoichiometric coefficient related to the copper product Cu2S; RS A RS represents the release rate of sulfur from nickel before and after the reaction. B AM represents the release rate of copper from sulfur before and after the reaction. A AM represents the molecular weight of the nickel product Ni3S2. B The molecular weight of Cu₂S, a product of metallic copper, is N. A N represents the number of moles of nickel contained in a unit mole of the metallic product Ni3S2. B M represents the number of moles of copper metal contained in a unit mole of the metallic product Cu₂S. A M represents the mass of the nickel product Ni3S2. B The mass of the copper product Cu2S; S4 determines the total stoichiometric coefficient f of Ni3S2, the nickel product from the pyrometallurgical smelting of nickel-sulfur ore. total ; Among them, the proportion of each energy consumption to the total energy consumption of the sulfur-nickel pyrometallurgical process E ED E EAW E SHS E EAC E SHEG E SHM Determined according to the heavy non-ferrous metal smelting design manual; S5 represents the total stoichiometric coefficient f of Ni3S2, the nickel product obtained by pyrometallurgical smelting of nickel pyrite. total and E total The carbon emissions of the nickel product Ni3S2 are obtained by multiplication.

2. The carbon emission measurement method for a multi-output product system of pyrometallurgical nickel ore processing according to claim 1, characterized in that... According to the heavy non-ferrous metal smelting design manual, the energy consumption ratio (E) of each type of energy consumption to the total energy consumption of sulfur-nickel pyrometallurgical processes can be found. ED =10%, E EAW =1%, E SHS =28%, E EAC =7%, E SHEG =43%, E SHM =11%.

3. The carbon emission measurement method for a multi-output product system of pyrometallurgical nickel ore processing according to claim 1 or 2, characterized in that... The carbon emissions of Cu2S, a product of metallic copper, are E total -f total *E total .

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