CN113868851A - Method for establishing comprehensive evaluation model of solid fuel for sintering and application - Google Patents

Method for establishing comprehensive evaluation model of solid fuel for sintering and application Download PDF

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CN113868851A
CN113868851A CN202111097072.9A CN202111097072A CN113868851A CN 113868851 A CN113868851 A CN 113868851A CN 202111097072 A CN202111097072 A CN 202111097072A CN 113868851 A CN113868851 A CN 113868851A
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左海滨
袁亚强
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University of Science and Technology Beijing USTB
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Abstract

The invention provides a method for establishing a comprehensive evaluation model of solid fuel for sintering and application thereof. Which comprises the following steps: s1, the comprehensive evaluation model of the solid fuel for sintering considers the mixed combustion reaction behavior of different types of solid fuels under a heat insulation system based on the energy balance principle, and is mainly established on three main indexes of theoretical combustion temperature, harmful gas emission index and use cost index; s2, establishing a fuel evaluation characteristic value K based on meeting the production requirement based on the three main indexes; and S3, calculating fuel evaluation characteristic values K of the solid fuel batching schemes of the preset types and the preset proportioning through the comprehensive evaluation model, and comparing and analyzing the K values to quantitatively evaluate the advantages and disadvantages of different fuel batching schemes. The model is convenient to calculate, has important guiding significance for selection and optimization of types and proportions of fuels produced by field sintering, and can be used for evaluation of other types of fuels for sintering for modification of corresponding indexes.

Description

Method for establishing comprehensive evaluation model of solid fuel for sintering and application
Technical Field
The invention relates to the technical field of metallurgy, in particular to a method for establishing a comprehensive evaluation model of solid fuel for sintering and application thereof.
Background
At present, with the development of the steel industry and the continuous improvement of the ratio of blast furnace clinker, the coke powder for sintering is in short supply, and biomass charcoal, semi coke, blast furnace dust or anthracite is used as a solid fuel for sintering instead of or partially in many sintering sites. However, because of the great difference in the combustion performance between the solid fuel and the coke powder, the type and the proportion of the solid fuel used in the sintering mixture have obvious influence on the sintering production cost, the smoke emission and the quality of the sintered ore.
Most researchers use a sintering cup experimental method to directly compare the effects of various solid fuels on the sintering process and the metallurgical performance, comprehensively evaluate the types and the proportions of the fuels used in the process and obtain the optimal solution. The method is not only relatively costly, but also time and labor consuming.
In recent years, some scholars have better scientificity by establishing various fuzzy mathematical models for predicting the change and the end point of a sinter bed. For example, the invention patent with the application number of CN201410205833.1 discloses a method for establishing a blast furnace injection coal cost performance evaluation model. Based on the combustion reaction behavior of the pulverized coal in the blast furnace, the concept that the pulverized coal can provide the blast furnace with effective utilization of heat value is provided. 8 indexes influencing actual heat supply of pulverized coal and 4 indexes influencing injection cost are determined, and a model for evaluating the cost performance of the blast furnace injection coal or the alternative fuel is established. For example, the invention patent with application number CN202011577155.3 discloses a sintering solid fuel conditioning method based on thermal equilibrium. And establishing an online thermal balance calculation model of the sintering machine according to the sintering mixture burdening parameters and the sintering process operation parameters collected at the current moment, and giving a reference value of the sintering solid fuel ratio. When the iron-containing raw material, the flux, the fuel or the operation parameters of the sintering process in the sintering ingredients are changed, an optimized adjustment scheme of the proportion of the sintered solid fuel is given in real time according to an online thermal balance calculation model.
However, the model or the establishing method does not consider pollutant emission and production cost in the sintering fuel combustion process, and is not suitable for being applied by enterprise purchasing departments under the condition that the current environmental protection pressure is increased day by day.
In view of the above, in order to truly reflect the actual situation of the solid fuel for sintering, the invention provides an evaluation model based on the industrial analysis, the element analysis, the combustion characteristic, the crushing characteristic and the use cost of the solid fuel, and explores a simple and easy solid fuel evaluation model for sintering. The model is convenient to calculate and has important guiding significance for optimizing the type and the proportion of the field fuel.
Disclosure of Invention
The invention aims to provide a method for establishing a comprehensive evaluation model of solid fuel for sintering and application thereof.
In order to achieve the above object, the present invention provides a method for establishing a comprehensive evaluation model of a solid fuel for sintering, comprising the steps of:
s1, the comprehensive evaluation model of the solid fuel for sintering considers the mixed combustion reaction behavior of different types of solid fuels in an adiabatic system based on the energy balance principle, and is mainly established at the theoretical combustion temperature TcHarmful gas emission index IeAnd a cost index of use WuThree main indexes;
s2, establishing a fuel evaluation characteristic value K based on meeting the production requirement based on the three main indexes;
the fuel evaluation characteristic value is theoretical combustion temperature/(harmful gas emission index multiplied by use cost index) and is dimensionless; that is to say that the first and second electrodes,
Figure BDA0003269453840000021
s3, calculating fuel evaluation characteristic values K of the solid fuel batching schemes of the preset types and the preset proportions through the comprehensive evaluation model, and comparing and analyzing the K values to quantitatively evaluate the advantages and disadvantages of different fuel batching schemes;
the larger the K value is, the better the batching scheme is, and the smaller the K value is, the worse the batching scheme is; therefore, the optimization of the selection scheme of the solid fuel for sintering is realized.
As a further improvement of the invention, in step S1, the theoretical combustion temperature TcThe method comprises the following sub-indexes: heat quantity Q of each fuel combustioniInitial temperature T0And average specific heat capacity cp；
The harmful gas emission index IeThe method comprises the following sub-indexes: fuel volatile content ViN element content NiAnd the content S of S elementi；
The cost index of use WuThe method comprises the following sub-indexes: price of entering factory WiAnd grindability index Hi；
In addition, the three main indexes in the comprehensive evaluation model of the solid fuel for sintering further comprise the following common sub-indexes: mass M of sinter mixsFuel ratio YfAnd mass ratio X of each fueli。
When the mixed ingredients are produced by sintering, solid fuel is mainly used for providing heat for the ore forming reaction between the iron ore and the flux. Therefore, the applicability of the selection type and the proportion of the fuel can be more intuitively evaluated by considering the theoretical combustion temperature of the solid fuel under the heat insulation system.
When the fuel is burnt in the sinter bed, not only the volatilization analysis reaction but also NO and SO are generated2And the like, which cause serious pollution to the atmospheric environment. The model innovatively provides the harmful gas emission index as an important index for fuel use evaluation.
As a further development of the invention, the theoretical combustion temperature TcThe calculation formula is as follows: the theoretical combustion temperature is the total calorific value of solid fuel combustion/(mass of sintering mixture-mass of sintering mixture x fuel ratio)/average specific heat capacity-initial temperature; the total heating value of solid fuel combustion is the sum of the products of each fuel combustion heating value, the quality of the sintering mixture, the fuel proportion and the mass ratio of each fuel;
that is to say that the first and second electrodes,
Figure BDA0003269453840000031
Figure BDA0003269453840000032
wherein beta is a correction factor, and an empirical value of 1.4, namely the ratio of the measured temperature of the sintering mixture to the theoretically calculated temperature, is taken; n is the total number of fuel types used; i is a corresponding fuel, i is 1, 2, … …, n.
As a further improvement of the invention, the harmful gas emission index IeThe calculation formula is as follows: the harmful gas emission index (sintered mixture quality x fuel proportioning x mass of each fuel) is x (volatile content + N element content + S element content);
that is to say that the first and second electrodes,
Figure BDA0003269453840000033
as a further development of the invention, the use cost index WuThe calculation formula is as follows: the cost index is the quality of the sintering mixture, the fuel ratio, the mass ratio of each fuel, the plant price and the grindability index;
that is to say that the first and second electrodes,
Figure BDA0003269453840000041
before being used for production, the solid fuel for sintering is divided into < 5mm by a crushing sieve and can enter a storage bin, so that the factory entering price and the grindability must be considered.
As a further development of the invention, the grindability index HiThe calculation method of (2) is as follows:
Hi＝Zi/Giti；
wherein Z isiThe weight of the crushed fuel with the grain diameter less than 5mm is kg; giKg of the mass of a certain fuel before crushing; t is tiThe time taken for crushing a certain fuel, min.
As a further improvement of the present invention, the specific calculation formula of the fuel evaluation characteristic value K is:
Figure BDA0003269453840000042
as a further improvement of the invention, in the comprehensive evaluation model of the solid fuel for sintering, the combustion heat quantity Q of each fueliThe heating value is low, and is measured and calculated according to the national standard under the condition of a dry basis; initial temperatureT0And average specific heat capacity cpAre sintering production parameters.
As a further improvement of the invention, in the comprehensive evaluation model of the solid fuel for sintering, the quality M of the sintering mixturesFuel ratio YfAnd mass ratio X of each fueliAre all sintering production parameters; fuel volatile content ViN element content NiAnd the content S of S elementiThe measurement and calculation are carried out according to the national standard under the dry base condition.
As a further improvement of the invention, the solid fuel comprises but is not limited to one or more of biomass coke, semi coke, blast furnace dust, anthracite and coke powder.
In a further improvement of the present invention, in the comprehensive evaluation model of solid fuel for sintering, the theoretical combustion temperature can be corrected according to the combustion low-level calorific value of the gas fuel such as natural gas, coke oven gas and blast furnace gas, and the theoretical combustion temperature can be corrected according to NO and SO in the combustion process of the gas fuel such as natural gas, coke oven gas and blast furnace gas2The emission index of the harmful gas is corrected according to the unit release amount of the harmful gas, and the use cost index of the harmful gas is corrected according to the storage, processing and transportation processes of the gas fuel such as natural gas, coke oven gas, blast furnace gas and the like; after index correction, the model can be directly applied to the comprehensive evaluation of various sintering fuel use schemes such as gas-gas mixing, gas-solid mixing, solid-solid mixing and the like.
As a further improvement of the invention, when the gas fuel is adopted for sintering production, the corresponding mass ratio of the gas fuel in the model can be changed into volume ratio; volatile content V corresponding to gas fueliCan be removed; and the corresponding N element content NiAnd the content S of S elementiChangeable to release NO during combustion of unit volume of gaseous fuelxAnd SO2In mg/m3Both of which are measured by a gas fuel combustion flue gas analysis experiment per unit volume.
The invention has the beneficial effects that:
1. the method for establishing the solid fuel comprehensive evaluation model for sintering provided by the invention considers the mixed combustion reaction behavior of different fuels under a heat insulation system based on the energy balance principle, provides the concept of theoretical combustion temperature of sintering raw materials, determines 3 indexes influencing pollutant emission and 2 indexes influencing production cost, and establishes the solid fuel comprehensive evaluation model for sintering. The model is convenient to calculate and has important guiding significance for selection and optimization of types and proportions of fuels produced by field sintering. Meanwhile, the method can be used for evaluating other types of sintering fuels by modifying the corresponding indexes.
2. The comprehensive evaluation model of the solid fuel for sintering provided by the invention comprehensively considers the combustion reaction process and the use cost of the fuel in sintering production, obtains the theoretical combustion temperature of a sintering mixture after the fuel is combusted through the theoretical analysis of a system, and creatively provides a calculation method of the emission index of harmful gas generated by fuel combustion by combining with the current production concerned environmental index. On the basis of this, an evaluation model using the evaluation feature value K as an index is proposed. By comparing the K value, the advantages and disadvantages of different fuel proportioning schemes can be easily obtained, and the optimal solid fuel use scheme can be obtained. The model is convenient to calculate and easy to evaluate, and has important guiding significance for the optimal selection of the solid fuel for sintering.
3. The comprehensive evaluation model for the solid fuel for sintering provided by the invention takes the harmful gas emission index as an important index of fuel use evaluation, and can effectively measure the pollution degree of different types of solid fuels for sintering production to the environment. At the initial stage of combustion reaction, most of the separated volatile matters can be attached to the surfaces of a sintering flue and a main exhaust fan, so that the service life of equipment is influenced; a small part of the smoke is discharged into the atmosphere to form fine particles, so that haze is caused. NO directly determined by N, S content in fuelxAnd SO2The amount of formation during the combustion process, which is the main cause of acid rain. Therefore, the harmful gas emission index obtained based on the three sub-indexes comprehensively reflects the degree of harm of the sintering fuel to the environment.
4. The comprehensive evaluation model of the solid fuel for sintering provided by the invention can be directly applied to comprehensive evaluation of various fuel use schemes for sintering, such as gas-gas mixing, gas-solid mixing, solid-solid mixing and the like, for modification of corresponding sub-indexes, and has a wide application range.
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Fig. 1 is a schematic flow chart of a method for establishing a comprehensive evaluation model of a solid fuel for sintering according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1, the present invention provides a method for establishing a comprehensive evaluation model of a solid fuel for sintering, including the following steps:
s1, the comprehensive evaluation model of the solid fuel for sintering considers the mixed combustion reaction behavior of different types of solid fuels in an adiabatic system based on the energy balance principle, and is mainly established at the theoretical combustion temperature TcHarmful gas emission index IeAnd a cost index of use WuThree main indexes;
s2, establishing a fuel evaluation characteristic value K based on meeting the production requirement based on the three main indexes;
the fuel evaluation characteristic value is theoretical combustion temperature/(harmful gas emission index multiplied by use cost index) and is dimensionless; that is to say that the first and second electrodes,
Figure BDA0003269453840000071
s3, calculating fuel evaluation characteristic values K of the solid fuel batching schemes of the preset types and the preset proportions through the comprehensive evaluation model, and comparing and analyzing the K values to quantitatively evaluate the advantages and disadvantages of different fuel batching schemes;
the larger the K value is, the better the batching scheme is, and the smaller the K value is, the worse the batching scheme is; therefore, the optimization of the selection scheme of the solid fuel for sintering is realized.
Preferably, in step S1, the theoretical combustion temperature TcThe method comprises the following sub-indexes: heat quantity Q of each fuel combustioniInitial temperature T0And average specific heat capacity cp；
The harmful gas emission index IeThe method comprises the following sub-indexes: fuel volatile content ViN element content NiAnd the content S of S elementi；
The cost index of use WuThe method comprises the following sub-indexes: price of entering factory WiAnd grindability index Hi；
In addition, the three main indexes in the comprehensive evaluation model of the solid fuel for sintering further comprise the following common sub-indexes: mass M of sinter mixsFuel ratio YfAnd mass ratio X of each fueli。
Preferably, the theoretical combustion temperature TcThe calculation formula is as follows: the theoretical combustion temperature is the total calorific value of solid fuel combustion/(mass of sintering mixture-mass of sintering mixture x fuel ratio)/average specific heat capacity-initial temperature; the total heating value of solid fuel combustion is the sum of the products of each fuel combustion heating value, the quality of the sintering mixture, the fuel proportion and the mass ratio of each fuel;
that is to say that the first and second electrodes,
Figure BDA0003269453840000072
Figure BDA0003269453840000073
wherein beta is a correction factor, and an empirical value of 1.4, namely the ratio of the measured temperature of the sintering mixture to the theoretically calculated temperature, is taken; n is the total number of fuel types used; i is a corresponding fuel, i is 1, 2, … …, n.
Preferably, the harmful gas emission index IeThe calculation formula is as follows: the harmful gas emission index (sintered mixture quality x fuel proportioning x mass of each fuel) is x (volatile content + N element content + S element content);
that is to say that the first and second electrodes,
Figure BDA0003269453840000081
preferably, the use cost index WuThe calculation formula is as follows: the cost index is the quality of the sintering mixture, the fuel ratio, the mass ratio of each fuel, the plant price and the grindability index;
that is to say that the first and second electrodes,
Figure BDA0003269453840000082
preferably, the grindability index HiThe calculation method of (2) is as follows:
Hi＝Zi/Giti；
wherein Z isiThe weight of the crushed fuel with the grain diameter less than 5mm is kg; giKg of the mass of a certain fuel before crushing; t is tiThe time taken for crushing a certain fuel, min.
Preferably, the specific calculation formula of the fuel evaluation characteristic value K is as follows:
Figure BDA0003269453840000083
preferably, in the comprehensive evaluation model of solid fuel for sintering, the combustion heat quantity Q of each fueliThe heating value is low, and is measured and calculated according to the national standard under the condition of a dry basis; initial temperature T0And average specific heat capacity cpAre sintering production parameters.
Preferably, in the comprehensive evaluation model of solid fuel for sintering, the quality M of sintering mixture issFuel ratio YfAnd mass ratio X of each fueliAre all sintering production parameters; fuel volatile content ViN element content NiAnd the content S of S elementiThe measurement and calculation are carried out according to the national standard under the dry base condition.
Preferably, the solid fuel includes, but is not limited to, one or more of biomass coke, semi coke, blast furnace dust, anthracite and coke powder.
The invention is further illustrated with respect to specific examples.
Example 1
The embodiment 1 of the invention provides a method for establishing a comprehensive evaluation model of solid fuel for sintering, which is used for evaluation calculation of the solid fuel for sintering, and specifically comprises the following steps:
1. the fuel industry analysis is detected according to the national standard CB212-91, and the air drying base volatile matter of the coal is obtained.
2. And (3) detecting the fuel element analysis according to the national standard GB 476-91 to obtain the N, S content of the air drying base.
3. The fuel calorific value is detected according to national standard GB213-87, and the low calorific value is calculated.
4. The theoretical combustion temperature for combustion of the fuel in the sinter mix under adiabatic conditions was calculated as follows:
Figure BDA0003269453840000091
5. the index of emission of harmful gases upon combustion of fuel is calculated as follows:
Figure BDA0003269453840000092
6. the grindability index of the fuel was calculated as follows:
Hi＝Zi/Giti；
7. the use cost index of the fuel is calculated according to the following method:
Figure BDA0003269453840000093
8. the evaluation characteristic value K in the solid fuel comprehensive evaluation model for sintering is calculated according to the following method:
Figure BDA0003269453840000094
9. the evaluation characteristic values K for the different types of fuel were calculated as shown in the following table.
TABLE 1 Performance test data for different types of fuels
Figure BDA0003269453840000101
Table 2 shows evaluation index parameters of different fuel blending schemes
Figure BDA0003269453840000102
Table 3 shows the evaluation indices of the different dosing regimens calculated according to the calculation model
Batching scheme Theoretical combustion temperature/(° c) Index of emission of harmful gas Index of use cost K
Scheme 1 1368.19 4.125 7.38 44.94
Scheme 2 1317.54 5.658 7.63 30.52
Scheme 3 1264.62 8.959 8.12 17.38
As can be seen from the calculation results in Table 3, the K value of the scheme 1 is the maximum, and the batching scheme is the optimal; the K value for case 3 is the smallest and the dosing regimen is the worst.
In conclusion, the invention provides a method for establishing a comprehensive evaluation model of solid fuel for sintering and application thereof. Which comprises the following steps: s1, the comprehensive evaluation model of the solid fuel for sintering considers the mixed combustion reaction behavior of different types of solid fuels under a heat insulation system based on the energy balance principle, and is mainly established on three main indexes of theoretical combustion temperature, harmful gas emission index and use cost index; s2, establishing a fuel evaluation characteristic value K based on meeting the production requirement based on the three main indexes; and S3, calculating fuel evaluation characteristic values K of the solid fuel batching schemes of the preset types and the preset proportioning through the comprehensive evaluation model, and comparing and analyzing the K values to quantitatively evaluate the advantages and disadvantages of different fuel batching schemes. The model is convenient to calculate, has important guiding significance for selection and optimization of types and proportions of fuels produced by field sintering, and can be used for evaluation of other types of fuels for sintering for modification of corresponding indexes.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims (10)

1. A method for establishing a comprehensive evaluation model of solid fuel for sintering is characterized by comprising the following steps: the method comprises the following steps:
s1, the comprehensive evaluation model of the solid fuel for sintering considers the mixed combustion reaction behavior of different types of solid fuels in an adiabatic system based on the energy balance principle, and is mainly established at the theoretical combustion temperature TcHarmful gas emission index IeAnd a cost index of use WuThree main indexes;
s2, establishing a fuel evaluation characteristic value K based on meeting the production requirement based on the three main indexes;
the fuel evaluation characteristic value is theoretical combustion temperature/(harmful gas emission index multiplied by use cost index) and is dimensionless; that is to say that the first and second electrodes,
Figure FDA0003269453830000011
s3, calculating fuel evaluation characteristic values K of the solid fuel batching schemes of the preset types and the preset proportions through the comprehensive evaluation model, and comparing and analyzing the K values to quantitatively evaluate the advantages and disadvantages of different fuel batching schemes;
the larger the K value is, the better the batching scheme is, and the smaller the K value is, the worse the batching scheme is; therefore, the optimization of the selection scheme of the solid fuel for sintering is realized.
2. The method for establishing the comprehensive evaluation model of solid fuel for sintering according to claim 1, wherein the method is characterized in that: in step S1, the theoretical combustion temperature TcThe method comprises the following sub-indexes: heat quantity Q of each fuel combustioniInitial temperature T0And average specific heat capacity cp；
The harmful gas emission index IeThe method comprises the following sub-indexes: fuel volatile content ViN element content NiAnd the content S of S elementi；
The cost index of use WuThe method comprises the following sub-indexes: price of entering factory WiAnd grindability index Hi；
In addition, the three main indexes in the comprehensive evaluation model of the solid fuel for sintering further comprise the following common sub-indexes: mass M of sinter mixsFuel ratio YfAnd mass ratio X of each fueli。
3. The method for establishing the comprehensive evaluation model of the solid fuel for sintering according to claim 2, characterized in that: the theoretical combustion temperature TcThe calculation formula is as follows: the theoretical combustion temperature is the total calorific value of solid fuel combustion/(mass of sintering mixture-mass of sintering mixture x fuel ratio)/average specific heat capacity-initial temperature; the total heating value of solid fuel combustion is the sum of the products of each fuel combustion heating value, the quality of the sintering mixture, the fuel proportion and the mass ratio of each fuel;
that is to say that the first and second electrodes,
Figure FDA0003269453830000021
Figure FDA0003269453830000022
wherein beta is a correction factor, and an empirical value of 1.4, namely the ratio of the measured temperature of the sintering mixture to the theoretically calculated temperature, is taken; n is the total number of fuel types used; i is a corresponding fuel, i is 1, 2, … …, n.
4. According to claimThe method for establishing the comprehensive evaluation model of the solid fuel for sintering, according to claim 3, is characterized in that: the harmful gas emission index IeThe calculation formula is as follows: the harmful gas emission index (sintered mixture quality x fuel proportioning x mass of each fuel) is x (volatile content + N element content + S element content);
that is to say that the first and second electrodes,
Figure FDA0003269453830000023
5. the method for establishing the comprehensive evaluation model of the solid fuel for sintering according to claim 3, characterized in that: the cost index of use WuThe calculation formula is as follows: the cost index is the quality of the sintering mixture, the fuel ratio, the mass ratio of each fuel, the plant price and the grindability index;
that is to say that the first and second electrodes,
Figure FDA0003269453830000024
6. the method for establishing the comprehensive evaluation model of the solid fuel for sintering according to claim 5, characterized in that: the grindability index HiThe calculation method of (2) is as follows:
Hi＝Zi/Giti；
wherein Z isiThe weight of the crushed fuel with the grain diameter less than 5mm is kg; giKg of the mass of a certain fuel before crushing; t is tiThe time taken for crushing a certain fuel, min.
7. The method for establishing the comprehensive evaluation model of solid fuel for sintering according to claim 6, characterized in that: the specific calculation formula of the fuel evaluation characteristic value K is as follows:
Figure FDA0003269453830000031
8. the method for establishing the comprehensive evaluation model of the solid fuel for sintering according to claim 2, characterized in that: in the comprehensive evaluation model of the solid fuel for sintering, the combustion calorific value Q of each fueliThe heating value is low, and is measured and calculated according to the national standard under the condition of a dry basis; initial temperature T0And average specific heat capacity cpIs a sintering production parameter; in the solid fuel comprehensive evaluation model for sintering, the quality M of a sintering mixturesFuel ratio YfAnd mass ratio X of each fueliAre all sintering production parameters; fuel volatile content ViN element content NiAnd the content S of S elementiThe measurement and calculation are carried out according to the national standard under the dry base condition.
9. The method for establishing the comprehensive evaluation model of the solid fuel for sintering according to claim 1, characterized in that: the solid fuel includes but is not limited to one or more of biomass coke, semi coke, blast furnace dust, anthracite and coke powder.
10. Use of the comprehensive evaluation model for solid fuel for sintering obtained by the method for establishing the comprehensive evaluation model for solid fuel for sintering according to any one of claims 1 to 9, characterized in that: the comprehensive evaluation model of the solid fuel for sintering modifies the corresponding sub-indexes, and when the gas fuel is used for sintering production, the corresponding mass ratio of the gas fuel in the model can be changed into volume ratio; volatile content V corresponding to gas fueliCan be removed; and the corresponding N element content NiAnd the content S of S elementiChangeable to release NO during combustion of unit volume of gaseous fuelxAnd SO2In mg/m3Both are measured by a unit volume of gas fuel combustion flue gas analysis experiment; after index correction, the model can be applied to the use schemes of the three sintering fuels for gas-gas mixture, gas-solid mixture and solid-solid mixtureAnd (4) comprehensive evaluation.
CN202111097072.9A 2021-09-18 2021-09-18 Method for establishing comprehensive evaluation model of solid fuel for sintering and application Pending CN113868851A (en)

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