CN104152613B - The comparative approach of the metallurgical effect of a kind of coke and system - Google Patents

The comparative approach of the metallurgical effect of a kind of coke and system Download PDF

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CN104152613B
CN104152613B CN201410422918.5A CN201410422918A CN104152613B CN 104152613 B CN104152613 B CN 104152613B CN 201410422918 A CN201410422918 A CN 201410422918A CN 104152613 B CN104152613 B CN 104152613B
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coke
quality index
metallurgical
value
cost
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CN104152613A (en
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闵荣辉
周平
罗清明
毛晓斌
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Sichuan Desheng Group Vanadium Titanium Co Ltd
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Sichuan Desheng Group Vanadium Titanium Co Ltd
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Abstract

This application provides the comparative approach of the metallurgical effect of a kind of coke and system, the method and system and first obtain multiple quality index of every kind of coke in multiple coke;Then standard is used to obtain the standard extreme difference of coke according to the coke of above-mentioned quality index and blast furnace;Afterwards the influence coefficient of yield and the influence coefficient of quality index Coke Rate are substituted into the metallurgical value calculation formula preset by the cost control index of above-mentioned data and blast furnace, quality index again, calculate the metallurgical value that each quality index obtaining every kind of coke is corresponding;Then the metallurgical average metallurgy on average obtaining every kind of coke that is worth corresponding for each quality index is worth;The average metallurgy of coke is worth and substantially reflects the metallurgical effect that this kind of coke can obtain, and average metallurgical value the between multiple coke is compared the metallurgical effect the best that can compare which kind of coke such that it is able to instruct buying。Can quickly obtaining comparative result, the used time is short, efficiency is higher。

Description

The comparative approach of the metallurgical effect of a kind of coke and system
Technical field
The application relates to metallurgical technology field, more particularly, it relates to the comparative approach of the metallurgical effect of a kind of coke and system。
Background technology
Smelter coke has the effect of skeleton, exothermic mixture, reducing agent, carburizer in blast furnace v-bearing titanomagnetite smelting, the quality of the steady genial yield index of the fine or not relation blast furnace of its quality。Under day by day harsh market condition, the optimization of the steady genial production target of iron and steel blast furnace, to reducing ironmaking production cost, promotes iron and steel enterprise's market competitiveness and has very important effect。The 30% of ironmaking totle drilling cost is accounted for through measuring and calculating ironmaking coke cost, the manufacturer of present stage coke is numerous, quality is different, the various quality index of coke are also different on the impact of blast furnace, in order to obtain good economic benefit, smelter generally requires the coke selecting metallurgical effect best in the coke of numerous coke production producers supply, at present when selecting coke only by the use of long period after just can compare the quality of metallurgical effect, then instruct buying with this。But this comparative approach requires time for longer, inefficient。
Summary of the invention
In view of this, the application provides comparative approach and the system of the metallurgical effect of a kind of coke, for selecting, according to comparative result, the coke that metallurgical effect is best from multiple coke, has solved longer, inefficient problem of existing comparative approach used time。
To achieve these goals, it is proposed that scheme as follows:
The comparative approach of the metallurgical effect of a kind of coke, is applied to the ironmaking processes of blast furnace, comprises the steps:
Obtain multiple quality index of every kind of coke in multiple coke;
Coke according to the plurality of quality index and described blast furnace uses the standard extreme difference of each described quality index of criterion calculation;
The influence coefficient of yield and the cost control index of described blast furnace are substituted into the metallurgical value calculation formula preset by each described quality index, the described standard extreme difference of each described quality index, the influence coefficient of each described quality index Coke Rate, each described quality index, calculates the metallurgical value that each described quality index of the plurality of quality index obtaining described every kind of coke is corresponding;
Above calculated multiple described metallurgical value are averaged, obtain the average metallurgical of described every kind of coke and be worth;
Described average metallurgical value of described every kind of coke being compared, the highest coke of average metallurgical value is the coke that metallurgical effect is best。
Preferably, described cost control index includes pig iron control cost, manufacturing expenses of work shop, coke ratio, ore cost, coal ejection ratio and coal dust price。
Preferably, described metallurgical value calculation formula is:
Described metallurgical value=(P-P1-C2xP3-g (1-k1 δ))/(C1 (1-k2 δ));
Wherein: P is that the described pig iron controls cost, P1 to be described ore cost, P3 be described coal dust price, C1 is described coke ratio, C2 is described coal ejection ratio, g is described workshop manufacturing cost, δ is described standard extreme difference, k1 is described quality index to the influence coefficient of yield, k2 is the influence coefficient of described quality index Coke Rate。
Preferably, described quality index includes ash, sulfur content, crushing strength, abrasion resistance, reactivity, post reaction strength, water content or fixed carbon。
Preferably, described coke uses standard to include:
Ash is 13.5%, fixed carbon is 85%, sulfur content is 0.7%, water content is 6%, the numerical value of crushing strength is 78, the numerical value of abrasion resistance is 7, reactive numerical value be 32 and the numerical value of post reaction strength be 58。
The comparison system of the metallurgical effect of a kind of coke, is applied to the ironmaking processes of blast furnace, including:
Acquisition module, for obtaining multiple quality index of every kind of coke in multiple coke;
First computing module, uses the standard extreme difference of each described quality index of criterion calculation for the coke according to the plurality of quality index and described blast furnace;
Second computing module, for the influence coefficient of yield and the cost control index of described blast furnace are substituted into the metallurgical value calculation formula preset by each described quality index, the described standard extreme difference of each described quality index, the influence coefficient of each described quality index Coke Rate, each described quality index, calculate the metallurgical value that each described quality index of the plurality of quality index obtaining described every kind of coke is corresponding;
3rd computing module, for above calculated multiple described metallurgical value being averaged, obtains the average metallurgical of described every kind of coke and is worth;
Relatively output module, compares described average metallurgical value of described every kind of coke, and average metallurgy is worth the highest coke and is the coke that metallurgical effect is best。
Preferably, described cost control index includes pig iron control cost, manufacturing expenses of work shop, coke ratio, ore cost, coal ejection ratio and coal dust price。
Preferably, described metallurgical value calculation formula is:
Described metallurgical value=(P-P1-C2xP3-g (1-k1 δ))/(C1 (1-k2 δ));
Wherein: P is that the described pig iron controls cost, P1 to be described ore cost, P3 be described coal dust price, C1 is described coke ratio, C2 is described coal ejection ratio, g is described workshop manufacturing cost, δ is described standard extreme difference, k1 is described quality index to the influence coefficient of yield, k2 is the influence coefficient of described quality index Coke Rate。
Preferably, described quality index includes ash, sulfur content, crushing strength, abrasion resistance, reactivity, post reaction strength, water content or fixed carbon。
Preferably, described coke uses standard to include:
Ash is 13.5%, fixed carbon is 85%, sulfur content is 0.7%, water content is 6%, the numerical value of crushing strength is 78, the numerical value of abrasion resistance is 7, reactive numerical value be 32 and the numerical value of post reaction strength be 58。
As can be seen from the above technical solutions, this application provides the comparative approach of the metallurgical effect of a kind of coke and system, the method and system and first obtain multiple quality index of every kind of coke in multiple coke;Then standard is used to obtain the standard extreme difference of coke according to the coke of above-mentioned quality index and blast furnace;Afterwards the influence coefficient of yield and the influence coefficient of quality index Coke Rate are substituted into the metallurgical value calculation formula preset by the cost control index of above-mentioned data and blast furnace, quality index again, calculate the metallurgical value that each quality index obtaining every kind of coke is corresponding;Then the metallurgical average metallurgy on average obtaining every kind of coke that is worth corresponding for each quality index is worth;The average metallurgy of coke is worth and substantially reflects the metallurgical effect that this kind of coke can obtain, and average metallurgical value the between multiple coke is compared the metallurgical effect the best that can compare which kind of coke such that it is able to instruct buying。Owing to this comparative approach is without just comparing the quality of metallurgical effect after passing through longer use, therefore, it is possible to quickly obtain comparative result, the used time is short, efficiency is higher。
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the application, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings。
The flow chart of the comparative approach of the metallurgical effect of a kind of coke that Fig. 1 provides for the embodiment of the present application;
The structure chart of the comparison system of the metallurgical effect of a kind of coke that Fig. 2 provides for another embodiment of the application。
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described embodiment is only some embodiments of the present application, rather than whole embodiments。Based on the embodiment in the application, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of the application protection。
Embodiment one
The measuring method of the economic worth of a kind of coke that Fig. 1 provides for the embodiment of the present application。
As it is shown in figure 1, the measuring method of the economic worth of the coke of the present embodiment offer comprises the steps:
S101: obtain multiple quality index of every kind of coke in multiple coke。
Enter factory's coke and often have multiple, every kind of coke is sampled, then pass through the modes such as chemical examination and obtain multiple quality index of every kind of coke。These quality index include ash, sulfur content, crushing strength, abrasion resistance, reactivity, post reaction strength, water content or fixed carbon。
The present embodiment have chosen 5 kinds of coke and compares, and respectively A is burnt, B is burnt, C is burnt, D is burnt and E is burnt。The quality index of every kind of coke is as shown in table 1。
Table 1
S102: calculate the standard extreme difference of each quality index。
The coke setting this blast furnace uses standard, and the coke of the prescription namely meeting this blast furnace uses standard。The present embodiment provides a kind of coke to use standard, as shown in table 2。
Table 2
Coke according to each quality index and blast furnace uses the standard extreme difference of each quality index of criterion calculation。This step is as shown in table 3 to the result of calculation of data presented above。
Table 3
S103: calculate the metallurgical value that each quality index of every kind of coke is corresponding。
First the cost control index of this blast furnace is set。The present embodiment provides the cost control index of blast furnace as shown in table 4。
Table 4
Choose a quality index, by itself with the standard extreme difference of its correspondence, the influence coefficient of Coke Rate and the influence coefficient to yield, also have the cost control index set in previous step to substitute into the metallurgical value calculation formula preset, calculate the metallurgical value that this each quality index is corresponding。
The wherein influence coefficient of quality index Coke Rate and the influence coefficient of yield is as shown in table 5。
Table 5
Metallurgical value calculation formula in the present embodiment is from the evolution of Pavlov's iron ore computing formula。
The computing formula that former Soviet Union's M.A. Pavlov's iron ore metallurgy is worth is shown below:
P1=(F ÷ f) × (p-C × p2-c × p3-g) (1-1)
In formula: the metallurgical value of p1 iron ore;The grade of F iron ore;F pig iron content (%);The P pig iron controls cost (yuan/ton);C coke ratio (ton/ton);P2 coke price (ton/ton);C pig iron solvent consumption (ton/ton);P3 solvent price (ton/ton);G pig iron processing charges (yuan/ton)。
In the iron ore metallurgy value assessment method of Pavlov, it is coke ratio that coke ratio can be divided into two: one, another is coal ejection ratio, consider when calculating that grade raises the impact on yield and processing charges and coke ratio simultaneously, improve 1% by grade, increase production 2%, joint burnt 1.5%, when existing use fluxed sinter and pelletizing, formula can develop into:
P1=(F ÷ f) (p-C1 (1-0.015 δ) p2-C2 × p3-g (1-0.02 δ)) (1-2)
In formula: C1 base period coke ratio (ton/ton);The difference (%) of δ iron mine grade and feed grade;P2 coke price (yuan/ton);C2 coal ejection ratio (ton/ton);P3 coal dust price (yuan/ton);G manufacturing expenses of work shop (yuan/ton)。
According to above formula, formula is developed into:
P2=(P-P1-C2 × P3-g (1-k1 δ))/(C1 (1-k2 δ)) (1-3)
In formula: P2-metallurgy is worth;C1 base period coke ratio (ton/ton);δ standard extreme difference (difference of coke setting index and actual mass index);P1 appraises and decides ore cost (yuan/ton);C2 coal ejection ratio (ton/ton);P3 coal dust price (yuan/ton);G manufacturing expenses of work shop (yuan/ton)。
Above parameter substitution formula (1-3) can be obtained the metallurgical value that each quality index of coke is corresponding, then calculate the metallurgical value that all quality index are corresponding more one by one。For five kinds of coke in the present embodiment, metallurgical value calculation result corresponding to its each quality index is as shown in table 6。
Table 6
S104: calculate the average metallurgical of every kind of coke and be worth。
Metallurgical value corresponding for each quality index corresponding for above calculated coke is averaged, obtains the average metallurgical of coke and be worth。
Table 7 is that after the metallurgical value that each quality index of five kinds of coke is corresponding being averaged in the present embodiment, the average metallurgical of gained is worth。
Table 7
Metallurgical effect between S105: more every kind coke。
Average metallurgical value between every kind of coke is compared, the coke best to determine metallurgical effect。Comparative result: the metallurgical optimum that is worth of 5 kinds of coke takes second place for D Jiao, Jiao C, namely the metallurgical effect of this coke be best enter the price at factory minimum and average metallurgical be worth relative also higher, thus completing to compare, if selecting this coke, good metallurgical effect can be obtained。
Which kind of certainly choose coke to also need to see that it enters price at factory lattice, it is necessary to metallurgical effect, enter the combined factors such as price at factory lattice and compare。
As can be seen from the above technical solutions, present embodiments providing the comparative approach of the metallurgical effect of a kind of coke, first the method obtains multiple quality index of every kind of coke in multiple coke;Then standard is used to obtain the standard extreme difference of coke according to the coke of above-mentioned quality index and blast furnace;Afterwards the influence coefficient of yield and the influence coefficient of quality index Coke Rate are substituted into the metallurgical value calculation formula preset by the cost control index of above-mentioned data and blast furnace, quality index again, calculate the metallurgical value that each quality index obtaining every kind of coke is corresponding;Then the metallurgical average metallurgy on average obtaining every kind of coke that is worth corresponding for each quality index is worth;The average metallurgy of coke is worth and substantially reflects the metallurgical effect that this kind of coke can obtain, and average metallurgical value the between multiple coke is compared the metallurgical effect the best that can compare which kind of coke such that it is able to instruct buying。Owing to this comparative approach is without just comparing the quality of metallurgical effect after passing through longer use, therefore, it is possible to quickly obtain comparative result, the used time is short, efficiency is higher。
Embodiment two
The structure chart of the comparison system of the metallurgical effect of a kind of coke that Fig. 2 provides for another embodiment of the application。
As in figure 2 it is shown, the comparison system of the metallurgical effect of the coke of the present embodiment offer includes acquisition module the 10, first computing module the 20, second computing module the 30, the 3rd computing module 40 and compares output module 50。
Acquisition module 10 is for obtaining multiple quality index of every kind of coke in multiple coke。
Enter factory's coke and often have multiple, every kind of coke is sampled, then pass through the modes such as chemical examination and obtain multiple quality index of every kind of coke。These quality index include ash, sulfur content, crushing strength, abrasion resistance, reactivity, post reaction strength, water content or fixed carbon。
The present embodiment have chosen 5 kinds of coke and compares, and respectively A is burnt, B is burnt, C is burnt, D is burnt and E is burnt。The quality index of every kind of coke is as shown in table 1。
First computing module 20 is for calculating the standard extreme difference of each quality index。
The coke setting this blast furnace uses standard, and the coke of the prescription namely meeting this blast furnace uses standard。The present embodiment provides a kind of coke to use standard, as shown in table 2。
Coke according to each quality index and blast furnace uses the standard extreme difference of each quality index of criterion calculation。This step is as shown in table 3 to the result of calculation of data presented above。
Second computing module 30 is worth for the metallurgy that each quality index calculating every kind of coke is corresponding。
First the cost control index of this blast furnace is set。The present embodiment provides the cost control index of blast furnace as shown in table 4。
Choose a quality index, by itself with the standard extreme difference of its correspondence, the influence coefficient of Coke Rate and the influence coefficient to yield, also have the cost control index set in previous step to substitute into the metallurgical value calculation formula preset, calculate the metallurgical value that this each quality index is corresponding。
The wherein influence coefficient of quality index Coke Rate and the influence coefficient of yield is as shown in table 5。
Metallurgical value calculation formula in the present embodiment is from the evolution of Pavlov's iron ore computing formula。
The computing formula that former Soviet Union's M.A. Pavlov's iron ore metallurgy is worth is shown below:
P1=(F ÷ f) × (p-C × p2-c × p3-g) (1-1)
In formula: the metallurgical value of p1 iron ore;The grade of F iron ore;F pig iron content (%);The P pig iron controls cost (yuan/ton);C coke ratio (ton/ton);P2 coke price (ton/ton);C pig iron solvent consumption (ton/ton);P3 solvent price (ton/ton);G pig iron processing charges (yuan/ton)。
In the iron ore metallurgy value assessment method of Pavlov, it is coke ratio that coke ratio can be divided into two: one, another is coal ejection ratio, consider when calculating that grade raises the impact on yield and processing charges and coke ratio simultaneously, improve 1% by grade, increase production 2%, joint burnt 1.5%, when existing use fluxed sinter and pelletizing, formula can develop into:
P1=(F ÷ f) (p-C1 (1-0.015 δ) p2-C2 × p3-g (1-0.02 δ)) (1-2)
In formula: C1 base period coke ratio (ton/ton);The difference (%) of δ iron mine grade and feed grade;P2 coke price (yuan/ton);C2 coal ejection ratio (ton/ton);P3 coal dust price (yuan/ton);G manufacturing expenses of work shop (yuan/ton)。
According to above formula, formula is developed into:
P2=(P-P1-C2 × P3-g (1-k1 δ))/(C1 (1-k2 δ)) (1-3)
In formula: P2-metallurgy is worth;C1 base period coke ratio (ton/ton);δ standard extreme difference (difference of coke setting index and actual mass index);P1 appraises and decides ore cost (yuan/ton);C2 coal ejection ratio (ton/ton);P3 coal dust price (yuan/ton);G manufacturing expenses of work shop (yuan/ton)。
Above parameter substitution formula (1-3) can be obtained the metallurgical value that each quality index of coke is corresponding, then calculate the metallurgical value that all quality index are corresponding more one by one。For five kinds of coke in the present embodiment, metallurgical value calculation result corresponding to its each quality index is as shown in table 6。
3rd computing module 40 is worth for calculating the average metallurgical of every kind of coke。
Metallurgical value corresponding for each quality index corresponding for above calculated coke is averaged, obtains the average metallurgical of coke and be worth。
Table 7 is that after the metallurgical value that each quality index of five kinds of coke is corresponding being averaged in the present embodiment, the average metallurgical of gained is worth。
Relatively output module 50 is for the metallurgical effect between more every kind of coke。
Average metallurgical value between every kind of coke is compared, the coke best to determine metallurgical effect。Comparative result: the metallurgical optimum that is worth of 5 kinds of coke takes second place for D Jiao, Jiao C, namely the metallurgical effect of this coke be best enter the price at factory minimum and average metallurgical be worth relative also higher, thus completing to compare, if selecting this coke, good metallurgical effect can be obtained。
As can be seen from the above technical solutions, present embodiments provide the comparison system of the metallurgical effect of a kind of coke, this system includes acquisition module, the first computing module, the second computing module and the 3rd computing module, and first this system obtains multiple quality index of every kind of coke in multiple coke;Then standard is used to obtain the standard extreme difference of coke according to the coke of above-mentioned quality index and blast furnace;Afterwards the influence coefficient of yield and the influence coefficient of quality index Coke Rate are substituted into the metallurgical value calculation formula preset by the cost control index of above-mentioned data and blast furnace, quality index again, calculate the metallurgical value that each quality index obtaining every kind of coke is corresponding;Then the metallurgical average metallurgy on average obtaining every kind of coke that is worth corresponding for each quality index is worth;The average metallurgy of coke is worth and substantially reflects the metallurgical effect that this kind of coke can obtain, and average metallurgical value the between multiple coke is compared the metallurgical effect the best that can compare which kind of coke such that it is able to instruct buying。Owing to this comparison system is without just comparing the quality of the metallurgical effect between multiple coke after passing through longer use, therefore, it is possible to quickly obtain comparative result, the used time is short, efficiency is higher。
In this specification, each embodiment adopts the mode gone forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually referring to。Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the application。The multiple amendment of these embodiments be will be apparent from for those skilled in the art, and generic principles defined herein when without departing from spirit herein or scope, can realize in other embodiments。Therefore, the application is not intended to be limited to the embodiments shown herein, and is to fit to the widest scope consistent with principles disclosed herein and features of novelty。

Claims (6)

1. a comparative approach for the metallurgical effect of coke, is applied to the ironmaking processes of blast furnace, comprises the steps: to obtain multiple quality index of every kind of coke in multiple coke;Coke according to the plurality of quality index and described blast furnace uses the standard extreme difference of each described quality index of criterion calculation;The influence coefficient of yield and the cost control index of described blast furnace are substituted into the metallurgical value calculation formula preset by each described quality index, the described standard extreme difference of each described quality index, the influence coefficient of each described quality index Coke Rate, each described quality index, calculates the metallurgical value that each described quality index of the plurality of quality index obtaining described every kind of coke is corresponding;Above calculated multiple described metallurgical value are averaged, obtain the average metallurgical of described every kind of coke and be worth;Described average metallurgical value of described every kind of coke being compared, the highest coke of average metallurgical value is the coke that metallurgical effect is best;Described cost control index includes the pig iron and controls cost, manufacturing expenses of work shop, coke ratio, ore cost, coal ejection ratio and coal dust price;It is characterized in that, described metallurgical value calculation formula is: described metallurgical value=(P-P1-C2xP3-g (1-k1 δ))/(C1 (1-k2 δ));Wherein: P is that the pig iron controls cost, P1 to be ore cost, P3 be coal dust price, C1 is coke ratio, C2 is coal ejection ratio, g is workshop manufacturing cost, δ is standard extreme difference, k1 is quality index to the influence coefficient of yield, k2 is the influence coefficient of quality index Coke Rate。
2. comparative approach as claimed in claim 1, it is characterised in that described quality index includes ash, sulfur content, crushing strength, abrasion resistance, reactivity, post reaction strength, water content or fixed carbon。
3. comparative approach as claimed in claim 1, it is characterized in that, described coke uses standard to include: ash is 13.5%, fixed carbon is 85%, sulfur content is 0.7%, water content is 6%, the numerical value of crushing strength is 78, the numerical value of abrasion resistance is 7, reactive numerical value be 32 and the numerical value of post reaction strength be 58。
4. a comparison system for the metallurgical effect of coke, is applied to the ironmaking processes of blast furnace, including: acquisition module, for obtaining multiple quality index of every kind of coke in multiple coke;First computing module, uses the standard extreme difference of each described quality index of criterion calculation for the coke according to the plurality of quality index and described blast furnace;Second computing module, for the influence coefficient of yield and the cost control index of described blast furnace are substituted into the metallurgical value calculation formula preset by each described quality index, the described standard extreme difference of each described quality index, the influence coefficient of each described quality index Coke Rate, each described quality index, calculate the metallurgical value that each described quality index of the plurality of quality index obtaining described every kind of coke is corresponding;3rd computing module, for above calculated multiple described metallurgical value being averaged, obtains the average metallurgical of described every kind of coke and is worth;Relatively output module, compares described average metallurgical value of described every kind of coke, and average metallurgy is worth the highest coke and is the coke that metallurgical effect is best;Described cost control index includes the pig iron and controls cost, manufacturing expenses of work shop, coke ratio, ore cost, coal ejection ratio and coal dust price;It is characterized in that, described metallurgical value calculation formula is: described metallurgical value=(P-P1-C2xP3-g (1-k1 δ))/(C1 (1-k2 δ));Wherein: P is that the pig iron controls cost, P1 to be ore cost, P3 be coal dust price, C1 is coke ratio, C2 is coal ejection ratio, g is workshop manufacturing cost, δ is standard extreme difference, k1 is quality index to the influence coefficient of yield, k2 is the influence coefficient of quality index Coke Rate。
5. comparison system as claimed in claim 4, it is characterised in that described quality index includes ash, sulfur content, crushing strength, abrasion resistance, reactivity, post reaction strength, water content or fixed carbon。
6. comparison system as claimed in claim 5, it is characterized in that, described coke uses standard to include: ash is 13.5%, fixed carbon is 85%, sulfur content is 0.7%, water content is 6%, the numerical value of crushing strength is 78, the numerical value of abrasion resistance is 7, reactive numerical value be 32 and the numerical value of post reaction strength be 58。
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