CN116562677A - New coal resource introduction evaluation method for blast furnace injection - Google Patents
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- 239000003245 coal Substances 0.000 title claims abstract description 135
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- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims abstract description 72
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- 238000012163 sequencing technique Methods 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims description 26
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 17
- 229910052717 sulfur Inorganic materials 0.000 claims description 17
- 239000011593 sulfur Substances 0.000 claims description 17
- 239000002802 bituminous coal Substances 0.000 claims description 12
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
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- 229910052799 carbon Inorganic materials 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
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- 239000002817 coal dust Substances 0.000 claims description 3
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
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Abstract
The invention discloses a method for evaluating the introduction of new resources of coal for blast furnace injection, which comprises the following steps: s1, acquiring new resource information of coal for blast furnace injection; the new resource information comprises a production place, a quality index and a factory price; s2, judging variety types of new resources according to the quality index and the fuel coal technical standard; s3, acquiring the current-period to-factory price of the new resource based on variety types, and comparing the current-period to-factory price of the existing anthracite, and judging whether the new resource has price advantage or not; s4, acquiring a field sampling sample of the new resource, comparing the field sampling sample with quality standards of corresponding categories in fuel coal technical standards, and judging the quality of the sample; s5, based on the sample quality evaluation and the price, performing cost performance evaluation on the new resource, and sequencing the cost performance, thereby confirming whether to introduce. The invention makes up the defects of complex, low accuracy and poor universality of the existing evaluation scheme for introducing new resources of the blast furnace injection coal, and is favorable for guiding raw material purchase and reducing production cost.
Description
Technical Field
The invention belongs to the field of blast furnace coal injection, and relates to a new resource introduction evaluation method for blast furnace coal injection.
Background
At present, the steel industry enters a micro-profit era, and the cost competition among enterprises is more and more vigorous. The blast furnace coal injection is one of important measures for greatly reducing production cost and improving economic benefit in modern blast furnace smelting. The current common means for controlling the coal injection cost of the blast furnace comprise adjustment of the coal ratio, introduction of new coal resources and the like, wherein the method for adjusting the coal ratio is difficult to form unification due to different coal sources of various factories, and most of the methods are one-factory-one scheme, even one-factory-multiple scheme, and have no universality. Therefore, an evaluation method capable of guiding the introduction of new coal resources gradually becomes a main method for guiding the cost reduction.
Because the introduction of new coal resources for blast furnace injection generally has great influence on the coal injection structure, the blast furnace production and the molten iron cost, various comprehensive evaluation needs to be carried out. For example, the invention of China with publication number of CN113267609B provides a method for evaluating the quality of coal for blast furnace injection, which comprises the steps of formulating an evaluation criterion of coal for injection and an evaluation weight of coal index for blast furnace injection; judging the varieties of the single-variety coal to be evaluated according to the evaluation standard of the coal for injection, respectively calculating the comprehensive quality standard-reaching rate PN of the single-variety coal for injection according to the introduction data of the coal for injection to be evaluated and the index evaluation weight of the coal for blast furnace injection, then calculating the total quality standard-reaching rate Ptotal of all the single-variety coal according to the comprehensive quality standard-reaching rate of the single-variety coal, and comparing the total quality standard-reaching rate Ptotal of all the single-variety coal with the target value Pmesh of the total quality standard-reaching rate of all the single-variety coal to be evaluated to judge whether the comprehensive quality of the single-variety coal to be evaluated is qualified. According to the scheme, the quality standard and the index weight of the coal for injection into the plant are set, the evaluation model is built, the quality of the coal for injection into the plant is evaluated, and the evaluation accuracy of the quality of the coal for injection into the blast furnace can be effectively improved.
However, the existing scheme needs to collect a large amount of data to perform complex calculation, the evaluation method is very complex, the defect of long introduction period of new coal resources is caused, only quality standards are referred to when evaluating whether to introduce new resources, the evaluation is not accurate enough, other problems occur after the previous evaluation accords with the standards, the production is affected, and the cost of introducing new resources is increased.
Disclosure of Invention
In view of the above, the invention aims to provide a new coal resource introduction evaluation method for blast furnace injection, which simplifies and processes the new coal resource introduction process, reduces the introduction difficulty, shortens the introduction period, reduces the cost of new coal introduction consumption, and has positive guiding significance for optimizing the coal injection structure, economic ingredients, benefit evaluation and raw material purchase.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a method for evaluating the introduction of new resources of coal for blast furnace injection comprises the following steps:
s1, acquiring new resource information of coal for blast furnace injection; the new resource information comprises a production place, a quality index and a factory price; the quality index comprises ash Ad New type Sulfur fraction St, d New type Volatile Vdaf New type Fixed carbon FCd New type Heat value Qgr, d New type Hardward abradable HGI New type And moisture Mt New type ；
S2, judging variety types of new resources according to the quality index and the fuel coal technical standard; the variety category comprises anthracite coal, bituminous coal, lean coal and sintered anthracite coal;
s21, prioritizing the judging indexes; the evaluation indexes comprise Vdaf, ad, qgr, d, st, d and HGI, and the first evaluation index, the second evaluation index, the third evaluation index, the fourth evaluation index and the fifth evaluation index are sequentially corresponding to each other according to the sequence;
s22, comparing the quality index with the first judging index, and judging the variety type of the new resource;
s23, if the previous-stage judging index does not judge the variety type of the resource, adding the next-stage judging index according to the priority sequence on the original basis to carry out comprehensive judgment until judging the variety type of the resource;
s3, based on variety types, obtaining the current-period to-plant ton price a of the new resource, and making a difference from the current-period to-plant ton price b of the existing anthracite, so as to meet the requirement of c=a-b; if c is less than 0, the new resource has price advantage; if c is more than or equal to 0, the new resource does not have price advantage, and the introduction flow is terminated;
s4, acquiring a field sampling sample of the new resource, comparing the field sampling sample with quality standards of corresponding categories in fuel coal technical standards, and judging the quality of the sample, wherein the method comprises the following steps: judging Ad A ≤Ad 1 Label (C) ，St,d A ≤St,d 1 Label (C) ，Vdaf A ≤Vdaf 1 Label (C) ，Qgr,d A ≥Qgr,d 1 Label (C) ，HGI A ≥HGI 1 Label (C) If the sample quality meets the requirement, the introduction flow is ended;
s5, performing cost performance evaluation on the new resource based on the sample quality evaluation and the price; measuring and calculating the cost performance of at least two types of currently used fuel coal in the same category, and sequencing the cost performance; if the cost performance sequence of the new resource is the first, the new resource is determined to be introduced as the coal for blast furnace injection, otherwise, the introduction flow is terminated.
Further, S6, a mass production test scheme is formulated and implemented, the mass production test condition is tracked, and the product quality condition is evaluated; if the mass production test has abnormal conditions, stopping the test, and ending the introduction flow; the abnormal conditions comprise suspended materials of the raw coal bin, poor coal grinding effect, increased stone coal and blockage of the blast furnace spray gun by coal dust.
Further, in the step S6, the quality of the product of the mass production test is evaluated, and if the Ad1 is less than or equal to 12%, st, d1 is less than or equal to 0.9%, vdaf1 is less than or equal to 23%, mt1 is less than or equal to 1.5%, FCdaf1 is more than or equal to 77%, MF1-100 is more than or equal to 95% and MF1-200 is more than or equal to 75% are simultaneously satisfied, the mass production test meets the quality standard of the product; otherwise, the product quality standard is not met.
Further, in S21, the fuel coal technical standards are as follows:
wherein Ad is ash, st, d sulfur, vdaf volatile, qgr, d heat value, HGI Hardward grindable, mt is moisture.
Further, in S23, if the variety class of the resource is not determined after the fifth evaluation index is added, performing comprehensive determination to obtain the number of items of the new resource according with each class; the variety category which accords with the most item is the category variety category of the new resource.
Further, in the step S5, calculating a quality score of each index is further included:
Q ash of ash ＝20％*[100+(Ad Datum -Ad A )/1％*9]；
Q Sulfur (S) ＝10％*[100+(St,d Datum -St,d A )/0.1％*4]；
Q Volatilizing ＝15％*[100+(Vdaf Datum -Vdaf A )/1％*4]；
Q Fixing ＝15％*[100-(FCd Datum -FCd A )/1％*3]；
Q Heating value ＝20％*[100-(Qgr,d Datum -Qgr,d A )/0.5MJ/kg*3]；
Q Grindability of ＝10％*[100-(HGI Datum -HGI A )/1*1]；
Q Water and its preparation method ＝10％*[100+(Mt Datum -Mt A )/1％*5]；
Wherein Q is Ash of ash 、Q Sulfur (S) 、Q Volatilizing 、Q Fixing 、Q Heat of the body 、Q Grindability of And Q Water and its preparation method Mass scores for ash, sulfur, volatiles, fixed carbon, heating value, halbach grindability, and moisture, respectively; ad (Ad) Datum 、St,d Datum 、Vdaf Datum 、FCd Datum 、Qgr,d Datum 、HGI Datum And Mt Datum Respectively the reference values of various indexes; ad (Ad) A 、St,d A 、Vdaf A 、FCd A 、Qgr,d A 、HGI A And Mt A Respectively, the sampled values of each index.
Further, the cost performance calculation method comprises the following steps:
η＝Q/P；
Q＝Q ash of ash +Q Sulfur (S) +Q Volatilizing +Q Fixing +Q Heat of the body +Q Grindability of +Q Water and its preparation method ；
Wherein eta is cost performance, Q is quality comprehensive score, and P is price per ton.
The invention has the beneficial effects that:
according to the scheme, objective and accurate measurement and evaluation of introduction, use, cost performance, benefit and the like of fuel coal can be performed in actual production, new resources are guaranteed to have good cost performance, production raw material cost is reduced, optimal cost performance is taken as a guide, raw material purchase can be guided, stability and controllability of fuel quality entering a factory are guaranteed, and universality and expansibility of an introduction flow are improved. Compared with the existing evaluation mode, the scheme provides a simple and stable fuel coal new resource introduction flow, simplifies the introduction flow, shortens the evaluation period to a great extent, and reduces the time cost for introducing new resource evaluation; meanwhile, the scheme evaluates based on actual production, an evaluation mechanism is more perfect and accurate, and the problem of increasing the introduction cost caused by inaccurate evaluation can be avoided.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a flow chart of a method for evaluating the introduction of new resources of coal for blast furnace injection.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the invention; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present invention, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1, a method for evaluating new coal resource introduction for blast furnace injection includes the following steps:
s1, acquiring new resource information of coal for blast furnace injection; the new resource information comprises a production place, a quality index and a factory price; the mass isThe index includes ash Ad New type Sulfur fraction St, d New type Volatile Vdaf New type Fixed carbon FCd New type Heat value Qgr, d New type Hardward abradable HGI New type And moisture Mt New type ；
S2, judging variety types of new resources according to the quality index and the fuel coal technical standard; the variety category comprises anthracite coal, bituminous coal, lean coal and sintered anthracite coal;
s21, prioritizing the judging indexes; the evaluation indexes comprise Vdaf, ad, qgr, d, st, d, HGI and Mt, and the first evaluation index, the second evaluation index, the third evaluation index, the fourth evaluation index and the fifth evaluation index are sequentially corresponding to each other according to the sequence;
s22, comparing the quality index with the first judging index, and judging the variety type of the new resource;
s23, if the previous-stage judging index does not judge the variety type of the resource, adding the next-stage judging index according to the priority sequence on the original basis to carry out comprehensive judgment until judging the variety type of the resource;
s3, obtaining a unit/ton of the new resource from the current period to the plant price based on the variety category, and making a difference from the unit/ton of the current period to the plant price of the anthracite, so as to meet the requirement of c=a-b; if c is less than 0, the new resource has price advantage; if c is more than or equal to 0, the new resource does not have price advantage, and the introduction flow is terminated; in the step, the current factory price is obtained from the factory price in S1, and the price index is deviated due to inconsistent factory time and inconsistent factory time in consideration of market price fluctuation and the quality difference of fuel coal of the same class, so that the cost performance evaluation can be directly influenced. Therefore, the price of all fuel coals in the same category needs to be valued under the same reference condition in the same period, which is favorable for accurately evaluating the use economy of the variety of coals.
S4, acquiring a field sampling sample of the new resource, comparing the field sampling sample with quality standards of corresponding categories in fuel coal technical standards, and judging the quality of the sample, wherein the method comprises the following steps: judging Ad A ≤Ad 1 Label (C) ，St,d A ≤St,d 1 Label (C) ，Vdaf A ≤Vdaf 1 Label (C) ，Qgr,d A ≥Qgr,d 1 Label (C) ，HGI A ≥HGI 1 Label (C) If the sample quality meets the requirement, the introduction flow is ended; if the conditions are met at the same time, the quality of the sample is judged to meet the requirements, and the subsequent process can be continued.
S5, performing cost performance evaluation on the new resource based on the sample quality evaluation and the price; measuring and calculating the cost performance of at least two types of currently used fuel coal in the same category, and sequencing the cost performance; if the cost performance sequence of the new resource is the first, the new resource is determined to be introduced as the coal for blast furnace injection, otherwise, the introduction flow is terminated.
S6, formulating and implementing a mass production test scheme, tracking the mass production test condition, and evaluating the product quality condition; if the mass production test has abnormal conditions, stopping the test, and ending the introduction flow; the abnormal conditions comprise hanging materials in a raw coal bin, poor coal grinding effect, increase of stone coal and blockage of a blast furnace spray gun by coal dust; evaluating the quality of the product in the mass production test, and if the quality of Ad1 is less than or equal to 12%, st, d1 is less than or equal to 0.9%, vdaf1 is less than or equal to 23%, mt1 is less than or equal to 1.5%, FCdaf1 is more than or equal to 77%, MF1-100 is more than or equal to 95% and MF1-200 is more than or equal to 75% are met, the mass production test meets the quality standard of the product; otherwise, the product quality standard is not met
In this embodiment, assuming that the new fuel coal resource is a variety a, the currently used existing fuel coal includes a variety B and a variety C, and in S1, the quality index of the new fuel coal resource a is obtained as shown in the following table 1:
TABLE 1 Fuel coal A quality index
S2, judging the category of the variety based on the variety quality index and the fuel coal technical standard, wherein the fuel coal technical standard is shown in the following table 2:
TABLE 2 Fuel coal technical Standard
The specific judgment rule is as follows:
the first evaluation index Vdaf:
if Vdaf New type Less than or equal to 10 percent, meets Vdaf 1 Label (C) Judging that the variety is possibly the anthracite and sintered anthracite if the standard is less than or equal to 10%;
if 10% < Vdaf New type Less than or equal to 18 percent, meets Vdaf 1 Label (C) Judging that the variety is possibly lean coal or smoke coal;
if 18% < Vdaf New type Less than or equal to 35 percent, meets Vdaf 1 Label (C) And judging the variety as the bituminous coal if the standard is less than or equal to 35%.
If the first judging index cannot judge the category of the variety of coal, the second judging index is added and referenced.
Second evaluation index Ad:
if Ad New type Less than or equal to 10.8 percent, meets the requirement of Ad 1 Label (C) Judging whether the variety is possible to be sprayed with bituminous coal, lean coal or sintered anthracite coal if the standard is less than or equal to 10.8%;
if 10.8% < Ad New type Less than or equal to 11.8 percent, meets the requirement of Ad 1 Label (C) Judging that the variety is possibly blown lean coal, blown anthracite or sintered anthracite if the standard is less than or equal to 11.8%;
if 11.8% < Ad New type Less than or equal to 12.8 percent, meets the requirement of Ad 1 Label (C) Judging whether the variety is the anthracite or the sintered anthracite according to the standard of less than or equal to 12.8 percent;
if 12.8% < Ad New type Less than or equal to 14.5 percent, meets the requirement of Ad 1 Label (C) And judging the variety to be sintered anthracite if the standard is less than or equal to 14.5%.
If the first and second judging indexes cannot comprehensively judge the category of the variety of coal, adding a reference to execute a third judging index.
Third evaluation index Qgr, d:
if Qgr, d New type More than or equal to 28MJ/kg, meets Qgr, d 1 Label (C) Judging whether the variety is the blown bituminous coal, the sintered anthracite coal or the blown lean coal according to the standard of more than or equal to 28 MJ/kg;
if Qgr, d New type More than or equal to 29MJ/kg, meets Qgr, d 1 Label (C) Judging whether the variety is sintered anthracite, sprayed anthracite or sprayed lean coal according to the standard of more than or equal to 29 MJ/kg;
if Qgr, d New type More than or equal to 30MJ/kg, meets Qgr, d 1 Label (C) And if the standard of more than or equal to 30MJ/kg is adopted, the variety is judged to be possibly anthracite or lean coal.
If the first, second and third judging indexes can not comprehensively judge the category of the variety of coal, adding a reference to execute a fourth judging index.
Fourth evaluation index St, d:
if St, d New type Less than or equal to 0.75 percent, meets St, d 1 Label (C) Judging whether the variety is blown lean coal, sintered anthracite, blown bituminous coal or blown anthracite according to the standard of less than or equal to 0.75 percent;
if 0.75% < St, d New type Less than or equal to 0.85 percent, meets St, d 1 Label (C) And (3) judging whether the variety is the bituminous coal or the anthracite coal according to the standard of less than or equal to 0.85 percent.
If the first, second, third and fourth judging indexes can not comprehensively judge the category of the variety of coal, the fifth judging index is added and referenced.
Fifth evaluation index HGI:
if HGI New type More than or equal to 60, meets HGI 1 Label (C) Judging whether the variety is possibly to spray bituminous coal or lean coal or anthracite coal;
if HGI New type Not less than 65, meets HGI 1 Label (C) Judging whether the variety is lean coal or anthracite;
if HGI New type Not less than 70, meets HGI 1 Label (C) Judging the variety to be anthracite coal;
if HGI New type And if the temperature is extremely low or 0, judging the variety as sintered anthracite.
If the first, second, third, fourth and fifth judging indexes can not directly judge the category of the variety of coal, the quality indexes of the fuel coal are comprehensively judged according to the first, second, third, fourth and fifth judging indexes, the number of the items of the fuel coal which accords with each category is obtained, and the category with the largest number of the items is the category of the fuel coal.
Based on the above-mentioned judgment rule, the category of the fuel coal a in the present embodiment is judged as follows:
the first evaluation index Vdaf:
Vdaf new type :7.63%, according to Vdaf 1 Label (C) And if the standard is less than or equal to 10 percent, judging that the variety is likely to be the anthracite.
Second evaluation index Ad:
Ad new type :11.90%, according to Ad 1 Label (C) And (3) judging whether the variety is the anthracite or the sintered anthracite according to the standard of less than or equal to 12.8 percent and less than or equal to 14.5 percent.
Third evaluation index Qgr, d:
Qgr,d new type :30.82MJ/kg, qgr d 1 Label (C) And the standard of not less than 28.0MJ/kg and not less than 30.0MJ/kg, and judging that the variety is possibly the blown bituminous coal, the sintered anthracite coal, the blown lean coal or the blown anthracite coal.
Fourth evaluation index St, d:
St,d new type :0.78%, conform to St, d 1 Label (C) And (3) judging whether the variety is the bituminous coal or the anthracite coal according to the standard of less than or equal to 0.85 percent.
Fifth evaluation index HGI:
HGI new type :88, conform to HGI 1 Label (C) And if the standard is more than or equal to 70, judging the variety as the anthracite.
Based on the above five criteria, an evaluation index (Qgr, d New type ) Meets the lean coal injection standard, and two evaluation indexes (Qgr, d New type St, d New type ) Meets the standard of the smoke-spraying coal and three evaluation indexes (Vdaf) New type 、Ad New type Qgr, d New type ) Meets the standard of sintered anthracite, five evaluation indexes (Vdaf New type 、Ad New type 、Qgr,d New type 、St,d New type HGI (hybrid gas chromatography-head chromatography) New type ) All meet the anthracite coal-spraying standard, so that the fuel coal A is determined to belong to the anthracite coal-spraying class.
The current price of the anthracite A is 1800 yuan/ton, and compared with the current price of the anthracite A reaching 1890 yuan/ton, the current price of the anthracite A has the price advantage of about 90 yuan/ton.
The on-site sampling quality index of the anthracite coal A is obtained and is shown in Table 3.
TABLE 3 quality index of anthracite A
Compared with the fuel coal technical standard (table 2),
ad:11.5 percent to less than or equal to 12.8 percent, meets the standard
St, d:0.73 percent to less than or equal to 0.85 percent, meets the standard
Vdaf:7.70 percent or less and 10 percent, meets the standard
Qgr, d:30.9MJ/kg is more than or equal to 29.0MJ/kg, meets the standard
HGI: 82. more than or equal to 70, meets the standard
Through the comparison and evaluation, all quality indexes of the anthracite A meet the quality standard of the anthracite entering the factory.
According to the sample quality evaluation and price, performing cost performance evaluation on the anthracite A conforming to the introduction flow, namely:
the ratio of the values η = quality composite score Q/price P;
wherein the quality composite score q=q Ash of ash +Q Sulfur (S) +Q Volatilizing +Q Fixing +Q Heat of the body +Q Grindability of +Q Water and its preparation method Setting an index weight, an evaluation reference value and an index fluctuation deduction according to the contribution of each quality index to the blast furnace production, wherein the index weight, the evaluation reference value and the index fluctuation deduction are shown in a table 4:
TABLE 4 quality index weights and withholding criteria
Index score = index weight* And (100+/- (reference value-actual value) index adding deduction), namely obtaining the quality scores of all indexes of the anthracite A:
Q ash of ash ＝20％*(100+(11％-11.5％)/1％*9)＝19.10；
Q Sulfur (S) ＝10％*(100+(0.8％-0.73％)/0.1％*4)＝10.28；
Q Volatilizing ＝15％*(100+(11％-7.7％)/1％*4)＝16.98；
Q Fixing ＝15％*(100-(75％-81.9％)/1％*3)＝18.11；
Q Heating value ＝20％*(100-(30MJ/kg-30.9MJ/kg)/0.5MJ/kg*3)＝21.08；
Q Grindability of ＝10％*(100-(70-82)/1*1)＝11.2；
Q Water and its preparation method ＝10％*(100+(10％-12.5％)/1％*5)＝8.75。
The quality comprehensive score of each index of the anthracite A is as follows:
Q A ＝Q ash of ash +Q Sulfur (S) +Q Volatilizing +Q Fixing +Q Heating value +Q Grindability of +Q Water and its preparation method ＝105.5；
Anthracite A performance price ratio eta A ＝Q A /P A ＝105.5/1800*100＝5.861。
Assuming that the quality comprehensive scores of various indexes of the existing anthracite B, C are calculated according to the method, the following steps are obtained:
η B ＝5.343；η C ＝5.461；
based on the measurement and calculation of the cost performance of the anthracite A, B, C, the cost performance of the anthracite A, B, C is further ordered, eta A ＞η B And eta A ＞η C The obtained fuel coal A has cost performance.
Based on the evaluation and sequencing of the cost performance of the anthracite, the optimal cost performance of the anthracite A is obtained, and the new resource is determined to be introduced as the blast furnace injection coal.
Based on the quality index of the anthracite A, the new resource anthracite A is obtained by combining with the existing same-class anthracite injection technical standard, the quality technical standard of the anthracite A in the factory accords with production practice, has operability, prevents the quality of the anthracite A in the factory from being unqualified for a long time due to too severe standard, influences the quality of the anthracite A in the factory to be ensured for delivery, and simultaneously prevents the quality of the anthracite A in the factory from being out of control due to too wide standard, thereby being unfavorable for production and use.
The quality technical standard of the A-stage is shown in Table 5:
TABLE 5 anthracite A technical Standard
After the anthracite A is introduced, a large-scale production test scheme is formulated, namely the total proportion of the anthracite A is unchanged, the proportion of the anthracite A is matched with 10 percent, the anthracite A is used for large-scale production, the large-scale production test condition is tracked, the quality condition of products is evaluated, the large-scale production is stable and smooth after the anthracite A is matched based on the large-scale production test tracking condition, abnormal conditions such as raw coal bin suspension, poor coal grinding effect, increased pebble coal, blast furnace blocking spray gun and the like do not occur, the qualified evaluation of the product quality is continuously carried out, and otherwise, the introduction flow is interrupted.
Obtaining the quality of the test product according to a mass production test, including ash Ad 1 Sulfur fraction St, d 1 Volatile Vdaf 1 Fixed carbon FCd 1 、MF 1 -100、MF 1 -200, moisture Mt 1 Etc.
TABLE 6 product quality Standard and test product quality
Mass production test product quality was evaluated according to table 6 above, namely:
Ad 1 :10.82％，Ad 2 label (C) 12% of that of Ad 1 ≤Ad 2 Label (C) Meets the standard;
St,d 1 :0.75％，St,d 2 label (C) 0.9% of the total weight of the product satisfies St, d 1 ≤St,d 2 Label (C) Meets the standard;
Vdaf 1 :20.16％，Vdaf 2 label (C) 23% and meet Vdaf 1 ≤Vdaf 2 Label (C) Meets the standard;
Mt 1 :1.0％，Mt 2 label (C) 1.5 percent, meets Mt 1 ≤Mt 2 Label (C) Meets the standard;
FCdaf 1 :79.84％，FCdaf 2 label (C) 77% of 77% meets FCdaf 1 ≥FCdaf 2 Label (C) Meets the standard;
MF 1 -100:96.8％，MF 2 label (C) -100:95%, meeting the MF 1 -100≥MF 2 Label (C) -100, complying with a standard;
MF 1 -200:75.7％，MF 2 label (C) -200:75%, meeting MF 1 -200≥MF 2 Label (C) -200, meeting a standard;
according to the comparison and evaluation, after the anthracite A is matched, all quality evaluation indexes of the product accord with various evaluation standards, the quality of the test product accords with the quality standard, the anthracite A is evaluated as qualified new resource coal, and the new resource introduction flow of the anthracite A is ended.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (7)
1. The method for evaluating the introduction of new coal resources for blast furnace injection is characterized by comprising the following steps:
s1, acquiring new resource information of coal for blast furnace injection; the new resource information comprises a production place, a quality index and a factory price; the quality index comprises ash Ad New type Sulfur fraction St, d New type Volatilize and volatilizeDivided Vdaf New type Fixed carbon FCd New type Heat value Qgr, d New type Hardward abradable HGI New type And moisture Mt New type ；
S2, judging variety types of new resources according to the quality index and the fuel coal technical standard; the variety category comprises anthracite coal, bituminous coal, lean coal and sintered anthracite coal;
s21, prioritizing the judging indexes; the evaluation indexes comprise Vdaf, ad, qgr, d, st, d and HGI, and the first evaluation index, the second evaluation index, the third evaluation index, the fourth evaluation index and the fifth evaluation index are sequentially corresponding to each other according to the sequence;
s22, comparing the quality index with the first judging index, and judging the variety type of the new resource;
s23, if the previous-stage judging index does not judge the variety type of the resource, adding the next-stage judging index according to the priority sequence on the original basis to carry out comprehensive judgment until judging the variety type of the resource;
s3, based on variety types, obtaining the current-period to-plant ton price a of the new resource, and making a difference from the current-period to-plant ton price b of the existing anthracite, so as to meet the requirement of c=a-b; if c is less than 0, the new resource has price advantage; if c is more than or equal to 0, the new resource does not have price advantage, and the introduction flow is terminated;
s4, acquiring a field sampling sample of the new resource, comparing the field sampling sample with quality standards of corresponding categories in fuel coal technical standards, and judging the quality of the sample, wherein the method comprises the following steps: judging Ad A ≤Ad 1 Label (C) ，St,d A ≤St,d 1 Label (C) ，Vdaf A ≤Vdaf 1 Label (C) ，Qgr,d A ≥Qgr,d 1 Label (C) ，HGI A ≥HGI 1 Label (C) If the sample quality meets the requirement, the introduction flow is ended;
s5, performing cost performance evaluation on the new resource based on the sample quality evaluation and the price; measuring and calculating the cost performance of at least two types of currently used fuel coal in the same category, and sequencing the cost performance; if the cost performance sequence of the new resource is the first, the new resource is determined to be introduced as the coal for blast furnace injection, otherwise, the introduction flow is terminated.
2. The evaluation method for introducing new resources of coal for blast furnace injection according to claim 1, wherein the evaluation method comprises the following steps: s6, formulating and implementing a mass production test scheme, tracking the mass production test condition, and evaluating the product quality condition; if the mass production test has abnormal conditions, stopping the test, and ending the introduction flow; the abnormal conditions comprise suspended materials of the raw coal bin, poor coal grinding effect, increased stone coal and blockage of the blast furnace spray gun by coal dust.
3. The evaluation method for introducing new resources of coal for blast furnace injection according to claim 2, characterized by comprising the steps of: in the step S6, the quality of the product of the mass production test is evaluated, and if the quality of the product meets the requirements that Ad1 is less than or equal to 12%, st, d1 is less than or equal to 0.9%, vdaf1 is less than or equal to 23%, mt1 is less than or equal to 1.5%, FCdaf1 is more than or equal to 77%, MF1-100 is more than or equal to 95% and MF1-200 is more than or equal to 75%, the mass production test meets the quality standard of the product; otherwise, the product quality standard is not met.
4. The evaluation method for introducing new resources of coal for blast furnace injection according to claim 1, wherein the evaluation method comprises the following steps: in S21, the fuel coal technical standards are as follows:
anthracite coal is sprayed: ad is less than or equal to 12.8 percent; st, d is less than or equal to 0.85%; vdaf is less than or equal to 10 percent; qgr, d is more than or equal to 30.0MJ/kg; HGI is more than or equal to 70; mt is less than or equal to 13%;
spraying bituminous coal: ad is less than or equal to 10.8 percent; st, d is less than or equal to 0.85%; vdaf is less than or equal to 35 percent; qgr, d is more than or equal to 28.0MJ/kg; HGI is more than or equal to 60; mt is less than or equal to 13%;
lean coal is blown: ad is less than or equal to 11.8 percent; st, d is less than or equal to 0.75%; vdaf is less than or equal to 18 percent; qgr, d is more than or equal to 30.0MJ/kg; HGI is more than or equal to 65; mt is less than or equal to 13%;
sintering anthracite: ad is less than or equal to 14.5 percent; st, d is less than or equal to 0.75%; vdaf is less than or equal to 10 percent; qgr, d is more than or equal to 29.0MJ/kg; mt is less than or equal to 10 percent;
wherein Ad is ash, st, d sulfur, vdaf volatile, qgr, d heat value, HGI Hardward grindable, mt is moisture.
5. The evaluation method for introducing new resources of coal for blast furnace injection according to claim 1, wherein the evaluation method comprises the following steps: in the step S23, if the variety class of the resource is not judged after the fifth judging index is added, comprehensive judgment is performed to obtain the number of items of the new resource conforming to each class; the variety category which accords with the most item is the category variety category of the new resource.
6. The evaluation method for introducing new resources of coal for blast furnace injection according to claim 1, wherein the evaluation method comprises the following steps: in the step S5, calculating a quality score of each index is further included:
Q ash of ash ＝20％*[100+(Ad Datum -Ad A )/1％*9]；
Q Sulfur (S) ＝10％*[100+(St,d Datum -St,d A )/0.1％*4]；
Q Volatilizing ＝15％*[100+(Vdaf Datum -Vdaf A )/1％*4]；
Q Fixing ＝15％*[100-(FCd Datum -FCd A )/1％*3]；
Q Heating value ＝20％*[100-(Qgr,d Datum -Qgr,d A )/0.5MJ/kg*3]；
Q Grindability of ＝10％*[100-(HGI Datum -HGI A )/1*1]；
Q Water and its preparation method ＝10％*[100+(Mt Datum -Mt A )/1％*5]；
Wherein Q is Ash of ash 、Q Sulfur (S) 、Q Volatilizing 、Q Fixing 、Q Heat of the body 、Q Grindability of And Q Water and its preparation method Mass scores for ash, sulfur, volatiles, fixed carbon, heating value, halbach grindability, and moisture, respectively; ad (Ad) Datum 、St,d Datum 、Vdaf Datum 、FCd Datum 、Qgr,d Datum 、HGI Datum And Mt Datum Respectively the reference values of various indexes; ad (Ad) A 、St,d A 、Vdaf A 、FCd A 、Qgr,d A 、HGI A And Mt A Respectively, the sampled values of each index.
7. The evaluation method for introducing new resources of coal for blast furnace injection according to claim 6, wherein the method comprises the steps of: the cost performance calculation method comprises the following steps:
η＝Q/P；
Q＝Q ash of ash +Q Sulfur (S) +Q Volatilizing +Q Fixing +Q Heat of the body +Q Grindability of +Q Water and its preparation method ；
Wherein eta is cost performance, Q is quality comprehensive score, and P is price per ton.
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