CN103450916B - A kind of method diagnosing fluctuation reason of quality of coke - Google Patents
A kind of method diagnosing fluctuation reason of quality of coke Download PDFInfo
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- CN103450916B CN103450916B CN201310321769.9A CN201310321769A CN103450916B CN 103450916 B CN103450916 B CN 103450916B CN 201310321769 A CN201310321769 A CN 201310321769A CN 103450916 B CN103450916 B CN 103450916B
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Abstract
The invention belongs to coal blending field, specifically a kind of method diagnosing fluctuation reason of quality of coke.STRENGTH ON COKE measures, if in the granular size of coke and coke in contained ash content any one or two kinds not in the scope determined, vitrinite reflectance detection is carried out in STRENGTH ON COKE coal blending used, it is reflectivity range that result is added up at X-coordinate, on the vitrinite reflectance distribution plan of ordinate zou mass percent of overall coal blending shared by single coal, thus determine the actual coal kind of this coal blending and the substantial proportion shared by often kind of coal, the setting ratio of the substantial proportion shared by more often kind of coal and coal blending process, thus coal blending process setting ratio is adjusted.The coal blending generating the coke of specifying index can be configured by the present invention, decrease the waste of the energy and save coal blending cost.
Description
Technical field
The invention belongs to coal blending field, specifically a kind of method diagnosing fluctuation reason of quality of coke.
Background technology
Stablizing of coke quality is most important to the direct motion of blast furnace, therefore each coal chemical enterprise generally all can Coke Quality setup control index, owing to there is coke quality fluctuation situation unavoidably in actual production, at Coke Quality cause of fluctuation not very clearly in situation, for reducing coke quality fluctuation, enterprise can reach the object of coke quality steady by the proportioning increasing high-quality high price coking coal, thus causes the rising of coal blending cost and the waste of high-quality resource.
Summary of the invention
Technical problem to be solved by this invention is: in coke production, how to analyze reason in coke quality fluctuation situation, thus the coal blending that configuration place is suitable.
The technical solution adopted in the present invention is: a kind of method diagnosing fluctuation reason of quality of coke, in the granular size of STRENGTH ON COKE and coke, contained ash content measures, if in the granular size of coke and coke in contained ash content any one or two kinds not in the scope determined, then vitrinite reflectance detection is carried out in STRENGTH ON COKE coal blending used, it is reflectivity range that result is added up at X-coordinate, on the vitrinite reflectance distribution plan of ordinate zou mass percent of overall coal blending shared by single coal, thus determine the actual coal kind of this coal blending and the substantial proportion shared by often kind of coal, the setting ratio of the substantial proportion shared by more often kind of coal and coal blending process, thus coal blending process setting ratio is adjusted.
The invention has the beneficial effects as follows: the coal blending generating the coke of specifying index can be configured by the present invention, decrease the waste of the energy and save coal blending cost.
Accompanying drawing explanation
Fig. 1 is the coal blending vitrinite reflectance distribution schematic diagram occurring not meeting coke requirement of the present invention;
Fig. 2 is 1/3 coking coal vitrinite reflectance distribution schematic diagram;
Fig. 3 pungently puts rich coal vitrinite reflectance distribution schematic diagram;
Fig. 4 is wide source rich coal vitrinite reflectance distribution schematic diagram;
Fig. 5 is the coal blending vitrinite reflectance distribution schematic diagram after adjustment after coal blending.
Embodiment
On February 27th, 2013,0-8 point started, there is fluctuation in continuous 5 the order of classes or grades at school coke quality indexs of Shanxi Taigang Stainless Steel Co., Ltd. Coking Factory, ash, M10(M10 represent coke size diameter and are greater than 10mm) raise, M40(M40 represents coke size diameter and is greater than 40mm) decline, coke lumpiness diminishes, and specific targets are as shown in the table.
Coke quality index (table 1)
Carry out list to the various problems of quality fluctuating period coke, and analyze possible reason, result is as shown in the table:
For the reason of Blending, carry out vitrinite reflectance selective examination to mixed coal on the 27th, result shows low rank coal content in loading coal on the 27th to be increased, and the coal 3% containing bottle coal metamorphic grade, result as shown in Figure 1.
Vitrinite reflectance distribution schematic diagram figure illustrates: it is interval that figure X-coordinate numerical value represents this coal vitrinite reflectance numeric distribution, and vitrinite reflectance numerical value is larger, and represent this coal metamorphic grade higher, numerical value is less, represents this coal metamorphic grade lower; Figure ordinate zou represents the per-cent accounting for whole distributed area between scale area, Y value corresponding to each histogram represents the per-cent accounting for whole distributed area between this scale area, histogram place, if what survey is single grade coal, between each scale area, histogram place, percentage numerical value is all indicated in above this histogram.
Following table is the analysis to Fig. 1:
Enter under factory's coal detection display is the prerequisite of single grade coal in each coal, bottle coal may be generally by blending a small amount of in the close coal (as 1/3 coking coal, rich coal) of metamorphic grade with it, therefore coal petrography Indexs measure is carried out to the coal of 1/3 coking coal, rich coal iso-metamorphism degree, result shows, containing bottle coal in 1/3 coking coal, content is 3%; Pungent rich coal of putting (is distinguished the coal originated in different colliery, thus the name oneself risen) in containing the coal 50.0% of 1/3 coking coal metamorphic grade, wide source rich coal (distinguish the coal originated in different colliery, thus the name oneself risen) coal petrography index is without exception, the results are shown in lower Fig. 2.The standard using vitrinite reflectance to identify single grade coal is as shown in the table:
Fig. 2 is 1/3 coking coal vitrinite reflectance distribution plan, and its analytical results sees the following form:
| Reflectivity range | Possible coal | Portion (%) | Mean value | Standard deviation |
| 0.55-0.70 | Bottle coal | 3 | 0.577 | 0.028 |
| ＞0.70 | 1/3 coking coal | 97 | 0.800 | 0.065 |
Fig. 3 pungently puts rich coal vitrinite reflectance distribution plan, and its analytical results sees the following form:
| Reflectivity range | Possible coal | Portion (%) | Mean value | Standard deviation |
| 0.70-0.85 | 1/3 coking coal | 50 | 0.0.814 | 0.079 |
| 0.85-1.20 | Rich coal | 50 | 0.950 | 0.092 |
Fig. 4 is wide source rich coal vitrinite reflectance distribution plan, and its analytical results sees the following form:
| Reflectivity range | Possible coal | Portion (%) | Mean value | Standard deviation |
| 0.85-1.20 | Rich coal | 100 | 0.990 | 0.089 |
According to detected result, determining is because low rank coal (i.e. bottle coal and 1/3 coking coal) increases the coke quality fluctuation caused, and takes measure targetedly for this reason:
1, carry out blending ratio adjustment, stop joining and put rich coal containing the pungent of low rank coal, reduce the proportioning of 1/3 coking coal containing bottle coal, appropriate increase kalimeris rich coal (coal originated in different colliery is distinguished, thus the name oneself risen) proportioning.
2,1/3 coking coal, rich coal and mixed coal coal petrography index spot-check and continue to follow the tracks of, supervision proportioning implementation status and mixed coal coal varitation situation.
Fig. 5 is the coal vitrinite reflectance distribution plan after have adjusted coal blending, and its analytical results sees the following form:
| Reflectivity range | Possible coal | Portion (%) | Mean value | Standard deviation |
| 0.70-0.85 | 1/3 coking coal | 6 | 0.773 | 0.051 |
| 0.85-1.20 | Rich coal | 27 | 1.024 | 0.068 |
| 1.20-1.69 | Coking coal | 57 | 1.333 | 0.122 |
| 1.69-1.90 | Lean coal | 10 | 1.751 | 0.036 |
For the higher reason of ash content, take the proportioning reducing the higher coal of ash content, increase the measure of the coal proportioning of low ash.
By taking above-mentioned specific aim measure, coke quality takes a turn for the better rapidly, recovers normal to order of classes or grades at school indices during 16-24 on the 28th in February.Specific targets are listed in following table:
| Date | Order of classes or grades at school | Ash content | M40 | M10 |
| Enterprise's control criterion | ≤12.30 | ≥89.0 | ≤5.5 | |
| 2013-2-28 | 16-24 | 11.94 | 89.5 | 5.4 |
Present method is when carbonization condition is substantially constant, effectively can diagnose causing the reason of coke quality fluctuation to carry out science, thus adopt an effective measure for reason, avoid excessively allocating the high coking coal of valency of fine quality into, both ensure that the stable of coke quality, and also make Blending more reasonable.
Claims (1)
1. diagnose the method for fluctuation reason of quality of coke for one kind, it is characterized in that: in the granular size of STRENGTH ON COKE and coke, contained ash content measures, if in the granular size of coke and coke in contained ash content any one or two kinds not in the scope determined, then vitrinite reflectance detection is carried out in STRENGTH ON COKE coal blending used, it is reflectivity range that result is added up at X-coordinate, on the vitrinite reflectance distribution plan of ordinate zou mass percent of overall coal blending shared by single coal, thus determine the actual coal kind of this coal blending and the substantial proportion shared by often kind of coal, the setting ratio of the substantial proportion shared by more often kind of coal and coal blending process, thus coal blending process setting ratio is adjusted.
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| CN104449778B (en) * | 2014-10-24 | 2016-08-24 | 山西太钢不锈钢股份有限公司 | A kind of method that integrated use coal petrography index carries out the exploitation of coal source |
| CN107957484A (en) * | 2016-10-18 | 2018-04-24 | 上海梅山钢铁股份有限公司 | A kind of detection method of coke reflectivity |
| CN111592901B (en) * | 2020-06-03 | 2021-08-17 | 河北中煤旭阳能源有限公司 | Method for improving fineness and granularity composition of tamping coke blended coal |
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| JPS58194980A (en) * | 1982-05-07 | 1983-11-14 | Sumitomo Metal Ind Ltd | Manufacture of blast furnace coke |
| CN1049372A (en) * | 1990-09-29 | 1991-02-20 | 北京市燃气煤化工研究所 | A kind of blending method of coking |
| CN101081989B (en) * | 2007-06-29 | 2010-05-19 | 武汉钢铁(集团)公司 | Coal coking blending method |
| CN101661026B (en) * | 2008-08-30 | 2013-04-24 | 中钢集团鞍山热能研究院有限公司 | Method for predicting mechanical strength and thermal properties of coke |
| CN102559227B (en) * | 2010-12-10 | 2014-03-19 | 上海梅山钢铁股份有限公司 | Method for coal blending coking through utilizing Gieseler fluidity index |
| CN102010734A (en) * | 2010-12-10 | 2011-04-13 | 武汉钢铁(集团)公司 | Coal blending method for controlling coal as fired dilatation of large-scale coke oven with wide coking chamber |
| RU2461602C1 (en) * | 2011-05-20 | 2012-09-20 | Открытое акционерное общество "Северсталь" (ОАО "Северсталь") | Method for charge forming for furnace coke obtaining |
| CN102890144B (en) * | 2012-10-22 | 2014-11-05 | 辽宁科技大学 | Method for predicting coke quality through nonlinear optimization coal blending based on coal rock vitrinite total reflectance |
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