CN102212379B - Coal blending method based on coal quality of fat coal - Google Patents
Coal blending method based on coal quality of fat coal Download PDFInfo
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- CN102212379B CN102212379B CN 201110110743 CN201110110743A CN102212379B CN 102212379 B CN102212379 B CN 102212379B CN 201110110743 CN201110110743 CN 201110110743 CN 201110110743 A CN201110110743 A CN 201110110743A CN 102212379 B CN102212379 B CN 102212379B
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Abstract
The invention discloses a coal blending method based on coal quality of No.36 fat coal. The method comprises the following steps: firstly, acquiring the percentages of the average maximum reflectivity of the vitrinite of the No.36 fat coal and the fine grain mosaic structure of the fat coal, wherein when the percentage of the average maximum reflectivity of the vitrinite of the No.36 fat coal is less than 0.90% and the percentage of the fine grain mosaic structure is not less than 55%, the No.36 fat coal is used as No.36 class II fat coal, otherwise, the No.36 fat coal is used as No.36 class I fat coal; and then blending the No.36 class II fat coal and the No.36 class I fat coal with other coals such as air fertilizer coal and the like, wherein when in coal blending, the weight sum of No.36 class II fat coal and No.36 class I fat coal accounts for less than 15% of weight of blended coal for coking, the weight sum of air fertilizer coal and No.36 fat coal accounts for 15%-25% of the weight of the blended coal for coking. In the method, the coal quality condition of the No.36 fat coal is fully considered in the coal blending process, and the quality of the blended coke is good.
Description
Technical field
The present invention relates to the coke making and coal blending technical field, particularly a kind of method of carrying out coal blending according to the characteristic of No. 36, rich coal.
Background technology
Now, coking industry coking is mainly cooperated according to different proportion by gas-fat coal, rich coal, 1/3 coking coal, coking coal, lean coal etc. with mixed coal and forms.Rich coal is for No. 36 coking with the main coal of using of rich coal, is subjected to factor affecting such as producing coal ground, metamorphic grade, and No. 36 ature of coal difference of different rich coal are bigger, namely excellent, the degree of inferiority is different.But each coke-oven plant deposits the coking coal that coal yard all will belong to No. 36, rich coal and is placed on same a pile, the delivery that No. 36, rich coal, transportation, arrival are subjected to condition restriction such as coal supply side, railway, therefore, the ratio that excellent, the inferior rich coal of different times is measured for No. 36 is uncontrollable, causes the ature of coal instability of No. 36, rich coal.No. 36, rich coal is higher in the adapted amount of each coke-oven plant, and substantially all more than 15%, the instability of its ature of coal finally causes the fluctuation of coke quality.Because prior art is ignored the quality quality of No. 36, rich coal and directly carried out coal blending, the coke quality fluctuation of therefore allotting is bigger, the direct motion of blast furnace during final influence ironmaking is produced.
Therefore, be necessary to provide a kind of improved blending method to overcome the defective of prior art.
Summary of the invention
The purpose of this invention is to provide a kind of blending method based on No. 36 atures of coal of rich coal, take into full account the ature of coal situation of No. 36, rich coal in the coal blending process, the coke quality steady of allotting is good.
To achieve these goals, the invention provides a kind of blending method based on No. 36 atures of coal of rich coal, comprise the steps:
Rich coal is taken a sample for No. 36, getting coal sample is carried out division, oven dry, sample preparation processing;
The back granularity is made No. 36, rich coal less than the coal sample of 1mm fine coal mating plate is handled in sample preparation, granularity is made the coke breeze mating plate less than the coal sample of 1.5mm, random reflectance of vitrinite on the polished surface of measuring coal on the fine coal mating plate under the microscope oil immersion objective to be to obtain the average maximum reflectivity of vitrinite, measures particulate mosaic texture number percent in the charred coal organization on the polished surface of coke on the coke breeze mating plate under the microscope oil immersion objective;
When the average maximum reflectivity of vitrinite of No. 36, rich coal less than 0.90%, and particulate mosaic texture number percent is not less than at 55% o'clock, with No. 36, described rich coal as No. 36, two class rich coal, otherwise with No. 36, described rich coal as No. 36, a class rich coal;
No. 36, two class rich coal, No. 36, a class rich coal and gas-fat coal, 1/3 coking coal, coking coal, lean coal are carried out coal blending, wherein No. 36, two class rich coal and gas-fat coal sum account for coking with the ratio of mixed coal less than 15%, the summation that No. 36, gas-fat coal and rich coal accounts for coking with 15% to 25% of mixed coal ratio.
Compared with prior art, the blending method that the present invention is based on No. 36 atures of coal of rich coal is distinguished the rich coal of different atures of coal in No. 36, the rich coal for No. 36, be divided into No. 36, No. 36, a class rich coal and two class rich coal, because No. 36, No. 36, a class rich coal and two class rich coal are different to the influence of the ature of coal of mixed coal, this method is controlled the adapted amount of No. 36, No. 36, a class rich coal and two class rich coal in coal-blending coking, stablizing of the coke quality of allotting like this, coke quality is good.
By following description also by reference to the accompanying drawings, it is more clear that the present invention will become, and these accompanying drawings are used for explaining embodiments of the invention.
Description of drawings
Fig. 1 is the process flow diagram based on the blending method of No. 36 atures of coal of rich coal.
Embodiment
With reference now to accompanying drawing, describe embodiments of the invention, the similar elements label represents similar elements in the accompanying drawing.
As Fig. 1, the blending method that the present invention is based on No. 36 atures of coal of rich coal comprises the steps:
Step S1 adopts the method for layouting at random that the rich coal in the coking plant area train cover is taken a sample for No. 36, getting coal sample is carried out division, oven dry, sample preparation handle;
Step S2, the back granularity is handled in sample preparation made the fine coal mating plate less than the coal sample of 1mm by joining glue, grinding, polishing process, random reflectance of vitrinite on the polished surface of measuring coal on the fine coal mating plate under the microscope oil immersion objective obtains the average maximum reflectivity of vitrinite by conversion then
Step S3, the back granularity is handled in sample preparation to be made the coke breeze mating plate of No. 36, rich coal less than the coal sample of 1.5mm (the making principle of coke breeze mating plate is 201010112106.2 with reference to number of patent application, denomination of invention is that a kind of charred coal organization of measuring is with the method for refining of coke), under the microscope oil immersion objective, measure particulate mosaic texture number percent X in the charred coal organization on the polished surface of coke on the coke breeze mating plate then;
Step S4 is when the average maximum reflectivity of vitrinite of No. 36, rich coal
And particulate mosaic texture number percent X 〉=55% o'clock, with No. 36, described rich coal as No. 36, two class rich coal; Otherwise (the average maximum reflectivity of the vitrinite that No. 36, rich coal
Or particulate mosaic texture number percent X＜55%), with No. 36, described rich coal as No. 36, a class rich coal;
Step S5, No. 36, two class rich coal, No. 36, a class rich coal and gas-fat coal, 1/3 coking coal, coking coal, lean coal are carried out coal blending, wherein No. 36, two class rich coal and gas-fat coal sum account for coking with the ratio of mixed coal less than 15%, the summation of rich coal No. 36 (comprising No. 36, No. 36, a class rich coal and two class rich coal) and gas-fat coal accounts for 15%～25% of coking usefulness mixed coal ratio.
By experiment this blending method is verified now.The main detection index of the coke quality of allotting comprises post reaction strength of coke.The process that coke quality detects is: take by weighing the coke specimen of certain mass, in the time of 1100 ℃ ± 5 ℃ and behind the carbon dioxide reaction 2h, represent coke reactivity (CRI) with the percentage of coke quality loss; Reaction back coke after I type drum test, is represented post reaction strength of coke (CSR) with the massfraction that accounts for reaction back coke greater than 10mm grade coke.In the detection of CSR, the reaction time of coke and carbon dioxide is 1h, and other conditions are identical with production coke testing conditions.The CSR data are more big, and the CRI data are more little, and coke quality is more good.Rule of thumb, laboratory coke CSR should just can reach first-class metallurgical coke charcoal CSR index request more than 65.0%, and when CSR＞71%, coke is high-quality more.
At first verify No. 36, No. 36, a class rich coal and two class rich coal respectively with other coal coal blendings after the quality of the coke that obtains, the adapted ratio of gas-fat coal is 0 (not having the participation of gas-fat coal during coal blending) in this experiment coal blending.
Table 1
As shown in Table 1, under the identical situation of rich coal, 1/3 coking coal, coking coal and lean coal adapted ratio each other, because the CSR value of the coke that the CSR value of the coke allotted of coal blending scheme (adopting two class rich coal No. 36) of first row is allotted less than the second coal blending scheme (adopting a class rich coal No. 36) of going in the table in the table, therefore the coke quality of allotting of No. 36, the coke ratio one class rich coal allotted for No. 36 of two class rich coal is poor, and difference of them is bigger.Therefore ignore the quality quality of No. 36, rich coal in the prior art and directly carry out coal blending, the coke quality of allotting fluctuation is bigger.
Verify this blending method now.No. 36, one class rich coal is mixed for No. 36 with two class rich coal, obtain coke with other coal coal blendings then, wherein the average maximum reflectivity of vitrinite of No. 36, No. 36, a class rich coal and two class rich coal
X still satisfies table 1 with particulate mosaic texture number percent.
Table 2
As shown in Table 2, for coal blending scheme 1 and coal blending scheme 2, in the range of control of toatl proportion in this method of rich coal in the coal blending scheme 1 No. 36 (comprising No. 36, No. 36, a class rich coal and two class rich coal) and gas-fat coal, and when the toatl proportion of rich coal No. 36 (comprising No. 36, No. 36, a class rich coal and two class rich coal) and gas-fat coal is not in the range of control of this method in the coal blending scheme 2, the CSR value of the coke that the CSR value of the coke that coal blending scheme 1 is allotted is allotted greater than coal blending scheme 2.Therefore, can reach a conclusion: obtain the measured coke of matter, at first should be with the toatl proportion control of No. 36, rich coal and gas-fat coal in the scope of this method.
In addition, for coal blending scheme 3, coal blending scheme 4, when the toatl proportion of rich coal in the toatl proportion of rich coal in the coal blending scheme 3 No. 36 (comprising No. 36, No. 36, a class rich coal and two class rich coal) and gas-fat coal and the coal blending scheme 4 No. 36 (comprising No. 36, No. 36, a class rich coal and two class rich coal) and gas-fat coal is all in the range of control in this method, at 1/3 coking coal, the CSR value of the coke that the toatl proportion of No. 36, rich coal and gas-fat coal all under the identical situation in the toatl proportion of No. 36, rich coal and gas-fat coal and the coal blending scheme 4 in coking coal and the coal blending scheme 3 identical with lean coal adapted ratio each other, the CSR value of the coke that coal blending scheme 3 No. 36, two class rich coal (with the ratio of gas-fat coal with in the range of control of this method) is allotted are allotted greater than coal blending scheme 4 No. 36, two class rich coal (with the ratio of gas-fat coal with not in the range of control of this method).Therefore, can reach a conclusion: obtain the measured coke of matter, not only should be with the toatl proportion control of No. 36, rich coal and gas-fat coal in the scope of this method, and should and control in the scope of this method the ratio of No. 36, two class rich coal and gas-fat coal, otherwise the coke quality of allotting is poor.
As shown from the above technical solution, the blending method that the present invention is based on No. 36 atures of coal of rich coal is distinguished coal piling No. 36 with the rich coal of different atures of coal in No. 36, the rich coal, and in coal-blending coking the adapted amount of No. 36, control No. 36, one class rich coal and two class rich coal, the coke quality steady of allotting, coke quality is good.
Above invention has been described in conjunction with most preferred embodiment, but the present invention is not limited to the embodiment of above announcement, and should contain various modification, equivalent combinations of carrying out according to essence of the present invention.
Claims (1)
1. the blending method based on No. 36 atures of coal of rich coal is characterized in that, comprises the steps:
Step S1 adopts the method for layouting at random that the rich coal in the coking plant area train cover is taken a sample for No. 36, getting coal sample is carried out division, oven dry, sample preparation handle;
Step S2, the back granularity is handled in sample preparation made the fine coal mating plate less than the coal sample of 1mm by joining glue, grinding, polishing process, random reflectance of vitrinite on the polished surface of measuring coal on the fine coal mating plate under the microscope oil immersion objective obtains the average maximum reflectivity of vitrinite by conversion then
Max;
Step S3 handles the back granularity with sample preparation and makes the coke breeze mating plate of No. 36, rich coal less than the coal sample of 1.5mm, measures particulate mosaic texture number percent X in the charred coal organization on the polished surface of coke on the coke breeze mating plate then under the microscope oil immersion objective;
Step S4 is when the average maximum reflectivity of vitrinite of No. 36, rich coal
Max＜0.90%, and particulate mosaic texture number percent X 〉=55% o'clock, with No. 36, described rich coal as No. 36, two class rich coal; Otherwise, with No. 36, described rich coal as No. 36, a class rich coal;
Step S5, No. 36, two class rich coal, No. 36, a class rich coal and gas-fat coal, 1/3 coking coal, coking coal, lean coal are carried out coal blending, wherein No. 36, two class rich coal and gas-fat coal sum account for coking with the ratio of mixed coal less than 15%, the summation of No. 36, rich coal and gas-fat coal accounts for coking with 15%～25% of mixed coal ratio.
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| CN102618311B (en) * | 2012-04-18 | 2014-01-22 | 武汉钢铁(集团)公司 | Coking and coal blending method with participation of fat coal |
| CN104316528B (en) * | 2014-11-13 | 2016-09-21 | 武汉钢铁(集团)公司 | The discriminating of special genetic coal and application method |
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