CN102863980B - Proportioning method for high-expansion low-flowing coking coal - Google Patents
Proportioning method for high-expansion low-flowing coking coal Download PDFInfo
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- CN102863980B CN102863980B CN201210389164.9A CN201210389164A CN102863980B CN 102863980 B CN102863980 B CN 102863980B CN 201210389164 A CN201210389164 A CN 201210389164A CN 102863980 B CN102863980 B CN 102863980B
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Abstract
The invention discloses a proportioning method for high-expansion low-flowing coking coal with the Aoya expansion degree b to be 80-150% and the maximum fluidity MF to be 10,000ddpm. The method comprises the following steps: (1) measuring fluidity of the high-expansion low-flowing coking coal to obtain the largest fluidity; and measuring the Aoya expansion degree and a coking coarse grain mosaic structure of the high-expansion low-flowing coking coal; (2) determining the Aoya expansion degree, the coking coarse grain mosaic structure and the proportioning quantity of enterprise standard coking coal; and (3) calculating the maximum proportioning quantity of the high-expansion low-flowing coking coal according to a formula Xmax=Xmax<excellent>*(1-k1*deltaCM/Cm<excellent>-k2*detlab/b<excellent>). The commonly used high-quality coking coal of enterprises serves as the standard coking coal, the proportioning quantity of the high-expansion low-flowing coking coal and the proportioning quantity of the standard coking coal are unified in one formula by internal relations of respective coking coarse grain mosaic structures and Aoya expansion degrees, the proportioning proportional range of the high-expansion low-flowing coking coal can be calculated conveniently through the proportioning quantity of the known commonly-used high-quality coking coal, and accordingly the high-expansion low-flowing coking coal is used reasonably.
Description
Technical field
The invention belongs to Coking Coal Blending Technology field, be specifically related to the application method of the low mobile coking coal of a kind of high expansion.
Background technology
The rheological of coking coal, swelling property are the important factors that affects coke quality, in coking coal coking process there is certain rheology and expansion in plastic mass, can promote coal grain around and mutually be subjected to displacement and contact, fill the space between coal grain, be beneficial to and improve coke quality.Different the coal rheology of single kind and expansion characteristics are different, are also different in the effect of coal-blending coking performance.Strong cohesive property coking coal rheological, swelling property show as: the coking coal swelling property that rheological is high is high, but the high coking coal mobility of swelling property may not be high.How the adapted ratio that the sub-turgidity b of Austria is 80 ~ 150%, the height of maximum fluidity MF<10000ddpm expands low mobile coking coal is controlled, still do not have at present method to follow, in the time of coke making and coal blending, there is random, blindness in the adapted of the high low mobile coking coal that expands, coking gained coke quality is stable not.
Summary of the invention
The application method of technical problem to be solved by this invention is to provide that a kind of sub-turgidity b difficult to understand is 80 ~ 150%, the height of maximum fluidity MF<10000ddpm expands low mobile coking coal, rationally to control the adapted ratio of the high low mobile coking coal that expands.
For solving the problems of the technologies described above, the technical solution used in the present invention comprises the steps:.
1) degree of mobilization of measuring the high low mobile coking coal that expands is to obtain maximum fluidity; And measure its sub-turgidity difficult to understand and coking coarse grain pattern structure;
2) determine the sub-turgidity of Austria, coking coarse grain pattern structure and the adapted amount of the conventional high-quality coking coal of enterprise, using high-quality coking coal conventional enterprise as benchmark coking coal;
3) according to the maximum adapted amount of the high low mobile coking coal that expands of following formula (1) calculating:
Xmax is the maximum adapted amount of the high low mobile coking coal that expands;
Xmax
excellentfor the maximum adapted amount of benchmark coking coal;
△ CM is that the coking coarse grain pattern structure of high expand low mobile coking coal and benchmark coking coal is poor;
CM
excellentfor the coking coarse grain pattern structure of benchmark coking coal;
△ b is that the low mobile coking coal of high expansion coal and benchmark coking coal sub-turgidity difficult to understand is poor;
B
excellentfor the sub-turgidity of Austria of benchmark coking coal;
K
1, k
2be expressed as the correction factor of burnt coarse grain pattern structure, sub-turgidity impact difficult to understand.
Because the low mobile coking coal of height expansion is mainly that plastic mass is abundant, but the slightly high coking coal of metamorphic grade, rich coal as lower in volatile matter, and the higher coking coal of Y value.Because of its degree of mobilization not high, turgidity is high, in coal blending, main rising regulates expansion character and certain Thermal Properties of Coke supporting role is provided, similar with coking coal role, and all there has been the adapted proportional range of finding out conventional high-quality coking coal in each enterprise, the present invention is taking the conventional high-quality coking coal of enterprise as benchmark coking coal, in view of coking coal ature of coal is playing adjusting expansion and is providing Thermal Properties of Coke supporting role affected by coking coarse grain pattern structure and Ao Ya turgidity, the expand adapted amount of low mobile coking coal adapted amount and benchmark coking coal of height is unified in to a formula the inside by the inner link of coking coarse grain pattern structure and Ao Ya turgidity size separately, can be by the adapted amount of known conventional high-quality coking coal, calculate easily the adapted proportional range of the high low mobile coking coal that expands, thereby realize the reasonable use of the high low mobile coking coal that expands.
Embodiment
Below in conjunction with embodiment, the present invention is further detailed explanation.
The present invention is high, and the application method that expands low mobile coking coal comprises the steps:
1) degree of mobilization of the low mobile coking coal of measuring that the sub-turgidity b of stand-by Austria is 80 ~ 150%, the height of maximum fluidity MF<10000ddpm expands is to obtain maximum fluidity; Measure its sub-turgidity difficult to understand and coking coarse grain pattern structure.
2) the conventional high-quality coking coal coking coarse grain pattern structure of certain enterprise of the conventional high-quality coking coal of certain enterprise is 60%, and sub-turgidity difficult to understand is 60%, and maximum adapted amount is 20%, and this high-quality coking coal is defined as benchmark coking coal.Bring the coking coarse grain pattern structure of benchmark coking coal and other two kinds of conventional coking coal of enterprise, sub-turgidity difficult to understand and adapted value into formula (1), determine the adjusted coefficient K of coking coarse grain pattern structure impact
1for-2.1, the adjusted coefficient K of sub-turgidity impact difficult to understand
2be 0.5.
3) calculate the maximum adapted amount of the high low mobile coking coal that expands according to formula (1).
In each embodiment, the high coal analysis that expands low mobile coking coal the results are shown in Table 1.
The single coal coal analysis result of planting of table 1
Embodiment 1
The stand-by high low mobile coking coal that expands is coal sample 1#, and its dry ash-free basis volatilization is divided into 24.26%, and maximum fluidity is 1656ddpm, sub-turgidity difficult to understand is 115%, coking coarse grain pattern structure is 70%, and coal sample is pressed coking coal adapted, brings related data into formula (1) and calculates its maximum adapted amount and be:
Xmax=20%×[1+2.1×（70-60）%/60%-0.5×（115-60）/60]=18%
Not adopting under the condition of coal damping, shaped coal technology and precomminution technique, to control according to aforementioned proportion, coke quality obtains stable raising, 6 meters of coke oven dry coke quenching CSR:65.2%.
Embodiment 2
The stand-by high low mobile coking coal that expands is that its dry ash-free basis volatilization of coal sample 2#. is divided into 27.30%, though Y value reaches 26, but maximum fluidity is 200ddpm only, sub-turgidity difficult to understand is 120%, coarse grain pattern structure is 60%, coal sample is pressed coking coal adapted, brings related data into formula (1) and calculates its maximum adapted amount and be:
Xmax=20%×[1+2.1×（60-60）%/60%-0.5×(120-60)%/60%]=10%
Not adopting under the condition of coal damping, shaped coal technology and precomminution technique, to control according to aforementioned proportion, coke quality obtains stable raising, 6 meters of coke oven dry coke quenching CSR:65.4%.
Embodiment 3
The stand-by high low mobile coking coal that expands is that its dry ash-free basis volatilization of coal sample 3#. is divided into 28.60%, and sub-turgidity difficult to understand is 140%, and coarse grain pattern structure is 55%, and coal sample is pressed coking coal adapted,, bring related data into formula (1) and calculate its maximum adapted amount and be:
Xmax=20%×(1+2.1×(55-60)%/60%-0.5×(140-60)%/60%)=3.3%
Not adopting under the condition of coal damping, shaped coal technology and precomminution technique, to control according to aforementioned proportion, coke quality obtains stable raising, 6 meters of coke oven dry coke quenching CSR:65.4%.
Claims (1)
1. the application method that the sub-turgidity b of Austria is 80～150%, the height of maximum fluidity MF<10000ddpm expands low mobile coking coal, is characterized in that, comprises the steps:
1) degree of mobilization of measuring the high low mobile coking coal that expands is to obtain maximum fluidity; And measure its sub-turgidity difficult to understand and coking coarse grain pattern structure;
2) determine the sub-turgidity of Austria, coking coarse grain pattern structure and the adapted amount of the conventional high-quality coking coal of enterprise, using high-quality coking coal conventional enterprise as benchmark coking coal;
3), according to following formula, calculate the maximum adapted amount of the high low mobile coking coal that expands:
Wherein:
Xmax is the maximum adapted amount of the high low mobile coking coal that expands;
Xmax
excellentfor the maximum adapted amount of benchmark coking coal;
△ CM is that the coking coarse grain pattern structure of high expand low mobile coking coal and benchmark coking coal is poor;
CM
excellentfor the coking coarse grain pattern structure of benchmark coking coal;
△ b is that the low mobile coking coal of high expansion coal and benchmark coking coal sub-turgidity difficult to understand is poor;
B
excellentfor the sub-turgidity of Austria of benchmark coking coal;
K
1, k
2be expressed as the correction factor of burnt coarse grain pattern structure, sub-turgidity impact difficult to understand, k
1, k
2size by the formula of the maximum adapted amount of the high low mobile coking coal that expands of the above-mentioned calculating of coking coarse grain pattern structure, sub-turgidity difficult to understand and the substitution of adapted value of the conventional two kinds of coking coal of the benchmark coking coal of enterprise and other is calculated.
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Effective date of registration: 20170714 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Wuhan, Hubei Friendship Road, No. 999, Wuchang Patentee before: Wuhan Iron & Steel (Group) Corp. |