CN102863980A - Proportioning method for high-expansion low-flowing coking coal - Google Patents

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. 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

The application method of the high low coking coal that flows that expands

Technical field

The invention belongs to the Coking Coal Blending Technology field, be specifically related to the application method of the low coking coal that flows of a kind of high expansion.

Background technology

The rheological of coking coal, swelling property are the important factors that affects coke quality, certain rheology and expansion occur in plastic mass in the coking coal coking process, can promote on every side that the coal grain mutually is subjected to displacement and contacts, fill the space between the coal grain, be beneficial to and improve coke quality.Different single kind coal rheologies are different with expansion characteristics, and the effect of bringing into play at coal-blending coking also is different.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 flowability of swelling property may not be high.To the inferior turgidity b of Austria be 80 ~ 150%, how the height of the maximum fluidity MF＜10000ddpm low adapted ratio that flows coking coal that expands to control, still there is not at present method to follow, when coke making and coal blending, the high adapted that expands the low coking coal that flows exists random, blindness, and coking gained coke quality is stable not.

Summary of the invention

The application method of technical problem to be solved by this invention provides that the inferior turgidity b of a kind of Austria is 80 ~ 150%, the height of maximum fluidity MF＜10000ddpm the expands low coking coal that flows is with the adapted ratio of the high low coking coal that flows that expands of reasonable control.

For solving the problems of the technologies described above, the technical solution used in the present invention comprises the steps:.

1) measures the degree of mobilization of the high low coking coal that flows that expands to obtain maximum fluidity; And measure its inferior turgidity difficult to understand and coking coarse grain pattern structure;

2) determine difficult to understand inferior turgidity, coking coarse grain pattern structure and the adapted amount of the high-quality coking coal that enterprise is commonly used, the high-quality coking coal that enterprise is commonly used is as the benchmark coking coal;

3) calculate high the expansion according to following formula (1) and hang down the maximum adapted amount of the coking coal that flows:

, wherein:

Xmax is the maximum adapted amount of the high low coking coal that flows that expands;

Xmax _ExcellentMaximum adapted amount for the benchmark coking coal;

△ CM is that the coking coarse grain pattern structure of high expand low flow coking coal and benchmark coking coal is poor;

CM _ExcellentCoking coarse grain pattern structure for the benchmark coking coal;

△ b is that the low mobile coking coal of high expansion coal and benchmark coking coal inferior turgidity difficult to understand are poor;

b _ExcellentDifficult to understand inferior turgidity for the benchmark coking coal;

k ₁, k ₂Be expressed as the correction factor of burnt coarse grain pattern structure, inferior turgidity impact difficult to understand.

Because the high low coking coal that flows that expands mainly is that plastic mass is abundant, but the slightly high coking coal of metamorphic grade, the rich coal lower such as volatile matter, and the higher coking coal of Y value.Because of its degree of mobilization not high, turgidity is high, main rising regulated expansion character and certain Thermal Properties of Coke supporting role is provided in coal blending, similar with the coking coal role, and all there has been the adapted proportional range of finding out high-quality coking coal commonly used in each enterprise, the present invention is take enterprise's high-quality coking coal commonly used as the benchmark coking coal, in view of the coking coal ature of coal is playing the adjusting expansion and is providing the Thermal Properties of Coke supporting role affected by coking coarse grain pattern structure and Ao Ya turgidity, the expand adapted amount of low flow coking coal adapted amount and benchmark coking coal of height is unified in inside the formula by the inner link of coking coarse grain pattern structure and Ao Ya turgidity size separately, can be by the adapted amount of known high-quality coking coal commonly used, calculate easily the adapted proportional range of the high low coking coal that flows that expands, thereby realize the reasonable use of the high low coking coal that flows that expands.

Embodiment

The present invention is further detailed explanation below in conjunction with embodiment.

The present invention is high, and the low application method that flows coking coal that expands comprises the steps:

1) degree of mobilization of the low coking coal that flows of measuring that stand-by difficult to understand inferior turgidity b is 80 ~ 150%, the height of maximum fluidity MF＜10000ddpm expands is to obtain maximum fluidity; Measure its inferior turgidity difficult to understand and coking coarse grain pattern structure.

2) certain enterprise of certain enterprise high-quality coking coal commonly used high-quality coking coal coking coarse grain pattern structure commonly used is 60%, and inferior turgidity difficult to understand is 60%, and maximum adapted amount is 20%, and this high-quality coking coal is defined as the benchmark coking coal.Bring the coking coarse grain pattern structure of benchmark coking coal and other two kinds of coking coal commonly used of enterprise, inferior 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 inferior turgidity impact difficult to understand ₂Be 0.5.

3) calculate high the expansion according to formula (1) and hang down the maximum adapted amount of the coking coal that flows.

The high low coal analysis that flows coking coal that expands the results are shown in Table 1 among each embodiment.

The single coal coal analysis result that plants of table 1

Embodiment 1

The stand-by high low coking coal that flows that expands is coal sample 1#, and its dry ash-free basis volatilization is divided into 24.26%, and maximum fluidity is 1656ddpm, inferior turgidity difficult to understand is 115%, coking coarse grain pattern structure is 70%, and coal sample is pressed the 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%

Under the condition that does not adopt coal damping, shaped coal technology and precomminution technique, to control according to aforementioned proportion, coke quality obtains stable raising, 6 meters coke oven dry coke quenching CSR:65.2%.

Embodiment 2

The stand-by high low coking coal that flows 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, inferior turgidity difficult to understand is 120%, the coarse grain pattern structure is 60%, coal sample is pressed the 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%

Under the condition that does not adopt coal damping, shaped coal technology and precomminution technique, to control according to aforementioned proportion, coke quality obtains stable raising, 6 meters coke oven dry coke quenching CSR:65.4%.

Embodiment 3

The stand-by high low coking coal that flows that expands is that its dry ash-free basis volatilization of coal sample 3#. is divided into 28.60%, and inferior turgidity difficult to understand is 140%, and the coarse grain pattern structure is 55%, and coal sample is pressed the 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%

Under the condition that does not adopt coal damping, shaped coal technology and precomminution technique, to control according to aforementioned proportion, coke quality obtains stable raising, 6 meters coke oven dry coke quenching CSR:65.4%.

Claims (1)

1. the application method that the inferior turgidity b of Austria is 80 ~ 150%, the height of maximum fluidity MF＜10000ddpm expands the low coking coal that flows is characterized in that, comprises the steps:

1) measures the degree of mobilization of the high low coking coal that flows that expands to obtain maximum fluidity; And measure its inferior turgidity difficult to understand and coking coarse grain pattern structure;

2) determine difficult to understand inferior turgidity, coking coarse grain pattern structure and the adapted amount of the high-quality coking coal that enterprise is commonly used, the high-quality coking coal that enterprise is commonly used is as the benchmark coking coal;

3) according to following formula, calculate the maximum adapted amount of the high low coking coal that flows that expands:

Wherein:

Xmax is the maximum adapted amount of the high low coking coal that flows that expands;

Xmax _ExcellentMaximum adapted amount for the benchmark coking coal;

△ CM is that the coking coarse grain pattern structure of high expand low flow coking coal and benchmark coking coal is poor;

CM _ExcellentCoking coarse grain pattern structure for the benchmark coking coal;

△ b is that the low mobile coking coal of high expansion coal and benchmark coking coal inferior turgidity difficult to understand are poor;

b _ExcellentDifficult to understand inferior turgidity for the benchmark coking coal;

k ₁, k ₂Be expressed as the correction factor of burnt coarse grain pattern structure, inferior turgidity impact difficult to understand.