JP2012072389A5

JP2012072389A5 -

Info

Publication number: JP2012072389A5
Application number: JP2011187111A
Authority: JP
Filing date: 2011-08-30
Publication date: 2012-09-20
Anticipated expiration: 2031-08-30

Claims

A method of producing coke by dry-distilling a blended coal composed of two or more types of coal or a blended coal obtained by blending a binder with two or more types of coal,
Filling a container with each coal and caking additive constituting the blended coal as a sample, placing a material having through holes on the upper and lower surfaces on the sample, heating the sample, and penetrating into the through hole Measure the permeation distance of the sample and the maximum fluidity (log MF) by the Gieseler plastometer method,
Select the coal whose permeation distance and maximum fluidity fall within the control range (A) satisfying the following formula (1) and formula (2) ,
Part or all of the selected coal is weathered in an oxidizing atmosphere at room temperature or by heat treatment, and the penetration distance and maximum fluidity of the coal after weathering are lower than the penetration distance and maximum fluidity of the coal before weathering. Within the range (B), blend the weathered coal,
A method for producing metallurgical coke, characterized in that:
logMF ≧ 2.5 (1)
Permeation distance ≧ 1.3 × a × logMF (2)
However, “a” measures at least one permeation distance and log MF of coal and binder in the range of log MF <2.5 among each coal and binder constituting the coal blend, It is a constant in the range of 0.7 to 1.0 times the log MF coefficient when a regression line passing through the origin is created using the measured value.

A method of producing coke by dry-distilling a blended coal composed of two or more types of coal or a blended coal obtained by blending a binder with two or more types of coal,
Filling a container with each coal and caking additive constituting the blended coal as a sample, placing a material having through holes on the upper and lower surfaces on the sample, heating the sample, and penetrating into the through hole Measure the permeation distance of the sample and the maximum fluidity (log MF) by the Gieseler plastometer method,
Select the coal whose permeation distance and maximum fluidity fall within the control range (A) satisfying the following formula (3) and formula (4) ,
Part or all of the selected coal is weathered in an oxidizing atmosphere at room temperature or heat treatment, and the penetration distance and maximum fluidity of the coal after weathering are lower than the penetration distance and maximum fluidity of the coal before weathering Within the range (B), blend the weathered coal,
A method for producing metallurgical coke, characterized in that:
logMF ≧ 2.5 (3)
Permeation distance ≧ a ′ × log MF + b (4)
However, "a '" measures the penetration distance and log MF of at least one kind of coal and binder in the range of log MF <2.5 among the coal and binder that constitute the blended coal, It is a constant in the range of 0.7 to 1.0 times the coefficient of logMF when a regression line passing through the origin is created using the measured value.
“B” is a constant that is not less than the average value of the standard deviation when measuring one or more types of the same sample selected from the brands used to create the regression line, and not more than 5 times the average value. is there.

A method of producing coke by dry-distilling a blended coal composed of two or more types of coal or a blended coal obtained by blending a binder with two or more types of coal,
Filling a container with each coal and caking additive constituting the blended coal as a sample, placing a material having through holes on the upper and lower surfaces on the sample, heating the sample, and penetrating into the through hole Measure the permeation distance of the sample and the maximum fluidity (log MF) by the Gieseler plastometer method,
Select the coal whose permeation distance and maximum fluidity fall within the management range (A) required by the following (a) to (c) ,
Part or all of the selected coal is weathered in an oxidizing atmosphere at room temperature or heat treatment, and the penetration distance and maximum fluidity of the coal after weathering are lower than the penetration distance and maximum fluidity of the coal before weathering Within the range (B), blend the weathered coal,
A method for producing metallurgical coke, characterized in that:
(A) Predetermining the coal or caking additive contained in the coal blend used for coke production, and the blending ratio of the coal or caking additive,
(B) Measure the penetration distance and log MF of the coal or binder;
(C) The control range (A) is a range that is at least twice the weighted average penetration distance calculated from the penetration distance and blending ratio of coal or binder with a log MF less than 3.2 contained in the blended coal. decide.

A method of producing coke by dry-distilling a blended coal composed of two or more types of coal or a blended coal obtained by blending a binder with two or more types of coal,
Filling a container with each coal and caking additive constituting the blended coal as a sample, placing a material having through holes on the upper and lower surfaces on the sample, heating the sample, and penetrating into the through hole Measure the permeation distance of the sample and the maximum fluidity (log MF) by the Gieseler plastometer method,
Select the coal whose permeation distance and maximum fluidity fall within the management range (A) determined by (d) and (e) below ,
Part or all of the selected coal is weathered in an oxidizing atmosphere at room temperature or heat treatment, and the penetration distance and maximum fluidity of the coal after weathering are lower than the penetration distance and maximum fluidity of the coal before weathering Within the range (B), blend the weathered coal,
A method for producing metallurgical coke, characterized in that:
(D) Coal or caking material sample is pulverized so that the particle size is 2 mm or less is 100 mass%, and the pulverized sample is filled into a container so as to have a packing density of 0.8 g / cm ³ and a layer thickness of 10 mm. A glass bead having a diameter of 2 mm is arranged on the sample with a layer thickness equal to or greater than the permeation distance, and a heating rate is 3 ° C./min while applying a load from the top of the glass bead to a pressure of 50 kPa. In the measurement conditions when heated in an inert gas atmosphere from room temperature to 550 ° C., the penetration distance of the management range (A) is 15 mm or more, and
(E) The log MF of the management range (A) is 2.5 or more.

The weathering according to any one of claims 1 to 4 , wherein the weathering is performed so that the penetration distance and the maximum fluidity of the coal after the weathering are within a control range (B) defined by the following formula (5). The manufacturing method of the metallurgical coke as described.
Penetration distance <1.3 × a × logMF (5)
However, “a” measures at least one permeation distance and log MF of coal and binder in the range of log MF <2.5 among each coal and binder constituting the coal blend, It is a constant in the range of 0.7 to 1.0 times the log MF coefficient when a regression line passing through the origin is created using the measured value.

The weathering according to any one of claims 1 to 4 , wherein the weathered coal is weathered so that a penetration distance and a maximum fluidity of the coal are within a control range (B) defined by the following formula (6). The manufacturing method of the metallurgical coke as described.
Permeation distance <a ′ × log MF + b (6)
However, "a '" measures the penetration distance and log MF of at least one kind of coal and binder in the range of log MF <2.5 among the coal and binder that constitute the blended coal, It is a constant in the range of 0.7 to 1.0 times the coefficient of logMF when a regression line passing through the origin is created using the measured value.
b is a constant that is not less than the average value of the standard deviation when measuring one or more types of the same sample selected from the brands used for creating the regression line, and not more than 5 times the average value.

“A” measures at least one permeation distance and log MF of coal and binder in the range of 1.75 <log MF <2.50 among the coal and binder constituting the coal blend. The metallurgy according to claim 1 or 5 , wherein the metallurgy is a constant in a range of 0.7 to 1.0 times the coefficient of log MF when a regression line passing through the origin is created using the measured value. Coke production method.

The “a ′” represents at least one permeation distance and log MF of coal and binder in the range of 1.75 <log MF <2.50 among the coal and binder constituting the blended coal. measured, according to claim 2 or 6, characterized in that a constant of 0.7 to 1.0 times the range of the coefficient of logMF while writing a regression line passing through the origin with the measured value A method for producing metallurgical coke.

Predetermining the coal or caking additive brand contained in the blended coal used for coke production and the coal or caking additive blending ratio of each brand,
The weighted average calculated by measuring the penetration distance and log MF of each brand of coal or binder, and calculating from the penetration distance and blending ratio of each brand of coal or binder with a log MF of less than 3.2. Calculate the penetration distance,
Permeation distance of coal after weathering, the weight and wherein the to weathered to be within the is control range less than twice (B) with respect to the average penetration distance, any one of claims 1 to 4 A method for producing metallurgical coke as described in 1.

The coal penetration after weathering is pulverized so that the coal sample has a particle size of 2 mm or less is 100 mass%, and the pulverized sample is packed in a container so that the packing density is 0.8 g / cm ³ and the layer thickness is 10 mm. The sample is filled to form a glass bead having a diameter of 2 mm on the sample with a layer thickness equal to or greater than the permeation distance, and a heating rate of 3 ° C. / is weathered to be within the control range is less than 15mm in measurements when heated in an inert gas atmosphere to 550 ° C. from room temperature (B) in minutes, and wherein the, claims 1 to 4 A method for producing metallurgical coke according to any one of the above.

The measurement of the penetration distance, the while loading the constant load from the top of the material having a through hole on upper and lower surfaces, according to claim 1 to claim 3, wherein, characterized in that heating the sample at a predetermined heating rate The method for producing metallurgical coke according to any one of claims 5 to 9 .

The measurement of the penetration distance, while maintaining a material having through-holes on the upper and lower surfaces and the sample at a constant volume, claims 1 to 3, wherein, characterized in that heating the sample at a predetermined heating rate The method for producing metallurgical coke according to any one of claims 5 to 9 .

Maximum fluidity degree of coal after weathering, characterized in that to weathered to be within the range of maximum fluidity degree determined by logMF ≧ 2.5 and management range (B), of claim 1 to claim 1 2 A method for producing metallurgical coke according to any one of the preceding claims.

The oxidizing atmosphere for performing the weathering is a gas atmosphere containing one or more components of O ₂ , CO ₂ , and H ₂ O, according to any one of claims 1 to 13. The manufacturing method of the metallurgical coke as described.

As an oxidizing atmosphere when performing the weathering, characterized in that an air atmosphere, the production method of metallurgical coke as recited in claim 1 4.

The metallurgy according to any one of claims 1 to 15 , wherein the heat treatment at the time of the weathering is a treatment temperature of 100 ° C to 300 ° C and a treatment time of 1 to 120 minutes. Coke production method.

The method for producing metallurgical coke according to claim 16 , wherein the heat treatment at the time of the weathering is a treatment temperature of 180 ° C. to 220 ° C. and a treatment time of 1 to 30 minutes.

When performing the weathering, part or all of the coal and caking additive used for coke production are classified in advance, and only particles having a predetermined mesh size or more are weathered. 17. The method for producing metallurgical coke according to any one of 17 above.

When performing the weathering, wherein the predetermined sieve mesh when classifying the coal and caking additive is used in coke production is intended to be selected from a range of 1Mm～6mm, according to claim 1 8 A method for producing metallurgical coke.