CN113684048A - Coking coal blending method, coal blending system and industrial control equipment - Google Patents
Coking coal blending method, coal blending system and industrial control equipment Download PDFInfo
- Publication number
- CN113684048A CN113684048A CN202110955118.XA CN202110955118A CN113684048A CN 113684048 A CN113684048 A CN 113684048A CN 202110955118 A CN202110955118 A CN 202110955118A CN 113684048 A CN113684048 A CN 113684048A
- Authority
- CN
- China
- Prior art keywords
- coal
- blending
- vitrinite
- determining
- blended
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
The invention discloses a novel coking and coal blending method, which comprises the following steps: acquiring N types of coal to be sorted and a Gieseler fluidity reference value; according to the N kinds of coal to be selected, obtaining a volume inertia curve and a vitrinite maximum reflectivity of each kind of coal to be selected; determining the volume inertness of each coal to be selected according to the Gieseler fluidity reference value and the volume inertness curve of the coal to be selected; determining the coal blending ratio of the candidate blended coal according to the N types of coal to be selected and the inert capacity of each type of coal to be selected; determining the vitrinite average maximum reflectance and vitrinite maximum reflectance standard deviation of the candidate blended coal according to the blending ratio of the candidate blended coal and the vitrinite maximum reflectance of each type of coal to be selected; determining the coal blending ratio of the candidate blended coal of which the vitrinite average maximum reflectivity and the vitrinite maximum reflectivity standard deviation meet preset conditions as the coal blending ratio of a first target blended coal; the coal blending method can adopt fewer coal blending indexes to carry out accurate coal blending.
Description
Technical Field
The application relates to the technical field of coking, in particular to a coking and coal blending method, a coal blending system and industrial control equipment.
Background
The coke is one of the main raw fuels for smelting iron in the blast furnace, and the quality requirement of the coke in the blast furnace is higher and higher along with the large-scale blast furnace and the application of smelting technologies such as oxygen-enriched blowing and the like. In the traditional coal blending method such as a volatile component V value-caking index G value coal blending method and the like, dry ash-free base volatile components are used as a coalification degree index, but the measurement of the dry ash-free base volatile components is influenced by coal rock micro-components and coal middling mineral substances, so that the measured value deviation is caused; in addition, in order to obtain coke with good quality, the quality of the blended coal needs to be improved, particularly the caking property of the blended coal, but the identification capability of the caking index G value on coal with strong caking property is poor; therefore, the traditional V-G coal blending method cannot well meet the current coal blending requirement.
In the coal rock coal blending method developed in recent decades, indexes such as active component content, activity-inertia ratio or composition balance index are adopted, and when special coal is encountered, such as coal with high activity-inertia ratio but poor caking property, the coal blending guidance effect is poor; and the related coal blending indexes are more, and the specific operation is too complicated.
Disclosure of Invention
The invention provides a coking coal blending method, a coal blending system and industrial control equipment, which aim to solve or partially solve the technical problem of poor coal blending guidance effect of the existing V-G coal blending method or coal rock coal blending method.
In order to solve the above technical problem, according to an alternative embodiment of the present invention, there is provided a method for coking and blending coal, including:
acquiring N types of coal to be sorted and a Gieseler fluidity reference value; n is not less than 2 and is an integer;
according to the N kinds of coal to be selected, obtaining a volume inertia curve and a vitrinite maximum reflectivity of each kind of coal to be selected; the inertia containing curve comprises a mapping relation between the Kirschner fluidity of the mixed coal and the mixing proportion of the mixed coal, and the mixed coal is the mixture of the coal to be selected and the reference inert coal;
determining the volume inertness of each coal to be selected according to the Gieseler fluidity reference value and the volume inertness curve of the coal to be selected;
determining the coal blending ratio of the candidate blended coal according to the N kinds of coal to be selected and the inert capacity of each kind of coal to be selected;
determining the vitrinite average maximum reflectance and vitrinite maximum reflectance standard deviation of the candidate blended coals according to the blending ratio of the candidate blended coals and the vitrinite maximum reflectance of each to-be-selected coal;
and determining the coal blending ratio of the candidate blended coal, of which the vitrinite average maximum reflectivity and the vitrinite maximum reflectivity standard deviation meet preset conditions, as the coal blending ratio of the first target blended coal.
Optionally, the preset conditions include:
the vitrinite average maximum reflectance is greater than or equal to 1.25%;
the standard deviation of the maximum reflectivity of the vitrinite is greater than or equal to 0.2 and less than or equal to 0.35.
Optionally, the baseline value of the coriolis fluidity is determined as follows:
acquiring the strength index of target coke; the strength index comprises at least one of crack resistance strength, wear resistance strength and strength after reaction;
and determining the Gieseler fluidity reference value according to the intensity index.
Optionally, the inertia curve of each coal to be selected is determined according to the following method:
obtaining the coal to be selected and the reference inert coal;
mixing the coal to be selected with the reference inert coal according to M preset proportions to obtain M kinds of mixed coal; m >2 and is an integer;
performing fluidity test on each mixed coal to obtain the Gieseler fluidity of each mixed coal;
and determining a volume inertia curve of the coal to be selected according to the Gieseler fluidity of each kind of mixed coal and a preset proportion corresponding to the Gieseler fluidity of each kind of mixed coal.
Further, the M preset ratios are determined according to the following method:
acquiring the Gieseler fluidity of the coal to be selected;
and determining the M preset proportions according to the Gieseler fluidity of the coal to be selected.
Further, the determining the M preset ratios according to the kirschner fluidity of the coal to be selected includes:
if the Gieseler fluidity of the coal to be selected is greater than 10000ddpm, the mass part range of the coal to be selected is 100-50, and the mass part range of the reference inert coal is 0-50;
if the Gieseler fluidity of the coal to be selected is larger than 2500ddpm and smaller than or equal to 10000ddpm, the mass part range of the coal to be selected is 100-55, and the mass part range of the reference inert coal is 0-45;
if the Gieseler fluidity of the coal to be selected is greater than 500ddpm and less than or equal to 2500ddpm, the mass part range of the coal to be selected is 100-60, and the mass part range of the reference inert coal is 0-40;
if the Gieseler fluidity of the coal to be selected is greater than 100ddpm and less than or equal to 500ddpm, the mass part range of the coal to be selected is 100-75, and the mass part range of the reference inert coal is 0-25;
wherein the sum of the mass part of the coal to be selected and the mass part of the reference inert coal is 100.
Optionally, the determining the coal blending ratio of the candidate blended coal according to the N kinds of coals to be selected and the inertness capacity of each kind of coal to be selected specifically includes:
determining an initial coal blending ratio;
determining the maximum proportion of weak caking coal matched with the initial coal blending ratio according to the initial coal blending ratio and the inertness capacity of each coal to be selected in the initial coal blending ratio;
and adjusting the proportion of the low-metamorphic weak caking coal and/or the high-metamorphic weak caking coal in the N kinds of coal to be selected according to the maximum proportion of the weak caking coal to obtain the coal blending ratio of the candidate blending coal.
Optionally, after determining the coal blending ratio of the first target blended coal, the coal blending method further includes:
blending coal according to the coal blending ratio of the first target blended coal to obtain first target blended coal;
acquiring the Gieseler fluidity of the first target blended coal;
if the Kirschner flow of the first target blended coal is smaller than a preset value, adjusting the blending ratio of the first target blended coal to obtain a second target blended coal; and the Kirschner flow of the second target blended coal is greater than the preset value, and the average maximum reflectance of the vitrinite and the standard deviation of the maximum reflectance of the vitrinite meet the preset condition.
According to yet another alternative embodiment of the present invention, there is provided a coking coal blending system, including:
the acquisition module is used for acquiring N types of coal to be selected and the Gieseler fluidity reference value; n is not less than 2 and is an integer; according to the N kinds of coal to be selected, obtaining a inertia-tolerant curve and a vitrinite maximum reflectivity of each kind of coal to be selected; the inertia containing curve comprises a mapping relation between the Kirschner fluidity of the mixed coal and the mixing proportion of the mixed coal, and the mixed coal is the mixture of the coal to be selected and the reference inert coal;
the first determining module is used for determining the volume inertness of each type of coal to be selected according to the Gieseler fluidity reference value and the volume inertness curve of the coal to be selected;
the second determining module is used for determining the coal blending ratio of the candidate blended coal according to the N kinds of coals to be selected and the inert capacity of each kind of coal to be selected;
the third determining module is used for determining the vitrinite average maximum reflectivity and vitrinite maximum reflectivity standard deviation of the candidate blended coal according to the blending ratio of the candidate blended coal and the vitrinite maximum reflectivity of each type of coal to be selected;
and the fourth determining module is used for determining the coal blending ratio of the candidate blending coal of which the vitrinite average maximum reflectivity and the vitrinite maximum reflectivity standard deviation meet the preset conditions as the coal blending ratio of the first target blending coal.
According to yet another alternative embodiment of the present invention, there is also provided an industrial control device, including a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor can implement the coal blending method steps of any one of the preceding technical solutions when executing the program.
Through one or more technical schemes of the invention, the invention has the following beneficial effects or advantages:
the invention provides a coking and coal blending method, which is based on a plastic coking theory and performs coal blending from the perspective of the quantity and quality of a colloidal body formed by coal in a coking process; specifically, the adhesive property indexes are adopted: the Gieseler fluidity characterizes the number of the colloidal bodies, because the Gieseler fluidity can well characterize the properties of the colloidal bodies of medium and strong caking coal; then further obtaining a capacity-inertness curve of each coal to be selected, determining the capacity-inertness of each coal to be selected by combining a predetermined Kirschner mobility reference value, namely the capacity-inertness of the coal to be selected, and blending the coal according to the capacity-inertness capacity of each coal to be selected to obtain candidate blended coal, so that the defect that the identification capability of the caking index G value on the coal with strong caking property in a V-G coal blending method is poor is overcome, and the defect that the coal blending by adopting special coal with similar high activity-inertness ratio and low caking property cannot be accurately guided by the activity-inertness ratio obtained according to coal rock indexes is overcome; on the other hand, the vitrinite maximum reflectance is used as a lithofacies index, and the metamorphic grade of the coal can be accurately reflected, so that after candidate blended coal is obtained, the vitrinite average maximum reflectance and vitrinite maximum reflectance standard deviation of the candidate blended coal are calculated according to the blending coal ratio and the vitrinite maximum reflectance of each candidate coal, the metamorphic grade of the blended coal can be accurately represented, the quality of a colloidal body is measured, and the blending coal ratio of the candidate blended coal, of which the vitrinite average maximum reflectance and the vitrinite maximum reflectance standard deviation meet preset conditions, is determined as the blending coal ratio of the target blended coal. In general, by combining the methods, the aim of accurately blending coal by adopting less coal blending indexes is fulfilled, the obtained target blended coal realizes the unification of the caking property index and the lithofacies index, and the produced coke can well meet the production requirement of the current large-scale blast furnace.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 shows a schematic flow diagram of a coking coal blending method according to one embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a method for determining a coasting curve of coal to be sorted according to an embodiment of the present invention;
FIG. 3 illustrates a schematic flow diagram of a method of adjusting a blending ratio of a first target blended coal according to one embodiment of the invention;
FIG. 4 shows a schematic diagram of a coking and coal blending system according to another embodiment of the present invention.
Detailed Description
In order to make the present application more clearly understood by those skilled in the art to which the present application pertains, the following detailed description of the present application is made with reference to the accompanying drawings by way of specific embodiments. Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control. Unless otherwise specifically stated, various apparatuses and the like used in the present invention are either commercially available or can be prepared by existing methods.
The inventor finds that for the V-G coal blending method, the measurement of volatile components can be influenced by coal rock micro-components and minerals in coal to cause measurement value deviation, and the coalification degree is more accurately judged by adopting the average maximum reflectivity of vitrinite; the G value is generally used as a cohesiveness index, but the requirement on the coke quality of a large-scale blast furnace is high, the requirement on the G value of the blended coal is high, and the characterization on the cohesiveness of the coal is not sensitive enough when the G value of the coal is more than 80. In addition, most of mixed coal exists in the current market, and cannot be identified depending on V and G values of volatile components, for example, lean coal and fat coal are mixed according to a certain proportion, the volatile components and the G values of the mixed coal are close to those of coking coal, and if the mixed coal is used as the coking coal, the quality fluctuation of the coking coal can be caused.
For the coal-rock coal blending method, indexes such as active component content, activity-inertia ratio or composition balance index are adopted, but the caking property index of coal is not adopted for coal blending. When special coals with high live-to-inertness ratio but poor caking properties are encountered, e.g. vitrinite average maximum reflectance R of a coalmax1.1 percent, the content of vitrinite and chitin exceeds 97 percent, the ratio of active components to inert components, namely the active-inert ratio, is up to 32, and when coal with high active-inert ratio and poor caking property is encountered, coal with high content of inert components can be added to adjust the active-inert ratio according to the rock phase coal blending theory so as to ensure that the coal is in the optimal active-inert ratio; however, the fluidity of the coal is only 33ddpm, the caking property is poor, the coal does not belong to strong caking coal, and the coal with high content of inert components is not suitable for being added. Therefore, the coal blending method for coal petrography has poor guiding effect on the blending of the special coal.
Based on the above analysis and research, in order to solve the defects of the V-G coal blending and coal rock coal blending method, the invention provides a novel coking coal blending method, the overall thought of which is as follows:
acquiring N types of coal to be sorted and a Gieseler fluidity reference value; according to the N kinds of coal to be selected, obtaining a volume inertia curve and a vitrinite maximum reflectivity of each kind of coal to be selected; determining the volume inertness of each coal to be selected according to the Gieseler fluidity reference value and the volume inertness curve of the coal to be selected; determining the coal blending ratio of the candidate blended coal according to the N kinds of coal to be selected and the inert capacity of each kind of coal to be selected; determining the vitrinite average maximum reflectance and vitrinite maximum reflectance standard deviation of the candidate blended coals according to the blending ratio of the candidate blended coals and the vitrinite maximum reflectance of each to-be-selected coal; and determining the coal blending ratio of the candidate blended coal, of which the vitrinite average maximum reflectivity and the vitrinite maximum reflectivity standard deviation meet preset conditions, as the coal blending ratio of the first target blended coal.
The idea of the coal blending method is as follows: based on a plastic coking theory, blending coal from the perspective of the quantity and quality of a colloidal body formed by the coal in the coking process; specifically, the adhesive property indexes are adopted: the Gieseler fluidity characterizes the number of the colloidal bodies, because the Gieseler fluidity can well characterize the properties of the colloidal bodies of medium and strong caking coal; then further obtaining a capacity-inertness curve of each coal to be selected, determining the capacity-inertness of each coal to be selected by combining a predetermined Kirschner mobility reference value, namely the capacity-inertness of the coal to be selected, and blending the coal according to the capacity-inertness capacity of each coal to be selected to obtain candidate blended coal, so that the defect that the identification capability of the caking index G value on the coal with strong caking property in a V-G coal blending method is poor is overcome, and the defect that the coal blending by adopting special coal with similar high activity-inertness ratio and low caking property cannot be accurately guided by the activity-inertness ratio obtained according to coal rock indexes is overcome; on the other hand, the vitrinite maximum reflectance is used as a lithofacies index, and the metamorphic grade of the coal can be accurately reflected, so that after candidate blended coal is obtained, the vitrinite average maximum reflectance and vitrinite maximum reflectance standard deviation of the candidate blended coal are calculated according to the blending coal ratio and the vitrinite maximum reflectance of each candidate coal, the metamorphic grade of the blended coal can be accurately represented, the quality of a colloidal body is measured, and the blending coal ratio of the candidate blended coal, of which the vitrinite average maximum reflectance and the vitrinite maximum reflectance standard deviation meet preset conditions, is determined as the blending coal ratio of the target blended coal. Through the combination of the scheme, the aim of accurately blending coal by adopting fewer coal blending indexes is fulfilled, the uniformity of the caking property index and the lithofacies index is realized according to the target blended coal obtained by the coal blending ratio of the target blended coal, and the produced coke can well meet the production requirement of the current large-scale blast furnace.
In the following, the above-described embodiments will be described in detail with reference to the following embodiments:
based on the foregoing inventive concept, in an alternative embodiment, as shown in fig. 1, there is provided a coal blending method, comprising:
s1: acquiring N types of coal to be sorted and a Gieseler fluidity reference value; n is not less than 2 and is an integer;
specifically, a plurality of coals to be selected required by coal blending are obtained before coal blending, and the baseline value of the Gieseler fluidity of all the coals to be selected is determined. The Gieseler fluidity is a quantity that characterizes the flow properties of the colloids formed during pyrolysis of the coal and is used in this example as an indicator of the cohesion that characterizes the quantity of colloids, the test method being described in reference to the standard MT/T1015-2006 or ISO 10329: 2009.
the Kirschner fluidity reference value is a reference value determined according to the strength of the target coke, and is used for determining the volume inertness of the coal to be selected from the volume inertness curve of each coal to be selected in the subsequent steps. An optional method of determining the baseline value of the Gieseler fluidity is:
acquiring the strength index of target coke; the strength index comprises at least one of crack resistance strength, wear resistance strength and strength after reaction; and determining the Gieseler fluidity reference value according to the intensity index.
Specifically, with the increase of the Gieseler fluidity of the blended coal obtained by blending the coal to be sorted, the strength (such as crack resistance M40, abrasion resistance M10 and post-reaction strength CSR) of the produced coke tends to be good, namely: the crack resistance M40 is increased, the wear resistance M10 is reduced, and the post-reaction strength CSR is increased. The higher the Kirschner fluidity of the blended coal is, the larger the blending amount of the strongly caking coal is, and the higher the blending cost is. Therefore, the baseline value of the Kirschner flow rate is determined in consideration of the target strength and the blending cost required for the target coke. For the most part, the baseline value of Gibber's fluidity will range from 50ddpm to 200ddpm, preferably 100 ddpm.
Common adhesion indicators also include: the coal-based binder has the advantages that the binder has a caking index (G value), the Australian expansion degrees (a and b), the maximum thickness (Y) of a colloidal layer and the like, wherein the caking index G and the Australian expansion degrees can represent the properties of the colloidal body of medium and weak caking coal, but the distinguishing capability of the caking index G on the strong caking coal is weaker, and the Australian expansion degree has a distortion phenomenon on the strong expansibility coal; the maximum thickness and the Gieseler fluidity of the colloidal layer can represent the properties of the colloidal body of medium and strong caking coal, but the detection method of the colloidal layer thickness has extremely strong normalization, has large relationship with the proficiency and hand feeling of detection personnel, and may have certain errors in numerical measurement; and the Gieseler fluidity can well represent the properties of the colloidal body of medium and strong caking coal. Therefore, the invention adopts the Gieseler fluidity index to measure the number of the colloidal substances, obtains the inertia capacity curve of the coal to be selected based on the Gieseler fluidity in the next step, determines the inertia capacity of the coal to be selected based on the Gieseler fluidity reference value, and overcomes the defect of poor identification capability of the caking index G value to the coal with strong caking property in the traditional V-G coal blending method.
S2: according to the N kinds of coal to be selected, obtaining a volume inertia curve and a vitrinite maximum reflectivity of each kind of coal to be selected; the inertia containing curve comprises a mapping relation between the Kirschner fluidity of the mixed coal and the mixing proportion of the mixed coal, and the mixed coal is the mixture of the coal to be selected and the reference inert coal;
the inertness curve and the vitrinite maximum reflectivity of each coal to be selected can be predetermined and can be directly used during coal blending. As shown in fig. 2, an alternative method for determining the inertness curve of the coal to be selected is as follows:
s21: obtaining the coal to be selected and the reference inert coal;
specifically, the reference inert coal may be high-metamorphic weak-caking coal.
S22: mixing the coal to be selected with the reference inert coal according to M preset proportions to obtain M kinds of mixed coal; m >2 and is an integer;
s23: performing fluidity test on each mixed coal to obtain the Gieseler fluidity of each mixed coal;
specifically, the coal to be selected and the reference inert coal are mixed according to a plurality of preset proportions, the Gieseler fluidity test is carried out, and the Gieseler fluidity of the mixed coal at each preset proportion or mixing proportion is measured.
Optionally, the M preset proportions of each coal to be selected may be determined according to the following method:
acquiring the Gieseler fluidity of the coal to be selected; and determining the M preset proportions according to the Gieseler fluidity of the coal to be selected.
Specifically, if the Gieseler fluidity of the coal to be selected is greater than 10000ddpm, the mass part range of the coal to be selected is 100-50, and the mass part range of the reference inert coal is 0-50;
if the Gieseler fluidity of the coal to be selected is larger than 2500ddpm and smaller than or equal to 10000ddpm, the mass part range of the coal to be selected is 100-55, and the mass part range of the reference inert coal is 0-45;
if the Gieseler fluidity of the coal to be selected is greater than 500ddpm and less than or equal to 2500ddpm, the mass part range of the coal to be selected is 100-60, and the mass part range of the reference inert coal is 0-40;
if the Gieseler fluidity of the coal to be selected is greater than 100ddpm and less than or equal to 500ddpm, the mass part range of the coal to be selected is 100-75, and the mass part range of the reference inert coal is 0-25;
wherein the sum of the mass part of the coal to be selected and the mass part of the reference inert coal is 100.
The proportion is a preferable preset mixing proportion obtained through a large number of tests, the blending quantity range of the coal to be selected and the blending quantity range of the reference inert coal can be quickly obtained according to the scheme according to different Gieseler fluidity of the coal to be selected, then a plurality of specific blending quantities are taken from the respective blending quantity ranges to form M kinds of preset proportions, and the inertness-tolerant curve test is carried out after M kinds of mixed coal are obtained.
S24: and determining a volume inertia curve of the coal to be selected according to the Gieseler fluidity of each kind of mixed coal and a preset proportion corresponding to the Gieseler fluidity of each kind of mixed coal.
Specifically, fitting is carried out according to the mixing proportion of the M groups of mixed coal and the corresponding Gieseler fluidity, so as to obtain a inertness curve of the coal to be selected. The inertia containing curve can be a mapping relation that the blending proportion of the reference inert coal in the mixed coal, namely the mass part is taken as an abscissa, and the Kirschner fluidity value of the mixed coal is taken as an ordinate.
Preferably, according to the difference of the Gieseler fluidity of the coal to be selected, the mixing can be carried out by adopting the following preset proportion:
if the Gieseler fluidity of the coal to be selected is more than 10000ddpm, according to the coal to be selected: mixing the standard inert coal at a ratio of 100:0, 85:15, 70:30, 60:40 and 50:50 to obtain 5 kinds of mixed coal;
if the Gieseler fluidity of the coal to be selected is 2500ddpm-10000ddpm, according to the coal to be selected: mixing the standard inert coal at a ratio of 100:0, 85:15, 70:30, 60:40 and 55:45 to obtain 5 kinds of mixed coal;
if the Gieseler fluidity of the coal to be separated is 500-2500 ddpm, according to the coal to be separated: mixing the standard inert coal at a ratio of 100:0, 90:10, 80:20, 70:30 and 60:40 to obtain 5 kinds of mixed coal;
if the Gieseler fluidity of the coal to be separated is 100-500 ddpm, according to the coal to be separated: the reference inert coal was mixed at a ratio of 100:0, 95:5, 90:10, 80:20, and 75:25 to obtain 5 kinds of mixed coal.
After 5 kinds of mixed coal are obtained, measuring the Kirschner fluidity of each kind of mixed coal, then taking the Kirschner fluidity of each kind of mixed coal as a vertical coordinate, taking the dosage of the reference inert coal in each kind of mixed coal as a horizontal coordinate, and obtaining the inertness-capacitance curve and the corresponding fitting equation of the coal to be selected through fitting.
If the Gieseler fluidity of the coal to be separated is below 100ddpm, no inertness curve is measured.
According to the preset proportion, the method can obtain the inertness-tolerant curve of the coal to be selected as accurate as possible with the least coal blending quantity, so that the accuracy of the inertness-tolerant quantity of the coal to be selected determined according to the Gieseler fluidity reference value is improved.
S3: determining the volume inertness of each coal to be selected according to the Gieseler fluidity reference value and the volume inertness curve of the coal to be selected;
the inertness-tolerant capacity is also called inertness-tolerant capacity, and represents the capacity of coal to contain inert substances, and is an index for representing the caking property of coal. Because the inertia-tolerant curve is the mapping relation between the Kirschner fluidity and the dosage of the reference inert coal in the mixed coal, the dosage of the reference Kirschner fluidity which is taken as the reference value of the Kirschner fluidity in the mixed coal can be obtained by referring to the inertia-tolerant curve or a fitting equation according to the reference value of the Kirschner fluidity.
For example, the baseline value of the Gieseler fluidity is 100ddpm, and referring to the volume inertia curve of a certain coal to be selected, the corresponding abscissa at the position of 100ddpm is found to be the coal to be selected: the proportion of the reference inert coal is 80:20, determining the inert capacity R of the coal to be sorted100 iWhen 20/80 is 25%, 25% of basic inert coal can be added into 1 part of coal to be selected.
S4: determining the coal blending ratio of the candidate blended coal according to the N kinds of coal to be selected and the inert capacity of each kind of coal to be selected;
the candidate blending coal is a set of coal blending scheme determined according to the coal to be selected and the coal capacity and inertia of the coal to be selected. An alternative method for determining a blending ratio of a candidate blended coal comprises:
determining an initial coal blending ratio; the initial coal blending ratio comprises the blending amount d of each candidate coali(ii) a Dosage diIs the mass percentage.
Determining the maximum proportion of weak caking coal matched with the initial coal blending ratio according to the initial coal blending ratio and the inertness capacity of each coal to be selected in the initial coal blending ratio;
the determination method of the maximum proportion of the weak caking coal comprises the following steps:
in the above formula, diThe mass percentage of each coal to be selected in the candidate blended coal is calculated; r100 iFor the volume inertness of each coal to be selected, the reference value of the Gieseler fluidity is 100ddpm as an example.
And adjusting the proportion of the low-metamorphic weak caking coal and/or the high-metamorphic weak caking coal in the N kinds of coal to be selected according to the maximum proportion of the weak caking coal to obtain the coal blending ratio of the candidate blending coal.
The adjustment principle is that the mixture ratio of the weak caking coal does not exceed the maximum ratio, and in order to improve the quality of the produced coke, the mixture ratio of the weak caking coal is preferably lower than the maximum ratio. The weak caking coal comprises high metamorphic degree weak caking coal and low metamorphic degree weak caking coal, and the distribution of the two coals influences the average maximum reflectivity and the standard deviation of the vitrinite of the next candidate blending coal, so the distribution amount of the two weak caking coals is adjusted according to the situation.
By the scheme, the blending ratio of the candidate blending coal can be obtained.
S5: determining the vitrinite average maximum reflectance and vitrinite maximum reflectance standard deviation of the candidate blended coal according to the blending ratio of the candidate blended coal and the vitrinite average maximum reflectance of each to-be-selected coal;
wherein the vitrinite average maximum reflectance of the candidate blended coal
The calculation method comprises the following steps:
in the above formula, diThe mass percentage of each coal to be selected in the candidate blended coal,
the maximum reflectivity of the vitrinite of the coal i to be sorted is obtained.
For the vitrinite maximum reflectance standard deviation of the candidate blended coal, a set of simplified algorithm is provided, which specifically comprises the following steps:
s6: and determining the coal blending ratio of the candidate blended coal, of which the vitrinite average maximum reflectivity and the vitrinite maximum reflectivity standard deviation meet preset conditions, as the coal blending ratio of the first target blended coal.
Specifically, whether the candidate blending coal meets the blending requirement is judged by analyzing whether the vitrinite average maximum reflectance and vitrinite maximum reflectance standard deviation of the candidate blending coal meet the preset conditions, and if the candidate blending coal does not meet the preset conditions, the blending ratio is adjusted until the preset conditions are met.
The coal blending ratio verification method is adopted because the vitrinite average maximum reflectance and the standard deviation can represent the quality of the coal colloidal body, the vitrinite average maximum reflectance and the standard deviation comprise the caking property index and the lithofacies index of the coal (namely vitrinite reflectance and the metamorphism degree of standard coal), the unification of the vitrinite reflectance and the lithofacies index is realized, and the purpose of more accurately blending the coal by adopting less coal blending indexes is achieved.
Specifically, through a large number of studies and data analysis, the preset conditions include:
the vitrinite average maximum reflectance
Greater than or equal to 1.25%; preferably greater than or equal to 1.3.
The standard deviation S of the maximum reflectivity of the vitrinite is more than or equal to 0.2 and less than or equal to 0.35, and the preferable range is that S is more than or equal to 0.29 and less than or equal to 0.31.
The standard deviation criterion is added on the basis of the vitrinite average maximum reflectivity criterion, because when the standard deviation of the vitrinite maximum reflectivity of the blended coal is too small, namely less than 0.2, although the coke strength is not influenced, the service life of the coke oven is probably influenced by overlarge expansion pressure in the coking process. On the other hand, when the standard deviation of the vitrinite maximum reflectance of the blended coal is too large, i.e., more than 0.35, the strength of the coke refined from the blended coal may be deteriorated. Since the quality of the colloidal mass affects the coke in addition to the amount of colloidal mass, the maximum reflectance of the vitrinite group is indicative of the quality of the colloidal mass. When the standard deviation is too large, the distribution of the maximum reflectance of vitrinite of the blended coal is wide, and the quality of a colloidal body generated by the blended coal in the coking process is deteriorated, so that the strength of the coke is deteriorated.
And by combining production practice, the method is economical when the standard deviation of the maximum reflectivity of vitrinite of the blended coal is 0.3.
After the first target blended coal is obtained, in order to further improve the strength of coke production, the Gieseler fluidity of the first target blended coal can be detected, and whether the coke strength is good or not is predicted according to the Gieseler fluidity, wherein the specific scheme is as follows:
optionally, after determining the coal blending ratio of the first target blended coal, as shown in fig. 3, the coal blending method further includes:
s71: blending coal according to the coal blending ratio of the first target blended coal to obtain first target blended coal;
s72: acquiring the Gieseler fluidity of the first target blended coal;
s73: if the Kirschner flow of the first target blended coal is smaller than a preset value, adjusting the blending ratio of the first target blended coal to obtain a second target blended coal; and the Kirschner flow of the second target blended coal is greater than the preset value, and the average maximum reflectance of the vitrinite and the standard deviation of the maximum reflectance of the vitrinite meet the preset condition.
According to the scheme, on the premise that the average maximum reflectance of the vitrinite and the standard deviation of the maximum reflectance of the vitrinite meet the preset conditions, the coal blending ratio is further adjusted, specifically, the blending ratio of the coal to be selected with higher Gieseler fluidity is increased, so that the Gieseler fluidity of the second target blended coal, namely the final blended coal, is increased, and the strength indexes of the produced coke, such as cold strength M40, M10, post-reaction strength CSR and the like, are improved.
In the following, the scheme of the above embodiment is described with reference to specific real-time data:
in an alternative embodiment, the coal blending scheme of the above embodiment is applied to a coking plant, and the process is as follows:
(1) obtaining 7 coking coals to be selected required by the coal blending, and detecting the vitrinite maximum reflectivity of each coal to be selected;
(2) obtaining a volume inertia curve of each coking coal to be selected;
(3) determining a Gieseler fluidity reference value according to the required strength of the target coke, and selecting 100ddpm as the reference value;
(4) determining the volume inertia R of each coking coal to be selected according to the Gieseler fluidity reference value and the volume inertia curve of each coking coal to be selected100 iSee table 1 for details;
(5) according to the inert capacity R of each coking coal to be selected100 iPreliminarily formulating a set of matching scheme of the candidate blended coal, which comprises the following specific steps:
firstly, the capacity R is set100 iThe blending ratio of the coking coal to be selected is also shown in the table 1, and the blending ratio is mass percent:
calculating the maximum proportion of the weak caking coal as follows:
dweak caking coal max＝∑(R100 i×di)＝20％×10％+25％×20％+60％×5％+55％×20％＝21％；
Therefore, in the initially determined coal blending scheme, the maximum blending ratio of the weak caking coal is 21%, and the blending ratio of the weak caking coal is not more than 21% in the process of preparing the coal blending scheme. The weak caking coals include high metamorphic weak caking coals and low metamorphic weak caking coals, and 21% is allocated to the two types of coals:
bonding coal with low metamorphism degree: 6 percent of coking coal to be selected, 6 percent of high-metamorphic weak caking coal: the coking coal to be separated 7 is set to 15%. This is the preliminary coal blending protocol 1 (see table 1);
bonding coal with low metamorphism degree: the coking coal to be selected 6 is set to be 10 percent, the high-metamorphic-degree weak caking coal: the coking coal to be separated 7 is set to 11%. This is the preliminary coal blending protocol 2 (see table 1);
table 1: coal blending scheme table
In the above table, αmaxIs the Gieseler fluidity.
(6) Calculating the vitrinite average maximum reflectivity data of the initial scheme according to the coal blending ratio and the vitrinite maximum reflectivity of each coal to be selected
And standard deviation (S), calculated as:
scheme 1:
s is 0.29, and the condition is satisfied:
s is more than or equal to 0.35 and more than or equal to 0.2, and the coal blending scheme is proper;
scheme 2:
s is 0.29, and the condition is satisfied:
and S is more than or equal to 0.35 and more than or equal to 0.2, and the coal blending scheme is also suitable.
In yet another alternative embodiment, according to the coal blending scheme of the previous embodiment, a coal blending ratio of target blended coal is obtained, and the first target blended coal is obtained by blending coal according to the coal blending ratio.
The Gieseler fluidity alpha of the first target blended coal is found to be 35ddpm through detection, and the average maximum reflectivity of vitrinite is calculated
1.35% of coke cold strength M4087.1% of M106.3%, and the post-reaction intensity CSR is 69.1%. For improving the cold strength of cokeAccording to the coal preparation and blending scheme, the second target blended coal is obtained by improving the ratio of the coal to be selected with higher Gieseler fluidity. Calculating the vitrinite average maximum reflectivity of the second target blended coal
1.32%, less fluctuation, increase of detected Gieseler fluidity to 81ddpm, improvement of cold strength of coke, M4088.6% of M105.8%, and the intensity CSR after reaction is 69.9%, which is slightly improved.
Based on the same inventive concept of the previous embodiment, in yet another alternative embodiment, there is provided a system for coking and coal blending, comprising:
the obtaining module 10 is used for obtaining N kinds of coal to be selected and the Gieseler fluidity reference value; n is not less than 2 and is an integer; according to the N kinds of coal to be selected, obtaining a inertia-tolerant curve and a vitrinite maximum reflectivity of each kind of coal to be selected; the inertia containing curve comprises a mapping relation between the Kirschner fluidity of the mixed coal and the mixing proportion of the mixed coal, and the mixed coal is the mixture of the coal to be selected and the reference inert coal;
the first determining module 20 is configured to determine the volume inertness of each coal to be selected according to the kirschner fluidity reference value and the volume inertness curve of the coal to be selected;
a second determining module 30, configured to determine a blending ratio of the candidate blending coals according to the N types of coals to be selected and the inert capacity of each type of coal to be selected;
a third determining module 40, configured to determine a vitrinite average maximum reflectance and a vitrinite maximum reflectance standard deviation of the candidate blended coals according to the blending ratio of the candidate blended coals and the vitrinite maximum reflectance of each to-be-selected coal;
a fourth determining module 50, configured to determine, as the blending ratio of the first target blending coal, the blending ratio of the candidate blending coal for which the vitrinite average maximum reflectance and the vitrinite maximum reflectance standard deviation satisfy a preset condition.
Optionally, the second determining module is specifically configured to:
determining an initial coal blending ratio;
determining the maximum proportion of weak caking coal matched with the initial coal blending ratio according to the initial coal blending ratio and the inertness capacity of each coal to be selected in the initial coal blending ratio;
and adjusting the proportion of the low-metamorphic weak caking coal and/or the high-metamorphic weak caking coal in the N kinds of coal to be selected according to the maximum proportion of the weak caking coal to obtain the coal blending ratio of the candidate blending coal.
Optionally, the coal blending system further comprises an adjusting module, wherein the adjusting module is configured to:
blending coal according to the coal blending ratio of the first target blended coal to obtain first target blended coal;
acquiring the Gieseler fluidity of the first target blended coal;
if the Kirschner flow of the first target blended coal is smaller than a preset value, adjusting the blending ratio of the first target blended coal to obtain a second target blended coal; and the Kirschner flow of the second target blended coal is greater than the preset value, and the average maximum reflectance of the vitrinite and the standard deviation of the maximum reflectance of the vitrinite meet the preset condition.
Based on the same inventive concept of the foregoing embodiments, in yet another alternative embodiment, an industrial control device is provided, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor executes the program, the coal blending method steps of any one of the foregoing embodiments can be implemented.
Through one or more embodiments of the present invention, the present invention has the following advantageous effects or advantages:
the invention provides a coking and coal blending method, which is based on a plastic coking theory and performs coal blending from the perspective of the quantity and quality of a colloidal body formed by coal in a coking process; specifically, the adhesive property indexes are adopted: the Gieseler fluidity characterizes the number of the colloidal bodies, because the Gieseler fluidity can well characterize the properties of the colloidal bodies of medium and strong caking coal; then further obtaining a capacity-inertness curve of each coal to be selected, determining the capacity-inertness of each coal to be selected by combining a predetermined Kirschner mobility reference value, namely the capacity-inertness of the coal to be selected, and blending the coal according to the capacity-inertness capacity of each coal to be selected to obtain candidate blended coal, so that the defect that the identification capability of the caking index G value on the coal with strong caking property in a V-G coal blending method is poor is overcome, and the defect that the coal blending by adopting special coal with similar high activity-inertness ratio and low caking property cannot be accurately guided by the activity-inertness ratio obtained according to coal rock indexes is overcome; on the other hand, the vitrinite maximum reflectance is used as a lithofacies index, and the metamorphic grade of the coal can be accurately reflected, so that after candidate blended coal is obtained, the vitrinite average maximum reflectance and vitrinite maximum reflectance standard deviation of the candidate blended coal are calculated according to the blending coal ratio and the vitrinite maximum reflectance of each candidate coal, the metamorphic grade of the blended coal can be accurately represented, the quality of a colloidal body is measured, and the blending coal ratio of the candidate blended coal, of which the vitrinite average maximum reflectance and the vitrinite maximum reflectance standard deviation meet preset conditions, is determined as the blending coal ratio of the target blended coal. In general, by combining the methods, the aim of accurately blending coal by adopting less coal blending indexes is fulfilled, the obtained target blended coal realizes the unification of the caking property index and the lithofacies index, and the produced coke can well meet the production requirement of the current large-scale blast furnace.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A coking coal blending method is characterized by comprising the following steps:
acquiring N types of coal to be sorted and a Gieseler fluidity reference value; n is not less than 2 and is an integer;
according to the N kinds of coal to be selected, obtaining a volume inertia curve and a vitrinite maximum reflectivity of each kind of coal to be selected; the inertia containing curve comprises a mapping relation between the Kirschner fluidity of the mixed coal and the mixing proportion of the mixed coal, and the mixed coal is the mixture of the coal to be selected and the reference inert coal;
determining the volume inertness of each coal to be selected according to the Gieseler fluidity reference value and the volume inertness curve of the coal to be selected;
determining the coal blending ratio of the candidate blended coal according to the N kinds of coal to be selected and the inert capacity of each kind of coal to be selected;
determining the vitrinite average maximum reflectance and vitrinite maximum reflectance standard deviation of the candidate blended coals according to the blending ratio of the candidate blended coals and the vitrinite maximum reflectance of each to-be-selected coal;
and determining the coal blending ratio of the candidate blended coal, of which the vitrinite average maximum reflectivity and the vitrinite maximum reflectivity standard deviation meet preset conditions, as the coal blending ratio of the first target blended coal.
2. The coal blending method of claim 1, wherein the preset conditions comprise:
the vitrinite average maximum reflectance is greater than or equal to 1.25%;
the standard deviation of the maximum reflectivity of the vitrinite is greater than or equal to 0.2 and less than or equal to 0.35.
3. The coal blending method of claim 1, wherein the Gieseler fluidity reference value is determined by the following method:
acquiring the strength index of target coke; the strength index comprises at least one of crack resistance strength, wear resistance strength and strength after reaction;
and determining the Gieseler fluidity reference value according to the intensity index.
4. The coal blending method according to claim 1, wherein the inertness curve of each coal to be selected is determined according to the following method:
obtaining the coal to be selected and the reference inert coal;
mixing the coal to be selected with the reference inert coal according to M preset proportions to obtain M kinds of mixed coal; m >2 and is an integer;
performing fluidity test on each mixed coal to obtain the Gieseler fluidity of each mixed coal;
and determining a volume inertia curve of the coal to be selected according to the Gieseler fluidity of each kind of mixed coal and a preset proportion corresponding to the Gieseler fluidity of each kind of mixed coal.
5. The coal blending method according to claim 4, wherein the M preset ratios are determined according to the following method:
acquiring the Gieseler fluidity of the coal to be selected;
and determining the M preset proportions according to the Gieseler fluidity of the coal to be selected.
6. The coal blending method according to claim 5, wherein the determining the M preset proportions according to the Gieseler fluidity of the coal to be selected comprises:
if the Gieseler fluidity of the coal to be selected is greater than 10000ddpm, the mass part range of the coal to be selected is 100-50, and the mass part range of the reference inert coal is 0-50;
if the Gieseler fluidity of the coal to be selected is larger than 2500ddpm and smaller than or equal to 10000ddpm, the mass part range of the coal to be selected is 100-55, and the mass part range of the reference inert coal is 0-45;
if the Gieseler fluidity of the coal to be selected is greater than 500ddpm and less than or equal to 2500ddpm, the mass part range of the coal to be selected is 100-60, and the mass part range of the reference inert coal is 0-40;
if the Gieseler fluidity of the coal to be selected is greater than 100ddpm and less than or equal to 500ddpm, the mass part range of the coal to be selected is 100-75, and the mass part range of the reference inert coal is 0-25;
wherein the sum of the mass part of the coal to be selected and the mass part of the reference inert coal is 100.
7. The coal blending method according to claim 1, wherein the determining the coal blending ratio of the candidate blended coal according to the N kinds of coals to be selected and the inertness capacity of each kind of coal to be selected specifically comprises:
determining an initial coal blending ratio;
determining the maximum proportion of weak caking coal matched with the initial coal blending ratio according to the initial coal blending ratio and the inertness capacity of each coal to be selected in the initial coal blending ratio;
and adjusting the proportion of the low-metamorphic weak caking coal and/or the high-metamorphic weak caking coal in the N kinds of coal to be selected according to the maximum proportion of the weak caking coal to obtain the coal blending ratio of the candidate blending coal.
8. The coal blending method of claim 1, wherein after determining the coal blending ratio of the first target blended coal, the coal blending method further comprises:
blending coal according to the coal blending ratio of the first target blended coal to obtain first target blended coal;
acquiring the Gieseler fluidity of the first target blended coal;
if the Kirschner flow of the first target blended coal is smaller than a preset value, adjusting the blending ratio of the first target blended coal to obtain a second target blended coal; and the Kirschner flow of the second target blended coal is greater than the preset value, and the average maximum reflectance of the vitrinite and the standard deviation of the maximum reflectance of the vitrinite meet the preset condition.
9. A coking and coal blending system, characterized in that the coal blending system comprises:
the acquisition module is used for acquiring N types of coal to be selected and the Gieseler fluidity reference value; n is not less than 2 and is an integer; according to the N kinds of coal to be selected, obtaining a inertia-tolerant curve and a vitrinite maximum reflectivity of each kind of coal to be selected; the inertia containing curve comprises a mapping relation between the Kirschner fluidity of the mixed coal and the mixing proportion of the mixed coal, and the mixed coal is the mixture of the coal to be selected and the reference inert coal;
the first determining module is used for determining the volume inertness of each type of coal to be selected according to the Gieseler fluidity reference value and the volume inertness curve of the coal to be selected;
the second determining module is used for determining the coal blending ratio of the candidate blended coal according to the N kinds of coals to be selected and the inert capacity of each kind of coal to be selected;
the third determining module is used for determining the vitrinite average maximum reflectivity and vitrinite maximum reflectivity standard deviation of the candidate blended coal according to the blending ratio of the candidate blended coal and the vitrinite maximum reflectivity of each type of coal to be selected;
and the fourth determining module is used for determining the coal blending ratio of the candidate blending coal of which the vitrinite average maximum reflectivity and the vitrinite maximum reflectivity standard deviation meet the preset conditions as the coal blending ratio of the first target blending coal.
10. An industrial control device comprising a memory, a processor and a computer program stored on the memory and operable on the processor, wherein the processor when executing the program is operable to carry out the method steps of the coal blending method of any of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110955118.XA CN113684048B (en) | 2021-08-19 | 2021-08-19 | Coking coal blending method, coal blending system and industrial control equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110955118.XA CN113684048B (en) | 2021-08-19 | 2021-08-19 | Coking coal blending method, coal blending system and industrial control equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113684048A true CN113684048A (en) | 2021-11-23 |
| CN113684048B CN113684048B (en) | 2022-10-21 |
Family
ID=78580727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110955118.XA Active CN113684048B (en) | 2021-08-19 | 2021-08-19 | Coking coal blending method, coal blending system and industrial control equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113684048B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115247075A (en) * | 2022-07-08 | 2022-10-28 | 云南大为制焦有限公司 | Coking coal classification method, coking coal blending method and application |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54117501A (en) * | 1978-03-03 | 1979-09-12 | Nippon Steel Corp | Production of metallurgical coke from blend of many grades of coal |
| JPH09151380A (en) * | 1995-11-30 | 1997-06-10 | Kawasaki Steel Corp | Method for estimating strength of coke for blast furnace |
| KR20040021234A (en) * | 2002-09-03 | 2004-03-10 | 주식회사 포스코 | Preparation method for the strong coke |
| CN1749358A (en) * | 2005-09-30 | 2006-03-22 | 中冶焦耐工程技术有限公司 | Optimum system for distributing coal of coking controlled by computer |
| CN102618311A (en) * | 2012-04-18 | 2012-08-01 | 武汉钢铁(集团)公司 | Coking and coal blending method with participation of fat coal |
| CN103275740A (en) * | 2013-06-08 | 2013-09-04 | 武汉钢铁(集团)公司 | Evaluation method of fat coal quality |
| CN103279678A (en) * | 2013-06-08 | 2013-09-04 | 武汉钢铁(集团)公司 | Evaluation method of coal quality of coking coal with maximum Giseeler fluidity greater than 2000 ddpm |
| CN103555352A (en) * | 2013-11-05 | 2014-02-05 | 陕西陕焦化工有限公司 | Coal blending coking method of weakly caking coal |
| CN105316017A (en) * | 2014-06-09 | 2016-02-10 | 鞍钢股份有限公司 | Coal-petrographic coal blending method with vitrinite reflectance of coking coal as main index |
| CN110295049A (en) * | 2019-07-09 | 2019-10-01 | 鞍钢股份有限公司 | A kind of efficient coke making and coal blending method using complicated mixed coal |
| CN112521965A (en) * | 2020-12-22 | 2021-03-19 | 鞍钢集团北京研究院有限公司 | Rapid coal blending method |
-
2021
- 2021-08-19 CN CN202110955118.XA patent/CN113684048B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54117501A (en) * | 1978-03-03 | 1979-09-12 | Nippon Steel Corp | Production of metallurgical coke from blend of many grades of coal |
| JPH09151380A (en) * | 1995-11-30 | 1997-06-10 | Kawasaki Steel Corp | Method for estimating strength of coke for blast furnace |
| KR20040021234A (en) * | 2002-09-03 | 2004-03-10 | 주식회사 포스코 | Preparation method for the strong coke |
| CN1749358A (en) * | 2005-09-30 | 2006-03-22 | 中冶焦耐工程技术有限公司 | Optimum system for distributing coal of coking controlled by computer |
| CN102618311A (en) * | 2012-04-18 | 2012-08-01 | 武汉钢铁(集团)公司 | Coking and coal blending method with participation of fat coal |
| CN103275740A (en) * | 2013-06-08 | 2013-09-04 | 武汉钢铁(集团)公司 | Evaluation method of fat coal quality |
| CN103279678A (en) * | 2013-06-08 | 2013-09-04 | 武汉钢铁(集团)公司 | Evaluation method of coal quality of coking coal with maximum Giseeler fluidity greater than 2000 ddpm |
| CN103555352A (en) * | 2013-11-05 | 2014-02-05 | 陕西陕焦化工有限公司 | Coal blending coking method of weakly caking coal |
| CN105316017A (en) * | 2014-06-09 | 2016-02-10 | 鞍钢股份有限公司 | Coal-petrographic coal blending method with vitrinite reflectance of coking coal as main index |
| CN110295049A (en) * | 2019-07-09 | 2019-10-01 | 鞍钢股份有限公司 | A kind of efficient coke making and coal blending method using complicated mixed coal |
| CN112521965A (en) * | 2020-12-22 | 2021-03-19 | 鞍钢集团北京研究院有限公司 | Rapid coal blending method |
Non-Patent Citations (2)
| Title |
|---|
| 焦小赞 等: "第三成因因素指导配煤的初步研究", 《燃料与化工》 * |
| 胡跃: "开滦主力矿井煤质岩相分析与优化配煤炼焦的技术研究", 《中国优秀博硕士学位论文全文数据库（硕士）工程科技Ⅰ辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115247075A (en) * | 2022-07-08 | 2022-10-28 | 云南大为制焦有限公司 | Coking coal classification method, coking coal blending method and application |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113684048B (en) | 2022-10-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102559227B (en) | Method for coal blending coking through utilizing Gieseler fluidity index | |
| CN113684048B (en) | Coking coal blending method, coal blending system and industrial control equipment | |
| CN105316017B (en) | A kind of Blending of Coal Petrography method using coal for coking vitrinite reflectance as leading indicator | |
| CN102690669B (en) | Coking coal quality classification method and coal blending and coking method with participation of coking coal | |
| CN104484495A (en) | Coke particle size prediction method | |
| CN111117669B (en) | Method for distinguishing classification of coking coal types and application thereof | |
| AU2020231947B2 (en) | Evaluation method for coal, preparation method for blended coal, and production method for coke | |
| CN115851299A (en) | Method for reducing penetration distance of coal mixture, and method for producing coke | |
| CN109102035A (en) | A kind of coking coal multidimensional index similitude classification method based on clustering | |
| US10739285B2 (en) | Evaluating method for coal and producing method for coke | |
| Thompson et al. | Vitrinite reflectance as an indicator of coal metamorphism for cokemaking | |
| CN104804755A (en) | Coal blending method for coking 1/3 coking coal having solid softening temperature interval below 85 DEG C | |
| CN112521965A (en) | Rapid coal blending method | |
| CN116479195A (en) | Method for optimizing blast furnace injection coal blending based on coal rock parameters | |
| CN1173006C (en) | Method for coal blending coking by using coal petrography analysis | |
| CN105713632B (en) | Coal blending method mainly using fat coal | |
| CN104678075A (en) | Predicating method for abrasive resistance of coal-blending coking coke | |
| KR102299553B1 (en) | Prediction method for cold strength of coke | |
| CN105623697B (en) | The coking coal blending method that a kind of thin coking coal participates in | |
| CN104830360A (en) | Coal blending coking method of 1/3 coking coal with 34% or above of volatile | |
| CN106596890A (en) | Determination method for coking complicated mixing coal of same mark | |
| CN109439358B (en) | Classification and distribution method of coking coal with gelatinous layer with maximum thickness of 21-28 mm | |
| CN107557042B (en) | The method of high mixture ratio weakly caking coal control coke quality | |
| CN116337687A (en) | Coking coal caking index determination method based on granularity compensation | |
| CN104673345B (en) | Coal blending method based on coking property of coking coal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |