CN107557042B - The method of high mixture ratio weakly caking coal control coke quality - Google Patents
The method of high mixture ratio weakly caking coal control coke quality Download PDFInfo
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- CN107557042B CN107557042B CN201710918977.5A CN201710918977A CN107557042B CN 107557042 B CN107557042 B CN 107557042B CN 201710918977 A CN201710918977 A CN 201710918977A CN 107557042 B CN107557042 B CN 107557042B
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Abstract
The invention discloses a kind of method of high mixture ratio weakly caking coal control coke quality, include the following steps: 1) plastometer indice measurement；2) cooperation coal particle size control；3) the industrial index control of mixed coal；4) coking process state index；And 5) antimonate precipitation norm controlling.The present invention produces high grade coke to 6 meters or more top dress coke oven low costs, provide scientific and reasonable control method, by carrying out coordinated control to influence coke quality most critical factor antimonate precipitation and coking process state, under 6 meters or more coke oven top dress coke making process, when mixed coal coking coarse grain mosaic texture > 35%, weakly caking coal is 30~40% with dosage；When mixed coal coking coarse grain mosaic texture > 30~35%, weakly caking coal is 20~30% with dosage, gained coke CSR > 66%, M40> 86%, M10< 6.2%, meet 3000m3Large blast furnace demand.
Description
Technical field
The invention belongs to coal chemical technologies, and in particular to a kind of method of high mixture ratio weakly caking coal control coke quality.
Background technique
China is within the quite a long period, and blast furnace ironmaking is still prevailing technology, and coke quality is to blast furnace enlargement and ironmaking
Technological progress is most important.To meet smooth operation of furnace and enlargement development, coking industry forms the high-quality of polygamy scarcity of resources
The coal blending principle of coking coal, and the weak coking capacity coal adapted of low-cost resource reserves nearly 50% is less, and coal blending cost is caused to be in not
Under, it is seriously runed counter to current resources situation.Therefore, under the premise of the stabilization of coke quality, it is rich that low price, low ash, low-sulfur resource reserve are improved
Rich weak coking capacity coking coal adapted advantageously reduces coal blending cost, improves coke ash sulphur index, reduces blast furnace coke ratio, reduces
Carbon sulphur emissions.
Under the conditions of existing top fills coke making process, how to improve weak coking capacity coking coal adapted is that current coking industry faces
Significant technology issues.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of high mixture ratio weakly caking coal control coke quality method, with
The weak coking capacity coking coal of high proportion adapted fills coking by coke oven, gained coke CSR > 66%, M on 6 meters or more tops40> 86%, M10<
6.2%, meet the needs of large blast furnace Coke Quality.
In order to solve the above technical problems, The technical solution adopted by the invention is as follows:
1) plastometer indice measures: measurement coal plastometer indice, by the gel upper layer position recorded with temperature
The curve of degree variation is denoted as weakly caking coal in the coking coal of smooth down type, the weakly caking coal cover bottle coal, lean coal, meager lean coal with
And 1/3 coking coal of part；
2) cooperation coal particle size control: overall fineness control is 70~80%；
3) the industrial index control of mixed coal: volatile matter: 24~29%；Ash content and sulphur content are fixed according to each enterprise requirements.It is viscous
Connect index G value: 78~83；Maximum thick ness of plastic layer Y:15~19mm；
4) coking process state index: for the coal of logarithm lgMF > 3.0 of fluidity, weighting fluidity control is
∑XilgMFi: 1.0~1.5, wherein XiFor the adapted ratio of the coal of logarithm lgMF > 3.0 of i-th kind of fluidity；MFiIt is i-th
The fluidity of the coal of logarithm lgMF > 3.0 of kind fluidity；
5) antimonate precipitation norm controlling:
The coarse grain mosaic texture ratio of mixed coal subtract mixed coal fiber sheet structure proportion and mixed coal it is each to same
The sum of property structure proportion > 20%.
When mixed coal coking coarse grain mosaic texture > 35%, weakly caking coal adapted is up to 30-40%；
When mixed coal coking coarse grain mosaic texture > 30~35% (indicating to be less than or equal to 35% greater than 30%), weakly caking
Coal is with dosage control 20~30%.
The present invention have it is following the utility model has the advantages that
The present invention produces high grade coke to 6 meters or more top dress coke oven low costs, provides scientific and reasonable control method, leads to
It crosses and coordinated control, 6 meters or more coke ovens is carried out to influence coke quality most critical factor antimonate precipitation and coking process state
Under the dress coke making process of top, when mixed coal coking coarse grain mosaic texture > 35%, weakly caking coal adapted is up to 30-40%；Work as mixed coal
Coking coarse grain mosaic texture > 30~35%, weakly caking coal is with dosage control 20~30%, gained coke CSR > 66%, M40>
86%, M10< 6.2%, meet 3000m3Large blast furnace demand.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is described in further details.
The method of high mixture ratio weakly caking coal control coke quality of the invention, specifically comprises the following steps:
Step 1: plastometer indice measures: measurement coal plastometer indice, the gel upper layer position that will be recorded
The curve varied with temperature is denoted as weakly caking coal in the coking coal of smooth down type and carries out adapted；
Step 2: determining coking process state control coal and Con trolling index:
The coal of fluidity lgMF > 3.0 (gas rich coal, rich coal, 1/3 coking coal of part, coking coal) is weighted and is controlled, weighting control is met
Value ∑ X processedilgMFi: 1.0~1.5；
Step 3: antimonate precipitation norm controlling, the coarse grain mosaic texture of mixed coal, fiber laminated structure and each are adjusted
To same sex structure proportion, so that the coarse grain mosaic texture ratio of mixed coal-fiber sheet structure proportion-isotropic structure ratio
> 20%.
When mixed coal coking coarse grain mosaic texture ratio > 35%, weakly caking coal is with dosage up to 30% or more；
When mixed coal coking coarse grain mosaic texture ratio > 30~35%, weak bonding is with dosage control 20~30%.
Step 4: the industrial index of mixed coal controls:
Volatile matter: 24~29%；Caking index G value: 78~83；Maximum thick ness of plastic layer Y:15~19mm；Mixed coal is thin
Degree control 70~80%.
This method is to implement adapteds in 6 meters or more tops dress coke ovens, weak coking capacity coking coal adapted ratio up to 30% or more,
Coke CSR > 66%, M40> 86%, M10< 6.2%, meet large blast furnace demand.
Embodiment:
Coke-oven plant's coal for coking kind bottle coal (curve that gel upper layer position varies with temperature is in smooth down type,
Other single grade coals that do not point out then indicate that its corresponding curve is not in smooth down type), rich coal 1#, rich coal 2#, 1/3 coking coal 1#
(curve that gel upper layer position varies with temperature is in smooth down type), 1/3 coking coal 2# (fluidity lgMF > 3.0), coke
Coal, lean coal (curve that gel upper layer position varies with temperature is in smooth down type), specific targets are as follows:
1 single coal quality
2 single grade coal coking microstructure of table
Step 1: determining that bottle coal, 1/3 coking coal 1# and lean coal are weak coking capacity coking coals.
Step 2: determining the coal of fluidity lgMF > 3.0, i.e. 1/3 coking coal 2# and rich coal, 1/3 coking coal 2# and rich coal are being matched
It closes its in coal and weights fluidity ∑ XilgMFiControl is 1.0~1.5.
Step 3: antimonate precipitation norm controlling, coarse grain mosaic texture, the fiber laminated structure for adjusting mixed coal are (i.e. fine
Tie up structure and laminated structure) and isotropic structure ratio, coarse grain mosaic texture ratio-fiber sheet structure proportion-is respectively to same
Property structure proportion > 20%.When mixed coal coking coarse grain mosaic texture > 35%, weakly caking coal matches dosage up to 30% or more；When
Mixed coal coking coarse grain mosaic texture > 30~35%, weakly caking coal control 20%~30% with dosage.
Step 4: the industrial index control of mixed coal, volatile matter: 24~29%；Caking index G value: 78~83；Gelatinous layer
Maximum gauge Y:15~19mm；Mixed coal fineness control 70~80%.
This method is to implement adapteds in 6 meters or more tops dress coke ovens, weak coking capacity coking coal adapted ratio up to 30% or more,
Coke CSR > 66%, M40> 86%, M10< 6.2%, meet 3000m3Large blast furnace demand.
3 Coal Blending Schemes of table
Under each scheme, gained coke quality.
Cooperate coal quality and coke quality index under 4 different schemes of table
Scheme 1: meeting antimonate precipitation and range request, Thermal Properties of Coke CSR > 66%, M are crossed in coking40> 86%, M10<
6.2%.
Scheme 2: antimonate precipitation and coking process state index request, cold strength deterioration is not achieved.
Scheme 3: meeting antimonate precipitation and range request, Thermal Properties of Coke CSR > 66%, M are crossed in coking40> 86%, M10<
6.2%, and weakly caking coal dosage is up to 40%.
Scheme 4: coking process state index has an impact in limiting value, cold strength.
Scheme 5: meeting antimonate precipitation and range request, Thermal Properties of Coke CSR > 66%, M are crossed in coking40> 86%, M10<
6.2%.
Scheme 6: antimonate precipitation requirement, calorific intensity deterioration is not achieved.
Scheme 7: meeting antimonate precipitation and range request, Thermal Properties of Coke CSR > 66%, M are crossed in coking40> 86%, M10<
6.2%.
Scheme 8: coking process state index is excessively high, and cold strength has an impact.
Claims (1)
1. a kind of method of high mixture ratio weakly caking coal control coke quality, it is characterised in that: this method comprises the following steps:
1) plastometer indice measures: measurement coal plastometer indice becomes the gel upper layer position recorded with temperature
The curve of change is denoted as weakly caking coal in the coking coal of smooth down type；
2) cooperation coal particle size control: overall fineness control is 70~80%；
3) the industrial index control of mixed coal: volatile matter: 24~29%；Bonding index G value: 78~83；Maximum thick ness of plastic layer
Y:15~19mm；
4) coking process state index: for the coal of logarithm lgMF > 3.0 of fluidity, weighting fluidity control is ∑
XilgMFi: 1.0~1.5, wherein XiFor the adapted ratio of the coal of logarithm lgMF > 3.0 of i-th kind of fluidity；MFiIt is i-th kind
The fluidity of the coal of logarithm lgMF > 3.0 of fluidity；
5) antimonate precipitation norm controlling: the coarse grain mosaic texture ratio of mixed coal subtracts the fiber laminated structure ratio of mixed coal
The sum of example and the isotropic structure ratio of mixed coal > 20%；
And work as mixed coal coking coarse grain mosaic texture > 35%, weakly caking coal is 30~40% with dosage；
When mixed coal coking coarse grain mosaic texture > 30~35%, weakly caking coal is 20~30% with dosage.
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