CA1175004A - Coke production process - Google Patents

Abstract

DISCLOSURE The invention relates to a process for the manufacture of coke from constituents, part of which is non-or little coking. During the preparation of the mixture of coals to put in the oven, one agglomerates with the press, after addition of a pitch or bitumen with a KS point of about 70 to 85.degree.C, at least a part of the constituents, or reboiled monk part of the agglomerates obtained at a particle size such that 50% is of dimension less than 3 to 5 mm approximately and the agglomerates ground and optionally not ground are reincorporated into the mixture before placing in the oven.

Description

~ 175004 ~ The invention relates to a method for the manufacture of coke by charging mixtures of coals based on nOD or low-coking coals.
0 ~ has already proposed by the patent 5 French N ~ 265 397 to improve the quality of coke Obtain ~ u from low-coking carbons and increased it the loading density, not only by the single chage mela ~ ge of coking coals, but also by another means of artificial increase in den-10 sity, for example ~ by agglomeration of u ~ e part of the met dry diaper and gravity loading of a mixture of lets made and fine dry ~ This process ~ é-stops the pre-drying of coal fines.
By the French patent ~ 1 ~ 95 232 15 there is known a coking process, in which wet coal fines are agglomerated in the press, which cofection ~ e of agglomerates presentaDt burr breaking irregularly on leaving the press, after which OD bakes gravity into the mixture of ag-20 glomerates more or less fractured then presenting an increased density.
We also know by patent French N 1,176,762 a process in which re part of the coal fines ~ eDfourn and we 25 eDfourDe u ~ mixture of agglomerates obtained with a guarantee at most equal by weight of coal fines not agglomerated.
~ e object of the invention is to propo-be an improved process, of the type described in the patent 30 French vet N 1 265 3g7 ~ allowing, compared to the processes of the prior art, either to increase the quantity charcoal tee ~ little coking that can be incorporated into mixture, or, for a given mixture, to improve the mechanical strength of coke. ~ e process also adapts 35 good in the oven for fine fines than fine pre-heated ~. In the case of fine fines, an additional goal me ~ shut up of the invention may be obtaining coke iron and steel from mixtures containing coal little coking without having to resort to the technique of .

preheating ~.
~ e goal of i ~ vention is reached in a process for making coke in the ~ uel on prepares a mixture based on fines of coal kills, of grain sizes such as 80 ~ o or dime ~ -iL iion less than about 2 mm, said mixture compre-with no or little coking coals of go index ~ -~ Loudly more than 5 ~ process in which ~ during of the pr ~ preparation of the mixture, it is agglomerated with the press ~
after adding a pitch or bitumen of point ~ S of approx.
ron 70 to 85C ~ at least part of the constituents to state of tops ~ to incorporate or reincorporate to the mixture and in which the mixture is supplied as obtained in a coke oven cell, by the fact that during preparation, at least one part is rewound tie of agglomerates ~ s to a particle size such as 50/0 or dime ~ sion less than 3 to 5 mm approximately.
U ~ e minimum quantity of binder, ~ is at least 5%, is highly preferable for ~ ue ¢ o ~ agglomerates serve their cohesio ~ during my ~ u-temptations. In the description which follows, we e ~ tend by grinding (or regrinding) any process of ~ ragmentatio in which the material to be fragmented is subjected to oo ~ compression tracks or percussion ~ leading drive, as is known in 80i ~ has a controlled particle size lée. So ~ the size of the rebro particles ~ age ; is distributed according to a spread granulometry and regular which allows an optimal filling of the cokeO De pluG, this controlled regrinding mode allows to standardize the loading density, eliminating eL
import local variatios of density in char-gement that can be observed in contact with agglomerates and which can be harmful to the quality of cokeO
~ es advantages of rebro ~ age of agglomerates are surpi ~ eantsO We could have peDser ~ e indeed, that the regrinding1 destroying the compact building created by the agglomeration ~ ion, would lose the benefits increased loading density ~ ui cons-tituates the main lesson of previous patents, including ment of the French patent ~ 1,265,397 and other patents subsequent vets using the soft coal technique 5 lé'O Without being able to give a scientific explanation fique, everything happens as if the rebro ~ age was driving fragmentation of the compacted mixture, cha ~ ue fragment product keeping the mark of compaction whose effect beneficial on the quality of coke would be found not only-10 preserved but increased O We observe that the decrease in loading density following the crushing the agglomerates brings, surprisingly ~, further improvement in mechanical strength that coke gets ~ u ~.
~ a lesson of the invention is also very surprising if we refer to the lessons of the bre-French vet N 2 121 021 ~ shows that the agglomeration to coal tar pitch having a softening point taken between 40 and 100C does not solve the problem fo ~ -20 daimental of the coking of low coking coals.
This is why the patent had proposed an agglomeration with a bituminous substance with a high softening point probably between 100 and 400C. ~ ais, besides that it is a special-costly substance to obtain, the 25 process requires heat treatment compli ~ ué charcoal which we want to improve the properties té ~ cokéfiantes.

According to several variants pos-sables of the invention, the agglomerates can be regrind 30 before or after incorporation or reincorporation into the diaper, you can agglomerate all of at least one of the constituents not or little coked ~ iants av ~ nt incorporation to the mixture. You can also mix all the ingredients killing, agglomerate the whole mixture and grind it again 35 totally.
According to one embodiment, we .

re-binds the agglomerates to the initial particle size of the coal fines.
According to one embodiment, we agglomerates the fines to be agglomerated in the wet state, 5 to 8 to 1 ~ / o ~ after which the mixture is baked by gra-quickly.
According to a variant, we all mix the constituents, o ~ preheat ~ e all the mixture above of 100C and at least part of it is agglomerated than o ~
10 rebra ava ~ t reincorporation. It is also possible agglomerate all the preheated mixture ~ é before grinding at least some or even all.
According to one embodiment, grinds wet agglomerates, mix them QUX fine 15 wet no ~ agglomerated and incorporated into the mixture provide a quantity of light oil, of the order of 0.1 0.5%.
Other features and advantages ges emerge from the description of the examples set out 20 below, embodiments of the method according to the invention.
ventîon.
In what follows the quality of the co-kes obtained ~ will be characterized by the MICUM indices and / or IRSID standardized and well known to specialists. However 25 In the following, OD will recall below how to interpret these - indicesO
~ has mechanical strength of coke is usually characterized by the ~ ICUM test (NF standard ~ 03020) and by the IRSID test (standard ~ F M03023). These are 30 know consist in submitting a sample of coke ~ desrotations in a drum with a horizontal axis and measuring the percentage of refusal and passing of coke treated on colanders of given opening. We characterize after test :
35 - the percentage of coke greater than 40 mm W this is the indi-this M40 or I40 which is all the higher as the resistance tance to fragmentation or impact resistance of coke is greater ~
- the percentage of coke in ~ less than 10 mm: this is the index ~ 0 or I10 which is all the more ~ low as abrasion resistance or cohesion of coke is better, - the percentage of coke greater than 20 mm: this the I20 index which increases with the cohesion of the coke.
~ es desired values for these dif-fére ~ s inaices are generally as follows:
~ 40 ~ 75-80 O ~ 7- 9 I40 ~ 40 20 ~
I10 ~ 20-22 For a better understanding of 5 examples, coals with little or no coking been spotted by the if ~ From ~.
~ es essays on lesguels the ex-the following pls based were all ~ aits with a coal tar ES 79, ~ V 60 or petroleum bitumen ES 72 ~ MV 71 the point ES given in C by the ~
sai Eraimer-Sar ~ ow described in the Manuel du ~ aboratoire rou-tier in the collection of ~ central aboratory of ~ Ponts et Chaussées (p. 277 ~ Dunod editor), and MV designating the tau ~ of pure volatile matter expressed in%.

- ~ XEMELE ~ I to III -We first carried out tests constituting the first three examples in which we have press-bonded ~ wheels taDgentes molding machines eD
presence of 8% of pitch the poorly coking constituents po ~ r get chipboard ~ 40 g ~ o ~ has regrinded 117500 ~

agglomerate ~ s thus obtained and the fines of the regrind with coking coals in the form of fines crushed, after which the mixture is thus baked d in a coke oven cell. Comparative tests 5 have 8t8 done each time first with all the agglomerates whole, as it is known, then with the agglomerates regrind, as it has just been said. In these first three examples we used eight coals designated from A to H, in which the coals designated by F, G, H present 10 little or no suitability for coking.
Coal reference Index ~ V on pure Swelling index _________________ _________________ ____________________ A 20.8 5 1/2 B 20.9 7 1/2 C 19.8 8 1/2 C 20.1 9 E 24.0 8 1/2 F ~ 30.5 1 1/2 G ~ 36 3 H ~
The results of the cooking tests are summarized shown in Table 1.
'RABLE 1 Examples I II I ~ I
. : 25% A) ~ fines: 20% B) J crushed fines 32% B) fines Cclmposltlon dU: 40% B) ~ crushed: 2096 D) L 80% <2mm: 21% C) crushed lf lé: 109 ~ C) ~ 809 ~ <2mm: 609 ~ G (agglc ~ néré): 7% D) 80% <2mm er ourr: 25% F (aggregated areas):: 10% E) ::: 30% H (agglomerates) : balls: balls: balls: balls: balls: balls : whole: rebroy8s: whole: regrind: whole: regrind Ref8rehce: (proc ~: (irmen-: (proc-: (irmen-: (proc8-: (irn ~ en-: d: tion): d8: tion): d: tion) : known): 84.2% <2mm: known): 80% <2mm: known): 80% ~ 2mm ::::::
Quality of coke coke Hint) M40. 81.3 86.2 sablteli 80.2 80.4. 89.2 MICUM) M10: 8.1: 6.6:: 9.6: 9.3: 6.6 ::::::.

., ~ ".

~ 175004 In the three examples I to III, the pro-cede according to the invention leads to a very improvement net of the mechanical resistance indices of the cocke by compared to known process.

EXAMPLE IV -A mixture of coals containing one percent high level of poorly coking coal was placed in known loading methods and in the process according to the invention where the wet load was fully agglomerated turned into balls by means of a press with molding wheels conventional in the presence of 6% petroleum bitumen and where 50% of the balls were roughly shredded.
The main characteristics of coals used are given below:
Reference MV index Expansion index Inter-code carbon pure swelling ~ national _ I ~ 34.0 3 -20,621 J 23.6 9 +36 433 K 30.0 7 1/2 +46 533 The main results of the coke tests ~ ' . . . . _ _ _.
Known loading methods Method according to the invention tion ~ from fines 5 boyees preparation ~ i ~ psrtir de 150 ~ whole balls 37.2% fine 82.1% <2 mins 36% <
62.8% cannonballs Composition ~ I% 6 ~ 60 60 65 du) J% 20 20 20 17.5 10 mix) K ~ 20 20 20 17.5 Granul0 ~ é-)> 80mn96 13.1 10.8 5.4 6.1 sort of)> 40 ~ 80,069.8 65.0 69.5 coke) ~ 20mm ~ 85,796.7 94.5 93.8 .

Indices) M40 76,468.9 70.1 80.3 15 MICUM) M10 12.68.4 8.3 7.7 . .
Indices) I40 45,832.7 34.7 49.0 IRSID) 120 70,874.8 76.0 76.8 ) I10 28,221.7 21.6 21.0 The values of the mechanical strength indices that coke obtained with the process according to the invention are overall better than those relating to modes of known loading, and this although the proportion of slightly coking coal in the mixture is higher in the process according to the invention.
EXAMPLES V and VI -A mixture of coals containing one percent high level of unsafe coal was placed in different loading techniques, including charging mode according to the invention in which the wet load has ét8 fully agglomerated by means of a 3-wheel press 30 conventional molding machines in the presence of 6 ~ of petroleum bitumen, and in which all the agglomerates have been regrind (Example V) with a relatively coarse particle size before being loaded into the cell of the 3 coke oven. In Ex ~ ompleted VI
we only regrind part of the agglomerates to a 35 degrees of fineness close to that of fine crushed at the start.

vs , . ~

The same coals as in Example IV
have been used. The particle size conditions were the following for each column in Table 3 corresponding to the preparation techniques mentioned there:
100% crushed fines: 85.1 ~ ~ 2 mm - mixed load: 83.2% ~ 2 mm 100% whole balls: 82.1% <2 mm process according to the invention: 83.3% <2 mm Granulometry of the regrind balls:
56.3 ~ ~ 5mm 37.9% ~ 2mm 94.6% <5 mm 80 ~ <2 mm Table 3 gives the results of the tests.

. . ........ -., Known loading methods Method according to the invention ; _ _ _ Example V Example VI
_ ~
100% technique 100% mixed charge (100% cannonballs (50% cannonballs) preparation ~ crushed (37.2% fine balls ~ regrind (50% balls regrind .
I% 60 60 60 65 65 J ~ 20 20 20 17.5 17.5 K ~ 20 20 20 17.5 17.5 ~ 80 mm% 13.1 10.8 5.4 14.8 10.0 Coke)> 40 mm% 80.0 69.8 65.0 77.3 75.5 (~ 20 mm% 85.7 96.7 94.5 94.0 96.1 Indices) M4076.4 68.9 70.1 80.8 75.3 MICUM lM10 12.6 8.4 8.3 9.5 8.9 . Indices (14,045.8 32.7 34.7 50.3 47.8 : IRSID) I20 70.8 74.8 76.0 76.9 76.4 (I10 28.2 21.7 21.6 20.8 21.8 The previous results show the advantages of the method according to Example V of the invention which provides the best characteristics of coke in presence of a higher percentage of type coal ~ brand new, while obtaining, in Example VI, the results - acceptable condition despite the high percentage of bad Coal I. In all cases, the results of the process according to the invention are clearly better than the results `states obtained in known processes.
. ~

~ 175004 - EXE ~ VII -We will now present a case of ap-application of the method according to the invention in which the all of the coke dough is agglomerated using of a conventional molding wheel press and in which all the agglomerates are regrind to the same particle size tr ~ e than that of the fine crushed at the start, before loading in the ~ our coke. ~ the trials have been co ~ -duits with a mixture containing a certain proportion un-coking coal of the blazing fatty type which does not not allow to obtain an acceptable quality coke in known loading modes.
~ the tests were carried out in the operating conditions described in connection with the better examples set out above.
The characteristics of the coals used were as follows ~
harboD Quality I ~ dice Dilata Index- Code i ~ -MV mark on swelling terna- tion - '~ p, ur bional I * flaml ~ a ~ t graA 34 ~ 0 3 -20 621 J bold a ¢ oke 23 ~ 6 9 ~ 36 433 coke fat 38 ~ 5 8 1/2 +134 534 coke fat 30 ~ 0 7 1/2 +46 533 ~ the grain size codes were as follows for each of the columns in the Table 4 corresponding to the charging techniques mentioned there:
100% crushed fines: 82 ~ 8% C 2 mm mixed load: 81 ~ 6% C 2 mm 100% whole balls: 81.2% 2 mm invention: 81 ~ 2% ~ 2 mm Shredded cannonballs: 82.1% ~ 2 mm ~ e ~ ableau 4 gives the result of tests.

25% formula I
50% K blend Technical Charging methods known! Invention 100% fine mixed load 100% canned balls crushed (70% whole fine, crushed _) 30% cannonballs (> 80 mm% 42.5 36.9 17.4 38.8 ; Coke) ~ 40 mm% 91.5 91.7 86.8 91.3 (> 20 mm% 95.2 97.4 96.6 95.5 Indices) M4074.9 73.6 74.7 73.3 MICUM (M10 10.6 8.9 9.0 8.7 Indices (140,0.2 41.9 37.0 46.0 'IRSID) I20 67.4 71.2 70.9 73.9 (11029.6 25.9 25.9 23.5 The implementation of the process according to the invention is accompanied by a general improvement in the indices of mechanical strength of coke. In other words, by reasoning for equal coke quality, the process according to the invention increases the proportion of poorly coking coal blazingly fatty in coke dough.
In Examples I ~ VII, all charges were placed in the oven by gravity. The operation is performed by known means.
In Examples IV ~ VII we deal with coal humidity and the water content of the charges placed in the process according to the invention varied from 6 to 7.5%.
- EXAMPLES VIII and IX -; 35 The cok ~ faction tests described !

"~

~ 17S004 Examples IV and V were completed with a test performs in the variant of the method according to the invention o ~ the mixture was preheated to 150C, then agglomerated with 6 ~ pitch of coal tar and o ~ 50% of agglomerates have been shredded to a coarse particle size : characterized by 50% passing through a 2 mm sieve (Example-ple VIII). In Example IX the mixture of coals was preheated, then agglomerated in the presence of 6% pitch of coal tar by means of a wheel press molding machines; a fraction representing 50% of the agglomerates was reground approximately at the particle size of fine crushed feed, characterized by a percentage passing through a 2 mm sieve of about 80%.
The particle size conditions were the following for each column in Table 5 corresponding to the preparation techniques mentioned therein:

Starting fines 100 ~ preheated fines: 90.7% <2 mm wet mixed load: 83.2% <2 mm 100 ~ wet balls: 82.1 ~ <2 mm Example VIII: 82.5% <2 mm Example IX: 86.8% <2 mm Regrinded cannonballs:
: Example VIII: 56.6% <5 mm 38.2% <2 mm Example IX: 91.7% <5 mm 75.8% <2 mm Charging temperatures:
100% preheated dines: 245C
Example VIII: 119C
Example IX: 88C
The results are collected in the Table 5.
X

Reference Known loading methods Procedure according to the vention Example ~ VIII Example IX _ 100% fine technique 100% mixed charge (50 ~ balls (50% pre-wet balls preheated balls pr ~ heated heated preparations (37.2% wet fines (50 ~ balls (50% balls) (62.8 ~ whole balls (preheated ~ s (preheated 1 (rebroyes (rebroyes _ 10 I ~% 60 60` 60 65 65 J% 20 20 20 17.5 17.5 K% 20 20 20 17.5 17.5 (> 80mm% 10.2 10.85.4 7.3 6.9 Coke) (> 40mm% 79.5 69,865.0 72.2 71.6 .)> 20mm% 92.5 96,794.5 94.6 95.4 L

Indices) M40 78.1 68.970.1 77.8 77.9 MICUM (M10 9.5 8.48.3 8.1 6.1 Indices) ~ 40 50.1 32.734.7 No 51.6 IRSID (I20 76.5 74,876.0 80.0 . ) I10 22.1 21.721.6 measured ~ 18.3 _ Example VIII of the process according to the invention achieves the best compromise insofar as it ~
makes it possible to obtain a coke having both good resistance ~ fragmentation (M40) and good resistance abrasion resistance (M10). Results of the Example IX clearly show the advantages of the process according to the invention on the mechanical properties of coke.
The coke produced has in particular a resistance to very high abrasion, despite the presence in the charge loaded with a high proportion of coal deemed not to be coking.

- ~, 7 ' /

~ 175004 EX -A mixture containing a quantity very high charcoal ~ low coking type fat was e ~ four ~ é in the charging modes ~ t con ~ us and da ~ s the method according to the inventio ~ for which the entire mixture of coals preheated to 150C
was agglomerated at this temperature in the presence of ~ / 0 pitch and for which the agglomerates o ~ t been rebro ~ és ~ roughly at a particle size characterized by a percentage passing from 48 ~ 9fi to the 2 mm sieve (modu-AFNOR N 35).
~ es granulometry conditions ini-tiale des fines props ~ t respectively for each technique ~ du ~ ableau 6:
fine bro ~ preheated: 82 ~ 8% ~ 2 mm ball ~ wet ~: 79 ~ 8 / o ~ 2 mm pre-heated balls: 83 ~ 2% <2 mm reground balls: 83 ~ D <2 mm ~ es e ~ sai ~ were made dan ~
the ~ conditio ~ s de ¢ rite ~ about Example V below ~ us, and the same coal ~ were used.
~ e ~ ableau 6 gives the results from ~

. ~

Reference Known loading methods Procedure vention S Fine technique ~ ground 100% 100% 100 ~ balls preparation preheated balls balls pr ~ - preheated hu ~ idesheatedbrushed Temperature ; 272C 118C 108C
. . .
I% 80 80 80 80 J% 10 10 10 10 K% _ 10 10 10 10 (> 80 mm% 9.8 9.5 7.9 7.2 ~ oke)> 40 mm% 72.9 64.7 63.9 69.7 (> 20 mm% 87.0 94.3 95.3 94.2 ... .___ Index) M4075.4 68.1 67.6 71.2 MICUM) M1014.6 9.2 8.8 8.5 ~, Index) I40no 32.7 36.7 42.0 IRSID (I20 determined 72.9 73.4 75.1 ) ~ 10 _ 24.5 24.3 22.6 Only the proc ~ die according to the invention produces coke of acceptable quality for the blast furnace from a mixture containing however 80% low coking charcoal of the flamba ~ fatty type.
EXAMPLE XI -In this example, we loaded a load containing 100% of a low-coking type coal demi-gras with 8% tar pitch of coal. In the absence of pitch, this coal put in the oven only practically does not melt and delivers a powdery coke unsuitable for any use. In the presence of pitch, this coal gives a fairly well-melted coke in known loading modes, and we will see that the method according to the invention makes it possible to 35 manufacture under these conditions a high quality coke.
In the procedure according to the invention, the charbo ~ was preheated to 150C ag ~ hot lomé
in the presence of 8% pitch using a pre ~ se on wheels conventional molding machines and re-ground in a mill grades to a degree of finesse characterized by a percentage passage level 94.8% with a 2 mm sieve (module AFNOR N 35).
~ es characteristi ~ ues of this charbo ~
(mark ~ *) so ~ t the following:
Quality MV Index Expansion Index Code on ur ~ nfleme ~ t% i ~ ternational half-bold 17 ~ 0 3 -18 321 ~ e ~ particle size conditions ini- i tiale ~ fines were respectively for each techniques of ~ ableau 7:
100% ~ ine8 wet 88 ~ 7% <2 mm 100 ~ / o fine preheated ~ 94 ~ 7% ~ 2 mm 10 ~ / o preheated balls ~ é8 88 ~ 7% ~ 2 mm 100% ground balls 95% C 2 mm ~ e ~ ableau 7 presents the re ~ ultat ~
of ~ test ~ of coking in oven 400 kg, obtained ~ ~ ur the mixture containing 92% of coal M and 8% of pitch.

`\
, \

. TABLE 7 !
Reference Known loading methods Invention 100% fine 100% fine technique 100% balls 100% balls.
preheated wet preparation preheated preheated whole ground again.
~ temperature of / 250C 250C 160C
preheating ~ literature oven / 135C 185C 95C
.
(~ 80 mm% 49.0 44.4 22.2 35.3 Coke)> 40 mm% 86.1 87.4 78.6 86.1 (> 20 mm ~ 91.3 92.8 90.8 91.5 Indices) M40 80.2 80.8 73.6 82.0 MICUM) M10 9.7 9.4 10.6 8.9 . Indices) (T40 48.5 46.4 38.4 58.0 :) I20 68.0 68.6 67.3 75.4 . (I10 30.0 30.2 29.2 j23.2, The advantage of the method according to the The main focus is on improving the cohesion of the coke which is very appreciable in the example present.
In the different variants of the We therefore implemented successively the following techniques:
~ agglomeration of part of a mixture in the state of fines and re-grinding of the agglomerates (Example-ples I ~ III), agglomeration ~ ration of a mixture of fines wet. crushed and regrind of part of the agglomerates res has a granulometry more coarse than the fines starting grinds (Example IV), agglomeration of a met swath of crushed fine fines and re-grinding of the total lity of agglomerates with a coarser particle size that the starting coal fines (Example V), agglomerated ration of a mixture of crushed fine fines and rebroya-ge of part of the agglomerates at the same gra ~ ulometry than that of the initial fine crushed products (Example VI), agglomeration ~ of a mixture of crushed fine fines and regrind all the agglomerates to the same grain size than that of the initial crushed fines (Example VII), ag ~ lomeration of a mixture of fines crushed preheated and regrind part of the ag-glomerates has a coarser particle size than fi ~ es crushed deparb (example VIII), agglomeration of a mixture of preheated crushed fines and regrinding of all the agglomerates at a more granulometry coarse than the initial crushed fines (Example X), agglomeration of a mixture of preheated crushed fines fairies and rebro ~ age of part of the agglomerates at the same size as that of the fine crushed at the start (Example IE), agglomeration of a mixture of fines crushed preheated and regrind all of the agglomerated to the same particle size as that of the fines crushed at the start (Example XI).

~ 8

Claims

1) Coke manufacturing process in which a mixture based on fines of constituent coals, with a particle size such as 80%
either of dimension less than approximately 2 mm, said me-diaper including coals with little or no coking with a swelling index of at most 5, process in which, during the preparation of the mixture, agglo-mother to the press, after adding a pitch or bitumen from KS point of around 70 to 85 ° C, at least some of the constituents in the form of fines, for incorporating it or reincorporate it into the mixture and put it in the oven the aini mixture obtained in a coke oven cell, in which during the preparation of the mixture, scrapes back at least part of the agglomerates to a granular lometry such that 50% is less than 3 to 5 mm approximately.
2) Method according to claim 1, in which the part of the constituents is agglomerated agglomerate after adding at least 5% pitch or bitumen.
3) Method according to claim 1, in which the agglomerates are rewound before incorporation ration or reincorporation into the mixture.
4) Method according to claim 1, in which the agglomerates are rewound after incorporation tion or reincorporation into the mixture.

5) Method according to any one of claims 1 to 3, in which the agglomeration is all of at least one of the constituents not or only slightly kefiants before incorporation into the mixture.

6) Method according to claim 1, in which all the constituents are mixed and agglomerates the entire mixture and is rewound completely lement.

7) Method according to any one of claims 1 to 3, in which the clearly at the initial particle size of the coal fines good.

8) Method according to claim 1, in which the fines to be agglomerated are agglomerated at wet, up to about 8-10% water.

9) Method according to any one of claims 1 to 3, in which the gravity mixing.

10) Method according to claim 1 in which we mix all the constituents, we pre-heats the whole mixture above 100 ° C and agglomerates at least a part that is rebrapped before reincorporation.

11) Method according to claim 10, in which the entire preheated mixture is agglomerated before regrinding at least in part.

12) Method according to any one of claims 1 to 3, in which all agglomerates.

13) Method according to claim 8, in which wet agglomerates are rewound, mix them with non-agglomerated moist fines and incorporate pore the mixture to bake a quantity of light oil, on the order of 0.1 to 0.5%.

14) Method according to any one of claims 4, 6 and 8, in which the clearly at the initial particle size of the coal fines.

15) Method according to any one of claims 4,6 and 8, in which the gravity mixing.

16) Method according to any one of Claims 4, 6 and 8, in which the all agglomerates.

17) Method according to any one of claims 2, 3 and 4, wherein all of the constituents, the whole mixture is preheated above 100 ° C and agglomerates at least part which is re-embossed before reincorporation.
18) Method according to any one of claims 4, 6 and 8, wherein all of the constituents, the whole mixture is preheated above 100 ° C and agglomerates at least part which is re-embossed before reincorporation.