US3728229A - Process for the manufacture of abrasion-resistant shaped coke - Google Patents
Process for the manufacture of abrasion-resistant shaped coke Download PDFInfo
- Publication number
- US3728229A US3728229A US00059133A US3728229DA US3728229A US 3728229 A US3728229 A US 3728229A US 00059133 A US00059133 A US 00059133A US 3728229D A US3728229D A US 3728229DA US 3728229 A US3728229 A US 3728229A
- Authority
- US
- United States
- Prior art keywords
- briquettes
- bath
- coke
- temperature
- coking
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title abstract description 17
- 239000000571 coke Substances 0.000 title description 23
- 238000004519 manufacturing process Methods 0.000 title description 9
- 238000005299 abrasion Methods 0.000 title description 8
- 238000004939 coking Methods 0.000 abstract description 22
- 239000003245 coal Substances 0.000 abstract description 9
- 239000000203 mixture Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 11
- 239000011295 pitch Substances 0.000 description 11
- 239000004576 sand Substances 0.000 description 11
- 239000007789 gas Substances 0.000 description 6
- 229930195733 hydrocarbon Natural products 0.000 description 6
- 150000002430 hydrocarbons Chemical class 0.000 description 6
- 239000011280 coal tar Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000003039 volatile agent Substances 0.000 description 5
- 239000010426 asphalt Substances 0.000 description 4
- 238000007654 immersion Methods 0.000 description 4
- 239000004484 Briquette Substances 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000002802 bituminous coal Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- BHELIUBJHYAEDK-OAIUPTLZSA-N Aspoxicillin Chemical compound C1([C@H](C(=O)N[C@@H]2C(N3[C@H](C(C)(C)S[C@@H]32)C(O)=O)=O)NC(=O)[C@H](N)CC(=O)NC)=CC=C(O)C=C1 BHELIUBJHYAEDK-OAIUPTLZSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011294 coal tar pitch Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
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
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/08—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form in the form of briquettes, lumps and the like
Definitions
- a process which is well known provides for the manufacture of shaped coke on a very economical basis by bringing together one-third portion of bituminous coal and two-thirds of coke.
- the joining of the two materials is carried out in the pressing operation.
- the briquettes leave the presses at a temperature of about 400 C. and are then conveyed to the sand coker wherein they are converted to coke.
- This process suffers from the disadvantage that the abrasion resistance of the material is frequently inadequate for the purpose intended; this is particularly the case during transport as a result of which problems with dusting frequently occur.
- An object of the present invention is a manufacturing process which results in a coke which is abrasion-resistant and relatively dust-free in handling. Another object of the invention is the manufacture of coke briquettes economically and at high speed. Still another object of the invention is the manufacture of shaped coke which retains its shape and is not disrupted or fractured during the coking operation.
- shaped coking coal emerges from hot presses at a temperature between 400 C. and 450 C.
- This coal is transferred to a bath of hydrocarbon oil or molten pitch in which the shaped pieces are given a coating and are then transferred to a sand coker at a temperature of 900 to 1200 C.
- the shaped pieces on leaving the presses are preferably held in a chamber insulated against heat loss for a period of 1 to minutes in order to permit evolution of volatiles in the original composition.
- the pretreatment consisting of holding the briquettes at the high temperature for the stated 1 to 5 minute period and the coating by immersion in the hydrocarbon bath are effective in preventing fracture of the shaped pieces during the coking operation and results in shaped coke which is strongly abrasion resistant.
- the single figure is a schematic diagram showing the hot presses, the thermally insulated chamber, the coating bath and a sand-coker.
- suitable medium for the bath is any material which is liquid at a temperature between ZOO-450 C. and which on coking can comprise a framework for the coking operation itself.
- Examples are coal tar, coal tar pitch and the bitumen residue from petroleum oil.
- a preferred impregnant IS the distillation product which accumulates during production of the material used for the hot briquetting. All of these products are strongly absorbed by the hot briquettes so that the briquettes during their transport from the bath to the sand coker present a dry appearance.
- the apparatus necessary for carrying out the process according to the invention is shown in the figure. Briquettes at a temperature of 400 to 450 C. are taken from the presses at 1 by the conveyor 2. The conveyor 2 first passes through the chamber 3 which is insulated against heat loss and, if necessary, is heated. While within the chamber for a period of 1 to 5 minutes the briquettes contmue to outgas until the rate of evolution is negligible.
- the conveyor 2 first passes through the chamber 3 which is insulated against heat loss and, if necessary, is heated. While within the chamber for a period of 1 to 5 minutes the briquettes contmue to outgas until the rate of evolution is negligible.
- the conveyor then transfers the briquettes to the bath 4 containing a molten pitch or bitumen where the briquettes are impregnated and coated.
- the briquettes are next taken from the bath by means of the perforated belt conveyor 5 and transferred to an elevator 6.
- the elevator lifts the briquettes to the top of the shaft furnace 7 where the briquettes encounter the granular heat carrier which will effect the coking.
- the briquettes pass through the shaft furnace 7 in about 40 minutes.
- Hot briquettes comprised of 25% by weight of a baking coal (28% volatile content) and 75% by weight of fine coke particles (5% volatile content) at a temperature of about 450 C. were passed through a bath of coal tar preheated to 400 C. By means of continual replacement of the consumed binder material with cold coal tar the temperature of the bath was held at aobut 430 C. After an immersion period of about 30 seconds the briquettes were taken rapidly to the sand coker reactor, in which the briquettes encountered the sand at a temperature of 950 C. After 40 minutes in the reactor the shaped coke was drawn off and cooled. In a test in the Micum-Trommel abrasion apparatus, the amount of rub-off was 5.2%; shaped coke prepared without the dipping operation gave a rub-off of 14.5%.
- EXAMPLE 2 Briquettes were prepared from 1 part by weight of coking coal (30% volatiles, swelling index 8 /2) and 2 parts by weight of a low temperature coke (2% volatiles) at a briquetting temperature of 480 C.
- the hot briquettes were taken to an intermediate insulated chamber where they were allowed to stand 3 minutes during which outgasing was essentially completed. They then were taken to a bath of briquette pitch (softening point 70 C.) at 450 C. and immersed. During immersion for 1 minute the briquettes absorbed 7% by weight of pitch.
- the briquettes were transported to the entrance to the sand coker where the briquettes encountered sand at a temperature of 1000 C. The ratio of briquettes to sand was 1:6.
- the briquettes were allowed 30 minutes for passage through the reactor and then were cooled in a turbulent gas stream.
- Process for the production of abrasion resistant shaped coke comprising the steps of hot pressing in a press briquettes of a coking coal; maintaining after removal from said press the hot pressed briquettes substantially at the temperature they reach during hot pressing for a time period sufiicient to permit outgasing of said briquettes; immersing the briquettes in hot condition in a bath consisting essentially of hydrocarbons maintained at elevated temperature to coat and impregnate the briquettes with said hydrocarbons; and subjecting the thus coated and impregnated briquettes to a temperature sutficiently high to convert said briquettes to coke.
- said molten hydrocarbon bath is comprised of a member of the group consisting of pitches, bitumens and coal tar distillates.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
- Carbon And Carbon Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702019569 DE2019569C (de) | 1970-04-23 | Verfahren zur Herstellung abriebfester Formkokse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3728229A true US3728229A (en) | 1973-04-17 |
Family
ID=5768914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00059133A Expired - Lifetime US3728229A (en) | 1970-04-23 | 1970-07-29 | Process for the manufacture of abrasion-resistant shaped coke |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3728229A (OSRAM) |
| JP (1) | JPS506002B1 (OSRAM) |
| BE (1) | BE753107A (OSRAM) |
| FR (1) | FR2092187A5 (OSRAM) |
| GB (1) | GB1268734A (OSRAM) |
| NL (1) | NL7010249A (OSRAM) |
| ZA (1) | ZA705017B (OSRAM) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993024595A1 (en) * | 1992-06-04 | 1993-12-09 | The Regents Of The University Of California | Coke having its pore surfaces coated with carbon and method of coating |
-
1970
- 1970-07-03 FR FR7024725A patent/FR2092187A5/fr not_active Expired
- 1970-07-07 BE BE753107D patent/BE753107A/xx unknown
- 1970-07-08 GB GB33142/70A patent/GB1268734A/en not_active Expired
- 1970-07-10 NL NL7010249A patent/NL7010249A/xx unknown
- 1970-07-21 JP JP45063303A patent/JPS506002B1/ja active Pending
- 1970-07-21 ZA ZA705017A patent/ZA705017B/xx unknown
- 1970-07-29 US US00059133A patent/US3728229A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993024595A1 (en) * | 1992-06-04 | 1993-12-09 | The Regents Of The University Of California | Coke having its pore surfaces coated with carbon and method of coating |
| US5486216A (en) * | 1992-06-04 | 1996-01-23 | The Regents Of The University Of California | Coke having its pore surfaces coated with carbon and method of coating |
Also Published As
| Publication number | Publication date |
|---|---|
| BE753107A (fr) | 1970-12-16 |
| GB1268734A (en) | 1972-03-29 |
| ZA705017B (en) | 1971-04-28 |
| DE2019569B1 (de) | 1971-12-16 |
| JPS506002B1 (OSRAM) | 1975-03-10 |
| FR2092187A5 (OSRAM) | 1971-01-21 |
| NL7010249A (OSRAM) | 1971-10-26 |
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