CA1276465C - High solids content coal-tar mixture - Google Patents
High solids content coal-tar mixtureInfo
- Publication number
- CA1276465C CA1276465C CA000521424A CA521424A CA1276465C CA 1276465 C CA1276465 C CA 1276465C CA 000521424 A CA000521424 A CA 000521424A CA 521424 A CA521424 A CA 521424A CA 1276465 C CA1276465 C CA 1276465C
- Authority
- CA
- Canada
- Prior art keywords
- coal
- mixture
- tar
- weight
- grain
- 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 - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/04—Liquid carbonaceous fuels essentially based on blends of hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
- C10L1/322—Coal-oil suspensions
Abstract
ABSTRACT OF THE DISCLOSURE:
By optimizing grinding conditions it is possible to obtain a grain-size distribution of coal milled together with tar that is especially suitable for the production of high-solide (> 50% by weight) coal-tar mixtures that are pumpable and easy to inject into the blast furnace.
By optimizing grinding conditions it is possible to obtain a grain-size distribution of coal milled together with tar that is especially suitable for the production of high-solide (> 50% by weight) coal-tar mixtures that are pumpable and easy to inject into the blast furnace.
Description
~27~
The presen-t inventioll is concerned with a high-sollds coal-tar mixture. More precisely it concerns the grain-size distribution of the coal that permits attainment of more than 50~ solids (by weight) in the mixture without the use of additives.
The word coal in this description refers to any essentially solid carbonaceous fuel, such as coal, metallurgical coke, petroleum coke, semicoke, etc..
The use of auxiliary fuels injected at the tuyeres ensures great benefits as regards blast furnace productivity and energy consumption. However, fuel-oil, generally employed as auxiliary fuel, is a material whose cost and supply are dependent on nontechnical factors that may make its use unacceptable in plants such as the blast furnace operating in very delicate _ ,....
~7g~iS
U~ D~ Other type~ of auxiliary fuel have thus been sought. Coal-water mi~tures and coal~tar mixtures have been found interesting for a variegy of reasons~ essen-tiall~ conoerning cost, quality a~d svsilability.
Where coal-tar mixtures ~re concerned, one limitatio~ to date has been the fact th~t when the coal content of the mi~ture e~ceeds 40~ by weight, the apparènt viscosity of the mi~ture increases very rapidly, ~ith the result that at about 50~ solids (by weight) the mixture is no longer pumpable. Furthermore, above 40~0 solids (by weight) the spparent viscosity of the coal-tar mixture also increases markedly with time. This is thought to be due to sb-sorption of tar in the coal pores, thus considerably in-crea~ing the ~ercentage coal(by volume)in the mixture.
Because of these difficulties, reported recently in papers S44 and sl o8 st the 103rd and 105th Meetings of the ISIJ (April 1982 and April 1983), resRectively, the coal content of the co~l-tar mixtures used in indu~trisl trials in Jspan on B
5050 m~ blast furnace could not exceed 43% by weight(Proceedings, Fifth International Sympoqium on "Coal Slurry Combu~tion and Technology" 25-27/4/83, Tampa9 USA, Vol. 1, pages 361 et seq.).
Contrary to what has been reported on the ~tate of the art3 however, it has been found 9Urpri3illgly that a given coal grain- ize di~qtribution permlts production of coal-tar ~i~tures contai~ing more than 50~0 coal and having a vi C09ity ~uch a~ to render the mixture easily pumpable and injectable, and without any marked variations with time.
According to this i~vention, minuH 20-mm coal, ~elected from coking coals, difficult-to-coke coals, metallurgical coke and petroleum cok~ i9 fed to a mill tog~ther Yith the tar and ground to obtain the following gTain-size di~tribution:
- plue 500 ~m 0 (% weight) - minus 500 plu~ 250 ~m ~-2 n - minu~ 250 plu~ 8~ p~ 3-7 "
- minu~ 88 plu~ 44 ~m 9-18 n - minus 44 plus 11 ~ m 40-50 - minu~ m 30-45 n In thi~ way, depending on the type of coal used, the actual grain-size distribution obtained and the quantity of coal in the mixture, the apparent viscosity (Ha~ke MV II P, at 70C, 1800~, 28 9 ) i8 between 800 and 1200 cP approxi-mately, with good stability up to fourteen days without 6tirring and up to about thirty day~ with gentle ~tirrir~.
The grain-~ize distribution according to the invention ha~
enabled blast-furnace-proved coal-tar mixtures contaiDl~g up to 53.1~ coal (by weight) to be obtained; moreover, labora-tory fluidity~ stability, injectability and combu~tion tests indicate the po~sibility of utilizing coal-tar mixture-~ con-taining at lea~t 55% coal (by weight).
4.
Attainme~t of the desired grain-size distribution mu9t be studied" of course, on the basis of mill type, grind-ing parameter~ ~d the kind of coal employed. In any c~se~ however, the grain-~ize distribution indicated above must be attained.
For the purpoae of exemplification, without limiti~g the i~vention or claims thereto, indicatio~s are give~ belo~
o~ ~onditions for tro klndg of coal that hsve resulted in diverse type3 of mi~tures.
Exam~le 1 A medium-high volatiles, bituminous coking coal having the following characteristics:
Grain-~ize analysi 9 (~ weight) + 15 mm O
-15 ~ 8 mm 7.08 -8 + 2.83 mm 21.24 -2.83 ~ 1 mm 24.57 -1 ~ 0.25 mm 28.50 ~0.25 mm 18.61 Proximate analysi s (% weight) Moi~ture 3.0 hsh (db) 8.3 Volatile matter (db) 28.2 Fixed C ( db) 63 . 5 Ultimate _ analy~i g (~c wt dry basis- db) A~h 8a3 C 83.5 H 4.4 S 0.9 N 1.2 0 1.7 7~ ~5 5.
Hardgrove Grinding Index (HGI) 95 and a tar having the following characteristics.
Chemi ~
( ~ W+~ Q ) C (db) 94.5 H (db) 4.5 S (db) 0.5 ~ylene in~olubles: 6~o; A~h in i~solubles 0.15~; LHV 36.98 ~ g;
Specific gravity: 1.17 k ~ dm3; Apparent vi~cosity (70C, 1800 8, 28 8 ): 64 cP, were fed together to a four-compartment 0.42 m3 ball mill with a ball-load of 711 kg the size-grading of which wa~
Dia (mm): 16 18 20 25 30 weight: 12 13 25 30 20.
The mill was operated ~t 38 revolutions per minute (75~0 of critical speed) with a production rate of 100 kg~h.
Two mixtures were m~de, A andB, with oolid~ concentrQtions of about 43~0 and ~bout 53~0 re~pectively.
~he characteri~tics of these mixture~ were as follows:
M~xture A Mlxture 3 Percent coal (by weight) 42.8 51.6 Grain-~ize di~tribution ~ 500 ~m 0~4 0 -500 + 250 ~m 0.2 1.$
-250 + 88 ~m 5.6 3.2 - 88 + 44 ~m 8.9 9.3 44 ~ m 34.5 43.9 _ 11 ym 50,4 41.8 ~L.~ 7~4~5 Apparent viscosity c~
(70C, 1800 ~, 28 B ) 645 928 Pumpability ~Pa/100 m (1" pipe, V=0.05 m/~) - 0.14 Examule 2 Coke fines having the following characteri3tics;
Grain-size analyBi 8 (% weight) +15 mm o.46 ~15 ~ 8 mm 0.10 - 8 + 2.83 mm 19.95 -2.83 + 1 mm 35.20 -1 ~ 0.25 mm 26.60 _0.25 mm17.69 Proximate analy~is (~wt db) Carbon 84 Volatile matter 2.40 Ash 13.60 was charged together with the Example 1 tar to the same mill and was ground as per Example 1, but at ~ production rate of 50 kg/h. The mi~tures obtained - C and D - with target solid~ concentration~ of 44 and 53~, had the follow-ing characteristics:
ixture C M~xture D
Percent co~ (by weight) 44.3 53.1 Grain-size distribution + 500 ~m 11.2 0 -500 ~ 250 ~m 1.3 0-9 -250 + 88 ~m 6.5 5.9 - 88 + 44 ~m 13.8 17.9 - 44 ~ m 30.7 43.1 m 36.5 32.2 S
App~rent visco~ity c~
(~O~C9 1800 9~ 28 ~ ) 1090 950 Static stability, under~tood a~ being the ability of the mixture to maintain the carbonaceous ~oli~ part in ~uspen-sion and to prevent it from settling out 3 wa~ measured on Mixtures B and D. The te~t i~ mad~ with a 3 mm steel diamete~Y~ylinder weighing 30 g, the mes~urement reported being that len4th o~ a cylind~r which c~nnot penetrate depth of 180 mm of mixture in the undisturbed state.
Put another way, if the solid part of the mixture doe~ not separ~te out, the teqt cylinder penetrate~ completely into the mixture. If, on the other hand, solids separate out and are deposited on the bottom of the test container, the layer which forms prevents the cylinder from penetrating completely.
The number of millimetres of cylinder protruding above the free surface of the mixture provides the measure of the stab-ility of the mixture.
The values found for ~ixtures B and D are as follows:
Static stability test: mm not penetrated after ~ weeks ,`~ xture Ow 1w 2w 3 _ _ As i~ evident from these examples, grinding condition~
influence grain-3ize distribution of the ground solid; only s if the grain-size distribution falls within the ranges specified as per the invention are mixtures obtained with characteris-tics suitable for blast-furnace use, especially as regards pumpability and viscosity, which must be such as to permit pipeline transport of the mixture within a radius of several kilometres, followed by its injection at the blast-furnace tuyeres.
A type B mixture has been produced in a 3.5 t/h pilot plant in a one-week campaign and the resulting mixture injected without trouble at two tuyeres of a medium sized blast furnace a short distance away, producing 5500 tHM/24 h.
Mix-ture flow rate was between 500 and 100 kg/h per tuyere;
blast characteristics were: T=1200 C, Moisture 15 g/m N;
2 21%.
The presen-t inventioll is concerned with a high-sollds coal-tar mixture. More precisely it concerns the grain-size distribution of the coal that permits attainment of more than 50~ solids (by weight) in the mixture without the use of additives.
The word coal in this description refers to any essentially solid carbonaceous fuel, such as coal, metallurgical coke, petroleum coke, semicoke, etc..
The use of auxiliary fuels injected at the tuyeres ensures great benefits as regards blast furnace productivity and energy consumption. However, fuel-oil, generally employed as auxiliary fuel, is a material whose cost and supply are dependent on nontechnical factors that may make its use unacceptable in plants such as the blast furnace operating in very delicate _ ,....
~7g~iS
U~ D~ Other type~ of auxiliary fuel have thus been sought. Coal-water mi~tures and coal~tar mixtures have been found interesting for a variegy of reasons~ essen-tiall~ conoerning cost, quality a~d svsilability.
Where coal-tar mixtures ~re concerned, one limitatio~ to date has been the fact th~t when the coal content of the mi~ture e~ceeds 40~ by weight, the apparènt viscosity of the mi~ture increases very rapidly, ~ith the result that at about 50~ solids (by weight) the mixture is no longer pumpable. Furthermore, above 40~0 solids (by weight) the spparent viscosity of the coal-tar mixture also increases markedly with time. This is thought to be due to sb-sorption of tar in the coal pores, thus considerably in-crea~ing the ~ercentage coal(by volume)in the mixture.
Because of these difficulties, reported recently in papers S44 and sl o8 st the 103rd and 105th Meetings of the ISIJ (April 1982 and April 1983), resRectively, the coal content of the co~l-tar mixtures used in indu~trisl trials in Jspan on B
5050 m~ blast furnace could not exceed 43% by weight(Proceedings, Fifth International Sympoqium on "Coal Slurry Combu~tion and Technology" 25-27/4/83, Tampa9 USA, Vol. 1, pages 361 et seq.).
Contrary to what has been reported on the ~tate of the art3 however, it has been found 9Urpri3illgly that a given coal grain- ize di~qtribution permlts production of coal-tar ~i~tures contai~ing more than 50~0 coal and having a vi C09ity ~uch a~ to render the mixture easily pumpable and injectable, and without any marked variations with time.
According to this i~vention, minuH 20-mm coal, ~elected from coking coals, difficult-to-coke coals, metallurgical coke and petroleum cok~ i9 fed to a mill tog~ther Yith the tar and ground to obtain the following gTain-size di~tribution:
- plue 500 ~m 0 (% weight) - minus 500 plu~ 250 ~m ~-2 n - minu~ 250 plu~ 8~ p~ 3-7 "
- minu~ 88 plu~ 44 ~m 9-18 n - minus 44 plus 11 ~ m 40-50 - minu~ m 30-45 n In thi~ way, depending on the type of coal used, the actual grain-size distribution obtained and the quantity of coal in the mixture, the apparent viscosity (Ha~ke MV II P, at 70C, 1800~, 28 9 ) i8 between 800 and 1200 cP approxi-mately, with good stability up to fourteen days without 6tirring and up to about thirty day~ with gentle ~tirrir~.
The grain-~ize distribution according to the invention ha~
enabled blast-furnace-proved coal-tar mixtures contaiDl~g up to 53.1~ coal (by weight) to be obtained; moreover, labora-tory fluidity~ stability, injectability and combu~tion tests indicate the po~sibility of utilizing coal-tar mixture-~ con-taining at lea~t 55% coal (by weight).
4.
Attainme~t of the desired grain-size distribution mu9t be studied" of course, on the basis of mill type, grind-ing parameter~ ~d the kind of coal employed. In any c~se~ however, the grain-~ize distribution indicated above must be attained.
For the purpoae of exemplification, without limiti~g the i~vention or claims thereto, indicatio~s are give~ belo~
o~ ~onditions for tro klndg of coal that hsve resulted in diverse type3 of mi~tures.
Exam~le 1 A medium-high volatiles, bituminous coking coal having the following characteristics:
Grain-~ize analysi 9 (~ weight) + 15 mm O
-15 ~ 8 mm 7.08 -8 + 2.83 mm 21.24 -2.83 ~ 1 mm 24.57 -1 ~ 0.25 mm 28.50 ~0.25 mm 18.61 Proximate analysi s (% weight) Moi~ture 3.0 hsh (db) 8.3 Volatile matter (db) 28.2 Fixed C ( db) 63 . 5 Ultimate _ analy~i g (~c wt dry basis- db) A~h 8a3 C 83.5 H 4.4 S 0.9 N 1.2 0 1.7 7~ ~5 5.
Hardgrove Grinding Index (HGI) 95 and a tar having the following characteristics.
Chemi ~
( ~ W+~ Q ) C (db) 94.5 H (db) 4.5 S (db) 0.5 ~ylene in~olubles: 6~o; A~h in i~solubles 0.15~; LHV 36.98 ~ g;
Specific gravity: 1.17 k ~ dm3; Apparent vi~cosity (70C, 1800 8, 28 8 ): 64 cP, were fed together to a four-compartment 0.42 m3 ball mill with a ball-load of 711 kg the size-grading of which wa~
Dia (mm): 16 18 20 25 30 weight: 12 13 25 30 20.
The mill was operated ~t 38 revolutions per minute (75~0 of critical speed) with a production rate of 100 kg~h.
Two mixtures were m~de, A andB, with oolid~ concentrQtions of about 43~0 and ~bout 53~0 re~pectively.
~he characteri~tics of these mixture~ were as follows:
M~xture A Mlxture 3 Percent coal (by weight) 42.8 51.6 Grain-~ize di~tribution ~ 500 ~m 0~4 0 -500 + 250 ~m 0.2 1.$
-250 + 88 ~m 5.6 3.2 - 88 + 44 ~m 8.9 9.3 44 ~ m 34.5 43.9 _ 11 ym 50,4 41.8 ~L.~ 7~4~5 Apparent viscosity c~
(70C, 1800 ~, 28 B ) 645 928 Pumpability ~Pa/100 m (1" pipe, V=0.05 m/~) - 0.14 Examule 2 Coke fines having the following characteri3tics;
Grain-size analyBi 8 (% weight) +15 mm o.46 ~15 ~ 8 mm 0.10 - 8 + 2.83 mm 19.95 -2.83 + 1 mm 35.20 -1 ~ 0.25 mm 26.60 _0.25 mm17.69 Proximate analy~is (~wt db) Carbon 84 Volatile matter 2.40 Ash 13.60 was charged together with the Example 1 tar to the same mill and was ground as per Example 1, but at ~ production rate of 50 kg/h. The mi~tures obtained - C and D - with target solid~ concentration~ of 44 and 53~, had the follow-ing characteristics:
ixture C M~xture D
Percent co~ (by weight) 44.3 53.1 Grain-size distribution + 500 ~m 11.2 0 -500 ~ 250 ~m 1.3 0-9 -250 + 88 ~m 6.5 5.9 - 88 + 44 ~m 13.8 17.9 - 44 ~ m 30.7 43.1 m 36.5 32.2 S
App~rent visco~ity c~
(~O~C9 1800 9~ 28 ~ ) 1090 950 Static stability, under~tood a~ being the ability of the mixture to maintain the carbonaceous ~oli~ part in ~uspen-sion and to prevent it from settling out 3 wa~ measured on Mixtures B and D. The te~t i~ mad~ with a 3 mm steel diamete~Y~ylinder weighing 30 g, the mes~urement reported being that len4th o~ a cylind~r which c~nnot penetrate depth of 180 mm of mixture in the undisturbed state.
Put another way, if the solid part of the mixture doe~ not separ~te out, the teqt cylinder penetrate~ completely into the mixture. If, on the other hand, solids separate out and are deposited on the bottom of the test container, the layer which forms prevents the cylinder from penetrating completely.
The number of millimetres of cylinder protruding above the free surface of the mixture provides the measure of the stab-ility of the mixture.
The values found for ~ixtures B and D are as follows:
Static stability test: mm not penetrated after ~ weeks ,`~ xture Ow 1w 2w 3 _ _ As i~ evident from these examples, grinding condition~
influence grain-3ize distribution of the ground solid; only s if the grain-size distribution falls within the ranges specified as per the invention are mixtures obtained with characteris-tics suitable for blast-furnace use, especially as regards pumpability and viscosity, which must be such as to permit pipeline transport of the mixture within a radius of several kilometres, followed by its injection at the blast-furnace tuyeres.
A type B mixture has been produced in a 3.5 t/h pilot plant in a one-week campaign and the resulting mixture injected without trouble at two tuyeres of a medium sized blast furnace a short distance away, producing 5500 tHM/24 h.
Mix-ture flow rate was between 500 and 100 kg/h per tuyere;
blast characteristics were: T=1200 C, Moisture 15 g/m N;
2 21%.
Claims (2)
1. A high-coal content coal-tar mixture especially suitable for injection as auxiliary fuel at the tuyeres of blast furnaces, characterized in that said mixture has a grain-size distri ution within the following range:
over 500 µm 0 % weight between 500 and 250 µm 1-2 "
between 250 and 88 µm 3-7 "
between 88 and 44 µm 9-18 "
between 44 and 11 µm 40-50 "
under 11 µm 30-45 "
over 500 µm 0 % weight between 500 and 250 µm 1-2 "
between 250 and 88 µm 3-7 "
between 88 and 44 µm 9-18 "
between 44 and 11 µm 40-50 "
under 11 µm 30-45 "
2. A coal-tar mixture as claimed in claim 1, characterized in that it contains more than 50% by weight of coal and it has an apparent viscosity at 70°C between 800 and 1200 cP.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT48710/85A IT1184665B (en) | 1985-10-24 | 1985-10-24 | CHARCOAL-TAR MIX WITH HIGH SOLID CONTENT |
| IT48710A85 | 1985-10-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1276465C true CA1276465C (en) | 1990-11-20 |
Family
ID=11268180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000521424A Expired - Fee Related CA1276465C (en) | 1985-10-24 | 1986-10-24 | High solids content coal-tar mixture |
Country Status (18)
| Country | Link |
|---|---|
| US (1) | US4756721A (en) |
| JP (1) | JPS62101691A (en) |
| KR (1) | KR900004548B1 (en) |
| AT (1) | AT393276B (en) |
| AU (1) | AU593297B2 (en) |
| BE (1) | BE905641A (en) |
| BR (1) | BR8605323A (en) |
| CA (1) | CA1276465C (en) |
| CH (1) | CH670833A5 (en) |
| DE (1) | DE3636118A1 (en) |
| FR (1) | FR2589161B1 (en) |
| GB (1) | GB2182052B (en) |
| IN (1) | IN166324B (en) |
| IT (1) | IT1184665B (en) |
| LU (1) | LU86634A1 (en) |
| NL (1) | NL8602663A (en) |
| SE (1) | SE464762B (en) |
| ZA (1) | ZA867925B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4959139A (en) * | 1989-01-09 | 1990-09-25 | Conoco Inc. | Binder pitch and method of preparation |
| DE602007011124D1 (en) | 2006-02-07 | 2011-01-27 | Colt Engineering Corp | Carbon dioxide enriched flue gas injection for hydrocarbon recovery |
| JP6198640B2 (en) * | 2014-03-04 | 2017-09-20 | 株式会社神戸製鋼所 | Petroleum coke blowing blast furnace operation method |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1375811A (en) * | 1919-08-05 | 1921-04-26 | Bates Lindon Wallace | Fuel and method of producing same |
| US3231367A (en) * | 1961-11-24 | 1966-01-25 | Nat Steel Corp | Iron producing blast furnace operations |
| US4153421A (en) * | 1976-05-17 | 1979-05-08 | Interlake, Inc. | Stabilized fuel slurry |
| US4146459A (en) * | 1976-09-08 | 1979-03-27 | Continental Oil Company | Treatment of coal liquefaction effluent |
| US4149854A (en) * | 1978-06-08 | 1979-04-17 | Suntech, Inc. | Stabilized coal-oil slurry and process |
| US4282006A (en) * | 1978-11-02 | 1981-08-04 | Alfred University Research Foundation Inc. | Coal-water slurry and method for its preparation |
| US4358292A (en) * | 1979-08-17 | 1982-11-09 | Battista Orlando A | Stabilized hybrid fuel slurries |
| AU553460B2 (en) * | 1980-12-05 | 1986-07-17 | Broken Hill Proprietary Company Limited, The | Hydrolitic agglomeration of coal and its application to the preparation of coal slurry fuel mixture |
| JPS59115391A (en) * | 1982-12-21 | 1984-07-03 | Nippon Oil & Fats Co Ltd | Mixed fuel composition |
| US4592759A (en) * | 1983-02-25 | 1986-06-03 | Dai-Ichi Kogyo Seiyaku Co., Ltd. | Production of aqueous coal slurries having high coal contents |
| DE3435945A1 (en) * | 1984-09-29 | 1986-04-03 | Basf Ag, 6700 Ludwigshafen | AQUEOUS COAL DISPERSIONS |
| US4579563A (en) * | 1985-04-15 | 1986-04-01 | Burnside Kenneth D | Method and apparatus for fluidizing coal tar sludge |
-
1985
- 1985-10-24 IT IT48710/85A patent/IT1184665B/en active
-
1986
- 1986-10-10 GB GB8624391A patent/GB2182052B/en not_active Expired
- 1986-10-15 IN IN750/CAL/86A patent/IN166324B/en unknown
- 1986-10-16 CH CH4139/86A patent/CH670833A5/it not_active IP Right Cessation
- 1986-10-20 ZA ZA867925A patent/ZA867925B/en unknown
- 1986-10-22 FR FR868614641A patent/FR2589161B1/en not_active Expired - Fee Related
- 1986-10-22 JP JP61249779A patent/JPS62101691A/en active Pending
- 1986-10-22 BE BE0/217323A patent/BE905641A/en not_active IP Right Cessation
- 1986-10-23 NL NL8602663A patent/NL8602663A/en not_active Application Discontinuation
- 1986-10-23 AT AT2824/86A patent/AT393276B/en active
- 1986-10-23 DE DE19863636118 patent/DE3636118A1/en active Granted
- 1986-10-23 SE SE8604540A patent/SE464762B/en not_active IP Right Cessation
- 1986-10-24 CA CA000521424A patent/CA1276465C/en not_active Expired - Fee Related
- 1986-10-24 KR KR1019860008996A patent/KR900004548B1/en not_active IP Right Cessation
- 1986-10-24 US US06/927,225 patent/US4756721A/en not_active Expired - Fee Related
- 1986-10-24 LU LU86634A patent/LU86634A1/en unknown
- 1986-10-24 BR BR8605323A patent/BR8605323A/en unknown
- 1986-10-24 AU AU64370/86A patent/AU593297B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| LU86634A1 (en) | 1987-04-02 |
| KR900004548B1 (en) | 1990-06-29 |
| KR870004122A (en) | 1987-05-07 |
| ATA282486A (en) | 1991-02-15 |
| IN166324B (en) | 1990-04-14 |
| FR2589161A1 (en) | 1987-04-30 |
| GB2182052A (en) | 1987-05-07 |
| SE464762B (en) | 1991-06-10 |
| AT393276B (en) | 1991-09-25 |
| GB8624391D0 (en) | 1986-11-12 |
| IT8548710A0 (en) | 1985-10-24 |
| FR2589161B1 (en) | 1990-08-10 |
| SE8604540L (en) | 1987-04-25 |
| DE3636118C2 (en) | 1988-12-08 |
| BE905641A (en) | 1987-02-16 |
| SE8604540D0 (en) | 1986-10-23 |
| IT1184665B (en) | 1987-10-28 |
| GB2182052B (en) | 1989-09-20 |
| ZA867925B (en) | 1988-08-31 |
| JPS62101691A (en) | 1987-05-12 |
| NL8602663A (en) | 1987-05-18 |
| CH670833A5 (en) | 1989-07-14 |
| DE3636118A1 (en) | 1987-04-30 |
| BR8605323A (en) | 1987-08-04 |
| AU593297B2 (en) | 1990-02-08 |
| US4756721A (en) | 1988-07-12 |
| AU6437086A (en) | 1987-04-30 |
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