CA1111155A - Ore beneficiation - Google Patents
Ore beneficiationInfo
- Publication number
- CA1111155A CA1111155A CA319,380A CA319380A CA1111155A CA 1111155 A CA1111155 A CA 1111155A CA 319380 A CA319380 A CA 319380A CA 1111155 A CA1111155 A CA 1111155A
- Authority
- CA
- Canada
- Prior art keywords
- bis
- ester
- alkyl
- acid salt
- sulfosuccinic acid
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/012—Organic compounds containing sulfur
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/006—Hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/04—Frothers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
- B03D2203/04—Non-sulfide ores
- B03D2203/08—Coal ores, fly ash or soot
Landscapes
- Solid Fuels And Fuel-Associated Substances (AREA)
- Liquid Carbonaceous Fuels (AREA)
Abstract
TITLE: IMPROVED PROCESS FOR RECOVERY
OF FINE COAL
ABSTRACT OF THE DISCLOSURE
Fine coal is recovered with reduced ash content when a bis(alkyl)ester of a sulfonsuccinic acid salt is em-ployed as conditioning agent in froth flotation thereof.
OF FINE COAL
ABSTRACT OF THE DISCLOSURE
Fine coal is recovered with reduced ash content when a bis(alkyl)ester of a sulfonsuccinic acid salt is em-ployed as conditioning agent in froth flotation thereof.
Description
27~ 9 This invention relates to an improved process for the froth flotation of fine coal. More particularly, this invention relates to such a process wherein a bis(alkyl)ester of a sulfosuccinic acid salt is used as conditioning agent with or without frothing agent to provide high recovery with reduced ash content.
Fine coal resulting from mining operations and having a particle size of about minus 28 mesh is convention-ally froth floated for recovery and sulfur removal. In the conventional process, the fine coal is froth floated using a frothing agent alone or a combination of frothing agent and an oil. Although at optimum dosage of frothing agent high recovery of coal is obtained, the amount of ash resulting upon combustion of the recovered coal is higher than desired.
This ash content reduces the BTU value of the coal and can contribute to air pollution. Accordingly, there exists the need for an improved process for the froth flotation of fine coal which reduces ash content without sacrifice in coal re-covery. The provision for such an improved process would fulfill a long-felt need and constitute a significant advance in the art.
In accordance with the present invention, there is provided a process for recovering fine coal which comprises conditioning an aqueous slurry of fine coal with an effective amount of a bis(alkyl)ester of sulfosuccinic acid salt of the general structure ~ ~: 1l : : :
., .
s~
wherein R is a linear or branched chain alkyl gr~ o~ ab~t 3 to 20 carbon atoms and M is a cation provi`ding a water--soluble salt, and thereafter froth-floating the conditioned slurry to obtain a coal concentrate as the float.
The process of the present in~ention provides high recovery of coal values and, unexpectedly, reduces the ash content of the recovered coal. The bis(alkyl)ester of sulfo-succinic acid salt may be used alone or in combination with a frother or a frother and an oil.
In accordance with the present invention, there is also provided a conditioning agent for use in the froth flo-tation of fine coal which comprises from about 1 to about 99 weight percent of a frother and, correspondingly, from about 9g to about 1 weight percent of a bis(alkyl)ester of a sulfosuccinic acid salt of the general structure H2 -~-OR
MSO3HC-~-OR
wherein R is a linear or branched chain alkyl group of about 3 to 20 carbon atoms and M is a cation providing a water--soluble salt.
The conditioning agent of the present invention pro-~ Yides high coal recoYery and unexpectedly reduces the ash ; content associated with the recovered fine coal. The : aomposition can also eliminate requirements for oil as an . extruder for the frothing agent and can offset adverse effects on recovery resulting from excessive usage of oil.
:
.
.
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As indicated, the conditioning agent of the present invention consists of two essential ingredients, a frother and a bis(alkyl)ester of a sulfosuccinic acid. The frother employed may be any of the conventional frothing agents normally used in the froth flotation of fine coal. Such agents include, for example, alcohols cont~ining a~out 4 to 12 carbon atoms or mixtures thereof, cresylic acids and poloxy-alkyleneglycol types, a preferred species being a mixture of C4-C8 alcohols.
The bis(alkyl)esters of a sulfonic acid salt will have the general structure H2f-C-OR
MS03HC-~-OR
wherein R is a linear or branched chain alkyl group of about 3 to 20 carbon atoms, preferably about 4 to 13 carbon atoms, and M is a cation providing a water-soluble salt, preferably a sodium, potassium, or ammonium cation.
The proportions of essential ingredients in the conditioning agent will generally comprise from about 1 to 99 weight percent of frother, preferably about 50 to 75 weight percent thereof, and, correspondingly, from about 99 "~ .
to 1 weight percent of bis(alkyl)ester of a sulfonsuccinic acid salt preferably about 50 to 25 weight percent thereof, the weight percentages being based on the total weight of frother and bis(alkyl)ester of a sulfosuccinic acid salt.
Water and other diluents may be present in the conditioning agent, if desired.
In carrying out froth flotation of fine coal, an aqueous slurry of the fine particles is conventionally conditioned with effective amounts of frother and optionally an oil and then sub~ected to froth flotation by standard procedures. In carrying out processing using the conditioning agent of the present in~ention, a suitable aqueous slurry of fine coal is conditioned with an effective amount of the con-ditioning agent described and then subjected to froth flotation by standard procedures. The effective amount will vary depending upon the source of the fine coal and other factors.
Generally, the effective amount will be in the range of about 0.01 to 2.0 pounds per ton of fine coal, preferably about 0.05 to 0.5 pound per ton of fine coal. The usage of con-ditioning agent will normally be in the same range as con-ventional usages of frother alone. Oil is generally not required when the conditioning agent of the present invention is employed, but oil may be used as an added extruder if desired. Oil, if used, will follow conventional usage.
Suitable oi:Ls are those derived from p~troleum or animal and ~ vegetable products, preferably a fuel oil.
The fine ~oalarises from mining operations as an aqueous slurry of varying coal contents, usually from about
Fine coal resulting from mining operations and having a particle size of about minus 28 mesh is convention-ally froth floated for recovery and sulfur removal. In the conventional process, the fine coal is froth floated using a frothing agent alone or a combination of frothing agent and an oil. Although at optimum dosage of frothing agent high recovery of coal is obtained, the amount of ash resulting upon combustion of the recovered coal is higher than desired.
This ash content reduces the BTU value of the coal and can contribute to air pollution. Accordingly, there exists the need for an improved process for the froth flotation of fine coal which reduces ash content without sacrifice in coal re-covery. The provision for such an improved process would fulfill a long-felt need and constitute a significant advance in the art.
In accordance with the present invention, there is provided a process for recovering fine coal which comprises conditioning an aqueous slurry of fine coal with an effective amount of a bis(alkyl)ester of sulfosuccinic acid salt of the general structure ~ ~: 1l : : :
., .
s~
wherein R is a linear or branched chain alkyl gr~ o~ ab~t 3 to 20 carbon atoms and M is a cation provi`ding a water--soluble salt, and thereafter froth-floating the conditioned slurry to obtain a coal concentrate as the float.
The process of the present in~ention provides high recovery of coal values and, unexpectedly, reduces the ash content of the recovered coal. The bis(alkyl)ester of sulfo-succinic acid salt may be used alone or in combination with a frother or a frother and an oil.
In accordance with the present invention, there is also provided a conditioning agent for use in the froth flo-tation of fine coal which comprises from about 1 to about 99 weight percent of a frother and, correspondingly, from about 9g to about 1 weight percent of a bis(alkyl)ester of a sulfosuccinic acid salt of the general structure H2 -~-OR
MSO3HC-~-OR
wherein R is a linear or branched chain alkyl group of about 3 to 20 carbon atoms and M is a cation providing a water--soluble salt.
The conditioning agent of the present invention pro-~ Yides high coal recoYery and unexpectedly reduces the ash ; content associated with the recovered fine coal. The : aomposition can also eliminate requirements for oil as an . extruder for the frothing agent and can offset adverse effects on recovery resulting from excessive usage of oil.
:
.
.
~ -2-:
S
As indicated, the conditioning agent of the present invention consists of two essential ingredients, a frother and a bis(alkyl)ester of a sulfosuccinic acid. The frother employed may be any of the conventional frothing agents normally used in the froth flotation of fine coal. Such agents include, for example, alcohols cont~ining a~out 4 to 12 carbon atoms or mixtures thereof, cresylic acids and poloxy-alkyleneglycol types, a preferred species being a mixture of C4-C8 alcohols.
The bis(alkyl)esters of a sulfonic acid salt will have the general structure H2f-C-OR
MS03HC-~-OR
wherein R is a linear or branched chain alkyl group of about 3 to 20 carbon atoms, preferably about 4 to 13 carbon atoms, and M is a cation providing a water-soluble salt, preferably a sodium, potassium, or ammonium cation.
The proportions of essential ingredients in the conditioning agent will generally comprise from about 1 to 99 weight percent of frother, preferably about 50 to 75 weight percent thereof, and, correspondingly, from about 99 "~ .
to 1 weight percent of bis(alkyl)ester of a sulfonsuccinic acid salt preferably about 50 to 25 weight percent thereof, the weight percentages being based on the total weight of frother and bis(alkyl)ester of a sulfosuccinic acid salt.
Water and other diluents may be present in the conditioning agent, if desired.
In carrying out froth flotation of fine coal, an aqueous slurry of the fine particles is conventionally conditioned with effective amounts of frother and optionally an oil and then sub~ected to froth flotation by standard procedures. In carrying out processing using the conditioning agent of the present in~ention, a suitable aqueous slurry of fine coal is conditioned with an effective amount of the con-ditioning agent described and then subjected to froth flotation by standard procedures. The effective amount will vary depending upon the source of the fine coal and other factors.
Generally, the effective amount will be in the range of about 0.01 to 2.0 pounds per ton of fine coal, preferably about 0.05 to 0.5 pound per ton of fine coal. The usage of con-ditioning agent will normally be in the same range as con-ventional usages of frother alone. Oil is generally not required when the conditioning agent of the present invention is employed, but oil may be used as an added extruder if desired. Oil, if used, will follow conventional usage.
Suitable oi:Ls are those derived from p~troleum or animal and ~ vegetable products, preferably a fuel oil.
The fine ~oalarises from mining operations as an aqueous slurry of varying coal contents, usually from about
2 to 15 weight percent. Such slurry is conditioned for a brief time period with the conditioning agent or a combination thereof with oil. Such conditioning may be from a few seconds to a few minutes to ensure uniform distribution throughout the slurry.
After the slurry is properly conditioned, it is subjected to conventional froth flotation procedure. In such procedure, air bubles are introduced into the slurry lP155 to form a froth on the surface of the slurry. The air bubles attach to coal particles and cause them to levitate and become part of the froth, which is continually skimmed from the slurry, thus isolating the desired coal particles from other ingredients in the slurry. The recovered coal is washed, filtered, and dried to provide combustible material of greatly reduced ash content. Typically, the untreated coal particles contain 42~ ash and this content is considerably reduced by froth flotation using the conditioning agent of the present inYention.
The invention is more fully illustrated by the examples which follow wherein all parts and percentages are by weight unless otherwise specified.
Exam~les l-l_ A series of froth flotations were run on a sample of fine coal obtained from a leading processor. The coal particles were minus 28 mesh. Using an 8.0% aqueous sus-pension of the crude coal o~ about lO~ a8h, a comparative run (A) was made using a mixture of C4 to C8 alcohols as frothing agent. A number of bis(alkyl)esters of sulfosuccinic acid, soaium salt were run at the same dosage as frother above. An additional number of runs were made using a combination of the conventional frother and a bis(alkyl)ester of sulfo-succinic acid, sodium salt.
The various results obtained and details of th~ runs are given in Table I which follows.
The results show the reduced ash content obtained by the conditioning agent of the present invention. Such re-duction leads to higher BTU values for the coal.
.. . .
lS5 ~, H ~ c~ H ~1 ~ ~ .~ O
E~ ,1 ~ ~ ~ u~ 1~ Lf) ~ o~ 1~ 0 ~ O ~ ~
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¢ Zi O
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~tl~ H ~ O O O ~!1 E~ t.q u~
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O ~i I I I I P- ~
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. . ,,~
U~
~i Z
" , Exa~le 1~
A further series of froth flotations were run to demonstrate that the conditioning agents used in the process of the present invention can replace the oil used in conventional frother-oil combinations. The fine coal pro-cessed was obtained from a different source than that used in the previous examples. The slurxy contained 4.6% crude coal of about 42.0% ash. In a comparative run (B~, the coal slurry was froth-floated using only a C4-C8 alcohol mixture as frother. In another comparatiYe run (C), a mixture of the C4-C8 alcohol frother and No. 2 fuel oil was used to froth-float the coal. In an embodiment of the present in-Yention, bis(tridecyl)sulfosuccinic acid, sodium salt was used to replace the oil in comparative run (CI. Results and details of these runs are given in Table II, ~hich follows.
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ss The results show that a small usage of a bis(alkyl)-ester of a sulfosuccinic acid salt effectively r~places a larger quantity of fuel oil.
Example 20 The same fine coal slurry source used in Example l9 was employed. In a comparative run (D), the amount of oil used in comparative run (C) was increased. In an embodiment of the invention, a small quantity of the bis(alkyl)-ester used in Example l9 was added to combination of frother10 and fuel oil. Details and results are given in Table III, which follows.
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These results show that the bis(alkyl)ester of sulfosuccinic acid salt can overcome the adverse effects on recoYery of excess oil.
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., , ~, - .
After the slurry is properly conditioned, it is subjected to conventional froth flotation procedure. In such procedure, air bubles are introduced into the slurry lP155 to form a froth on the surface of the slurry. The air bubles attach to coal particles and cause them to levitate and become part of the froth, which is continually skimmed from the slurry, thus isolating the desired coal particles from other ingredients in the slurry. The recovered coal is washed, filtered, and dried to provide combustible material of greatly reduced ash content. Typically, the untreated coal particles contain 42~ ash and this content is considerably reduced by froth flotation using the conditioning agent of the present inYention.
The invention is more fully illustrated by the examples which follow wherein all parts and percentages are by weight unless otherwise specified.
Exam~les l-l_ A series of froth flotations were run on a sample of fine coal obtained from a leading processor. The coal particles were minus 28 mesh. Using an 8.0% aqueous sus-pension of the crude coal o~ about lO~ a8h, a comparative run (A) was made using a mixture of C4 to C8 alcohols as frothing agent. A number of bis(alkyl)esters of sulfosuccinic acid, soaium salt were run at the same dosage as frother above. An additional number of runs were made using a combination of the conventional frother and a bis(alkyl)ester of sulfo-succinic acid, sodium salt.
The various results obtained and details of th~ runs are given in Table I which follows.
The results show the reduced ash content obtained by the conditioning agent of the present invention. Such re-duction leads to higher BTU values for the coal.
.. . .
lS5 ~, H ~ c~ H ~1 ~ ~ .~ O
E~ ,1 ~ ~ ~ u~ 1~ Lf) ~ o~ 1~ 0 ~ O ~ ~
r z ,~
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O O 00 1~ ~ OD ~ ~ I~ I~ ~ ~ ~ I~ ~O C~ ~
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OE-l ~ P~ h C~ V~ H ~ H H H 0 o o ~ u~ ~ i ~ u~ nO ~
F4 l 4 H
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~ :~ ~ ooooooooooooooo H ~1 ~! 3 g ~ y~ ! ~X ,~ x~
: ~ H C~ O C~ ~7 O
q ~
--6_ , . ~ . .
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¢ Zi O
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" , Exa~le 1~
A further series of froth flotations were run to demonstrate that the conditioning agents used in the process of the present invention can replace the oil used in conventional frother-oil combinations. The fine coal pro-cessed was obtained from a different source than that used in the previous examples. The slurxy contained 4.6% crude coal of about 42.0% ash. In a comparative run (B~, the coal slurry was froth-floated using only a C4-C8 alcohol mixture as frother. In another comparatiYe run (C), a mixture of the C4-C8 alcohol frother and No. 2 fuel oil was used to froth-float the coal. In an embodiment of the present in-Yention, bis(tridecyl)sulfosuccinic acid, sodium salt was used to replace the oil in comparative run (CI. Results and details of these runs are given in Table II, ~hich follows.
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.,.~,. ~ .
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rr U~ o ~ o ~ ,, p o _ ~, ,~ ,~
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.
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ss The results show that a small usage of a bis(alkyl)-ester of a sulfosuccinic acid salt effectively r~places a larger quantity of fuel oil.
Example 20 The same fine coal slurry source used in Example l9 was employed. In a comparative run (D), the amount of oil used in comparative run (C) was increased. In an embodiment of the invention, a small quantity of the bis(alkyl)-ester used in Example l9 was added to combination of frother10 and fuel oil. Details and results are given in Table III, which follows.
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These results show that the bis(alkyl)ester of sulfosuccinic acid salt can overcome the adverse effects on recoYery of excess oil.
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Claims (27)
1. A process for recovering fine coal which comprises conditioning an aqueous slurry of fine coal with an effective amount of a bis(alkyl)ester of a sulfosuccinic acid salt of the general structure wherein R is a linear or branched chain alkyl group of about 4 to 20 carbon atoms and M is a cation providing a water--soluble salt, and thereafter froth-floating the conditioned slurry to obtain a coal concentrate as the float.
2. The process of Claim 1 wherein said bis(alkyl)-ester of a sulfosuccinic acid salt is the bis(isobutyl) ester of sodium sulfosuccinate.
3. The process of Claim 1 wherein said bis(alkyl)-ester of a sulfosuccinic acid salt is the bis(amyl) ester of sodium sulfosuccinate.
4. The process of Claim 1 wherein said bis(alkyl)-ester of a sulfosuccinic acid salt is the bis(hexyl)ester of sodium sulfosuccinate.
5. The process of Claim 1 wherein said bis(alkyl)-ester of a sulfosuccinic acid salt is the bis(cyclohexyl)ester of sodium sulfosuccinate.
6. The process of Claim 1 wherein said bis(alkyl)-ester of a sulfosuccinic acid salt is the bis(2-ethylhexyl)-ester of sodium sulfosuccinate.
7. The process of Claim 1 wherein said bis(alkyl)-ester of a sulfosuccinic acid salt is the bis(isodecyl)ester of sodium sulfosuccinate.
8. The process of Claim 1 wherein in addition to said bis(ester) of a sulfosuccinic acid salt, there is also employed an effective amount of a frothing agent.
9. The process of Claim 8 wherein said frothing agent is a mixture of C4-C8 alcohols.
10. The process of Claim 8 wherein said bis(alkyl)-ester of a sulfosuccinic acid salt is the bis(isobutyl)ester sodium sulfosuccinate.
11. The process of Claim 8 wherein said bis(alkyl)-ester of a sulfosuccinic acid salt is the bis(amyl) ester of sodium sulfosuccinate.
12. The process of Claim 8 wherein said bis(alkyl)-ester of a sulfosuccinic acid salt is the bis(hexyl) ester of sodium sulfosuccinate.
13. The process of Claim 8 wherein said bis(alkyl)-ester of a sulfosuccinic acid salt is the bis(cyclohexyl)-ester of sodium sulfosuccinate.
14. The process of Claim 8 wherein said bis(alkyl)-ester of a sulfosuccinic acid salt is the bis(isodecyl)ester of sodium sulfosuccinate.
15. The process of Claim 8 wherein said bis(alkyl)-ester of a sulfosuccinic acid salt is the bis(2-ethylhexyl)-ester of a sodium sulfosuccinate.
16. The process of Claim 8 wherein in addition to said bis(alkyl)ester of a sulfosuccinic acid salt and said frothing agent, there is also employed an effective amount of an oil.
17. The process of Claim 16 wherein said bis(alkyl)-ester of a sulfosuccinic acid salt is the bis(tridecyl)ester of sodium sulfosuccinate, the frothing agent is a mixture of C4-C8 alcohols, and said oil is No. 2 fuel oil.
18. A conditioning agent for use in the froth flo-tation of fine coal which comprises from about 1 to about 99 weight percent of a frother and, correspondingly, from about 99 to about 1 weight percent of a bis(alkyl)ester of a sulfosuccinic acid salt of the general structure wherein R is a linear or branched chain alkyl group of about 3 to 20 carbon atoms and M is a cation providing a water-soluble salt.
19. The conditioning agent of Claim 18 wherein said bis(alkyl)ester of a sulfosuccinic acid salt is the bis(isobutyl)ester of sodium sulfosuccinate.
20. The conditioning agent of Claim 18 wherein said bis(alkyl)ester of a sulfosuccinic acid is the bis(amyl)-ester of sodium sulfosuccinate.
21. The conditioning agent of Claim 18 wherein said bis(alkyl)ester of a sulfosuccinic acid salt is the bis(hexyl)-ester of sodium sulfosuccinate.
22. The conditioning agent of Claim 18 wherein said bis(alkyl)ester of a sulfosuccinic acid salt is the bis(cyclohexyl)ester of sodium sulfosuccinate.
23. the conditioning agent of Claim 18 wherein said bis(alkyl)ester of a sulfosuccinic acid salt is the bis(2-ethylhexyl)ester of sodium sulfosuccinate.
24. The conditioning agent of Claim 18 wherein said bis(alkyl)ester of a sulfosuccinic acid salt is the bis(isodecyl)ester of sodium sulfosuccinate.
25. The conditioning agent of Claim 18 wherein said frother is a mixture of C4-C8 alcohols.
26. The conditioning agent of Claim 18 also containing an oil.
27. The conditioning agent of Claim 26 wherein said oil is a fuel oil.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/897,233 US4199065A (en) | 1978-04-17 | 1978-04-17 | Process for recovery of fine coal |
| US05/897,230 US4196092A (en) | 1978-04-17 | 1978-04-17 | Conditioning agent for froth flotation of fine coal |
| US897,230 | 1986-08-18 | ||
| US897,233 | 1992-06-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1111155A true CA1111155A (en) | 1981-10-20 |
Family
ID=27129174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA319,380A Expired CA1111155A (en) | 1978-04-17 | 1979-01-10 | Ore beneficiation |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS54139802A (en) |
| AU (1) | AU530409B2 (en) |
| CA (1) | CA1111155A (en) |
| DD (1) | DD142891A5 (en) |
| DE (1) | DE2914050C2 (en) |
| FR (1) | FR2423264A1 (en) |
| PL (2) | PL119669B1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4304573A (en) * | 1980-01-22 | 1981-12-08 | Gulf & Western Industries, Inc. | Process of beneficiating coal and product |
| JPS59127660A (en) * | 1983-01-07 | 1984-07-23 | Kawasaki Heavy Ind Ltd | Treatment of coal ash and low grade coal |
| GB2163975B (en) * | 1984-09-06 | 1987-12-31 | American Cyanamid Co | Froth flotation of coal |
| GB8917426D0 (en) * | 1989-07-29 | 1989-09-13 | Fospur Ltd | Froth flotation of calcium borate minerals |
| PL241425B1 (en) | 2019-02-08 | 2022-09-26 | Droździk Radosław Felicitas A-C | Container station for hydrogen production and distribution |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3102856A (en) * | 1960-06-24 | 1963-09-03 | Johnson & Johnson | Platy talc beneficiation |
| GB1110643A (en) * | 1966-02-23 | 1968-04-24 | Nathaniel Arbiter | Benefication of cassiterite ores by froth flotation |
| US3469693A (en) * | 1966-02-23 | 1969-09-30 | Nathaniel Arbiter | Beneficiation of ores by froth flotation using sulfosuccinamates |
| US3915391A (en) * | 1972-07-17 | 1975-10-28 | Engelhard Min & Chem | Recovery of scheelite from ores by flotation |
-
1979
- 1979-01-10 CA CA319,380A patent/CA1111155A/en not_active Expired
- 1979-01-15 AU AU43372/79A patent/AU530409B2/en not_active Expired
- 1979-01-26 FR FR7902032A patent/FR2423264A1/en active Granted
- 1979-04-06 DE DE2914050A patent/DE2914050C2/en not_active Expired
- 1979-04-14 PL PL1979214901A patent/PL119669B1/en unknown
- 1979-04-14 PL PL1979227873A patent/PL119578B1/en unknown
- 1979-04-16 JP JP4552479A patent/JPS54139802A/en active Granted
- 1979-04-16 DD DD79212242A patent/DD142891A5/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| PL214901A1 (en) | 1980-02-11 |
| DE2914050C2 (en) | 1986-08-21 |
| JPS6211628B2 (en) | 1987-03-13 |
| DE2914050A1 (en) | 1979-10-25 |
| DD142891A5 (en) | 1980-07-16 |
| PL119578B1 (en) | 1982-01-30 |
| JPS54139802A (en) | 1979-10-30 |
| PL119669B1 (en) | 1982-01-30 |
| AU4337279A (en) | 1979-10-25 |
| FR2423264B1 (en) | 1982-12-10 |
| AU530409B2 (en) | 1983-07-14 |
| FR2423264A1 (en) | 1979-11-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |