GB2082089A - Improvements in froth flotation - Google Patents
Improvements in froth flotation Download PDFInfo
- Publication number
- GB2082089A GB2082089A GB8027412A GB8027412A GB2082089A GB 2082089 A GB2082089 A GB 2082089A GB 8027412 A GB8027412 A GB 8027412A GB 8027412 A GB8027412 A GB 8027412A GB 2082089 A GB2082089 A GB 2082089A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oil
- collector
- froth flotation
- coal
- frother
- 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.)
- Granted
Links
- 238000009291 froth flotation Methods 0.000 title claims abstract description 37
- 239000003921 oil Substances 0.000 claims abstract description 53
- 239000003245 coal Substances 0.000 claims abstract description 31
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 24
- 239000011707 mineral Substances 0.000 claims abstract description 24
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229920000151 polyglycol Polymers 0.000 claims abstract description 7
- 239000010695 polyglycol Substances 0.000 claims abstract description 7
- 239000007921 spray Substances 0.000 claims abstract description 7
- 239000000571 coke Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 10
- 239000000725 suspension Substances 0.000 claims description 10
- 238000009835 boiling Methods 0.000 claims description 4
- 239000003350 kerosene Substances 0.000 claims description 4
- 239000003345 natural gas Substances 0.000 claims description 4
- 239000003209 petroleum derivative Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 239000004215 Carbon black (E152) Substances 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 2
- 125000003118 aryl group Chemical group 0.000 claims description 2
- 238000004939 coking Methods 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000007796 conventional method Methods 0.000 claims description 2
- 239000002283 diesel fuel Substances 0.000 claims description 2
- 238000004821 distillation Methods 0.000 claims description 2
- 239000000295 fuel oil Substances 0.000 claims description 2
- 229930195733 hydrocarbon Natural products 0.000 claims description 2
- 150000002430 hydrocarbons Chemical class 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000003498 natural gas condensate Substances 0.000 claims description 2
- 239000003208 petroleum Substances 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 239000010936 titanium Substances 0.000 claims description 2
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
- B03D1/02—Froth-flotation processes
-
- 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
- B03D1/0043—Organic compounds modified so as to contain a polyether group
-
- 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
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/008—Organic compounds containing oxygen
-
- 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
- B03D2201/02—Collectors
-
- 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
- Physical Water Treatments (AREA)
Abstract
This invention relates to froth flotation of coal. According to the invention a predominantly paraffinic residual oil having a cut point of at least 190 DEG C at atmospheric pressure is used as a "collector" for the froth flotation of minerals. A preferred oil is a coal spray oil used in coke oven technology. The "collector" is for use with a "frother" such as a polyglycol ether.
Description
SPECIFICATION
Improvements in froth flotation
This invention concerns improvements in froth flotation, especially the froth flotation of coal.
The technique of froth flotation of minerals is well
known in the art, and is described in the literature,
for example "Handbook of Mineral Dressing" by A.F.
Taggart, John Wiley & Sons, 1954, Section 12. In the
coal industry, froth flotation is used to treat suspen
sions of coal fines which are difficult to treat in any
other way. Conventional techniques involve the
addition of a froth flotation oil to the suspension of
the mineral and the passage of air through the
suspension to create bubbles which carry the fine
mineral to the surface to form a froth rich in
minerals, the froth then being removed and the
mineral recovered therefrom. The froth flotation oil
may be a single compound or mixture of com
pounds of similar characteristics, but it is modern
good practice, at least in the coal industry, to use a
combination of a "frother" and a "collector".The
"frothers" usable are of classes broadly known in
the art, and the "collector" is usually a hydrocarbon
oil of which distillate oils such as kerosene, industrial
diesel fuel and furnace oil are the most widely used,
especially kerosene. It has been suggested that good
collectors for fine coal suspensions are those having
a high proportion of aromatic hydrocarbons because
of their affinity for the coal which has a polynuclear
aromatic structure.
The present invention is based on the discovery
that instead of the distillate oils commonly used as
"collectors", a residual oil can be used which offers
certain advantages in selectivity.
The present invention provides the use of a
predominantly paraffinic residual oil having a cut
point of at least 190 C at atmospheric pressure as a
"collector" for the froth flotation of minerals.
The invention also provides a method of treating
minerals by froth flotation comprising the operation
of a froth flotation cell using a "collector" which is a
predominantly paraffinic residual oil having a cut
point of least 1 900C at atmospheric pressure.
The residual oil has preferably no or less than 10%,
especially less than 6%, of aromatics present and
preferably has no or only a small proportion (e.g.
less than 10%, especially less than 5%) of naph
thenes. Thus, the residual oil is preferably a mixture
of normal and branched alkanes greaterthan 80% in
total, more preferably greater than 89%, by wt. A
preferred residual oil is that which has been used as
a coal spray oil, which is used to spray coal in coke
oven technology. Coal spray oil can be prepared by removing all components boiling up to 1900C by
distillation from a natural or petroleum gas conde
nsate.
The "collector" of the invention may be used
together with a "frother". A preferred "frother" is a
polyglycol ether, and these are commercially avail
able. The "frother" may be present in admixture
with the collector in an amount of up to 40%, suitably
10 to 20%, but the "collector" and "frother" may be +A thA froth {lAt^tiAn II lA/hilo tho "collector" of the invention is particularly useful for the froth flotation of coals, it is also applicable to any mineral requiring an oily "collector", of which talc and the titanium ore illmanite may be mentioned.
The invention will now be described by way of
Example.
Example
A residual oil was obtained by distilling off components boiling upto 190from a North Sea natural gas condensate.
A mixture of this residual oil and a conventional polyglycol ether"frother" in an amount of 10% by weight was used in conventional amounts in a conventional full scale froth flotation cell fed with a suspension of fine coal which was an effluent stream from a colliery coal preparation plant. The cell operated completely satisfactorily and it was found that there was a reduction of ash content in the coal-rich froth, compared with the use of known "collector" and "frother".
The above mentioned mixture was used at a colliery coal preparation plant which had been using a commercial phenolic froth flotation solution consisting of "collector" and a "frother" and which had experienced difficulty in keeping ash-in-froth consistently below 12% for the production of coking coals.
Using the mixture of the invention, the ash-in-froth was consistently below 12% and averaged 1.5 percentage points improvement compared to previous practice, each taken over a 1 week period.
Ash-in-tailings were consistently greater than the target figure of 70%.
1. The use of a predominantly paraffinic petroleum residual oil having a cut point of at least 190"C at atmospheric pressure, as a "collector" for the froth flotation of minerals.
2. The use according to claim 1, in the froth flotation of coal fines.
3. The use according to claim 1 or 2, wherein the oil has less than 10% of aromatics present therein.
4. The use according to claim 3, wherein the oil has less than 6% of aromatics present therein.
5. The use according to any one of the preceding claims, wherein the oil has less than 10% of naphthenes therein.
6. The use according to claim 5, wherein the oil has less than 5% of naphthenes therein.
7. The use according to any one of the preceding claims, wherein the oil is a residual oil from a natural or petroleum gas condensate.
8. The use according to any one of the preceding claims, wherein the "collector" is in admixture with a "frother" in an amount of 10 to 20% by weight.
9. The use according to claim 1, substantially as hereinbefore described.
10. A method of treating minerals by froth flotation comprising the operation of a froth flotation cell using a "collector" which is a predominantly paraffinic residual oil having a cut point of at least 190"C at atmospheric pressure.
11 A method accordina to claim 10, wherein the
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (19)
1. The use of a predominantly paraffinic petroleum residual oil having a cut point of at least 190"C at atmospheric pressure, as a "collector" for the froth flotation of minerals.
2. The use according to claim 1, in the froth flotation of coal fines.
3. The use according to claim 1 or 2, wherein the oil has less than 10% of aromatics present therein.
4. The use according to claim 3, wherein the oil has less than 6% of aromatics present therein.
5. The use according to any one of the preceding claims, wherein the oil has less than 10% of naphthenes therein.
6. The use according to claim 5, wherein the oil has less than 5% of naphthenes therein.
7. The use according to any one of the preceding claims, wherein the oil is a residual oil from a natural or petroleum gas condensate.
8. The use according to any one of the preceding claims, wherein the "collector" is in admixture with a "frother" in an amount of 10 to 20% by weight.
9. The use according to claim 1, substantially as hereinbefore described.
10. A method of treating minerals by froth flotation comprising the operation of a froth flotation cell using a "collector" which is a predominantly paraffinic residual oil having a cut point of at least 190"C at atmospheric pressure.
11 A method accordina to claim 10, wherein the mineral is coal.
12. A method according to claim 10 or 11, wherein the oil has less than 10% of aromatics present therein, by weight.
13. A method according to claim 12, wherein the oil has less than 6% of aromatics therein, by weight.
14. A method according to any one of claims 10 to 13, wherein the oil has less than 10% of naphthenes present therein, by weight.
15. A method according to claim 14,wherein the oil has less than 5% of naphthenes present therein, by weight.
16. A method according to any one of claims 10 to 15, wherein the "collector" is used in association with a "frother".
17. Amethod according to claim 16, wherein the "frother" is a polyglycol ether.
18. A method according to claim 17, wherein the polyglycol ether "frother" is present in admixture with the "collector" in an amount of 10-20% by weight
19. A method according to claim 10, substantially as hereinbefore described.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8027412A GB2082089B (en) | 1980-08-22 | 1980-08-22 | Improvements in froth flotation |
| AU73866/81A AU540510B2 (en) | 1980-08-22 | 1981-08-07 | Froth flotation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8027412A GB2082089B (en) | 1980-08-22 | 1980-08-22 | Improvements in froth flotation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2082089A true GB2082089A (en) | 1982-03-03 |
| GB2082089B GB2082089B (en) | 1983-09-01 |
Family
ID=10515617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8027412A Expired GB2082089B (en) | 1980-08-22 | 1980-08-22 | Improvements in froth flotation |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU540510B2 (en) |
| GB (1) | GB2082089B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8136669B2 (en) | 2005-02-08 | 2012-03-20 | Filler Paul A | Process and composition for froth flotation |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1318730C (en) * | 1985-05-30 | 1993-06-01 | C. Edward Capes | Method of separating carbonaceous components from particulate coal containing inorganic solids and apparatus therefor |
-
1980
- 1980-08-22 GB GB8027412A patent/GB2082089B/en not_active Expired
-
1981
- 1981-08-07 AU AU73866/81A patent/AU540510B2/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8136669B2 (en) | 2005-02-08 | 2012-03-20 | Filler Paul A | Process and composition for froth flotation |
| US20120132571A1 (en) * | 2005-02-08 | 2012-05-31 | Filler Paul A | Process and Composition for Froth Flotation |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2082089B (en) | 1983-09-01 |
| AU7386681A (en) | 1982-02-25 |
| AU540510B2 (en) | 1984-11-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |