WO1987005226A1 - Protective treatment of coal - Google Patents
Protective treatment of coal Download PDFInfo
- Publication number
- WO1987005226A1 WO1987005226A1 PCT/AU1986/000055 AU8600055W WO8705226A1 WO 1987005226 A1 WO1987005226 A1 WO 1987005226A1 AU 8600055 W AU8600055 W AU 8600055W WO 8705226 A1 WO8705226 A1 WO 8705226A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coal
- mineral oil
- paraffinic mineral
- treating agent
- process according
- Prior art date
Links
- 239000003245 coal Substances 0.000 title claims abstract description 68
- 238000011282 treatment Methods 0.000 title claims abstract description 28
- 230000001681 protective effect Effects 0.000 title claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000002480 mineral oil Substances 0.000 claims abstract description 11
- 235000010446 mineral oil Nutrition 0.000 claims abstract description 11
- 239000000126 substance Substances 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims abstract description 6
- 125000002091 cationic group Chemical group 0.000 claims abstract description 3
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 18
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000003921 oil Substances 0.000 claims description 7
- 239000004094 surface-active agent Substances 0.000 claims description 7
- 229930006000 Sucrose Natural products 0.000 claims description 6
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims description 6
- 239000005720 sucrose Substances 0.000 claims description 6
- 239000004215 Carbon black (E152) Substances 0.000 claims description 5
- 229930195733 hydrocarbon Natural products 0.000 claims description 5
- 150000002430 hydrocarbons Chemical class 0.000 claims description 5
- 229920000098 polyolefin Polymers 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229920002125 Sokalan® Polymers 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 150000004985 diamines Chemical class 0.000 claims description 3
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 claims description 3
- 239000002562 thickening agent Substances 0.000 claims description 3
- 239000004034 viscosity adjusting agent Substances 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 2
- 239000007921 spray Substances 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 description 13
- 230000004888 barrier function Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000000080 wetting agent Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000135 prohibitive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/10—Treating solid fuels to improve their combustion by using additives
Definitions
- This invention relates to a protective treatment for coal and a composition for use in that protective treatment.
- Coal is mined, crushed, stockpiled and transported in extremely large quantities. Exposure to air and moisture promotes exothermic reactions which result in deterioration of the coal and, if the heat is not dispersed, may eventually support combustion. Severe losses may be sustained if effective precautions are not taken.
- Veneer coating of stockpiles with impervious coatings may be a chemical or tarpaulin type barrier.
- total treatment of a given quantity of coal involves contacting more than 50% of ,the coal particles therein with a treating agent. Preferably over 75%, and more preferably over 90%, of the particles are so contacted. In a preferred aspect this total treatment involves spraying coal with a chemical treating agent in such manner that all of the coal particles, or at least a large percentage of the finer coal fraction comes into contact with the chemical treating agent.
- the treating agent is preferably an emulsified hydrocarbon oil, and also containing certain other chemical specialty additives.
- the agent is diluted in water and is sprayed onto the coal surface.
- the level of dilution in the water phase is unimportant to the application
- the level of chemical added to the coal surface depends upon the nature of the coal and may vary, for example, from 15 to 1000 ppm. The broad nature of this addition rate is due to the very diverse nature of the coal types available for treatment.
- the present invention is a considerable advance in the art because, by total treatment of the coal, it avoids the need for repeating the protective treatment every time the coal is moved.
- Many coals, such as those coals to be blended and moved repeatedly after mining and crushing are generally precluded from mechanical treatments and may not even be suitable commercial commodities if a real problem exists.
- Total chemical treatment does not have such prohibitive effects as one treatment is suitable to inhibit self heating through a number of coal movements and stockpile residences. Consequently a coal formerly considered too hazardous to strip and stockpile may now be deemed safe using our total treatment. It follows that many coals precluded from export because of their propensity to self heat may now be considered as a possible viable export commodity.
- a preferred method of treatment comprises spraying of the coal in a falling stream situation, for example at a conveyor belt junction or conveyor belt transfer point.
- the treatment may be singular or multiple to achieve the total concentration of chemical on the coal surface that is required.
- coal is a naturally occurring mineral showing many diverse forms and composition, treatment levels vary accordingly.
- the treating agent of the invention is preferably a hydrocarbon oil emulsified in water with a cationic emulsifier.
- the hydrocarbon oil is preferably a paraffinic mineral oil that meets the following specifications:
- a suitable emulsion may contain
- Agent C has the following composition:
- Paraffinic Mineral Oil (CALTEX P300) 36.0% w/w Synthetic Polyolefin (HYVIS) 3.5
- Alkyldiamine surfactant (DIAMINE BG). 3.3 Commercial Oleine (PRIOLENE 6973) 1.0 Acrylic Thickening Agent (ACRYSOL ICS-I) 0.5
- agent C In field tests, the ability of agent C to inhibit oxidation in a stockpiling situation was measured. A number of coal shipments were treated with agent C at a dosage rate of approximately 150 ppm (at a cost of A$0.20 per tonne of coal) and the stockpile temperatures monitored as a function of time. The range of heating rates for these shipments are compared to that of the untreated coal, stockpiled under the same climatic conditions, in Table 2. The range of heating rates for a relatively safe storage coal is included in this table for comparison.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
A process and composition for protective treatment of coal comprises applying a chemical treating agent to a major proportion of coal particles in a quantity of coal by sprays (3), (4) directed upon a falling stream of coal. The treating agent is a paraffinic mineral oil emulsified with a cationic emulsifier.
Description
PROTECTIVE TREATMENT OF COAL
This invention relates to a protective treatment for coal and a composition for use in that protective treatment. Coal is mined, crushed, stockpiled and transported in extremely large quantities. Exposure to air and moisture promotes exothermic reactions which result in deterioration of the coal and, if the heat is not dispersed, may eventually support combustion. Severe losses may be sustained if effective precautions are not taken.
The self-heating characteristics of coal have been known for centuries but the mechanism is still not completely understood. Stockpiling techniques which minimize spontaneous combustion are well established but do not entirely overcome
the problem. Much greater, difficulties are encountered in the transportation of large quantities of coal, particularly in ships where spontaneous combustion is a major safety hazard in addition to the loss of valuable coal that it represents. The prior art has concentrated on limiting access of oxygen and/or moisture to bulk coal in an attempt to minimize the chemical reactions that cause self heating, while additionally or alternatively providing means to disperse the heat generated, for example by ventilation, so that some oxidation may occur without a dangerous rise in temperature. Some known physical/mechanical methods may be summarized as follows:-
1. Sophisticated stockpile construction with special attention to the even distribution of very fine particulates. This ensures generated heat is evenly distributed throughout the stockpile and not concentrated in an area with an excess of very fine, very high surface are material.
2. Veneer coating of stockpiles with impervious coatings. These may be a chemical or tarpaulin type barrier.
3. Surface compaction using heavy machinery to slow down the ingress of both air and moisture.
4. Stockpile configuration and alignment to minimize the interaction of the stockpile with prevailing winds.
All of the prior art methods involve treatment of the exterior of a stockpile, to provide a physical barrier to the ingress of moisture and air. The effectiveness of such treatments is limited as the barriers are easily broken.
It is an object of the present invention to provide a treatment which is more effective than the prior art.
In accordance with the present invention, treatment of the coal is not confined to the exterior of a heap or stockpile. As all of the coal surface, or at least a major part of it, is treated in accordance with the present invention, we refer to this technique as "total treatment".
"Total treatment" of a given quantity of coal involves contacting more than 50% of ,the coal particles therein with a treating agent. Preferably over 75%, and more preferably over 90%, of the particles are so contacted. In a preferred aspect this total treatment involves spraying coal with a chemical treating agent in such manner that all of the coal particles, or at least a large percentage of the finer coal fraction comes into contact with the chemical treating agent. The treating agent is preferably an emulsified hydrocarbon oil, and also containing certain other chemical specialty additives.
In one method of application the agent is diluted in water and is sprayed onto the coal surface. The level of dilution in the water phase is unimportant to the application
* as the water simply provides a vehicle to coat the coal surface. The level of chemical added to the coal surface, as distinct from the level of moisture added, depends upon the nature of the coal and may vary, for example, from 15 to 1000 ppm. The broad nature of this addition rate is due to the very diverse nature of the coal types available for treatment.
Although we do not wish to be limited by any theoretical or postulated mechanism for the observed beneficial effects, we believe that the important improvement in the technology now proposed over conventional methods of combating self heating in coal stockpiles and storage is tied up intimately with the total treatment of the coal surface, rather than just the exterior to the stockpile. We believe that our treatment provides an oil film on the coal surface which aids agglomeration of fine particles to others of the same size and/or to larger particulates in the same system. Both the' oil film and agglomeration appear to assist in the exclusion of moisture and air from the internal coal pore structure and the reduction of the total coal surface area available to external air and moisture ingress, which are prime environmental determinants in coal self heating.
The present invention is a considerable advance in the art because, by total treatment of the coal, it avoids the need for repeating the protective treatment every time the coal is moved. Many coals, such as those coals to be blended and moved repeatedly after mining and crushing are generally precluded from mechanical treatments and may not even be suitable commercial commodities if a real problem exists. Total chemical treatment does not have such prohibitive effects as one treatment is suitable to inhibit self heating through a number of coal movements and stockpile residences. Consequently a coal formerly considered too hazardous to strip and stockpile may now be deemed safe using our total treatment. It follows that many coals precluded from export because of their propensity to self heat may now be considered as a possible viable export commodity. The relatively large increases in possible stockpiling life made possible by the present invention will allow for exporters to consider larger bulk shipments with their attendant savings in freight. It follows as a natural corollary to the above that by retarding self heating, original fundamental coal properties are also retained on a relative bases. This suggests that large consumers would possibly aggregate large stockpiles to obviate irregularities of supply, safe in the knowledge that coal properties and thus- the inherent costs involved do not degrade during the subsequent stockpiling period. For producers, the opportunity provides itself to mine and produce on a continuous basis, safe also in the knowledge that their coal would remain within the specifications laid down by the consumer during periods of low demand. This is particularly relevant to steaming coals for power generation i.e. coals of lignitous or a sub-bituminous rank.
The experimental work outlined below, has established that the preferred emulsified hydrocarbon oil of the present invention is the most effective in the retardation of self heating over a range of coal types. Surface active agents were experimentally found less effective, as were polymeric
binders, in that, whilst providing pa icle-particle binding in most cases, the very large internal coal porosity was not excluded from the atmosphere. Levels of treatment from 0 to 500 ppm were examined, with effectiveness increasing abruptly in the 0-100 ppm regime and then more slowly after this level of addition. The use of higher dose rates, up to 1000 ppm is appropriate for coals of higher porosity.
In practice a preferred method of treatment comprises spraying of the coal in a falling stream situation, for example at a conveyor belt junction or conveyor belt transfer point. The treatment may be singular or multiple to achieve the total concentration of chemical on the coal surface that is required. As coal is a naturally occurring mineral showing many diverse forms and composition, treatment levels vary accordingly. By use of in line mixing of the
* chemical to the water (carrier) phase, the actual solution strength may be varied by use of a simple dosing pump adjustment. This simple method of application thus becomes part of coal production without adding to physical processing costs i.e. it does not include large capital equipment or labour costs.
Two methods of applying the spray are illustrated in the accompanying drawings.
In Figure 1, coal falls from a feed hopper 1 on to a conveyor 2, and the treating agent is applied via sprays 3, 4.
In Figure 2, at a conveyor transfer point coal falls from an upper conveyor 21 to a lower conveyor 22, and the treating agent is applied via sprays 23 and 24. An alternative spray point is shown at 24A. The treating agent of the invention is preferably a hydrocarbon oil emulsified in water with a cationic emulsifier.
The hydrocarbon oil is preferably a paraffinic mineral oil that meets the following specifications:
Colour Less than 1.5
Density 20°C 0.885 - 0.890 Viscosity 55 - 60 cst at 40°
7 - 8 cst at 100°C
Flashpoint 240°C min (COC)
Pour Point -8°C →- - 10°C Carbon Type: - aliphatic 63 - 65%
- naphthenic 27 - 28%
- aromatic 10% max
A suitable emulsion may contain
Component % by Weight
Paraffinic Mineral Oil 35 - 37
(as above)
Synthetic Polyo'lef: Ln 3.5
Alkyldiamine Surfactant 3.0 - - 3.5
Oleine 1.0
Viscosity Modifier 0.5
Hydrochloric Acid 0.4 - - 0.5
Formaldehyde 40% 0.1
Sucrose 0.03
Pink Dye 0.01
Water 54 - 56
Experimental
Using a calorimeter which measures the maximum temperature rise produced in a coal sample under different environmental conditions of humidity, temperature and oxygen content, the maximum temperature rise was determined under oxidizing conditions for four samples of the same coal type, treated with different agents. The results are give in Table 1.
TABLE 1
Max. Temp, Time to Max.
Agen Type Rise (°C) Temp. Rise (min
Untreated, - 3.4 780 A Wetting Agent 3.3 720
B Polymer Dispersant 2.5 780
C (see below) 1.4 660
D Diesel 2.8 690
Agent C has the following composition:
Paraffinic Mineral Oil (CALTEX P300) 36.0% w/w Synthetic Polyolefin (HYVIS) 3.5
Alkyldiamine surfactant (DIAMINE BG). 3.3 Commercial Oleine (PRIOLENE 6973) 1.0 Acrylic Thickening Agent (ACRYSOL ICS-I) 0.5
Commercial HYDROCHLORIC ACID 0.43
SUCROSE 0.03
FORMALDEHYDE 40% 0.10
RHODAMINE B Pink Dye 0.01 WATER 55.13
100.00
All the reagents, were tested on the same coal type at a dosage rate of 500 ppm equivalent to approximately 0.5 litres of agent per tonne of coal. The wetting agent (A) was the only agent tested which did not reduce the maximum temperature rise of the coal to any extent. The superiority of the treating agent according to the invention (agent C) is evident.
In field tests, the ability of agent C to inhibit oxidation in a stockpiling situation was measured. A number of coal shipments were treated with agent C at a dosage rate of approximately 150 ppm (at a cost of A$0.20 per tonne of coal) and the stockpile temperatures monitored as a function of time. The range of heating rates for these shipments are compared to that of the untreated coal, stockpiled under the same climatic conditions, in Table 2. The range of heating rates for a relatively safe storage coal is included in this table for comparison.
TABLE 2
Coal Stockpile Heating Rates
Coal Type Heating Rate (°C/day)
Safe Coal 0.20 - 0.25
Untreated Coal 0.88 - 1.30 Treated Coal 0.46 - 0.56
By lowering the heating rate agent C was found to increase the stockpiling life of the above coal from approximately six weeks to in excess of six months. In addition, the treated coal was observed to stop heating once the stockpile temperature reached approximately 60°C. This was not the case with the untreated coal.
Claims
1. A process for protective treatment of coal characterised in that a chemical treating agent is applied to a quantity of coal in such manner that at least 50% of the coal particles come into contact with the said treating agent.
2. Process according to Claim 1, in which the treating agent is an aqueous emulsion of a hydrocarbon oil.
3. Process according to Claim 2, in which the treating agent is a paraffinic mineral oil emulsified with a cationic emulsifier.
4. Process according to Claim 3, in which the paraffinic mineral oil meets the following speci ications:-
Colour Less than 1.5
Density 20°C 0.885 - 0.890
^Viscosity 55 - 60 cst at 40°
7 - 8 cst at 100°C
Flashpoint 240UC min (CO
Pour Point -8°C →-- 10°C
Carbon Type:
- aliphatic 63 - 65%
- naphthenic 27 - 28%
- aromatic 10% max
5. Process according to Claim 3, in which the treating. agent comprises the following components:
Component % by Weight
Paraffinic Mineral Oil 35 - 37
(as defined in Claim 4)
Synthetic Polyolefin 3.5
Alkyldiamine Surfactant 3.0 - - 3.5
Oleine 1.0
Viscosity Modifier 0.5
Hydrochloric Acid 0.4 - • 0.5
Formaldehyde 40% 0.1
Sucrose 0.03
Pink Dye 0.01
Water 54 - 56
6. Process according to Claim 3, in which the treating agent comprises the following components:-
Paraffinic Mineral Oil (CALTEX P300) 36.0% w/w
Synthetic Polyolefin (HYVIS) 3.5
Alkyldiamine surfactant (DIAMINE BG) 3.3
Commercial Oleine (PRIOLENE 6973) 1.0
Acrylic Thickening Agent (ACRYSOL ICS-I) 0.5
Commercial HYDROCHLORIC ACID 0.43
SUCROSE 0.03
FORMALDEHYDE 40% 0.10
RHODAMINE B Pink Dye 0.01
WATER 55.13
100.00
7. A composition of qnatter useful for the protective treatment of coal, comprising the following components:-
Component % by Weight
Paraffinic Mineral Oil 35 - 37
Synthetic Polyolefin 3.5
Alkyldiamine Surfactant 3.0 - 3.5
Oleine 1.0
Viscosity Modifier 0.5
Hydrochloric Acid 0.4 - 0.5
Formaldehyde 40% 0.1
Sucrose 0.03
Pi.nk Dye 0.01
Water 54 - 56
in which the paraffinic mineral oil meets the following specification:-
Colour Less than 1.5
Density 20°C 0.885 - 0.890
Viscosity 55 - 60 cst at 40°
7 - 8 cst at 100°C
Flashpoint 240 C min (CO'
Pour Point -8°C →- - 10°C
Carbon Type:
- aliphatic 63 - 65%
- naphthenic 27 - 28%
- aromatic 10% max
8. A composition of matter useful for the protective treatment of coal, comprising the following components:-
Paraffinic Mineral Oil (CALTEX P300) 36.0% w/w
Synthetic Polyolefin (HYVIS) 3.5
Alkyldiamine surfactant (DIAMINE BG) 3.3
Commercial Oleine (PRIOLENE 6973) 1.0
Acrylic Thickening Agent (ACRYSOL ICS-I) 0.5
Commercial HYDROCHLORIC ACID 0.43
SUCROSE 0.03
FORMALDEHYDE 40% 0.10
RHODAMINE B Pink Dye 0.01
WATER 55.13
100.00
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/AU1986/000055 WO1987005226A1 (en) | 1986-03-06 | 1986-03-06 | Protective treatment of coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/AU1986/000055 WO1987005226A1 (en) | 1986-03-06 | 1986-03-06 | Protective treatment of coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1987005226A1 true WO1987005226A1 (en) | 1987-09-11 |
Family
ID=3762502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/AU1986/000055 WO1987005226A1 (en) | 1986-03-06 | 1986-03-06 | Protective treatment of coal |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO1987005226A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994026404A1 (en) * | 1993-05-11 | 1994-11-24 | Colas Danmark A/S | An emulsion of oil in water |
| GB2279079A (en) * | 1993-06-15 | 1994-12-21 | Castrol Ltd | Aqueous dust suppressant composition comprising oil and emulsifier |
| WO2017074194A1 (en) | 2015-10-30 | 2017-05-04 | Instral Holding B.V. | A method of performing a treatment of a particulate raw material |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE513846C (en) * | 1925-05-15 | 1930-12-03 | Fritz Lydtin Dr | Process for the production of a dust binder for roads, etc. |
| US2222370A (en) * | 1939-03-01 | 1940-11-19 | Gulf Research Development Co | Laying dust in coal mines |
| GB1392984A (en) * | 1971-06-14 | 1975-05-07 | Kalk Chemische Fabrik Gmbh | Supressing spontaneous ignition of coal |
| FR2288775A1 (en) * | 1974-10-23 | 1976-05-21 | Exxon Research Engineering Co | Anti-dusting compsn for powders - comprises aq emulsion of low volatility org liq |
| DE2538276A1 (en) * | 1975-08-28 | 1977-04-14 | Kali & Salz Ag | Dust-binding agents for salts and fertilisers - contg. mixts. of paraffins and spindle- or mineral oil |
| AU1564683A (en) * | 1981-12-21 | 1984-12-13 | Atlantic Richfield Company | Method and apparatus for producing a dried coal fuel having a reduced tendency to spontaneously ignite from a low rank coal |
-
1986
- 1986-03-06 WO PCT/AU1986/000055 patent/WO1987005226A1/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE513846C (en) * | 1925-05-15 | 1930-12-03 | Fritz Lydtin Dr | Process for the production of a dust binder for roads, etc. |
| US2222370A (en) * | 1939-03-01 | 1940-11-19 | Gulf Research Development Co | Laying dust in coal mines |
| GB1392984A (en) * | 1971-06-14 | 1975-05-07 | Kalk Chemische Fabrik Gmbh | Supressing spontaneous ignition of coal |
| FR2288775A1 (en) * | 1974-10-23 | 1976-05-21 | Exxon Research Engineering Co | Anti-dusting compsn for powders - comprises aq emulsion of low volatility org liq |
| DE2538276A1 (en) * | 1975-08-28 | 1977-04-14 | Kali & Salz Ag | Dust-binding agents for salts and fertilisers - contg. mixts. of paraffins and spindle- or mineral oil |
| AU1564683A (en) * | 1981-12-21 | 1984-12-13 | Atlantic Richfield Company | Method and apparatus for producing a dried coal fuel having a reduced tendency to spontaneously ignite from a low rank coal |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994026404A1 (en) * | 1993-05-11 | 1994-11-24 | Colas Danmark A/S | An emulsion of oil in water |
| GB2279079A (en) * | 1993-06-15 | 1994-12-21 | Castrol Ltd | Aqueous dust suppressant composition comprising oil and emulsifier |
| GB2279079B (en) * | 1993-06-15 | 1997-09-24 | Castrol Ltd | A method for suppressing dust |
| WO2017074194A1 (en) | 2015-10-30 | 2017-05-04 | Instral Holding B.V. | A method of performing a treatment of a particulate raw material |
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