ZA200203243B - A method for aggregating fine-particle coal by using the styrene-butadiene latex. - Google Patents
A method for aggregating fine-particle coal by using the styrene-butadiene latex. Download PDFInfo
- Publication number
- ZA200203243B ZA200203243B ZA200203243A ZA200203243A ZA200203243B ZA 200203243 B ZA200203243 B ZA 200203243B ZA 200203243 A ZA200203243 A ZA 200203243A ZA 200203243 A ZA200203243 A ZA 200203243A ZA 200203243 B ZA200203243 B ZA 200203243B
- Authority
- ZA
- South Africa
- Prior art keywords
- styrene
- butadiene latex
- weight
- particle coal
- fine
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 33
- 239000003245 coal Substances 0.000 title claims description 31
- 239000004816 latex Substances 0.000 title claims description 22
- 239000002174 Styrene-butadiene Substances 0.000 title claims description 21
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 title claims description 21
- 229920000126 latex Polymers 0.000 title claims description 21
- 239000011115 styrene butadiene Substances 0.000 title claims description 21
- 229920003048 styrene butadiene rubber Polymers 0.000 title claims description 21
- 239000010419 fine particle Substances 0.000 title claims description 20
- 230000004931 aggregating effect Effects 0.000 title claims description 6
- 239000011230 binding agent Substances 0.000 claims description 12
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 6
- 239000001110 calcium chloride Substances 0.000 claims description 6
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 6
- 239000000839 emulsion Substances 0.000 claims description 5
- 239000002562 thickening agent Substances 0.000 claims description 5
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 4
- 229920000609 methyl cellulose Polymers 0.000 claims description 4
- 239000001923 methylcellulose Substances 0.000 claims description 4
- 235000010981 methylcellulose Nutrition 0.000 claims description 4
- 229920002472 Starch Polymers 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 229920002125 Sokalan® Polymers 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 2
- 239000000440 bentonite Substances 0.000 claims description 2
- 229910000278 bentonite Inorganic materials 0.000 claims description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 2
- 239000005018 casein Substances 0.000 claims description 2
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 claims description 2
- 235000021240 caseins Nutrition 0.000 claims description 2
- 239000008119 colloidal silica Substances 0.000 claims description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 2
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 2
- 235000013379 molasses Nutrition 0.000 claims description 2
- 239000004584 polyacrylic acid Substances 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 230000008961 swelling Effects 0.000 claims description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 claims 1
- 239000001913 cellulose Substances 0.000 claims 1
- 229920002678 cellulose Polymers 0.000 claims 1
- 235000010980 cellulose Nutrition 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 238000004220 aggregation Methods 0.000 description 17
- 230000002776 aggregation Effects 0.000 description 17
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010348 incorporation Methods 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002699 waste material Substances 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
- C10L5/00—Solid fuels
-
- 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
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
- C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders
- C10L5/14—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders with organic binders
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Description
. °C WO 01/34734 PCT/KR00/00742
A METHOD FOR AGGREGATING FINE-PARTICLE COAL BY USING THE
STYRENE-BUTADIENE LATEX
This invention relates to a method for aggregating fine-particle coal, more specifically, by using the styrene-butadiene latex as a binder.
The coal for use in a corex process is required larger than 8 mm in size. But large amounts of imported coal(maximum 60%) for use in the corex process comprises particles smaller than 8 mm in size. So imported coal can not be employed in the corex process but utilized just in the PCI or cokes process.
The characteristics of coal for use in the corex process are too limited to use the other processes. Therefore the ratio of coarse-particle coal should be increased and fine- particle coal should be treated appropriately to improve the efficiency of the corex process.
The method for aggregating fine-particle and feeding into corex is said to be the most useful among many methods for treating the fine-particle coal. For instances, sulfurous waste solution, starch or asphalt has becn used as a binder in the aggregation process of finc-particle coal.
But the methods set forth above have been known that large amounts of a binder(10-20 weight %) should be utilized. which correspondingly leads to high cost for production. Other problems exist in the said methods. For example. a binder requires to be heated above the melting point and to be fused prior to the aggregation, and wetted fine-particle coal needs to be dried prior to the aggregation. The methods mentioned above cause the complicated aggregation process
Cl WO 01/34734 PCT/KR00/00742
The present invention is based upon the discovery that the styrene-butadiene latex can be used as a binder in the aggregation process of fine-particle coal. In addition, the styrene-butadiene latex, which 1s water-based emulsion. can be used to bind inorganic materials, such as calcium chloride, clay, silicate.
This invention provides a method for decreasing the amounts of a binder used.
The invention also provides a method for lowering aggregation temperature to room temperature, and for aggregating wetted coal without any further dry process in the aggregation process of fine-particle coal.
In accordance with the present invention. the styrene-butadiene latex is utilized as a binder, more specifically, used in an amount of from about 0.5% to about 5% by weight in the aggregation process of fine-particle coal.
The invention is described in more detail as set forth hereunder.
Since the styrene-butadiene latex is water-based emulsion, the styrene- butadiene latex is easily mixed with coal. In addition the styrene-butadiene latex can be employed to bind inorganic materials. such as calcium chloride. clay. silicate due to the double bond of butadiene in polymer which gives an adhesive force.
If the styrene-butadiene latex is used more than about 5 weight %, the compression strength will decrease owing to too much elasticity. If the styrene- butadiene latex is utilized under about 0.5 weight %, aggregation will not occur.
Accordingly the styrene-butadiene latex requires to be used in an amount from about 0.5% to about 5% by weight when mixed with fine-particle coal.
Since the styrene-butadiene latex is water-based emulsion, the wetted fine- particle coal can be aggregated without any further dry process.
A fine-particle coal and a binder should be mixed homogeneously and aggregated at a certain temperature. That is, the temperature of asphalt should be raised at about 110~130C, but the styrene-butadiene latex can be used at about 0~50C.
If desired, the curing accelerators, such as calcium chloride, aluminum sulfate. magnesium sulfate and hydrosilicofluoric acid can be utilized at a level of from about 0.1% to about 2.0% by weight during the aggregation to improve dry rate and initial strength and to facilitate curing.
The natural thickeners, such as methyl cellulose, carboxymethyl cellulose, starch, molasses, casein, and the synthetic thickeners, such as polyacrylic acid. polyvinyl alcohol, alkaline swelling emulsion, can be also added about 0.1~2.0% by weight to improve initial strength. The inorganic thickeners, such as bentonite. colloidal silica can be likewise added.
If desired, said curing agents and thickener can be employed in the aggregation process of fine-particle coal at the same time.
Best Mode for Carrying out the Invention
The following examples illustrate the specific embodiments of the present invention.
EXAMPLE 1
The compression strength was evaluated when the styrene-butadiene latex was used as a binder in the aggregation process of fine-particle coal smaller than 2 mm in size.
The aggregated coal tested for the compression strength was prepared in accordance with the following procedure;
To fine-particle coal smaller than 2 mm in size. the solution of 100 weight parts of the styrene-butadiene latex with the weight % according to table 1, 400 weight parts of the de-ionized water was added and mixed homogeneously and then fed into the crucible. And it was followed by the aggregation step for 10 seconds in mould maintained at approximately 25°C. Thereafter the aggregated coal was taken out of the mould and was stored.
Each aggregated coal with the different amount of weight % of the styrene- butadiene latex was tested for compression strength with the following time. The results were as follows.
Table 1
Compression strength(kg/cm”)
Sample latex 10 min 100 hours
T weight % 2 weight % 303.3 3 weight % 32 310.7 [Oweight% [30
EXAMPLE 2
To fine-particle coal smaller than 2 mm in size, the solution of 100 weight parts of the styrene-butadiene latex with the weight % according to table 2, 1.2 weight parts of methyl cellulose and 400 weight parts of the de-ionized water was added. The following steps were performed in the same way as the example 1. The results were as follows:
Table 2 :
Compression strength(kg/cm”)
Sample Taiex 100 hours
Tweigh% [45 [98 [350 [943
T weight %
Sweight% [68 [157 [97 [325
T0 weight %
These results demonstrate that an increase in compression strength was obtained by the incorporation of methyl cellulose,
EXAMPLE 3
To fine-particle coal smaller than 2 mm in size. the solution of 100 weight parts of the styrene-butadiene latex with the weight % according to table 3, 0.1 weight parts of calcium chloride and 400 weight parts of the de-ionized water was added. The following steps were performed in the same way as the example 1. The results were as follows:
Table 3
Compression strength(kg/cm”)
Sample latex 100 Fours weight % 3 weight % 345 8
TOweigh% [109 [173 [55 [275
These results indicate that an increase in compression strength was obtained by the incorporation of calcium chloride,
As described above, this invention has several advantages in that the amounts of a binder used can be decreased, aggregation temperature can be lowered to room temperature, and wetted coal can be aggregated without any further dry process in the aggregation process of fine-particle coal. Accordingly this invention can offer opportunities for reduced binder consumption in the aggregation process and for simplifying the complicated aggregation process and thus improved process economics.
Claims (4)
1. A method for aggregating fine-particle coal by using the styrene-butadiene as a binder.
2. The method of claim | which also contains one or more of the thickeners selected from the group consisting of methyl cellulose, carboxymethyl! cellulose, starch, molasses. casein, sodium polyacrylic acid, polyvinyl alcohol. alkaline swelling emulsion. bentonite and colloidal silica
3. The method of claim 1 or claim 2 which also contains one or more of the curing accelerators selected from the group consisting of calcium chloride, aluminum sulfate, magnesium sulfate and hydrosilicofluoric acid.
4. The method of claim 1 wherein the styrene-butadiene latex is present in an amount of from about 0.5% to about 5 % by weight.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990049685A KR100314707B1 (en) | 1999-11-10 | 1999-11-10 | Massive method of the powder coal by using styrene-butadiene latex |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ZA200203243B true ZA200203243B (en) | 2003-09-29 |
Family
ID=19619381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ZA200203243A ZA200203243B (en) | 1999-11-10 | 2002-04-24 | A method for aggregating fine-particle coal by using the styrene-butadiene latex. |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR100314707B1 (en) |
| AU (1) | AU758977B2 (en) |
| WO (1) | WO2001034734A1 (en) |
| ZA (1) | ZA200203243B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100401983B1 (en) * | 1998-10-12 | 2003-12-18 | 주식회사 포스코 | Manufacturing method of coal briquettes |
| KR100407799B1 (en) * | 1998-12-14 | 2004-01-24 | 주식회사 포스코 | Method for manufacturing coal briquettes using polymer resin |
| CN102796585B (en) * | 2012-08-24 | 2013-12-25 | 广西金壮锦节能技术有限公司 | Coal briquette composite crosslinking binder and production method thereof |
| EP3266855A4 (en) * | 2015-03-04 | 2018-05-23 | Posco | Coal briquettes, method and apparatus for manufacturing the same, and method and apparatus for manufacturing molten iron |
| KR101914087B1 (en) * | 2016-11-28 | 2018-11-01 | 주식회사 포스코 | Manufacturing method of briquette and briquette |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4025596A (en) * | 1973-10-03 | 1977-05-24 | The Dow Chemical Company | Method for pelletizing finely divided solids |
| US4415337A (en) * | 1982-05-05 | 1983-11-15 | Atlantic Richfield Company | Method for producing agglomerate particles from an aqueous feed slurry comprising finely divided coal and finely divided inorganic solids |
-
1999
- 1999-11-10 KR KR1019990049685A patent/KR100314707B1/en not_active IP Right Cessation
-
2000
- 2000-07-10 WO PCT/KR2000/000742 patent/WO2001034734A1/en active IP Right Grant
- 2000-07-10 AU AU58545/00A patent/AU758977B2/en not_active Ceased
-
2002
- 2002-04-24 ZA ZA200203243A patent/ZA200203243B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| KR20010046083A (en) | 2001-06-05 |
| AU5854500A (en) | 2001-06-06 |
| AU758977B2 (en) | 2003-04-03 |
| KR100314707B1 (en) | 2001-11-15 |
| WO2001034734A1 (en) | 2001-05-17 |
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