GB2301130A - Dust suppression - Google Patents
Dust suppression Download PDFInfo
- Publication number
- GB2301130A GB2301130A GB9615761A GB9615761A GB2301130A GB 2301130 A GB2301130 A GB 2301130A GB 9615761 A GB9615761 A GB 9615761A GB 9615761 A GB9615761 A GB 9615761A GB 2301130 A GB2301130 A GB 2301130A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ammonium chloride
- diallyldimethyl ammonium
- chloride polymer
- particles
- dusting
- 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.)
- Withdrawn
Links
- 239000000428 dust Substances 0.000 title abstract description 9
- 230000001629 suppression Effects 0.000 title description 2
- 229920000642 polymer Polymers 0.000 claims abstract description 27
- 239000003245 coal Substances 0.000 claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 14
- NJSSICCENMLTKO-HRCBOCMUSA-N [(1r,2s,4r,5r)-3-hydroxy-4-(4-methylphenyl)sulfonyloxy-6,8-dioxabicyclo[3.2.1]octan-2-yl] 4-methylbenzenesulfonate Chemical compound C1=CC(C)=CC=C1S(=O)(=O)O[C@H]1C(O)[C@@H](OS(=O)(=O)C=2C=CC(C)=CC=2)[C@@H]2OC[C@H]1O2 NJSSICCENMLTKO-HRCBOCMUSA-N 0.000 claims abstract description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 7
- 239000011707 mineral Substances 0.000 claims abstract description 7
- 239000000178 monomer Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 13
- 238000010410 dusting Methods 0.000 claims description 10
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 5
- 229920002554 vinyl polymer Polymers 0.000 claims description 5
- 229920001519 homopolymer Polymers 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 239000003153 chemical reaction reagent Substances 0.000 description 8
- 229920001577 copolymer Polymers 0.000 description 7
- 239000003085 diluting agent Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000004094 surface-active agent Substances 0.000 description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 4
- 125000000129 anionic group Chemical group 0.000 description 4
- 238000007792 addition Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 229910001570 bauxite Inorganic materials 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 239000004908 Emulsion polymer Substances 0.000 description 1
- 229920001732 Lignosulfonate Polymers 0.000 description 1
- 239000004117 Lignosulphonate Substances 0.000 description 1
- 208000019693 Lung disease Diseases 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000011087 fumaric acid Nutrition 0.000 description 1
- 150000002238 fumaric acids Chemical class 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 235000019357 lignosulphonate Nutrition 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002734 metacrylic acid derivatives Chemical class 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920001206 natural gum Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Inorganic materials [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
- E21F5/06—Fluids used for spraying
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/22—Materials not provided for elsewhere for dust-laying or dust-absorbing
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Dilute solutions of diallyldimethyl ammonium chloride polymers are effective as dust suppressants for finely divided mineral and coal particles.
Description
The invention relates to the suppression of dust.
Dusts from such minerals as bauxite, clays and particularly coal, have the potential of causing lung disease, are eye irritants and can produce damage to property. These dusts are encountered in such areas as stockpiles, conveyors within and around mines or quarries, rail cars, ships, barges and trucks and unpaved roads.
Coal dusts present a particularly vexatious problem in that they are black and are capable of causing many respiratory ailments.
A common method used to reduce dusting is to spray the dust producing area with a fine spray of water.
Improved results are achieved in some cases when the sprayed water contains surfactants. While the spraying of water with or without surfactants helps reduce the amount of dusting it is not completely effective. If it were possible to provide an additive which when added to water would greatly improve its ability to control dusting of finely divided mineral particles, and in particular coal fines, a valuable contribution to the art would be afforded.
The present invention provides a method for suppressing the dusting of finely divided mineral particles which comprises spraying such particles with an effective amount of an aqueous solution which contains a diallyldimethyl ammonium chloride polymer which has an intrinsic viscosity of at least 0.3.
The present invention also provides a method for suppressing the dusting of finely divided coal particles which comprises spraying such particles with an effective amount of an aqueous solution which contains a diallyldimethyl ammonium chloride polymer which has an intrinsic viscosity of at least 0.3.
The diallyldimethyl ammonium chloride polymers (DADMAC) are particularly effective in treating coal particles to prevent dusting. By using the method of the invention it is possible to decrease the dustiness of mineral particles by increasing the capture of fine dust particles. In many cases the amount of water required to suppress dusting is substantially reduced. This is important in the case of minerals such as bauxite which becomes sticky and agglomerate when exposed to excessive moisture
The invention utilizes homo and copolymers of
DADMAC. The copolymers may contain from between 5-30 mole percent of a water soluble anionic monomer. These copolymers may be referred to as polyampholytes. In a preferred mode of the invention, the anionic monomer is either acrylic acid or methacrylic acid. Acrylic acid is preferred.The polymers are further characterized in that they have an Intrinsic Viscosity of at least 0.3, as measured in the 1 M NaN03 at 300 C.
Another embodiment of the invention resides in adding to the DADMAC copolymers a third non ionic diluent monomer in amounts up to about 10 mole percent.
The DADMAC polymers and ter-polymers that are used in the invention have a minimum Intrinsic Viscosity, hereafter IV. In a preferred embodiment the IV is between 0.3 and 0.9. Polymers of the invention may have IVs as high as 1.6 or higher.
The amount of water soluble anionic monomer polymerized with the DADMAC may vary from as little as about 5 mole percent to as much as 30 mole percent.
Preferably 10-30 mole percent is used.
While methacrylic and most preferably acrylic acid are preferred monomers for copolymerization with
DADMAC, other anionic vinyl monomers may be employed.
Examples of such monomers are maleic acid, itaconic acid and fumaric acids.
The diluent monomers that may be ter-polymerized with the DADMAC and the water soluble anionic monomer may be used in amounts ranging up to 10 mole percent.
Preferred diluent monomers are the hydroxy C2 -C6 alkyl acrylates of methacrylates. Other diluent monomers are illustrated by the monomers, acrylonitrile, acrylamide, styrene, vinyl acetate and the like. The polymers of the invention containing the diluent monomers are attractive from the standpoint that most of the diluent monomers are inexpensive and in most cases do not materially detract from the activity of the DADMAC copolymer into which they have been incorporated.
The co and ter-polymers of DADMAC as generally described above are illustrated in great detail in U.S.
Patent No. 4,715,962, the disclosure of which is incorporated herein by reference. One of the teachings of this reference is that the polymers may be in the form of aqueous solutions or in the form of water-in-oil emulsions which in the presence of certain water soluble surfactants invert into water and allow the polymer contained in the emulsions to dissolve rapidly. See also U.S. 5,013,456 which illustrates general DADMAC polymers that may be used in the invention. this patent is also incorporated herein by reference.
The dosage of the polymers usually is at minimum at least 25 parts per million of polymer solution (grams of product per ton of dust treated). Good results are achieved when the dosage ranges between 50-2,000 parts per million, ppm. Typical of the dosages that produce good results are those within the range of 100-1,000 ppm. The
DADMAC polymers and copolymers are usually in the form of aqueous solutions the polymer content of which ranges between 10-50% by weight. It is evident, therefor that the dosage will depend on the particular polymer used, its solutions's concentration and the amount of that solution applied to the dusting problem to be solved. In view of these variable routine experimentation must be used to optimize the particles of the invention.
Two samples of minus 40 mm production coal were used in the tests.
The as received samples were dry screened at -6.7 mm and subdivided into -1,200 g lots for the rotating drum dustiness test. The final moisture of the coal after the addition of the reagent solutions was set at 16 + 0.5%.
Prior to reagent application the coal was dried at 500C to either 12% or 14% moisture. The remaining water was added as part of the reagent solution. The 2% and 4% water addition enabled a broad range of reagent concentrations to be examined for the total application rates of 100-500-1,000 ppm selected. The application rates, solution concentrations and moisture additions tested for each reagent are presented in Table 1.
After drying and cooling the samples were transferred to a planetary mixer for reagent application and mixing. The reagent is added to the coal from a hand held spray gun and mixed for 5 minutes. The coal with reagent is then sealed in a plastic bag for 24 hours to allow the moisture to reach equilibrium between the surface and pore structure of the coal.
The prepared sample is then tested in a rotating drum dustiness apparatus.
The procedure involves:
Taking an initial moisture sample prior to loading the drum.
Rotating the drum at 30 rpm for 10 minutes with an air velocity of 3 ms The dust collected is weighed and a final moisture sample taken.
The dustiness is expressed as the proportion of the coal sample captured as dust.
All the tests were performed under constant environment conditions of temperature (250C + 20C and relative humidity (65% + 1%)).
To demonstrate the superiority of the DADMAC polymers of the invention as against surfactants and other polymers as dust suppressants such comparative evaluations are presented in Table 1.
TABLE I
Product TvPe Reduction in Dustiness
Dose (ppm)
100 500 1000
Alkylpolyglucoside Surfactant 10 20 5
Alkylpolyglucoside Surfactant 20 30 0
Natural Gum 5 5
Latex Emulsion Polymer 5 -
Lignosulphonate 5 5 5
EPI/DMA Coagulant (50%) 15 20 30
Polydadmac IV = 0.3 (40%) 20 30 40
Polydadmac IV = 0.1 (15%) 10 30 40
Polydadmac/acrylic acid (20%) 30 40 50 copolymer
NB: Concentration of Polymer: At 10 ppm = 1%
At 500 ppm = 5%
At 1000 ppm = 10%
Claims (8)
1. A method for suppressing the dusting of finely divided mineral particles which comprises spraying such particles with an effective amount of an aqueous solution which contains a diallyldimethyl ammonium chloride polymer which has an intrinsic viscosity of at least 0.3.
2. The method of Claim 1 where the diallyldimethyl ammonium chloride polymer is a homopolymer.
3. The method of Claim 1 where the diallyldimethyl ammonium chloride polymer contains between 5-50 mole percent of an anionic vinyl monomer.
4. The method of Claim 3 where the anionic vinyl monomer is acrylic acid.
5. A method for suppressing the dusting of finely divided coal particles which comprises spraying such particles with an effective amount of an aqueous solution which contains a diallyldimethyl ammonium chloride polymer which has an intrinsic viscosity of at least 0.3.
6. The method of Claim 5 where the diallyldimethyl ammonium chloride polymer is a homopolymer.
7. The method of Claim 5 where the diallyldimethyl ammonium chloride polymer contains between 5-50 mole percent of an anionic vinyl monomer.
8. The method of Claim 7 where the anionic vinyl monomer is acrylic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9615761A GB2301130A (en) | 1996-07-26 | 1996-07-26 | Dust suppression |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9615761A GB2301130A (en) | 1996-07-26 | 1996-07-26 | Dust suppression |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9615761D0 GB9615761D0 (en) | 1996-09-04 |
| GB2301130A true GB2301130A (en) | 1996-11-27 |
Family
ID=10797569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9615761A Withdrawn GB2301130A (en) | 1996-07-26 | 1996-07-26 | Dust suppression |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2301130A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619205B (en) * | 2009-08-13 | 2012-06-27 | 沈阳建筑大学 | Modified gelatin dust suppressant and preparation method thereof |
| RU2495250C1 (en) * | 2012-04-23 | 2013-10-10 | Андрей Федорович Глебов | Penetrating agent for coal dust suppression |
| WO2014115120A1 (en) * | 2013-01-28 | 2014-07-31 | Excellect 164 Cc | A composition for soil stabilization and dust suppression |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0134106A2 (en) * | 1983-07-28 | 1985-03-13 | Exxon Research And Engineering Company | Chemical formulation for soil stabilization and fugitive dust control |
| US4867613A (en) * | 1986-11-13 | 1989-09-19 | Allied Colloids, Ltd. | Treatment of inorganic particles with polymer |
| US5215784A (en) * | 1992-10-06 | 1993-06-01 | Nalco Australia Pty. Ltd. | Dust suppression of mineral and other inorganic particles |
-
1996
- 1996-07-26 GB GB9615761A patent/GB2301130A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0134106A2 (en) * | 1983-07-28 | 1985-03-13 | Exxon Research And Engineering Company | Chemical formulation for soil stabilization and fugitive dust control |
| US4867613A (en) * | 1986-11-13 | 1989-09-19 | Allied Colloids, Ltd. | Treatment of inorganic particles with polymer |
| US5215784A (en) * | 1992-10-06 | 1993-06-01 | Nalco Australia Pty. Ltd. | Dust suppression of mineral and other inorganic particles |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619205B (en) * | 2009-08-13 | 2012-06-27 | 沈阳建筑大学 | Modified gelatin dust suppressant and preparation method thereof |
| RU2495250C1 (en) * | 2012-04-23 | 2013-10-10 | Андрей Федорович Глебов | Penetrating agent for coal dust suppression |
| WO2014115120A1 (en) * | 2013-01-28 | 2014-07-31 | Excellect 164 Cc | A composition for soil stabilization and dust suppression |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9615761D0 (en) | 1996-09-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |