US3657135A - Process for binding of dust in mines - Google Patents
Process for binding of dust in mines Download PDFInfo
- Publication number
- US3657135A US3657135A US19514A US3657135DA US3657135A US 3657135 A US3657135 A US 3657135A US 19514 A US19514 A US 19514A US 3657135D A US3657135D A US 3657135DA US 3657135 A US3657135 A US 3657135A
- Authority
- US
- United States
- Prior art keywords
- salt
- dust
- water
- hygroscopic
- binding
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 title abstract description 16
- 230000008569 process Effects 0.000 title abstract description 16
- 239000000428 dust Substances 0.000 title description 19
- 150000003839 salts Chemical class 0.000 abstract description 46
- 239000012467 final product Substances 0.000 abstract description 9
- XLYOFNOQVPJJNP-PWCQTSIFSA-N Tritiated water Chemical compound [3H]O[3H] XLYOFNOQVPJJNP-PWCQTSIFSA-N 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 28
- 239000000463 material Substances 0.000 description 14
- 239000000843 powder Substances 0.000 description 14
- 239000000203 mixture Substances 0.000 description 12
- 239000000080 wetting agent Substances 0.000 description 11
- 230000006872 improvement Effects 0.000 description 10
- 239000002245 particle Substances 0.000 description 7
- 238000007664 blowing Methods 0.000 description 5
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 3
- 239000001110 calcium chloride Substances 0.000 description 3
- 229910001628 calcium chloride Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000003205 fragrance Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 206010040880 Skin irritation Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 230000001766 physiological effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000036556 skin irritation Effects 0.000 description 1
- 231100000475 skin irritation Toxicity 0.000 description 1
- 239000002699 waste material Substances 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
- E21F5/16—Layers of hygroscopic or other salts deposited on floors, walls, or the like, for binding dust; Deposition of such layers
Definitions
- the object of the DBP 1,243,129 (German patent) is a process for the binding of dust in coal mines whereby such dry, finely powdered hygroscopic salts, with or without the addition of wetting agents, are spread on the surface of the galleries.
- the salt particles gradually extract moisture from the air in the mines and deliquesce, thus forming the above mentioned dust-binding layer.
- this process has the advantage, as compared with older processes whereby the dust-binding layer is applied in the form of pastes or solutions, that the considerable amounts of water, necessary for the manufacture of pastes and solutions, do not have to be transported, it cannot be overlooked that this salt-dust process has another disadvantage.
- Applying powdery hygroscopic substances small quantities of very fine particles of these substances are carried away by the aircurrent, bothering and hampering miners exposed to such an air-current. For this reason the mining authorities stipulated that such powdery dust-binding agents are to be applied during shifts when only a reduced number of men or none at all are working.
- the process found consists of adding finely distributed water to the hygroscopic saltsprior to their applicain quantities of 120% by weight, in particular 6% by weight, related to the quantity of the hygroscopic salt, whereby the final product is to contain 74-90% by weight, preferably to by weight, of a hygroscopic salt.
- the quantity of water to be sprayed on is then determined by the water absorption capacity of the mixture; lump formation must be avoided.
- inert materials which can be admixed in filter-moist condition as, for example, waste gypsum obtained in phosphoric acid production.
- the water content of the inert materials must then be high enough to meet the aforementioned condition.
- the dust-binding material is to contain also a wetting agent
- the latter can be added separately or to the water to be sprayed on, i.e. in a suitable composition, the final product thus receiving simultaneously the desired quantity of the wetting agent as well as the amount of water required.
- a mixture is prepared consisting of 1 part by weight of a wetting agent and of l, 2 or 3 parts by weight of water.
- An adequate quantity of it is then added to the hygroscopic salt powder or its mixture with inert materials so that the final product contains, for instance, about 3% by weight of the wetting agent and 3 to 9% by weight of water, both related to the total weight of the final product.
- salt particles which nevertheless get into the air-current have lOst-due to the water sprayed on-the property to cause skin irritation.
- This phenomenon of the powder, manufactured according to the invention is rather surprising, as it is obviously not dependent upon the amount of water contained in the salt powder.
- the following two salt powders, for example, showed entirely opposite physiological effects.
- the first one was obtained by grinding calcium chloride 80% and the second one by grinding a substantially dryer Calcium chloride to which, after grinding and according to the invention, water was added increasing its CaC1 -content to the same concentration of 80%. While the former can be applied in the galleries only when the precautionary measures, described above, are taken, miners even working close by are hardly molested when the latter is applied.
- the process of the invention makes it possible to cover floors, roofs, etc. of the galleries in mines with a dust binding layer of finely powdered hygroscopic salts, substantial quantities of the salt powder not being carried away by the air-current, excluding also that the small remaining quantities of the salt powder which nevertheless get into the air-current cause irritations on the skin of miners exposed to that air-current. Therefore the application of the dust-binding layer can be carried out at any time without the necessity of having to wait for a shift when only a few miners or none at all are working.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Detergent Compositions (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Drying Of Gases (AREA)
- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
- Glanulating (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1915333A DE1915333C3 (de) | 1969-03-26 | 1969-03-26 | Verfahren zum Binden von Staub im Bergbau |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3657135A true US3657135A (en) | 1972-04-18 |
Family
ID=5729324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US19514A Expired - Lifetime US3657135A (en) | 1969-03-26 | 1970-03-13 | Process for binding of dust in mines |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3657135A (fr) |
| BE (1) | BE746896A (fr) |
| CS (1) | CS167893B2 (fr) |
| DE (1) | DE1915333C3 (fr) |
| FR (1) | FR2037538A5 (fr) |
| GB (1) | GB1267621A (fr) |
| PL (1) | PL70132B1 (fr) |
| SU (1) | SU631084A3 (fr) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3954662A (en) * | 1972-02-14 | 1976-05-04 | Monsanto Research Corporation | Aqueous foam compositions to suppress coal dust |
| US5397492A (en) * | 1993-06-07 | 1995-03-14 | Ossian, Inc. | Non-oil based sweeping compound |
| CN104140785A (zh) * | 2013-05-10 | 2014-11-12 | 亿利资源集团有限公司 | 一种电石粉抑尘成型剂及其制备和应用 |
-
1969
- 1969-03-26 DE DE1915333A patent/DE1915333C3/de not_active Expired
-
1970
- 1970-01-13 SU SU701393992A patent/SU631084A3/ru active
- 1970-03-02 CS CS1407A patent/CS167893B2/cs unknown
- 1970-03-03 FR FR7007552A patent/FR2037538A5/fr not_active Expired
- 1970-03-04 PL PL1970139184A patent/PL70132B1/pl unknown
- 1970-03-05 BE BE746896D patent/BE746896A/fr unknown
- 1970-03-13 US US19514A patent/US3657135A/en not_active Expired - Lifetime
- 1970-03-26 GB GB04911/70A patent/GB1267621A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3954662A (en) * | 1972-02-14 | 1976-05-04 | Monsanto Research Corporation | Aqueous foam compositions to suppress coal dust |
| US5397492A (en) * | 1993-06-07 | 1995-03-14 | Ossian, Inc. | Non-oil based sweeping compound |
| CN104140785A (zh) * | 2013-05-10 | 2014-11-12 | 亿利资源集团有限公司 | 一种电石粉抑尘成型剂及其制备和应用 |
| CN104140785B (zh) * | 2013-05-10 | 2016-08-10 | 亿利资源集团有限公司 | 一种电石粉抑尘成型剂及其制备和应用 |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1267621A (en) | 1972-03-22 |
| DE1915333C3 (de) | 1975-12-04 |
| DE1915333B2 (de) | 1973-11-08 |
| FR2037538A5 (fr) | 1970-12-31 |
| BE746896A (fr) | 1970-08-17 |
| DE1915333A1 (de) | 1970-10-08 |
| PL70132B1 (fr) | 1974-02-28 |
| SU631084A3 (ru) | 1978-10-30 |
| CS167893B2 (fr) | 1976-05-28 |
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