NO142337B - PROCEDURE FOR MANUFACTURING QUALITY QUALITY STEEL POWDER AND REGULATED DENSITY - Google Patents
PROCEDURE FOR MANUFACTURING QUALITY QUALITY STEEL POWDER AND REGULATED DENSITY Download PDFInfo
- Publication number
- NO142337B NO142337B NO742934A NO742934A NO142337B NO 142337 B NO142337 B NO 142337B NO 742934 A NO742934 A NO 742934A NO 742934 A NO742934 A NO 742934A NO 142337 B NO142337 B NO 142337B
- Authority
- NO
- Norway
- Prior art keywords
- water
- gel
- quality
- gel former
- former
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title description 3
- 238000000034 method Methods 0.000 title description 2
- 230000001105 regulatory effect Effects 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 48
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 239000003921 oil Substances 0.000 claims description 9
- 239000004215 Carbon black (E152) Substances 0.000 claims description 6
- 229930195733 hydrocarbon Natural products 0.000 claims description 6
- 150000002430 hydrocarbons Chemical class 0.000 claims description 6
- 229920000151 polyglycol Polymers 0.000 claims description 4
- 239000010695 polyglycol Substances 0.000 claims description 4
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical group C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 3
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 125000003118 aryl group Chemical group 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 125000001624 naphthyl group Chemical group 0.000 claims description 2
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 claims description 2
- -1 polyethylene Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000002562 thickening agent Substances 0.000 claims description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims 2
- 230000000694 effects Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 150000002170 ethers Chemical class 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
Landscapes
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
Description
ndsiuknin gsmiddel. disinfectant.
Til ildslukning anvendes for tiden ho-vedsakelig naturlig vann, som imidlertid gir dårlig virkning og i hvert fall må sprøy- Currently, natural water is mainly used for firefighting, which, however, has a poor effect and in any case must be sprayed
tes på ilden i store mengder med den følge at der kan oppstå vannskader som ofte er av en betydelig størrelsesorden. Årsaken hertil er at vannet så snart det har nådd ilden eller dens nærmeste omgivelser, umiddelbart flyter bort og fordampes, slik at den kjølende effekt som det tilførte vann har pr. volumenhet derfor blir me- is placed on the fire in large quantities with the consequence that water damage can occur, which is often of a significant magnitude. The reason for this is that as soon as the water has reached the fire or its immediate surroundings, it immediately flows away and evaporates, so that the cooling effect that the added water has per volume unit therefore becomes me-
get ubetydelig. Ildslukningsmidler av an- get insignificant. Fire extinguishers of
dre typer såsom skum, karbontetraklorid eller kullsyre, bygger vanligvis på det prin- other types such as foam, carbon tetrachloride or carbonic acid, are usually based on the principle
sipp at surstofftilførselen til ildstedet skal stoppes. Virkningen blir imidlertid også ved slike midler begrenset, bl. a. ved at midlet hurtig forsvinner fra stedet. Videre er det også tidligere kjent å tilsette en viskøs gummioppløsning i vann forskjellige sal- sip that the oxygen supply to the hearth is to be stopped. However, the effect is also limited by such means, e.g. a. in that the agent quickly disappears from the site. Furthermore, it is also previously known to add a viscous rubber solution in water to various sal-
ter, såsom pottaske og salmiakk, som i var- such as pot ash and salt vinegar, which in
men utvikler gasser som ikke kan under- but develops gases that cannot sub-
støtte forbrenningen. Virkningen av slike midler er imidlertid begrenset, bl. a. fordi midlet raskt forsvinner fra ilden. Visse ildslukningsmidler etterlater seg dessuten rester som er til ulempe ved opprydning etter brannen. support the combustion. However, the effect of such funds is limited, i.a. a. because the agent quickly disappears from the fire. Certain fire extinguishing agents also leave behind residues which are a disadvantage when cleaning up after the fire.
Hensikten med oppfinnelsen er å til-veiebringe et ildslukningsmiddel som inneholder en geldanner som sammen med vann danner en gel, her kalt vanngel, og som er særlig fordelaktig ved ildslukning. Geldanneren inneholder to eller flere kom- The purpose of the invention is to provide a fire-extinguishing agent which contains a gel former which, together with water, forms a gel, here called water gel, and which is particularly advantageous when extinguishing fires. The gel former contains two or more com-
ponenter som er i stand til å overføre vann til en slik form at gelen ved hjelp av van- ponents capable of transferring water to such a form that the gel with the help of water-
lige innretninger kan bres ut over store flater og bli liggende der som et sjikt, selv om flatene forløper vertikalt. straight devices can be spread out over large surfaces and remain there as a layer, even if the surfaces run vertically.
Ildslukningsmidlet ifølge oppfinnelsen The fire extinguishing agent according to the invention
er altså fremstilt på basis av vann tilsatt et fortykningsmiddel, og utmerker seg i det vesentlige ved at det består av vann som er tilsatt fra 0,1 til 10 pst. organisk geldanner som er sammensatt av et overflateaktivt polyethylenderivat og en lett eller tung, flyktig hydrocarbonolje, hvor blandingsforholdet i geldanneren er inn- is therefore produced on the basis of water with a thickening agent added, and is essentially distinguished by the fact that it consists of water to which from 0.1 to 10 per cent organic gel former has been added, which is composed of a surface-active polyethylene derivative and a light or heavy, volatile hydrocarbon oil, where the mixing ratio in the gel former is in-
stilt slik at den dannede vanngel hefter i tykke sjikt på vertikale flater. positioned so that the formed water gel adheres in thick layers to vertical surfaces.
Geldanneren består av en blanding av The gel former consists of a mixture of
en overflateaktiv komponent, som er lite eller ikke oppløselig i vann, og en hydro-karbonolje. Den overflateaktive kompo- a surfactant component, which is little or not soluble in water, and a hydrocarbon oil. The surfactant compo-
nent utgjøres fortrinnsvis av et eller flere polyethylenoxydderivater, f. eks. alkyl-, preferably consists of one or more polyethylene oxide derivatives, e.g. alkyl-,
aryl- eller naftylpolyglykoletere. Polygly-koleterne kan bestå av nonylfenolpolygly-koletere med opp til syv ethylenoxydgrup- aryl or naphthyl polyglycol ethers. The polyglycol ethers can consist of nonylphenol polyglycol ethers with up to seven ethylene oxide groups
per. Særlig gunstige resultater har man oppnådd med 3 å 4 ethylenoxydgrupper. Hydrokarbonolj en kan være en lett eller per. Particularly favorable results have been obtained with 3 to 4 ethylene oxide groups. Hydrocarbon oil can be a light or
tung olje. En lett olje kan være krystall- heavy oil. A light oil can be crystal-
olje, petroleum eller lignende. Geldannerne utgjøres i ovenstående eksempel av orga- oil, petroleum or the like. In the above example, the gel formers are made up of orga-
niske forbindelser som er flyktige ved van- nic compounds which are volatile in water-
lig temperatur. Forbindelsene kan hver for seg være flyktige i mindre grad enn vann, equal temperature. The compounds may individually be volatile to a lesser extent than water,
selv om dette ikke er noen betingelse, særlig med hensyn til hydrokarbonolj ekom-ponenten. Eventuelt kan geldannerens komponenter kjemisk påvirke eller reagere med hverandre. although this is not a condition, particularly with regard to the hydrocarbon oil component. Optionally, the components of the gel former may chemically affect or react with each other.
Den overflateaktive komponent som går inn i geldanneren kan utgjøre fra 10 —70 pst. Innholdet av oljekomponent kan være mellom 30 og 90 pst. I den ferdige vanngel skal geldanneren utgjøre fra 0,1 til 5 å 10 volumprosent. For ildsluknings-formål er det imidlertid i de fleste tilfelle ikke nødvendig å tilføre vannet mere enn 0,5—2 eller vel. 3 pst. geldanner. The surface-active component that goes into the gel former can make up from 10 to 70 per cent. The oil component content can be between 30 and 90 per cent. In the finished water gel, the gel former must make up from 0.1 to 5 to 10 per cent by volume. For fire-extinguishing purposes, however, in most cases it is not necessary to add more than 0.5-2 or well to the water. 3 percent gel former.
Som eksempel på en lagringsdyktig vanngel kan nevnes en komposisjon be-stående av 2 liter geldanner og 98 liter vann, hvor geldanneren inneholder 0,4 liter overflateaktiv komponent og 1,6 liter petroleum. As an example of a storable water gel, a composition consisting of 2 liters of gel former and 98 liters of water can be mentioned, where the gel former contains 0.4 liters of surfactant component and 1.6 liters of petroleum.
En vanngel med lagringsdyktighet opp til flere timer kan bestå av 0,2 liter geldanner og 99,8 liter vann, hvor geldanneren kan inneholde 0,12 liter overflateaktiv komponent og 0,08 liter petroleum. A water gel with a shelf life of up to several hours can consist of 0.2 liters of gel former and 99.8 liters of water, where the gel former can contain 0.12 liters of surface-active component and 0.08 liters of petroleum.
Lagringstiden for vanngelen, som kan gå opp i mange måneder eller år, øker med mengden av geldanner. Vanngelens fast-het øker med mengden av geldanner. Kon-istensen skal være slik at vanngelen kan påføres på vedkommende steder, f. eks. brennende vegger, ved påsprøytning eller lignende og altså slik at den kan danne stråler som kan gå forholdsvis lang strek-ning gjennom luften. På den annen side skal vanngelen selv i et skikt av forholdsvis stor tykkelse kunne hefte på en vertikal vegg. Disse vilkår oppfylles på en ut-merket måte av geldannere henholdsvis komposisjoner av ovenfor nevnte art. The storage time for the water gel, which can be many months or years, increases with the amount of gel formers. The firmness of the water gel increases with the amount of gel formers. The consistency must be such that the water gel can be applied to the relevant places, e.g. burning walls, by spraying or the like and thus so that it can form jets that can travel a relatively long distance through the air. On the other hand, even in a layer of relatively large thickness, the water angel must be able to adhere to a vertical wall. These conditions are fulfilled in an excellent way by gel formers or compositions of the above-mentioned type.
Vanngelen fremstilles ved at vann en-ten tilsettes geldanneren eller geldanneren tilsettes vann, i begge tilfelle under omrøring eller annen bearbeidelse. Vanngelen kan fremstilles på forhånd eller umiddelbart i forbindelse med anvendel-sen, f. eks. ved en ildebrann. Geldanneren kan da innføres ved overtrykk eller ved innsugning i en turbulent vannstrøm. Gel-dannelsen kan gjennomføres i en særskilt omrører. The water gel is produced by either adding water to the gel former or adding water to the gel former, in both cases during stirring or other processing. The water gel can be prepared in advance or immediately in connection with the application, e.g. by a fire. The gel former can then be introduced by overpressure or by suction in a turbulent water flow. The gel formation can be carried out in a special stirrer.
Vanngelens fremstilling tar bare noen få sekunder, slik at det ikke skaffer noen vanskeligheter å innkoble omrøreren i en ledning eller slange gjennom hvilken den ferdige gel sprøytes på ildstedet og hvilken igjen kan forsynes med vann fra vannled-ningsnettet eller en sprinkleranordning. The production of the water gel takes only a few seconds, so that there is no difficulty in connecting the stirrer to a line or hose through which the finished gel is sprayed onto the fireplace and which can in turn be supplied with water from the water supply network or a sprinkler device.
Det har vist seg at ved en og samme prosentvise sammensetning av komponen-tene gir en kraftig og forholdsvis langva-rig bearbeidelse en fastere gel enn en let-tere bearbeidelse. It has been shown that with one and the same percentage composition of the components, a vigorous and relatively long-lasting processing produces a firmer gel than a lighter processing.
En vanngel i henhold til oppfinnelsen har ikke lengre vannets flyteegenskaper, men kan påføres f. eks. en horisontal flate som et belegg og beholder sin form ufor-andret hvis den ikke utsettes for en skyve-kraft som feier den bort til siden. På lignende måte oppfører vanngelen seg når den skal anbringes på en vertikal flate. For at tyngdekraften skal gjøre seg gjel-dende, må haugen ha en forholdsvis stor høyde fra flaten, f. eks. flere centimeter. A water gel according to the invention no longer has the flow properties of water, but can be applied e.g. a horizontal surface as a covering and retains its shape unchanged if it is not subjected to a thrust force which sweeps it away to the side. The water angel behaves in a similar way when it is to be placed on a vertical surface. For gravity to take effect, the pile must have a relatively high height from the surface, e.g. several centimeters.
Vanngelen føres under overtrykk gjennom munnstykket for siden i stråleform å treffe ilden. Hvis en lang kastelengde kreves, utføres munnstykket med ett eller et fåtall hull. For en kortere kastelengde henholdsvis større sønderdeling av gelen i mindre stråler gis munnstykket et større antall hull, f. eks. 10—20. Hullene kan være 20—30 mm lange og divergere i strålenes retning. The water angel is passed under positive pressure through the nozzle so that it hits the fire in jet form. If a long throw length is required, the nozzle is made with one or a few holes. For a shorter throw length or greater breaking up of the gel into smaller jets, the nozzle is given a larger number of holes, e.g. 10-20. The holes can be 20-30 mm long and diverge in the direction of the beams.
Vannet behøver ikke å være særlig rent og til og med 3 pst. saltvannsoppløs-ning har vist seg anvendelig ved fremstilling av vanngel. En betydningsfull egenskap ved geldanneren i henhold til oppfinnelsen er at ingen av dens komponenter danner grobunn for mugg, mikroorganismer og lignende, slik som tilfelle er ved de van-lige skumvæsker. Geldanneren har ube-grenset lagringstid og befinner seg i fly-tende form selv ved meget lave tempera-turer, f. eks. ned til —50° C. The water does not have to be particularly clean and even a 3% salt water solution has proven to be useful in the production of water gel. An important feature of the gel former according to the invention is that none of its components form a breeding ground for mold, microorganisms and the like, as is the case with the usual foam liquids. The gel former has an unlimited storage time and is in liquid form even at very low temperatures, e.g. down to -50° C.
Til vanngelens utsprøytning kan brukes pumper gjennom hvilke vanngelen For the spraying of the water gel, pumps can be used through which the water gel
passerer. Videre kan sprøytningen foretas passes. Furthermore, the spraying can be carried out
ved hjelp av et gassformig medium, f. eks. luft eller kullsyre under trykk. Vanngelen kan oppbevares i ferdig form i håndild-slukningsapparater. by means of a gaseous medium, e.g. air or carbon dioxide under pressure. The water angel can be stored in its finished form in hand fire extinguishers.
En viktig egenskap ved midlet i henhold til oppfinnelsen er at samtlige be-standdeler i vanngelen er flyktige, dvs. at et skikt som er bredt ut over en flate for-damper etter en viss tid, f. eks. etter noen dager eller uker og ikke etterlater noen sjenerende rest. Et frittliggende skikt som består av vanngel bibeholder under av-dunstingen sin konsistens. Vanngelen er dessuten betraktelig motstandsdyktig mot intensiv varmestråling fra en ild og kan derfor legges i mere eller mindre tykt skikt umiddelbart ved eller på selve ildstedet, hvorved det frembringes en hurtig sluk-ning ved gelens kjølende henholdsvis kve-lende virkning. Den vanngelmengde som brukes utgjør bare en brøkdel av den nød-vendige vannmengde ved bruk av de van-lige ildslukningsmetoder for tilveiebrin-gelse av samme slukningsvirkning. An important feature of the agent according to the invention is that all components in the water gel are volatile, i.e. that a layer that is spread out over a surface evaporates after a certain time, e.g. after a few days or weeks and does not leave any embarrassing residue. A detached layer consisting of water gel retains its consistency during evaporation. The water gel is also considerably resistant to intensive heat radiation from a fire and can therefore be laid in a more or less thick layer immediately at or on the fire itself, whereby a rapid extinguishment is produced by the cooling or suffocating effect of the gel. The amount of water gel that is used constitutes only a fraction of the necessary amount of water when using the usual fire extinguishing methods to provide the same extinguishing effect.
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US389603A US3900309A (en) | 1973-08-16 | 1973-08-16 | Process for the production of high apparent density water atomized steel powders |
Publications (3)
Publication Number | Publication Date |
---|---|
NO742934L NO742934L (en) | 1975-03-17 |
NO142337B true NO142337B (en) | 1980-04-28 |
NO142337C NO142337C (en) | 1980-08-06 |
Family
ID=23538940
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO742934A NO142337C (en) | 1973-08-16 | 1974-08-15 | PROCEDURE FOR MANUFACTURING QUALITY QUALITY STEEL POWDER AND REGULATED DENSITY |
Country Status (19)
Country | Link |
---|---|
US (1) | US3900309A (en) |
JP (1) | JPS5737641B2 (en) |
AR (1) | AR201605A1 (en) |
BE (1) | BE818640A (en) |
BR (1) | BR7406686D0 (en) |
CA (1) | CA1041324A (en) |
CS (1) | CS204987B2 (en) |
DD (1) | DD113314A5 (en) |
DE (1) | DE2438841A1 (en) |
ES (1) | ES429260A1 (en) |
FR (1) | FR2245439B1 (en) |
GB (1) | GB1475421A (en) |
HU (1) | HU178361B (en) |
IT (1) | IT1016831B (en) |
NL (1) | NL7411023A (en) |
NO (1) | NO142337C (en) |
PL (1) | PL113721B1 (en) |
SE (1) | SE7410336L (en) |
YU (1) | YU224574A (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2806716C3 (en) * | 1978-02-14 | 1985-08-29 | Mannesmann AG, 4000 Düsseldorf | Process for making iron powder |
US4220689A (en) * | 1979-01-26 | 1980-09-02 | Armco Inc. | Galling resistant austenitic stainless steel powder product |
US4385929A (en) * | 1981-06-19 | 1983-05-31 | Sumitomo Metal Industries Limited | Method and apparatus for production of metal powder |
IT1192991B (en) * | 1981-09-15 | 1988-05-26 | Bruss Polt I | METALLIC FIBER MANUFACTURING PROCESS AND EQUIPMENT FOR ITS IMPLEMENTATION |
WO1983003375A1 (en) * | 1982-03-25 | 1983-10-13 | Stepanenko, Aleksandr, Vasilevich | Method and device for manufacturing metal fibres |
CA1192362A (en) * | 1982-08-10 | 1985-08-27 | Brunswick Mining And Smelting Corporation Limited | Wet zinc dust atomization and distribution |
US4602953A (en) * | 1985-03-13 | 1986-07-29 | Fine Particle Technology Corp. | Particulate material feedstock, use of said feedstock and product |
US4627959A (en) * | 1985-06-18 | 1986-12-09 | Inco Alloys International, Inc. | Production of mechanically alloyed powder |
JPS646145U (en) * | 1987-06-29 | 1989-01-13 | ||
EP0600421B1 (en) * | 1992-11-30 | 1997-10-08 | Sumitomo Electric Industries, Limited | Low alloy sintered steel and method of preparing the same |
SE9602835D0 (en) * | 1996-07-22 | 1996-07-22 | Hoeganaes Ab | Process for the preparation of an iron-based powder |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3325277A (en) * | 1965-02-01 | 1967-06-13 | Smith Corp A O | Method of making metal powder |
US3597188A (en) * | 1968-08-23 | 1971-08-03 | Domtar Ltd | Method of making high density iron powder |
US3668024A (en) * | 1969-10-07 | 1972-06-06 | Smith Inland A O | Method of annealing metal powder |
US3687654A (en) * | 1971-03-10 | 1972-08-29 | Smith Inland A O | Method of making alloy steel powder |
SE350770B (en) * | 1971-05-14 | 1972-11-06 | Hoeganaes Ab | |
US3725142A (en) * | 1971-08-23 | 1973-04-03 | Smith A Inland Inc | Atomized steel powder having improved hardenability |
-
1973
- 1973-08-16 US US389603A patent/US3900309A/en not_active Expired - Lifetime
-
1974
- 1974-07-31 AR AR254976A patent/AR201605A1/en active
- 1974-08-06 GB GB3465074A patent/GB1475421A/en not_active Expired
- 1974-08-08 BE BE147425A patent/BE818640A/en unknown
- 1974-08-13 SE SE7410336A patent/SE7410336L/en unknown
- 1974-08-13 FR FR7428096A patent/FR2245439B1/fr not_active Expired
- 1974-08-13 JP JP9206674A patent/JPS5737641B2/ja not_active Expired
- 1974-08-13 DE DE2438841A patent/DE2438841A1/en not_active Ceased
- 1974-08-14 BR BR6686/74A patent/BR7406686D0/en unknown
- 1974-08-14 IT IT69548/74A patent/IT1016831B/en active
- 1974-08-14 ES ES429260A patent/ES429260A1/en not_active Expired
- 1974-08-15 CS CS745721A patent/CS204987B2/en unknown
- 1974-08-15 NO NO742934A patent/NO142337C/en unknown
- 1974-08-15 CA CA207,148A patent/CA1041324A/en not_active Expired
- 1974-08-15 DD DD180521A patent/DD113314A5/xx unknown
- 1974-08-15 HU HU74UE53A patent/HU178361B/en unknown
- 1974-08-16 YU YU02245/74A patent/YU224574A/en unknown
- 1974-08-16 NL NL7411023A patent/NL7411023A/en not_active Application Discontinuation
- 1974-08-16 PL PL1974173529A patent/PL113721B1/en unknown
Also Published As
Publication number | Publication date |
---|---|
BE818640A (en) | 1975-02-10 |
JPS5064149A (en) | 1975-05-31 |
FR2245439A1 (en) | 1975-04-25 |
YU224574A (en) | 1982-02-28 |
NO742934L (en) | 1975-03-17 |
NL7411023A (en) | 1975-02-18 |
DE2438841A1 (en) | 1975-02-27 |
HU178361B (en) | 1982-04-28 |
NO142337C (en) | 1980-08-06 |
GB1475421A (en) | 1977-06-01 |
BR7406686D0 (en) | 1975-05-27 |
CA1041324A (en) | 1978-10-31 |
SE7410336L (en) | 1975-02-17 |
PL113721B1 (en) | 1980-12-31 |
AR201605A1 (en) | 1975-03-31 |
IT1016831B (en) | 1977-06-20 |
AU7153474A (en) | 1976-01-29 |
FR2245439B1 (en) | 1978-09-22 |
DD113314A5 (en) | 1975-06-05 |
CS204987B2 (en) | 1981-04-30 |
JPS5737641B2 (en) | 1982-08-11 |
US3900309A (en) | 1975-08-19 |
ES429260A1 (en) | 1976-08-16 |
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