SE426053C - SET TO MAKE PLASTIC PRODUCTS - Google Patents
SET TO MAKE PLASTIC PRODUCTSInfo
- Publication number
- SE426053C SE426053C SE7807807A SE7807807A SE426053C SE 426053 C SE426053 C SE 426053C SE 7807807 A SE7807807 A SE 7807807A SE 7807807 A SE7807807 A SE 7807807A SE 426053 C SE426053 C SE 426053C
- Authority
- SE
- Sweden
- Prior art keywords
- gypsum
- dihydrate
- products
- plastic products
- potassium
- Prior art date
Links
- 239000004033 plastic Substances 0.000 title description 4
- 229920003023 plastic Polymers 0.000 title description 4
- 239000010440 gypsum Substances 0.000 claims description 20
- 229910052602 gypsum Inorganic materials 0.000 claims description 20
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 11
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 11
- 235000011151 potassium sulphates Nutrition 0.000 claims description 11
- 239000001120 potassium sulphate Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims description 2
- 239000000654 additive Substances 0.000 description 10
- 239000002002 slurry Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 6
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 5
- 150000004683 dihydrates Chemical class 0.000 description 5
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 239000001099 ammonium carbonate Substances 0.000 description 3
- 239000011505 plaster Substances 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 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 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 235000012501 ammonium carbonate Nutrition 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 235000012245 magnesium oxide Nutrition 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010451 perlite Substances 0.000 description 2
- 235000019362 perlite Nutrition 0.000 description 2
- 235000015497 potassium bicarbonate Nutrition 0.000 description 2
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 2
- 239000011736 potassium bicarbonate Substances 0.000 description 2
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- FHVDTGUDJYJELY-UHFFFAOYSA-N 6-{[2-carboxy-4,5-dihydroxy-6-(phosphanyloxy)oxan-3-yl]oxy}-4,5-dihydroxy-3-phosphanyloxane-2-carboxylic acid Chemical compound O1C(C(O)=O)C(P)C(O)C(O)C1OC1C(C(O)=O)OC(OP)C(O)C1O FHVDTGUDJYJELY-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 244000248349 Citrus limon Species 0.000 description 1
- 235000005979 Citrus limon Nutrition 0.000 description 1
- 229920002261 Corn starch Polymers 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- JLPKWZRZKCYKAZ-UHFFFAOYSA-N O.O.[S--].[Ca++] Chemical compound O.O.[S--].[Ca++] JLPKWZRZKCYKAZ-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- DZHMRSPXDUUJER-UHFFFAOYSA-N [amino(hydroxy)methylidene]azanium;dihydrogen phosphate Chemical compound NC(N)=O.OP(O)(O)=O DZHMRSPXDUUJER-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229940072056 alginate Drugs 0.000 description 1
- 235000010443 alginic acid Nutrition 0.000 description 1
- 229920000615 alginic acid Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 210000003056 antler Anatomy 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 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
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 239000008120 corn starch Substances 0.000 description 1
- 229940099112 cornstarch Drugs 0.000 description 1
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229940005740 hexametaphosphate Drugs 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- -1 hydrogen hexafluorosilicate Chemical class 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000005341 metaphosphate group Chemical group 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- UIIMBOGNXHQVGW-UHFFFAOYSA-N sodium;hydron;carbonate Chemical compound [Na+].OC(O)=O UIIMBOGNXHQVGW-UHFFFAOYSA-N 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009331 sowing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/141—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing dihydrated gypsum before the final hardening step, e.g. forming a dihydrated gypsum product followed by a de- and rehydration step
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Description
l0 15 20 30 40 7807807-8 2 Silikat cirka 2 viktprocent Tungmetaller 10 g/ton Lakvattens-pH Z-3 _ Vatten cirka 25 víktprocent Kornstorleks- fördelning 70 % <74 pm Andra utgångsmaterial kan användas, t ex dihydratgips som erhålles vid rökgasrening, och naturligt förekommande dihydrat- gips. Det är även möjligt att såsom utgångsmaterial återanvända de enligt föreliggande uppfinning erhållna produkterna, som då krossas och uppslammas i vatten. l0 15 20 30 40 7807807-8 2 Silicate about 2% by weight Heavy metals 10 g / ton Leachate pH Z-3 _ Water about 25% by weight Grain size distribution 70% <74 pm Other starting materials can be used, such as dihydrate gypsum such as obtained by flue gas purification, and naturally occurring dihydrate plaster. It is also possible to reuse as starting material the products obtained according to the present invention, as then crushed and slurried in water.
Den tillsatta mängden kaliumsulfat är minst 3 viktprocent, varvid lämpliga mängder har visat sig vara 5-40%, företrädesvis 6-20%, räknat pä mängden kalcíumsulfatdihydrat (CaS04 2 H20).The amount of potassium sulphate added is at least 3% by weight, wherein appropriate amounts have been found to be 5-40%, preferably 6-20%, based on the amount of calcium sulphate dihydrate (CaSO 4 2 H 2 O).
Det har ävenledes visat sig, att olika medel kan lnblandas i föreliggande utgångsuppslamning, varvid gipsprodukter erhålles med olika modifieringar i egenskaperna. Det är möjligt att till- sätta semihydratgips. Tillsats av vattenglas, såsom natronvat- tenglas, ökar hårdheten. Plaster, såsom polyakrylat och melamín- harts, eller samtidigt med gípsprodukternas stelnande härdande plastutgängsmaterial kan tillsättas för ökning av hållfastheten eller vattenhärdigheten. Andra tillsatsmedel är kalciumsilikat, karboximetylcellulosa, bentonit och cement.It has also been found that different agents can be mixed in the present starting slurry, whereby gypsum products are obtained with various modifications in the properties. It is possible to put semi-hydrated plaster. Addition of water glasses, such as baking soda binds, increases the hardness. Plastics such as polyacrylate and melamine resin, or simultaneously with the solidifying curing of the gypsum products plastic starting materials can be added to increase the strength or water resistance. Other additives are calcium silicate, carboxymethylcellulose, bentonite and cement.
Av speciellt betydelse såsom tillsatsmedel är sådana som åstadkommer porositet, t ex sådana av silíkattyp. Dessa till- satsmaterial utgöres exempelvis av perlit eller vermikulit. De erhållna produkterna, t ex plattor eller formar, är värmeisole- rande och har i lämplig tjocklek god böjstyvhet.Of particular importance as additives are those such as produces porosity, such as those of the silicate type. These batch material consists, for example, of perlite or vermiculite. The the products obtained, such as plates or molds, are heat-insulated and has good flexural stiffness in a suitable thickness.
För framställning av skumprodukter kan man istället för kaliumvätekarbonat tillsammans med kaliumsulfatet även tillsätta andra gasavgivande tillsatsmedel, såsom natriumvätekarbonat, väteperoxid, hjorthornssalt och aluminiumbrons. Dessa tillsats- medel bidrar dock icke till stelningseffekten, vilket är fallet med kaliumvätekarbonatet.For the production of foam products you can instead potassium bicarbonate together with potassium sulfate also add other gas-releasing additives, such as sodium bicarbonate, hydrogen peroxide, antler salt and aluminum bronze. These additives However, agents do not contribute to the solidifying effect, which is the case with the potassium bicarbonate.
Det är-möjligt och i många fall lämpligt att vid framställ- ningen av föreliggande gipsprodukter armera dem genom att i gips- uppslamningen ínblanda exempelvis stålfibrer och/eller glasfibrer.It is possible and in many cases appropriate that in the of the present gypsum products reinforce them by the slurry mixes, for example, steel fibers and / or glass fibers.
Sådana armeringsmedel som stänger och nät kan inbâddas vid dis- kontinuerlig framställning av formar eller plattor eller ingjutas vid kontinuerlig framställning av gipsplattor. Föreliggande gips- produkt, framför allt i form av gipsplatta, kan på i och för sig 10 15 20 30 35 40 7807807-8 känt sätt även gjutas på papp, Plast» f01í@ aV annat Slag» gummi' duk, trä eller metall. Dessa medel bidrar även till ökning av hållfastheten. En gipsprodukt enligt uppfíflnífl8°“= 50" icke är försedd med ytskikt på angivet sätt, kan doppas i eller behand- xempelvis kaliumsulfat eller ett borat, ket ökar härdheten och m tillsats las med en lösning av e såsom kalium- eller natriumtetraborat, vil Hârdheten kan även ökas genom att såso hàllfastheten. _ gipsens löslighet, så- användes ett medel, t ex salt som PåV@Tkar som natriumtiosaltet, -metafosfat och -hexametafosfat.Reinforcing agents such as bars and nets can be embedded in continuous production of molds or plates or molded in the continuous production of gypsum boards. The present plaster product, especially in the form of plasterboard, can on in itself 10 15 20 30 35 40 7807807-8 known method also cast on cardboard, Plastic »f01í @ aV other Type» rubber ' cloth, wood or metal. These funds also contribute to the increase of the strength. A gypsum product according to invention fl ní fl8 ° “= 50" is not provided with surface layers in the specified manner, can be dipped in or for example potassium sulphate or a borate, ket increases the hardness and m additive read with a solution of e such as potassium or sodium tetraborate, will The hardness can also be increased by sowing durability. _ the solubility of the gypsum, an agent such as salt such as PåV @ Tkar was used such as sodium thiosalt, metaphosphate and hexametaphosphate.
Ett tillsatsmedel, gipsprodukter, framför allt gipsplattor, avlut, speciellt på natriumbas. Vid användning av sulfítavlut såsom tillsatsmedel förbättras i mycket hög grad ytskiktsvidhäft- ning, speciellt av papp, vid gípsplattan. Hållfastheten förbätt- Ett annat medel, som även förbättrar ytskiktsvidhäft- Denna ger dock sämre resultat än sul- som visat sig giva överraskande goda är koncentrerad sulfít- ras även. ningen, är majsstärkelse. fitavlut.An additive, gypsum products, in particular gypsum boards, liquor, especially on sodium base. When using sulphite liquor as additives, the surface layer adhesion is greatly improved. ning, especially of cardboard, at the gypsum board. The strength improves Another agent that also improves surface adhesion However, this gives worse results than sul- which proved to be surprisingly good is concentrated sulphite race too. is cornstarch. fatavlut.
Andra tíllsatsmedel kan även användas, t ex medel som re- tarderar bindníngshastigheten, såsom soda, glycerol, alginat.Other additives may also be used, e.g. slows down the binding rate, such as soda, glycerol, alginate.
Andra tillsatsmedel är svavelsyra, vätehexafluorosílikat, citron- syra, ammoniumkarbonat, ureafosfat, ammoniak. Dessa medel använ- des bland annat för inställning av pH.Other additives are sulfuric acid, hydrogen hexafluorosilicate, lemon acid, ammonium carbonate, urea phosphate, ammonia. These agents are used was used, among other things, for adjusting the pH.
Om mycket högtemperaturhärdíga gipsprodukter önskas, är det lämpligt att inblanda magnesíumoxid i pulverform. Magnesíumoxíden kan härvid utgöra upp till 50 víktprocent av kalciumsulfatdihydra- tet. Det är härvid även lämpligt att inblanda perlít.If very high temperature curable gypsum products are desired, it is suitable for incorporating magnesium oxide in powder form. Magnesium oxides may in this case constitute up to 50% by weight of calcium sulphate dihydrate. tet. It is also suitable to mix perlite.
För variation av gipsprodukternas densitet kan man även variera vattenhalten, dvs späda ut kalclumsulfatdihydratuppslam- ningen med vatten, t ex så att 70 % av uppslamníngen utgöres av vatten, eller inblanda olika vätmedel. För åstadkommande av gips- produkter med speciellt låg densitet användes de redan beskrivna, gasavgívande medlen.For variation of the density of gypsum products, one can also vary the water content, i.e. dilute the calcium sulphate dihydrate slurry with water, for example so that 70% of the slurry consists of water, or mix different wetting agents. For the production of gypsum products with particularly low density, the ones already described were used, gas emitting agents.
Vid beskrivningen av föreliggande uppfinning har det angi- vits att uppslamningen av kalciumsulfatdihydrat "stelnar" eller "binder"; föreliggande förfarande skulle dock även kunna anses innebära ett "hardnande" av kalciumsulfntdíhydratet, dvs de inga- ende kornen blir hårdare resp hela den framställda gípsprodukten blir hårdare. Vid genomförandet av förfarandet har kaliumsulfa- tets kornstorlek viss betydelse, genom att processen sker snabba- re, ju finkornignre kaliumsulfatet är. Knliumsulfat med en korn- 10 15 20 25 7807807-8 4 storlek ned till 70 pm har provats och denna kornstorlek ger unge- fär samma hastighet för stelnandet som en vattenlösning av kalium- sulfat. De olika angivna tillsatsmedlen användes vanligen i en mängd av 1-15 viktprocent, räknat på den ingående mängden kalcium- sulfatdíhydrat.In describing the present invention, it has been stated that the slurry of calcium sulphate dihydrate "solidifies" or "binder"; however, the present procedure could also be considered involve a "hardening" of the calcium sulfide dihydrate, i.e. the the grains become harder and the whole gypsum product produced gets harder. In carrying out the process, potassium sulphate the grain size of the plant is of some importance, in that the process re, the finer grains the potassium sulfate is. Potassium sulphate with a granular 10 15 20 25 7807807-8 4 size down to 70 pm has been tried and this grain size gives approx. at the same rate of solidification as an aqueous solution of potassium sulphate. The various additives listed are usually used in one amount of 1-15% by weight, based on the amount of calcium sulfate dihydrate.
Uppfínningen beskrives närmare i följande exempel.The invention is described in more detail in the following examples.
Exempel 1. Till 1000 kg dihydratgípsuppslamning, innehållande 20 % vatten, sattes 50 kg KZSO4. Tillsatsen skedde under kraftig omröring vid 1400 r/min. Uppslamningen göts omedelbart till en platta resp gjordes kubíska provkroppar (5 cm x 5 cm x 5 cm).Example 1. To 1000 kg of dihydrate flu slurry, containing 20% water, 50 kg of K 2 SO 4 was added. The addition took place during vigorous stirring at 1400 rpm. The slurry was immediately poured into one plate resp were made cubic specimens (5 cm x 5 cm x 5 cm).
Plattan stelnade på mycket kort tid (någon minut). Provkropparna uppvisade efter 24 h en tryckhållfasthet av 8 MPa.The plate solidified in a very short time (a few minutes). The specimens exhibited after 24 hours a compressive strength of 8 MPa.
Exempel 2. 3600 kg díhydratgípsuppslamning innehållande 1400 kg vatten försattes under kraftig omröring, såsom i exempel 1, med 300 kg kalíumsulfat i fast form. Plattor och provkroppar framställdes såsom i exempel 1. Den erhållna plattans densitet var 1,1-1,3 g/cms. Provkropparnus tryckhâllfasthet var 4,1 MPa bestämd efter 4 dygn vid ZOOC eller 2 dygn vid 400C.Example 2. 3600 kg of dihydrate gypsum slurry containing 1400 kg of water was added with vigorous stirring, as in Example 1, with 300 kg of potassium sulphate in solid form. Plates and specimens was prepared as in Example 1. The density of the obtained plate was 1.1-1.3 g / cms. The compressive strength of the specimens was 4.1 MPa determined after 4 days at ZOOC or 2 days at 40 ° C.
Exempel 3. 1000 kg 72-procentig dihydratgips blandades med 35 kg ammoniumvätekarbonat och 60 kg kaliumsulfat. Blandningen göts i plana skivor. Efter en bindningstid av 15-20 minuter vid 13°C erhölls en platta med goda hållfasthetsegenskaper.Example 3. 1000 kg of 72% dihydrate gypsum was mixed with 35 kg ammonium bicarbonate and 60 kg of potassium sulphate. The mixture was poured in flat discs. After a binding time of 15-20 minutes at 13 ° C a plate with good strength properties was obtained.
Exempel 4. 100 kg semihydratgips, 1000 kg 72 à 73-procentig di- hydratgips, 35 kg ammoniumkarbonat och 60 kg kaliumsulfat blanda- des. efter en bindningstid ev 15-zo minuter vid 1390 efter gjut- níng till plattor erhölls plattor med något sämre egenskaper än dem enligt exempel 1.Example 4. 100 kg of semi-hydrate gypsum, 1000 kg of 72 to 73% di- hydrate gypsum, 35 kg of ammonium carbonate and 60 kg of potassium sulphate mixed des. after a setting time possibly 15-zo minutes at 1390 after casting ning for tiles, tiles with slightly worse properties than were obtained those according to Example 1.
Claims (2)
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7807807A SE426053C (en) | 1978-07-13 | 1978-07-13 | SET TO MAKE PLASTIC PRODUCTS |
| CA000331682A CA1135291A (en) | 1978-07-13 | 1979-07-12 | Method of preparing gypsum articles |
| FR7918086A FR2430921A1 (en) | 1978-07-13 | 1979-07-12 | PROCESS FOR PRODUCING GYPSUM ARTICLES |
| AU48879/79A AU528999B2 (en) | 1978-07-13 | 1979-07-12 | Preparing gypsum articles |
| PCT/SE1979/000154 WO1980000248A1 (en) | 1978-07-13 | 1979-07-12 | A method of preparing gypsum articles |
| JP50113979A JPS55500522A (en) | 1978-07-13 | 1979-07-12 | |
| GB8005042A GB2047675B (en) | 1978-07-13 | 1979-07-12 | Method of preparing gypsum articles |
| DE19792952945 DE2952945A1 (en) | 1978-07-13 | 1979-07-12 | A METHOD OF PREPARING GYPSUM ARTICLES |
| IN35/CAL/80A IN152205B (en) | 1978-07-13 | 1980-01-10 | |
| DK105780A DK105780A (en) | 1978-07-13 | 1980-03-12 | PROCEDURE FOR MANUFACTURING PLASTIC ART |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7807807A SE426053C (en) | 1978-07-13 | 1978-07-13 | SET TO MAKE PLASTIC PRODUCTS |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| SE7807807L SE7807807L (en) | 1980-01-14 |
| SE426053B SE426053B (en) | 1982-12-06 |
| SE426053C true SE426053C (en) | 1985-09-09 |
Family
ID=20335446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7807807A SE426053C (en) | 1978-07-13 | 1978-07-13 | SET TO MAKE PLASTIC PRODUCTS |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS55500522A (en) |
| AU (1) | AU528999B2 (en) |
| CA (1) | CA1135291A (en) |
| DK (1) | DK105780A (en) |
| FR (1) | FR2430921A1 (en) |
| GB (1) | GB2047675B (en) |
| SE (1) | SE426053C (en) |
| WO (1) | WO1980000248A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT380005B (en) * | 1980-01-09 | 1986-03-25 | Tenax Maskin Ab | METHOD FOR PRODUCING PLASTER PRODUCTS |
| AU2020202788A1 (en) * | 2020-04-27 | 2021-11-11 | Pact Renewables Pty Ltd | Mineral-based composites |
| WO2021258139A1 (en) * | 2020-06-25 | 2021-12-30 | Pact Renewables Pty Ltd | Degradable materials containing waste paper products |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE432542C (en) * | 1924-04-15 | 1926-08-09 | Morduch E Lewin | Process for the production of a cement-like mass |
| US3359146A (en) * | 1964-03-27 | 1967-12-19 | United States Gypsum Co | Method of producing gypsum articles having improved strength to density ratio |
| US3841886A (en) * | 1972-04-13 | 1974-10-15 | Motus Chem Inc | Refractory cement incorporating fluxing component |
| GB1371015A (en) * | 1972-05-15 | 1974-10-23 | Raytheon Co | Fabrication of foundry casting moulds and cores |
| JPS5313629A (en) * | 1976-07-23 | 1978-02-07 | Mitsubishi Mining & Cement Co | Gypsum series setting material production method |
| JPS53130723A (en) * | 1977-03-23 | 1978-11-15 | Mitsubishi Mining & Cement Co | Method of producing hardened body of gypsum reinforced with fiber |
| JPS53119918A (en) * | 1977-03-28 | 1978-10-19 | Chichibu Cement Kk | Light weight hardened body and its manufacture |
-
1978
- 1978-07-13 SE SE7807807A patent/SE426053C/en not_active IP Right Cessation
-
1979
- 1979-07-12 AU AU48879/79A patent/AU528999B2/en not_active Ceased
- 1979-07-12 FR FR7918086A patent/FR2430921A1/en active Granted
- 1979-07-12 GB GB8005042A patent/GB2047675B/en not_active Expired
- 1979-07-12 JP JP50113979A patent/JPS55500522A/ja active Pending
- 1979-07-12 CA CA000331682A patent/CA1135291A/en not_active Expired
- 1979-07-12 WO PCT/SE1979/000154 patent/WO1980000248A1/en unknown
-
1980
- 1980-03-12 DK DK105780A patent/DK105780A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| CA1135291A (en) | 1982-11-09 |
| GB2047675B (en) | 1984-02-29 |
| JPS55500522A (en) | 1980-08-14 |
| AU528999B2 (en) | 1983-05-19 |
| WO1980000248A1 (en) | 1980-02-21 |
| SE426053B (en) | 1982-12-06 |
| FR2430921A1 (en) | 1980-02-08 |
| FR2430921B1 (en) | 1984-12-21 |
| SE7807807L (en) | 1980-01-14 |
| DK105780A (en) | 1980-03-12 |
| GB2047675A (en) | 1980-12-03 |
| AU4887979A (en) | 1980-01-17 |
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