SE438456B - PROCEDURE FOR PREPARING CAST CORNES USING A CO? 712 SILICATE PROCEDURE AND Aqueous SILICATE BINDING SOLUTION - Google Patents
PROCEDURE FOR PREPARING CAST CORNES USING A CO? 712 SILICATE PROCEDURE AND Aqueous SILICATE BINDING SOLUTIONInfo
- Publication number
- SE438456B SE438456B SE7805139A SE7805139A SE438456B SE 438456 B SE438456 B SE 438456B SE 7805139 A SE7805139 A SE 7805139A SE 7805139 A SE7805139 A SE 7805139A SE 438456 B SE438456 B SE 438456B
- Authority
- SE
- Sweden
- Prior art keywords
- silicate
- procedure
- potassium
- binder
- molar
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title description 30
- 235000019353 potassium silicate Nutrition 0.000 claims description 35
- 239000004115 Sodium Silicate Substances 0.000 claims description 24
- 239000004111 Potassium silicate Substances 0.000 claims description 22
- 229910052913 potassium silicate Inorganic materials 0.000 claims description 22
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 claims description 16
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 16
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 16
- 239000011230 binding agent Substances 0.000 claims description 13
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 11
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 description 20
- 239000000377 silicon dioxide Substances 0.000 description 12
- 229910052681 coesite Inorganic materials 0.000 description 11
- 229910052906 cristobalite Inorganic materials 0.000 description 11
- 235000012239 silicon dioxide Nutrition 0.000 description 11
- 229910052682 stishovite Inorganic materials 0.000 description 11
- 229910052905 tridymite Inorganic materials 0.000 description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 9
- 235000019351 sodium silicates Nutrition 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 6
- 238000006731 degradation reaction Methods 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000001569 carbon dioxide Substances 0.000 description 4
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 101100298295 Drosophila melanogaster flfl gene Proteins 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 206010011224 Cough Diseases 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910001950 potassium oxide Inorganic materials 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/18—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents
- B22C1/186—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents contaming ammonium or metal silicates, silica sols
- B22C1/188—Alkali metal silicates
-
- 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
- C04B12/00—Cements not provided for in groups C04B7/00 - C04B11/00
- C04B12/04—Alkali metal or ammonium silicate cements ; Alkyl silicate cements; Silica sol cements; Soluble silicate cements
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/6303—Inorganic additives
- C04B35/6316—Binders based on silicon compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Detergent Compositions (AREA)
Description
7805139-'3 för bindning av partikelformade refraktormaterial i vilka binde- medlet är en lösning av kalium- och natríumsílikater varvid vikt- förhållandet SíO2:(K2O+Na20) är åtminstone 3:1 och viktförhållandet K2O:NazO är från 2:1 till 4:1. Blandningen av silikater och binde- medel kan härdas med användning av koldioxidgas. Det lägsta mol- förhållandet SiO2:K2O i detta sammanhang är 3,3:l och detta är en vanligt tillgänglig form av kaliumsilikat. For bonding particulate refractory materials in which the binder is a solution of potassium and sodium silicates wherein the weight ratio SiO 2: (K 2 O + Na 2 O) is at least 3: 1 and the weight ratio K 2 O: Na 2 O is from 2: 1 to 4 : 1. The mixture of silicates and binders can be cured using carbon dioxide gas. The lowest SiO2: K2O molar ratio in this context is 3.3: 1 and this is a commonly available form of potassium silicate.
Man har nu funnit att om man behöver speciellt snabba gasbe~ .handlíngstíder och om förbättrad kärnnedbrytning erfordras kan så- dana fördelar åstadkommas genom att man använder speciella kalium- silikater i bindemedlet med utvalda förhållanden kalíumoxid och kiseldíoxíd.It has now been found that if particularly fast gas treatment times are required and if improved nuclear decomposition is required, such benefits can be obtained by using special potassium silicates in the binder with selected conditions of potassium oxide and silica.
Följaktligen avser föreliggande uppfinning ett förfarande for framställning av gjutkärnor med användning av C0fi-silikatför- farandet varvid silikathindemedlet i förfarandet innefattar ett kaliumsilíkat med ett molförhållande Si0¿:K20 i storleïsordningen 1,6 till 2,211.Accordingly, the present invention relates to a process for producing casting cores using the CO 2 silicate process, wherein the silicate membrane agent in the process comprises a potassium silicate having a SiO 2: K 2 O molar ratio of the order of 1.6 to 2.211.
Det föredragna molförhâllandet Si02:K2O är i storleksord- ningen l,8 till 2,211. Kaliumsilikater i molförhållanden över 2,3 och med 50 viktprocent fasta beståndsdelar är alltför viskösa för att tillfredsställande kunna hanteras i gjutniljön.The preferred molar ratio SiO 2: K 2 O is in the order of 1.8 to 2.211. Potassium silicates in molar ratios above 2.3 and with 50% by weight solids are too viscous to be handled satisfactorily in the casting environment.
Man har även funnit att när signifikanta andelar natriumsi- líkater finns närvarande i silikatbindemedlet kan fortfarande en överraskande minskning i gasbehandlingstid erhållas. Be föredragna natríumsilíkaterna har ett molförhållande Si0Z:Aa3Ü i storleksord- ningen 1,65 till 2,S:l, helst 2 till 2,4.It has also been found that when significant proportions of sodium silicates are present in the silicate binder, a surprising reduction in gas treatment time can still be obtained. Preferred sodium silicates have a molar ratio of SiO 2: Aa 3 O in the order of 1.65 to 2.5: 1, most preferably 2 to 2.4.
Proportionen natriumsílikat i silikatbindemedlet bör inte överskrida 75 viktprocent om väsentliga förbättringar skall åstad- kommas.The proportion of sodium silicate in the silicate binder should not exceed 75% by weight if significant improvements are to be made.
Vid framställning av C02 silikatkärnor ger all reduktion i gasbehandlingstid dubbla fördelar. Först av allt innebär det att man ur vilken som helst utrustning kan erhålla en signifikant större produktion och för det andra innebär det en signifikant reduktion i mängden koldioxidgas som erfordras för att ge ett specifikt antal kärnor.In the production of CO2 silicate cores, any reduction in gas treatment time gives double benefits. First of all, it means that from any equipment one can obtain a significantly larger production and secondly, it means a significant reduction in the amount of carbon dioxide gas required to produce a specific number of cores.
Man har alltså funnit att effekten av nedhrytningsmedel, sasa saekarns, förbättras när silikatkompdncnten innefattar eller hostar 7805139-8 av kaliumsilikat såsom angivits ovan.Thus, it has been found that the effect of degrading agents, such as saekarns, is enhanced when the silicate component comprises or coughs potassium silicate as indicated above.
När man dessutom återanvänder den återvunna gjutsanden har användningen av kaliumsilikater en ytterligare fördel genom att kaliumsilíkaterna har en mindre skadlig effekt på refraktornaturen hos den återvunna sanden än de normalt använda natriumsilikaterna.In addition, when recycling the recycled casting sand, the use of potassium silicates has an additional advantage in that the potassium silicates have a less detrimental effect on the refractory nature of the recycled sand than the normally used sodium silicates.
Dessutom har man bland kaliumsilikaterna som användes enligt upp- finningen funnit att kaliumsilikaterna har lägre viskositet än de normalt använda natriumsilikaterna vilket underlättar lättheten att blanda silikat och sand.In addition, among the potassium silicates used according to the invention, it has been found that the potassium silicates have a lower viscosity than the normally used sodium silicates, which facilitates the ease of mixing silicate and sand.
Vid karakterisering av kärnor framställda med användning av C02 silikatförfarandet är det normalt att bestämma kärnans kom- pressionsstyrka omedelbart efter C02 gasbehandlingssteget liksom kompressionsstyrkan efter 24 timmar och 48 timmar under kontrollerade betingelser. Ett ytterligare test genomföres på kärnorna efter gjut- ningen för att bestämma nedbrytningskännetecknen hos den värmebe- handlade kärnan.When characterizing cores produced using the CO 2 silicate process, it is normal to determine the compression strength of the core immediately after the CO 2 gas treatment step as well as the compression strength after 24 hours and 48 hours under controlled conditions. An additional test is performed on the cores after casting to determine the degradation characteristics of the heat-treated core.
Nedbrytningstestet innefattar att man påför slagbelastning genom en fjäderbelastad kolv på kärnan för att bestämma de antal slag som erfordras för att intränga en centimeter i kärnan. Slagbe- lastningen påföres på ett prov med ett konískt huvud med 300 lutning som ger en belastning av upp till 31 kilo. Detta test och andra test som används i detta sammanhang beskrivs i detalj i boken "The C02- Silicate Process in Foundries", av K.E.L. Nicholas och som publice- ras av British Cast Iron Research Association, Alvechurch, Birmingham, 1972.The degradation test involves applying impact load through a spring-loaded piston to the core to determine the number of strokes required to penetrate one centimeter into the core. The impact load is applied to a sample with a conical head with a 300 slope that gives a load of up to 31 kilos. This test and other tests used in this context are described in detail in the book "The C02- Silicate Process in Foundries", by K.E.L. Nicholas and published by the British Cast Iron Research Association, Alvechurch, Birmingham, 1972.
Jämförande test gjordes med användning av ett standardnatrium- silikatbindemedel med ett 2,0 till 1 förhållande vid 45 procent fasta beståndsdelar tillsammans med olika kaliumsilikater. Kärnorna framställdes med användning av 3,5 procent, beräknat på vikten av den alkaliska silikatlösningen, blandad med en lämplig Chelfordsand.Comparative tests were performed using a standard sodium silicate binder with a 2.0 to 1 ratio at 45 percent solids along with various potassium silicates. The cores were prepared using 3.5 percent, based on the weight of the alkaline silicate solution, mixed with a suitable Chelford sand.
Cylindriska provbítar framställdes med 5,1 centimeters diameter och 5,1 centimeter höjd och dessa rammades på vanligt sätt och gas- behandlades med koldioxid vid flödeshastigheter av 2,5, 10 och 20 liter per minut vid 68,95 kilo-Newtons per kvadratmeter tryck. Pro- vens kompressionsstyrka bestämdes omedelbart efter gasbehandlíngen och efter 24 och 48 timmar. Provbitarna lagrades vid temperaturer av 20 ~ 27°C och relativa fuktigheter i storleksordningen S0 procent.Cylindrical test pieces were prepared with a diameter of 5.1 centimeters and a height of 5.1 centimeters and these were framed in the usual way and gas-treated with carbon dioxide at flow rates of 2.5, 10 and 20 liters per minute at 68.95 kilo-Newtons per square meter of pressure. . The compression strength of the samples was determined immediately after the gas treatment and after 24 and 48 hours. The specimens were stored at temperatures of 20 ~ 27 ° C and relative humidities in the order of S0 percent.
Kärnnedbrytningsegenskaperna bestämdes efter det att produkten inför- livats i gjutjärnsgods med en vikt av 25 kilo gjutet vid 140000. _...~_._...__,...-.__.. ...___ _.- _.- ...__.._, , 7805139-8 Resultaten av dessa försök angives i tabell I nedan.The core degradation properties were determined after the product was incorporated into cast iron castings weighing 25 kilograms cast at 140,000. _... ~ _._...__, ...-.__ .. ...___ _.- _ .- ...__.._,, 7805139-8 The results of these experiments are given in Table I below.
.De använda bíndemedlen angíves i tabell I med bokstäverna A - B och summansättningarna var på nedan angivet sätt: Bindemedel A är ett natriumsilikat med ett 2.0 till l för- hållande vid 45 procent fasta beståndsdelar.The binders used are given in Table I with the letters A - B and the sum compositions were as follows: Binder A is a sodium silicate with a ratio of 2.0 to 1 at 45 per cent solids.
Bíndemedel B är ett kalíumsilikat med ett 2,0 till l för- hållande vid 4S procent fasta beståndsdelar.Binder B is a potassium silicate with a 2.0 to 1 ratio at 4S percent solids.
Bindemedel C är ett kaliumsílíkat med ett 1,8 till l för- hållande vid 45 procent fasta beståndsdelar.Binder C is a potassium silicate with a ratio of 1.8 to 1 at 45 percent solids.
Bindemedel D är ett kaliumsilikat med ett 1,6 till l för- hållande vid 45 procent fasta beståndsdelar.Binder D is a potassium silicate with a ratio of 1.6 to 1 at 45 percent solids.
Bindemedel E är ett kalíumsilíkat med ett 2,2 till 1 för- hållande vid 53 procent fasta beståndsdelar.Binder E is a potassium silicate with a 2.2 to 1 ratio at 53 percent solids.
De lägre slagnedbrytníngssiffrorna inom parentes visar ef- fekten av tillsats av 20 procent, beräknat på vikten av blndemcdlet, sackaros. .-....-.._____...~ u..- fe .__ __..- ___., , 7805139~8 _ . _". SÅ Så. QR å .m Sá än.. 33 S3 mmm Nå 8 M ßfißfl ooww www mv ._ 3.3 Mot.. 3.3 S? .EQ än im 3 _. Sv, .wwmw 2% wQR NR 02 om mßmm wmom owøw mmww omam ammm Ncwfl mmm .www om W Nomfi Qwww moä mfi m. 33. 23 mïß Qom. Nä så 3 S äfif. oäw åK å M m.@fl ovow =&wm ßfiofl evo? mfio qflw GQ M .Gun womw oflo mä ßw@wwWm_..@vV wßfim OHQN mmom Qmmm maa maa Ofl W m.«fiV Å .HVV . «fl«w . - . wwmw womß Moa oß Om Nfmnfi v wåm ämm uwí. 3.1. *wo .Ãw om _" .mm wfi an.. ß _ _. ßfln. WH W mømv 1z;~ fixf OH m.N Q U n 4. u m o m < ...__ = p __ < u. ._ _.. ._ < Tvßï Ûscfz: Eu ñcofipmpwwcmm . »mEEHu mv hmEEmu em. wwfiwcmcwnmmw Eom wwflfl%flflwflp~.w~m.mflw.wfiwwuwwfifl< mcåcmvvflmfiwwvfluwwmfififiäu ANEEÉC mamuoëpwhwmšfi .Hmm mcmmmmwzfoñfivfiu mwawpmmcowmmmhmëom |mnmmm |w~ovfišfim gqmm<fl __....-._..._._._.. _. 7805139-8 ummfl . _ Hmom owm Oo Nwøfl mom: mßom mmom mwo omm oo mHom mmfim www må 003.. gå sån 2. oww wä å . 8,3 38 . 33 ma? NK SH om ïäw 32 .ovå . S3 wë åw om N02 ¶ mâw vä 3 _ Noßm oaßm owm OH om Q o m d. m n v < ._ _., < n.. ._ O m < Tvfiflfiwg fcpfiwwpmcon .SEEMQ f» æmëeflu Ä umfiwcmzønmmm Eom wmfifiwnmswwsmwwww: Eu H .Em Hmpfiwwwšv 1 :osmmm |mwwofim wcflcwxsnwmcmmflw fiNëšfiö Éwpwñumawmïfi .än mnopzmzloflfivfiv mxnxpwmcofiwmopnëox Nov ñ.mp»@wQ fl Aqmmdwe 7805139-8 Av tabell 1 framgår det att den omedelbara "Efter gasbehand- lingen" kompressionsstyrkan hos proven ästadkommes på en signifikant kortare tid med användning av kaliumsilíkat än det kommersiellt an- vända natríumsílikatet. Detta innebär att större produktionshastighet kan åstadkommas från en anläggning och signifikant mindre mängd ko1~ dioxid erfordras för vilket som helst antal kärnor.The lower decomposition figures in parentheses show the effect of the addition of 20 percent, calculated on the weight of the mixture, sucrose. .-....-.._____... ~ u ..- fe .__ __..- ___.,, 7805139 ~ 8 _. _ ". SÅ Så. QR å .m Sá än .. 33 S3 mmm Nå 8 M ß fi ß fl ooww www mv ._ 3.3 Mot .. 3.3 S? .EQ än im 3 _. Sv, .wwmw 2% wQR NR 02 om mßmm wmom owøw mmww omam ammm Ncw fl mmm .www om W Nom fi Qwww moä m fi m. 33. 23 mïß Qom. Nä så 3 S ä fi f. oäw åK å M m. @ fl ovow = & wm ß fi o fl evo? m fi o q fl w GQ M. womw o fl o mä ßw @ wwWm _ .. @ vV wß fi m OHQN mmom Qmmm maa maa O fl W m. «fi V Å .HVV.« fl «w. -. wwmw womß Moa oß Om Nfmn fi v wåmämm uwí. 3.1. * wo .Ãw om _ ".mm w fi an .. ß _ _. ß fl n. WH W mømv 1z; ~ fi xf OH m.N Q U n 4. u m o m <...__ = p __ <u. ._ _ .. ._ <Tvßï Ûscfz: Eu ñco fi pmpwwcmm. »MEEHu mv hmEEmu em. ww fi wcmcwnmmw Eom ww flfl% flfl w fl p ~ .w ~ m.m fl w.w fi wwuww fifl <mcåcmvv fl m fi wwv fl uwwm fififi äu ANEEÉC mamuoëpwhwmš fi .Hmm mcmmmmwzfomm m m m vm. . 7805139-8 umm fl. _ Hmom owm Oo Nwø fl mom: mßom mmom mwo omm oo mHom mm fi m www må 003 .. gå sån 2. oww wä å. 8.3 38. 33 ma? NK SH om ïäw 32 .ovå. S3 wë åw om N02 ¶ mâw vä 3 _ Noßm oaßm owm OH om Q om d. Mnv <._ _., <N .. ._ O m <Tv fiflfi wg fcp fi wwpmcon .SEEMQ f »æmëe fl u Ä um fi wcmzønmmm Eom wm fifi wnmsm. Em Hmp fi wwwšv 1: osmmm | mwwo f m toilet al cwxsnwmcmm al w fi NES access island Éwpwñumawmï fi .an mnopzmzlo flfi v f v mxnxpwmco fi wmopnëox November ñ.mp »@wQ al Aqmmdwe 7805139-8 table 1 shows that the immediate" After gasbehand- development "compression strength of the samples is achieved in a significantly shorter time with use of potassium silicate than the commercially used sodium silicate. This means that greater production rates can be achieved from a plant and significantly less carbon dioxide is required for any number of cores.
Styrkorna vid 24 och 48 timmar med användning av kaliumsilíkat uppnådde ofta inte de onödígtvis höga kompressionsstyrkorna som man ofta erhåller med användning av natriumsilikat. Denna faktor bidrar troligtvis till den bättre nedbrytning som âstadkommes med använd- ning av kaliumsilikaterl Slagstyrkan visar att nedbrytningen av kärnorna bundna med kaliumsilikat är något bättre än den hos standardnatriumsílikat. När nedbrytningshjälpmedel såsom socker införlivas i kaliumsilikatbinde~ medlen åstadkommes en till och med mera signifikant förbättring av egenskaperna.The concentrations at 24 and 48 hours using potassium silicate often did not reach the unnecessarily high compressive strengths often obtained using sodium silicate. This factor probably contributes to the better degradation achieved by the use of potassium silicates. The impact strength shows that the degradation of the cores bound with potassium silicate is slightly better than that of standard sodium silicate. When degradation aids such as sugar are incorporated into the potassium silicate binders, an even more significant improvement in properties is achieved.
Emellertid bör man inse att fastän kaliumsilikaterna enligt föreliggande ansökan ger en signifikant förbättring i gasbehandlings- tid är det dyrbarare än motsvarande natriumsilikater. En kommersiell balans kan ofta erhållas mellan den utomordentligt korta gasbehand- língstiden som erhålles med användning av endast kaliumsilikater vid högre kostnader och de signifikanta förbättringar som kan åstadkom- mas med användning av en blandning av kalium och natriumsilikater.However, it should be appreciated that although the potassium silicates of the present application provide a significant improvement in gas treatment time, they are more expensive than the corresponding sodium silicates. A commercial balance can often be obtained between the extremely short gas treatment time obtained using only potassium silicates at higher costs and the significant improvements that can be achieved using a mixture of potassium and sodium silicates.
Tabell II och III ger ytterligare detaljer om ytterligare testprover varvid man använder blandningar av kalium- och natriumsi- líkater. Gasbehandlingstiderna valdes för att åstadkomma jämförbara kompressionsstyrkor i försökskärnorna. Kärnorna lagrades vid 20°C och 60 procent relativ fuktighet.Tables II and III provide further details of additional test samples using mixtures of potassium and sodium silicates. The gas treatment times were chosen to provide comparable compression strengths in the test cores. The cores were stored at 20 ° C and 60 percent relative humidity.
Bindemedlen som användes i tabellerna [I och III var: Bindemedel F - kaliumsilikat 53 procent fasta beståndsdelar (Si02:K20 ~ 2,0:l molar) och 25 viktprocent natriumsilikat 46 procent fasta beståndsdelar (SiO2:Na20 - 2,0:l molar).The binders used in Tables [I and III were: Binder F - potassium silicate 53 percent solids (SiO 2: K 2 O> 2.0: 1 molar) and 25% by weight sodium silicate 46 percent solids (SiO 2: Na 2 O - 2.0: 1 molar ).
Bindemedel G - kaliumsilikat 53 procent fasta beståndsdelar (SíO2:K2O - 2,021 molar) och 50 víktprocent natriumsilikat 46 procent fasta beståndsdelar (Si02:Na20 - 2,0:l molar).Binder G - potassium silicate 53 per cent solids (SiO2: K2O - 2,021 molar) and 50% by weight sodium silicate 46 per cent solids (SiO2: Na2O - 2.0: 1 molar).
Bindemedel H - kaliumsilikat 53 procent fasta beståndsdelar (SiO2:K20 ~ 2,021 molar) och 75 viktprocent natriumsilikat 46 procent fasta beståndsdelar (SiOz:Na20 - 2,0:l molar).Binder H - potassium silicate 53 percent solids (SiO2: K20 ~ 2,021 molar) and 75% by weight sodium silicate 46 percent solids (SiO2: Na2O - 2.0: 1 molar).
Bindemedel J - 100 viktprocent natriumsilíkat 46 procent fasta beståndsdelar (SiOZ:Na2O - 2,021 molar). 7805139-8 s Bíndemedcl K - kaliumsílikat 53 procent fasta beståndsdelar -,_. ' fasta beståndsdelar (SiO2:Na2O - 2,0:l molar).Binder J - 100% by weight sodium silicate 46% solids (SiO 2: Na 2 O - 2,021 molar). 7805139-8 s Bíndemedcl K - potassium silicate 53 percent solids -, _. solids (SiO2: Na2O - 2.0: 1 molar).
Bíndemedel L - kalíumsilíkat 53 procent fasta beståndsdelar (Sí0Z:K20 - Z,2:1 molar) och 50 viktprocent natríumsílíkat 46 procent fasta beståndsdelar [Sí02:Na2O - 2,0:l molar).Binder L - potassium silicate 53% solids (SiO2: K2O - Z, 2: 1 molar) and 50% by weight sodium silicate 46% solids (SiO2: Na2O - 2.0: 1 molar).
Bindemedel M - kaliumsilikat 53 procent fasta beståndsdelar (Sí02:K20 - 7 ?'l molar) och 25 víktprocent natriumsílikat 46 procent (Sí02:K2O_- 2,211 molar) och 75 víktprocent natriumsílíkat 46 procent fasta beståndsdelar [SiO2:Na2O - 2,0:l molar). 1805139-8 mmom OOH »www ww wwfiw mv wmwfi Om norm Nß fiwmfl om wmww Om fifimm ON ...Hmm nw fimwv Om »www ß: 05mm NH .amEEfiH mfl. nvcfi cofl vmwm mw Nwflm mv mwva Om wmmm mn Hmvm Om momm Om Nwflm Om mmwv mw . . møßw. om Omflm aH owwm NH .ÉWEEÜP vw ÉHOH OOH mmofi wo fiHOH mzw .vmOH Ow mmm. NN. WC. om www cr. C:. ON må 3 mä Gm Sw E. m5.. 3 .UWMWMM 2 Tšzá TV7333 s w , _. . . . wvvffim wmøfiwnmc fimxßwwfi ...m/mæwm .fwxcwflmflwfiwflwm wfiïwfiï .Hæßñwwflflwwflwv Q I. M . I. a 4. u . , 0 . . . . _ wöfiwmm» sex flšwm mcoflmwmnmäom wnmmw wcoflwmwficaox Limma. wflofimmmnmfiox ficmconwww wfipmme pmswflummf OOÜO mÉ _ omwQm. mmumß mwwowmï w Éwwëmwcflm m Høwwaøwcfim w Huvoauwcfim m Hmnoëmwcfim oo HH Aqmm 7805139-8 mmmm N» Nmflw wm ßmwfl mm mwpw mw Wwmwm mm mmmw mfl »www om flmww wfi wwwm m.w Hßeaflp æ« momm .wfi oflfim. ww mbpfl . wfl omwm ,mfi ofimm .mm ~>Hw_ .mfi OHQN om Hwøm wfi FHWN _, m.w »msa«~ «~ wwofi N» »OCH vw fimofi . mm .Binder M - potassium silicate 53 percent solids (SiO2: K20 - 7? 'Molar) and 25% by weight sodium silicate 46 percent (SiO2: K2O_- 2,211 molar) and 75% by weight sodium silicate 46 percent solids [SiO2: Na2O - Na2O l molar). 1805139-8 mmom OOH »www ww ww fi w mv wmw fi Om norm Nß fi wm fl om wmww Om fifi mm ON ... Hmm nw fi mwv Om» www ß: 05mm NH .amEE fi H m fl. nvc fi co fl vmwm mw Nw fl m mv mwva About wmmm mn Hmvm About momm About Nw fl m About mmwv mw. . møßw. om Om fl m aH owwm NH .ÉWEEÜP vw ÉHOH OOH mmo fi wo fi HOH mzw .vmOH Ow mmm. NN. WC. about www cr. C :. ON må 3 mä Gm Sw E. m5 .. 3 .UWMWMM 2 Tšzá TV7333 s w, _. . . . wvvf. I. a 4. u. , 0. . . . _ wö fi wmm »sex fl šwm mco fl mwmnmäom wnmmw wco fl wmw fi caox Limma. w fl o fi mmmnm fi ox fi cmconwww w fi pmme pmsw fl ummf OOÜO mÉ _ omwQm. mmumß mwwowmï w Éwwëmwc fl m m Høwwaøwc fi m w Huvoauwc fi m m Hmnoëmwc fi m oo HH Aqmm 7805139-8 mmmm N »Nm fl w wm ßmw fl mm mwpw mw Wwmwm mm mmmw m fi m w w www« www. ww mbp fl. w fl omwm, m fi o fi mm .mm ~> Hw_ .m fi OHQN om Hwøm w fi FHWN _, m.w »msa« ~ «~ wwo fi N» »AND vw fi mo fi. mm.
CH» mfl Qwo mm ma É . wwflwcmc www om www wfi w w . -wnwww OH Û e\z¥v ñ.x@mu@fl~ h a\zMVfl.åwmvwfl» e\z¥V ñ.M@wv flpsafle mxnæum mwøfifiwcma . mxnzummwcfifiwflmc xnßpm flfipmwafifl han suwfifiv mdoflwmøamäoz fonmmw|wcoflmmo»mEoz |mnmæw.wnofiwmmsmæoxmmmmwnmmm .wfiwumøfi umnmfipmws mßNmN omuom m~"m> Qwwflwfiw E Hmfiuävwcfim A Høvøëøwflfim M Hmwufimwcflm ooCH »m fl Qwo mm ma É. ww fl wcmc www om www w fi w w. -wnwww OH Û e \ z ¥ v ñ.x @ mu @ fl ~ h a \ zMV fl. åwmvw fl »e \ z ¥ V ñ.M@wv fl psa fl e mxnæum mwø fifi wcma. mxnzummwc fifi w fl mc xnßpm flfi pmwa fifl han suw fifi v mdo fl wmøamäoz fonmmw | wco fl mmo »mEoz | mnmæw.wno fi wmmsmæoxmmmmwnmmm .w fi wumø fi umnm fi pmws mßNm w m m m N u mm ~> mm u ws mm ws ws mm
Claims (6)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB18454/77A GB1602122A (en) | 1977-05-03 | 1977-05-03 | Foundry binder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE7805139L SE7805139L (en) | 1978-11-04 |
| SE438456B true SE438456B (en) | 1985-04-22 |
Family
ID=10112722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7805139A SE438456B (en) | 1977-05-03 | 1978-05-03 | PROCEDURE FOR PREPARING CAST CORNES USING A CO? 712 SILICATE PROCEDURE AND Aqueous SILICATE BINDING SOLUTION |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS53144421A (en) |
| AU (1) | AU521140B2 (en) |
| BE (1) | BE866580A (en) |
| BR (1) | BR7802687A (en) |
| CA (1) | CA1109896A (en) |
| DE (1) | DE2819456A1 (en) |
| ES (1) | ES469437A1 (en) |
| FR (1) | FR2389432B1 (en) |
| GB (1) | GB1602122A (en) |
| IT (1) | IT1147755B (en) |
| NL (1) | NL7804734A (en) |
| SE (1) | SE438456B (en) |
| ZA (1) | ZA782513B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0148280B1 (en) * | 1982-12-16 | 1987-09-09 | Hüls Troisdorf Aktiengesellschaft | Water-containing hardenable shaped masses based on inorganic components, and method of producing shaped bodies |
| DE19951622A1 (en) | 1999-10-26 | 2001-05-23 | Vaw Ver Aluminium Werke Ag | Binder system based on water glass |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2829060A (en) * | 1954-10-25 | 1958-04-01 | Rolls Royce | Mould and method of making the same |
| GB874117A (en) * | 1959-06-19 | 1961-08-02 | Unilever Ltd | Processes for binding particulate solid materials and binders for use in such processes |
| US3442665A (en) * | 1966-06-13 | 1969-05-06 | Mueller Arno | Process for preparing sand cores using co2 cured silicate binders |
| JPS5224122A (en) * | 1975-08-20 | 1977-02-23 | Kato Asamichi | Method of making mold of good disintegrating property |
| JPS52124418A (en) * | 1976-04-14 | 1977-10-19 | Kato Tomomichi | Mold manufacturing |
-
1977
- 1977-05-03 GB GB18454/77A patent/GB1602122A/en not_active Expired
-
1978
- 1978-04-28 BE BE187288A patent/BE866580A/en not_active IP Right Cessation
- 1978-04-28 BR BR7802687A patent/BR7802687A/en unknown
- 1978-05-02 AU AU35668/78A patent/AU521140B2/en not_active Expired
- 1978-05-02 ZA ZA00782513A patent/ZA782513B/en unknown
- 1978-05-02 CA CA302,458A patent/CA1109896A/en not_active Expired
- 1978-05-02 JP JP5324978A patent/JPS53144421A/en active Pending
- 1978-05-02 FR FR7812978A patent/FR2389432B1/fr not_active Expired
- 1978-05-02 IT IT68005/78A patent/IT1147755B/en active
- 1978-05-03 DE DE19782819456 patent/DE2819456A1/en not_active Withdrawn
- 1978-05-03 NL NL7804734A patent/NL7804734A/en not_active Application Discontinuation
- 1978-05-03 ES ES469437A patent/ES469437A1/en not_active Expired
- 1978-05-03 SE SE7805139A patent/SE438456B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| BR7802687A (en) | 1978-12-19 |
| ES469437A1 (en) | 1979-10-01 |
| GB1602122A (en) | 1981-11-04 |
| SE7805139L (en) | 1978-11-04 |
| AU521140B2 (en) | 1982-03-18 |
| IT1147755B (en) | 1986-11-26 |
| ZA782513B (en) | 1979-12-27 |
| NL7804734A (en) | 1978-11-07 |
| CA1109896A (en) | 1981-09-29 |
| BE866580A (en) | 1978-10-30 |
| FR2389432B1 (en) | 1982-11-05 |
| FR2389432A1 (en) | 1978-12-01 |
| AU3566878A (en) | 1979-11-08 |
| DE2819456A1 (en) | 1978-11-09 |
| JPS53144421A (en) | 1978-12-15 |
| IT7868005A0 (en) | 1978-05-02 |
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