SE529710C2 - Molding material, use of molding material and molding process - Google Patents
Molding material, use of molding material and molding processInfo
- Publication number
- SE529710C2 SE529710C2 SE0502882A SE0502882A SE529710C2 SE 529710 C2 SE529710 C2 SE 529710C2 SE 0502882 A SE0502882 A SE 0502882A SE 0502882 A SE0502882 A SE 0502882A SE 529710 C2 SE529710 C2 SE 529710C2
- Authority
- SE
- Sweden
- Prior art keywords
- weight
- equal
- molding composition
- carbonaceous material
- less
- Prior art date
Links
- 238000000465 moulding Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 7
- 239000012778 molding material Substances 0.000 title 2
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 48
- 239000003245 coal Substances 0.000 claims abstract description 37
- 239000000571 coke Substances 0.000 claims abstract description 32
- 238000005266 casting Methods 0.000 claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000004576 sand Substances 0.000 claims abstract description 15
- 229910052742 iron Inorganic materials 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims description 52
- 150000001875 compounds Chemical class 0.000 claims description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- 239000010439 graphite Substances 0.000 claims description 10
- 229910002804 graphite Inorganic materials 0.000 claims description 10
- 239000004071 soot Substances 0.000 claims description 6
- 239000000470 constituent Substances 0.000 claims description 5
- 239000000440 bentonite Substances 0.000 claims description 4
- 229910000278 bentonite Inorganic materials 0.000 claims description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 235000015250 liver sausages Nutrition 0.000 claims 1
- XYSQXZCMOLNHOI-UHFFFAOYSA-N s-[2-[[4-(acetylsulfamoyl)phenyl]carbamoyl]phenyl] 5-pyridin-1-ium-1-ylpentanethioate;bromide Chemical compound [Br-].C1=CC(S(=O)(=O)NC(=O)C)=CC=C1NC(=O)C1=CC=CC=C1SC(=O)CCCC[N+]1=CC=CC=C1 XYSQXZCMOLNHOI-UHFFFAOYSA-N 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 4
- 239000000654 additive Substances 0.000 abstract description 2
- 230000000996 additive effect Effects 0.000 abstract 1
- 239000000523 sample Substances 0.000 description 19
- 239000000843 powder Substances 0.000 description 10
- 239000012855 volatile organic compound Substances 0.000 description 8
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 4
- 239000003830 anthracite Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 239000003110 molding sand Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 241001333909 Soter Species 0.000 description 2
- 239000003077 lignite Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- CUOMGDPDITUMIJ-HZZBMVKVSA-N Ala-Phe-Thr-Ser Chemical compound OC[C@@H](C(O)=O)NC(=O)[C@H]([C@H](O)C)NC(=O)[C@@H](NC(=O)[C@H](C)N)CC1=CC=CC=C1 CUOMGDPDITUMIJ-HZZBMVKVSA-N 0.000 description 1
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 101001135021 Homo sapiens Prostate and testis expressed protein 1 Proteins 0.000 description 1
- 102100033514 Prostate and testis expressed protein 1 Human genes 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 229910000281 calcium bentonite Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000013074 reference sample Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
- B22C1/14—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives for separating the pattern from the mould
-
- 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
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
Description
20 25 30 529 710 2 visas ett gjutförfarande där antracit, metallurgisk koks och brunkol tillsätts till en blandning av kolhaltigt material, vars huvudbeståndsdel är stenkol. 529 710 2 shows a casting process in which anthracite, metallurgical coke and lignite are added to a mixture of carbonaceous material, the main constituent of which is hard coal.
I LaFay, Neltner, Taulbee, Wellbruck, Ashburn: Applying Emission Characteristics of Seacoal and Seacoal Supplements for the Foundry Industry, AFTS Transactions, 99-23, sid 7-10,visas gjutförfaranden, där kolhaltigt material innehållande omkring hälften stenkol och hälften naturasfalt (Gilsonite) respektive omkring hälften stenkol och hälften antracit.In LaFay, Neltner, Taulbee, Wellbruck, Ashburn: Applying Emission Characteristics of Seacoal and Seacoal Supplements for the Foundry Industry, AFTS Transactions, 99-23, pages 7-10, casting processes are shown, where carbonaceous material containing about half coal and half natural asphalt ( Gilsonite) and about half coal and half anthracite, respectively.
I LaFay, Neltner, Taulbee, Wellbrock, Ashburn: Evaluating Benzene Emissions During Casting of Aluminum 99-01, sid 745-750, gjutförfarande där 2% stenkol tillsätts till formmassan. and Iron, AFS Transactions, Visas êtt I LaFay, Neltner, Taulbee, Wellbrock: Evaluating Emission Characteristics of Seacoal and Seacoal Supplements Using Advanced Analytical Techniques, AFS 00-46, sid 713-718, förfarande där 2% kolhaltigt material tillsätts till Transactions, visas ett gjut- formmassan och där det kolhaltiga materialet består till ca 67% antracit och 22% stenkol.In LaFay, Neltner, Taulbee, Wellbrock, Ashburn: Evaluating Benzene Emissions During Casting of Aluminum 99-01, pages 745-750, casting process where 2% coal is added to the molding compound. and Iron, AFS Transactions, Referred to in LaFay, Neltner, Taulbee, Wellbrock: Evaluating Emission Characteristics of Seacoal and Seacoal Supplements Using Advanced Analytical Techniques, AFS 00-46, pages 713-718, Procedure where 2% Carbonaceous Material is Added to Transactions, shows a molding compound and where the carbonaceous material consists of about 67% anthracite and 22% coal.
Neltner: Green Sand Without Seacoal, AFS 04-111, I LaFay, Transactions, sid 671-681, visas gjutförfaranden där cellulosa, antracit och brunkol utvärderas som ersättning till stenkol, och där det konstateras att sämre gjutprestanda (vidhäftning av sand) erhålls om man helt ersätter stenkolen.Neltner: Green Sand Without Seacoal, AFS 04-111, In LaFay, Transactions, pages 671-681, casting processes are shown in which cellulose, anthracite and lignite are evaluated as a replacement for hard coal, and where it is found that poorer casting performance (sand adhesion) is obtained if you completely replace the coal.
I Moore, Brown: Coal in Greensand Systems - A new look at a very old practice, Foundry Trade Journal, Juni 2005, visas inblandning av 3-5% koks i formmassan.In Moore, Brown: Coal in Greensand Systems - A new look at a very old practice, Foundry Trade Journal, June 2005, a mixture of 3-5% coke in the molding compound is shown.
Det finns således ett behov av en förbättrad formmassa och ett förbättrat gjutförfarande, vilka kombinerar låga utsläpp av flyktiga organiska föreningar 2 V:\__Noí>rganisation\SVENSKA GJUTERIFÖRENINGEEIS SE I ïl022586\Ändrad ansökan svaromål 2006-10-Oê\2 “ "-1- ructor RWD 2006-10-04.doc ApplicationtextToInst 10 15 20 25 30 529 710 3 med reducerad vidhäftning av sand på det gjutna föremålet.There is thus a need for an improved molding compound and an improved casting process, which combine low emissions of volatile organic compounds. 2 V: - ructor RWD 2006-10-04.doc ApplicationtextToInst 10 15 20 25 30 529 710 3 with reduced adhesion of sand to the cast object.
Sammanfattning av uppfinningen Ett ändamål är att åstadkomma en formmassa och ett gjutförfarande som helt eller delvis eliminerar problemen med känd teknik. Ett specifikt ändamål är att åstadkomma en formmassa och ett gjutförfarande som reducerar utsläpp av flyktiga organiska föreningar, i kombination med låg vidhäftning av sand på det gjutna föremålet.SUMMARY OF THE INVENTION An object is to provide a molding composition and a casting process which completely or partially eliminates the problems of the prior art. A specific object is to provide a molding compound and a casting process which reduces emissions of volatile organic compounds, in combination with low adhesion of sand to the cast article.
Uppfinningen definieras av de bifogade självständiga patentkraven. Utföringsformer framgår av de osjälv- ständiga patentkraven samt av den bifogade beskrivningen.The invention is defined by the appended independent claims. Embodiments appear from the dependent claims and from the attached description.
Således åstadkoms en formmassa för gjutning av järn, vilken formmassa innehåller sand och kolhaltigt material, varvid det kolhaltiga materialet utgör 0,5-10 vikt-% av formmassan och innehåller stenkol. Det kolhaltiga materialet innehåller, relativt var och en av de i det kolhaltiga materialet ingående beståndsdelarna, till största delen i vikt koks.Thus, a molding compound is provided for casting iron, which molding compound contains sand and carbonaceous material, the carbonaceous material constituting 0.5-10% by weight of the molding compound and containing coal. The carbonaceous material contains, relative to each of the constituents of the carbonaceous material, mostly by weight coke.
En sådan formmassa kan göras acceptabel med avseende på såväl emissioner som med avseende på vidhäftning av formmassa på det gjutna föremålet.Such a molding compound can be made acceptable with regard to both emissions and with regard to the adhesion of molding compound to the cast object.
Enligt utföringsformer kan mer än 40 vikt-%, företrädesvis mer än 50 vikt-%, av det kolhaltiga materialet vara koks. Den nedre gränsen för mängden koks är inte kritisk för formsandens prestanda ur vidhäft- ningssynvinkel, utan kan väljas utgående från vilken utsläppsmängd som anses vara godtagbar.According to embodiments, more than 40% by weight, preferably more than 50% by weight, of the carbonaceous material may be coke. The lower limit for the amount of coke is not critical to the performance of the molding sand from an adhesion point of view, but can be selected based on the amount of emissions that is considered acceptable.
Enligt ytterligare utföringsformer kan mer än eller lika med 60 vikt-%, företrädesvis mer än eller lika med 70 vikt-%, av det kolhaltiga materialet vara koks.According to further embodiments, more than or equal to 60% by weight, preferably more than or equal to 70% by weight, of the carbonaceous material may be coke.
Enligt ytterligare utföringsformer kan mindre än eller lika med 99 vikt-%, företrädesvis mindre än eller Zfliïê-lfi-Ûš 13:42 V1\_NOOrg¿xniSatiOrÛSVENSKÄ GJUTšRlfÖREllïNGElššïå SERYFIILIE".According to further embodiments, less than or equal to 99% by weight, preferably less than or Zfliïê-l fi- Ûš 13:42 V1 \ _NOOrg¿xniSatiOrÛSVENSKÄ GJUTšRlfÖREllïNGElššïå SERYFIILIE ".
AB\PATE1~íT\~bJoFaxnily\SE\2lO22586\Ändrad ansökan svaroxnål 20O6-l0-O2M2l022586 AppiicatontextToInstructor BWD 2006-10-O4.doc lO 15 20 25 30 529 710 4 lika med 95 vikt-%, mindre än eller lika med 90 vikt-%, mindre än eller lika med 80 vikt-%, mindre än eller lika med 75 vikt-% eller mindre än eller lika med 70 vikt-% av det kolhaltiga materialet vara koks.AB \ PATE1 ~ íT \ ~ bJoFaxnily \ SE \ 2lO22586 \ Modified application svaroxnål 20O6-l0-O2M2l022586 AppiicatontextToInstructor BWD 2006-10-O4.doc lO 15 20 25 30 529 710 4 equal to 95% by weight, less than or equal to 90% by weight, less than or equal to 80% by weight, less than or equal to 75% by weight or less than or equal to 70% by weight of the carbonaceous material being coke.
Enligt ytterligare utföringsformer kan den resterande delen av det kolhaltiga materialet vara stenkol, eller stenkol och sotersättningsmedel.According to further embodiments, the remaining part of the carbonaceous material may be coal, or coal and soot substitutes.
Enligt utföringsformer kan mindre än eller lika med 30 vikt-%, företrädesvis mindre än eller lika med 20 vikt-%, mindre än eller lika med 15 vikt-% eller mindre än eller lika med 10 vikt-% av det kolhaltiga materialet vara stenkol, eller stenkol och sotersättningsmedel.According to embodiments, less than or equal to 30% by weight, preferably less than or equal to 20% by weight, less than or equal to 15% by weight or less than or equal to 10% by weight of the carbonaceous material may be coal. or coal and soot substitutes.
Enligt ytterligare utföringsformer, kan formmassan innehålla mindre än eller lika med 25 vikt-%, företrädesvis mindre än eller lika med 6 vikt%, mindre än eller lika med 4 vikt-% eller mindre än eller lika med 2,5 vikt-% kolhaltigt material.According to further embodiments, the molding composition may contain less than or equal to 25% by weight, preferably less than or equal to 6% by weight, less than or equal to 4% by weight or less than or equal to 2.5% by weight of carbonaceous material. .
Enligt ytterligare utföringsformer, kan formmassan innehålla mer än eller lika med 0,5 vikt-%, mer än eller lika med l vikt-%, mer än eller lika med 1,5 vikt-%, mer än eller lika med 2 vikt-%, mer än eller lika med 2,5 vikt-%, mer än eller lika med 3 vikt-%, mer än eller lika med 3,5 vikt-%, mer än eller lika med 4 vikt-% eller mer än eller lika med 4,5 vikt-% kolhaltigt material.According to further embodiments, the molding composition may contain more than or equal to 0.5% by weight, more than or equal to 1% by weight, more than or equal to 1.5% by weight, more than or equal to 2% by weight. , more than or equal to 2,5% by weight, more than or equal to 3% by weight, more than or equal to 3,5% by weight, more than or equal to 4% by weight or more than or equal to 4.5% by weight of carbonaceous material.
Enligt ytterligare utföringsformer kan formmassan innehålla bindemedel, exempelvis omkring 4-15 vikt-%, företrädesvis 5-ll vikt-%, bindemedel. Bindemedlet kan vara bentonit.According to further embodiments, the molding composition may contain adhesive, for example about 4-15% by weight, preferably 5-11% by weight, of adhesive. The binder may be bentonite.
Enligt ytterligare utföringsformer, kan formmassan innehålla grafit, företrädesvis i en mängd uppgående till omkring 0,5 till 2 vikt-% av formmassan. Tillsats av grafit medför att formmassan flyter bättre och därmed blir lättare att hantera. 2006-10-C5 13:42 V:\_NoOrganisati0n\SVENSKA GJUTERIFÖRENINGEHS SERVICE AB\PATENT\V_t§o:'arnily\SE\2l022586\Ändrad ansökan svaromàï, 2006~'L0-04\2ïf3~22586 ApplicationtextToInstructor RWD 2006-l0~Ü4.doc 10 15 20 25 30 529 710 5 Enligt en andra aspekt åstadkommes användning av en ovan beskriven formmassa för gjutning av järnföremål.According to further embodiments, the molding composition may contain graphite, preferably in an amount of about 0.5 to 2% by weight of the molding composition. Addition of graphite means that the molding compound flows better and thus becomes easier to handle. 2006-10-C5 13:42 V: \ _ NoOrganisati0n \ SVENSKA GJUTERIFÖRENINGEHS SERVICE AB \ PATENT \ V_t§o: 'arnily \ SE \ 2l022586 \ Ändrad ansökan svaromàï, 2006 ~' L0-04 \ 2ïf3 ~ 22586 lWextToIn According to a second aspect, use is made of a molding compound described above for casting iron objects.
Enligt en tredje aspekt, åstadkommes ett förfarande för för gjutning av järn i en formmassa innehållande sand och kolhaltigt material, utgörande 0,5-10 vikt-% av formmassan och innefattande stenkol. Förfarandet innefattar inblandning av koks i formmassa, så att det kolhaltiga materialets största beståndsdel i vikt, relativt var och en av de i det kolhaltiga materialet ingående beståndsdelarna, är koks.According to a third aspect, there is provided a process for casting iron in a molding composition containing sand and carbonaceous material, constituting 0.5-10% by weight of the molding composition and comprising coal. The process involves mixing coke into the molding compound so that the largest component by weight of the carbonaceous material, relative to each of the constituents contained in the carbonaceous material, is coke.
Beskrivning av utföringsformer Försök gjordes med gjutning av bromsskivor av gråjärn med en vikt på ca 6,2 kg. En grundblandning för formmassa, bestående av syntetisk formsand, blandad av jungfruligt material, iordningställdes, varvid kvarts- fältspatsand blandades med 5 vikt-% sodabehandlad kalciumbentonit och vatten, samt därefter förvarades i en månad. Till grundblandningen av formsand gjordes tillsatser enligt följande: I ett första prov, ”Prov 1", bereddes en formmassa bestående av grundblandning och 4 vikt-% koks. Det kolhaltiga materialet i denna formmassa utgjordes därmed av 100 vikt-% koks.Description of embodiments Experiments were made with casting of gray iron brake discs with a weight of about 6.2 kg. A basic mixture for molding compound, consisting of synthetic molding sand, mixed with virgin material, was prepared, whereby quartz feldspar sand was mixed with 5% by weight of soda-treated calcium bentonite and water, and then stored for one month. To the basic mixture of molding sand, additives were made as follows: In a first sample, "Sample 1", a molding compound consisting of a basic mixture and 4% by weight of coke was prepared.
I ett andra prov, ”Prov 2", bereddes en formmassa bestående av grundblandning, 3 vikt-% koks och 1 vikt-% grafit. Det kolhaltiga materialet i denna formmassa utgjordes därmed av 75 vikt-% koks or 25 vikt-% grafit.In a second sample, "Sample 2", a molding composition consisting of a basic mixture, 3% by weight of coke and 1% by weight of graphite was prepared. The carbonaceous material in this molding composition thus consisted of 75% by weight of coke or 25% by weight of graphite.
I ett tredje prov, ”Prov 3", bereddes en formmassa bestående av grundblandning och 4 vikt-% stenkolspulver.In a third sample, "Sample 3", a molding composition consisting of a basic mixture and 4% by weight of coal powder was prepared.
Det kolhaltiga materialet i denna formmassa utgjordes därmed av 100 vikt~% stenkolspulver. användes en I ett fjärde prov, ”Prov 4", kommersiellt utnyttjad cirkulerande, dvs återanvänd, 2CO6-10-05 13:42 V:\_NoOrganisatiOn\SVENSKA GJUTERIFÖRENÉNGENS SERVICE A5“PATENT\_NoFaraily\SE\2lS22586\Ä.ndrad ansökan sxfaromàl 2006~lO-04\2lO22586 ApplicatLontextToInstructo: RWD ZCOE-lCE-Oßhdoc lO 15 20 25 30 529 710 6 formmassa, med en uppmätt kolhalt på ca 4,5 vikt-% Det tillsatta kolhaltiga materialet i denna formmassa utgjordes av stenkolspulver och sotersättningsmedel.The carbonaceous material in this molding composition thus consisted of 100% by weight of coal powder. was used a In a fourth test, "Sample 4", commercially used circulating, ie reused, 2CO6-10-05 13:42 V: \ _ NoOrganisatiOn \ SVENSKA GJUTERIFÖRENÉNGENS SERVICE A5 2006 ~ lO-04 \ 211022586 ApplicatLontextToInstructo: RWD ZCOE-lCE-Oßhdoc lO 15 20 25 30 529 710 6 molding compound, with a measured carbon content of approx.
Dessutom innehåller denna formmassa, till följd av cirkulationen, en liten mängd koks, vilken bildas i samband med att formmassan upphettas vid gjutning och stenkolspulver och sotersättningsmedel omvandlas till koks. Dessutom innehåller denna formmassa kolhaltiga rester från polymerhaltiga bindemedel som används vid tillverkning av gjutkärnor.In addition, as a result of the circulation, this molding compound contains a small amount of coke, which is formed in connection with the molding compound being heated during casting and coal powder and soot substitutes are converted into coke. In addition, this molding composition contains carbonaceous residues from polymer-containing binders used in the manufacture of casting cores.
I ett femte prov, ”Prov 5", bereddes en formsand innehållande grundblandning samt 4 vikt-% koks och 1,5 vikt-% stenkolspulver. Det kolhaltiga materialet i denna formmassa utgjordes därmed av 73 vikt-% koks och 27 vikt% stenkolspulver.In a fifth sample, "Sample 5", a molding sand containing basic mixture and 4% by weight of coke and 1.5% by weight of coal powder were prepared. The carbonaceous material in this molding composition thus consisted of 73% by weight of coke and 27% by weight of coal powder.
I ett sjätte prov, ”Prov 6", utgicks från formmassan i Prov 2, varvid 0,5 vikt-% stenkolspulver tillsattes.In a sixth sample, "Sample 6", starting from the molding composition in Sample 2, 0.5% by weight of hard coal powder was added.
Det kolhaltiga materialet i denna formmassa utgjordes därmed av ca 67 vikt-% koks, 22 vikt-% grafit och ll vikt-% stenkolspulver.The carbonaceous material in this molding composition thus consisted of about 67% by weight of coke, 22% by weight of graphite and 11% by weight of hard coal powder.
I ett sjunde prov, ”Prov 7” utgicks från formmassan i Prov 2, varvid grundblandning tillsattes, så att den totala mängden koks blev 1,5 vikt-% och den totala mängden grafit blev 0,5 vikt-%. Vidare tillsattes 0,5 vikt-% stenkolspulver. Det kolhaltiga materialet i denna formmassa utgjordes därmed av 60 vikt-% koks, 20 vikt-% grafit och 20 vikt-% stenkolspulver.In a seventh sample, "Sample 7" was based on the molding compound in Sample 2, whereby a basic mixture was added, so that the total amount of coke became 1.5% by weight and the total amount of graphite became 0.5% by weight. Further, 0.5% by weight of coal powder was added. The carbonaceous material in this molding composition thus consisted of 60% by weight of coke, 20% by weight of graphite and 20% by weight of hard coal powder.
I ett åttonde prov, ”Prov 8” utnyttjades formmassa enligt EU-projektet GO-APIC (projektnummer GlRD-CT-2000- 00235). Det kolhaltiga materialet i denna formmassa bestod av en grafit-zeolitblandning, och innehöll därmed inget koks. 7.006~lO-O5 131112 V:\_I*IoCrganiSatiOrÅSY/ENSKA GJUTERIFÖRENINGENS SERVICE AB“==PATENT“\__NoE'amily\SE\2l022586\Ändrad ansökan svaromàl 2006-l0-04\21022586 Applicationtextïoïnstrxzctor RVID ZODS-lfö-Ofhdoc 10 15 20 529 710 7 Efter gjutning, tilläts det gjutna föremålet att svalna under 40 minuter i formen, varefter den ena formdelen lyftes av och ställdes på högkant på den andra formdelen under 20 minuter, så att från formdelarna avgivna flyktiga organiska föreningar kunde samlas upp av utsugshuven och mätas i utsugskanalen.In an eighth test, “Sample 8”, molding compound was used according to the EU project GO-APIC (project number GlRD-CT-2000- 00235). The carbonaceous material in this molding composition consisted of a graphite-zeolite mixture, and thus contained no coke. 7.006 ~ lO-O5 131112 V: \ _ I * IoCrganiSatiOrÅSY / ENSKA GJUTERIFÖRENINGENS SERVICE AB "== PATENT“ \ __ NoE'amily \ SE \ 2l022586 \ Ändrad ansökan svaromàl 2006-l0-04 \ 210o25strS Application After molding, the molded article was allowed to cool for 40 minutes in the mold, after which one mold part was lifted off and placed on a high edge on the other mold part for 20 minutes, so that volatile organic compounds emitted from the mold parts could be collected by the extraction hood. and measured in the extraction duct.
Efter totalt en timme, slogs det gjutna föremålet ur formarna och vibrerades på en avslagare under en minut, varefter de fick svalna helt. När de gjutna föremålen nått rumstemperatur, vibrerades de ytterligare en minut på avslagaren, varefter de blästrades. Vägning av de gjutna föremålen gjordes efter den första minuten på urslagaren.After a total of one hour, the cast article was knocked out of the molds and vibrated on a beater for one minute, after which they were allowed to cool completely. When the cast objects reached room temperature, they were vibrated for another minute on the cutter, after which they were blasted. Weighing of the cast objects was done after the first minute on the knockout.
För Prov 1-4 gjordes mätning av flyktiga organiska föreningar med hjälp av en utsugshuv försedd med FID- instrument, som mäter halten av flyktiga organiska föreningar i utsugskanalen. Vidare mättes sandmängden efter den första urslagningen.For Samples 1-4, volatile organic compounds were measured using an extraction hood equipped with FID instruments, which measure the content of volatile organic compounds in the extraction duct. Furthermore, the amount of sand was measured after the first precipitation.
För prov 8 mättes endast sandmängden efter den första urslagningen. Av Tabell 1 framgår resultaten av mätningarna för Prov 1-4.For sample 8, only the amount of sand was measured after the first elimination. Table 1 shows the results of the measurements for Samples 1-4.
Tabell 1: Resultat av Prov 1-4 Prov 1 2 3 4 Bentonit [vikt-%] 5,1 5,1 5,1 6,5 Koks [vikt-%] 4 3 O -* Stenkol/ [vikt-%] 0 0 4 -* Soters.Table 1: Results of Samples 1-4 Samples 1 2 3 4 Bentonite [wt%] 5.1 5.1 5.1 6.5 Coke [wt%] 4 3 O - * Coal / [wt%] 0 0 4 - * Soters.
Grafit [vikt-%] O 1 0 -* Kolhalt [vikt-%] 3,2 2,9 3,0 4,5 VOC max [ppm] 0,05 0,01 24 19 Sandmängd [vikt-%] 8,5 6,2 1,7 2,2 2QlUfs-lÜtÜš ÄÉZQZ V:\__NOOrgaI1iSâtiOI1\SVENSKÄ GJUTERIFÖREPÉINGETÅS SERVICE A3\PATENT\_NoFaInily\SE\2102258filxÄndrad ansökan svaromàl 2006-l0-04\2i02258íš ApplicationtextToïnstructor REM: ZGOE-IG-Ckdoc 10 15 20 529 710 8 * Uppgift om halt saknas, eftersom provet var ett referensprov med återanvänd formmassa.Graphite [wt%] 0 1 0 - * Carbon content [wt%] 3.2 2.9 3.0 4.5 VOC max [ppm] 0.05 0.01 24 19 Sand quantity [wt%] 8, 5 6,2 1,7 2,2 2QlUfs-lÜtÜš ÄÉZQZ V: \ __ NOOrgaI1iSâtiOI1 \ SVENSKÄ GJUTERIFÖREPÉINGETÅS SERVICE A3 \ PATENT \ _NoFaInily \ SE \ 2102258 fi lxÄndrad ansöki 200202258 2006 20 529 710 8 * Information on content is missing, as the sample was a reference sample with recycled molding compound.
Av Tabell l framgår att formmassa utan inblandning av stenkol ger oacceptabelt hög mängd vidhäftad formmassa. Prov 1 och 2 är således oacceptabla ur produktivitetssynvinkel, eftersom alltför stor mängd vidhäftad sand erhålls.Table 1 shows that molding compound without admixture of hard coal gives an unacceptably high amount of adhered molding compound. Samples 1 and 2 are thus unacceptable from a productivity point of view, as too much adhered sand is obtained.
Vidare framgår av Tabell l att formmassa där stenkol utgör en låg andel av det kolhaltiga materialet ger låga utsläpp av flyktiga organiska föreningar. Prov 3 och 4 är således oacceptabla ur emissionssynpunkt.Furthermore, Table 1 shows that molding compound where coal constitutes a low proportion of the carbonaceous material gives low emissions of volatile organic compounds. Samples 3 and 4 are thus unacceptable from an emission point of view.
Av Tabell 2 framgår resultaten av mätningarna för Prov 5-8.Table 2 shows the results of the measurements for Samples 5-8.
Tabell 2: Resultat av Prov 5-8 Prov 5 6 7 8 Bentonit [vikt-%] 5,1 5,1 5,1 ca 6,8 Koks [vikt-%] 4 3 1,5 O Stenkol/ [vikt-%] 1,5 0,5 0,5 0 soters.Table 2: Results of Samples 5-8 Samples 5 6 7 8 Bentonite [wt.%] 5.1 5.1 5.1 approx. 6.8 Coke [wt.%] 4 3 1.5 O Coal / [wt. %] 1.5 0.5 0.5 0 soters.
Grafit [vikt-%] 0 1 0,5 < 2,0 Kolhalt [vikt-%] 4,1 3,2 1,9 < 1,0 Sandmängd [vikt~%] 1,3 3,0 6,6 6,0 Av Tabell 2 framgår att en formmassa, där det kolhaltiga materialets största beståndsdel är koks, med inblandning av stenkol, ger acceptabel mängd vidhäftad formmassa.Graphite [wt%] 0 1 0.5 <2.0 Carbon content [wt%] 4.1 3.2 1.9 <1.0 Sand content [wt ~%] 1.3 3.0 6.6 6 Table 2 shows that a molding compound, in which the largest component of the carbonaceous material is coke, with a mixture of coal, gives an acceptable amount of adhered molding compound.
Eftersom emissionerna av flyktiga organiska föreningar är direkt proportionella mot mängden stenkolspulver/sotersättningsmedel, konstateras att Prov 5-7 torde vara acceptabla även ur emissionssynvinkel. 2006-10-05 13:42 V:\__N<>OrganiSatLOIASY/ENSKA GJUTERIFÖRENINGENS SERVICE AB“-.EATENT\_NoFamily\SE\21022586\Ändrad ansökan svaromàl 2SO6-í-O~0få\.21022586 ApplicationtextTolnstructor RWD 2006-l-C-34hcioc 10 529 710 9 Slutsatsen är således att en formmassa, vilken innehåller sand och kolhaltigt material, och där det kolhaltiga materialet innehåller stenkol och/eller sotersättningsmedel, vari det kolhaltiga materialets största beståndsdel är koks, kan göras acceptabel ur såväl emissionssynpunkt som ur vidhäftningssynpunkt.Since the emissions of volatile organic compounds are directly proportional to the amount of coal powder / soot substitute, it is stated that Samples 5-7 should also be acceptable from an emission point of view. 2006-10-05 13:42 V: \ __ N <> OrganiSatLOIASY / ENSKA GJUTERIFÖRENINGENS SERVICE AB “-. EATENT \ _NoFamily \ SE \ 21022586 \ Amended application for answer 2SO6-í-O ~ 0få \ .21022586 34hcioc 10 529 710 9 The conclusion is thus that a molding composition which contains sand and carbonaceous material, and where the carbonaceous material contains coal and / or carbon black substitutes, in which the carbonaceous material's largest component is coke, can be made acceptable from both emission and adhesion points.
Den höga vidhäftningen av formmassa i Prov 7 torde bero på att den totala mängden kolhaltigt material varit för låg, ca 1,9 vikt-9. Detta torde kunna åtgärdas genom tillsats av ytterligare koks, dvs höjning av kolhalten.The high adhesion of molding compound in Sample 7 is probably due to the fact that the total amount of carbonaceous material was too low, about 1.9 wt-9. This should be remedied by adding additional coke, ie increasing the carbon content.
En annan möjlig åtgärd är tillsats av zeoliter, exempelvis som visas i EP-1 469 960 Al. 20126410-05 13:42 V:\_NoOrqaniSatiOn\SVENSKA GJUTERIFÖRENIEJGENS SEEVECE A5\PATENT\_NoE'amily\SE\2iO22586\Ändrad ansökan SY/'arornål 2006-lO~04\210225â6 AçplicationtextToInstructor RWD 2006-l0-O4.docAnother possible measure is the addition of zeolites, for example as shown in EP-1 469 960 A1. 20126410-05 13:42 V: \ _ NoOrqaniSatiOn \ SVENSKA GJUTERIFÖRENIEJGENS SEEVECE A5 \ PATENT \ _NoE'amily \ SE \ 2iO22586 \ Ändrad ansökan SY / 'arornål 2006-lO ~ 04 \ 210225â6 AçplicationtextW4
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Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0502882A SE529710C2 (en) | 2005-12-22 | 2005-12-22 | Molding material, use of molding material and molding process |
| EP06126676A EP1800771B1 (en) | 2005-12-22 | 2006-12-20 | A moulding material and a method for casting, and an additive for the moulding material |
| DE602006021383T DE602006021383D1 (en) | 2005-12-22 | 2006-12-20 | Composition of sand mold and foundry process and sand mold additive |
| AT06126676T ATE506129T1 (en) | 2005-12-22 | 2006-12-20 | MATERIAL COMPOSITION OF SAND MOLD AND FOUNDRY PROCESS AND SAND MOLD ADDITIVE |
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| SE0502882A SE529710C2 (en) | 2005-12-22 | 2005-12-22 | Molding material, use of molding material and molding process |
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| SE0502882L SE0502882L (en) | 2007-06-23 |
| SE529710C2 true SE529710C2 (en) | 2007-10-30 |
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| EP (1) | EP1800771B1 (en) |
| AT (1) | ATE506129T1 (en) |
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| SE (1) | SE529710C2 (en) |
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| SE1650208A1 (en) | 2016-02-17 | 2017-06-27 | Swerea Swecast Ab | A carbonacous additive for a moulding material for casting iron |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2830913A (en) * | 1955-10-11 | 1958-04-15 | Exxon Research Engineering Co | Carbonaceous molding material for foundry operations |
| SE413997B (en) * | 1977-01-17 | 1980-07-07 | Westin & Backlund Ab | SET FOR MANUFACTURE OF CASTING OR CASTOR CORN FROM A WATER-CONTAINING FORMAND, BINDING AND CARBONIC MATERIAL THAT CAN IMAGE SO CALLED GLASS COOL, AND FORMULA INTENDED TO BE USED IN THE SET |
| US5094289A (en) * | 1990-09-19 | 1992-03-10 | American Colloid Company | Roasted carbon molding (foundry) sand and method of casting |
| US5893946A (en) * | 1996-06-21 | 1999-04-13 | Amcol International Corporation | Combustible carbonaceous compositions and methods |
| US5769933A (en) * | 1996-06-21 | 1998-06-23 | Amcol International Corporation | Activated carbon foundry sand additives and method of casting metal for reduced VOC emissions |
| US5810918A (en) * | 1996-06-21 | 1998-09-22 | Amcol International Corporation | Method of analyzing and/or treating foundry sands for reduced VOCs |
| US5695554A (en) * | 1996-06-21 | 1997-12-09 | Amcol International Corporation | Foundry sand additives and method of casting metal, comprising a humic acid-containing ore and in-situ activated carbon or graphite for reduced VOC emissions |
| US6860319B2 (en) * | 2003-06-04 | 2005-03-01 | American Colloid Company | Acid activated clay for use in foundry sand |
-
2005
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2006
- 2006-12-20 DE DE602006021383T patent/DE602006021383D1/en active Active
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Also Published As
| Publication number | Publication date |
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| EP1800771B1 (en) | 2011-04-20 |
| SE0502882L (en) | 2007-06-23 |
| DE602006021383D1 (en) | 2011-06-01 |
| EP1800771A1 (en) | 2007-06-27 |
| ATE506129T1 (en) | 2011-05-15 |
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