EP2872272A2 - Semipermanentes trennbeschichtungssystem mit hoher standzeit für formen im kupferanodenguss - Google Patents
Semipermanentes trennbeschichtungssystem mit hoher standzeit für formen im kupferanodengussInfo
- Publication number
- EP2872272A2 EP2872272A2 EP13736881.7A EP13736881A EP2872272A2 EP 2872272 A2 EP2872272 A2 EP 2872272A2 EP 13736881 A EP13736881 A EP 13736881A EP 2872272 A2 EP2872272 A2 EP 2872272A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- release agent
- mold release
- agent according
- casting
- molds
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005266 casting Methods 0.000 title claims abstract description 34
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 24
- 239000010949 copper Substances 0.000 title claims abstract description 24
- 238000000576 coating method Methods 0.000 title description 27
- 239000011248 coating agent Substances 0.000 title description 25
- 238000005507 spraying Methods 0.000 claims abstract description 6
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 10
- 239000011230 binding agent Substances 0.000 claims description 9
- 239000002105 nanoparticle Substances 0.000 claims description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 4
- 235000019353 potassium silicate Nutrition 0.000 claims description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
- 150000004760 silicates Chemical class 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052582 BN Inorganic materials 0.000 claims description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- YXTPWUNVHCYOSP-UHFFFAOYSA-N bis($l^{2}-silanylidene)molybdenum Chemical compound [Si]=[Mo]=[Si] YXTPWUNVHCYOSP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052593 corundum Inorganic materials 0.000 claims description 2
- 239000010431 corundum Substances 0.000 claims description 2
- 239000000839 emulsion Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 2
- 229910021344 molybdenum silicide Inorganic materials 0.000 claims description 2
- 239000005365 phosphate glass Substances 0.000 claims description 2
- 229910052615 phyllosilicate Inorganic materials 0.000 claims description 2
- 229910021332 silicide Inorganic materials 0.000 claims description 2
- 229920002050 silicone resin Polymers 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000006082 mold release agent Substances 0.000 claims 7
- 230000001680 brushing effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000919 ceramic Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 17
- 238000004513 sizing Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 238000011109 contamination Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 230000002860 competitive effect Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 239000004111 Potassium silicate Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 235000015067 sauces Nutrition 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
Definitions
- Copper is one of the world's most important engineering metals and is produced, remelted and traded at millions of tonnes per annum.
- One of the most important raw materials is anodes made of raw copper. Copper anodes are the slugs of smelter copper that are fed to the electrolysis to ultimately be refined into high purity copper in this process. It is shown in simplified form in the anodes to plates of approximately 100 x 100 x 5 cm.
- a casting wheel while several (usually 15 to 25) tons heavy casting molds made of steel or copper from a solid copper material are circulated. With a volume flow of> 20 kg / s, the molten copper melt is poured into the mold from a height of 20 cm to 30 cm at a casting wheel position. At another position in the cycle, the solidified anodes are removed with a device of the mold. The anodes are then immersed in a cooling water tank and then fed to other processes.
- the mold When pouring molten copper into an unprotected copper mold, the mold would be melted and mold and casting would bond together or irreversibly weld. Therefore, the mold is protected with a mineral layer, the so-called “sizing.” Due to the high chemical, thermal and by the casting current mechanical stress, the sizing is usually partially washed away during pouring or it remains during the removal, the "molding" on hang on the casting. Therefore, the sizing is sprayed on every casting. In order to minimize the risk of caking of the casting in the mold, the sizing with high layer thickness (700-1200 ⁇ ) is applied.
- the prior art uses as a release agent a single-layer system in the form of a release agent suspension, which is applied before each individual casting and holds only a single casting.
- This sizing consists of a mineral powder and water. In some cases, a binder (binder) is used. As mineral powder find barium sulfate or inorganic coarse-grained rock silicates application. It also comes to the use of clay or sand. In all systems it comes to the sizing with the casting is discharged and requires a previous order of the sizing with each casting. This results in the following disadvantages:
- the market therefore calls for a long-lasting release agent with low consumption, good heat conduction and a long-term stable binder with very good thermal shock resistance and high resistance to molten copper.
- the sprayable or paintable release layer according to the invention comprises a two-layer system which has hitherto not been used in copper anode casting.
- the adhesion and release properties of the two coatings can be designed so that the required different properties at the contact point ⁇ Form coating> and ⁇ coating - casting (anode)> can be represented.
- the first layer consisting of binder and filler, serves as a "base coat" in the mold and is designed so that high thermal resistance and high Adhesive force to form and at the same time a good primer for the second layer is formed.
- Possible binders of the base coating are: water-soluble phosphate glasses, soda or potassium water glasses, glass frits and oxidic nanoparticles such as titanium dioxide.
- Possible fillers are coarsely crystalline titanium oxide, barium sulfate, silicates, silicides, Christobalite or corundum. Nanoparticles are characterized by a particle size determined by X-ray diffractometry below 100 nm. Coarsely crystalline powders have a primary particle size greater than 1 ⁇ m.
- the coat applied to the base coat "Top Coat” is designed to ensure the highest possible separation effect to the liquid copper.
- the potential binders of the top coating are zirconium oxide nanoparticles, titanium oxide nanobinder, soda or potassium silicate and silicone resin emulsions are barium sulfate, hexagonal boron nitride, phyllosilicates, talc, graphite, molybdenum sulfide, molybdenum silicide and tungsten sulfide.
- the solvent used in both the topcoat and the basecoat is water;
- organic process additives are used to a small extent ( ⁇ 5% by weight). Both coatings have a solids content between 10 and 50 wt .-%.
- the two-layer system remains stable in shape and is not discharged with the castings. It has a lifetime of at least 20-30 casts before it needs to be renewed. This corresponds to discontinuous operation of a production batch. It can also be selectively renewed in the process without the system having to be driven off.
- the consumption of coating material (disposable release agent) is reduced by more than 99%. All secondary disadvantages of Ein Anlagenproblematik be eliminated.
- the heat transfer is improved; Increased production efficiency is an option as the cooling rate is increased.
- the cooling time / solidification time is no longer the primary bottleneck.
- composition of the coating products :
- Form 1 Base Coating: about 200 ⁇ thick
- Top coating about 200 ⁇ thick
- a competitive single-layer system (silicate-waterglass Slip) used.
- the competitor product was ordered in an automatic slick "shower", which was used before and during the process before each casting.
- the anodes (castings) from molds 1 and 2 can be demolded well.
- the anodes are dark red on removal (colder than anodes of the other forms). No release agent adheres to the formed anodes.
- the anodes from the other 18 forms are light orange.
- the release agent applied in the process adheres to them.
- Form 2 on the other hand, provided good molding properties and consistent results over 15 casts. Thereafter, the attempt was aborted because re-equipment of the casting set-up became necessary. Damage to the separating layer according to the invention could not be recognized.
- the anodes of the 18 slip-sprayed molds were clearly identified after casting by a white coating (the remainder of the release agent that is constantly being built up).
- Example 2 In another anode caster an experiment was carried out using a copper anode casting wheel with 18 molds in continuous operation.
- Top coating about 200 ⁇ thick
- Top coating in heavily loaded areas approx. 400 ⁇ m thick.
- the two copper anodes (castings) from molds 1 and 2 can be removed from the mold very well.
- the anodes are dark red on removal (colder than anodes of the other forms). No release agent adheres to the formed anodes.
- the anodes have a high contour sharpness, which is due to the controlled coating.
- the coating was correspondingly adjusted in the heavily loaded area by spot-spraying.
- the layer thickness was set in the entire mold.
- the anodes of the 16 molds sprayed with standard schicker were clearly identified by a white coating after casting. A total of 350 kg standard schicker was consumed in the casting of 150 t of copper (without initial coating), compared with about 0.5 kg of the product according to the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210013838 DE102012013838A1 (de) | 2012-07-13 | 2012-07-13 | Semipermanentes Trennbeschichtungssystem mit hoher Standzeit für Formen im Kupferanodenguss |
PCT/EP2013/064467 WO2014009359A2 (de) | 2012-07-13 | 2013-07-09 | Semipermanentes trennbeschichtungssystem mit hoher standzeit für formen im kupferanodenguss |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2872272A2 true EP2872272A2 (de) | 2015-05-20 |
EP2872272B1 EP2872272B1 (de) | 2016-06-08 |
Family
ID=48790434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13736881.7A Active EP2872272B1 (de) | 2012-07-13 | 2013-07-09 | Semipermanentes trennbeschichtungssystem mit hoher standzeit für formen im kupferanodenguss |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2872272B1 (de) |
DE (1) | DE102012013838A1 (de) |
WO (1) | WO2014009359A2 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014209971A1 (de) * | 2014-05-26 | 2015-11-26 | Dieter Kutzner | Reparaturmasse für Keramikbauteile |
DE102016205729A1 (de) | 2016-04-06 | 2017-10-12 | Ceranovis Gmbh | Trennmittel für Formen im Kupferanodenguss sowie damit beschichtete Formen |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE372310T1 (de) * | 2003-06-13 | 2007-09-15 | Esk Ceramics Gmbh & Co Kg | Dauerhafte bornitrid-formtrennschichten für das druckgiessen von nichteisenmetallen |
DE10326769B3 (de) * | 2003-06-13 | 2004-11-11 | Esk Ceramics Gmbh & Co. Kg | Dauerhafte BN-Formtrennschichten für das Druckgießen von Nichteisenmetallen |
DE102008026535A1 (de) * | 2008-06-03 | 2009-12-17 | Itn Nanovation Ag | Verfahren zum Vergießen von Kupfer und kupferhaltigen Legierungen |
-
2012
- 2012-07-13 DE DE201210013838 patent/DE102012013838A1/de not_active Withdrawn
-
2013
- 2013-07-09 WO PCT/EP2013/064467 patent/WO2014009359A2/de active Application Filing
- 2013-07-09 EP EP13736881.7A patent/EP2872272B1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2014009359A2 * |
Also Published As
Publication number | Publication date |
---|---|
EP2872272B1 (de) | 2016-06-08 |
WO2014009359A2 (de) | 2014-01-16 |
WO2014009359A3 (de) | 2014-12-18 |
DE102012013838A1 (de) | 2014-01-30 |
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