OA16981A - Cooling element and method for manufacturing a cooling element. - Google Patents
Cooling element and method for manufacturing a cooling element. Download PDFInfo
- Publication number
- OA16981A OA16981A OA1201400207 OA16981A OA 16981 A OA16981 A OA 16981A OA 1201400207 OA1201400207 OA 1201400207 OA 16981 A OA16981 A OA 16981A
- Authority
- OA
- OAPI
- Prior art keywords
- fumace
- coating
- cooling element
- flash
- cooling
- Prior art date
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- 238000001816 cooling Methods 0.000 title claims abstract description 96
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 125
- 239000011248 coating agent Substances 0.000 claims abstract description 117
- 238000003723 Smelting Methods 0.000 claims abstract description 44
- 239000000725 suspension Substances 0.000 claims abstract description 28
- 239000010949 copper Substances 0.000 claims abstract description 26
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052802 copper Inorganic materials 0.000 claims abstract description 24
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 8
- 239000000956 alloy Substances 0.000 claims abstract description 8
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical class [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 10
- 238000003754 machining Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 7
- 239000011651 chromium Substances 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 229910052803 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 229910000856 hastalloy Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910001026 inconel Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The invention relates to a cooling element for a pyrometallurgical furnace such as for a flash smelting furnace or for a flash converting furnace or for a suspension smelting furnace. The invention relates also to a method for manufacturing a cooling element for a pyrometallurgical furnace such as for a flash smelting furnace or for a flash converting furnace or for a suspension smelting furnace. The cooling element (2) has a fire surface (2) to be in contact with an interior of the metallurgical furnace. The cooling element comprises a base element (4) containing copper and a coating (5) at least partly covering the base element (4). The coating (4) forms the fire surface (2) of the cooling element (1). The coating (5) is at least partly applied by a laser coating process such as laser deposition, and the coating (5) contains a Ni based alloy.
Description
COOLING ELEMENT AND METHOD FOR MANUFACTURING A COOLING ELEMENT
Fieid of the invention
The invention relates to a cooling element for a pyrometallurgical fumacc such as for a flash smelting fuma ce or for a flash converting fumace or for a suspension smelting fumacc as defined in the preamble of indepcndent claim 1, wherein the coolïng element has a fire surface to be in contact with an interior of the metallurgical fumace wherein the coolïng element comprises a base element containing copper and a coating at least partly covering the base element, and 10 wherein the coating forms at least partly the fire surface of the coolïng element.
The invention relates also to a method for manufacturing a coolïng element for a fumace such as for a flash smelting fumace or for a flash converting fumace or for a suspension smelting fumace as defined in the preamble on îndependent claim 10, wherein the cooling element comprising a base element containing copper and a fire surface lo be in contact with an interior 15 of the metallurgical fumacc, wherein the method comprising a providing step for providing a base element containing copper and a coating step for coating the base element with a coating that at least partly covcrs the base element so that the coating forms the fire surface of the cooling element.
Cooling cléments comprising a base element of copper and coating at least partly 20 covering the base element are known in the art.
Publication WO 2004/042195 présents a method for preparing a coating for pyrometallurgical furnace cooling éléments. The purpose of the invention is to attaîn a method for the formation of a coating on a metallurgical fumace cooling element in a simple way. This is done by using thermal spraying technology. Said cooling element comprises mainiy a frame 25 section of copper and a channel network made in the frame section for the circulation of the cooling medium. A corrosion-résistant coating is arranged on at least part ofthe element surface, the coating forms a metallurgical bond together with the element and that the basic structure of the coating forms of substantially iron and/or nickel based materials.
Publication FI 120047 B présents a method for coating a copper element. In this method 30 the copper element is coated by means of an arc welding method in one coating step with a dense, wear résistant, corrosion résistant, and/or high température résistant coating having a thickness in the range of more than 1 mm.
Publication WO 2008/037836 présents a method for coating a cooling element mainiy made of copper, provided with water cooling pipes and used particularly in connection with 35 métallurgie fumaces or the like, wherein the cooling element includes a fire surface that is in contact with molten métal, suspension or process gas; stde surfaces and an outer surface, so that at least part of the fire surface is coated by a corrosion résistant coating.
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Objective of the invention
An object of the invention is to provide a cooling element comprising a base element of copper and coating at least partly covering the base element with a good metallurgical bond 5 between the coating and the cooling element.
Another object of the invention is to provide a method for manufacturing a cooling element comprising a base élément of copper and coating at least partly covering the base element and having a good metallurgical bond between the coating and the cooling element.
Short description of the invention
The cooling element of the invention is characterized by the définitions of independent claim 1.
Preferred embodiments of the cooling element are defined in the dépendent claims 2 to 9.
The method for manufacturing a cooling element is correspond ingly characterized by the 15 définitions of independent claim i 0.
Preferred embodiments of the method are defined in the dépendent claims 1 i to 19.
The invention is based on the coating being at least partly applied by a laser coating process such as laser déposition and on the coating containing a nickel, Ni, based alloy.
The coating may contain in percentages of mass: Iran, Fe, 0.1 to 15 %; Nickel, Ni, 50 to 20 65 %; Chromium, Cr, 1 to 30 %; Molybdenum, Mo, 5 to 30 %; Copper, Cu, less than 2%;
Manganèse, Mn, less than 3%; Cobalt, and Co, less than3%.
The good metallurgical bond achieved by laser depositing the coating improves heat transfer between the copper of the base element and the coating minimizes the surface température of the cooling element and minimizes thermal expansion différences between the 25 copper of the base element and the coating. The coating does not negatively affect the cooling capacity of the cooling element.
The surface of the coating is preferably smooth and it provides for protection against corrosion and érosion of the cooling element and as a conséquence a smooth surface of the cooling element can remain smooth and therefore the cooling element has a good non-sticking 30 surface property for a much longer time compared to a cooling element in which the copper of the base element forrns the fire surface of the cooling element.
A manufacturing process for manufacturing a cooling element according to the invention may involve the following steps: rough machining of the surface of the base element to be coated, the actual coating process, and machining of the surface to desired smoothness and 35 dimensional tolérances.
Several advantages are achieved by a cooling element according to the invention.
In laser coating, the coating material, powder or wire, is applied on the surface of the base material through a melting process. In laser coating the coating material is injected with a carrier »
gas to the laser beam traversing on a surface of the material or component to be coated. The coating material absorbs energy from the laser beam, starts hcating and melting in-flight and deposits on the surface of the base material. Part of the energy is also absorbed by the surface causing controlled melting of a thin layer of the base material. This ensurcs the formation of a 5 real metallurgical bonding between the coating and the base material.
In laser coating a me 11 pool of the coating material is formed which in tum results in coating without porosity.
Because heating is concentrated on a very thin surface layer of the base material, the mixing between the two materials (coating and base material) i.e. dilution, is minimal. This 10 ensures that the properties of the coating material is utilized most effectively and the fire surface will obtain the characteristics of a nickel-based alloy, not the characteristics of a nickel-copperalloy.
Laser coating makes it possible to achieve a coating being sufficiently thick.
Because the cooling rate of the coating is very rapid, unwanted changes in the 15 microstructure of the coating will not occur. Additîonally very fine microstructure is formed which is bénéficiai for corrosion and wear properties.
The laser coating process can be automated, which leads to an uniform quality of the coating.
The coating provides additîonally for protection against wet corrosion i.e. corrosion due 20 to condensing of acid on the cool surface of the cooling element and provides for protection for the base element of copper against impurities harmful for the base element of copper.
Because the coating is harder that copper, the coating will also protect against érosion. The coating will provide for a slippery fire surface, because the surface will be smooth, which hinders excrescences from adhering to the fire surface.
The surface smoothness of the coating will remain smooth for a much longer time compared to a smooth copper surface, due to the lower rate of corrosion and érosion. This increases the non-sticking surface property.
In a preferred embodiment of the invention, the cooling element is arranged in an outlet for discharging mclt such as moltcn métal from a pyrometallurgical fumace such as in an outlet 30 for discharging melt such as moltcn métal from a flash smelting fumace or from a flash converting fumace.
In a preferred embodiment of the invention, the cooling element is arranged in a chamber for holding molten métal of the pyrometallurgical fumace such as in a lower fiimace of a flash smelting fumace or in a lower fumace of a flash converting fumace.
In a preferred embodiment of the invention, the cooling element is arranged in a chamber for gas and/or for suspension in a pyrometallurgical fumace such as in a reaction shafi or in an uptake shafi of a flash smelting fumace, or in a reaction shafi or in an uptake shafi of a flash converting fumace, or in a reaction shafi or in an uptake shafi of a suspension smelting fumace.
List of figures
In the following the invention will described in more detail by referring to the figures, of which
Figure 1 shows a detail view of a part of a pyrometallurgical furnace provided with 5 cooling element according to a preferred embodiment of the invention, and
Figure 2 is a principle viewof a suspension smeltïng furnace.
Detalled description of the Invention
The invention relates to a cooling element ! for a pyrometallurgical furnace (not mariced 10 with a reference number) such as for a flash smelting furnace or for a flash converting furnace or for a suspension smelting furnace.
The cooling element has a fire surface 2 to be in contact with an interior 3 of the metalîurgical furnace.
The définition interior” includes also tap holes and tap openings of a pyrometallurgical 15 fumace.
The cooling element comprises a base element 4 containing copper and/or copper alloy and a coating 5 at least partly covering the base element.
The coating 5 forms at least partly the fire surface 2 of the cooling element l.
The coating 5 being at least partly applied by a laser coating process such as laser 20 déposition. The coating 5 contains a nickel based alloy i.e. a Ni based alloy.
The coating 5 may contain in mass percentages:
Iron, Fe : 0.1 to 15 %;
Nickel, Ni : 50 to 65 %;
Chromîum, Cr : l to 30 %;
Molybdenum, Mo : 5 to 30 %;
Copper, Cu : less than 2%;
Manganèse, Mn less than 3%; and
Cobalt, Co: less than3%.
Hastelloy® (by Haynes International, Inc.) or Inconel® (by Spécial Metals Corporation) 30 may be used as coating materials.
In a preferred embodiment of the cooling element 1 the thickness of the coating is in the range of I to 5 mm.
In a preferred embodiment of the cooling element the coating covers the fire surface of the cooling element substantially completely.
In a preferred embodiment of the cooling element, the coating 5 forms the fire surface 2 of the cooling element 1 substantially completely.
In a preferred embodiment ofthe cooling element the coating forms the fire surface ofthe cooling element and in that the coating extends beyond the fire surface of the cooling element to other parts of the base element such as the sides of the base element.
In a preferred embodiment of the invention, the cooling element is arranged in an outlet 6 for discharging melt such as molten métal from a pyrometallurgical fumace such as in an outlet for discharging melt such as molten métal from a flash smelting fumace or from a flash converting fumace or from a suspension smelting fumace.
In a preferred embodiment of the invention, the cooling element is arranged in a chamber for holding molten métal of the pyrometallurgical fumace such as in a lower fumace of a flash smelting fumace, or in a lower fumace of a flash converting fumace, or in a lower fumace 7 of a suspension smelting fumace.
In a preferred embodiment of the invention, the cooling element is arranged in a chamber for gas and/or for suspension in a pyrometallurgical fumace such as in a reaction shaft or in an uptake shaft of a flash smelting fumace, or in a reaction shaft or in an uptake shaft of a flash converting fumace, or in reaction shaft 8 or in an uptake shaft 9 of a suspension smelting fumace.
The invention relates also to a method for manufacturing a cooling element for a pyrometallurgical fumace such as for a flash smelting fumace or for a flash converting fumace or for a suspension smelting fumace, wherein the cooling element 1 comprising a base element 4 containing copper and a fire surface 2 to be in contact with an interior of the metallurgical fumace.
The method comprises a providing step for providing a base element 4 containing copper.
The method comprises additionally a coating step for coating the base element 4 with a coating 5 that at least partly covers the base element 4 so that the coating 4 forms the fire surface 2 of the cooling element 1.
In the method the coating 5 is applied on the base element 4 in the coating step at least partly by a laser coating process such as laser déposition.
In the method the coating 5 applied on the base element 4 in the coating step contains a Ni based alloy.
In a preferred embodiment of the method a coating 5 is applied in the coating step containing in mass percentages: Iron, Fe, 0.1 to 15 %; Nickel, Ni, 50 to 65 %, Chromium, Cr, 1 to 30 %; Molybdenum, Mo, 5 to 30 %; Copper, Cu, Iess than 2%; Manganèse, Mn, Iess than 3%; and Cobalt, Co, Iess than 3%.
In a preferred embodiment of the method a coating 5 is applied in the coating step having a thickness in the range of 1 to 5 mm.
In a preferred embodiment of the method a coating 5 is applied in the coating step that forms the fire surface 2 of the cooling element 1 substantially completely.
In a preferred embodiment of the method a coating 5 is applied in the coating step that forms the fire surface 2 of the cooling element 1 and that extends beyond the fire surface 2 of the cooling element I to other parts of the base element such as sides of the base element.
A preferred embodiment of the method includes a machining step for machining at least partly the parts of the cooling element l to be coated by the coating 5 in the coating step prior the coating step.
A preferred embodiment of the method includes a machining step for machining the 5 coating 5 to desired smoothness and/or dimensional tolérances after the coating step.
A preferred embodiment of the method comprises an arranging step for arranging the cooling element l in an outlet for discharging melt such as molten métal from a pyrometallurgical fumace such as in an outlet 6 for discharging melt such as molten métal from a flash smelting fumace or from a flash converting fumace or from a suspension smelting fumace.
to A preferred embodiment of the method comprises an arranging step for arranging the cooling element I in a chamber for holding molten métal of the pyrometallurgical fumace such as in a lower fumace of a flash smelting fumace or in a lower fumace of a flash converting fumace or in a lower fumace 7 of a suspension smelting fumace.
A preferred embodiment of the method comprises an arranging step for arranging the t5 cooling element l in a chamber for gas and/or for suspension in a pyrometallurgical fumace such as în a reaction shaft or in an uptake shaft of a flash smelting fumace or in a reaction shaft or in an uptake shaft of a flash converting fumace or în a reaction shaft 8 or in an uptake shaft 9 of a suspension smelting fumace.
It is apparent to a person skilled in the art that as technology advanced, the basic idea of 20 the invention can be implemented in various ways. The invention and its embodiments are therefore not restricted to the above examples, but they may vary within the scope of the claims.
Claims (20)
- Claims1. Cooling element for a pyrometallurgieal fumace such as for a flash smelting fumace or for a flash converting fumace or for a suspension smelting fumace, wherein the cooling element (1) has a firc surface (2) to be in contact with an interior of the métallurgical fumace wherein the cooling element (1) comprises a base element (4) containing copper and a coating (5) at least parti y covering the base element (4), and wherein the coating (5) forms the firc surface (2) of the cooling element (1), characterized by the coating (5) being at least partly applied by a laser coating process such as laser déposition, and by the coating (5) containing a Ni based alloy.
- 2. The cooling element according to claim 1, characterized in that by the coating (5) containing in mass percentagesFe: 0.1 to 15 %,Ni: 50 to 65 %,Cr: 1 to 30 %,Mo: 5 to 30 %,Cu: less than 2%,Mn: less than 3%, andCo: less than 3%.
- 3. The cooling element according to claim 1 or 2, characterized by the thickness of the coating (5) is in the range of 1 to 5 mm.
- 4. The cooling element according to any of the claims 1 to 3, characterized by the coating (5) covers the fire surface of the cooling element (1 ) substantially completely.
- 5. The cooling element according to any of the claims 1 to 3, characterized by the coating (5) forms the fire surface (2) ofthe cooling element (1) substantially completely.
- 6. The cooling element according to any of the claims ! to 3, characterized by the coating (5) forms the fire surface (2) of the cooling element (l) and in that the coating (5) extends beyond the fire surface (2) of the cooling element (1) to other parts of the base élément such as sides of the base element (4).
- 7. The cooling element according to any of the claims 1 to 6, characterized by the cooling element (1) being arranged in an outlet for discharging melt such as moltcn métal from a pyrometallurgieal fumace such as in an outlet (6) for discharging melt such as molten métal from a flash smelting fumace or from a flash converting fumace or from a suspension smelting fumace.
- 8. The cooling element according to any of the ciaims 1 to 6, characterized by the cooling5 element (1) being arranged in a chamber for holding moltcn métal of the pyrometallurgical fumace such as in a lower fumace of a flash smelting fumace or in a lower fumace of a flash converting fumace or in a lower fumace (7) of a suspension smelting fumace.
- 9. The cooling element according to any of the ciaims 1 to 6, characterized by the cooling
- 10 element (1) being arranged in a chamber for gas and/or for suspension in a pyrometallurgical fumace such as în a reaction shaft or in an uptake shaft of a flash smelting fumace or in a reaction shaft or in an uptake shaft of a flash converting fumace or în a reaction shaft (8) or în an uptake shaft (9) ofa suspension smelting fumace.15 10. Method for manufacturing a cooling element for a pyrometallurgical fumace such as for a flash smelting fumace or for a flash converting fumace or for a suspension smelting fumace, wherein the cooling element (1) comprising a base element (4) containing copper and a fire surface (2) to bc in contact with an interior of the metallurgical fumace, wherein the method comprising20 a providing step for providing a base element (4) containing copper, and a coating step for coating the base element (4) with a coating (5) that at least partly covers the base element (4) so that the coating (4) forms the fire surface (2) of the cooling element (I), characterized25 by applying the coating (5) in the coating step at least partly by a laser coating process such as laser déposition, and by applying in the coating step a coating (5) containing a Ni based alloy.
- 11. The method according to daim 10, characterized30 by applying in the coating step a coating (5) containing in mass percentagesFe: 0.1 to 15 %,Ni: 50 to 65 %,Cr: 1 to 30 %,Mo: 5 to 30 %,35 Cu: less than 2%,Mn: less than 3%, andCo: less than 3%.
- 12. The method according to claim 10 or i 1, characterized by applying in the coating step a 40 coating (5) having a thickness in the range of 1 to 5 mm.
- 13. The method according to any of the claims 10 to 12, characterized by applying in the coating step a coating (5) that forms the fire surface (2) of the cooling element (1) substantially completely.
- 14. The method according to any of the claims 10 to 12, characterized by applying in the coating step a coating (5) that forms the fire surface (2) of the cooling element (1) and that extends beyond the fire surface (2) of the cooling element (1) to other parts of the base element such as sides of the base element.
- 15. The method according to any of the claims 10 to 14, characterized by a machining step for machining at least partly the parts of the cooling element (1) to be coated by the coating (5) in the coating step prior the coating step.15
- 16. The method according to any of the claims 10 to 15, characterized by a machining step for machining the coating (5) to desired smoothness and/or dimensional tolérances after the coating step.
- 17. The method according to any of the daims 10 to 16, characterized by an arranging step
- 20 for arranging the cooling element (1 ) in an outlct for discharging melt such as molten métal from a pyrometallurgical fumace such as in an outlct (6) for discharging melt such as molten métal from a flash smelting fumace or from a flash converting fumace or from a suspension smelting fumace.
- 25 18. The method according to any of the claims 10 to 16, characterized by an arranging step for arranging the cooling element (1) in a chamber for holding molten métal of the pyrometallurgical fumace such as in a lower fumace of a flash smelting fumace, or in a lower fumace of a flash converting fumace, or in a lower fumace (7) of a suspension smelting fumace.
- 30 19. The method according to any of the claims 10 to 16, characterized by an arranging step for arranging the cooling element (1) in a chamber for gas and/or for suspension in a pyrometallurgical fumace such as in a reaction shaft or in an uptake shaft of a flash smelting fumace, or in a reaction shaft or in an uptake shaft of a flash converting fumace, or in a reaction shaft (8) or in an uptake shaft (9) of a suspension smelting fumace.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20116202 | 2011-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| OA16981A true OA16981A (en) | 2016-02-26 |
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