MXPA01007866A - Casting mould for manufacturing a cooling element and cooling element made in said mould - Google Patents
Casting mould for manufacturing a cooling element and cooling element made in said mouldInfo
- Publication number
- MXPA01007866A MXPA01007866A MXPA/A/2001/007866A MXPA01007866A MXPA01007866A MX PA01007866 A MXPA01007866 A MX PA01007866A MX PA01007866 A MXPA01007866 A MX PA01007866A MX PA01007866 A MXPA01007866 A MX PA01007866A
- Authority
- MX
- Mexico
- Prior art keywords
- mold
- cooling element
- cooling
- mould
- casting
- Prior art date
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 33
- 238000005266 casting Methods 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910002804 graphite Inorganic materials 0.000 claims description 8
- 239000010439 graphite Substances 0.000 claims description 8
- 239000003507 refrigerant Substances 0.000 claims description 6
- 229910000570 Cupronickel Inorganic materials 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 4
- 238000009853 pyrometallurgy Methods 0.000 claims description 2
- -1 nickel copper Chemical compound 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 210000000481 Breast Anatomy 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910018054 Ni-Cu Inorganic materials 0.000 description 1
- 229910018481 Ni—Cu Inorganic materials 0.000 description 1
- 231100000078 corrosive Toxicity 0.000 description 1
- 231100001010 corrosive Toxicity 0.000 description 1
- 230000001808 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000001681 protective Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The invention relates to a casting mould for manufacturing of a cooling element for a pyrometallurgical reactor, wherein the casting mould is at least partly cooled and lined with a material that can withstand high temperatures. The invention also relates to the cooling element made in the mould, inside which cooling pipes made of nickel copper are placed during fabrication.
Description
MOLD FOR FOUNDRY TO MANUFACTURE A REFRIGERANT ELEMENT AND REFRIGERANT ELEMENT PREPARED IN THIS
MOLD
The invention relates to a casting mold for manufacturing a cooling element for a pyrometallurgical reactor, wherein the casting mold is cooled at least in part and is coated with a material that can withstand high temperatures. The invention also relates to the cooling element made in the mold.
In pyrometallurgical processes, the brickwork of a reactor is protected by cooling elements cooled by water so that, due to the cooling effect, the heat that comes to the surface of the brickwork is transferred through the cooling element to the water, where the wear on the coating decreases considerably compared to a reactor not provided with refrigeration. The decrease in wear is caused by the result of cooling, a so-called autogenous coating, formed of slag and other molten phases that adhere to the fireproof surface of the coating.
Traditionally, the cooling elements are manufactured by two methods: First, the elements can be manufactured by casting in sand molds. In this method, refrigerant pipes made of very thermo-conductive material such as copper are placed in a mold dug in the sand, so that during the pouring, there is cooling either by air or water occurring around the pipes. The element to be fused around the pipe is also made of a very thermo-conductive material, advantageously copper. This method of manufacture has been described in, for example, UK Patent Document GB 1386645. The problem with this method is the uneven coupling of the pipe which acts as a flow channel to the surrounding casting material, since part of the The pipe can be completely decoupled from the molten element around and part of the pipe can be completely melted and consequently damaged. If no metal tie is formed between the refrigerant pipe and the other molten element around it, the heat transfer will not be effective. If the pipe is completely melted, it will prevent the flow of cooling water. The melting properties of the casting material can be reinforced, for example, by mixing some phosphorus in the copper, which will improve the metallic bond that is formed between the pipe and the casting material, but in this way the transfer properties of the Heat (thermal conductivity) of the molten copper deteriorate considerably with only small additions. The advantages of this method can be mentioned as the comparatively low manufacturing costs and independence of the dimensions.
A manufacturing method has also been used where glass pipes in the form of a flow channel are placed inside the mold of a cooling element, in which the glass pipe is broken, so that a flow channel is formed inside the element.
United States Patent Document 4382585 discloses another widely used manufacturing method for cooling elements whereby the element is manufactured, for example, from rolled copper plates, by machining the channels is necessary. The advantage of this method is the dense, strong structure and the good heat transfer from a cooling medium such as water to the element. The disadvantages are the dimensional limitations (size) and the high cost.
Now a mold has been developed to manufacture a cooling element for a pyrometallurgical reactor to replace the casting in previous sand molds.
The mold is constructed of very thermo-conductive copper plates, separated from which at least some are cooled by water. Because the cooling element itself is in most cases copper, the casting mold construction plates must be insulated from the molten copper, and this occurs by coating the inside of the mold with a very thermo-conductive material such as a graphite plate, so that the parts of the mold adhere to the surface by means of underpressure. The graphite prevents the casting that is poured into the mold from sticking to the surface of the mold. The mold of the cooling element is advantageously provided with an upper half-shell, so that the casting can be made in a protective gas. Before pouring, the refrigerant pipes necessary for the circulation of the cooling water that will go inside the cooling element are put in the mold. This pipe is preferably made of cupro-nickel tubes, because the melting point of the Ni-Cu pipe is higher than that of the copper that is cast around it and therefore there is no risk that the pipe melts during the casting .
The essential features of the invention would become apparent in the appended patent claims. I i
The construction of the mold described in the present invention offers the following advantages:
Thanks to the cooled mold and to the graphite coating, a firm, fine-grained cast is formed, particularly at the base of the mold.
-The construction of the mold means that the cooling element forms a smooth surface that is not vulnerable to corrosive conditions of cast iron. I I The cupronickel used as material for the cooling pipe of the cooling element facilitates a good welding of the conduit to the real element.
The construction of the mold can be further developed so that it can also be used to make refrigerating elements designed for special purposes. This occurs, for example, by adding graphite or fire-proof molded parts to the mold, so that the design of the finished element differs correspondingly from the plate version.
The invention can be further described with the help of the accompanying diagrams, wherein Figure 1 presents a basic drawing of the mold according to this invention and I
Figure 2 shows the mold in cross-section with which cooling elements can be molded for special purposes.
Figure 1 shows a basic drawing of a mold 1 for melting of cooling element. The mold is composed of a mold base mold 2 which is provided with a cooling pipe 3. i
The mold also has lateral walls 4 and 5 i and i end walls from which only a rear wall 6 is shown in the drawing. In the drawing, only the base plate is provided with cooling pipes but, if necessary, the side walls and the end walls can also be equipped for cooling. The front end wall has been omitted from the drawing for reasons of clarity, although it definitely belongs to the mold.
The interior of the mold is coated with a graphite plate 7. The cooling pipe 8 of the cooling element, which is advantageously made of cupro-nickel, is supported inside the mold. The mold is also provided with a top half-shell (not shown) so that shielding gas can be used to prevent oxidation of the element to be melted.
In Figure 2 it can be seen that pieces 9 formed can be placed on the base of the mold which is made of graphite or some other incombustible material. By means of these formed pieces, the side 11, which will come into contact with the base 2 of the cooling element mold 10, can be formed as desired.
Claims (6)
1. Casting mold formed by a base, walls and end plates to manufacture a coolant elemer.to a pyrometallurgy reactor, characterized in that the mold made of copper plates is equipped at least in part with cooling pipes and that the mold is coated inside with a plate resistant to high temperatures.
The mold according to claim 1, characterized in that the mold is coated with graphite plates. I
3. Mold according to claim 1, characterized in that the plates resistant to high temperatures are fixed to the surface of the mold by means of underpressure.
4. Mold according to claim 1, characterized in that formed pieces made of graphite or fire resistant material are placed in the base of the mold. '
5. Coolant element for a reactor irfitertriiariiaa. It is a pyrometallurgical manufactured in a mold, characterized in that refrigerant pipes, placed inside the cooling element, are made of cupro-nickel.
6. Coolant element according to claim 4, characterized in that during the manufacture of the cooling element, one side of the element is formed by means of formed parts placed in the base of the mold. I
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI990198 | 1999-02-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MXPA01007866A true MXPA01007866A (en) | 2002-05-09 |
Family
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