CS204434B1 - Method of remedying power fallouts in melting channel of induction furnaces - Google Patents
Method of remedying power fallouts in melting channel of induction furnaces Download PDFInfo
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- CS204434B1 CS204434B1 CS859578A CS859578A CS204434B1 CS 204434 B1 CS204434 B1 CS 204434B1 CS 859578 A CS859578 A CS 859578A CS 859578 A CS859578 A CS 859578A CS 204434 B1 CS204434 B1 CS 204434B1
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- induction furnace
- molten metal
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- melting channel
- fallouts
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- Manufacture And Refinement Of Metals (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
Description
Sposob odstraňovania prerušenia prúdookruhu v taviacom kanálku indukčnej peceA method of removing a circuit break in a melting channel of an induction furnace
Vynález rieši sposob odstraňovania prerušenia prúdookruhu v taviacom kanálku inA dukčnej pece, vzniklého v dosledku roztrhnuti» taveného kovu v taviacom kanálku indukčněj pece.SUMMARY OF THE INVENTION The present invention is directed to a method of removing a circuit break in a melting channel of an induction furnace resulting from the rupture of molten metal in a melting channel of an induction furnace.
V súčasnosti sa vo farebnej metalurgii, na tavenie médi a jej zliatín používajú prevaŽne indukčně kanálkové pece, ktoré pracujú na principe využívania Jouleovho tepla,Presently, inductive channel furnaces are used in color metallurgy, melting media and its alloys, which operate on the principle of Joule heat,
A vznikájúceho prechodom elektrického prúdu vysokých hodnot sekundárom induktora pece, čo v danom případe je vlastně uzavretý okruh roztaveného kovu v kanálku indukčnej pece.And arising from the passing of a high current electric current through the furnace inductor secondary, which in the present case is actually a closed circuit of molten metal in the induction furnace channel.
Uplatněním elektrodynamických sil a skinefektu vplyvom elektromagnetickej indukcie dochádza k teplotným rozdielom taveného kovu na priereze kanálka, čím vzniká prúdenie kovu a dochádza k výměně tepelnej energie medzi kanálkom indukčnej pece a taviacim priestorom indukčnej pece.The application of electrodynamic forces and skin effect due to electromagnetic induction leads to temperature differences of the molten metal on the channel cross-section, creating a metal flow and exchange of heat energy between the induction furnace channel and the induction furnace melting chamber.
V prevédzke indukčných kanálkových pecí nastávajú případy, ktoré ohrozujú prevádzkyachopnost a zároveň i vlastnú životnost indukčnej pece. Závažný sposob ohrozenia prevádzky je prerušenie prúdookruhu v kanálku indukčnej pece vplyvom roztrhnutia taveniny.In the operation of induction channel furnaces, there are cases that endanger both the operability and the lifetime of the induction furnace. A serious danger to the operation is the interruption of the current circuit in the duct of the induction furnace due to the melting of the melt.
K tomuto javu dochádza v dosledku prudkého podchlaďenia taveniny v kanálku indukčnej pece.This phenomenon occurs as a result of the rapid supercooling of the melt in the channel of the induction furnace.
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Prerušenie prúdookruhu má za následek rýchle schladenie obsahu indukčnej pece a ztuhnutie taveného kovu.Interruption of the flow circuit results in rapid cooling of the content of the induction furnace and solidification of the molten metal.
V takýehto prípadoch je vždy potřebné indukčnú pec generálkoval - vybúral jej výmurovku, odstránil stuhnutý kov a znovu ju vymuroval.In such cases, the induction furnace is always needed to be generalized - it has pulled out the lining, removed the solidified metal and re-walled it.
Uvedené nevýhody odstraňuje sposob podlá vynálezu, ktorého podstata je v tom, že do medzery medzi výmurovkou taviacého kanálku a taveným kovom, vytvorenej smrštěním taveného kovu, aa nalieva roztavený cín pri teplote taveného kovu 300 až 800 °C, alebo roztavené olovo pri teplote taveného kovu 400 až 800 °C.These disadvantages are overcome by the method according to the invention, which consists in pouring molten tin at a molten metal temperature of 300 to 800 ° C or molten lead at a molten metal temperature into the gap between the lining of the melting channel and the molten metal formed by shrinkage of the molten metal. 400-800 ° C.
Výhody sposobu odstraňovania prerušenia prúdookruhu v taviacom kanálku indukčněj pece pódia vynálezu epočívajú v tom, že nie je potřebné pec generálkoval, tj. vybúral výmurovku pece, odstránil stuhnutý kov a indukčnú pec znovu vymuroval, čo sa prejavuje značným ekonomickým účinkom.The advantages of the method of removing the circuit break in the melting channel of the induction furnace according to the invention are that there is no need to generalize the furnace, i. demolish the furnace liner, remove the solidified metal, and re-dry the induction furnace, which has a significant economic effect.
Příklad konkrétného prevedenia sposobu podlá vynálezu je Sálej vysvětlený pomocou výkresu, na ktorom je znázorněný rez indukčného kanálku pece.An example of a particular embodiment of the method according to the invention is explained by means of a drawing in which a section of the induction channel of a furnace is shown.
Indukčná pec po zaznamenanéj poruche aa nechá aehládnúl na teplotu 400 *> 800 °C. Zmršlovanie kovu při schladnutí indukčnej pece vytvoří medzi výmurovkou £ a stuhnutým kovom dostatočne veíkú medzeru 1, na zatekanie cínu, alebo olova do miesta prerušenia kanálka 2 indukčnej pece. Je však dobré, aby na úrovni hladiny stuhnutsj taveniny bol po obvode vysekaný žliabok J pre roztavený cín, alebo roztavené olovo.The induction furnace is allowed to heat to 400 * > 800 ° C after the noted failure aa. The shrinkage of the metal when the induction furnace cools down creates a sufficiently large gap 1 between the liner 6 and the solidified metal 1 for leakage of tin or lead to the interruption point of the induction furnace channel 2. However, it is good that the molten tin chute or molten lead is cut at the periphery of the solidified melt level.
Počas zatekania cínu alebo olova indukčná pec bola připojená na najnižší regulačný stupeň transformátora. Údery na hladinu taveného kovu v indukčnej peci urýchlily čas zatekania cínu alebo olova do utrhnutého priestoru kanálka 2. V okamihu, keň sa medzera vytvořená roztrhnutím taveného kovu vyplnila cínom alebo olovom, obnovil sa prúdookruh sekundárné j časti induktora a postupným nahrievaním došlo k úplnému roztaveniu obsahu indúkčnej pece.During the tin or lead leakage, the induction furnace was connected to the lowest regulating stage of the transformer. Strikes on the molten metal level in the induction furnace accelerated the time of tin or lead leakage into the torn space of channel 2. When the gap formed by the rupture of the molten metal was filled with tin or lead, the secondary circuit of the inductor was restored and gradually melted. induction furnace.
V případe, že indukčná pec je studená, musí sa nahrial, například .plynovými horákmi, na teplotu vyššiu ako je teplota roztaveného cínu alebo roztaveného olova, tj. 300 ? -400 °C. Postup je rovnaký ako pri vyhriatej peci.If the induction furnace is cold, it must be heated, for example by gas burners, to a temperature higher than the temperature of the molten tin or molten lead, e.g. 300? -400 ° C. The procedure is the same as for a heated furnace.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS859578A CS204434B1 (en) | 1978-12-20 | 1978-12-20 | Method of remedying power fallouts in melting channel of induction furnaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS859578A CS204434B1 (en) | 1978-12-20 | 1978-12-20 | Method of remedying power fallouts in melting channel of induction furnaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CS204434B1 true CS204434B1 (en) | 1981-04-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS859578A CS204434B1 (en) | 1978-12-20 | 1978-12-20 | Method of remedying power fallouts in melting channel of induction furnaces |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS204434B1 (en) |
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1978
- 1978-12-20 CS CS859578A patent/CS204434B1/en unknown
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