CN2935054Y

CN2935054Y - Multi-layer covered core induction main frequency furnace

Info

Publication number: CN2935054Y
Application number: CN 200620105438
Authority: CN
Inventors: 陈行满; 杨建国
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-07-07
Filing date: 2006-07-07
Publication date: 2007-08-15
Anticipated expiration: 2016-07-07

Abstract

The utility model discloses a multilayer covered cored induction main frequency furnace to smelt copper and copper alloy, which comprises a furnace casing (1), a furnace lining (2), a ring hearth (3), an iron core (4) and an induction coil (5). Metal bars (7) are inserted on both sides of the ring hearth (3) below the rock bottom of middle hole of the ring hearth. Melting point and density of the metal bars (7) are higher than those of the ring hearth (3); flake graphite (9) and xylanthrax coating (10) are provided on molten metal (8) to be smelted. The utility model eliminates the defects of breaking and clogging of the ring hearth and hydrogen brittleness of metallic materials, and the ring hearth can heat and smelt metals without failure all along. The utility model has the advantages of simple structure and low cost, and metallic material processed by the ring hearth contains very little oxygen; combination properties of the metallic material, strength in particular, are remarkably improved; processability of the utility model is greatly improved and service life is prolonged.

Description

The multilayer cover type has core induction main frequency furnace

One, technical field

The utility model relates to a kind ofly can have a core induction main frequency furnace to what copper and alloy thereof carried out melting.

Two, background technology

It is method of smelting commonly used at present that application has core induction main frequency furnace that copper and alloy thereof are carried out melting, is used widely.Existing have core induction main frequency furnace mainly to be made of parts such as furnace shell, furnace lining, channel, iron core, induction coils, wherein channel be use with the copper of institute melting and alloy phase thereof with the becket (solid) that forms of pouring metal melt, new channel (using for the first time) is called the channel model.Its operation principle is: main frequency furnace energising after-current enters induction coil, because electromagnetic induction makes channel inside produce very big electric current, and makes channel heating fusing.Produce electromagnetic pressure simultaneously the channel molten metal fierceness that has melted is stirred, thereby make the heat energy in the channel pass to whole stove rapidly, finally make copper and alloy melting thereof in the stove.

But the problem that the melting of above-mentioned main frequency furnace exists has: the disconnected ditch phenomenon of channel, easily take place in one.This is that air is easy to be sucked by the channel molten metal and makes channel contain air during owing to melting, just can occur the disconnected ditch phenomenon of channel when treating to rise again the stove heating.Its two, the channel clogging easily takes place.This be since the material purity of channel model not enough due to.Just impurity is more inadequately for purity, and the channel model is when the heating fusing, and these impurity are concentrated in and occur clogging together.Its three, metal material " hydrogen embrittlement " phenomenon easily takes place.Along with the molten metal in the stove is constantly drawn, air also is easy to be sucked by molten metal, makes to contain a certain amount of oxygen (≤0.003%) in the metal material that makes.This metal material at high temperature is easy to generate oxidation Asia (Cu with the oxygen reaction ₂O), this cuprous oxide (Cu ₂O) also following chemical reaction: Cu can take place with airborne hydrogen under reducing atmosphere and hot conditions ₂O+H ₂=2Cu+H ₂O, its reaction product water (H ₂O) meeting is vaporized and is caused the metal material breakage under hot conditions, and so-called " hydrogen embrittlement " phenomenon promptly takes place.

These disconnected ditches, clogging, the capital does not plan a successor the channel (or channel model) in the fusing and can not turn-on current, make its fusing of can not generating heat, cause whole induction furnace to be scrapped, stove be must tear open and former channel (stove cooling generally need 2 to 3 days) and the new channel of brickwork use again taken out, cause the waste on temporal loss and the fund, increased the melting cost." hydrogen embrittlement " phenomenon can cause metal material to have defectives such as crackle, pore even fracture, thereby has shortened the service life of metal material.

Three, utility model content

The purpose of this utility model is to overcome above-mentioned deficiency, and provides a kind of generate heat all the time fusing transferring heat energy, the extremely low multilayer cover type of metal material oxygen content that makes of channel that can make that core induction main frequency furnace is arranged.

The purpose of this utility model realizes by following technical solution: a kind of multilayer cover type has core induction main frequency furnace, comprise furnace shell, furnace lining, channel, iron core, induction coil, both sides at described channel body are inserted with metal bar, and the degree of depth that metal bar inserts is that the fusing point of metal bar, density all are higher than fusing point, the density of channel below the plane at minimum point place of channel interstitial hole; On the molten metal of institute's melting, be provided with graphite phosphorus sheet and charcoal cover layer.

After adopting the utility model structure, when disconnected ditch or clogging appearred in channel in the process of fusing, because its both sides are inserted with metal bar, this metal bar still can make the channel turn-on current of disconnected ditch or obstruction and the fusing transferring heat energy of generating heat.Simultaneously, owing on molten metal, covered graphite phosphorus sheet and charcoal cover layer, isolated contacting of molten metal and air well, and graphite phosphorus sheet can also with metal oxide generation chemical reaction, make the oxygen content considerably less (only being about 0.0008%) in the metal material that makes.Therefore, the utility model compared with prior art, the channel fusing operate as normal of generating heat all the time during work of this channel induction furnace, metal bar can repeated multiple times use, have advantage simple in structure, that cost is low, and eliminated " hydrogen embrittlement " phenomenon of metal material, make the metal material combination property that makes particularly intensity be significantly improved, improve the processing characteristics of metal material greatly, prolonged the service life of metal material.

Four, description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail.

Fig. 1 has the structural representation of core induction main frequency furnace and use thereof for the utility model multilayer cover type.

Five, the specific embodiment

With reference to Fig. 1 as can be known, the utility model multilayer cover type has core induction main frequency furnace, comprise furnace shell 1, furnace lining 2, channel 3, iron core 4, induction coil 5, water collar 6, both sides at described channel 3 bodies are inserted with metal bar 7, and the degree of depth that metal bar 7 inserts is below the plane at minimum point place of channel interstitial hole, fusing point, density that the fusing point of metal bar 7 (can not melted simultaneously), density (can not float during melting) all are higher than channel 3 are (generally speaking, the resistivity of metal bar will be higher than the resistivity of channel, but its electric conductivity will be got well); On the molten metal 8 of institute's melting, be provided with graphite phosphorus sheet 9, charcoal cover layer 10.

Wherein, when metal bar is installed and to be provided with, generally will carry out certain bending (its flexibility decides according to the channel size) earlier to an end of the metal bar that inserts, be below the plane at minimum point place of channel body interstitial hole with the degree of depth that makes things convenient for metal bar to insert.Can go up at molten metal (being copper liquid) and cover graphite phosphorus sheet earlier, establish the charcoal cover layer again; Also can on molten metal, establish the charcoal cover layer earlier and then establish graphite phosphorus sheet.Furnace lining can adopt the quartz sand material, is located in the furnace shell and the periphery of water collar; Channel among the figure has been in molten state, fuses into one with copper liquid, and in order to express clearly the profile of channel, profile when channel is solid-state has just drawn.

During the channel fusing, at first fusing bottom, slowly up fusing then, in the fusion process, the air or the impurity that are present in wherein can build up together, make not plan a successor between the molten metal melted and the unfused channel, thereby disconnected ditch or clogging take place channel.And the metal bar that inserts has played the connection effect to the tomography of channel just, makes channel still can continue heating fusing transferring heat energy.But insert when in fusion process, pulling out during metal bar.

Though established the double-deck material of charcoal cover layer and graphite phosphorus sheet on the molten metal, isolated contacting of molten metal and air well, airborne micro amount of oxygen still might be penetrated in the molten metal, generates cuprous oxide Cu with metal reaction ₂O.At this moment, following chemical reaction: 5Cu can take place with cuprous oxide in graphite phosphorus sheet ₂O+2P=10Cu+P ₂O ₅↑, its product P ₂O ₅Be the volatilizable effusion of gas.Therefore, the oxygen content in the metal material that makes is considerably less, and this can be described as " multilayer covers the deoxidation method ".

Claims

1, a kind of multilayer cover type has core induction main frequency furnace, comprise furnace shell (1), furnace lining (2), channel (3), iron core (4), induction coil (5), it is characterized in that: the both sides at described channel (3) body are inserted with metal bar (7), and the degree of depth that metal bar (7) inserts is that the fusing point of metal bar (7), density all are higher than fusing point, the density of channel (3) below the plane at minimum point place of channel interstitial hole; On the molten metal (8) of institute's melting, be provided with graphite phosphorus sheet (9), charcoal cover layer (10).