CN2145661Y

CN2145661Y - Secondary heating device for horizontal continuously casting industion furnace

Info

Publication number: CN2145661Y
Application number: CN 92235454
Authority: CN
Inventors: 李晓谦
Original assignee: Central South University
Current assignee: Central South University
Priority date: 1992-12-08
Filing date: 1992-12-08
Publication date: 1993-11-10
Anticipated expiration: 2002-12-08

Abstract

The utility model relates to a secondary heating device for a horizontal continuously casting induction furnace, which heats a casting pipe and molten metal in the casting pipe by arranging an annular heating element at the outer part of the outlet end of a graphite casting pipe positioned between a hearth and a crystallizer. Thereby, when entering the crystallizer, the molten metal still has better fluidity and does not enhance the furnace temperature, which reduces the heat insulation power of the main furnace and the energy consumption, and also reduces the volatilization loss of zinc in the process of smelting. The utility model has the advantages of simple structure and relative independence, and can be replaced at the hot state.

Description

Secondary heating device for horizontal continuously casting industion furnace

The utility model relates to a kind of metal material continuous casting equipment.

Adopting electric induction furnace is a kind of common methods in copper coin, band, tube, rod section, the wire production as the horizontal continuous casing of melting and heat preservation stove.Its structure of the continuous casting installation for casting that is adopted is that crystallizer is directly installed on the electric induction furnace, and molten metal gate spool by a complete closed in the burner hearth flows directly into crystallizer to avoid the secondary oxidation phenomenon of casting process.Though this production equipment has thermal efficiency height, and is simple in structure, easy to maintenance, reliable, advantage such as production cost is low, but molten metal flow to crystallizer from burner hearth must be through the lower furnace wall that builds up by refractory brick and quartz sand of temperature, thermal loss is bigger, and temperature obviously reduces.Still have good mobility when guaranteeing that molten metal enters crystallizer, must improve furnace temperature, brought following problem and improve furnace temperature:

(1) energy consumption increases;

(2) volatilization loss of low-melting alloy element zinc etc. increases;

(3) the molten metal inspiratory capacity increases, and makes oxygen content increase in the ingot casting, and defectives such as pore increase.

In order to guarantee under the prerequisite that does not improve furnace temperature that molten metal still has good mobility when flowing into crystallizer, the special the utility model that proposes.

The utility model is achieved in that additional second heating apparatus in existing electric induction furnace front.Specific practice is:, make molten metal enter crystallizer and obtain heating for the second time before from the annular heating element heater of gate spool outer setting between the burner hearth inflow crystallizer at molten metal, the temperature that reduces or eliminates molten metal reduces.The annular heating element heater is stratie or inductive heating element.

Figure 1 shows that a kind of embodiment of the present utility model, the thermal insulating cover 2 of the square-outside and round-inside of making by insulating refractories one of the port of export outer setting of graphite gate spool 1, in this thermal insulating cover 2, an annular heating element heater made from graphite material--carbon pipe 3 is installed, the end cylindrical of carbon pipe 3 matches with the endoporus of thermal insulating cover 2, and their outer face is by insulation thermal insulation board 5 location that are installed on the stokehold cover plate 4.After opening stokehold cover plate 4, carbon pipe 3 can be removed or pack into very easily.End upper and lower at thermal insulating cover 2 respectively has an aperture, and upper and

lower electrode assembly

6,7 links to each other with carbon pipe 3 by these two holes respectively.Electrode the 6, the 7th, but the hollow copper tubing of water flowing cooling, cooling water by water nozzle 8 into and out of.Above thermal insulating cover 2 aperture is arranged in addition, feeder 9 extend in the thermal insulating cover by this hole.Can or vacuumize to supplying nitrogen in the thermal insulating cover by this device, prevent graphite component oxidations at high temperature such as blocking pipe, gate spool.Crystallizer is installed on the pouring tube outlet end, and links with bolt and stokehold cover plate.

Description of drawings: Fig. 1 is the utility model section of structure, wherein the 10-burner hearth.

The advantage of this device

(1) adopts this device, can reduce or eliminate molten metal and flow to the temperature reduction that the thermal loss the crystallizer process causes from burner hearth by the electric induction furnace furnace wall, thereby can lower the heating-up temperature of burner hearth inner metal liquid, reduce the melting and heat preservation power of main stove, total energy consumption reduces 5%;

(2) because furnace temperature is lower, the volatilization loss of zinc when having reduced alloys such as melting brass;

(3) content of gases such as oxygen, hydrogen significantly reduces along with the reduction of molten metal temperature in the molten metal, for casting provides good conditions such as the high-quality strand of this class of oxygen-free copper bar;

(4) this device can improve the solidification and crystallization behavior of molten metal in crystallizer, and the liquid cave is shoaled, and has reduced the possibility of defectives such as slag inclusion, shrinkage cavity, deviation in the strand;

(5) this device has relative independentability.When elements such as the carbon pipe in this device, electrode, valve need be changed, can wait stove to cool down, change fast hot.

Claims

1, a kind of horizontal continuous casting electric induction furnace second heating apparatus, it is characterized in that: there is an annular heating element heater that is installed in the muff port of export outside at the graphite gate spool that connects electric induction furnace burner hearth and crystallizer.

2, heater according to claim 1 is characterized in that: the carbon pipe of annular heating element heater for making with graphite material.

3, heater according to claim 1 and 2 is characterized in that: the end cylindrical of heating element heater carbon pipe matches with the endoporus of the muff of square-outside and round-inside, and their outer face is by the insulation thermal insulation board location that is installed on the cover plate of stokehold.

4, heater according to claim 1 and 2 is characterized in that: respectively have an electrode assembly to link to each other with heating element heater carbon pipe by the hole that is positioned on the muff at the end of muff upper and lower.

5, heater according to claim 1 and 2 is characterized in that: having a feeder to extend into the thermal insulating cover by the hole that is positioned on the muff above the muff.