JPH02504065A - Furnace for preparing and dispensing alloys - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Furnace for preparing and dispensing alloys Technical field The present invention relates to nonferrous metallurgy, ferrous metallurgy, etc., and in particular, a furnace for preparing and distributing alloys with predetermined components. Regarding.

The present invention uses a reflective electric or gas-fired furnace to apply the electromagnetic effect of a magnetic field to a conductor. It is ideally used in the production of aluminum and its alloys to prepare and adjust the alloys of its components. Wear.

The invention can also be used in the production of copper, lead, magnesium, zinc, iron and other metals. Ru.

Background technology The quality of products made from metal alloys depends on the accuracy and desirability of the alloy composition. This is reflected in the desire for a minimum amount of impurities (e.g. oxides) that are not present. Of course Due to the strong interaction with the basic metal of the alloy, i.e. during the preparation process of the alloy. In order to increase the maximum temperature and extend the service life of the products made from it, Modifications and alloying additives can be quickly introduced into the alloy to obtain alloys with predetermined properties. The ability to enter is also required.

On the other hand, the rate of melting loss in the preparation process for preparing the alloy and the oxide inclusions in the final product are defective. % tends to increase.

Furthermore, the equipment commonly used today is not reliable enough and is difficult to prepare for alloy preparation. During maintenance and repair work, significant downtime is shown.

Fluid with one-sided inductor of running magnetic field giving non-contact variable application of the melt from the furnace A furnace (West German Patent No. 1 286 701) for preparing and distributing molten metal or Are known. The disadvantage of this known furnace is its low applicability for electromagnetic distribution of molten metals. Furthermore, the furnace has a narrow magnetic field, and the furnace has a long-term presence of alloy residue in the furnace. The method of preparation is not effective enough.

In addition, there is a refractory lining processing chamber enclosed within a metal jacket and a chamber located under the furnace dome. a heater located at the bottom of the processing compartment and a molten metal distribution diagonal pipe located at the bottom of the processing compartment. and a running magnetic field inductor placed outside the processing compartment along the metal tube. A furnace (Canadian Patent No. 1.085613) for preparing and dispensing alloys with It is being A partition is provided in the processing compartment above the metal tube in its longitudinal direction.

One wall of the compartment near the inductor is sloped and made of non-magnetic material. So The furnace can be operated in two ways. In other words, the method of stirring the molten metal in the furnace and its This method distributes molten metal from a furnace.

In the operation of the stirring type inductor, the direction of the traveling magnetic field is controlled from the distribution outlet to the furnace. zone, where the temperature difference between the surface layer of the molten metal and the bottom of the furnace is 150°C. temperature to several tens of degrees Celsius. The direction of the traveling magnetic waves is from the central zone of the furnace to the distribution outlet. The furnace operates in an alloy distribution mode. The disadvantage of this prior art furnace is the distribution When operated in the equation, considerable turbulence of the alloy in the distribution tube resulting from bubbling occurs This will destroy the continuity of the fill and promote oxidation of the alloy. The result As a result, when the furnace is operated in a distributed manner, the resulting ingot contains oxides, oxide films and other intervening materials. The quality is relatively poor due to the high content of impurities in the form of raw materials.

Disclosure of invention The purpose of the invention is to solve the problem of manufacturing a furnace for preparing and distributing alloys. Yes, in which the processing compartment can separate the steps of stirring and dispensing the molten metal or alloy. be constructed so as to significantly reduce the degree of oxidation of the metal or alloy as it is being dispensed from the furnace. I will do it.

The object of the invention is to provide a refractory lined processing chamber surrounded by a jacket and a furnace under the dome. a heater located at the bottom of the processing compartment and an inclined melt for molten metal distribution located at the bottom of the processing compartment. A molten metal tube, a partition that covers the molten metal tube at intervals and extends in the length direction of the molten metal tube, and with a traveling magnetic field inductor placed outside the processing compartment along the molten metal tube. In a furnace for preparing and dispensing alloys, said molten metal tubes are made of two The lower and upper blue lines extend at an obtuse angle (α) to each other, and the molten metal The partition covers the upper pipe system of the subordinate pipes, and the inductor covers each of the molten metal pipes. Prepare and separate the two-part alloy located below the lower and upper pipe systems. This is accomplished with a furnace installed.

The present invention thus separates the functions of stirring and dispensing the molten metal or alloy.

This consists of externally placed sections that selectively harvest sweetfish according to a predetermined method. By having a molten metal tube consisting of two blue runs covering a minute (apparatus) achieved.

Furthermore, this means that only one section of the inductor is operated in either manner. Power input can also be substantially reduced.

The present invention further improves the quality of finished products by reducing the amount of oxide inclusions. can be given.

Furthermore, loss of metal or alloy is reduced if breakage of the protection of the surface film is avoided.

Another advantage of the present invention is that it eliminates bubbling of the melt being dispensed in this furnace. Therefore, the accuracy of measuring the amount of dissolved matter increases.

In a preferred embodiment of the invention, the bottom of the partition is relative to the top run of the molten metal tube. extending at an angle, thereby widening the gap therebetween towards the bottom run of the tube.

This allows the energy of the molten metal vapor to be more fully utilized and distributed. The efficiency of the furnace increases.

Additionally, the angle of the bottom of the partition relative to the top run of the metal tube makes it difficult to The melt stream becomes thinner.

The inclination angle of the partition bottom with respect to the upper arm of the molten metal tube is 5-10°. is necessary. The angle selected in this range will minimize the hydraulic resistance in the molten metal tube. Ru.

According to one aspect of the invention, the metal jacket of the furnace in the region of the molten metal tube is made of non-magnetic material. Consists of two non-insulated liquid cooling radiators, one radiator between the other The plates of the two radiators are stored alternately to accommodate the two radiators. has an integrated structure.

The characteristics of its furnace design increase reliability by preventing molten metal from leaking out of the furnace. enhance Furthermore, this feature also prevents the refractory lining of the furnace ( lining) and thus the life of the furnace in general. Furthermore, the feature of this design is that the furnace Extend regular maintenance intervals.

Brief description of the drawing Other objects and advantages of the present invention will become apparent from the following description of embodiments thereof based on the accompanying drawings. Become.

FIG. 1 schematically shows an embodiment of the furnace of the present invention, and FIG. shows a more detailed cross-sectional view, FIG. 3 shows a more detailed cross-sectional view along the line l--l11 of FIG.

BEST MODE FOR CARRYING OUT THE INVENTION The furnace for preparing and distributing the alloy is enclosed in a metal jacket 2 with an inner refractory lining 3. It includes an enclosed processing chamber 1 (FIG. 1).

The heater 4 is installed under the dome of the furnace, and its bottom is connected to two pipe systems (run). ), i.e. it is made up of a bottom run 6 and an upper run, which extend at an obtuse angle α to each other. Money A partition 8 extending along the metallic tube 5 covers the upper ramp of the molten metal tube 5 at intervals. The lower part of the partition is located between the upper ramp of the metal tube 5 and the lower ramp of the metal tube 5. Tilt at an angle of β = 5° - 10° defining the upper arm (run) 7 extending towards the run 6. I'm there. An inductor 9 for creating a running magnetic field runs along the molten metal tube 5 into the processing chamber. It is provided outside of 1. The inductor 9 is divided into two separate parts 10.1 1, whose parts are respectively the lower run 6 and the upper run of the molten metal tube 5. Undertake.

In this embodiment, the jacket 2 in the area of the molten metal tube 5 consists of two liquid-cooled radiators of non-magnetic material. (Fig. 2, Fig. 3), showing the solid structure and alternating radiators. Each plate 14.15 of the radiator 12.13 insulates its radiator and Maybe one side wraps around the other. The radiators 12 and 13 are for example Ducts [6, 17 are provided for flowing liquid coolant.

The furnace has an inlet 18 (FIG. 1) and an outlet 19.

The disclosed furnace operates as follows.

Through inlet 18, melting is possible from an induction electrolyser (not shown) into the furnace. The charging material fills the processing chamber 1 with molten metal 20, operates the heater, and starts the melting process. , and the section 10 of the inductor 9 is also actuated from the inlet section 18 towards the center of the compartment 1. Create a magnetic field that travels. Stir the molten metal as shown vertically by arrow A in Figure 1. do.

Stirring uniformizes the 20 temperature of the molten metal and spreads the melt throughout the entire volume of processing compartment 1. Equalize the composition.

For a given adjusted melt, inductor 9 is actuated and the magnet made in section 10 The field is reversed, activating part 11 of inductor 9. Inductor 9 part 1 The travel of the magnetic field created in step 1 is directed from the center of processing chamber 1 to outlet 19, and the inductor added to the guided travel by the switched portion 10 of the motor 9. .

In this distribution configuration the molten metal flows along the metal tube 5 between the refractory lining 3 and the partition 8. Flow, prevent mixing of distributed melt and surface oxide film, improve quality of dispensing metal Ru. The molten metal is distributed (delivered) from outlet 19 in a uniform flow and free of oxides. Partition 8 is installed in an operating furnace for producing Silumin-type silicon-aluminum alloy. For example, it is made of corundum fireproof material. The width of the molten metal tube is equal to the width of the inductor 9. stomach.

Molten aluminum is injected into the furnace through an associated electrolyzer (not shown). , silicon is introduced into the processing chamber 1 via the inlet 18 . Activate heater 4. Portion 10 of inductor 9 also acts in the stirring direction. Stir the melted silicon. After about 15 minutes of agitation, the final alloy is ready for distribution and the inductor 9 Continue working on part 10 of . Then section 11 of inductor 9 is also actuated. The current force in part 10 is reversed and the current value in part 11 removes the prepared alloy from the furnace. Long controlled for distribution to continuous casting equipment.

Example 2 The aluminum charge is introduced into the processing compartment 1 of the furnace through the inlet 18 and the heater 4 Activate. The steel charge is charged into the furnace with molten aluminum and 4-5% copper is added. and produce an alloy of leftover aluminum. Melting work on part 10 of inductor 9 is activated at the time of starting to increase the dissolution rate, and then stirs and homogenizes the melt. Ru. Depending on the power of the furnace, the preparatory work for preparing the melt takes between 0.5 and 1 hour.

The lysate was distributed as described in Example 1 for the prepared lysate. Ru.

Industrial applicability The present invention is applicable to the production of aluminum and its alloys using an electric furnace or a gas combustion furnace. used.

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Claims (4)

[Claims] 1. Fireproof lining processing compartment (1) surrounded by jacket (2) and under the dome of the furnace a heater (4) placed at the bottom of the processing compartment (1) and a molten metal placed at the bottom of the processing compartment (1) an inclined molten metal tube (5) for distribution, covering said molten metal tube (5) at intervals and extending its length; A partition (8) extending in the horizontal direction and the processing compartment (1) along the molten metal tube (5) ) Adjust the alloy with the inductor (9) of the running magnetic field placed outside. In the furnace where Said molten metal pipe (5) is made from two pipe systems (6, 7), the lower and upper parts of which The pipe systems extend at an obtuse angle (α) to each other, and the upper pipe system ( 7) covered by the partition, and the inductor (9) is connected to each of the molten metal tubes (5). Two parts (10, 11) located below the lower and upper pipe systems (6, 7) A furnace for preparing and dispensing alloys. 2. The lower part of the partition (8) is connected to the upper pipe system (7) of the molten metal pipe (5). defining a gap extending at an angle (β) and widening towards the lower pipe system (6) of said melt tube (5); A furnace according to claim 1, characterized in that: 3. the lower part of said partition (8) to the upper pipe system (7) of said molten metal pipe (5); Furnace according to claim 2, characterized in that the angle of inclination (β) is 5-10°. 4. The jacket (2) in the region of the molten metal tube (5) is made of a non-magnetic material. Consisting of edge liquid cooling radiators (12, 13), the two radiators (12, 13) The respective plates (14, 15) are alternately received by the other one to form an integral structure. A furnace according to claim 1, characterized in that: