CN201680726U - Rotary single-phase electric arc furnace - Google Patents

Abstract

The utility model relates to a rotary single-phase electric arc furnace which comprises an electrode, a cover plate, a heat insulating material, a crucible with a tail part, filler, a fire-proof material, an outer shell, an insulated sleeve, a bolt, a rotating shaft and a support part. The furnace is characterized in that only one electrode is inserted in and the crucible with the tail part serves as the other electrode; consequently, the utilized space of a hearth can be enlarged by one time, the manufacturing is convenient and the crucible is easy to replace; and the furnace is applicable to multi-factor tests, all specimens do not pollute one another, and the test results are kept correct. The electrode is arranged on a hand-operated lifter, the lifting is very convenient, the furnace body can rotate up and down on a support, so that an experiment product is convenient to take out, and the crucible is convenient to clean and replace.

Description

Rotatable single-phase electric arc furnace

technical field

The utility model relates to a single-phase electric arc furnace.

Background technique

An electric arc furnace is an electric furnace that smelts ores and metals at high temperatures generated by electrode arcs. For smelting metals, the electric arc furnace is more flexible than other smelting furnaces. It can effectively remove impurities such as sulfur and phosphorus. The furnace temperature is easy to control and the equipment occupies a small area. Electric arc furnaces can be divided into three-phase electric arc furnaces, consumable electric arc furnaces, single-phase electric arc furnaces and resistance electric arc furnaces according to the arc form.

Many fields require the use of electric arc furnaces to achieve material melting, taking the preparation of rare earth alloys as an example. Yttrium-based heavy rare earth ferrosilicon alloy is a good magnesium-free cast iron nodulizer. It can not only save metal magnesium, but also greatly improve the working conditions. What's more valuable is that this nodulizer has excellent anti-spheroid recession ability. It is used in Large section ductile iron parts and assembly line. It has been found that in addition to yttrium, which accounts for about 50% of the total amount of rare earth elements, there are nearly 40% of other heavy rare earth elements. In order to find out how much effect these other heavy rare earths besides yttrium can have on the nodularizing effect of cast iron, or have other application fields, each single heavy rare earth alloy must be developed and tested, and single-phase electric arc furnace heating is required during the test molten.

At present, the single-phase electric arc furnace, which is the stereotyped equipment, has the following disadvantages and is not suitable for testing: the equipment is expensive, the sample container is not easy to replace, the furnace space is small, the cost of raw materials for each test is large, and the pollution between the furnaces is easy to affect. test results.

Utility model content

The purpose of this utility model is to provide a single-phase electric arc furnace that effectively improves the utilization rate of the furnace space, greatly saves raw materials, reduces the cost of experiments, facilitates the removal of experimental products, and facilitates the cleaning and replacement of crucibles.

The utility model designs a rotatable single-phase electric arc furnace, which includes a furnace body and an electrode 1. The special feature is that the furnace body is provided with a tailed crucible 4, a filler 5, and a refractory material 6 sequentially from the inside to the outside. , shell 7; the top of the body of furnace is provided with cover plate 2, insulation material 3 successively from top to bottom; Described electrode 1 is inserted in the crucible 4 with tail; The tail-like protrusion runs through the refractory material 6 and the shell 7 and extends out of the shell 7, and an insulating sleeve 8 is provided on the outer circumference of the tail-like protrusion;

Further, the tailed crucible 4 is used as the first electrode, and the electrode 1 is used as the second electrode; that is to say: the tailed crucible 4 itself is used as an electrode (lower electrode), and the inserted electrode 1 is another electrode (upper electrode), Compared with the double-electrode electric arc furnace, the utilization space of the furnace can be doubled.

Further, the electrode 1 is installed on the lifter, and the lifting is very convenient. Lifters can be hand cranked or electric.

Furthermore, the furnace body can be rotated up and down on the support 11, the experimental product can be taken out easily, and the crucible can be cleaned and replaced easily. When the furnace body is rotated 180 degrees downward, all experimental products can be easily taken out.

Further, the electrode 1 is made of molybdenum or graphite.

Further, asbestos or glass wool is selected as the thermal insulation material 3 .

Further, the material of the tailed crucible 4 is graphite, and the tail-like protrusion is used as the joint of the first electrode. The manufacturing cost of the crucible with tail is very low, and it is easy to replace. Therefore, in the multi-factor test, one crucible can be used for each sample, so as to prevent mutual contamination and keep the test result correct.

Further, the bracket 11 is Λ-shaped or Π-shaped.

Further, the melting temperature is adjusted by controlling the secondary voltage and current.

Further, the secondary voltage used is 21-25V, and the secondary current is 1000-1500A.

The size of the electric arc furnace can be determined by the test personnel according to the test requirements.

Description of drawings

Figure 1 is a schematic diagram of a rotatable single-phase electric arc furnace body.

Fig. 2 is a front view of the assembly of the rotatable single-phase electric arc furnace body and support in one embodiment, and Fig. 3 and Fig. 4 are the corresponding left side view and top view respectively.

Fig. 5 is an assembly front view of the rotatable single-phase electric arc furnace body and support in another embodiment, and Fig. 6 and Fig. 7 are the corresponding left side view and top view respectively.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

Example 1

A rotatable single-phase electric arc furnace includes component electrodes 1, cover plate 2, insulation material 3, tailed crucible 4, filler 5, refractory material 6, shell 7, insulating sleeve 8, bolt 9, shaft 10 and bracket 11. The furnace body is provided with tailed crucible 4, filling material 5, refractory material 6, and shell 7 sequentially from inside to outside; the top of the furnace body is provided with cover plate 2 and insulation material 3 in sequence from top to bottom; Insert into the tailed crucible 4; a tail-like protrusion is provided at the bottom of the tailed crucible 4, the tail-like protrusion penetrates the refractory material 6 and the shell 7 and extends out of the shell 7, and the outer circumference of the tail-like protrusion is provided with The insulating sleeve 8; the furnace body is fixed on the support 11 through the bolt 9 and the rotating shaft 10. The tailed crucible 4 is used as the first electrode, and the electrode 1 is used as the second electrode, that is to say: the tailed crucible 4 itself is used as one electrode, and the inserted electrode 1 is used as the other electrode. The material of the tailed crucible 4 is graphite, and the tail-like protrusion is used as the joint of the first electrode, that is to say: the lower part has the tail-like protrusion as the joint of an electrode. Electrode 1 is installed on the lifter. The furnace body can rotate up and down on the support 11. The electrode 1 is made of molybdenum. Thermal insulation material 3 selects asbestos for use. Support 11 is Λ type.

Electric arc furnace body size and structure:

1. Furnace body size: outer diameter: 400 mm, depth: 450 mm;

Crucible with tail: inner diameter: 100mm;

Depth: 170mm;

Diameter of the upper electrode: Φ55mm, diameter of the lower electrode (that is, the tail part of the crucible): Φ80mm.

2. Transformer capacity: 40-50kw;

Secondary voltage: 21-35v;

Secondary current: 1100A.

3. Furnace structure and masonry:

Furnace shell: 5 mm steel plate, 12 mm asbestos board for insulation layer;

Asbestos boards are laid on the insulation bricks for furnace bottom insulation with a thickness of 45 mm;

The furnace shell and the tailed crucible are filled with refractory material and bonded with water glass;

There is an alloy outlet on the upper part of the furnace, and the furnace cover is a movable asbestos board.

Example 2

Rotatable single-phase electric arc furnace, including electrode 1, cover plate 2, insulation material 3, tailed crucible 4, filler 5, refractory material 6, shell 7, insulating sleeve 8, bolt 9, rotating shaft 10 and bracket 11 components. The tailed crucible 4 itself serves as one electrode, and the inserted electrode 1 serves as the other electrode. The material of the tailed crucible 4 is graphite, and the lower part has a tail-like protrusion, which is used as a joint of an electrode. Electrode 1 is installed on the lifter. The furnace body can rotate up and down on the support 11. The electrode 1 is made of graphite. Thermal insulation material 3 selects glass wool for use. The bracket 11 is Π-shaped.

Electric arc furnace body size and structure:

1. Furnace body size: outer diameter: 400 mm, depth: 450 mm;

Crucible with tail: inner diameter: 100mm;

Depth: 170mm;

Diameter of the upper electrode: Φ55mm, diameter of the lower electrode (that is, the tail part of the crucible): Φ80mm.

2. Transformer capacity: 40-50kw;

Secondary voltage: 21-35v;

Secondary current: 1100A.

3. Furnace structure and masonry:

Furnace shell: 5 mm steel plate, 12 mm glass wool board for insulation layer;

Glass wool boards are laid on the insulation bricks for furnace bottom insulation with a thickness of 45mm;

The furnace shell and the tailed crucible are filled with refractory material and bonded with water glass;

There is an alloy outlet on the upper part of the furnace, and the furnace cover is a movable glass wool board.

Claims (8)

1. a rotatable single-phase arc funace comprises body of heater and electrode (1), it is characterized in that: described body of heater is provided with magnetic tape trailer crucible (4), filler (5), refractory material (6), shell (7) from the inside to the outside successively; The top of body of heater is provided with cover plate (2), insulation material (3) from top to bottom successively; Described electrode (1) inserts in the magnetic tape trailer crucible (4); Bottom at described magnetic tape trailer crucible (4) is provided with the shape of tail projection, and described shape of tail projection is through refractory material (6) and shell (7) and extend shell (7), is provided with insulating sleeve (8) at the excircle of shape of tail projection; Described body of heater is fixed on the support (11) by bolt (9) and rotating shaft (10).

2. rotatable single-phase arc funace as claimed in claim 1 is characterized in that: described magnetic tape trailer crucible (4) is as first electrode, and electrode (1) is as second electrode.

3. rotatable single-phase arc funace as claimed in claim 1 is characterized in that: electrode (1) is installed on the lifter.

4. rotatable single-phase arc funace as claimed in claim 1 is characterized in that: described electrode (1) material is selected molybdenum or graphite for use.

5. rotatable single-phase arc funace as claimed in claim 1 is characterized in that: described insulation material (3) is selected asbestos or mineral wool for use.

6. rotatable single-phase arc funace as claimed in claim 1 is characterized in that: the selected material of described magnetic tape trailer crucible (4) is a graphite, and described shape of tail projection is as the joint of first electrode.

7. rotatable single-phase arc funace as claimed in claim 1 is characterized in that: described support (11) is Λ type or ∏ type.

8. rotatable single-phase arc funace as claimed in claim 7 is characterized in that: use secondary voltage to be 21-25V, secondary current is 1000-1500A.

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