CN212538733U - Novel electric arc furnace - Google Patents

Abstract

The utility model discloses a novel electric arc furnace, including furnace body, furnace lining and bell and pass the bell and put into the electrode heating device in the furnace body, the furnace body includes the furnace pit, be equipped with first protrusion on the furnace pit, the slag notch that is equipped with in the first protrusion, the slag removal passageway is located to the furnace pit upper end, the slag removal passageway with the slag notch link up, be equipped with the slot along the vertical direction of first protrusion, be equipped with the closing plate that is used for blocking the slagging tap in the slot, the closing plate is connected with cylinder one; the furnace comprises a furnace tank, a liquid containing cavity, a liquid outlet, a preheating mechanism and a waste gas treatment mechanism, wherein a second protrusion is arranged on the left side of the upper portion of the furnace tank and formed by building the second protrusion and the furnace tank integrally, the liquid containing cavity is reserved in the second protrusion, and the preheating mechanism and the waste gas treatment mechanism are further included. The utility model discloses the cost has been practiced thrift to the high heat utilization rate, has secondly guaranteed the purity of solution in the stove.

Description

Novel electric arc furnace

Technical Field

The utility model relates to a smelt electric arc furnace, concretely relates to novel electric arc furnace.

Background

The electric arc furnace is a common device in the metallurgical industry, and is essentially an electric arc furnace adopting an eccentric bottom tapping method, which is called an EBT electric arc furnace for short. Which has a number of advantages. For example: tapping is carried out at the bottom of the furnace, so that the tapping temperature is reduced, and the power consumption is saved; reduction of secondary oxidation, improvement of steel quality, and the like are generally used.

However, the furnace door of the existing electric arc furnace, namely, the two sides of the furnace door at the slag discharging position, are damaged prematurely due to the radiation of the flowing slag and the electric arc light, so that the service life of the whole electric arc furnace is shortened, and the continuous operation performance of the electric arc furnace is seriously influenced; and thirdly, in the later liquid outlet stage of the liquid outlet of the existing electric arc furnace, the slag at the upper end of the solution can flow out along with the solution, so that the quality of the slag-free steel outlet is seriously influenced. For this reason, it is necessary to improve the prior art to solve the above technical problems.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a novel electric arc furnace. The method is realized by the following scheme:

the utility model discloses a novel electric arc furnace, include furnace body, furnace lining and bell and pass the bell and put into the electrode heating device in the furnace body, the furnace body includes the furnace pit, furnace pit upper portion right is equipped with first protrusion, the slag notch that is equipped with in the first protrusion, furnace pit upper end locate the slagging-off passageway, the slagging-off passageway with the slag notch link up, be equipped with the slot along first protrusion vertical direction, be equipped with the closing plate that is used for blocking the slagging tap in the slot, the closing plate is connected with cylinder one, first protrusion outwards extends 400-; a second bulge is arranged on the left side of the upper part of the furnace hearth and is integrally built with the furnace hearth, a liquid containing cavity is reserved in the second bulge, a liquid outlet is arranged at the lower end of the liquid containing cavity, an opening and closing mechanism is arranged at the lower end of the liquid outlet, a blocking wall is arranged on the right side of the liquid containing cavity, the blocking wall extends downwards, and a space is reserved at the bottom of the furnace hearth; still including being located the preheating cabinet of bell top, the preheating cabinet includes a trapezoidal frame, sliding connection in the fork body, the one end of trapezoidal frame lower extreme articulate in the straight line drive component of fork body one end in trapezoidal frame upper end, the fork body is equipped with the gyro wheel with trapezoidal frame slip department, the preheating cabinet upper end is equipped with an automatic sealed lid of opening, the preheating cabinet upper end is equipped with a dust excluding hood, the dust excluding hood both sides are through dust removal union coupling in exhaust-gas treatment tower.

The preferred scheme is as follows: a hollow rod piece is arranged between the sealing plate and the first cylinder, and the rod piece comprises a heat insulation rod and a water cooling rod from bottom to top; the lower end of the water cooling rod is provided with a water inlet, the upper end of the water cooling rod is provided with a water outlet, and the water inlet and the water outlet are connected to a cooling liquid supply device.

The preferred scheme is as follows: the deslagging channel comprises a slag collecting platform on the upper edge of the furnace tank and used for blocking solution, and an arc-shaped culvert which is positioned on the furnace lining and connected with the slag collecting platform, wherein the culvert is flat up and down.

The preferred scheme is as follows: the slag notch is the rectangle slag notch, the interior border department of rectangle slag notch is equipped with the chamfer.

The utility model has the advantages that:

1. the utility model discloses preheat the waste material swift, need not complicated structure, need not pipeline secondary and carry the heat, heat utilization rate is higher and secondary pollution, improves production efficiency and has practiced thrift the cost.

2. The structure that has changed the furnace gate has adopted first protrusion and slagging-off passageway to replace, and the discharge of slag-tap is favorable to controlling to a pair of slag notch opening and closing control of cooperation cylinder, has guaranteed the purity of solution in the stove.

3. First protrusion draws slag notch and slagging-off passageway to keeping away from electric arc radiation department for the refractory material of slag notch department avoids electric arc radiation to influence, has greatly improved the life-span of this part.

Other advantages of the present invention will be further explained in the detailed description of the embodiments.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the furnace body;

fig. 3 is a schematic view of a deslagging channel.

Detailed Description

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in the figure: a novel electric arc furnace comprises a furnace body 1, a furnace lining 2, a furnace cover 3 and an electrode heating device 4, wherein the electrode heating device 4 penetrates through the furnace cover 3 and is placed into the furnace body 1, the furnace body 1 comprises a furnace pool 5, a first bulge 6 is arranged on the right side of the upper portion of the furnace pool 5, a slag outlet 7 is formed in the first bulge 6, a slag removing channel 20 is arranged at the upper end of the furnace pool 5, the slag removing channel 20 is communicated with the slag outlet 7, a slot is formed in the vertical direction of the first bulge 6, a sealing plate 8 used for blocking slag discharging is arranged in the slot, and the sealing plate 8 is connected with a first cylinder 14; the furnace hearth 5 upper portion left side is equipped with second protrusion 9, second protrusion 9 is built by laying bricks or stones with furnace hearth 5 an organic whole and is formed, reserve out in the second protrusion 9 and hold sap cavity 10, it is equipped with a liquid outlet 11 to hold sap cavity 10 lower extreme, liquid outlet 11 lower extreme is equipped with closing mechanism 12, it is equipped with on 10 right in sap cavity and blocks wall 13 to hold, it leaves the interval to block wall 13 downwardly extending and furnace hearth 5 bottom. Further, if necessary, a hollow rod is arranged between the sealing plate 8 and the cylinder I14, and the rod comprises a heat insulation rod 15 and a water cooling rod 16 from bottom to top; the lower end of the water cooling rod 16 is provided with a water inlet 17, the upper end of the water cooling rod is provided with a water outlet 18, and the water inlet 17 and the water outlet 18 are connected to a cooling liquid supply device 19, so that overheating damage to the first air cylinder 14 is prevented.

Before tapping, namely before opening the tap hole, the first starting cylinder 14 is lifted up by the sealing plate 8, so that the slag flows through the slag removing channel 20 and is discharged out of the furnace body 1 from the slag hole 7, and preferably, the slag removing channel 20 comprises a slag collecting platform 21 for blocking solution on the upper edge of the furnace tank 5 and an arc-shaped culvert 22 which is positioned on the furnace lining 2 and connected with the slag collecting platform 21. Due to the presence of this step of the slag collection table 21, a thin layer of slag remains above the solution to meet the process requirements. Preferentially, slag notch 7 is rectangle slag notch 7, the interior border department of rectangle slag notch 7 is equipped with the chamfer. Rectangle slag notch 7 cooperation circular-arc culvert 22 makes whole slagging-off passageway 20 comparatively flat, forms when the slag flows out to spread out equally fast like waterfall, compares and opens too high slag notch 7 from top to bottom, has avoided useless open region, consequently the utility model discloses guaranteed under the prerequisite of discharge capacity that the heat is not wasted. Further, before the tapping hole is opened, the furnace is inclined to the tapping hole side by about 3 to 5 degrees to form a sufficient hydrostatic pressure, and then the opening and closing mechanism 12 is used to siphon the solution in the furnace tank 5 below the slag into the solution containing chamber 10 and out of the solution outlet 11. When liquid outlet 11 goes out to about 95% when the molten steel, because the utility model discloses set up and blockked wall 13, at this moment arbitrary to floating on the slag on the solution have reliable effect of blockking, greatly reduced the slag and brought the condition into the ladle by the solution, be favorable to metallurgical quality's promotion. Further, a preheating box 23 is arranged above the furnace cover, the preheating box comprises a ladder-shaped frame 24, a fork body 25 connected with the lower end of the ladder-shaped frame 24 in a sliding manner, one end of the fork body is hinged with one end of the fork body 25 and hinged with a linear driving element 26 at the upper end of the ladder-shaped frame, a roller (not marked in the figure) is arranged at the sliding position of the fork body and the ladder-shaped frame, the upper end of the preheating box 23 is provided with a sealing cover 27 capable of being opened automatically, the upper end of the preheating box is provided with a dust hood 28, and two sides of the dust hood 28 are connected with a waste gas. Under the condition that the electrode works uninterruptedly, the sealing plate is opened, and the waste materials are arranged in the sealing box, so that heat in the furnace body flows into the sealing box through the gap of the fork body to preheat the waste materials, a heat source is fully utilized, and the processing cost is saved. The waste heat escaping after the sealing cover 27 is opened is collected by the dust collecting hood and is prevented from being polluted by the waste gas treatment tower 29, which is beneficial to environmental protection.

Preferably, the first protrusion 6 extends outwardly 400-600 mm. The first bay 6 enables the tapping hole 7 and the deslagging channel 20 to be led away from the arc radiation, and the change of the structure enables the refractory material at the tapping hole 7 to be free from the arc radiation, so that the service life of the part is greatly prolonged.

Claims (4)

1. The utility model provides a novel electric arc furnace, includes furnace body, furnace lining and bell and passes the bell and put into the electrode heating device in the furnace body which characterized in that: the furnace body comprises a furnace tank, a first protrusion is arranged on the right side of the upper part of the furnace tank, a slag outlet is formed in the first protrusion, a slag removing channel is arranged at the upper end of the furnace tank and is communicated with the slag outlet, a slot is formed in the vertical direction of the first protrusion, a sealing plate for blocking slag is arranged in the slot, the sealing plate is connected with a first air cylinder, and the first protrusion extends outwards for 400 mm and 600mm relative to the outer wall of the furnace body; a second bulge is arranged on the left side of the upper part of the furnace hearth and is integrally built with the furnace hearth, a liquid containing cavity is reserved in the second bulge, a liquid outlet is arranged at the lower end of the liquid containing cavity, an opening and closing mechanism is arranged at the lower end of the liquid outlet, a blocking wall is arranged on the right side of the liquid containing cavity, the blocking wall extends downwards, and a space is reserved at the bottom of the furnace hearth; still including being located the preheating cabinet of bell top, the preheating cabinet includes a trapezoidal frame, sliding connection in the fork body, the one end of trapezoidal frame lower extreme articulate in the straight line drive component of fork body one end in trapezoidal frame upper end, the fork body is equipped with the gyro wheel with trapezoidal frame slip department, the preheating cabinet upper end is equipped with an automatic sealed lid of opening, the preheating cabinet upper end is equipped with a dust excluding hood, the dust excluding hood both sides are through dust removal union coupling in exhaust-gas treatment tower.

2. The new electric arc furnace of claim 1, characterized in that: a hollow rod piece is arranged between the sealing plate and the first cylinder, and the rod piece comprises a heat insulation rod and a water cooling rod from bottom to top; the lower end of the water cooling rod is provided with a water inlet, the upper end of the water cooling rod is provided with a water outlet, and the water inlet and the water outlet are connected to a cooling liquid supply device.

3. The new electric arc furnace of claim 1, characterized in that: the deslagging channel comprises a slag collecting platform on the upper edge of the furnace tank and used for blocking solution, and an arc-shaped culvert which is positioned on the furnace lining and connected with the slag collecting platform, wherein the culvert is flat up and down.

4. The new electric arc furnace of claim 3, characterized in that: the slag notch is the rectangle slag notch, the interior border department of rectangle slag notch is equipped with the chamfer.

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