CN212770886U - Anti-floating carbon key hearth of submerged arc furnace - Google Patents

Abstract

The utility model provides a hot stove in ore deposit is prevented floating carbon bond furnace hearth is provided with the tap hole on the furnace hearth, except the tap hole, the furnace hearth is from outer to interior in proper order for hugging closely the fire-resistant concrete of stove outer covering, high-alumina brick, low temperature coarse joint paste, the charcoal brick that the perps were built by laying bricks or stones, dovetail I has been seted up on the both sides facade of charcoal brick, and double dovetail I is constituteed to dovetail I of double-phase adjacent charcoal brick, is equipped with in the double dovetail I with the I corresponding carbon bond of double dovetail. The occurrence of iron penetration of the hearth carbon brick joints, the hearth opening brick joints, the carbon bricks and the hearth opening brick joints can be reduced or prevented, so that the service life of the hearth is prolonged.

Description

Anti-floating carbon key hearth of submerged arc furnace

Technical Field

The utility model relates to a hot stove hearth in ore deposit especially relates to a hot stove in ore deposit prevents floating carbon key hearth.

Background

The submerged arc furnace is also called electric arc furnace or resistance furnace. The method is mainly used for reducing and smelting ores, carbonaceous reducing agents, solvents and other raw materials. Mainly producing ferroalloys such as ferrosilicon, ferromanganese, ferrochromium, ferrotungsten, silicomanganese and the like. It features use of carbon or magnesium refractory as furnace lining and self-baking electrode. The electrodes are inserted into the charge to perform a submerged arc operation, and metal is melted by passing energy and current of the arc through the charge, generating energy due to the resistance of the charge. The working temperature of the submerged arc furnace is generally 1800-3500 ℃, and the long-time stable operation of the submerged arc furnace depends on the material and the structure of a furnace lining to a great extent.

In the prior submerged arc furnace lining structure, a furnace hearth is designed by sequentially filling a layer of refractory concrete in a furnace iron shell from outside to inside, building a ring or two rings of high-alumina bricks, and tamping a ring of carbon low-temperature coarse seam paste and a ring of carbon bricks or furnace mouth bricks in the high-alumina bricks.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a hot stove in ore deposit prevents floating carbon key hearth can reduce or prevent the emergence that hearth carbon brick built a seam, fire door brick built a seam, carbon brick and fire door brick built a seam and wear the iron to extension hearth life-span.

The technical scheme of the utility model is that: the utility model provides a hot stove in ore deposit prevents floating carbon key furnace hearth, is provided with tap hole 4 on the furnace hearth, except that the tap hole, the furnace hearth is the refractory concrete, high-alumina brick, low temperature coarse joint paste, the charcoal brick that the perps was built by laying bricks or stones that hug closely the stove outer covering from outside to inside in proper order, dovetail I has been seted up on the both sides facade of charcoal brick, and double dovetail I is constituteed to dovetail I of double-phase adjacent charcoal brick, is equipped with the carbon key corresponding with double dovetail I in the double dovetail I.

The taphole is provided with a furnace mouth brick; and a furnace mouth brick side vertical surface is adjacent to a carbon brick side vertical surface on the furnace cylinder ring surface, a dovetail groove II is formed on the furnace mouth brick side vertical surface and corresponds to the dovetail groove I, the dovetail groove I on the carbon brick and the dovetail groove II of the furnace mouth brick form a double dovetail groove II, and a carbon key corresponding to the double dovetail groove II is arranged in the double dovetail groove II.

The low-temperature thick seam paste is prepared by integrally knotting carbon cold ramming paste and silicon carbide materials, and the knotting thickness is 80 mm.

The high-alumina brick is a layer brick or a two-layer brick.

The number of the iron outlets is 1, 2, 3, 4 or 5, and the horizontal included angle between two adjacent iron outlets is 0, 90 or 180, 120 or 72 degrees.

The two tapholes are provided, and the horizontal included angle between the two tapholes is 90 degrees.

The refractory concrete can be phosphate refractory concrete, and the thickness can be 30-60 mm.

The carbon brick can be a half-graphite baked carbon brick, and the high-alumina brick is an Lz-75 high-alumina brick.

The beneficial effects of the utility model, the utility model provide a hot stove in ore deposit prevents floating carbon key furnace hearth sets up dovetail and carbon key between charcoal brick, the fire door brick built by laying bricks or stones at the perps, and the carbon key suits with two dovetail grooves to make the gap bending between carbon key and charcoal brick, the fire door brick crisscross, increased molten iron lateral flow's resistance. And utilize the charcoal key to link into whole respectively double-phase adjacent charcoal brick, double-phase adjacent furnace mouth brick, adjacent charcoal brick and furnace mouth brick of furnace hearth in this application, reduce or prevent the emergence of the iron is worn in the brick joint of furnace hearth charcoal brick, furnace mouth brick joint, charcoal brick and the brick joint of furnace mouth brick to prolong the life-span of furnace hearth.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a sectional view taken along the line A-A of the course of the charcoal bricks laid by the perps of FIG. 1.

Fig. 3 is an enlarged view of a portion B in fig. 2.

Detailed Description

As shown in fig. 1-3, a furnace hearth 1 of the anti-floating carbon key for the submerged arc furnace is provided with a tap hole 4, except for the tap hole, the furnace hearth 1 is sequentially provided with refractory concrete 10, high-alumina bricks 11, low-temperature rough joint paste 12 and carbon bricks 13 built by vertical joints from outside to inside, which are tightly attached to a furnace shell, dovetail grooves i 3 are arranged on the vertical surfaces of two sides of each carbon brick, dovetail grooves i of two adjacent carbon bricks form a double dovetail groove i, a connecting structure corresponding to the double dovetail grooves i is arranged in the double dovetail grooves i, and the connecting structure is called as a carbon key 5.

The vertical wall of the molten iron containing part is called a hearth in the application, and is a professional term in the metallurgical industry, and the hearth is the lower half part of the hearth in the application as can be seen from figure 1.

As shown in fig. 2, the taphole 4 is provided with a furnace mouth brick; on the ring surface of the furnace hearth, the side elevation of the furnace mouth brick is adjacent to the side elevation of the carbon brick 13 built by the vertical seams, a dovetail groove II is formed in the side elevation of the furnace mouth brick and corresponds to the dovetail groove I, the dovetail groove I on the carbon brick and the dovetail groove II of the furnace mouth brick form a double dovetail groove II, a connecting structure corresponding to the double dovetail groove II is arranged in the double dovetail groove II, and the connecting structure is called a carbon key 5.

The dovetail groove I is formed in the center of the side vertical face of the carbon brick.

If dovetail I is the groove that the cross section is isosceles trapezoid I, isosceles trapezoid I's last side length is 50mm, lower side length is 80mm, highly is 40mm, in building by laying bricks or stones the in-process, inlay corresponding carbon key in the two dovetail I that dovetail I of two adjacent carbon bricks is constituteed, the cross section of carbon key is the shape that two isosceles trapezoid II minor faces meet and form, two isosceles trapezoid II's last side length is 49mm, lower side length is 79mm, two isosceles trapezoid II's high sum is 79 mm.

If dovetail I is the groove that the cross section is isosceles trapezoid I, dovetail II is the groove that the cross section is isosceles trapezoid I, isosceles trapezoid I's last side length is 50mm, lower side length is 80mm, highly be 40mm, in building the in-process, inlay corresponding carbon key at two dovetail II that the dovetail I of double-phase adjacent carbon brick is constituteed, the cross section of carbon key is the shape that two isosceles trapezoid II minor faces meet and form, two isosceles trapezoid II's last side length is 49mm, lower side length is 79mm, two isosceles trapezoid II's high sum is 79 mm.

The low-temperature coarse seam paste 12 is prepared by integrally knotting carbon cold ramming paste and silicon carbide materials, and the knotting thickness is 60-100mm, preferably 80 mm. The thickness of the low-temperature rough joint paste is the distance between the adjacent high-alumina bricks 11 and the carbon bricks 13 built by the vertical joints inside and outside the low-temperature rough joint paste.

The high-alumina brick 11 is a one-layer brick or a two-layer brick. For example, the hearth is annular, and the high-alumina brick 11 layer of high-alumina brick forms a layer of high-alumina brick ring.

The number of the iron outlets 4 is 1, 2, 3, 4 or 5, and the horizontal included angle between two adjacent iron outlets is 0, 90 or 180, 120 or 72 degrees. As shown in fig. 2, there are two tapholes 2, and the horizontal included angle between the two tapholes is 90 degrees.

The refractory concrete 10 may be phosphate refractory concrete and may have a thickness of 30-60 mm. Here, the thickness of the refractory concrete 10 is in the same direction or in parallel with the thickness of the low-temperature caulk 12.

The carbon brick 13 can be a half-graphite baked carbon brick, and the high-alumina brick is an Lz-75 high-alumina brick.

The utility model provides a hot stove in ore deposit is prevented floating carbon key furnace hearth sets up dovetail and carbon key between charcoal brick, the fire door brick built by laying bricks or stones of perps, and the carbon key suits with two dovetail grooves to make the gap bending between carbon key and charcoal brick, the fire door brick crisscross, increased molten iron lateral flow's resistance. And utilize the charcoal key to link into whole respectively double-phase adjacent charcoal brick, double-phase adjacent furnace mouth brick, adjacent charcoal brick and furnace mouth brick of furnace hearth in this application, reduce or prevent the emergence of the iron is worn in the brick joint of furnace hearth charcoal brick, furnace mouth brick joint, charcoal brick and the brick joint of furnace mouth brick to prolong the life-span of furnace hearth.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the general inventive concept, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.

Claims (8)

1. The utility model provides a hot stove in ore deposit prevents floating carbon key stove jar which characterized in that: the furnace hearth is provided with a tap hole, except the tap hole, the furnace hearth is sequentially provided with refractory concrete, high-alumina bricks, low-temperature coarse joint paste and carbon bricks built by vertical joints, which are tightly attached to a furnace shell, from outside to inside, two side vertical faces of the carbon bricks are provided with dovetail grooves I, the dovetail grooves I of two adjacent carbon bricks form a double dovetail groove I, and carbon keys corresponding to the double dovetail groove I are arranged in the double dovetail groove I.

2. The anti-floating carbon key hearth of the submerged arc furnace as claimed in claim 1, wherein: the taphole is provided with a furnace mouth brick; and a furnace mouth brick side vertical surface is adjacent to a carbon brick side vertical surface on the furnace cylinder ring surface, a dovetail groove II is formed on the furnace mouth brick side vertical surface and corresponds to the dovetail groove I, the dovetail groove I on the carbon brick and the dovetail groove II of the furnace mouth brick form a double dovetail groove II, and a carbon key corresponding to the double dovetail groove II is arranged in the double dovetail groove II.

3. The anti-floating carbon key hearth of the submerged arc furnace as claimed in claim 1, wherein: the thickness of the low-temperature coarse joint paste is 80 mm.

4. The anti-floating carbon key hearth of the submerged arc furnace as claimed in claim 1, wherein: the high-alumina brick is a layer brick or a two-layer brick.

5. The anti-floating carbon key hearth of the submerged arc furnace as claimed in claim 1, wherein: the number of the iron outlets is 1, 2, 3, 4 or 5, and the horizontal included angle between two adjacent iron outlets is 0, 90, 180, 120 or 72 degrees.

6. The anti-floating carbon key hearth of the submerged arc furnace as claimed in claim 5, wherein: the two tapholes are provided, and the horizontal included angle between the two tapholes is 90 degrees.

7. The anti-floating carbon key hearth of the submerged arc furnace as claimed in claim 1, wherein: the refractory concrete is phosphate refractory concrete with a thickness of 30-60 mm.

8. The anti-floating carbon key hearth of the submerged arc furnace as claimed in claim 1, wherein: the carbon brick is a half-graphite baked carbon brick, and the high-alumina brick is an Lz-75 high-alumina brick.

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