CN209740966U

CN209740966U - Hot-melting slag mineral wool electric furnace with condensing furnace lining

Info

Publication number: CN209740966U
Application number: CN201920587831.1U
Authority: CN
Inventors: 秦少辉
Original assignee: Zhengzhou Juda New Material Technology Co Ltd
Current assignee: Zhengzhou Juda New Material Technology Co Ltd
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2019-12-06
Anticipated expiration: 2029-04-26

Abstract

The utility model discloses a hot melt slag mineral wool electric stove that is equipped with condensation furnace wall is equipped with the condensation furnace wall in the hot melt slag mineral wool electric stove, the condensation furnace wall is from outer to interior for hugging closely the ramming material layer of furnace wall steel sheet and resistant firebrick and building the layer by laying bricks or stones, the coefficient of heat conductivity of ramming the material layer is about 6 w/m. ° C, the coefficient of heat conductivity of resistant firebrick building the layer is about 18 w/m. ° C, the furnace wall steel sheet is water-cooling intermediate layer steel sheet, and the cooling water flows in the steel sheet intermediate layer to take away the heat, play about the water-cooling, be equipped with tap hole and slag notch near the stove bottom position on the condensation furnace wall, tap hole and slag notch be the graphite body, whole big carbon brick of its overcoat is seted up tapping passageway and slag channel. The utility model discloses prolong the furnace lining life of hot melt slag mineral wool electric stove, reduced maintenance frequency and cost of maintenance, improved production efficiency, the performance of enterprises has obtained very big improvement.

Description

Hot-melting slag mineral wool electric furnace with condensing furnace lining

Technical Field

The utility model belongs to the technical field of mineral wool electric stove technique and specifically relates to a hot melt sediment mineral wool electric stove of condensation furnace wall is equipped with.

Background

The mineral wool electric furnace has the function of starting and stopping in the whole production system of mineral wool, is important equipment for quenching and tempering and heat supplementing and is also a carrier for slag fiber-forming cotton collection. Whether the mineral wool electric furnace can normally operate or not has great influence on the production of the whole mineral wool.

The mineral wool electric furnace mainly aims to control the slag temperature and the slag quantity of hot-melt slag conveyed to a centrifuge after the hot-melt slag is subjected to heat-supplementing acid-regulating smelting, and then a mineral wool board or loose wool is produced, wherein a furnace body is circular and is provided with a slag outlet and an iron outlet, the slag outlet capacity of the 5000KVA mineral wool furnace is about 4 tons/hour, the annual output can reach 2.5-3 ten thousand tons, and the iron outlet is used for discharging residual iron. The whole furnace body comprises the following components: the furnace comprises a furnace shell, a furnace cover, an electrode system, a short net, a hydraulic system, a cooling water system, a nitrogen protection system, a furnace lining refractory material and the like.

Where the refractory lining is the only place where external repairs cannot be made after damage and the furnace must be shut down for repair. After the production is put into once, the whole furnace lining can be repaired until the furnace is shut down, the maintenance period is short, namely, 7-10 days and 10-15 days, and the problem that the hot melting slag generated by blast furnace smelting cannot be recycled in time is caused for an enterprise with only one mineral wool electric furnace during the maintenance period. Therefore, the maintenance of the long service life of the refractory material of the mineral wool electric furnace lining is an important work, and the refractory material of the mineral wool electric furnace lining in the whole mineral wool production system is damaged by the high temperature erosion and the scouring of hot slag and the cold and hot generated by the lifting change of a slag line, so that the refractory material is damaged too fast, the furnace life is short and the continuous production cannot be realized.

SUMMERY OF THE UTILITY MODEL

The utility model provides a hot-melting slag mineral wool electric furnace with a condensing furnace lining, which aims to solve the problems that the service life of the furnace lining refractory material of the existing mineral wool electric furnace is short, the maintenance of the electric furnace is frequent, the furnace shutdown time is long, and the production is seriously influenced,

in order to achieve the above purpose, the utility model adopts the following technical scheme:

A condensation furnace lining is arranged in the furnace side of the hot-melting slag mineral wool electric furnace, the condensation furnace lining is a ramming material layer and a refractory brick masonry layer which are tightly attached to a furnace wall steel plate from outside to inside, the heat conductivity coefficient of the ramming material layer (2) is 5.7-6.2w/m DEG C, the heat conductivity coefficient of the refractory brick masonry layer (3) is 17.6-18.3w/m DEG C, the furnace wall steel plate is a water-cooling interlayer steel plate, cooling water flows in the steel plate interlayer and takes away heat to perform water cooling, an iron outlet and a slag outlet are arranged at positions close to the furnace bottom on the condensation furnace lining, the iron outlet and the slag outlet are both graphite bodies, and an integral large carbon brick is sleeved outside the iron outlet and the slag outlet channel is arranged in the iron outlet and the slag channel.

Preferably, the ramming material layer is a silicon carbide ramming material layer.

Preferably, the ramming material layer is internally provided with Y-shaped anchoring nails which are welded and connected with the furnace wall steel plate, and the Y-shaped anchoring nails are uniformly distributed.

Preferably, the refractory bricks of the refractory brick masonry layer are high-graphite silicon carbide bricks.

The condensed lining is named since it forms a skull between the lining material and the molten slag iron interface. To achieve this, the temperature of the thermal boundary layer must be well below the liquidus of the skull. If the shape and thickness of the skull is maintained at temperature for an extended period of time, the skull is the false lining that actually comes into contact with the slag iron. If any obstacle influencing the outward conduction of heat exists in the heat conduction process of the whole furnace wall, the heat is gathered at the slag shell, the temperature at the slag shell is increased, and the self state and the heat insulation effect are further damaged.

the condensing furnace lining is made of refractory material, and the furnace shell, the water cooling system and other systems are matched with each other under specific process conditions. Each part of the system is used for effectively transferring heat outwards so as to reduce the temperature of the system, and meanwhile, a layer of false furnace lining with high melting point is formed behind the refractory material and the melt, so that the refractory material is prevented from being thermally corroded, and the service life is prolonged.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a condensation furnace wall, the inside temperature distribution of furnace wall is less than with the temperature of position tradition heat preservation furnace wall, can effectually derive the heat outside the stove, has reduced the temperature of self, has improved life.

2. The utility model discloses very big extension hot melt slag mineral wool electric stove's furnace wall life, reduced maintenance frequency and cost of maintenance, improved production efficiency, the performance of enterprises has obtained very big improvement.

Drawings

Fig. 1 is a schematic sectional view of the present invention.

In the figure: 1-furnace wall steel plate, 2-ramming material layer, 3-refractory brick masonry layer, 4-tapping hole and 5-slag hole.

Detailed Description

The invention is further described with reference to the following figures and examples.

As shown in figure 1, the schematic diagram of the sectional structure of the hot-melting slag mineral wool electric furnace is that the furnace bottom of the mineral wool electric furnace still uses the conventional refractory material heat-insulating structure, specifically comprises a furnace bottom supporting steel plate, an asbestos plate, a light heat-insulating plate, high-alumina bricks, self-baking carbon bricks and cold ramming paste from bottom to top, a furnace wall comprises a water-cooling interlayer steel plate 1 which is filled with cooling water and an annular silicon carbide ramming material layer 2 which is close to the furnace wall steel plate 1 from outside to inside, y-shaped anchoring nails are uniformly welded on the inner wall of the furnace wall steel plate 1, the height of the Y-shaped anchoring nails is less than the thickness of the silicon carbide ramming material layer 2, an annular refractory brick layer 3 built by high-graphite silicon carbide bricks is arranged in the silicon carbide ramming material layer 2, an iron notch 4 and a slag notch 5 are arranged at the position close to the bottom of the furnace on a condensation furnace lining, the iron notch 4 and the slag notch 5 are both graphite bodies, and an integral large carbon brick is sleeved outside the graphite bodies to form an iron channel and a slag channel.

Wherein the heat conductivity coefficient of the silicon carbide ramming mass layer 2 is 6w/m DEG C, and the heat conductivity coefficient of the high-graphite silicon carbide brick layer 3 is 18w/m DEG C.

The high graphite silicon carbide brick masonry layer, the silicon carbide ramming layer and the water-cooling sandwich steel plate which is filled with cooling water of the mineral wool electric furnace form a complete structure of the condensing furnace lining. The principle is that effective cooling is combined with a furnace lining refractory material with good heat conductivity, so that the hot surface temperature of the refractory material is far lower than the reaction temperature of hot melt slag liquid, and thus, hot melt slag and the furnace wall refractory material are in contact with each other below a cold surface, impurities and metal generated in production are easily solidified on the hot melt slag and the furnace wall refractory material form a heat insulation layer. This also helps to keep the refractory in a lower temperature environment since the effective cooling leaves the hot surface of the refractory intact under the skull. Below the "critical reaction temperature" of the chemical reactions in the process. The chemical erosion mechanism of the refractory material is mainly dependent on the temperature. If the refractory temperature is maintained below the "critical" temperature of the reaction, then chemical reactions do not occur and so long as effective cooling is maintained, the temperature of the furnace wall refractory is reduced sufficiently to prevent chemical attack, which reduces refractory damage due to chemical attack and ensures furnace lining life.

The condensation furnace lining fully plays the role of a furnace body with a cooling water system, the heat conductivity coefficient of the refractory material of the condensation furnace lining is an important parameter index, and the heat conductivity coefficient of the refractory material of the condensation furnace lining can be neither too high nor too low, and the thickness of the furnace lining is reduced as much as possible after the refractory material with a certain heat conductivity coefficient is used, so that the phenomenon of slag adhering is ensured, and a false furnace lining is formed.

The mineral wool electric furnace of the same specification that does not adopt the condensation furnace lining at present, the life-span of its furnace lining refractory material, the shortest is about 7 days, and the longest also does not exceed 5 months, and most life-span is 1-2 months, adopts the utility model discloses a mineral wool electric furnace installs in Shanxi province somewhere, and its condensation furnace lining refractory material's life-span is the shortest also exceeds 8 months.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a hot melt sediment mineral wool electric stove of condensation furnace lining is equipped with, and the stove bottom of mineral wool electric stove is conventional refractory material insulation construction, specifically follows supreme stove bottom supporting steel plate, asbestos board, light heated board, high-alumina brick, self-baking carbon brick and cold ramming paste, its characterized in that of being down: the hot-melt slag mineral wool electric furnace is characterized in that a condensation furnace lining is arranged in the furnace side of the hot-melt slag mineral wool electric furnace, the condensation furnace lining is a ramming material layer (2) and a refractory brick masonry layer (3) which are tightly attached to a furnace wall steel plate (1) from outside to inside, the heat conductivity of the ramming material layer (2) is 5.7-6.2w/m DEG C, the heat conductivity of the refractory brick masonry layer (3) is 17.6-18.3w/m DEG C, the furnace wall steel plate (1) is a water-cooling interlayer steel plate, an iron outlet (4) and a slag outlet (5) are arranged on the condensation furnace lining at the position close to the furnace bottom, the iron outlet (4) and the slag outlet (5) are both graphite bodies, and a whole large carbon brick is sleeved outside the graphite bodies to form an iron outlet.

2. A hot melt slag mineral wool electric furnace with a condenser lining as claimed in claim 1, wherein: the ramming material layer (2) is a silicon carbide ramming material layer.

3. A hot melt slag mineral wool electric furnace with a condenser lining as claimed in claim 2, wherein: y-shaped anchoring nails which are connected with the furnace wall steel plate in a welding way are arranged in the ramming material layer (2), and the Y-shaped anchoring nails are uniformly distributed.

4. A hot-melt slag mineral wool electric furnace with a condenser lining according to claim 1, wherein: the refractory bricks of the refractory brick masonry layer (3) are high-graphite silicon carbide bricks.