CN217520246U - Electric melting furnace with double molten liquid flow openings - Google Patents

Abstract

The utility model relates to a two meltwater fluid mouths electric melting furnace and rock wool fibre production system belongs to rock wool production facility field. Its technical scheme does, a two melt fluid mouth electric melting furnaces, including the furnace body, the inside of furnace body is furnace, is equipped with clear stove slag notch, iron liquor export, vice iron liquor export and two rock wool melt outlets on the lateral wall of furnace body, and two rock wool melt outlet levels set up side by side, and vice iron liquor export sets up side by side with iron liquor outlet level. The utility model has the advantages that the double rock wool melting liquid outlets are adapted to the rock wool production requirements with high power and large yield, so as to ensure the rock wool melting liquid fluid to be uniform and the flow to be stable, and the iron liquid outlet is matched with the auxiliary iron liquid outlet, so as to ensure the optimal use effect of iron discharging control in the design operation maintenance period of the electric melting furnace under large yield; can ensure the long-term stable operation production and greatly improve the production efficiency of producing rock wool by using the electric melting process.

Description

Electric melting furnace with double molten liquid flow openings

Technical Field

The utility model relates to a rock wool production facility field especially relates to a two meltwater fluid ports electric melting furnace.

Background

Rock wool is a high-quality heat-insulating and fireproof material, and is widely applied to the fields of industry, agriculture, buildings, ships and the like.

The cupola furnace adopts a hot air combustion-supporting melting technology, namely hot air obtained by exchanging tail gas of the cupola furnace with cold air is used as combustion-supporting gas, and the method is simple, but has a plurality of problems: because the oxygen content of the air can not meet the production requirement, the temperature rise speed in the furnace is slow, and the fuel is not combusted sufficiently, so that the gas content of CO and the like in the furnace is high, and the produced rock wool fiber is short and short, and has poor flexibility and elasticity; the raw materials used in the cupola process are basalt, dolomite and other ores, the raw materials are blocky, the ores fall from the top of the cupola, the melting temperature of the cupola is not easy to accurately control, sometimes, the melt is not uniform to produce slag, and generally, the raw material consumption and the product ratio of the cupola are 1.4: 1, the combustion heat efficiency of the cupola furnace is only 40-45%, and raw materials and fuel are seriously wasted; most importantly, coke cupola furnaces have been totally out of service due to environmental requirements, and natural gas has been limited as a fuel.

Therefore, more and more manufacturers adopt the production process of the electric melting furnace, and at present, the electric arc furnace is mainly adopted for producing rock wool. However, because the arc striking in the three-phase electrodes of the arc furnace is inconsistent, the instantaneous three-phase current is unbalanced, the electric network is greatly impacted, higher harmonics are generated to influence the safe operation of the electric network, the existing production of rock wool mostly adopts a common power arc furnace, the production capacity is low, the melting amount is only 3-6 tons per hour, and the one-time investment rate is relatively high. The inventor has previously developed an electric stove quick ignition device, and the ignition is fast, and three phase current is balanced, does not have electric melting furnace and the corresponding ignition start method of impact to the electric wire netting to apply for the patent of publication No. CN210635886U, CN110360594B, make to utilize high power electric melting furnace to produce rock wool to make possible, current electric melting furnace no longer satisfies the output demand under the ordinary power.

Disclosure of Invention

The utility model discloses to the problem that present ordinary power electric melting furnace production rock wool output is low, provide one kind can the higher power of adaptation, the higher two meltwater fluid ports electric melting furnace of output, the adaptation binary directly links the frequency conversion four-roller fiber forming centrifuge production rock wool fibre.

The utility model discloses a technical scheme do, a two meltwater fluid mouth electric melting furnaces, including the furnace body, the inside of furnace body is furnace, is equipped with on the lateral wall of furnace body and clears away stove slag notch, iron liquid export, vice iron liquid export and two rock wool meltwater exports, and two rock wool meltwater export levels set up side by side, and vice iron liquid export sets up side by side with iron liquid export level. The double rock wool melt outlets are matched with the rock wool production requirements with high power and large yield, so that the output rock wool melt is uniform in fluid and stable in flow, redundant iron in the red mud can be recovered under the condition that the rock wool melt is not influenced to flow out, the iron liquid outlet is matched with the auxiliary iron liquid outlet so as to ensure the optimal use effect of controllable iron in the design operation maintenance period of the electric melting furnace under large yield, the furnace cleaning slag outlet is arranged, and the fluid melt and residues in the furnace can be thoroughly discharged when the electric melting furnace needs to be shut down for maintenance, so that the furnace is convenient to clean and maintain; can ensure the long-term stable operation production and greatly improve the production efficiency of producing rock wool by using the electric melting process.

Preferably, the vertical height of the rock wool molten liquid outlet from the bottom surface of the hearth is 45-60cm, and the diameter is 10-15 cm; the vertical height between the molten iron outlet and the auxiliary molten iron outlet and the bottom surface of the hearth is 8-15cm, and the diameter is 7-10 cm; the horizontal position of the slag outlet of the furnace cleaning is not higher than the bottom surface of the hearth, and the diameter is 7-15 cm.

Preferably, the included angle between the rock wool molten liquid outlet and the iron liquid outlet along the circumferential direction of the furnace body is 85-95 degrees, the included angle between the rock wool molten liquid outlet and the slag outlet of the furnace cleaning along the circumferential direction of the furnace body is 175-180 degrees, the axes of the two rock wool molten liquid outlets are parallel, and the distance is 80-150 cm; two auxiliary molten iron outlets are arranged, the two auxiliary molten iron outlets are respectively positioned on two sides of the molten iron outlet, and the distance between the auxiliary molten iron outlet and the molten iron outlet is 20-50 cm.

Preferably, the furnace body comprises a furnace shell, and a heat insulation layer, a heat preservation layer, an anti-oxidation layer and a working layer are sequentially arranged inside the furnace shell from outside to inside.

Preferably, the heat insulation layer is a fireproof heat insulation plate; the heat insulation layer is a ramming pouring layer formed by mixing clay brick crushed aggregates and borax; the anti-oxidation layer is a high-alumina brick; the working layer comprises an upper working layer and a lower working layer, the upper working layer is made of high-alumina bricks, the lower working layer is made of high-magnesia bricks, and the boundary between the upper working layer and the lower working layer is matched with the set rock wool molten liquid level height in the hearth.

Preferably, the thickness of the heat insulating layer is 4-10 cm; the thickness of the heat-insulating layer is 20-30 cm; the thickness of the anti-oxidation layer is 30-40 cm; the thickness of the working layer is 110-130 cm.

The heat insulating layer reduces heat exchange inside and outside the furnace body, reduces heat loss through the outside of the furnace, can maintain the temperature inside the hearth, fully absorbs and utilizes heat, the oxidation resistant layer and the working layer select high-alumina bricks and high-magnesium bricks according to the high corrosion characteristic of red mud ingredients in a high-temperature melting state, simultaneously the high-alumina bricks with relatively low cost are used for the melting liquid level in the working layer, the temperature below the melting liquid level is relatively high, the high-magnesium bricks with corrosion resistance, high temperature resistance and relatively high cost are selected, the thermal expansion coefficient is low, the thermal shock resistance is good, the temperature resistance strength is high, the high-alumina bricks and the high-magnesium bricks are not softened after being used for a long time at high temperature, the high-alkali resistance is good, the high-alumina bricks and the high-slag cannot corrode, the thickened working layer can prolong the continuous working time and the maintenance period of the electric melting furnace, the high-alumina and high-magnesium refractory bricks are selected as the working layer furnace lining, and the electric melting furnace can run under the conditions of long-term high-temperature melting and high alkali liquor even if a small amount of high-alumina bricks, The high-magnesium bricks are corroded to just supplement the aluminum and magnesium contents in the red mud batching ball blocks.

Preferably, the stove outer covering includes outer steel sheet and inlayer steel sheet, is equipped with between outer steel sheet and the inlayer steel sheet and is connected the gusset, has certain interval between outer steel sheet and the inlayer steel sheet, and the intercommunication has the cooling water in the interval, and the water-cooled furnace lid that the top of cooperation furnace body was equipped with, the furnace body carries out initiative water-cooling, guarantees the production security.

Preferably, the thickness of the outer layer steel plate is 10-15cm, the thickness of the inner layer steel plate is 15-20cm, and the interval between the outer layer steel plate and the inner layer steel plate is 5-10mm, so that a cooling water channel is formed.

Preferably, a furnace base is arranged below the furnace body, the furnace base comprises a concrete platform, a certain number of I-shaped steels are horizontally arranged on the concrete platform, the furnace body is erected on the top surfaces of the I-shaped steels, and the bottom surface of the furnace body is a steel plate. A good air channel can be formed through the I-steel bent frame, a cooling structure can be further arranged between the I-steels to cool the bottom of the furnace, and the outer shell of the melting furnace is physically and electrically isolated from the outside.

Preferably, the electric melting furnace further comprises:

the graphite electrode comprises three graphite electrodes, the upper ends of the graphite electrodes are connected with a three-phase electrode holder, the lower ends of the graphite electrodes are inserted into a hearth, the three-phase electrode holder comprises a lifting device and an electrode cross arm, one end of the electrode cross arm is connected with the lifting device, the other end of the electrode cross arm fixes the graphite electrodes through an electrode holder holding ring, the electrode holder holding ring is used for conducting ceramic spraying treatment, the electrode cross arm adopts a copper-steel composite conductive cross arm, and a water cooling structure is arranged inside the electrode cross arm; the depth of the electrode inserted into the molten liquid can be controlled, the electrode loss can be supplemented, and the power can be adjusted or maintained.

A material distribution device: the material distribution device is matched with a material distribution port positioned at the top of the furnace body, a first weighing device is arranged at the bottom of the furnace body and electrically connected with the material distribution device, the first weighing device is used for detecting the whole weight of the furnace body and controlling the material feeding of the material distribution device, and the material distribution device comprises a second weighing device used for controlling the material feeding amount of the material distribution device;

a double-body direct-connected variable-frequency four-roller fiber-forming centrifuge and a fiber-forming cotton collecting drum: the double-body direct-connected variable-frequency four-roller fiber-forming centrifugal machine adopts a variable-frequency motor direct-connected technology, and the rotating speed of a centrifugal roller is 8000 rpm; the diameter of the fiber-forming cotton collecting drum is not less than 5m, the effective width of the screen plate is not less than 2m, the fiber-forming cotton collecting drum is provided with a movable high-pressure water gun and a blow-drying air knife, the movable high-pressure water gun is used for cleaning the surface of the drum, and the blow-drying air knife is used for cleaning cotton wool in holes of the screen plate and drying accumulated water on the surface of the drum; is suitable for a production system with large capacity.

The stokehole ladle is matched with the molten iron outlet and/or the auxiliary molten iron outlet;

the cooling water circulation system provides circulating cooling water for a furnace shell of the furnace body, the water-cooled furnace cover and the three-phase motor holder;

a pit is arranged below a field where a rock wool molten liquid outlet is located, a swing drainage groove is formed in the rock wool molten liquid outlet, the fixed end of the swing drainage groove is located below the rock wool molten liquid outlet, the swing end of the swing drainage groove can be switched between a first set position and a second set position in a swing mode, and when the swing end is located at the first set position, the swing drainage groove is matched with a two-body direct-connection variable-frequency four-roll fiber forming centrifugal machine; when the swing end is located at the second set position, the swing drainage groove is matched with the pit, and the furnace cleaning slag outlet is matched with the pit. The steady operation of electric melting furnace should be guaranteed in process of production, avoids power change or opens repeatedly and stop, when other equipment such as fibre-forming device overhauls, for keeping electric melting furnace power stable, through swing drainage groove with the leading-in pit of melt, guarantees the continuous operation of electric melting furnace, avoids power change, makes the production beat more stable.

Can find out through above technical scheme, the utility model has the advantages of: the electric melting furnace is designed for producing rock wool by utilizing red mud, can run at high power and large melting amount, has double rock wool melt outlets and large rock wool fiber yield, and can run stably for a long time, a plate-type water-cooled furnace shell, a furnace bottom plate, furnace bottom I-shaped steel, a furnace body rib plate, an iron outlet, a rock wool melt outlet, a slag outlet and the like adopted by a furnace body are welded by boiler steel in a special way, and the furnace body is provided with a weighing device, a temperature measuring device and the like; the furnace shell contains refractory and heat-insulating materials such as high-alumina bricks, high-magnesia bricks, heat-insulating layers, high-alumina cotton boards and the like; the melting amount is designed to be 12 tons per hour, and an internal hearth is cylindrical; the high-thickness high-magnesium bricks and the high-aluminum bricks are used as the working layer furnace lining, so that the corrosion resistance of the electric melting furnace lining under the high-temperature and high-alkaline working conditions of the red mud is greatly improved, the aluminum and magnesium contents in molten liquid are improved even if trace corrosion occurs, and meanwhile, the electric melting furnace has a heat insulation layer and a heat preservation layer, so that the heat utilization rate of the electric melting furnace is improved, and the electric melting furnace is more efficient and energy-saving; the electric melting furnace is provided with a plurality of molten iron outlets, so that the best use effect of controllable iron discharging in the design operation maintenance period of the electric melting furnace under large yield is ensured, and the furnace cleaning slag outlet is arranged, so that the molten fluid and residues in the furnace can be thoroughly discharged when the electric melting furnace needs to be stopped for maintenance, and the furnace is convenient to clean and maintain; the utility model provides a two meltwater fluid mouths electric melting furnace production efficiency is high, and output is big, and long-time operation is stable, and complete sets investment cost, running cost, environmental protection cost, the aspect such as output all are superior to cupola and ordinary electric melting furnace.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic top view of a dual port electric melter according to an embodiment of the present invention.

FIG. 2 is a schematic front view of an electric melting furnace with two melt ports according to an embodiment of the present invention.

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

Fig. 4 is a first schematic view of the rock wool fiber production system according to the embodiment of the present invention.

Fig. 5 is a schematic diagram of a rock wool fiber production system according to an embodiment of the present invention.

In the figure: 1. the device comprises a furnace body, 2 parts of a rock wool molten liquid outlet, 3 parts of an iron liquid outlet, 4 parts of a furnace cleaning slag outlet, 5 parts of an auxiliary iron liquid outlet, 6 parts of a furnace shell, 7 parts of a heat insulation layer, 9 parts of an oxidation resistant layer, 10 parts of a working layer, 10-1 parts of an upper working layer, 10-2 parts of a lower working layer, 11 parts of a concrete platform, 12 parts of I-steel, 13 parts of a water-cooled furnace cover, 14 parts of a distributing device, 15 parts of a furnace front ladle, 16 parts of a distributing port, 17 parts of a swinging drainage groove, 18 parts of a pit, 19 parts of a double-body direct-connection variable-frequency four-roller fiber forming centrifugal machine, 20 parts of a fiber forming and cotton collecting drum, 21 parts of a graphite electrode, 22 parts of a lifting device, 23 parts of an electrode cross arm, 24 parts of an electrode holding ring and 25 parts of rock wool molten liquid.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments, and obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of protection of this patent.

As shown in fig. 1 and 2, the electric melting furnace with double melt fluid ports comprises a furnace body 1, the diameter of the furnace body is 7 meters, the height of a furnace shell is 5.6 meters, a water-cooled furnace cover 13 is arranged at the top of the furnace body 1, a cylindrical hearth is arranged inside the furnace body 1, a furnace cleaning slag outlet 4, an iron liquid outlet 3, two auxiliary iron liquid outlets 5 and two rock wool melt outlets 2 are arranged on the side wall of the furnace body 1, the vertical height of the rock wool melt outlets 2 from the bottom surface of the hearth is 45-60cm, namely d2 in fig. 2 is 45-60cm, the diameter is 10-15cm, water-cooled launders are arranged below the rock wool melt outlets 2, the two rock wool melt outlets 2 are horizontally arranged in parallel, the axes are parallel, and the horizontal distance is 80-150 cm; an included angle between the iron liquid outlet 3 and the rock wool molten liquid outlet 2 along the circumferential direction of the furnace body 1 is 85-95 degrees, two auxiliary iron liquid outlets 5 are respectively positioned at two sides of the iron liquid outlet 3, the auxiliary iron liquid outlets 5 and the iron liquid outlet 3 are horizontally arranged in parallel, the diameters of the iron liquid outlet 3 and the auxiliary iron liquid outlet 5 are both 7-10cm, the distance between the iron liquid outlet 3 and the auxiliary iron liquid outlet 5 is 20-50cm, the vertical height from the bottom surface of the furnace hearth is 8-15cm, namely d1 in the graph 2 is 8-15 cm; the included angle between the furnace cleaning slag outlet 4 and the rock wool molten liquid outlet 2 along the circumferential direction of the furnace body 1 is 175-180 degrees, the diameter of the furnace cleaning slag outlet 4 is 7-15cm, and the horizontal position of the furnace cleaning slag outlet is not higher than the bottom surface of the hearth; when the slag outlet and the auxiliary molten iron outlet are not used, the slag outlet and the auxiliary molten iron outlet are blocked by using the silica powder, the slag outlet or the molten iron outlet can be drilled by a drilling machine, and the silica powder is used for blocking after the slag outlet is finished; a temperature measuring device is arranged at the outlet of the rock wool melt.

The water-cooled furnace cover is also called a smoke cover, is a device for collecting and discharging smoke and furnace dust generated in the smelting process of the electric furnace, and is also a place for charging materials. The smoke hood adopts a closed short smoke hood, and a smoke hood cover plate can be manufactured in a split mode and is installed after being transported to a site; it is composed of water-cooled steel skeleton, water-cooled cover plate and side wall. The framework and the top cover are both water-cooled and are connected with a distribution valve of an open circulating water cooling system of the furnace body water cooling system, and high-alumina refractory castable is sprayed on the distribution valve. The smoke cover is 62cm high and is provided with three small observation doors. The top of the smoke hood is provided with three electrodes, a charging hole and a dedusting smoke pipe. The smoke hood is of a circular structure, the non-magnetic stainless steel is adopted to manufacture the water cooling plate within 40cm of the outside of the pole center circle at the top of the smoke hood, the common molten steel cooling plate is adopted at the outer ring, and the refractory castable is knotted at the lower part.

As shown in fig. 3, the furnace body 1 comprises a furnace shell 6, and a heat insulation layer 7, a heat preservation layer 8, an oxidation resistance layer 9 and a working layer 10 are sequentially arranged inside the furnace shell 6 from outside to inside:

the furnace shell 6 comprises an outer layer steel plate and an inner layer steel plate, a connecting rib plate is arranged between the outer layer steel plate and the inner layer steel plate, the thickness of the outer layer steel plate is 10-15cm, the thickness of the inner layer steel plate is 15-20cm, the interval between the outer layer steel plate and the inner layer steel plate is 5-10mm, cooling water is introduced into the interval, the surface of the furnace body is actively cooled through the water-cooled furnace shell and the water-cooled furnace cover, and the heat transfer to the environment is reduced;

the heat insulation layer 7 is a fireproof heat insulation plate, is preferably made of a high-density alumina fiber board, has the thickness of 4-10cm, and has the functions of reducing heat loss passing through the furnace bottom and outwards from the periphery and insulating the cooling function of the water cooling furnace shell;

the heat-insulating layer 8 is prepared by mixing clay brick crushed aggregates with a small amount of borax and water to prepare a casting material with the humidity of 10-12%, and casting and ramming, and the thickness is 20-30 cm;

the antioxidation layer 9 is made of high-alumina bricks by ring building, crushed materials which are the same as the high-alumina bricks are filled in brick joints, a small amount of borax and water are added to adjust the crushed materials into wet mud with the humidity of 15-25%, the wet mud is fed into the brick joints and tamped, and the thickness of the antioxidation layer is 30-40 cm;

the working layer 10 is divided into an upper working layer 10-1 and a lower working layer 10-2, the boundary of the upper working layer 10-1 and the lower working layer 10-2 is positioned at the liquid level of rock wool molten liquid above 25cm, the temperature of the upper working layer is relatively low, high-alumina bricks with strong oxidation resistance are selected for being annularly built, brick joints are transversely and vertically crossed when the high-alumina bricks are built, and the brick joint gaps are filled with wet mud materials with the humidity of 15-25% and formed by adding a small amount of borax and water into crushed materials with the same material as the high-alumina bricks; the lower working layer 10-2 is relatively high in temperature and is made of high-magnesium bricks through ring building, the gaps between the brick joints are filled and fed with wet mud materials with the humidity of 15-25% which are prepared by adding a small amount of borax and water into crushed materials of the same materials as the high-magnesium bricks, and the thickness of the upper working layer 10-1 is the same as that of the lower working layer 10-2 and is 110-130 cm.

The furnace base is arranged below the furnace body 1 and comprises a concrete platform 11, a certain number of I-shaped steel 12 are horizontally arranged on the concrete platform 11, the furnace body 1 is erected on the top surface of the I-shaped steel 12, the bottom surface of the furnace body 1 is a steel plate, a good air channel can be formed through an I-shaped steel bent frame, a cooling structure can be further arranged between the I-shaped steel to cool the furnace bottom, and the physical isolation and the insulation isolation between a melting furnace outer shell and the outside are facilitated.

The above-mentioned dual-port electric melting furnace is further provided with the following structure:

the top of the electric melting furnace is provided with three high-power graphite electrodes 21, the upper ends of the graphite electrodes 21 are connected with a three-phase electrode holder, the lower ends of the graphite electrodes 21 are inserted into a hearth, the three-phase electrode holder comprises a lifting device 22 and an electrode cross arm 23, the lifting device 22 is preferably a hydraulic cylinder, one end of the electrode cross arm 23 is connected with the lifting device 22, the other end of the electrode cross arm 23 fixes the graphite electrodes 21 through an electrode holder holding ring 24, the electrode holder holding ring 24 is used for ceramic spraying treatment, the electrode cross arm 23 is a copper-steel composite conductive cross arm, the insulation performance is stable in a thermal working state, the electrode cross arm 23 is a copper-steel composite conductive cross arm, and a water cooling structure is arranged inside the electrode cross arm 23;

the material distribution device 14: the material distribution device 14 is matched with a material distribution port 16 positioned at the top of the furnace body 1, a first weighing device is arranged at the bottom of the furnace body 1 and electrically connected with the material distribution device 14, the first weighing device is used for detecting the overall weight of the furnace body 1 and controlling the material feeding of the material distribution device 14, the material distribution device 14 comprises a second weighing device, and the second weighing device is used for controlling the material feeding amount of the material distribution device;

the fiber forming device comprises a double-body direct-connection variable-frequency four-roller fiber forming centrifugal machine 19 and a fiber forming cotton collecting drum 20:

the double-body direct-connected variable-frequency four-roller fiber forming centrifuge is a high-yield fiber forming centrifuge, adopts four rollers for forming fibers, increases the productivity, increases the diameters of the 1# roller and the 2# roller, adopts a variable-frequency motor direct-connection technology, increases the rotating speed, ensures that the working rotating speed of a centrifugal roller can reach 8000rpm, increases the linear speed of the rollers, increases the blowing air for the 1# roller, enables the 1# roller to form fibers, increases the 2# roller to form fibers, and increases the productivity by more than 30%; in order to save resin, central glue spraying is adopted, glue spraying is more uniform, the glue consumption per ton of cotton is reduced, organic matters in negative pressure air are reduced, environmental protection is facilitated, the central glue spraying is main glue spraying, the peripheral glue spraying is auxiliary glue spraying, burning of the resin by insoluble high-temperature rock pulp such as slag balls is reduced, the organic matters in the negative pressure air are reduced, environmental protection is facilitated, the resin is saved, and the design structure is more reasonable; the double-body direct-connection four-roller fiber forming technology improves the productivity to 6-7 tons/hour, the fiber forming rate to 80 percent, the central glue spraying technology ensures that glue spraying is more uniform, the resin consumption is saved, the fiber forming is facilitated, the induced air duct design is thin and long, the slag balls are fewer, and the continuous service time is excellent;

the diameter of the fiber-forming cotton collecting drum is 5m, the effective width of the screen plate is not less than 2m, and the preferred width is 2.42 m; the drum surface cleaning adopts a movable high-pressure water gun, can clean each mesh, is provided with a blow-dry air knife, can clean cotton wadding in the holes and blow-dry accumulated water on the drum surface; the cotton collecting chamber adopts a water cooling design, the temperature is forcibly reduced, and the resin is not easy to solidify. The drum adopts a more reasonable mechanical structure, the running reliability and the running speed of the drum are improved, the maximum linear speed can reach 150m/min, the drum can adapt to a production line with larger capacity, the capacity is 5-6 ten thousand tons/year, the cotton dropping rate is less than 1 percent, meanwhile, the maintenance cost is greatly reduced, and the equipment can run reliably and continuously; an automatic cleaning device can be arranged in the hollow shaft, so that the maintenance cost is reduced, and the automatic cleaning device can be arranged below the cotton collecting machine, so that waste materials such as shot balls can be discharged, and the personnel maintenance is reduced.

A stokehole ladle 15 adapted to the hot metal outlet 3 and/or the auxiliary hot metal outlet 5: the design capacity of the stokehole ladle 15 is 4-5T, the inner diameter is 80-100cm, the outer height of the ladle is 1-1.5m, and the thickness of the heat-insulating material on the inner wall of the ladle is 30cm, so that the physical isolation and the insulation isolation between the molten iron in the stokehole ladle and the outside are realized, and the physical isolation and the insulation performance are ensured; and auxiliary devices related to the ladle, including automatic control of molten iron flow in front of the ladle in front of the furnace, a base mechanism, a frame, detection, automatic weighing, an electric control system, automatic turning of a hydraulic system, wireless remote control and the like.

And the cooling water circulation system provides circulating cooling for the furnace shell of the furnace body 1, the water-cooled furnace cover and the three-phase motor holder: including closed circulating water cooling system, open circulating water cooling system and one set of demineralized water manufacturing circulation system, entire system realizes the automatic operation of system through the control of temperature and liquid level:

the open type circulating water cooling system comprises a water inlet distributor, an open type water return pool and the like, circulating cooling water is provided for a water-cooling furnace cover and a furnace shell, circulating hot water is cooled through the open type water return pool, the temperature of the entering circulating water is 30-35 ℃ during normal operation, and the temperature of the coming out return water is 45-50 ℃;

the closed circulating water cooling system is a combined water cooling system for parts such as a cable, a conductive cross arm, an electrode holder, a hoop and the like in the three-phase electrode holder, circulating hot water is cooled through a plate heat exchanger, the temperature of the entering circulating water is 30-35 ℃ during normal operation, and the temperature of the exiting return water is 40-45 ℃;

an emergency water supply system is also arranged in the cooling water circulating system, and once the electric furnace water supply pump fails or fails to supply water in power failure, the system can be used for cooling by using self-contained tap water; the system adopts softened water for cooling, adopts a full-automatic water softening machine to manufacture softened water, stores the softened water in a circulating water tank for cooling each device, and has the capacity of 180-250m ³ Preferably 200m ³ The water-softening equipment has the water-producing capacity of 1000-1500 kg/h, and the preferred water-softening equipment is 1200 kg/h.

A pit 18 is arranged below the rock wool melt outlet field, the rock wool melt outlet 2 is provided with a swing drainage groove 17, the fixed end of the swing drainage groove 17 is positioned below the rock wool melt outlet 2, the swing end of the swing drainage groove 17 can swing and switch between a first set position and a second set position, and when the swing end is positioned at the first set position, the swing drainage groove 17 is matched with the fiber forming device; when the swing end was located the second and sets for the position, swing drainage groove 17 and pit 18 adaptations, clear stove slag notch 4 and pit 18 adaptations should be guaranteed electric melting furnace steady operation in process of production, avoid power change or open repeatedly and stop, when other overhaul of equipments such as fibre-forming device, for keeping electric melting furnace power stable, through swing drainage groove with the leading-in pit of melt, guarantee electric melting furnace's continuous operation, avoid power to change, make the production beat more stable.

According to the embodiment, the beneficial effects of the utility model reside in that, for utilizing red mud to produce rock wool, the electric melting furnace which can operate with high power and large melting amount, has double rock wool melt liquid outlets, is provided with the four-roller fiber-forming centrifugal machine adopting the direct connection technology of the variable frequency motor, has large fiber yield and can stably operate for a long time is designed, the furnace body adopts the boiler steel for special welding to form the furnace body of the electric melting furnace, wherein the boiler body comprises a plate-type water-cooling furnace shell, a water-cooling furnace cover, a furnace bottom plate, furnace bottom I-shaped steel, a furnace body rib plate, an iron outlet, a rock wool melt liquid outlet, a slag hole and the like, and the furnace body is provided with a weighing device, a temperature measuring device and the like; the furnace shell contains refractory and heat-insulating materials such as high-alumina bricks, high-magnesia bricks, heat-insulating bricks, high-alumina cotton boards and the like; the melting amount is designed to be 12 tons per hour; the high-thickness high-magnesium bricks and the high-aluminum bricks are used as the working layer furnace lining, so that the corrosion resistance of the electric melting furnace lining under the high-temperature and high-alkaline working conditions of the red mud is greatly improved, the aluminum and magnesium contents in molten liquid are also improved even if the working layer in the furnace is subjected to micro corrosion, and the electric melting furnace is provided with the heat insulation layer and the heat preservation layer, so that the heat utilization rate of the electric melting furnace is improved, and the electric melting furnace is more efficient and energy-saving; the electric melting furnace is provided with a plurality of molten iron outlets, so that the best use effect of controllable iron discharging in the design operation maintenance period of the electric melting furnace under large yield is ensured, and the furnace cleaning slag outlet is arranged, so that the molten fluid and residues in the furnace can be thoroughly discharged when the electric melting furnace needs to be stopped for maintenance, and the furnace is convenient to clean and maintain; the utility model provides a two meltwater fluid mouths electric melting furnace production efficiency is high, and output is big, and long-time operation is stable, and complete sets investment cost, running cost, environmental protection cost, the aspect such as output all are superior to cupola and ordinary electric melting furnace.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a two meltwater fluid mouth electric melting furnaces, includes furnace body (1), and the inside of furnace body (1) is furnace, its characterized in that, be equipped with on the lateral wall of furnace body (1) and clear stove slag notch (4), iron liquid export (3), vice iron liquid export (5) and two rock wool meltwater exports (2), two rock wool meltwater exports (2) level and sets up side by side, vice iron liquid export (5) with iron liquid export (3) level sets up side by side.

2. The dual melt port electric melter of claim 1, wherein the rockwool melt outlets (2) have a vertical height of 45-60cm from the hearth bottom surface and a diameter of 10-15 cm; the vertical height between the molten iron outlet (3) and the auxiliary molten iron outlet (5) and the bottom surface of the hearth is 8-15cm, and the diameter is 7-10 cm; the horizontal position of the furnace cleaning slag outlet (4) is not higher than the bottom surface of the hearth, and the diameter is 7-15 cm.

3. The electric melting furnace with double molten liquid flow openings as claimed in claim 1, wherein the included angle between the rock wool molten liquid outlet (2) and the molten iron outlet along the circumferential direction of the furnace body (1) is 85-95 degrees, the included angle between the rock wool molten liquid outlet (2) and the slag outlet (4) along the circumferential direction of the furnace body (1) is 175-180 degrees, the axes of the two rock wool molten liquid outlets (2) are parallel, and the distance is 80-150 cm; the two auxiliary molten iron outlets (5) are respectively positioned on two sides of the molten iron outlet (3), and the distance between the auxiliary molten iron outlet (5) and the molten iron outlet (3) is 20-50 cm.

4. The double melt fluid port electric melting furnace according to any one of claims 1 to 3, wherein the furnace body (1) comprises a furnace shell (6), and an insulating layer (7), an insulating layer (8), an oxidation-resistant layer (9) and a working layer (10) are sequentially arranged inside the furnace shell (6) from outside to inside.

5. The dual melt port electric melting furnace according to claim 4, wherein said heat insulating layer (7) is a refractory insulation plate; the heat insulation layer (8) is a ramming pouring layer of mixed slurry of crushed clay bricks and borax; the anti-oxidation layer (9) is a high-alumina brick; the working layer (10) comprises an upper working layer (10-1) and a lower working layer (10-2), the upper working layer (10-1) is made of high-alumina bricks, the lower working layer (10-2) is made of high-magnesia bricks, and a boundary between the upper working layer (10-1) and the lower working layer (10-2) is matched with the height of a set rock wool molten liquid level in the hearth.

6. The dual melt port electric melting furnace according to claim 5, wherein the thickness of said heat insulating layer (7) is 4-10 cm; the thickness of the heat-insulating layer (8) is 20-30 cm; the thickness of the antioxidation layer (9) is 30-40 cm; the thickness of the working layer (10) is 110-130 cm.

7. The electric melting furnace with double melt ports according to claim 4, wherein the furnace shell (6) comprises an outer steel plate and an inner steel plate, a connecting rib plate is arranged between the outer steel plate and the inner steel plate, a certain interval is arranged between the outer steel plate and the inner steel plate, cooling water flows through the interval, and a water cooling furnace cover (13) is arranged at the top of the furnace body (1).

8. The dual melt port electric melting furnace according to claim 7, wherein the thickness of the outer layer steel plate is 10-15cm, the thickness of the inner layer steel plate is 15-20cm, and the interval between the outer layer steel plate and the inner layer steel plate is 5-10 mm.

9. The dual melt port electric melting furnace according to claim 1, wherein a furnace base is arranged below the furnace body (1), the furnace base comprises a concrete platform (11), a certain number of I-shaped steel (12) are horizontally arranged on the concrete platform (11), the furnace body (1) is arranged on the top surface of the I-shaped steel (12), and the bottom surface of the furnace body (1) is a steel plate.

10. The dual melt port electric melter of claim 1 further comprising:

distributing device (14): the material distribution device (14) is matched with a material distribution port (16) positioned at the top of the furnace body (1), a first weighing device is arranged at the bottom of the furnace body (1), the first weighing device is electrically connected with the material distribution device (14), the first weighing device is used for detecting the overall weight of the furnace body (1) and controlling the material distribution of the material distribution device (14), the material distribution device (14) comprises a second weighing device, and the second weighing device is used for controlling the material distribution amount of the material distribution device;

a double-body direct-connected variable-frequency four-roller fiber-forming centrifuge (19) and a fiber-forming cotton collecting drum (20): the centrifugal roller of the double-body direct-connection frequency conversion four-roller fiber-forming centrifugal machine (19) is directly connected with a driving motor, the rotating speed of the centrifugal roller is 8000rpm, and the double-body direct-connection frequency conversion four-roller fiber-forming centrifugal machine (19) adopts center glue spraying; the diameter of the fiber-forming cotton collecting drum (20) is not less than 5m, and the effective width of the screen plate is not less than 2 m;

a ladle at the front of the furnace: the stokehole ladle (15) is matched with the molten iron outlet (3) and/or the auxiliary molten iron outlet (5), and the design capacity of the stokehole ladle (15) is 4-5T.

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