CN110440607A - A kind of molten cleaning that sticks together of fused magnesite mentions wound packages and sets - Google Patents

Abstract

The invention discloses a drum-lifting device for cleaning electric fused magnesia ash, which is composed of three parts: a sealed dust removal room, an underburned material output system, and a drum-lifting system. The sealed dust removal room includes a fixed dust removal room built on the ground with tracks, and two sealed doors and dust removal ports are opened in the dust removal room; the underburned material output system includes an underburned material funnel installed at the bottom of the dust removal room, and the lower part of the funnel It is a belt conveyor and a sealed trench for installing the conveyor; the lifting system includes a suspension pan for driving and lifting, two hooks under the suspension pan, a dustproof cloth cover and a cloth cover fixed between the suspension pan and the sealing pan The stretched limit steel wire rope is fixed with a sealing gasket under the sealing disc. The process of lifting the melting lump is in a fully sealed space, the dust is sucked away at any time, the underburned material is removed in time, and the smoke and dust are effectively controlled. The invention occupies a small area, has the characteristics of simple structure, easy implementation, low cost and good dust removal efficiency, and the operating environment meets the requirements of environmental protection and achieves the purpose of clean production.

Description

A device for cleaning and lifting fused magnesia fused lumps

technical field

The invention relates to the field of electric arc furnace flue gas and dust pollution control, in particular to a device for cleaning and lifting electric fused magnesia fused lumps.

Background technique

Fused magnesia is made of A-grade natural magnesite or high-purity light-burned magnesia particles or low-grade magnesite concentrate powder balls after flotation purification. It is melted in a three-phase electric arc furnace by heating at about 2800 ° C. After cooling, the molten lump is formed, and the molten lump is obtained after crushing and sorting. Ordinary fused magnesia is a good basic refractory material, and large crystal fused magnesia is an excellent high-temperature electrical insulation material. Fused magnesia is fired in an electric arc furnace. The furnace shell is welded into a cylindrical structure by steel plates. In order to ensure that the furnace shell will not be overheated and damaged, it is required in the design to reserve a certain thickness of raw materials near the furnace shell as insulation. Thermal insulation layer, under the action of high temperature, the raw materials inside the furnace body reach a molten state, and the temperature of the thermal insulation layer is lower to form under-fired material (also called back-fired material). After crystallization into lumps, these under-fired materials become powder or lumps material status. During the process of removing the furnace shell (also known as the cylinder lifting process or the shelling process), these underburned materials will fall from the top to the bottom of the clinker, and dust will be formed on the site, and the operating space will be filled. At present, most manufacturers have not done any treatment, and the flue gas and dust spread everywhere, relying on natural ventilation to spread out of the factory building, resulting in a bad environment in the workshop, and the smoke and dust in the factory area seriously exceeded the standard, polluting the external ecological environment; even if some manufacturers set up several dust removal outlets in the factory building, Introduce the dust into the dust collector through the induced draft fan, or install a dust removal cover above the furnace body, which can improve the environment in the factory building, but the control effect is poor, the dust removal efficiency is low, and the effect of controlling the flying dust that appears in the bucket is not ideal. , can not meet the environmental requirements. Therefore, dust control in the production of fused magnesia is an important task of environmental protection requirements, especially the treatment of the important source of dust pollution in the process of fused magnesia smelting cylinder lifting is the top priority.

Contents of the invention

The technical problem to be solved by the present invention is to provide a device for cleaning and lifting fused magnesia fused lumps, which can effectively control the dust in the process of lifting fused magnesia fused lumps, and the operating environment meets environmental protection requirements to achieve the purpose of clean production .

To achieve the above object, the present invention adopts the following technical solutions:

A drum lifting device for cleaning fused magnesia fused lumps, comprising a sealed dust removal room, an underburned material output system, and a drum lifting system.

The sealed dust removal room includes a trolley track, a dust removal door, a sealed door, a dust removal port, a trolley and a furnace body. The dedusting room is fixed on the ground, and the track of the trolley is laid on the ground in the dedusting room. On the track is a trolley. Sealing doors are respectively opened on the walls perpendicular to the direction of the track, and dust removal ports are respectively opened on the upper part of the wall along the direction of the track in the dust removal room.

Further, the door edge and the door seam of the airtight door are inlaid with sealing strips to ensure airtightness in the closed state.

Further, the dust removal port is connected to the air introduction port through the dust removal pipe outside the dust removal room, and the air introduction port is connected to the dust collector.

The underburned material output system includes an underburned material hopper, a belt conveyor and a sealed trench. The underburned material funnel is in the shape of a bucket and is fixed under the track at the bottom of the dust removal room. The lower part of the funnel is a belt conveyor, and the belt conveyor is installed in a sealed trench.

Further, the underburned material hopper can also be equipped with a feeding vibrator.

Further, the sealed trench can be provided with a dust removal pipeline, and the dust removal pipeline is connected with the external dust removal pipeline of the dust removal room.

The drum lifting system includes a suspension ring, a suspension pan, a sealing pan, a dustproof cloth cover, a limit wire rope and a hook. The hoisting ring of the driving hook is connected to the suspension plate through an iron chain. Two hooks are installed under the suspension plate. The positions of the hooks correspond to the lifting lugs of the cylinder body. shaped dust-proof cloth cover, the lower side of the dust-proof cloth cover is fixedly connected with the sealing disc, a sealing gasket is fixed under the sealing disc, and there are multiple limit steel wire ropes, and the two ends of the limit steel wire ropes are respectively fixed on On the suspension plate and the sealing plate, and located outside the dustproof cloth cover, the effective length of the limit wire rope should be less than the cylinder height of the dustproof cloth cover, and slightly larger than the furnace shell height.

Further, the dustproof cloth cover is fixed with a plurality of support rings equidistantly in height.

A method for using an electric fused magnesia fused lump cleaning lifting cylinder, comprising the following specific steps:

(1) Open the sealed door, move the trolley carrying the fused magnesia ash to be lifted to the dust removal room through the rails, lift the suspension plate with the driving hook, and move it to the dust removal room together with the dustproof cloth cover and the sealing plate Directly above, lower steadily, so that the sealing plate is in sealing contact with the upper edge of the dust removal room, the hanging plate continues to descend, and the two hooks under the hanging plate are effectively hung in the two lifting lugs of the furnace shell, and then the sealing door is closed;

(2) Start the belt conveyor and start the external dust collector;

(3) Slowly lift the lifting plate to lift the furnace shell slowly, and the underburned materials falling from the molten lump are sent out by the belt conveyor through the funnel. When the furnace shell is completely away from the molten lump, the lifting is stopped immediately. At this time, the sealing plate and the dust removal The upper edge of the room remains in a sealed contact state, and then stands for a period of time, so that the underburned material continues to be output, and the dust in the dust removal room and the sealed trench is sucked away;

(4) Open a section of the sealed door, and use appropriate tools to clean up the residue on the clinker and the underburned material accumulated on the trolley. At this time, there is a negative pressure in the dust removal room, and the dust will not overflow;

(5) After all the underburned materials are output and the dust in the dust removal room is basically discharged, lift the hanging plate, straighten the limit wire rope, and drive the sealing plate to move upward until the sealing plate leaves the upper edge of the dust removal room and the lower edge of the furnace shell The driving can only be moved beyond the upper edge of the dust removal room. Move the hoisted cylinder system and furnace shell together to the position where the furnace shell is placed. The two hooks under the pan are completely disengaged from the two lifting lugs on the furnace shell, and then the lifting drum system is lifted to leave the fusion lump;

(6) Fully open the airtight door, and then move the trolley carrying the frit that removes the furnace shell out of the dust removal room along the track, completing a cylinder lifting process.

Compared with prior art, the beneficial effect of the present invention is:

(1) The lifting process of the present invention is completed in a fully sealed state. In addition to the dust removal port provided in the dust removal room, a certain negative pressure is formed in the dust removal room during operation, and the dust in the dust removal room is sucked away at any time, and the dust will not overflow ;

(2) With the slow lifting of the lifting cylinder, the underburned material is sent out by the belt conveyor at any time, and there is no accumulation of remaining material, which avoids secondary dust pollution;

(3) The lifting system of the present invention adopts a dust-proof cloth cover retractable structure, which can reduce the height of the device and provide air intake for dust removal, so as to improve the dust removal efficiency;

(4) The invention occupies a small area, has the characteristics of simple structure, low cost, easy implementation, and good dust removal efficiency, and can achieve the purpose of clean production and meeting environmental protection requirements.

Description of drawings

Fig. 1 is the front view of the present invention.

Fig. 2 is a cross-sectional top view of the front view A of the present invention.

Fig. 3 is a top view of the lifting system of the present invention.

In the figure: lifting ring 1, hanging plate 2, dustproof cloth cover 3, hook 4, sealing gasket 5, dust removal port 6, lifting lug 7, belt conveyor 8, trench 9, funnel 10, track 11, trolley 12, dust removal Room 13, furnace shell 14, air inlet 15, sealing door 16, sealing disc 17, support ring 18, limit wire rope 19.

Detailed ways

The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

Example:

A drum lifting device for cleaning fused magnesia fused lumps, as shown in Figure 1, Figure 2, and Figure 3, including a sealed dust removal room, an underburned material output system, and a drum lifting system.

The described sealed dust removal room includes a fixed dust removal room 13 built on the ground covered with track 11, and two airtight doors 16 are opened on the wall surface perpendicular to the track direction in the dust removal room, and the wall surface along the track direction in the dust removal room There is a dust removal port 6 on the upper part, and the two dust removal ports outside the dust removal room are connected to the air introduction port 15 through pipelines, and the air introduction port is connected with the external dust collector.

The underburned material output system includes a bucket-shaped underburned material hopper 10 installed under the bottom track of the dust removal room, a belt conveyor 8 at the bottom of the hopper, and a sealed trench 9 for installing the belt conveyor.

The drum lifting system includes a suspension plate 2 for hoisting by the driving hook 1 and a sealing plate 17 in contact with the upper edge of the dust removal room. Two hooks 4 are housed below the hanging pan, between the hanging pan and the sealing pan, a dust-proof cloth cover 3 and a limit steel wire rope 19 preventing the stretching of the cloth cover are fixedly installed, and how many intervals are fixed on the dust-proof cloth cover A supporting ring 18 is installed sealing gasket 5 below the sealing disc.

A method for using an electric fused magnesia fused lump cleaning lifting cylinder, comprising the following specific steps:

(1) Move the trolley 12 carrying the fused magnesia ash to the dust removal room 13 through the rail 11, lift the suspension plate 2 to move to the top of the dust removal room 13, and lower it steadily so that the sealing plate 17 and the dust removal room 13 The upper edge is in sealing contact, and the suspension plate 2 continues to descend, and the two hooks 4 are effectively hung in the two lifting lugs 7 of the furnace shell 14, and then the airtight door 16 is closed.

(2) Start the belt conveyor 8. Start the external dust collector.

(3) Slowly lift the suspension plate 2 to slowly lift the furnace shell 14, and the underburned material that falls off from the melting lump is sent out by the belt conveyor 8 through the funnel 10. When the furnace shell 14 leaves the melting lump completely, the lifting is stopped immediately. At this time, the sealing disc 17 and the upper edge of the dust removal room 13 still kept the sealed contact state, and then stood for a period of time, so that the underburned material continued to output, and the dust in the dust removal room was sucked away.

(4) Open one section of airtight door 16 to clean up the underburned materials accumulated on the trolley 12 and on the fused lump.

(5) After all the underburned material is output and the dust in the dust removal room 13 is basically discharged, then lift the suspension plate 2, and the sealing plate 17 leaves the upper edge of the dust removal room 13 until the lower edge of the furnace shell 14 exceeds the upper edge of the dust removal room 13, Before the crane can be moved, move the hoisted cylinder system and the furnace shell 14 to the position where the furnace shell is placed. The hook 4 is completely disengaged from the two lifting lugs 7 on the furnace shell, and then the lifting drum system is lifted to leave the fusion lump.

(6) Open the airtight door 16 completely, and then move out the dust removal room 13 along the rails with the trolley 12 carrying the frit for removing the furnace shell. So far, the process of lifting a cylinder has been completed.

Finally, it should be noted that the above-mentioned embodiments are only the basic principles of the present invention, and do not limit the present invention in any way. Any modifications made to the technical solutions of the embodiments according to the present invention or partial or all equivalent replacements to the technical features of the present invention are within the scope of the technical protection scheme of this patent.

Claims (5)

1. a kind of molten cleaning that sticks together of fused magnesite mentions wound packages and sets, which is characterized in that including between sealing dedusting, underburnt material output system and Cartridge system is mentioned, between the sealing dedusting, including (13), hermatic door (16), dust removal port (6), platform between trolley track (11), dedusting Vehicle (12) and furnace shell (14).(13) fix on the ground between dedusting, and trolley track (11) is laid on the interior ground of dedusting, track Upper is trolley (12), is equipped with the molten furnace shell (14) to stick together on trolley, the furnace shell (14) has lifting lug (7), in dedusting Between (13) vertical track direction metope on have hermatic door (16), (13) are on the metope of orbital direction between dedusting Portion has dust removal port (5)；The underburnt material output system, including underburnt funnel (10), belt conveyor (8) and close Feud ditch (9), underburnt funnel (10) are in bucket type, are fixed on the track (11) of (13) bottom between dedusting in the following, the funnel (10) lower part is belt conveyor (8), and the belt conveyor (8) is mounted in sealing trench (9)；Described mentions cylinder system System, including hanging ring (1), hanging scaffold (2), seal disc (17), dust-proof sheet (3), limit wirerope (19) and hook (4), traveling crane It hooks the hanging ring (1) that hangs and hanging scaffold (2) is connected by iron chains, the hanging scaffold (2) fill that there are two hook (4), the extensions below Hook (4) position is corresponding with lifting lug (7) of furnace shell (14), and the hanging scaffold (2) is further fixed on cylinder-shaped dust-proof sheet below (3), the dust-proof sheet (3) is fixedly connected with seal disc (17) below, and the seal disc (17) is fixed with sealing below Pad (5), the limit wirerope (19) have it is a plurality of, limit wirerope (19) both ends be separately fixed at hanging scaffold (2) and sealing On disk (17), and it is located at outside dust-proof sheet (3), the effective length of limit wirerope (19) is less than the circle of dust-proof sheet (3) Cylinder height, and slightly larger than furnace shell (14) height.

2. a kind of molten cleaning that sticks together of fused magnesite according to claim 1 mentions wound packages and sets, which is characterized in that the hermatic door (16) door side, crack between a door and its frame stud with sealing strip, guarantee sealing in the off state.

3. a kind of molten cleaning that sticks together of fused magnesite according to claim 1 mentions wound packages and sets, which is characterized in that the dust removal port (5) it is connected to air-vent (15) outside (13) by cleaning shaft between dedusting, air-vent (15) connects deduster.

4. a kind of molten cleaning that sticks together of fused magnesite according to claim 1 mentions wound packages and sets, which is characterized in that the underburnt material Funnel (10) can further be provided with blanking vibrator.

5. a kind of molten cleaning that sticks together of fused magnesite according to claim 1 mentions wound packages and sets, which is characterized in that the dustcloth Equidistant interval is fixed with multiple bracing rings (18) to cover (3) in height.