CN110918908A - System for treating diffused gas in silicon-manganese pouring process - Google Patents
System for treating diffused gas in silicon-manganese pouring process Download PDFInfo
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- CN110918908A CN110918908A CN201911344282.6A CN201911344282A CN110918908A CN 110918908 A CN110918908 A CN 110918908A CN 201911344282 A CN201911344282 A CN 201911344282A CN 110918908 A CN110918908 A CN 110918908A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/12—Appurtenances, e.g. for sintering, for preventing splashing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D45/00—Equipment for casting, not otherwise provided for
- B22D45/005—Evacuation of fumes, dust or waste gases during manipulations in the foundry
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Abstract
The invention provides a diffused gas treatment system in a silicomanganese casting process, which comprises slide rails arranged at two ends of a plurality of silicomanganese casting ingot moulds arranged side by side in parallel, a flue gas collecting cover capable of covering the outer side of the silicomanganese casting ingot moulds, a flue gas collecting main pipe and a diffused gas post-treatment device, wherein a negative pressure smoke exhaust pipe is arranged on the flue gas collecting cover, the flue gas collecting main pipe is arranged in parallel with the slide rails, a plurality of smoke exhaust pipe connecting pipe fittings are arranged on the flue gas collecting main pipe, and the negative pressure smoke exhaust pipe fittings can be detachably connected to the smoke exhaust pipe connecting pipe fittings. When the silicon-manganese alloy molten iron is poured and solidified into ingots, the smoke collecting cover is moved to the upper part of a silicon-manganese pouring ingot mold along the slide rail, dissipated diffused gas is subjected to centralized treatment, and excessive dissipation of the diffused gas in a production workshop is avoided, so that the workshop environment is worsened, and the physical health of operating personnel is influenced. Simultaneously, the cover is collected to the flue gas still provides a space of thermal-insulated protection, avoids the operation personnel to be burnt by high temperature, and equipment investment is low, and the treatment effect is good.
Description
Technical Field
The invention belongs to the technical field of metallurgical chemical industry, and particularly relates to a system for treating diffused gas in a silicomanganese pouring process.
Background
The molten silicon-manganese alloy can generate a large amount of harmful diffused gas in the process of solidifying into ingots in the ingot mould, and the diffused gas has the characteristics of discontinuous discharge, discontinuous time, non-concentrated discharge position and the like due to the small size and non-concentrated distribution of the silicon-manganese alloy ingot mould and the long time required by solidification of the silicon-manganese alloy, thereby bringing great difficulty to the management of the diffused gas. Normally, an independent silicomanganese smelting workshop is arranged, and a smoke exhaust system is arranged in the workshop, but the smoke exhaust system is poor in pertinence and poor in smoke exhaust effect, and the workshop environment is seriously deteriorated and the health of operators is influenced in the process of casting silicomanganese into ingots. On the other hand, the workshop smoke exhaust system is not provided with any post-treatment system, so that the dissipated harmful diffused gas is directly discharged, and the atmospheric environment pollution is caused. Meanwhile, in the process of casting the silicon-manganese alloy into an ingot, high temperature is generated around the ingot mold groove, the high temperature is not beneficial to the health of operators after the long-term contact, and the safety risk that the operators are burnt exists.
Disclosure of Invention
In view of this, the invention provides a system for treating the diffused gas in the silicon-manganese casting process, so as to solve the technical problem that the production environment of a workshop is deteriorated due to the fact that the diffused gas is difficult to collect and accept in the process of casting the silicon-manganese alloy into an ingot in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a system for treating a silicon-manganese casting process diffused gas, comprising:
the slide rails are arranged at two ends of a plurality of silicon-manganese casting ingot molds which are arranged side by side in parallel;
the smoke collecting cover can cover the outer side of the silicomanganese casting ingot mold, is slidably mounted on the slide rail and is provided with a negative-pressure smoke exhaust pipe fitting;
the smoke collection main pipe is arranged in parallel to the sliding rail, a plurality of smoke discharge pipe connecting pipe fittings are arranged on the smoke collection main pipe, electric stop valves are arranged on the smoke discharge pipe contacting pipe fittings, and the negative pressure smoke discharge pipe fittings can be detachably connected to the smoke discharge pipe connecting pipe fittings; and
the device comprises a diffused gas post-treatment device, wherein the diffused gas post-treatment device is connected to the tail end of the smoke collection header pipe, and the diffused gas post-treatment device can be used for reducing pollutant emission of diffused gas from the smoke collection header pipe.
Preferably, the negative pressure smoke exhaust pipe comprises a fixed pipe section, a telescopic pipe section, a connecting pipe section and a telescopic cylinder, one end of the fixed pipe section is fixedly connected to the upper part of the smoke collection cover, the telescopic pipe section is an elastic corrugated pipe, one end of the telescopic pipe section is fixedly connected to the fixed pipe section, the connecting pipe section is fixedly connected to one end of the telescopic pipe section, which is far away from the fixed pipe section, the telescopic cylinder is fixedly installed on the fixed pipe section or the smoke collection cover, and the output end of the telescopic cylinder is connected to the connecting pipe section.
Preferably, the connecting pipe section is arranged in a bell mouth shape, the pipe diameter of one end far away from the telescopic pipe section is gradually increased, and an elastic gasket is arranged on the inner wall of the connecting pipe section.
Preferably, the bottom of the flue gas collecting cover is provided with a moving trolley, the moving trolley is slidably mounted on the slide rail and can linearly move along the slide rail, the moving trolley is provided with a braking mechanism, and the silicon-manganese casting process diffused gas treatment system further comprises a positioning device, wherein the positioning device is electrically connected with the braking mechanism of the moving trolley and is used for controlling the moving trolley to stop after the moving trolley travels a preset distance or reaches a preset position.
Preferably, still include a plurality of set up side by side in the flue gas is collected the ferro-silico-manganese base cutting device at cover middle part, ferro-silico-manganese base cutting device includes ferro-silico-manganese sediment storage tank, axis of rotation and rocking handle, the length direction setting of ferro-silico-manganese sediment storage tank perpendicular to silico-manganese pouring ingot mould, and including groove body and tank bottom, the tank bottom is rotatable install in the groove body bottom, axis of rotation fixed connection the tank bottom, and both ends rotatable coupling the both sides wall of cover is collected to the flue gas, the rocking handle set up in the one end of axis of rotation. .
Preferably, the rocking handle is zigzag, and the ferro-silico-manganese blank cutting device still includes the transmission connecting rod, the transmission connecting rod perpendicular to the axis of rotation sets up, the rocking handle is kept away from the one end of axis of rotation rotatable mounting on the transmission connecting rod.
Preferably, the ferro-silicomanganese cutting device still includes temperature sensor, temperature sensor set up in on the cell body for detect the surface temperature of ferro-silicomanganese base.
Preferably, at least one carbon monoxide sensor is arranged in the flue gas collecting cover.
Preferably, the smoke collection cover is further provided with a replacement ventilation pipe, and an outlet of the replacement ventilation pipe is arranged in the middle of the smoke collection cover.
Preferably, the diffused gas post-treatment device comprises a secondary connection cyclone dust collection assembly and an absorption tower assembly.
According to the technical scheme, the invention provides a system for treating the diffused gas in the silicon-manganese casting process, which has the beneficial effects that: arranging silicon-manganese casting ingot molds in rows, arranging slide rails at two ends of the silicon-manganese casting ingot molds, installing the smoke collecting cover on the slide rails, arranging a smoke collecting main pipe in parallel with the slide rails, and detachably connecting the smoke collecting main pipe with a negative-pressure smoke exhaust pipe on the smoke collecting cover. When the silicon-manganese alloy molten iron is poured and solidified into ingots, the smoke collecting cover moves to the position above a silicon-manganese alloy pouring ingot mold along the slide rail, and the diffused gas dissipated in the process of pouring and solidifying the silicon-manganese alloy molten iron into ingots is collected and conveyed to the diffused gas post-treatment device for treatment, so that the diffused gas dissipated in the process of pouring and solidifying the silicon-manganese alloy molten iron into ingots is collected and treated in a centralized manner, and excessive diffused gas is prevented from being dissipated in a production workshop, so that the workshop environment is worsened, and the health of operators is influenced. Meanwhile, the smoke collecting cover also provides a space for heat insulation protection, so that a high-temperature silicon-manganese casting ingot mold is isolated, operators are prevented from approaching the mold, and the operators are prevented from being burnt by high temperature. Meanwhile, when the silicomanganese ingot moulds at different positions are used, the negative-pressure smoke exhaust pipe fitting is disconnected with the smoke collecting main pipe, the smoke collecting cover can be moved to the position corresponding to the silicomanganese ingot mould along the slide rail, the diffused smoke at different positions can be collected and processed in real time, the equipment investment is low, the processing effect is good, and the use is convenient and fast.
Drawings
FIG. 1 is a schematic diagram of a system for treating a diffusion gas generated during a silicomanganese casting process.
Fig. 2 is a partially enlarged view of a portion a shown in fig. 1.
FIG. 3 is a side view of a silicon manganese casting process diffuse gas treatment system.
Fig. 4 is a schematic sectional view taken along line B-B in fig. 3.
FIG. 5 is a bottom view of the Si-Mn casting process diffuse gas treatment system.
Fig. 6 is a schematic cross-sectional view taken along line D-D of fig. 5.
Fig. 7 is a partially enlarged view of a portion B shown in fig. 1.
Fig. 8 is a schematic sectional view taken along line a-a of fig. 3.
Fig. 9 is a partially enlarged view of the portion C shown in fig. 8.
Fig. 10 is a schematic cross-sectional view taken along line C-C of fig. 5.
Fig. 11 is an enlarged view of a portion D shown in fig. 10.
FIG. 12 is a schematic view of the automatic control principle of the diffused gas treatment system in the silicon-manganese casting process.
FIG. 13 is a schematic diagram of the line connections of the aftertreatment device.
In the figure: the silicon-manganese casting process diffused gas treatment system comprises a silicon-manganese casting process diffused gas treatment system 10, a silicon-manganese casting ingot mold 20, a sliding rail 100, a flue gas collecting cover 200, a carbon monoxide sensor 201, a negative pressure smoke exhaust pipe fitting 210, a fixed pipe section 211, a telescopic pipe section 212, a connecting pipe section 213, a telescopic cylinder 214, a movable trolley 220, a mounting frame body 230, a liftable cylinder 240, a molten iron introducing groove 250, an air flow guiding pipe fitting 260, an air hole 261, a diffused gas suction inlet 262, a flue gas collecting main pipe 300, a smoke exhaust pipe connecting pipe fitting 310, an electric stop valve 320, a post-treatment device 400, a cyclone dust removal assembly 410, an absorption tower assembly 420, a silicon-manganese iron billet cutting device 500, a temperature sensor 501, a manganese-iron slag storage tank 510, a tank body 511, a tank bottom 512, a rotating shaft 520, a rocking handle 530, a transmission.
Detailed Description
The technical scheme and the technical effect of the invention are further elaborated in the following by combining the drawings of the invention.
Referring to FIG. 1, in one embodiment, a system 10 for collecting and processing harmful emissions from molten Si-Mn alloy casting and solidifying Si-Mn alloy into ingots, comprises: the device comprises slide rails 100 arranged at two ends of a plurality of silicon-manganese ingot casting molds 20 arranged side by side in parallel, a flue gas collecting cover 200 capable of covering the outer sides of the silicon-manganese ingot casting molds 20, a flue gas collecting main pipe 300 and a diffused gas post-processing device 400.
The smoke collection cover 200 is slidably mounted on the slide rail 100, and a negative-pressure smoke exhaust pipe 210 is arranged on the smoke collection cover 200. Flue gas collecting main pipe 300 is on a parallel with slide rail 100 sets up, flue gas collecting main pipe 300 is last to be provided with a plurality of pipes of discharging fume and to connect pipe fitting 310, it is provided with electronic stop valve 320 on the pipe fitting 310 to discharge fume, the negative pressure discharge fume pipe fitting 210 can dismantle connect in discharge fume on the pipe fitting 310. The diffused gas post-treatment device 400 is connected to the end of the flue gas collection header 300, and the diffused gas post-treatment device 400 is capable of performing pollutant emission reduction operation on the diffused gas from the flue gas collection header 300.
When the silicon-manganese alloy molten iron is poured and solidified into ingots, the flue gas collecting cover 200 is moved to the position above the silicon-manganese alloy pouring ingot mold 20 along the slide rail 100, and the diffused gas dissipated in the process of pouring and solidifying the silicon-manganese alloy molten iron into ingots is collected and conveyed to the diffused gas post-treatment device 400 for treatment by using the negative pressure formed at the negative pressure smoke exhaust pipe 210, so that the diffused gas dissipated in the process of pouring and solidifying the silicon-manganese alloy molten iron into ingots is collected and treated in a centralized manner, and excessive dissipation of the diffused gas in a production workshop is avoided, so that the workshop environment is deteriorated, and the health of operators is influenced. Meanwhile, the flue gas collecting cover 200 also provides a space for heat insulation protection, so that the high-temperature silicon-manganese casting ingot mold 20 is isolated, operators are prevented from approaching the mold, and the operators are prevented from being burnt by high temperature.
Meanwhile, when the silicomanganese ingot moulds 20 at different positions are used, the connection between the negative-pressure smoke exhaust pipe 210 and the smoke collecting main pipe 300 is disassembled, and the smoke collecting cover 200 can be moved to the position corresponding to the silicomanganese ingot mould 20 to be used along the slide rail 100, so that the diffused smoke at different positions can be collected and processed in real time, the equipment investment is low, the processing effect is good, and the use is convenient and fast.
Referring to fig. 2, in an embodiment, a moving trolley 220 is disposed at the bottom of the smoke collection cover 200, the moving trolley 220 is slidably mounted on the slide rail 100 and can move linearly along the slide rail 100, and the moving trolley 220 has a braking mechanism to control the moving trolley 220 to move along the slide rail 100, so as to transfer the smoke collection cover 200.
Referring to fig. 2, in a preferred embodiment, the smoke collection cover 200 is mounted on a mounting frame 230, the mounting frame 230 is disposed on the moving trolley 220, the mounting frame 230 is provided with a lifting cylinder 240, the lifting cylinder 240 is disposed at two ends of the smoke collection cover 200, and an output end of the lifting cylinder 240 is fixedly connected to the smoke collection cover 200. The lifting cylinder 240 is started, the output end of the lifting cylinder 240 extends upwards, so that the flue gas collecting cover 200 rises upwards along the mounting frame body 230, the bottom end of the flue gas collecting cover 200 is higher than the silicon-manganese casting ingot mold 20, the mounting frame body 230 is communicated with the flue gas collecting cover 200 to move along the slide rail 100 by using the movable trolley 220, and therefore the flue gas collecting cover 200 is used for collecting diffused gas dissipated from the silicon-manganese casting ingot molds 20, the equipment investment is reduced, and the space occupancy rate of the equipment is reduced. When the moving trolley 220 drives the flue gas collecting hood 200 to reach a predetermined position (i.e. an area above the silicon manganese ingot casting mold 20), the lifting cylinder 240 retracts, so that the flue gas collecting hood 200 is covered outside the silicon manganese ingot casting mold 20. The bottom end of the flue gas collection cover 200 may be in a suspended state, and in order to keep the process of pouring and solidifying silicon-manganese alloy molten iron into ingots in a relatively closed environment, further reduce the escape of diffused gas and ensure the safety of operators, the lower end of the flue gas collection cover 200 is preferably in contact with the ground. For example, the lower end of the smoke collection cover 200 is further provided with an elastic sealing rubber strip, when the smoke collection cover 200 is in contact with the ground, the elastic sealing rubber strip plays a role in buffering to prevent the smoke collection cover 200 from being in hard contact with the ground, and on the other hand, the bottom of the smoke collection cover 200 is in close contact with the ground, so that the sealing performance of the system is improved.
In order to further reduce the dissipation of the diffused gas when the molten silicon-manganese alloy is introduced into the silicon-manganese ingot mold 20 from the ladle (in fact, the amount of the diffused gas is large), in an embodiment, one end of the flue gas collecting cover 200 is provided with an opening, and a molten iron introducing groove 250 is obliquely arranged at the opening, wherein the front end of the molten iron introducing groove is wider, so that the molten iron in the ladle can be poured into the molten iron introducing groove 250, and the rear end of the molten iron introducing groove is narrower, so that the molten iron can enter the silicon-manganese ingot mold 20 along the molten iron introducing groove 250. In the process of guiding the silicon-manganese alloy molten iron into the molten iron guiding groove 250 from the ladle, the generated diffused flue gas penetrates through the notch of the molten iron guiding groove 250 under the action of negative pressure and is sucked into the flue gas collecting cover 200 and finally collected and treated, so that the discharge amount of the diffused gas is reduced, and the environment of a production workshop is effectively improved.
Referring to fig. 3 to 6, in order to improve the collection efficiency of the diffused gas, in a preferred embodiment, an airflow guiding pipe 260 is further disposed inside the flue gas collection cover 200, and the airflow guiding pipe 260 is disposed on the top of the flue gas collection cover 200 and is communicated with the negative pressure smoke exhaust pipe 210. When the flue gas collecting hood 200 is covered outside the silicon manganese ingot casting mold 20, the airflow guiding pipe 260 is suspended right above the silicon manganese ingot casting mold 20, so that the diffused gas is quickly collected into the airflow guiding pipe 260 under the action of negative pressure and is discharged through the airflow guiding pipe 260. Further, the width of the bottom of the air flow guiding pipe 260 gradually decreases from one end close to the molten iron guiding groove 250 (i.e. the inlet end of the silicomanganese ingot mold 20 during molten iron casting) to one end away from the molten iron guiding groove 250, and the air flow guiding pipe 260 is provided with a plurality of air holes 261, the density of which gradually decreases from one end close to the molten iron guiding groove 250 to one end away from the molten iron guiding groove 250. On one hand, in the flue gas collecting cover 200, each part obtains stronger negative pressure attraction force, so that the collection efficiency of the diffused gas is improved, and on the other hand, the collection efficiency of the diffused gas at the inlet end of the silicomanganese casting ingot mold 20 is enhanced, so that a large amount of diffused gas generated when the silicomanganese molten iron is just led into the silicomanganese casting ingot mold 20 from a ladle is quickly collected, and the dissipation amount of the diffused gas is reduced. Further, a bell-mouth-shaped vent gas suction inlet 262 is provided on a side of the air flow guiding pipe member 260 adjacent to the inlet end of the silicon manganese ingot mold 20, and the vent gas suction inlet 262 is provided adjacent to the inlet of the molten iron guiding groove 250, so as to further rapidly collect a large amount of vent gas generated when the silicon manganese alloy molten iron is just guided into the silicon manganese ingot mold 20 by the ladle.
Referring to fig. 7, in another preferred embodiment, in order to facilitate the negative pressure smoke exhaust pipe 210 and the smoke exhaust pipe connecting pipe 310 to be quickly connected or detached, reduce the labor intensity of the operator, improve the convenience of the system 10 for processing the diffused gas during the silicon manganese casting process, and improve the efficiency of collecting the diffused gas, the negative pressure smoke exhaust pipe 210 includes a fixed pipe section 211, a telescopic pipe section 212, a connecting pipe section 213, and a telescopic cylinder 214, one end of the fixed pipe section 211 is fixedly connected to the upper portion of the smoke collection hood 200 and is communicated with the inner cavity of the smoke collection hood 200, the telescopic pipe section 212 is an elastic corrugated pipe, one end of the telescopic pipe section 212 is fixedly connected to the fixed pipe section 211, the connecting pipe section 213 is fixedly connected to one end of the telescopic pipe section 212 far away from the fixed pipe section 211, and the telescopic cylinder 214 is fixedly mounted on the fixed pipe section 211 or the, and the output end is connected to the connection pipe section 213.
When the moving trolley 220 drives the smoke collection cover 200 to slide to a preset position along the slide rail 100, the smoke collection cover 200 can be covered outside the silicomanganese ingot casting mold 20, and the nozzle of the negative pressure smoke exhaust pipe 210 is substantially aligned with the nozzle of the smoke exhaust pipe connecting pipe 310. The telescopic cylinder 214 is controlled to stretch out, the output end of the telescopic cylinder 214 drives the connecting pipe section 213 to stretch out forwards, and the telescopic pipe section 212 is stretched, so that the connecting pipe section 213 is gradually close to the smoke exhaust pipe connecting pipe 310 and is sleeved outside the smoke exhaust pipe connecting pipe 310 to complete the rapid butt joint of the pipe orifice of the negative pressure smoke exhaust pipe 210 and the smoke exhaust pipe connecting pipe 310.
Further, the connecting pipe section 213 is a bell mouth, and is far away from the one end pipe diameter of the telescopic pipe section 212 becomes gradually, so that the connecting pipe section 213 is in butt joint with the smoke exhaust pipe connecting pipe 310 fast, an elastic gasket is arranged on the inner wall of the connecting pipe section 213, and after butt joint is improved, the connecting pipe section 213 and the smoke exhaust pipe connecting pipe 310 are sealed.
Furthermore, an elastic sealing washer is arranged at the pipe orifice of the smoke exhaust pipe connecting pipe 310, and after the connecting pipe section 213 is combined with the smoke exhaust pipe connecting pipe 310, the elastic sealing washer is tightly attached to the elastic sealing washer, so that the sealing performance of the connecting pipe section 213 and the smoke exhaust pipe connecting pipe 310 after butt joint is improved.
It is worth mentioning that the negative pressure can be formed at the negative pressure smoke exhaust pipe 210 at least in the following two ways, so as to improve the collection efficiency of the diffused gas. For example, a negative pressure generating device, such as a vacuum pump, is disposed at the end of the flue gas collecting manifold 300 to provide power for collecting the diffused gas by the negative pressure generated by the negative pressure generating device. For example, an air compressing device, such as an air compressor or a blower, is disposed at the end of the flue gas collecting main 300, and in this case, a venturi structure is disposed at the connecting pipe 310 of the smoke exhaust pipe, so as to form a negative pressure area at the negative pressure smoke exhaust pipe 210 by the pressure change of the compressed air in the flue gas collecting main 300, thereby realizing the suction of the diffused gas into the flue gas collecting main 300. When the method is adopted, on one hand, the collected diffused gas can be firstly mixed with clean air, the concentration of harmful gas, dust and the like in the flue gas collection main pipe 300 is reduced, the post-treatment difficulty is reduced, on the other hand, the dust (including manganese-containing dust, silicon dioxide, C particles and the like) contained in the diffused gas is not easy to adhere to the pipe wall of the flue gas collection main pipe 300 under the disturbance of strong airflow, in the using process, the compressed air sweeps the whole flue gas collection main pipe 300, the dust is effectively prevented from being enriched on the pipe wall of the flue gas collection main pipe 300, the service life of the equipment is prolonged, and the collection efficiency of the diffused gas by the silicon-manganese casting process diffused gas treatment system 10 is maintained after long-term use.
In order to further improve the convenience of the system 10 for treating the diffused gas in the silicon-manganese casting process, so that the flue gas collecting hood 200 can be rapidly and accurately moved to a preset position, and the smoke exhaust pipe connecting pipe 310 can be rapidly and accurately butted with the negative pressure smoke exhaust pipe 210, the system 10 for treating the diffused gas in the silicon-manganese casting process further comprises a positioning device 700, wherein the positioning device 700 is electrically connected with a braking mechanism of the moving trolley 220 and is used for controlling the moving trolley 220 to move for a preset distance or stop after reaching the preset position.
For example, the positioning device 700 is a photoelectric switch sensor, and comprises a transmitter and a receiver, the transmitter and the receiver are respectively and fixedly disposed on two sides of the moving trolley 220, and when the moving trolley 220 passes through the photoelectric switch sensor, a braking signal is generated to control the moving trolley 220 to stop braking.
For example, the positioning device 700 is a displacement sensor, and controls the moving trolley 220 to stop braking according to the actual moving distance of the moving trolley.
Referring to fig. 8 to 11, in another embodiment, the system 10 for treating the off-gas generated during the silicon-manganese casting process further includes a plurality of cutting devices 500 for cutting the silico-manganese iron blank, which are disposed side by side in the middle of the flue gas collecting hood 200, wherein the cutting devices 500 for cutting the silico-manganese iron blank include a storage tank 510 for storing silico-manganese iron slag, a rotating shaft 520 and a rocking handle 530, the storage tank 510 for storing silico-manganese iron slag is disposed perpendicular to the length direction of the ingot mold 20 for silicon-manganese casting, and includes a tank body 511 and a tank bottom 512, the tank bottom 512 is rotatably mounted at the bottom of the tank body 511, the rotating shaft 520 is fixedly connected to the tank bottom 512, and both ends of the rotating shaft are rotatably connected to two side walls of the.
In the process of solidifying the silicon-manganese alloy molten iron into ingots, the solidified or to-be-solidified silicon-manganese iron ingots are required to be cut at high temperature so as to divide the strip-shaped iron ingots into a plurality of small blocks, so that the silicon-manganese iron ingots are transferred to a water cooling pool to be cooled by utilizing a lifting appliance, the ingot forming efficiency of the silicon-manganese iron ingots is improved, and the emission of diffused gas is reduced. Before the flue gas collecting cover 200 is moved to the vicinity of the silicomanganese ingot casting mold 20, the rotating shaft 520 is rotated through the rocking handle 530, so that the groove bottom 512 is attached to the groove body 511, and the silicomanganese iron slag storage tank 510 with a lower closed semi-surrounding structure is formed. The silicomanganese slag storage tank 510 is filled with silicomanganese slag (powdery and small granular substances generated in the process of crushing silicomanganese) for cutting silicomanganese iron ingots, and the silicomanganese slag is blocked by the tank bottom 512 and is contained in the silicomanganese iron slag storage tank 510. The flue gas collecting hood 200 is moved to the vicinity of the silicomanganese ingot casting mold 20 and is covered on the silicomanganese ingot casting mold 20, and at this time, the silicomanganese slag storage tank 510 is arranged in parallel to the width direction of the silicomanganese ingot casting mold 20. After pouring is completed, before the silicon-manganese alloy is completely solidified or just solidified, the rotating shaft 520 is rotated through the rocking handle 530, so that the groove bottom 512 is separated from the groove body 511, silicon-manganese alloy slag is scattered from an opening at the bottom of the groove body 511 and falls on the surface of a silicon-manganese alloy iron ingot, a linear low-temperature zone is formed on the surface of the silicon-manganese alloy iron ingot, and the silicon-manganese alloy iron ingot is cut into a plurality of small blocks convenient to lift and transfer.
Further, the rocking handle 530 is zigzag-shaped, the cutting device 500 further includes a transmission link 540, the transmission link 540 is perpendicular to the rotating shaft 520, and an end of the rocking handle 530 away from the rotating shaft 520 is rotatably mounted on the transmission link 540. Further, the end of the transmission link 540 is further provided with a master rocking handle 550, one end of the master rocking handle 550 is rotatably connected to the side wall of the flue gas collecting cover 200, and the middle part of the master rocking handle is hinged to the transmission link 540. Rotate total rocking handle 550, drive the swing of transmission connecting rod 540 to through all rocking handles 530 of transmission connecting rod 540 drive rotate simultaneously, realize through total rocking handle 550 or transmission connecting rod 540 control tank bottom 512 with the state of opening and shutting of groove body 511 realize feeding and cutting, convenient operation has reduced intensity of labour effectively, avoids the operation of operating personnel for a long time under high temperature environment.
Referring to fig. 12, in another embodiment, the cutting apparatus 500 further includes a temperature sensor 501, and the temperature sensor 501 is disposed on the bath body 511 and is used for detecting the surface temperature of the ferromanganese ingot. The temperature sensor can be a thermocouple, a thermal resistor and the like, is preferably an infrared thermometer, can accurately detect the temperature of the surface of the silicon-manganese alloy iron ingot, and can judge the solidification state of the silicon-manganese alloy according to the temperature, so that the time for cutting the silicon-manganese alloy iron ingot by the silicon-manganese alloy iron slag is controlled, and meanwhile, when the temperature is reduced to a certain range, an operator is prompted to hoist the silicon-manganese alloy iron ingot, so that the speed of solidifying the aged silicon-manganese alloy is increased, and the smelting efficiency is improved.
In another embodiment, at least one carbon monoxide sensor 201 is disposed in the flue gas collecting hood 200 to detect the concentration of the diffused gas in the flue gas collecting hood 200, so as to select whether to prolong the collecting time of the diffused gas or to hoist the silicon-manganese alloy iron ingot according to actual conditions.
In a preferred embodiment, the system 10 further includes a control center 600, an input end of the control center 600 is electrically connected to the temperature sensor 501, the carbon monoxide sensor 201 and the positioning device 700, an output end of the control center 600 is electrically connected to the driving and braking mechanism of the moving trolley 220, the executing mechanism of the liftable cylinder 240 and the executing mechanism of the telescopic cylinder 214, the control center 600 controls start-stop and displacement of the moving trolley 220, controls actions of the liftable cylinder 240 and the telescopic cylinder 214, and controls cutting time of the silicon-manganese alloy iron ingot according to the acquired temperature information detected by the temperature sensor 501, the concentration information of the diffused gas detected by the carbon monoxide sensor 201 and the position information of the smoke collection cover 200 detected by the positioning device 700, the automatic control is realized, the labor intensity is reduced, even unmanned operation is realized, the operation safety is improved, and the intrinsic safety is realized.
In another embodiment, the fume collecting hood 200 is further provided with a replacement ventilation pipe, and an outlet of the replacement ventilation pipe is arranged in the middle of the fume collecting hood 200. Preferably, the replacement ventilation pipe is a long pipe arranged in the middle of the smoke collection cover 200 and parallel to the length direction of the smoke collection cover 200, and a plurality of ventilation cooling holes are formed in the replacement ventilation pipe. In the silicon-manganese alloy casting process and the silicon-manganese alloy ingot forming process, air or inert gas such as nitrogen is introduced into the flue gas collecting cover 200 through the replacement ventilation pipe, particularly to the surface of a silicon-manganese alloy iron ingot, on one hand, ventilation treatment on the flue gas collecting cover 200 is enhanced, the diffused gas in the flue gas collecting cover 200 is replaced by clean air or nitrogen, and the collection efficiency of the diffused gas is improved. On the other hand, cold air flow blowing is formed on the surface of the silicon-manganese alloy iron ingot, so that the dissipation of diffused air is accelerated, and the cooling of the silicon-manganese alloy iron ingot is accelerated.
Referring to fig. 13 together, in yet another embodiment, the exhaust gas aftertreatment device 400 includes a cyclone assembly 410 and an absorber assembly 420 connected in series, the cyclone assembly 410 being used for removing soot from the collected exhaust gas, and the absorber assembly 420 being used for reducing the content of harmful gases, such as carbon dioxide, nitrogen oxides, sulfur oxides, and soot in the exhaust gas.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A silicomanganese pouring process diffused gas processing system, characterized by comprising:
the slide rails are arranged at two ends of a plurality of silicon-manganese casting ingot molds which are arranged side by side in parallel;
the smoke collecting cover can cover the outer side of the silicomanganese casting ingot mold, is slidably mounted on the slide rail and is provided with a negative-pressure smoke exhaust pipe fitting;
the smoke collection main pipe is arranged in parallel to the sliding rail, a plurality of smoke discharge pipe connecting pipe fittings are arranged on the smoke collection main pipe, electric stop valves are arranged on the smoke discharge pipe contacting pipe fittings, and the negative pressure smoke discharge pipe fittings can be detachably connected to the smoke discharge pipe connecting pipe fittings; and
the device comprises a diffused gas post-treatment device, wherein the diffused gas post-treatment device is connected to the tail end of the smoke collection header pipe, and the diffused gas post-treatment device can be used for reducing pollutant emission of diffused gas from the smoke collection header pipe.
2. The system for treating the diffused gas in the silicomanganese casting process according to claim 1, wherein the negative pressure smoke exhaust pipe comprises a fixed pipe section, a telescopic pipe section, a connecting pipe section and a telescopic cylinder, one end of the fixed pipe section is fixedly connected to the upper part of the smoke collection cover, the telescopic pipe section is an elastic corrugated pipe, one end of the telescopic pipe section is fixedly connected to the fixed pipe section, the connecting pipe section is fixedly connected to one end of the telescopic pipe section, which is far away from the fixed pipe section, the telescopic cylinder is fixedly installed on the fixed pipe section or the smoke collection cover, and the output end of the telescopic cylinder is connected to the connecting pipe section.
3. The system for treating the diffused gas in the silicomanganese casting process according to claim 2, wherein said connecting pipe section is flared and gradually increases in pipe diameter toward the end away from said telescopic pipe section, and an elastic gasket is disposed on the inner wall of said connecting pipe section.
4. The system for treating the diffused gas in the silicon-manganese casting process according to claim 1, wherein a moving trolley is arranged at the bottom of the flue gas collection cover, the moving trolley is slidably mounted on the slide rail and can linearly move along the slide rail, and the moving trolley is provided with a braking mechanism;
the system for treating the diffused gas in the silicon-manganese casting process further comprises a positioning device, wherein the positioning device is electrically connected with a braking mechanism of the movable trolley and is used for controlling the movable trolley to stop after the movable trolley travels a preset distance or reaches a preset position.
5. The system of claim 1, further comprising a plurality of cutting devices for cutting the ferro-silico-manganese ingot disposed side by side in the middle of the flue gas collection hood, wherein the cutting devices for cutting the ferro-silico-manganese ingot comprise a ferro-silico-manganese slag storage tank, a rotation shaft and a rocking handle, the ferro-silico-manganese slag storage tank is disposed perpendicular to the length direction of the ferro-silico-manganese ingot mold and comprises a tank body and a tank bottom, the tank bottom is rotatably mounted at the bottom of the tank body, the rotation shaft is fixedly connected with the tank bottom, two ends of the rotation shaft are rotatably connected with two side walls of the flue gas collection hood, and the rocking handle is disposed at one end of the rotation shaft.
6. The system of claim 6, wherein the rocking handle is zigzag-shaped, and the cutting device further comprises a transmission link arranged perpendicular to the rotation axis, and an end of the rocking handle away from the rotation axis is rotatably mounted on the transmission link.
7. The system for processing the off-gas in the silicomanganese casting process according to claim 5 or 6, wherein said silicomanganese iron blank cutting device further comprises a temperature sensor disposed on said cell body for detecting the surface temperature of the silicomanganese iron blank.
8. The system of claim 1, wherein at least one carbon monoxide sensor is disposed within the flue gas collection enclosure.
9. The system for treating the diffused gas in the silicomanganese casting process according to claim 8, wherein said fume collection hood is further provided with a replacement vent pipe, and an outlet of said replacement vent pipe is arranged in the middle of said fume collection hood.
10. The system of claim 1, wherein the bleed gas aftertreatment device comprises a secondary cyclone assembly and an absorber tower assembly.
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| CN201911344282.6A CN110918908B (en) | 2019-12-25 | 2019-12-25 | System for treating diffused gas in silicon-manganese pouring process |
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| CN201911344282.6A CN110918908B (en) | 2019-12-25 | 2019-12-25 | System for treating diffused gas in silicon-manganese pouring process |
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| CN113106175A (en) * | 2021-03-29 | 2021-07-13 | 北京中航天业科技有限公司 | Steel slag treatment hot flue gas collection system and method |
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