CN204958970U - Refining furnace ladle bottom blowing argon controlling means - Google Patents
Refining furnace ladle bottom blowing argon controlling means Download PDFInfo
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- CN204958970U CN204958970U CN201520744251.0U CN201520744251U CN204958970U CN 204958970 U CN204958970 U CN 204958970U CN 201520744251 U CN201520744251 U CN 201520744251U CN 204958970 U CN204958970 U CN 204958970U
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Abstract
The utility model belongs to the bottom blowing of steelmaking refining furnace ladle gaseous system, especially a refining furnace ladle bottom blowing argon controlling means. The utility model aims to solve the technical problem that a refining furnace ladle bottom blowing argon controlling means that can improve argon gas flow accuracy and the maneuverability of system is provided, including monitoring equipment, switch board, two at least distribution cabinets, ladle, control box, its characterized in that: monitoring equipment and switch board are installed in the central control room, the distribution cabinet is installed at the scene, the control box is installed at the scene, the ladle sets up in LF refining furnace soft blow position and blowing position, set up the PLC distant station in the distribution cabinet. Two set total distribution cabinets in this device, two tunnel bottom blowing pipelines, the difference independent control, mutual noninterference to two station ladles, two tunnel bottom blowing brick air feed, adopts two tunnel methods of controlling respectively, can guarantee the mutual independence of two station bottom blowing positions. The utility model discloses be particularly useful for making steel in the refining furnace ladle bottom blowing gas technology.
Description
Technical field
The utility model belongs to steel-making refining furnace ladle bottom blowing gas system, particularly a kind of refining furnace steel ladle bottom argon blowing control device.
Background technology
In steel mill's STEELMAKING PRODUCTION, especially in LF refining furnace smelting process, carry out Argon to stir molten steel composition and temperature, slag making desulfurization and the gas removed in molten steel and non-metallic inclusion, alloy fine setting is carried out to molten steel, improve quality of molten steel, thus provide cleaner molten steel to continuous casting, improve pouring molten steel performance.At present, the basic bottom blowing mode that adopts carries out Argon, and namely install supply air line at ladle bottom, argon gas enters molten steel by the gas permeable brick of ladle bottom, and bottom blowing is than top blast mode better effects if.But situation and the phenomenons such as the bottom blowing that usually there will be ladle is obstructed, gas leakage, blocking, argon gas flows backwards, accidental state cannot switch, cause rate of blowing out low; off analysis is caused when variety steel is produced; non-uniform temperature, molten steel is impure, affects the quality product of steel mill.
Traditional manual or semiautomatic controls technology has the shortcomings such as structure is simple, response speed slow, control accuracy is not high, is difficult to realize controlling accurately the argon gas amount of being blown into.Conventional LF ladle refining furnace BOTTOM ARGON BLOWING system mainly have employed under meter and the adjustable loop of Pneumatic diaphragm valve, and Pneumatic diaphragm valve is difficult to realize large-scale high-precision Flow-rate adjustment.The operating mode different according to production technique, Argon amount needs to carry out regulating on a large scale in real time, especially when low discharge regulates, owing to starting accuracy and the poor stability of membrance valve, little time large during the argon flow amount exported, in the whole control process of LF stove, the whipped state of molten steel is unstable, and liquid level is in suddenly big or suddenly small state, causes the consumption of the resistance to materials such as graphite electrode consumption, ladle slag line, gas permeable brick and brick cup to increase; When liquid level instability, electrode current switch is in frequent movement state, both adds power consumption, too increases probability of failure; Cause causing submerged arc bad in smelting process, molten steel recarburization is more simultaneously; In smelting process, extend smelting cycle, add consumption of electrode and argon gas consumption.Existing Controlling System operability and tolerance range can not meet the requirement of production to a certain extent.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of refining furnace steel ladle bottom argon blowing control device that can improve argon flow amount tolerance range and system operability.
The utility model solves the technical scheme that its technical problem adopts: refining furnace steel ladle bottom argon blowing control device, comprise monitoring equipment, housing, at least two distributing cabinets, ladle, operation boxs, it is characterized in that: described monitoring equipment and housing are arranged in Central Control Room, described distributing cabinet is arranged on scene, described operation box is arranged on scene, described ladle is arranged on LF refining furnace soft blow position and blowing position, arranges PLC distant station in described distributing cabinet.
Further, described Controlling System comprises soft blow position and blowing position, and described two stations are provided with the on-the-spot local operation case with touch-screen.
Further, each ladle divides two-way gas piping to carry out bottom blowing.
Further, gas-holder is provided with in described distributing cabinet.
Further, current stabilization bag is provided with after variable valve group in distributing cabinet.
Further, in distributing cabinet, after under meter, magnetic valve is set.
The beneficial effects of the utility model are: this device has two cover distributing cabinets, and two-way bottom blowing pipeline, independently controls, do not interfere with each other, respectively to two station ladle two-way bottom blowing brick air feed, the method adopting two-way to control respectively, can ensure the separate of two station Bottom blowing locations.In order to the efficiency that blows is higher, the bottom blowing pipeline of each station, is divided into again the identical two-way argon gas of control to carry out bottom blowing, so each ladle is furnished with the two-way argon gas of identical control.In addition, two stations all have that normal discharge stirs, bypass stirring and high pressure argon gas stirs, accident agitating function, and in bottom blowing process, the intake pressure of gas, piping flow, rate of discharge and top hole pressure can be carried out to each pipeline and monitor, to reach best bottom blowing stirring effect.The utility model is particularly useful in steel-making refining furnace Ladle Bottom blowing process.
Accompanying drawing explanation
Fig. 1 is syndeton schematic diagram of the present utility model.
Fig. 2 is gas-distribution pipe line structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Refining furnace steel ladle bottom argon blowing control device as shown in Figure 1 and Figure 2, comprise monitoring equipment, housing, at least two distributing cabinets, ladle, operation boxs, described monitoring equipment and housing are arranged in Central Control Room, described distributing cabinet is arranged on scene, described operation box is arranged on scene, described ladle is arranged on LF refining furnace soft blow position and blowing position, arranges PLC distant station in described distributing cabinet.
In actual production, technical process of the present utility model varies in size due to each company steelworks ladle, thus the bottom blowing time in each stage and BOTTOM ARGON BLOWING amount different, but argon bottom-blowing flow process is similar, substantially be divided into 4 stages, a failure mode F, is respectively: soft blow Mode A; Normal mode B; Strong blowing mould formula C; Other blowing mould formula D.Technical process is :-clad decline opened to blowing position by ladle, thermometric, reinforced, start other blowing mould formula D-electrifying electrodes slag, deoxidation, normal mode B-stirring, strong blowing mould formula C-sampling, thermometric, soft blow Mode A-stirring, soft blow position outputed by other blowing mould formula D-buggy ladle, and soft blow Mode A-buggy ladle is opened to blowing position.In addition, for the application, preferably S7-300PLC and the PLC distant station in monitoring equipment, distributing cabinet, the touch-screen in operation box are connected by MPI cable and carry out real-time data communication in housing.
General, in order to ensure processing quality, Controlling System comprises soft blow position and blowing position, described two stations are provided with the on-the-spot local operation case with touch-screen, at these two stations, all need to carry out argon gas bottom blowing, so arrange two cover distributing cabinets, just according to processing requirement, soft blow position is different with the argon gas amount of blowing position, can arrange respectively in Controlling System.Because this Controlling System has two cover distributing cabinets, two-way bottom blowing pipeline, independently controls, does not interfere with each other, and respectively to two station ladle two-way bottom blowing brick air feed, the method adopting two-way to control respectively, can ensure the separate of two station Bottom blowing locations.
In order to the efficiency that blows is higher, the bottom blowing pipeline of each station, be divided into again the identical two-way argon gas of control to carry out bottom blowing, that is, each ladle is furnished with the two-way argon gas of identical control.Two stations all have that normal discharge stirs, bypass stirring and high pressure argon gas stirs, accident agitating function, and in bottom blowing process, the intake pressure of gas, piping flow, rate of discharge and top hole pressure can be carried out to each pipeline and monitor, to reach best bottom blowing stirring effect.
As shown in Figure 2, the argon gas source provided via workshop is controlled by total valve ball valve, and by gas filter filter cleaning, point three road gas pipings, when wherein two-way is accidental state up and down, carry out argon gas bottom blowing by automatically controlling to be switched to Non-follow control to ladle; Normal discharge stirring, bypass stirring and high pressure argon gas stir all by selecting the combination of variable valve group to realize required setting uninterrupted, thus realize its various function.When intermediate gas pipeline is for normally smelting, normal discharge stirs, setting reducing valve reaches required pressure, voltage stabilizing is carried out again by gas storage tank, buffer tank arranges pressure transmitter and carries out pressure detection, after buffer tank, be divided into identical two-way gas piping, be respectively normal discharge and stir and bypass stirring, its principle of work is identical with control principle.Pressure transmitter is installed additional in variable valve group, pressure detection and feedback, variable valve group is that the magnetic valve of 7 of being arranged on orifice plate plate is formed, adopt pulse coding technique (PCM) to control the orifice plate of the different latus rectum of the incompatible control of switches set of one group of variable valve group, thus realize required flow output.To be that argon flow amount is stable provide support current stabilization bag, vacuum breaker flows backwards to prevent argon gas, pressure transmitter and tensimeter show and feedback top hole pressure, flow counts display and feedback rate of discharge, realize PID closed-loop control, solenoid control diffusion valve is for after finishing blowing, and the remaining argon gas in pipeline diffuses.
Conveniently site operation personnel monitors in real time and operates, and two stations are provided with the operation box being with touch-screen respectively at the scene, according to the monitoring situation of touch-screen display, can select on-the-spot local operation.Remote monitoring and operation can complete on the monitoring equipment of Central Control Room.
After air blowing stirring terminates, flow backwards to prevent molten steel and enter gas permeable brick slit, affect the gas permeable brick life-span and air blowing stirs into power, in PLC program, arrange delay pulse signal, within the 20s time period, argon flow amount is on present flow rate basis, be reduced to 0 gradually, prevent molten steel from flowing backwards.
The relatively conventional argon blowing system of this Controlling System, easy and simple to handle, improve steel quality, improve the stationarity of electrode regulating, reduce the consumption such as argon gas, electrode, shorten the heat, eliminate various impurity in molten steel, adjust various chemical composition, control the links such as furnace temperature, all play an important role.In addition, take into account on-the-spot requirement in security, accessibility during system design, also carried out the process of various fault, thus ensure that whole system can be run safely and steadly.
Claims (6)
1. refining furnace steel ladle bottom argon blowing control device, comprise monitoring equipment, housing, at least two distributing cabinets, ladle, operation boxs, it is characterized in that: described monitoring equipment and housing are arranged in Central Control Room, described distributing cabinet is arranged on scene, described operation box is arranged on scene, described ladle is arranged on LF refining furnace soft blow position and blowing position, arranges PLC distant station in described distributing cabinet.
2. furnace steel ladle bottom argon blowing control device as claimed in claim 1, is characterized in that: described Controlling System comprises soft blow position and blowing position, and described two stations are provided with the on-the-spot local operation case with touch-screen.
3. refining furnace steel ladle bottom argon blowing control device as claimed in claim 1, is characterized in that: each ladle divides two-way gas piping to carry out bottom blowing.
4. the refining furnace steel ladle bottom argon blowing control device as described in claim 1,2 or 3, is characterized in that: be provided with gas-holder in described distributing cabinet.
5. the refining furnace steel ladle bottom argon blowing control device as described in claim 1,2 or 3, is characterized in that: be provided with current stabilization bag after variable valve group in distributing cabinet.
6. the refining furnace steel ladle bottom argon blowing control device as described in claim 1,2 or 3, is characterized in that: arrange magnetic valve after under meter in distributing cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520744251.0U CN204958970U (en) | 2015-09-24 | 2015-09-24 | Refining furnace ladle bottom blowing argon controlling means |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520744251.0U CN204958970U (en) | 2015-09-24 | 2015-09-24 | Refining furnace ladle bottom blowing argon controlling means |
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| CN204958970U true CN204958970U (en) | 2016-01-13 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151880A (en) * | 2016-08-29 | 2016-11-23 | 安徽伏斯特智能科技股份有限公司 | A kind of low discharge regulation system and control method thereof |
| CN110878915A (en) * | 2019-12-17 | 2020-03-13 | 中冶南方工程技术有限公司 | Converter bottom blowing pipeline state monitoring system |
| CN111518991A (en) * | 2020-05-08 | 2020-08-11 | 大冶特殊钢有限公司 | Argon flow control method and system and ladle refining furnace smelting method |
| CN111774559A (en) * | 2020-07-25 | 2020-10-16 | 莱芜钢铁集团银山型钢有限公司 | Device for improving blowing-through rate of steel ladle bottom-blown air brick and application method |
| CN113369470A (en) * | 2021-06-11 | 2021-09-10 | 马鞍山钢铁股份有限公司 | Continuous casting rotary table ladle bottom argon blowing equipment and using method thereof |
-
2015
- 2015-09-24 CN CN201520744251.0U patent/CN204958970U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151880A (en) * | 2016-08-29 | 2016-11-23 | 安徽伏斯特智能科技股份有限公司 | A kind of low discharge regulation system and control method thereof |
| CN106151880B (en) * | 2016-08-29 | 2019-03-26 | 安徽伏斯特智能科技股份有限公司 | A kind of small flow control system and its adjusting method |
| CN110878915A (en) * | 2019-12-17 | 2020-03-13 | 中冶南方工程技术有限公司 | Converter bottom blowing pipeline state monitoring system |
| CN111518991A (en) * | 2020-05-08 | 2020-08-11 | 大冶特殊钢有限公司 | Argon flow control method and system and ladle refining furnace smelting method |
| CN111774559A (en) * | 2020-07-25 | 2020-10-16 | 莱芜钢铁集团银山型钢有限公司 | Device for improving blowing-through rate of steel ladle bottom-blown air brick and application method |
| CN111774559B (en) * | 2020-07-25 | 2022-06-28 | 莱芜钢铁集团银山型钢有限公司 | Device for improving blowing-through rate of steel ladle bottom blowing air brick and application method |
| CN113369470A (en) * | 2021-06-11 | 2021-09-10 | 马鞍山钢铁股份有限公司 | Continuous casting rotary table ladle bottom argon blowing equipment and using method thereof |
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