CN102748948A - Control method and control system for smelting process of crucible line-frequency electric induction furnace - Google Patents
Control method and control system for smelting process of crucible line-frequency electric induction furnace Download PDFInfo
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- CN102748948A CN102748948A CN2012102393701A CN201210239370A CN102748948A CN 102748948 A CN102748948 A CN 102748948A CN 2012102393701 A CN2012102393701 A CN 2012102393701A CN 201210239370 A CN201210239370 A CN 201210239370A CN 102748948 A CN102748948 A CN 102748948A
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- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000003723 Smelting Methods 0.000 title claims abstract description 31
- 230000006698 induction Effects 0.000 title abstract description 24
- 238000007499 fusion processing Methods 0.000 claims description 38
- 238000002844 melting Methods 0.000 claims description 26
- 230000008018 melting Effects 0.000 claims description 26
- 230000001143 conditioned effect Effects 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 description 15
- 229910052751 metal Inorganic materials 0.000 description 15
- 230000004907 flux Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
The invention provides a control method for the smelting process of a crucible line-frequency electric induction furnace. The control method comprises the following steps of: measuring the operating voltage of the electric furnace and the smelting temperature of furnace charge in real time; when the operating voltage and the operating power of the electric furnace, the smelting temperature of the furnace charge and the operating time of the electric furnace under the condition that voltage value is preset meet the preset conditions, adjusting the operating voltage of the electric furnace according to the preset voltage value; in first charging, adding the furnace charge with the weight being 50%-60% of the total weight of the furnace charge into the crucible line-frequency electric induction furnace; and in second charging, adding the remaining furnace charge. The control method and system provided by the invention has the advantages that in the smelting process of the furnace charge, according to the condition that the operating voltage and the operating power of the electric furnace, the smelting temperature of the furnace charge and the operating time of the electric furnace under the condition that the voltage value is preset meet the preset conditions, the operating voltage of the electric furnace is adjusted, so that the working efficiency of the electric furnace is improved and the energy consumption is reduced.
Description
Technical field
The application relates to the Metal Melting technical field, particularly a kind of control method of crucible type line frequency furnace fusion process and control system.
Background technology
Electric induction furnace is to utilize the induced electricity effect of metalliferous material and the electric furnace that makes material heating or fusing, and line frequency furnace is that electric current (50 or 60 hertz) with industrial frequency is as the electric induction furnace of power supply.
Coreless inductio furnace sketch map as shown in Figure 1 comprises metal charge 001, refractory crucible 002, induction coil 003, magnetic conductor 004 and framework 005.The induction coil that is turned to by copper pipe is around the crucible outside, and metal charge is contained in the crucible.When induction coil passes to alternating current, produce the longitudinal magnetic flux of alternation, a part of magnetic flux passes metal charge, in the certain depth of metal charge surface, produces induced-current, and therefore metal charge generates heat up to fusing.In the heating process of whole metal charge, heat transmits to the center from the metal charge surface, and up to whole metal charge fusings, melting finishes.
At present in the fusion process of power frequency coreless inductio furnace commonly used; The general ceiling voltage that adopts furnace charge to be fused into the later period of metal liquid is a upper voltage limit; The fixed value of the upper voltage limit of electric furnace for setting, and the voltage of electric furnace remains on the upper voltage limit operation in fusion process.
The resistance of metal charge changes a lot along with the rising of temperature in the process of melting, when the voltage of electric furnace is definite value, causes the ability of electric furnace can not obtain maximum performance, and efficient is low.So, in the fusion process of line frequency furnace, adopt fixed value voltage, the inefficiency of electric furnace, energy consumption height.
Summary of the invention
In view of this, the application provides a kind of control method and control system of crucible type line frequency furnace fusion process, regulates control through the voltage to electric furnace in fusion process, improves the operating efficiency of electric furnace.
A kind of control method of crucible type line frequency furnace fusion process comprises:
The furnace charge that in the crucible type line frequency furnace, adds first predetermined amount; Keep the working voltage of said electric furnace to maintain the first predeterminated voltage value; Detect the operate power of said electric furnace in real time; When the operate power of said electric furnace reduces, the operate power of regulating said electric furnace according to preset set value of the power, and the working voltage of said electric furnace is increased to the second predeterminated voltage value by the first predeterminated voltage value;
When the working voltage of said electric furnace reaches the second predeterminated voltage value; Remove the power adjusting control of said electric furnace; And the working voltage that keeps said electric furnace is the said second predeterminated voltage value; When the running time of said electric furnace under the said second predeterminated voltage value condition satisfying the first Preset Time value, in electric furnace, add the furnace charge of second predetermined amount;
When the running time of said electric furnace under the said second predeterminated voltage value condition satisfying the second Preset Time value; The working voltage of said electric furnace is reduced to the 3rd predeterminated voltage value by the second predeterminated voltage value; When the working voltage of said electric furnace reaches the 3rd predeterminated voltage value; The working voltage that keeps said electric furnace is said the 3rd predeterminated voltage value, when the smelting temperature of furnace charge in the said electric furnace reaches preset temperature, finishes melting.
Above-mentioned control method, preferred, said first predetermined amount is 50% ~ 60% of first predetermined amount and the second predetermined amount sum.
Above-mentioned control method, preferred, the process that in electric furnace, adds furnace charge is for continuing reinforced process.
Above-mentioned control method, preferred, also comprise:
To in the working voltage of said electric furnace, operate power, the smelting temperature of running time and furnace charge under pre-conditioned at least one show.
Above-mentioned control method, preferred, also comprise:
When the working voltage of said electric furnace, operate power or arbitrary when exceeding its corresponding preset scope in the running time under pre-conditioned, trigger alarm.
Above-mentioned control method, preferred, also comprise:
Melting is toppled over the furnace charge in the said electric furnace to go out after finishing fully.
A kind of control system of crucible type line frequency furnace fusion process comprises:
Voltage measurement module is used for measuring in real time the working voltage of real-time electric furnace;
Temperature-measuring module is used for measuring in real time the smelting temperature in the said electric furnace;
First voltage control module; After being used in said electric furnace, adding the furnace charge of first predetermined amount; When the working voltage that obtains the said electric furnace that voltage measurement module measures reached the first predeterminated voltage value, the working voltage that keeps said electric furnace was the said first predeterminated voltage value;
Power measurement module is used for measuring in real time the operate power of said electric furnace;
Second voltage control module, be used for when said electric furnace under the said first predeterminated voltage value condition, when the operate power of said electric furnace reduces, the working voltage of said electric furnace is increased to the second predeterminated voltage value by the first predeterminated voltage value;
Power control module; After the working voltage that is used for said furnace charge reaches the first predeterminated voltage value; When the operate power of said electric furnace reduces; The operate power that the preset set value of the power of foundation is regulated said electric furnace, and when the working voltage of said electric furnace reaches the second predeterminated voltage value, remove the power adjusting control of said electric furnace;
The tertiary voltage control module; Be used for when the running time of said electric furnace under the said second predeterminated voltage value condition satisfying the second Preset Time value, the working voltage of said electric furnace is reduced to the 3rd predeterminated voltage value and is remained on said the 3rd predeterminated voltage value by the said second predeterminated voltage value.
Above-mentioned control system, preferred, also comprise:
Reinforced control module is used for the adding according to said first predetermined amount and said second predetermined amount control furnace charge.
Above-mentioned control system, preferred, also comprise:
Display module, at least one of smelting temperature who is used for working voltage, operate power, the running time under pre-conditioned and furnace charge to said electric furnace shows.
Above-mentioned control system, preferred, also comprise:
Alarm module, it is arbitrary when exceeding its corresponding preset scope to be used for working voltage, operate power or running time under pre-conditioned when said electric furnace, triggers alarm.
A kind of control method of crucible type line frequency furnace fusion process; Comprise: the furnace charge that in the crucible type line frequency furnace, adds first predetermined amount; Keep the working voltage of said electric furnace to maintain the first predeterminated voltage value, detect the operate power of said electric furnace in real time, when the operate power of said electric furnace reduces; The operate power of regulating said electric furnace according to preset set value of the power, and the working voltage of said electric furnace is increased to the second predeterminated voltage value by the first predeterminated voltage value; When the working voltage of said electric furnace reaches the second predeterminated voltage value; Remove the power adjusting control of said electric furnace; And the working voltage that keeps said electric furnace is the said second predeterminated voltage value; When the running time of said electric furnace under the said second predeterminated voltage value condition satisfying the first Preset Time value, in electric furnace, add the furnace charge of second predetermined amount; When the running time of said electric furnace under the said second predeterminated voltage value condition satisfying the second Preset Time value; The working voltage of said electric furnace is reduced to the 3rd predeterminated voltage value by the second predeterminated voltage value; When the working voltage of said electric furnace reaches the 3rd predeterminated voltage value; The working voltage that keeps said electric furnace is said the 3rd predeterminated voltage value, when the smelting temperature of furnace charge in the said electric furnace reaches preset temperature, finishes melting.Adopt the control method of a kind of crucible type line frequency furnace fusion process of the application, in the furnace charge fusion process, the working voltage of electric furnace regulated according to the progress of melting, improved electric furnace operating efficiency, cut down the consumption of energy.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the application embodiment; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiment of the application, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the coreless inductio furnace sketch map;
Fig. 2 is the flow chart of the control method embodiment 1 of a kind of crucible type line frequency furnace of the application fusion process;
Fig. 3 is the flow chart of the control method embodiment 2 of a kind of crucible type line frequency furnace of the application fusion process;
Fig. 4 is the flow chart of the control method embodiment 3 of a kind of crucible type line frequency furnace of the application fusion process;
Fig. 5 is the structural representation of the control system embodiment 1 of a kind of crucible type line frequency furnace of the application fusion process;
Fig. 6 is the structural representation of the control system embodiment 2 of a kind of crucible type line frequency furnace of the application fusion process;
Fig. 7 is the structural representation of the control system embodiment 3 of a kind of crucible type line frequency furnace of the application fusion process.
The specific embodiment
To combine the accompanying drawing among the application embodiment below, the technical scheme among the application embodiment is carried out clear, intactly description, obviously, described embodiment only is the application's part embodiment, rather than whole embodiment.Based on the embodiment among the application, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the application's protection.
The control method of a kind of crucible type line frequency furnace fusion process of the present invention and control system applies are on the crucible type line frequency furnace that casting iron is used; After each melting finishes; Furnace charge in the said electric furnace is toppled over fully, and promptly every melting one stove furnace charge need empty once furnace.
In actual the enforcement, every stove smelting time is about 2 hours.
Application number is in 85107606 the patent a kind of circuit that can regulate the electric furnace operate power to be provided, and according to the circuit in this patent, can regulate the electric furnace operate power.
Referring to Fig. 2, show the flow chart of the control method embodiment 1 of a kind of crucible type line frequency furnace of the application fusion process, comprising:
Step S101: the furnace charge that in the crucible type line frequency furnace, adds first predetermined amount; Keep the working voltage of said electric furnace to maintain the first predeterminated voltage value; Detect the operate power of said electric furnace in real time; When the operate power of said electric furnace reduces, the operate power of regulating said electric furnace according to preset set value of the power, and the working voltage of said electric furnace is increased to the second predeterminated voltage value by the first predeterminated voltage value;
Melting begins; The furnace charge that in the crucible type line frequency furnace, adds first predetermined amount, first predetermined amount is measured the working voltage of electric furnace in real time for adding 50% ~ 60% of furnace charge total amount; When said working voltage does not reach the first predeterminated voltage value; Regulate this working voltage to the first predeterminated voltage value, when the working voltage of said electric furnace reached the first predeterminated voltage value, the working voltage that keeps electric furnace was in this first predeterminated voltage value.
When the induction coil of electric induction furnace passes to alternating current, produce the longitudinal magnetic flux of alternation, a part of magnetic flux passes furnace charge, in the certain depth of furnace charge surface, produces induced-current, and furnace charge begins heating, and temperature raises.
The working voltage that keeps electric induction furnace is when the first predeterminated voltage value; Measure the operate power of electric induction furnace in real time, because the characteristic of metal, the metal charge in the electric induction furnace is along with temperature raises; Can raise when charging resistance begins, cause the power of electric furnace to begin to descend.
When the operate power that detects electric induction furnace reduces; The operate power that the preset set value of the power of foundation is regulated said electric furnace; The operate power of regulating electric induction furnace is to preset set value of the power scope, and the working voltage of this electric furnace is promoted to the second predeterminated voltage value by the first predeterminated voltage value.
Reinforced in the fusion process is divided into twice, once adds 50% ~ 60% of total feeding quantity when being incorporated as melting first and beginning.
In actual the enforcement, the furnace charge amount that adds first is more, and the installed capacity of power supply is also higher accordingly, provides sufficient to guarantee the electric weight in the fusion process.
Step S 102: when the working voltage of said electric furnace reaches the second predeterminated voltage value; Remove the power adjusting control of said electric furnace; And the working voltage that keeps said electric furnace is the said second predeterminated voltage value; When the running time of said electric furnace under the said second predeterminated voltage value condition satisfying the first Preset Time value, in electric furnace, add the furnace charge of second predetermined amount;
Because the relevance of voltage and power when the working voltage of electric furnace reaches the second predeterminated voltage value, is removed the power adjusting control of electric furnace, no longer the power of electric furnace is controlled.
The working voltage of electric furnace moves under the second predeterminated voltage value condition; Propelling along with smelting time; The temperature of furnace charge continues to raise; When the working voltage of electric furnace when the second predeterminated voltage value condition satisfies the first Preset Time value following running time, changing appears in charging resistance, begins in electric furnace, to add the furnace charge of second predetermined amount this moment.
Reinforced being divided into twice in the fusion process:
When beginning for melting for the first time, adition process is for continuing adition process, and the reinforced duration generally reaches about 5min, and addition is for adding 50% ~ 60% of furnace charge total amount;
For the second time for when the running time of said electric furnace under said second predeterminated voltage value condition during the satisfied first Preset Time value; Adding the furnace charge process is that segmentation continues reinforced process; And before lasting till that melting finishes, and addition is remaining whole furnace charge, promptly remaining 40% ~ 50%.
In actual the enforcement, the first Preset Time value can be set according to production technology.
In actual the enforcement; Twice reinforced feed hopper that generally all need shake frequently feeds in raw material; Be packed for preventing an overcharge; Reinforced is a process that continues to feed in raw material, and according to the size and the operational possibility of top, molten bath headspace, combined process design and melting economy are controlled reinforced process.
Step S 103: when the running time of said electric furnace under the said second predeterminated voltage value condition satisfying the second Preset Time value; The working voltage of said electric furnace is reduced to the 3rd predeterminated voltage value by the second predeterminated voltage value; When the working voltage of said electric furnace reaches the 3rd predeterminated voltage value; The working voltage that keeps said electric furnace is said the 3rd predeterminated voltage value, when the smelting temperature of furnace charge in the said electric furnace reaches preset temperature, finishes melting.
Continue in electric furnace, to add the furnace charge of second predetermined amount, along with the propelling of smelting time, when electric furnace when the second predeterminated voltage value condition satisfies the second Preset Time value following running time; Charging status further changes; Charging resistance reduces, and for the electrical power that guarantees electric furnace is stable, electrical efficiency is high; Control reduces the working voltage of electric furnace, is reduced to the 3rd predeterminated voltage value by the second predeterminated voltage value.
The working voltage that keeps electric furnace is measured the smelting temperature of furnace charge in the electric furnace in the 3rd predeterminated voltage value, and when the smelting temperature of furnace charge reached preset temperature in recording electric furnace, furnace charge all was molten into liquid state, and melting finishes.
In actual the enforcement, the second Preset Time value can be set according to production technology.
In actual the enforcement, preset temperature can be adjusted and set according to the arts demand of reality.
Because power can carry out simple computation by voltage and current and obtain; During actual enforcement,, also can adopt running current to detect to electric induction furnace to the step that power is measured in real time; The preset value of running current is set, the control of power also can be obtained through the control to running current.
Crucible type line frequency furnace with rated power 6MW, specified heat size 20t is an example; First predetermined amount of furnace charge is 10t ~ 12t, and the charging weight that promptly in electric furnace, adds for the first time is 10t ~ 12t, and the first predeterminated voltage value is 2400V; The second predeterminated voltage value is 3000V; The 3rd predeterminated voltage value size is identical with the first predeterminated voltage value, is 2400V, and the nominal operation power of electric furnace is 6MW.
The fusion process of this 20t electric induction furnace is:
In electric furnace, adding weight is the furnace charge of 10t ~ 12t; Measure the working voltage of electric furnace in real time, when said working voltage does not reach 2400V, regulate this working voltage to 2400V; When the working voltage of said electric furnace reaches 2400V, keep the domain of walker of the working voltage of electric furnace at 2400V;
The working voltage that keeps electric furnace is measured the operate power in the electric furnace in real time at 2400V, when the power of this furnace charge begins to descend, keeps the current operate power of electric furnace, and the working voltage of electric furnace is promoted to 3000V by 2400V;
The working voltage that keeps electric furnace is at 3000V; When the working voltage of electric furnace when the 3000V condition satisfies the first Preset Time value following running time; The conductive strips overall electrical resistance that resistance is formed between the furnace charge descends; Remove the power stability control of electric furnace, the power bottom out of electric furnace, the remaining furnace charge of adding in electric furnace (10t ~ 8t);
After reinforced the completion, along with the propelling of smelting time, when the working voltage of electric furnace move the satisfied second Preset Time value under the 3000V condition; Furnace charge in the electric furnace is by the solid-state liquid state that becomes, and control reduces the working voltage of electric furnace to 2400V, keeps working voltage at 2400V; Measure the smelting temperature of furnace charge; When the smelting temperature of furnace charge arrived preset temperature in recording electric furnace, furnace charge all was molten into liquid state, and melting finishes.
Referring to Fig. 3, show the flow chart of control method embodiment 2 of the fusion process of a kind of crucible type line frequency furnace of the application, present embodiment is after the step S103 of embodiment 1, also to comprise:
Step S104: in the working voltage of said electric furnace, operate power, the smelting temperature of running time and furnace charge under pre-conditioned at least one show.
For each item index that electric furnace is carried out in the fusion process is monitored; To the running time under the operate power of the working voltage of electric furnace, electric furnace, electric furnace pre-conditioned and the smelting temperature of furnace charge showing that items displayed can be any or any several.
Referring to Fig. 4, show the flow chart of control method embodiment 3 of the fusion process of a kind of crucible type line frequency furnace of the application, present embodiment is after the step S104 of embodiment 2, also to comprise:
Step S105:, trigger alarm when the working voltage of said electric furnace, operate power or arbitrary when exceeding its corresponding preset scope in the running time under pre-conditioned.
In the actual production; Each preset value can not fully precisely reach, and can preestablish domain of walker or excursion, when the working voltage in the electric furnace running, operate power and the running time under pre-conditioned are all in its corresponding scope; The expression fusion process is stable; When wherein each exceeds domain of walker, trigger alarm and report to the police, and off-limits project is shown.
The control method embodiment of a kind of crucible type line frequency furnace fusion process that provides with above-mentioned the application is corresponding, and the application also provides a kind of control system embodiment of crucible type line frequency furnace fusion process.
Referring to Fig. 5; Show the structural representation of the control system embodiment 1 of a kind of crucible type line frequency furnace of the application fusion process, this control system comprises: voltage measurement module 101, temperature-measuring module 102, first voltage control module 103, power measurement module 104, power control module 105, second voltage control module 106, tertiary voltage control module 107 and reinforced control module 108.
Melting begins, and in the crucible type line frequency furnace, adds the furnace charge of first predetermined amount, and first predetermined amount is for adding 50% ~ 60% of furnace charge total amount, and voltage measurement module 101 is measured the working voltage of electric furnace in real time.
Begin from melting, the real-time working voltage of 101 pairs of electric furnaces of voltage measurement module is measured, and the real-time temperature of furnace charge is measured in 102 pairs of electric furnaces of temperature-measuring module, and the real-time operate power of 104 pairs of electric furnaces of power measurement module is measured.
When said working voltage does not reach the first predeterminated voltage value; Regulate this working voltage to the first predeterminated voltage value; When the working voltage of said electric furnace reached the first predeterminated voltage value, the working voltage that first voltage control module 103 keeps electric furnace was in this first predeterminated voltage value.
When the induction coil of electric induction furnace passes to alternating current, produce the longitudinal magnetic flux of alternation, a part of magnetic flux passes furnace charge, in the certain depth of furnace charge surface, produces induced-current, and furnace charge begins heating, and temperature raises.
The working voltage that keeps electric induction furnace is when the first predeterminated voltage value; Power measurement module 104 is measured the operate power of electric induction furnace in real time, because the characteristic of metal, the metal charge in the electric induction furnace is along with temperature raises; Can raise when charging resistance begins, cause the power of electric furnace to begin to descend.
When the operate power that detects electric induction furnace reduces; The operate power that power control module 105 is regulated said electric furnace according to preset set value of the power; The operate power of regulating electric induction furnace is to preset set value of the power scope, and second voltage control module 106 is promoted to the second predeterminated voltage value with the working voltage of this electric furnace by the first predeterminated voltage value.
The working voltage of electric furnace moves under the second predeterminated voltage value condition; Along with the propelling of smelting time, the resistance of furnace charge descends, when the working voltage of electric furnace when the second predeterminated voltage value condition satisfies the first Preset Time value following running time; The conductive strips overall electrical resistance that resistance is formed between the furnace charge descends; The power bottom out of electric furnace, this moment, the power stability of power control module 105 releasing electric furnaces was controlled, and in electric furnace, added the furnace charge of second predetermined amount.
Feeding in raw material is divided into twice by reinforced control module 108 controls for reinforced in the fusion process, once adds 50% ~ 60% of total feeding quantity when being incorporated as melting first and beginning.
When beginning for melting for the first time, adition process is for continuing adition process, and the reinforced duration generally reaches about 5min, and addition is for adding 50% ~ 60% of furnace charge total amount;
For the second time for when the running time of said electric furnace under said second predeterminated voltage value condition during the satisfied first Preset Time value; Adding the furnace charge process is that segmentation continues reinforced process; And before lasting till that melting finishes, and addition is remaining whole furnace charge, promptly remaining 40% ~ 50%.
Propelling along with smelting time; When electric furnace when satisfying the second Preset Time value second predeterminated voltage value condition following running time; Charging status further changes, and charging resistance reduces, and is the stable and electrical efficiency height of electrical power that guarantees electric furnace; 107 controls of tertiary voltage control module reduce the working voltage of electric furnace, are reduced to the 3rd predeterminated voltage value by the second predeterminated voltage value.
Tertiary voltage control module 107 keeps the working voltage of electric furnaces in the 3rd predeterminated voltage value, and when temperature-measuring module 102 recorded that the smelting temperature of furnace charge reaches preset temperature in the electric furnace, furnace charge all was molten into liquid state, reaches the melting requirement, and melting finishes.
Referring to Fig. 6; Show the structural representation of control system embodiment 2 of the fusion process of a kind of crucible type line frequency furnace of the application; Present embodiment is in the system that embodiment 1 provides, to comprise: display module 109, the working voltage, power, the running time under pre-conditioned and at least one of the smelting temperature of furnace charge that are used for said electric furnace show.
For each item index that electric furnace is carried out in the fusion process is monitored; The running time under the working voltage of 109 pairs of electric furnaces of display module, the power of electric furnace, electric furnace pre-conditioned and the smelting temperature of furnace charge show that items displayed can be any or any several.
Referring to Fig. 7; Show the structural representation of control system embodiment 3 of the fusion process of a kind of crucible type line frequency furnace of the application; Present embodiment is in the system that provides of embodiment 2, also to comprise: alarm module 110; It is arbitrary when exceeding its corresponding preset scope to be used for working voltage, operate power or running time under pre-conditioned when said electric furnace, triggers alarm.
In the actual production; Each preset value can not fully precisely reach, and can preestablish domain of walker, when the working voltage in the electric furnace running, operate power and the running time under pre-conditioned are all in its corresponding scope; The expression fusion process is stable; When wherein each exceeds domain of walker, alarm module 110 triggers alarms and reports to the police, and in display module 109, off-limits project is shown.
In actual the enforcement, can be in each module all excursion and the domain of walker of design and operation voltage, operate power, each module is regulated the operation of electric furnace according to this scope.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and the difference of other embodiment that same or similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the application.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation of spirit that does not break away from the application or scope in other embodiments among this paper.Therefore, the application will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (10)
1. the control method of a crucible type line frequency furnace fusion process is characterized in that, comprising:
The furnace charge that in the crucible type line frequency furnace, adds first predetermined amount; Keep the working voltage of said electric furnace to maintain the first predeterminated voltage value; Detect the operate power of said electric furnace in real time; When the operate power of said electric furnace reduces, the operate power of regulating said electric furnace according to preset set value of the power, and the working voltage of said electric furnace is increased to the second predeterminated voltage value by the first predeterminated voltage value;
When the working voltage of said electric furnace reaches the second predeterminated voltage value; Remove the power adjusting control of said electric furnace; And the working voltage that keeps said electric furnace is the said second predeterminated voltage value; When the running time of said electric furnace under the said second predeterminated voltage value condition satisfying the first Preset Time value, in electric furnace, add the furnace charge of second predetermined amount;
When the running time of said electric furnace under the said second predeterminated voltage value condition satisfying the second Preset Time value; The working voltage of said electric furnace is reduced to the 3rd predeterminated voltage value by the second predeterminated voltage value; When the working voltage of said electric furnace reaches the 3rd predeterminated voltage value; The working voltage that keeps said electric furnace is said the 3rd predeterminated voltage value, when the smelting temperature of furnace charge in the said electric furnace reaches preset temperature, finishes melting.
2. control method according to claim 1 is characterized in that, said first predetermined amount is 50% ~ 60% of first predetermined amount and the second predetermined amount sum.
3. control method according to claim 1 is characterized in that, the process that in electric furnace, adds furnace charge is for continuing reinforced process.
4. control method according to claim 1 is characterized in that, also comprises:
To in the working voltage of said electric furnace, operate power, the smelting temperature of running time and furnace charge under pre-conditioned at least one show.
5. control method according to claim 2 is characterized in that, also comprises:
When the working voltage of said electric furnace, operate power or arbitrary when exceeding its corresponding preset scope in the running time under pre-conditioned, trigger alarm.
6. control method according to claim 1 is characterized in that, also comprises:
Melting is toppled over the furnace charge in the said electric furnace to go out after finishing fully.
7. the control system of a crucible type line frequency furnace fusion process is characterized in that, comprising:
Voltage measurement module is used for measuring in real time the working voltage of said electric furnace;
Temperature-measuring module is used for measuring in real time the smelting temperature in the said electric furnace;
First voltage control module; After being used in said electric furnace, adding the furnace charge of first predetermined amount; When the working voltage that obtains the said electric furnace that voltage measurement module measures reached the first predeterminated voltage value, the working voltage that keeps said electric furnace was the said first predeterminated voltage value;
Power measurement module is used for measuring in real time the operate power of said electric furnace;
Second voltage control module, be used for when said electric furnace under the said first predeterminated voltage value condition, when the operate power of said electric furnace reduces, the working voltage of said electric furnace is increased to the second predeterminated voltage value by the first predeterminated voltage value;
Power control module; After the working voltage that is used for said furnace charge reaches the first predeterminated voltage value; When the operate power of said electric furnace reduces; The operate power that the preset set value of the power of foundation is regulated said electric furnace, and when the working voltage of said electric furnace reaches the second predeterminated voltage value, remove the power adjusting control of said electric furnace;
The tertiary voltage control module; Be used for when the running time of said electric furnace under the said second predeterminated voltage value condition satisfying the second Preset Time value, the working voltage of said electric furnace is reduced to the 3rd predeterminated voltage value and is remained on said the 3rd predeterminated voltage value by the said second predeterminated voltage value.
8. control according to claim 7 system is characterized in that, also comprises:
Reinforced control module is used for the adding according to said first predetermined amount and said second predetermined amount control furnace charge.
9. control according to claim 7 system is characterized in that, also comprises:
Display module, at least one of smelting temperature who is used for working voltage, operate power, the running time under pre-conditioned and furnace charge to said electric furnace shows.
10. control according to claim 8 system is characterized in that, also comprises:
Alarm module, it is arbitrary when exceeding its corresponding preset scope to be used for working voltage, operate power or running time under pre-conditioned when said electric furnace, triggers alarm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210239370.1A CN102748948B (en) | 2012-07-11 | 2012-07-11 | Control method and control system for smelting process of crucible line-frequency electric induction furnace |
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| CN201210239370.1A CN102748948B (en) | 2012-07-11 | 2012-07-11 | Control method and control system for smelting process of crucible line-frequency electric induction furnace |
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| CN102748948A true CN102748948A (en) | 2012-10-24 |
| CN102748948B CN102748948B (en) | 2014-05-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110749192A (en) * | 2019-10-24 | 2020-02-04 | 衢州学院 | Temperature control method and device for intermediate frequency furnace |
| CN110883322A (en) * | 2019-12-18 | 2020-03-17 | 海安县恒益滑动轴承有限公司 | Frequency-conversion power-regulation detachable power-frequency coreless inductor continuous casting furnace and use method thereof |
| CN111961888A (en) * | 2020-08-10 | 2020-11-20 | 兴和县山河特钢有限公司 | Environment-friendly pollution-free silicon-manganese alloy smelting process |
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| JPS61198312A (en) * | 1985-02-28 | 1986-09-02 | Toyota Motor Corp | Operation controller of low frequency induction furnace |
| CN1063153A (en) * | 1992-02-01 | 1992-07-29 | 郑锡金 | A kind of arc furnace power controling method |
| JPH07133988A (en) * | 1993-11-11 | 1995-05-23 | Mitsubishi Materials Corp | Metal layer sensor for melting furnace |
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| JPS61198312A (en) * | 1985-02-28 | 1986-09-02 | Toyota Motor Corp | Operation controller of low frequency induction furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110749192A (en) * | 2019-10-24 | 2020-02-04 | 衢州学院 | Temperature control method and device for intermediate frequency furnace |
| CN110749192B (en) * | 2019-10-24 | 2021-02-02 | 衢州学院 | Temperature control method and device for intermediate frequency furnace |
| CN110883322A (en) * | 2019-12-18 | 2020-03-17 | 海安县恒益滑动轴承有限公司 | Frequency-conversion power-regulation detachable power-frequency coreless inductor continuous casting furnace and use method thereof |
| CN111961888A (en) * | 2020-08-10 | 2020-11-20 | 兴和县山河特钢有限公司 | Environment-friendly pollution-free silicon-manganese alloy smelting process |
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| CN102748948B (en) | 2014-05-21 |
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Application publication date: 20121024 Assignee: Chongqing blue Winfrey Technology Co.,Ltd. Assignor: Zhang Yubin Contract record no.: 2017500000001 Denomination of invention: Control method and control system for smelting process of crucible line-frequency electric induction furnace Granted publication date: 20140521 License type: Exclusive License Record date: 20170203 |
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