CN106766972A - A kind of charge level control method of three-phase alternating current mineral hot furnace - Google Patents
A kind of charge level control method of three-phase alternating current mineral hot furnace Download PDFInfo
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- CN106766972A CN106766972A CN201611154307.2A CN201611154307A CN106766972A CN 106766972 A CN106766972 A CN 106766972A CN 201611154307 A CN201611154307 A CN 201611154307A CN 106766972 A CN106766972 A CN 106766972A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0075—Regulation of the charge quantity
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Abstract
The present invention relates to three-phase alternating current mineral hot furnace operational control technical field, more particularly to a kind of charge level control method of three-phase alternating current mineral hot furnace.The method includes：Make to form charge level difference in height between strong phase electrode and weak phase electrode；The flame intensity checked at strong phase electrode and weak phase electrode, if flame intensity is consistent, keeps the charge level difference in height between original strong phase electrode and weak phase electrode；If the flame intensity at strong phase electrode increases charge level difference in height more than the flame intensity at weak phase electrode；If the flame intensity at strong phase electrode reduces charge level difference in height less than the flame intensity at weak phase electrode.The charge level control method of the three-phase alternating current mineral hot furnace that the present invention is provided, in the case where the electric furnace do not powered to three-phase transformer carries out single-phase transformation with short net transformation, electric furnace can be improved and enter stove power and electric furnace efficiency, improve electric furnace yield, reduce supplies consumption, operative's intensity is reduced, improves high-temperature work environment.
Description
Technical field
The present invention relates to three-phase alternating current mineral hot furnace operational control technical field, more particularly to a kind of three-phase alternating current mineral hot furnace
Charge level control method.
Background technology
The three-phase alternating current mineral hot furnace that current separate unit three-phase transformer is powered, using three-phase primary current, power, an electricity
The highly consistent control stove mode of electrode current, electrode voltage almost symmetry, charge level is operated.Although parameter is symmetrical in itself for transformer, by
When three-phase transformer is powered relative to electric furnace three-phase electrode power short networking footpath length difference it is larger, cause short net pressure drop phase
Difference is larger, and in the case of transformer primary current identical, the actual motion voltage phase difference of three-phase electrode is more, and ceiling voltage is inclined
Difference may be close to 30%, cause apart from the distant weak phase electrode crucible of transformer it is small, the bed of material is thick, charge level poor air permeability, material
Layer and crucible power distribution serious unbalance, cause electric furnace be chronically at into stove power it is low, the working of a furnace is poor, the consumption of material electrode paste is high,
Yield poorly, pierce that fiery serious, operative's intensity is big, electric furnace whole efficiency it is low in the state of run, had a strong impact on Yield and quality
With consumption.
The content of the invention
(1) technical problem to be solved
It is an object of the invention to provide a kind of charge level control method of three-phase alternating current mineral hot furnace, existing three-phase alternating current ore deposit is solved
Electric furnace existing for the highly consistent control stove mode of charge level that hot stove is used enters that stove power is low with electric furnace efficiency, and electric furnace yields poorly,
The big problem of supplies consumption.
(2) technical scheme
In order to solve the above-mentioned technical problem, the invention provides a kind of charge level control method of three-phase alternating current mineral hot furnace, tool
Body comprises the following steps：
By tremie pipe and distributing device to persistently being fed in stove, make to form charge level highly between strong phase electrode and weak phase electrode
Charge level at difference, and strong phase electrode highly be higher than charge level at weak phase electrode highly；
During charging, whether the flame intensity checked at strong phase electrode is consistent with the flame intensity at weak phase electrode；
If flame intensity is consistent, the charge level difference in height between original strong phase electrode and weak phase electrode is kept during charging；
If the flame intensity at strong phase electrode is more than the flame intensity at weak phase electrode, adjusted during charging strong phase electrode with
Feeding quantity between weak phase electrode, increases the charge level difference in height between strong phase electrode and weak phase electrode, until flame intensity is consistent；
If the flame intensity at strong phase electrode is less than the flame intensity at weak phase electrode, adjusted during charging strong phase electrode with
Feeding quantity between weak phase electrode, reduces the charge level difference in height between strong phase electrode and weak phase electrode, until flame intensity is consistent.
Specifically, the charge level difference in height between strong phase electrode and weak phase electrode is 200~400mm.
Further, the charge level control method of described three-phase alternating current mineral hot furnace also includes：
Stockpile is set with weak phase surrounding them in strong phase electrode respectively, the material stack height in strong phase surrounding them is provided with
Higher than the material stack height for being arranged on weak phase surrounding them；
Judge whether strong phase surrounding them occurs thorn fire by checking furnace flame situation；
If strong phase surrounding them occurs thorn fire, the material stack height of strengthening phase surrounding them is increased during charging, while increase is strong
Charge level difference in height between phase electrode and weak phase electrode.
Specifically, the material stack height of strong phase surrounding them is arranged on for 280~320mm, is arranged on weak phase surrounding them
Material stack height is 180~220mm.
Further, the charge level control method of described three-phase alternating current mineral hot furnace also includes：
By checking the flame intensity or current value or magnitude of voltage of strong phase electrode and weak phase electrode, judge strong phase electrode with it is weak
The charge level gas permeability of phase surrounding them；
If the current value of strong phase electrode is more than pre-set current value, or the magnitude of voltage of strong phase electrode is less than preset voltage value, or
Flame intensity at strong phase electrode then judges the charge level gas permeability of strong phase surrounding them less than the flame intensity at weak phase electrode
Difference；
If the flame intensity at weak phase electrode judges the material of weak phase surrounding them less than the flame intensity at strong phase electrode
Face poor air permeability.
Specifically, when the charge level poor air permeability of strong phase surrounding them, reduce the charge level of strong phase surrounding them highly, reduce
Strong charge level difference in height between phase electrode and weak phase electrode, while carrying out smashing stove treatment to the charge level of strong phase surrounding them, is used to
Increase the gas permeability of strengthening phase surrounding them charge level.
Specifically, when the charge level poor air permeability of weak phase surrounding them, reduce the charge level of weak phase surrounding them highly, increase
Strong charge level difference in height between phase electrode and weak phase electrode, while carrying out smashing stove treatment to the charge level of weak phase surrounding them, is used to
Increase the gas permeability of weak phase surrounding them charge level.
Further, the charge level control method of described three-phase alternating current mineral hot furnace also includes：
Semi-coke ratio resistance in detection stove, when semi-coke ratio resistance is higher than preset value, then improves with carbon ratio example at the stove heart when feeding,
Reduce simultaneously at electrode periphery with carbon ratio example.
Further, the charge level control method of described three-phase alternating current mineral hot furnace also includes：
When arranging three-phase electrode in three-phase alternating current mineral hot furnace, the center of three-phase electrode is set to deviate three-phase alternating current ore deposit heat
50~the 200mm of geometric center position of stove, wherein geometric center of the position of strong phase electrode near three-phase alternating current mineral hot furnace
Position, the geometric center position of the position of weak phase electrode away from three-phase alternating current mineral hot furnace.
(3) beneficial effect
Above-mentioned technical proposal of the invention has the following advantages that：
The charge level control method of the three-phase alternating current mineral hot furnace that the present invention is provided, using the inclination material consistent with electrical characteristic
Face, namely improve charge level at strong phase electrode highly in charging, reduces charge level at weak phase electrode highly so that strong phase electrode
Charge level difference in height is formed between weak phase electrode, so as to promote electric current to go deep into furnace bottom, it is ensured that the rational bed of material and molten bath power point
Match somebody with somebody, strong, weak phase electrode is all developed towards the direction for being conducive to product to convert, reducing energy consumption makes three-phase electrode furnace bottom operating mode equal
Improved, enter stove power and increase substantially, effect of increasing production is obvious.And method of the present invention is used, electric furnace can be made
Towards electrode carbonization is conducive to, be conducive to consumption and self-baking balanced growth, so that electrode is easily manipulated.
The charge level control method of the three-phase alternating current mineral hot furnace that the present invention is provided, is not entering to the electric furnace that three-phase transformer is powered
In the case that the single-phase transformation of row is transformed with short net, it is possible to increase electric furnace enters stove power and electric furnace efficiency, improves electric furnace yield, reduces
Supplies consumption, reduces operative's intensity, improves high-temperature work environment.
Brief description of the drawings
Fig. 1 is the charge level arrangement schematic diagram of the charge level control method of embodiment of the present invention three-phase alternating current mineral hot furnace；
Fig. 2 is the three-phase electrode arrangement schematic diagram of the charge level control method of embodiment of the present invention three-phase alternating current mineral hot furnace.
In figure：1：Strong phase electrode；2：Weak phase electrode；3：Furnace bottom；4：Furnace wall；5：Arc region；6：The bed of material；7：Transformer；8：
Short net；9：Three-phase alternating current mineral hot furnace.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained on the premise of creative work is not made, belongs to the scope of protection of the invention.
A kind of charge level control method of three-phase alternating current mineral hot furnace is the embodiment of the invention provides, is as shown in Figure 1 using this
Invention methods described carries out the charge level arrangement schematic diagram of three-phase alternating current mineral hot furnace when charge level is controlled.
In the present invention, each of three electrodes is disposed with three-phase alternating current mineral hot furnace, working voltage in each of three electrodes defined in it
A maximum electrode of highest, active power of output is strong phase electrode, then other two electrodes are weak phase electrode.
The charge level control method of three-phase alternating current mineral hot furnace provided in an embodiment of the present invention, specifically includes following steps：
By tremie pipe and distributing device to persistently being fed in stove, make to form charge level highly between strong phase electrode and weak phase electrode
Charge level at difference, and strong phase electrode highly be higher than charge level at weak phase electrode highly.
During charging, whether the flame intensity checked at strong phase electrode is consistent with the flame intensity at weak phase electrode.
If flame intensity is consistent, the charge level difference in height between original strong phase electrode and weak phase electrode is kept during charging.
If the flame intensity at strong phase electrode is more than the flame intensity at weak phase electrode, adjusted during charging strong phase electrode with
Feeding quantity between weak phase electrode, increases the charge level difference in height between strong phase electrode and weak phase electrode, until flame intensity is consistent.
If the flame intensity at strong phase electrode is less than the flame intensity at weak phase electrode, adjusted during charging strong phase electrode with
Feeding quantity between weak phase electrode, reduces the charge level difference in height between strong phase electrode and weak phase electrode, until flame intensity is consistent.
Wherein, the charge level difference in height between strong phase electrode and weak phase electrode is preferably arranged to 200~400mm, in this charge level
During difference in height scope, three-phase alternating current mineral hot furnace can reach optimal working condition.
The present invention carries out charge level control in stove using the inclination charge level consistent with electrical characteristic, due to electric furnace electrical characteristic not
Symmetrically, impossible radical change is manipulated by, therefore needs ensureing the situation of certain symmetry in furnace operation technique
Under, change the characteristics of strong and weak phase is adapted to, namely overall charge level should not be pursued excessively unanimously in stove, it should suitably increase strengthening phase
Electrode charge level highly, improves strong phase running current, increases the power output of strong relatively strong phase, complies with strong and weak phase current difference.Adopt
Take the charge level of strong phase electrode highly carries out the charge level operation of three-phase alternating current mineral hot furnace higher than the mode of the charge level height of weak phase electrode
Control, ensure that the rational bed of material and molten bath power distribution, strong and weak phase electrode is all sent out towards being conducive to product to convert direction
Exhibition, is the best means of reducing energy consumption, and this charge level is with Electrode Operation technique by electric furnace trial operation, three-phase electrode furnace bottom operating mode
Improved, enter stove power and increase substantially, effect of increasing production is obvious, and after charge level and Electrode Operation process reform, electrode
Paste consumption begin to decline, electric furnace towards be conducive to electrode carbonization, be conducive to consumption with self-baking balanced growth so that electrode
It is easily manipulated.
Furthermore, it is understood that the charge level control method of three-phase alternating current mineral hot furnace of the present invention also includes：
Stockpile is set with weak phase surrounding them in strong phase electrode respectively, the material stack height in strong phase surrounding them is provided with
Higher than the material stack height for being arranged on weak phase surrounding them.
Judge whether strong phase surrounding them occurs thorn fire by checking furnace flame situation.
If strong phase surrounding them occurs thorn fire, the material stack height of strengthening phase surrounding them is increased during charging, while increase is strong
Charge level difference in height between phase electrode and weak phase electrode, until thorn fire is eliminated.
Specifically, the material stack height of strong phase surrounding them is arranged on for 280~320mm, is arranged on weak phase surrounding them
Material stack height is 180~220mm, and this model is used with the material stack height of weak phase surrounding them in the material stack height of strong phase surrounding them
When enclosing, the generation of thorn fire can be to greatest extent reduced and eliminated.
Furthermore, it is understood that the charge level control method of three-phase alternating current mineral hot furnace of the present invention also includes：
By checking the flame intensity or current value or magnitude of voltage of strong phase electrode and weak phase electrode, judge strong phase electrode with it is weak
The charge level gas permeability of phase surrounding them.
If the current value of strong phase electrode is more than pre-set current value, or the magnitude of voltage of strong phase electrode is less than preset voltage value, or
Flame intensity at strong phase electrode then judges the charge level gas permeability of strong phase surrounding them less than the flame intensity at weak phase electrode
Difference.At this time, it may be necessary to reduce the charge level of strong phase surrounding them highly, the charge level between the strong phase electrode of reduction and weak phase electrode is highly
Difference, while carrying out smashing stove treatment to the charge level of strong phase surrounding them, is used to increase the gas permeability of strengthening phase surrounding them charge level.
If the flame intensity at weak phase electrode judges the material of weak phase surrounding them less than the flame intensity at strong phase electrode
Face poor air permeability.At this time, it may be necessary to reduce the charge level of weak phase surrounding them highly, increase the material between strengthening phase electrode and weak phase electrode
Face difference in height, while carrying out smashing stove treatment to the charge level of weak phase surrounding them, is used to increase the ventilative of weak phase surrounding them charge level
Property.
Furthermore, it is understood that when Thermal, physical dimension change, influence electric furnace is done manual work when distributing, and can be passed through
Adjustment center of electric furnace, with carbon ratio, adjusts the power distribution of the electric furnace bed of material and molten bath, it is ensured that electric furnace is most with electric furnace periphery furnace charge
Excellent operating condition.For example, semi-coke ratio resistance in detection stove, when semi-coke ratio resistance is higher than preset value 10%, if the current working of a furnace
It is the preferable working of a furnace, then after semi-coke ratio resistance is improved, charge level resistance will be caused to increase, heating power declines, and influences furnace condition anterograde, this
When then need to improve at the stove heart with carbon ratio example 5~10%, maintain stove heart heating power to be basically unchanged with material speed, while accordingly
Reduce electrode periphery and match somebody with somebody carbon ratio example 5~10%, maintain overall proportioning constant, it is ensured that product code numbering stabilization so that electric furnace operation electricity
Stream, voltage, enter stove power swing amplitude minimum, it is ensured that electric furnace operates in optimum operating condition.
Additionally, in order to ensure carrying out the safety when charge level of three-phase alternating current mineral hot furnace is controlled by the method for the invention
Property, during the newly-built or overhaul electric furnace powered for three-phase transformer, when arranging three-phase electrode in three-phase alternating current mineral hot furnace, make
50~the 200mm of geometric center position of three-phase alternating current mineral hot furnace is deviateed in the center of three-phase electrode, as described in Figure 2, wherein by force
The position of phase electrode is near the geometric center position of three-phase alternating current mineral hot furnace, and the position of weak phase electrode is intersecting away from three
The geometric center position of mineral hot furnace is flowed, so that the geometric center of three-phase alternating current mineral hot furnace is more consistent with electrical centre.
When three-phase alternating current mineral hot furnace works, the operating voltage of the operating voltage far above weak phase electrode of strong phase electrode has
When even be higher by more than 30%.When highly stove is controlled according to same charge level, weak phase electrode is low due to voltage, and electrode crucible is small, weak phase
The charge level thickness of electrode is far above the charge level thickness degree of strong phase surrounding them, therefore charge level poor air permeability, and furnace gas is changed with furnace charge
Calorific intensity is low, and most of furnace gas is concentrated and escaped near strong phase electrode.Using the method for the invention, the material of strong phase electrode is improved
After face height, the charge level height of the weak phase surrounding them of reduction, it is possible to increase the furnace gas flux near weak phase electrode, improve furnace gas
Heating heat energy accounting, reduces the charge level heating electric energy ratio of weak phase electrode, improves furnace bottom arc power ratio, reaches raising electric furnace
The purpose of efficiency.
The charge level for carrying out three-phase alternating current mineral hot furnace using the present invention is controlled, and has broken original to Three-Phase Transformer voltage, electricity
The balance control technique of stream, improves the working voltage and running current of strong phase electrode.Compared with original balance control stove, Qiang Xiang
The operating current upper limit for being operated in transformer permission that electrode can be stablized, without excessively yielding to weak phase voltage current data,
Reduce electric furnace short net loss.Realize in the case where weak phase electrode current is rationally reduced, improve the operation of weak phase electrode
Voltage, the operation that improve weak phase electrode is active.It is bottom temperature because the voltage of weak phase electrode improves limiting factor, therefore only
Ensure the bottom temperature of weak phase electrode, be in rational adjustable range.
In sum, the charge level control method of the three-phase alternating current mineral hot furnace that the present invention is provided, is not supplying three-phase transformer
In the case that the electric furnace of electricity carries out single-phase transformation with short net transformation, electric furnace can be effectively improved and enter stove power and electric furnace efficiency, carried
Electric furnace yield high, reduces supplies consumption, reduces operative's intensity, improves high-temperature work environment.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
Modified with to the technical scheme described in foregoing embodiments, or equivalent is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (9)
1. a kind of charge level control method of three-phase alternating current mineral hot furnace, it is characterised in that specifically include following steps：
By tremie pipe and distributing device to persistently being fed in stove, make to form charge level difference in height between strong phase electrode and weak phase electrode,
And the charge level at strong phase electrode highly be higher than charge level at weak phase electrode highly；
During charging, whether the flame intensity checked at strong phase electrode is consistent with the flame intensity at weak phase electrode；
If flame intensity is consistent, the charge level difference in height between original strong phase electrode and weak phase electrode is kept during charging；
If the flame intensity at strong phase electrode adjusts strong phase electrode and weak phase more than the flame intensity at weak phase electrode during charging
Feeding quantity between electrode, increases the charge level difference in height between strong phase electrode and weak phase electrode, until flame intensity is consistent；
If the flame intensity at strong phase electrode adjusts strong phase electrode and weak phase less than the flame intensity at weak phase electrode during charging
Feeding quantity between electrode, reduces the charge level difference in height between strong phase electrode and weak phase electrode, until flame intensity is consistent.
2. the charge level control method of three-phase alternating current mineral hot furnace according to claim 1, it is characterised in that strong phase electrode with it is weak
Charge level difference in height between phase electrode is 200~400mm.
3. the charge level control method of three-phase alternating current mineral hot furnace according to claim 1, it is characterised in that also include：
Stockpile is set in strong phase electrode and weak phase surrounding them respectively, be provided be higher than in the material stack height of strong phase surrounding them
It is arranged on the material stack height of weak phase surrounding them；
Judge whether strong phase surrounding them occurs thorn fire by checking furnace flame situation；
If strong phase surrounding them occurs thorn fire, the material stack height of strengthening phase surrounding them is increased during charging, while the strong mutually electricity of increase
Charge level difference in height between pole and weak phase electrode.
4. the charge level control method of three-phase alternating current mineral hot furnace according to claim 3, it is characterised in that be arranged on strong mutually electricity
Material stack height around pole is 280~320mm, and the material stack height for being arranged on weak phase surrounding them is 180~220mm.
5. the charge level control method of three-phase alternating current mineral hot furnace according to claim 1, it is characterised in that also include：
By checking flame intensity, current value or the magnitude of voltage of strong phase electrode and weak phase electrode, judge strong phase electrode with weak phase electricity
Charge level gas permeability around pole；
If the current value of strong phase electrode is more than pre-set current value, or the magnitude of voltage of strong phase electrode is less than preset voltage value, or strong phase
Flame intensity at electrode then judges the charge level poor air permeability of strong phase surrounding them less than the flame intensity at weak phase electrode；
If the flame intensity at weak phase electrode judges that the charge level of weak phase surrounding them is saturating less than the flame intensity at strong phase electrode
Gas is poor.
6. the charge level control method of three-phase alternating current mineral hot furnace according to claim 5, it is characterised in that when strong phase electrode week
During the charge level poor air permeability enclosed, the charge level of strong phase surrounding them is reduced highly, reduce the material between strong phase electrode and weak phase electrode
Face difference in height, while carrying out smashing stove treatment to the charge level of strong phase surrounding them, increases the gas permeability of strengthening phase surrounding them charge level.
7. the charge level control method of three-phase alternating current mineral hot furnace according to claim 5, it is characterised in that when weak phase electrode week
During the charge level poor air permeability enclosed, the charge level of weak phase surrounding them is reduced highly, increase the material between strengthening phase electrode and weak phase electrode
Face difference in height, while carrying out smashing stove treatment to the charge level of weak phase surrounding them, increases the gas permeability of weak phase surrounding them charge level.
8. the charge level control method of three-phase alternating current mineral hot furnace according to claim 1, it is characterised in that also include：
Semi-coke ratio resistance in detection stove, improves when semi-coke ratio resistance is higher than preset value, then when feeding and matches somebody with somebody carbon ratio example at the stove heart, together
When reduce electrode periphery place with carbon ratio.
9. the charge level control method of three-phase alternating current mineral hot furnace according to claim 1, it is characterised in that also include：
When arranging three-phase electrode in three-phase alternating current mineral hot furnace, the center of three-phase electrode is set to deviate three-phase alternating current mineral hot furnace
50~200mm of geometric center position, wherein the position of strong phase electrode is near the geometric center position of three-phase alternating current mineral hot furnace,
Geometric center position of the position of weak phase electrode away from three-phase alternating current mineral hot furnace.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004257703A (en) * | 2003-02-27 | 2004-09-16 | Takuma Co Ltd | Electric melting furnace controller |
| CN101487666A (en) * | 2009-01-06 | 2009-07-22 | 向方贵 | Biphase ore furnace and its smelting method |
| CN103604292A (en) * | 2013-11-20 | 2014-02-26 | 勾武 | Three-phase alternating-current ore smelting furnace and method for controlling furnace condition thereof |
-
2016
- 2016-12-14 CN CN201611154307.2A patent/CN106766972B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004257703A (en) * | 2003-02-27 | 2004-09-16 | Takuma Co Ltd | Electric melting furnace controller |
| CN101487666A (en) * | 2009-01-06 | 2009-07-22 | 向方贵 | Biphase ore furnace and its smelting method |
| CN103604292A (en) * | 2013-11-20 | 2014-02-26 | 勾武 | Three-phase alternating-current ore smelting furnace and method for controlling furnace condition thereof |
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