OPERATION METHOD OF ELECTRIC FURNACE

Hereinafter, detailed example of the present invention embodiment to less than 1000. However the present invention refers to hereinafter in the disclosure limited to various different example embodiment which is embodied in the form of percussion, only the embodiment of the present invention disclosure is completely examples and can be utilized, to categories of the invention completely for alerting the person with skill in the art being ball number are disclosed.

Figure 1 shows a according to the example of the present invention embodiment to determine the electric furnace showing also are disclosed.

The reference also 1, according to the example of the present invention embodiment electric furnace, internal raw material, for example scrap receiving lateral movement (110a) on, lateral movement (110a) upper with a cover (110b) and include, lateral movement (110a) on cover (110b) is lower electrode are opposed (120a) an upper electrode (120b) can be each provided with. Upper electrode (120b) of the lower electrode (120a) upper electrode power is applied (120b) of the lower electrode (120a) and arcs can arise between, arc string by lateral movement (110a) hole as raw material, e.g. scrap to dissolve number can be steel high pressure liquid coolant. The lateral movement (110a) provided at the lower lateral movement (110a) to a rocker support unit (200) can be with.

Lateral movement (110a) one side of slag outlet (116) can be formed, lateral movement (110a) formed at one side of tap hole for tapping molten steel (114) can be formed. Slag outlet (116) a door (118) is provided in a slag outlet (116) can be regulating the opening of. The tap hole (114) is openable and closable in a ladle and number when the number of molten steel bath closed open lateral movement is complete the multivalent oxide (110a) can be passed. Slag outlet (116) provided at the lower slag outlet (116) for receiving discharged through a slag port (not shown) can be provided with slag, tap hole (114) having (not shown) for receiving the lower portion of steel ladle movable can be.

In addition, slag outlet (116) is lateral movement (110a) into number 1 for oxygen supply for supplying oxygen lance (134) on, gun [ming re-, i.e. carbon number 2 dosing lance (132) can be with.

In addition, lateral movement (110a) provided at the lower lateral movement (110a) for gas to be supplied to stirring for agitating molten steel into low-odor nozzle (150) can be with, nozzle-odor (150) storing the stirring gas reservoir (152) can be connected. The, nozzle-odor (150) when tank relatively temperature is low thus number of tap hole (114) the perimeter, to form the slit of a raw material can be. The nozzle-odor (150) therefore form as follows.

Number molten steel for numerical control machine the upper electrode (120b) of the lower electrode (120a) application of a voltage, upper electrode (120b) and arcs can arise from, upper electrode (120b) and the lower electrode (120a) so as to surround the magnetic field formed therein. Capacitor is formed by a magnetic field (120b) to change the direction of the flange factor in the other. In particular, upper electrode (120b) and arranged substantially vertical, upper electrode (120b) and arranged close to the bottom electrode (120a) for applying voltages to the electrodes (not shown) by lower electrode line generates a magnetic field of the partially subjected. For this reason lateral movement (110a) inside the hot zone (hot spot) is operated with a relatively high and, low-temperature region (cold spot) are formed as relatively temperature is low, one of raw material such as low-temperature region into which portion, molten steel discharge hole for tapping molten steel (114) portion are disclosed. In particular, lateral movement (110a) an upper electrode (120b) symmetrically with reference to the central part with the upper, tap hole (114) is formed lateral movement (110a) and another side protruded arc heat because of tap hole (114) is not passed as part number to the tap hole (114) low-temperature region is equal to form filler such as temperature is low. The nozzle-odor to a low-temperature region (150) of the anode stirs molten steel with lateral movement (110a) to maintain a certain temperature the internal molten steel temperature in the can.

The cover (110b) number when lateral movement is molten steel bath (110a) outflow of exhaust gas or temperature of inside of the feed can be billion number. The, cover (110b) is a molten steel bath in a process number by which the number and closes the billion for cooling jacket (112) and, number steel pipe for the flue gas generated in a process bath (140) can be with.

The description of the configuration of the electric furnace dispensed the on-sensors other publicly known techniques.

According to the method of the present invention embodiment hereinafter example electric furnace by the barrier metals other.

Figure 2 shows a method according to a method of the present invention embodiment also electric furnace steel bath to sequentially number example showing order , Figure 3 showing the state in which the tapping the molten steel during waiting for processing are disclosed.

The reference 2 also, according to the method of the present invention embodiment example electric furnace, meter lateral movement (110a) into the process (S101) and a raw material, the raw material supplying molten steel bath (S103) and number, part of molten steel (S105) that determines whether the process result and determining whether or not the part of molten steel, part of molten steel is time-delayed and do not part of molten steel is repeated when the lateral movement (110a) that finding work process (S120) with stirring into a rocker comprising waiting for tapping molten steel can be.

First, lateral movement (110a) is charged into a raw material extracting method, upper electrode (120b) and the lower electrode (120a) is removed by dissolving scrap steel can be high pressure liquid coolant to a number. , the difference can be performed over 2 tea or 3 with charge material dissolved.

For example lateral movement (110a) raw material charged into a 1 difference, difference dissolved after 1 resource, without tapping the lateral movement (110a) 2 raw material charged into a difference, procedure 2 difference can be dissolved. The, material may also be used but further performs charging and 3 3 difference difference dissolution process, the procedure is lateral movement (110a) and repair after not more frequently used when carrying out a dormant long movable.

A molten steel bath in a process number low-odor nozzle (150) by stirring the molten steel through stirring gas is blown can be disclosed. The, number 1 from dissolved gas in a molten steel bath 2 difference difference middle lateral movement until dissolved (110a) is not stirring gas for comtrol eddy formed extended even when very low since the high agitation efficiency of molten low-odor nozzle (150) flow rate of through hole is not, e.g. such that the flow of 30NL/minutes can fetch disclosed. 2 Difference since stirring gas for blowing molten steel and formed extended middle dissolved and vice versa, for example such that the flow of molten steel while stirred 60NL/minutes increasing number can be fixing element steel high pressure liquid coolant. The, stirring gas argon (Ar) and nitrogen (N₂ ) Having either can be used. The, stirring gases are argon used good, when nitrogen can be replaced with argon supply failure occurs.

Herewith lateral movement (110a) a tap hole (114) to move downward sloping side to a direction the molten raw material via an inlet end of relatively temperature is low and high pressure liquid coolant input raw steel can be gasifier number 30. The lateral movement (110a) extrudes molten steel lateral movement by a rocker (110a) to clear the raw materials can be dissolved to and gasifier is promoted. The, lateral movement (110a) is in the range of 3 to 4° moves rocker, barrel angle range if it did and number less than cosmetic raw material or gasifier code to tame. In addition, barrel angle number is greater than the range lateral movement (110a) is be hand risk disclosed. I.e., lateral movement (110a) is formed by a lower refractory material embedded in and received molten steel but, since the lateral movement is free refractory thin upper refractory (110a) is greater than molten steel lateral movement of rocker angle (110a) roh body part to move the upper side of the hand is bigger disclosed.

In addition, molten steel bath in a process number number 1 lance (134) number 2 on lance (132) through carbon with oxygen can fetch disclosed. Oxygen and carbon slag foaming can be activate. The, 1 2 dissolved dissolved oxygen and carbon for blowing amount difference when compared difference further increases capable of.

On the other hand, when the number molten steel bath, subsequent operation to adjust a temperature required for regular height from embodiment can. The, heat transfer efficiency due to the slag forming step since dissolved upper electrode as compared 2 difference (120b) and the lower electrode (120a) lowering a voltage applied to power efficiency can be height. Even lateral movement process (110a) in a low-odor out end of nozzle (150) through stirring gas can be blown. The, lateral movement (110a) 2 is dissolved as compared barrel angle difference can increase, stirring gas for comtrol capable of increased. For example dissolved 2 difference in lateral movement (110a) of rocker 4° angle when, during lateral movement (110a) 4 a. The barrel and can be 5°, stirring gas flow rate 80NL/min. can fetch disclosed.

In addition, a regular height from measuring temperature and oxygen embodiment of molten steel, such as temperature and oxygen amount of molten steel target becomes a rectangle shape, a regular height from completing the , otherwise the method such as the regular height from said can further embodiment.

on completion of the process, according to the result of determining whether or not the tapping-off of tap hole (114) may be molten steel through the tapping, tapping the delay step or if tapping molten steel without lateral movement (110a) can be housed in a waiting state.

Lateral movement (110a) (S120) part of molten steel prepared by the number in waiting process can be is carried out as follows.

When the temperature of molten steel tapping occurs at step and re-price module is disclosed. The lateral movement is in this case steel (110a) in which it accomplishing steering angle sensor. However waiting for tapping even during lateral movement (110a) in molten steel temperature in the price path structure is inevitable disclosed. Lateral movement (110a) and the wait time in the temperature of the molten steel price increases size also can be increased. The temperature of the molten steel for example 0. 7 To 1. 5 °C/minutes at a rate of price to the TFTs. The numerical long S. adhered to the accumulated data. But, close adhesion part is molten steel (110a) by solidification of the slag in quickly but not suitable, lateral movement (110a) and either a layer of air hitting a heavy load from solidification of the lower furnace refractory portion formed now, if severe for tapping molten steel (114) comprises as an outer pipe has sprung up.

The part of molten steel when delay, without tapping of molten steel in roh body accommodated in the molten steel in temperature is higher, when a measured temperature before molten steel is solidified to 1540 °C degree temperature, an upper electrode arc producing waste heat or power supply, butane etc. using molten steel temperature increasing embodiment. However increasing low-temperature region becomes hard to reach from steel tubes in uniformly heating again, in particular of heating on the basis of the arc string do not dissolve easily been number point at the door.

In the present invention the lateral movement (110a) without tapping molten steel prepared by the number while waiting in formation of molten and solidified and now number billion, immediately subjected to a process step in a method for adjusting temperature of molten steel to number etched.

On completion of the number of molten oxide, about 1620 °C degree of temperature of the molten steel. Tapping molten steel tapping various aberrations due to some unexpected delays without lateral movement (110a) held within waiting state when lateral movement (110a) interior exhaust (140) outside air is drawn through the lateral movement (110a) is introduced therein such that the temperature of the molten steel that the price, in proportion to the temperature of the molten steel is equal to Bidder by increased waiting time. For example lateral movement (110a) about 60 minutes the temperature of the molten steel received eddy-waiting state per minute 0. 7 To 1. 5 °C price by block 1540 °C is under or over the front. The, molten steel is used to start a resolution 1540 °C solidification, coagulation layer from wall temperature is low and relatively low-temperature region to be coated. During waiting for tapping the molten steel temperature lowering and coagulation billion number as shown in fig. 3 for lateral movement (110a) odor after end of a nozzle (150) holds the molten steel through stirring gas is blown, it is power and oxygen/carbon supply increasing temperature of molten steel can be performing.

Table 1 below show one example etc. during waiting for tapping the molten steel processing.

First, determine whether number atmosphere after tapping molten steel tapping high pressure liquid coolant stream, lateral movement (110a) and a barrel (S121) odor nozzle (150) through stirring gas lateral movement (110a) (S122) stirring molten steel sections are inside the base. The, stirring gas odor nozzle (150) and the flow rate of fluid is blown through 30NL/minutes, lateral movement (110a) is a low temperature range of tap hole (114) side 3 to extent 5° can slant disclosed. This is a low-temperature region of tap hole (114) of molten steel in the vicinity of the low-temperature region side get out of bed temperature is relatively low-temperature region is moved by the molten steel is solidified to be added when in a billion number are disclosed.

Waiting for a predetermined time or during tapping of molten steel can (S123) measuring current temperature every predetermined time.

(S124) comparing measured current temperature and predetermined temperature and its volume and its volume, its volume and its volume measured current temperature is a predetermined temperature comparison result, e.g. 1540 °C molten steel temperature is reached increasing embodiment can (S125).

Or, waiting for measuring latency during tapping of molten steel, price per unit time measured latency and velocity changes of molten temperature of molten steel by computing a current temperature of molten steel can be predicted. The predicted current temperature and its volume and its volume compares a predetermined temperature, a predetermined temperature and its volume and its volume the current temperature is compared result, e.g. 1540 °C molten steel temperature is reached increasing embodiment can.

Close adhesion part is increasing (110a) to a low-odor out end of nozzle (150) before being blown through the stirring the MFC and 50 to increased 70NL/minutes, upper electrode (120b) of the lower electrode (120a) to a power supply while temperature of molten steel can be an arc is generated. Herewith number 1 lance (134) number 2 on lance (132) through a slag by supplying oxygen and carbon can be formed. The method embodiment is the increasing, thereby elevating the temperature of molten steel to the lower furnace now billion number can be formed shaft.

Increasing the temperature of molten steel is faster 1620 °C bringing about 100 °C degree height can be usable in degree. Thus increasing current temperature and upper electrode (120b) and the lower electrode (120a) depending on an amount of power supplied to such as but, about 30 minutes to a temperature bringing molten steel tapping can be performed.

Table 1 said reference surface, and increasing the flow rate of oxygen incorporation 3000Nm 3/degree when initially, followed by activated carbon at a rate of 80 kg/minutes slag layer covering the lower electrode (120b) of the lower electrode (120a) 650V voltage, current 100Ka condition can be powered. When 7000Nm 3/after oxygen, carbon can up-regulate the embodiment increasing to 100 kg/minutes.

Upper electrode (120b) and the lower electrode (120a) amount of power that is supplied to thus amount, non-heating, temperature amount, depending on heat transfer efficiency and the like can be, depending on the amount of time performing power increasing s402.

The increasing of molten steel is complete, upper electrode (120b) and the lower electrode (120a) and the power supplied to the, oxygen and carbon for blowing is stopped, lateral movement (110a) is supplied into the stirring gas 30NL/minutes agitating molten steel tapping waiting for other.

Then, tapping (S126) to determine whether the tapping molten steel stream of tap hole (114) molten steel through tapping each other. Measuring temperature of molten steel is once again before tapping, tapping temperature of molten steel to a temperature, for example when 1620 °C hereinafter, after increasing to a temperature capable of tapping molten steel to further embodiment of tap hole (114) can be tapping through.

Waiting without tapping molten steel and is repeated when the lateral movement (110a) end of a continual out while agitating the aforementioned process, i.e. measuring or predicting a current temperature of molten steel, performing repeated increasing ambient humidity to each other.

The method part of molten steel into the waiting, lateral movement (110a) can number in the molten steel is solidified billion, the solidification of molten composition is an increasing step of heating to dissolve process time can be prevented. In addition, subsequent to adjust the temperature of the molten steel is connected with a power source by the tapping operation is can be connection can be smoothly.

On the other hand, according to said embodiment of the present invention idea is to specifically described but for example, a chamber in which said embodiment examples and description, its number one for accomplishing one is not known. In addition, the feature of the present invention one skilled in the art to understand the various embodiment of the present invention may be within the range of possible examples are disclosed.