JPH037727B2 - - Google Patents

Description

Detailed Description of the Invention The present invention provides a heating furnace between the continuous casting process and the rolling process, which absorbs the difference in processing capacity between the two processes, and also eliminates the problem of charging or extraction waiting due to troubles occurring in both processes. The present invention relates to a method for transporting materials to be heated in a continuous heating furnace that minimizes the influence.

There is a big difference in processing speed between continuous casting equipment and rolling equipment. Therefore, the heating furnace placed between the two processes is required to act as a buffer zone to absorb the difference in processing capacity as much as possible.

That is, it is desirable to be able to continuously charge the heat-receiving material sent from the continuous casting equipment into the furnace without dissipating the heat it possesses while extracting the heat-receiving material to the rolling line. About this measure
No. 27761 discloses a three-part hearth heating furnace. Although this three-part hearth heating seems to have the intended advantages, it has the following problems in actual operation. A specific example will be described with reference to FIG. 6. (a) Charge 1 arrives in front of the furnace, WB 1 is independently driven in accordance with the charging pitch, and charges and conveys it into the furnace.

(b) Charge 1 is transported to the center of the furnace by the synchronous interlocking drive of WB1 and WB2. After the charge 1 is transferred to the space 2, the WB 1 is independently driven in accordance with the charging pitch, and the charge 2 is charged and conveyed into the furnace. At the same time, charge 1 is WB2, WB
3, it is transported to the furnace extraction side in line with the extraction pitch, and transferred to space 3.

(c) Charge 2 is transported to the center of the furnace by the synchronous interlocking drive of WB1 and WB2. After the charge 2 is transferred to the space 2, the WB 1 is driven independently in accordance with the charging pitch, and the charge 3 is charged and transported into the furnace. At the same time, charge 1 and charge 2 are driven in synchronization with WB2 and WB3, and charge 1 in space 3 is transported to the extraction pitch and is extracted to the outside of the furnace, that is, to the rolling line, and charge 2 in space 2 is transferred to the extraction side of the furnace. Transfer to space 3 where it will be transported.

(d) Perform the same movement as in (c) above, charge 2 is extracted to the outside of the furnace, and charge 4 is placed in space 1.
However, charge 3 is located in space 3.

(e) There was a short-term trouble with the rolling equipment, and the product was placed in a waiting state for extraction. Since Space 2 is an empty space, it is not affected by the above trouble and can be used with WB1.
The WB2 is synchronously driven and the charge 4 is transported to the center of the furnace. Charge 4 who has transferred to Space 2 and Charge 3 who is in Space 3,
The material waits at that location until the problem is resolved, and when it is ready to be rolled, it is transported into the furnace and extracted. Since the WB 1 can be driven independently, the charge 5 is charged and transported into the furnace according to the charging pitch without being affected by any trouble.

(f) There was a problem with the rolling equipment that lasted for a long time, and we were in a state where we were waiting for one charge to be extracted. First with WB1
The WB2 is synchronously and continuously driven, and the charge 5 in the space 1 is transported to the center of the furnace. After Charge 5 transfers to Space 2, Charge 6
They are charged and transported into the furnace by the independent drive of WB1, but charge 5 and charge 4 wait in space 2 and space 3. Therefore, at this point, there are three charges in the furnace.

(g) The trouble with the rolling equipment was resolved and extraction became possible. Charge 5 in space 2 and charge 4 in space 3 are transported and extracted within the furnace by synchronous continuous driving of WB2 and WB3. However, the charge 6 in space 1 cannot be transported into the furnace and has to wait in space 1. If this were the case, even if WB1 were to be driven synchronously with WB2 and WB3 and transported into the furnace, it would have to be aligned with the extraction pitch and there would be a difference with the charging pitch. This will result in inappropriate charging arrangement, which will have a negative impact on subsequent operations. Therefore, in this case, one charge cannot be charged.

(H) Since it is not possible to load one charge, space 2 becomes an empty space and the same movement as in (c) can be made.

(li) A problem occurred with the continuous casting equipment and the product was placed in a state of waiting for charging. In this case as well, basically the same movement as in (c) is carried out; charge 6, which is unaffected by the trouble and is in space 3, is extracted, charge 7, which has been conveyed to space 2, is conveyed to the furnace extraction side, and charge 8 is charged into the furnace after troubleshooting.
transported.

As described above in detail, the problem lies in the condition (g), that is, the inability to charge in one charge.

The purpose of the present invention is to solve this problem, and a continuous heating furnace with a three-part hearth is installed between the continuous casting process and the rolling process. The vertical drive devices are independent, and the forward and backward drive devices are independent for one hearth, and the other two hearths are connected to each other by a coupler to form a common drive device. In the present invention, by disposing a matching charger in front of the charging side of the heating furnace having such a configuration, the difference in throughput between the continuous casting and rolling processes is achieved. In addition to absorbing problems, it is possible to minimize the negative effects of troubles that occur in each process. Furthermore, it eliminates the need for hot pieces sent from the casting process to wait outside the furnace, eliminates the situation where there are gaps in the furnace, increases the hearth occupancy rate of the heated material, and improves not only the fuel consumption rate but also the degree of operational freedom. The purpose is to

An embodiment of the present invention will be described below.

2a, 2b and 3 illustrate the present invention, in which a heating furnace 1 is placed between a continuous casting process and a rolling process as a buffer zone to absorb the difference in performance between them. 12 in FIG. 3 is a matching charger;
is rack 13, pinion 13 ₁ , and ram 1
4, a hydraulic cylinder 15, a drive lever 16, and a guide roller 17. The material 19 that has been sent to the front of the heating furnace 11 by the charging roller table 18 is unloaded within the heating furnace 11 and placed on a fixed skid 20, and the material 19 is sequentially advanced inside the furnace by the movable skid 21 inside the furnace. .

In the heating furnace of the present invention, each time the heated material 19 is charged, it is operated with a stroke SMC calculated by the formula SMC = Ss + Swb (N-n) + ΔSwb, and the matched material 19 is charged into the heating furnace 11. charger 1
2 is provided in front of the material charging side of the heating furnace, and its basic heating will be explained with reference to FIGS. 2a and 2b.

A The material to be heated A is extracted from the inside of the furnace onto the extraction table 22.

B Δt ₁ hour (difference between extraction pitch and charging pitch)
Later, the material to be heated is sent to the front of the furnace.

C. Grasp the position of the last material C charged into the furnace and adjust the stroke of the charger 12.
SMC is calculated by the formula Ss+Swb(N-n)+ΔSwb.

D Charger 12 with calculated stroke amount
Activate and charge material RO into the furnace at position RO ₁ .

E Material # ₁ is transported into the furnace along with other materials to be heated to the extraction pitch.

The details of the heating furnace in the present invention will be explained in detail with reference to FIG.

In FIG. 4, the heated material 19 is indicated by I to I, the charging port is indicated by 32, and the extraction port is indicated by 33.

After ₂ hours, the heated material is extracted from the extraction port 33,
The materials to be heated in the furnace are transferred from the stroke loading side of the walking beam to the extraction side. Now the heated material A has moved to the position B, and the position A is now open. t After ₁ hour, the material to be heated is sent to the front of the furnace.
It is loaded into the open position A.

Next, after 2×t ₂ hours, the heated material is extracted, and Q moves to position B. Furthermore, after 3×t ₂ hours, E is extracted and Ji moves to the position of C, and at this point, the positions of A and B are aligned. The material to be heated that is sent in this state is charged into position B by increasing the stroke of the charger so as not to cause any gaps in the furnace. 5×t After ₂ hours, Ha will be extracted and Li will be in the position of D. At this time, the nuts sent to the front of the furnace are charged to position C by a charger.

That is, the present invention calculates the charge stroke amount from the distribution of the heated material in the furnace for each heated material to be charged, and eliminates the missing state of the heated material in the furnace.
This stroke amount is expressed by the following formula.

SMC=Ss+(N-n)Swb+ΔSwb Where, SMC: Charging stroke of the nth charge Ss: Standard stroke Swb: Walking beam stroke ΔSwb: Walking beam stroke error N: The nth charge already in the furnace For example, in Figure 4, the stroke amount for n = 3rd stroke is 5, and the number N extracted is 5, and S _{i = 3} = Ss + (5-3) Swb + ΔSwb = Ss + 2Swb + ΔSwb. Become.

Next, if a trouble occurs in the continuous casting equipment or the rolling equipment while both the continuous casting equipment and the rolling equipment are in operation, the product is placed on a waiting list for charging or extraction. In this case, it is most desirable to have equipment that allows continuous extraction or charging without causing any trouble.
If such troubles are anticipated and the heating furnace is made to wait for its buffer function, it will naturally be operated with an empty space inside the furnace.

Here, a specific example of operation using the split hearth of the present invention will be explained with reference to FIGS. 1 and 5.

(b) Charge 1 reaches the front of the furnace, WB1 and WB2 are driven in accordance with the charging pitch, and the charge is charged into the furnace.
transported.

(b) WB after Charge 1 transfers to Space 2
1, WB2 and WB3 are synchronously driven in accordance with the charging pitch, charge 2 is charged into the furnace, and charge 1 is transported to the extraction side and placed in space 3.
Transfer to.

(c) WB1, WB2, and WB3 are synchronously driven in accordance with the extraction pitch, and charge 3 is charged into the furnace at a charging pitch different from the extraction pitch. The charge 3 is charged and conveyed into the furnace by taking advantage of the characteristics of the matching charger 12 described above. Charge 1
When the extraction to the rolling line is completed, there is an extraction waiting time due to the difference in charging and extraction pitch. Utilizing this time, the charge 2 located in space 2 is transported to the furnace extraction side and transferred to space 3. In other words, with WB1 in the lowered state,
WB1, WB2 and WB3 are driven in synchronization.
On the other hand, charge 3 is matching charge 12.
Since WB1 is in a lowered state, it is loaded into a predetermined position without being affected by the movement of WB.

(d) Perform the same movement as above (c) and charge 2
is extracted to the outside of the furnace, and charge 4 is located in space 1 and charge 3 is located in space 3.

(e) There was a short-term trouble with the rolling equipment, and the product was placed in a waiting state for extraction. Charge 3 in space 3 waits in that position until WB 3 stops and the trouble is resolved. Charge 4 in space 1
The charge 5 is charged and transported into the furnace by WB1, WB2 and the matching charger 12 without being affected by the above trouble. and charge 3
As soon as the extraction is completed, WB1, WB2 and WB3 are driven synchronously and interlocked to move Charge 4 to Space 3 while WB1 remains in the lowered state.

(f) There was a problem with the rolling equipment that lasted for a long time, and we were in a state where we were waiting for one charge to be extracted. Charge 4 remains in the furnace waiting in space 3. Charge 5 and space 6 in space 1 are WB
1. Charged by WB 2 and matching charger 12 and transported into the furnace. However, charge 5 is in space 2 because charge 4 is in space 3.
It will be located in Therefore, at this point, there are three charges in the furnace.

(g) The trouble with the rolling equipment was resolved and extraction became possible. WB1, WB2, and WB3 are synchronously driven in accordance with the extraction pitch, and the charge 7 is charged by the matching charger 12 without waiting outside the furnace. In other words, the characteristics of the matching charger 12, which absorbs the difference in charging and extraction pitches regardless of the movement of the WB, can be greatly utilized. Therefore, even if there is a waiting time for extraction of one charge in (f), charge 7 is loaded, and charge 6 and charge 5 are located in space 2 and space 3, respectively.

(H) Continuous extraction of charge 5 in the same manner as in (G) above,
Charge 8 is charged.

(li) A problem occurred with the continuous casting equipment and the product was placed in a state of waiting for charging. Charge 6 in space 3 is
It is extracted to the rolling line by a drive that matches the extraction pitch of WB3. Charge 7 in space 2
Charge 8 in space 1 waits at that position until charge 9 arrives, and upon arrival, it is charged, extracted, and transported into the furnace in the same manner as in (h).

In addition, in the present invention, the hearth disposed on the extraction side of the furnace is connected to a single drive device that moves up and down and back and forth, while the other two hearths are connected to each other with a coupler so that a common front and back The reason for connecting each of the two hearths to a separate vertical drive is to make the forward and backward synchronized operation of the complex three-part drive as easy as possible, and to simplify the equipment. The aim is to simplify it as much as possible.

In the present invention, since a matching charger is used for charging the material to be heated, the hearth WB1 on the charging side is
When the material to be heated is being charged and extracted, it can be interlocked with the hearth WB3 on the extraction side, and the two hearths WB2 and WB3 on the extraction side are interlocked and transported at a fast pitch, and the hearth WB1 The above configuration is possible because the hearth WB1 can be lowered when the heated material should not be transported.

Although described in detail above, the present invention has the following remarkable effects.

The influence of waiting for charging or extraction due to troubles occurring in the continuous casting process or rolling process can be almost eliminated by the method for conveying heated materials in a continuous heating furnace of the present invention. Therefore, the material to be heated that has been transported from the continuous casting process can be charged into the heating furnace without being cooled.

Conventionally, one charge (approximately 20 pieces) of high-temperature material transported from the continuous casting process, which could not be charged into the heating furnace due to problems in the rolling process, is treated as cold material. There was a problem with large heat loss. This problem can be solved to a minimum, resulting in significant energy savings.

The two hearths on the charging side are connected only in forward and backward movement, and a matching charger is installed, so the two hearths on the charging side can be operated in synchronized forward and backward movement without compromising the three-division function. can be facilitated. In addition, one forward/reverse drive cylinder can be omitted, and equipment costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of an embodiment of the present invention, Fig. 2a
The figure is a plan view, FIG. 2b is a side view, and FIG. 3 is a longitudinal sectional view showing a portion in detail. FIG. 4 is a time chart showing the timing of loading and unloading operations of the matching charger according to an embodiment of the present invention. Fifth
The figure is a time chart showing the timing of charging, conveyance within the furnace, and extraction in one embodiment of the present invention, and FIG. 6 is a time chart showing the timing of charging, conveyance within the furnace, and extraction in the conventional method. 11...Heating furnace, 12...Matching charger, 13...Rack, 13 ₁ ...Pinion, 14
... Ram, 15 ... Hydraulic cylinder, 16 ... Drive lever, 17 ... Guide roller, 18 ... Charging roller table, 19 ... Heated material group, 20 ... Fixed skid, 21 ... Movable skid, 22... Extraction roller table, WB1 to WB3... Hearth, 23
...WB1 walking beam frame, 24
...WB2 walking beam frame, 25
...WB3 walking beam frame, 26
... Vertical drive device of WB1, 27... Vertical drive device of WB2, 28... Vertical drive device of WB3, 29... Back and forth drive device common to WB1 and 2,
30...WB3 forward/backward drive device, 31...WB
Connector between 1 and WB2, 32...Charging port, 33...
Extraction port.

Claims (1)

[Claims] 1. In a method for transporting a heated material in a three-part continuous heating furnace with a hearth disposed between a continuous casting process and a rolling process, the hearth disposed on the extraction side of the furnace is moved vertically and It is connected to a single drive unit for forward and backward movement, while the other two
In front of the charging side of a heating furnace, two hearths are connected to each other by a coupler and connected to a common forward and backward movement drive device, and each of the two hearths is connected to a separate vertical movement drive device, A continuous heating furnace characterized in that a matching charger is provided, and the charger charges the material to be heated into the heating furnace by operating at a stroke SMC calculated by the following formula each time the material to be heated is charged. method of transporting heated materials. SMC=Ss+Swb(N-n)+ΔSwb However, Ss: Standard stroke of charger, Swb: Walking beam stroke, N: Heat-treated material that has already been charged into the furnace, but before the nth one is charged. Extracted number ΔSwb: Walking beam stroke error.