JPS6026802B2 - Sublance probe attachment/detachment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sub-lance flowbe attachment/detachment device that reduces attachment/detachment time.

In converter operation, it is essential to measure the temperature and understand the composition of the steel in the furnace.
A worker approaches the vicinity of the converter mouth with a ladle with a long handle or a side temperature probe with a built-in thermocouple, and immerses the ladle etc. Temperature measurements and steel samples were taken; however, in addition to the poor work environment in which workers had to get close to the converter mouth, the work was also difficult because it disturbed the converter. There were problems such as the steel in the furnace flowing out of the furnace and causing a drop in quality, and the inability to obtain information on the steel during refining.

Therefore, in order to solve the above-mentioned problems, a sub-lance device as described below is installed above the converter mouth to monitor the temperature of the steel bath during the converter steelmaking process and to sample the composition of the steel grade. (Refer to Japanese Unexamined Patent Publication No. 1741/1983), the sublance device is a probe with a built-in thermocouple and a sample box for measuring the temperature of converter steel and collecting samples. A lifting device for inserting or extracting a probe into or out of the furnace, and a probe attaching/detaching device for attaching a probe to the lifting device or removing a probe that has been used (temperature measurement, sample collection). Currently, the probe is automatically attached to and detached from the elevating device.

However, the probe attaching/detaching device in the above-mentioned sublance device performs all operations such as probe storage, cutting out from the storage probe, attaching the probe to the lifting device, and extracting and discharging the used probe from the lifting device into one unit. As shown in the explanatory diagram of the probe attachment and detachment work in Figure 1, each operation must be performed in order, and one cycle of probe replacement (attachment and detachment) is required. The work required approximately 170 seconds.

That is, in the probe attaching/detaching operation, the supplement 2 with the probe 1 attached thereto is lowered by an elevating device (not shown) for side temperature and/or sample collection.
(2) Next, the tip of the blow-boo is immersed in the steel plate in the converter 12 to a preset depth, and the side temperature and sample collection operations are performed by soaking for a certain period of time (about 5 seconds). (2) Next, the sub-lance 2 is raised to a predetermined layer using a lifting device.
(2) Next, the used (side temperature, sample taken) blow-boo is removed using a probe attachment/detachment device (not shown). (2) Next, the used blow-boo is discharged to a predetermined location by the probe attachment/detachment device. (2) Next, cut out the new probe 1 from its storage location. (2) Next, the new probe 1 which has been cut out is moved to a position where it is attached to the sub-lance 2 by the probe attachment/detachment device.
(2) Next, the new probe 1 is attached to the sub-lance 2 by the probe attachment/detachment device, and is placed on standby for the next measurement. It consisted of eight steps. In addition, the temperature measurement and sample collection of the steel in the converter using the sublance device are not limited to only at the end of smelting, but the situation of the steel in the converter can be grasped even during the refining process, and the subsequent work required until the end of smelting is carried out. Production efficiency can be improved by accurately understanding the conditions (setting the amount of auxiliary materials such as cooling input into the furnace, correcting the amount of oxygen for refining, etc.) and avoiding post-blowing or post-refining cooling work. As well as raising
The so-called dynamic control of converters has been implemented to improve the unit refractories of the furnace body and the Mn yield, and the best time to obtain intermediate information on the steel inside the furnace is at the scheduled end of refining. As a result of many experiments, it has been found that the optimum time is about 2 minutes. Therefore, in order to obtain such intermediate information, it is necessary to keep the time for one cycle of the probe attaching and detaching work as described above within 2 minutes. It was necessary to do so. For this reason, there is a problem in that optimal intermediate information cannot be obtained in the probe attachment/detachment work shown in FIG. 1. Furthermore, the above-mentioned sublance device
Converter furnace □ In the very limited space near the top of the waste gas hood installed at the top, the main lance device for oxygen blowing installed for converter refining, soot solvent is injected into the converter furnace. It is installed in such a way that there is no interference with the input chute device for attaching and detaching the probe, and the attached equipment of the exhaust gas hood, and it is also a mechanism that combines each device for attaching and detaching the probe into one unit, and is mounted on the exhaust gas hood. ``The number of new probes that can be stored will be limited from the perspective of easing load conditions, which means that workers will have to go to the upper part of the furnace more often to replenish the new probes, and maintenance and inspection will be required. Therefore, in order to eliminate the above-mentioned problems, the inventors of the present invention aimed to eliminate the above-mentioned problems by:
As a result of the two unit mechanisms, each operation must be performed in sequence, resulting in a longer operation time for one cycle of attaching and detaching the probe.

■Since the single-unit probe attachment/detachment device is mounted on the exhaust gas hood, it is not possible to improve working conditions. ■When raising and lowering the lance, the lance itself must be two meters long.
Because it is very long, its lifting speed is reduced to the current speed (12 h'm).
In~15 h'mjn) or more is dangerous because the swing of the lance becomes large. Focusing on this point, we conducted research and found that the work of attaching and extracting new probes and used probes accounts for about 11 out of the total time required for attaching and removing probes, which takes about 16 hours. Therefore, if the single-unit probe attaching/detaching device is placed separately in the device mirror that performs each of the above operations, the time required for attaching and extracting new probes and used probes will be reduced. They found that it was possible to shorten the time required, and that it was no longer necessary to mount all the devices on the waste gas hood, allowing for an increase in the number of new probes stored. This invention was made based on the above knowledge, and includes a probe extraction/discharge device for extracting and discharging a probe at the tip of a sublance that can be raised and lowered from above a converter, and a device for storing a new probe to be attached to the tip of the sublance. a probe storage/cutting device installed at a location remote from the converter for cutting the probes together with the probe; and a track provided to communicate between the probe extraction/discharge device and the probe storage/cutting device. and a probe conveying and mounting device for conveying the new probe cut out by the cutting device to a position directly above the probe extracting/discharging device via the track device and attaching it to the tip of the sub-lance. It is characterized by a sub-lance probe attachment/detachment device.

The present invention will be explained below with reference to examples and drawings.

FIG. 2 is a schematic plan view of a sublance device to which the present invention is applied, and FIG. 3 is a side view of the same. As shown in the figure, 3 is a converter body, 4 is a waste gas hood provided on the top of the converter body 3, 5 is a refining lance hole, and 6 is a sub-lance hole. A refining lance (main lance) 7 is inserted into the refining lance 5, and a sub-lance 2 having a probe 1 attached to its tip is inserted into the sub-lance hole 6.

A probe extracting/discharging device 8 is provided above the sub-lance hole 6 for extracting and ejecting the probe 1 at the tip of the sub-lance 2 which can be raised and lowered. By grasping the used probe 1 taken out from the sub-lance 2 and further raising the sub-lance 2, the used probe 1 is removed from the sub-lance 2, and then the used probe 1 that has been taken out is discharged to the outside. It is supposed to be done.

Directly above the probe extraction/ejection device 8 is a probe conveyance/installation device 9 for mounting a new probe 1' on the tip of the supplement tip 2.

The sub-lance 2 is located at a position away from the converter body 3.
A probe storage/cutting device 10 is provided for storing and cutting out a new probe 1' to be attached to the tip of the probe.
The probe storage/cutting device 101 is provided with a track device 11, and the probe transport/mounting device 9 is moved via the track device 11. The device 9a grabs the new probe 1' in the device 10, and then transports the probe 1' to a position immediately above the probe extracting/discharging device 8 via the track device 11 again. The probe conveyance/installation device 9 has a mounting portion ga such that the probe 1' is mounted on the tip of the descending support 2 at a position directly above the probe extraction/discharge device 8 for mounting the probe. After the new probe 1' is attached to the tip of the descending sub-lance 2, the attachment part 9a moves backward, and further moves to the probe storage/cutting device 10, and then moves to the next probe. The mounting section 9a grasps the new probe and then moves it to the standby position. The probe storage/cutting device 10 includes:
A new probe 1' to be attached to the sublance 2 is selected, the selected new probe 1' is extruded by an extruder (not shown), the extruder is moved backward, and then the feeder (
The selected new probe 1' is fed to the probe upright position by an upright machine (not shown), then the feeder is retracted, and then the selected new probe 1' is fed by an upright machine (not shown).
The upright machine is adapted to be turned over after the mounting section 9a of the probe conveying/mounting device 9 finishes gripping the selected new probe 1'.

With this configuration, when the probe attaching/detaching work including the measurement work such as measuring the temperature of the steel plate and sampling is performed as described above, the probe attaching/detaching work is shown in FIG. 4 as an explanatory diagram.

That is, the lowering of the probe by the suprance lifting device,
After completing the side temperature, sample collection, and raising of the probe (used probe) using the probe,
The probe extraction/ejection device 8 extracts and ejects the used probe from the sub-lance 2, and the probe storage/extraction device 1 is used to install a new probe. An operation of cutting out the probe so that it is gripped by the mounting section 9a of the probe conveyance/mounting device 9 is performed in parallel. When the probe extraction/ejection device 8 finishes discharging the used probe, the probe conveyance/installation device 9, which had previously grasped the new probe, attaches the new probe to the sub-lance 2 that has been lowered by the sub-lance lift. (This operation is carried out in parallel with the operation of cutting out a new probe by the probe storage/cutting-out device 10).Then, the probe conveying/mounting device 9 grabs the next new probe and waits. Through such parallel work, when the mounting section 9a of the probe transport/mounting device 9 finishes mounting a new probe on the tip of the sub-lance 2 and retreats, one cycle of the probe mounting/detaching work is completed, and in this one cycle The time required was approximately 11 minutes (numbers in the figure represent seconds). As explained above, in this invention, the work of replacing the probe at the tip of the sub-lance and the work of cutting out the new probe to be used can be done in parallel, so compared to the conventional method, the probe can be inserted into the middle of the main body. The installation and removal work time can be shortened, and therefore optimal intermediate information on the steel rating in the furnace can be obtained.

Furthermore, since the probe storage/extraction device is constructed so as not to be placed on the converter waste gas hood, it can be made larger, and therefore the number of probes stored can be increased and the number of operations for replenishing probes can be reduced. Since the converter waste gas hood only supports part of the track system, its load conditions are alleviated.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the probe attachment/detachment work, Fig. 2 is a schematic plan view of a sublance device to which the present invention is applied, Fig. 3 is a side view of the same, and Fig. 4 is an explanatory diagram of the probe attachment/detachment work according to the present invention. be. 1... Probe, 2... Sublance, 3... Converter furnace body,
4... Waste gas hood, 5... Refining lance hole, 6... Sub-lance hole, 7... Refining lance, 8... Probe extraction/discharge device, 9・・・・・・
Probe transport/installation device, 10...Probe storage/cutting device, 11...Trajectory device, 12...
...Converter. Younger brother's figure 2 figure 3 figure size

Claims (1)

[Claims] 1. A probe extracting/discharging device for extracting and discharging the probe at the tip of the sub-lance that can be raised and lowered above the converter, and a probe at a location away from the converter for storing and cutting out a new probe to be attached to the tip of the sub-lance. An installed probe storage/cutting device, a track device provided to communicate between the probe extraction/discharge device and the probe storage/cutting device, and a probe cut out by the cutting device. A probe attachment/detachment device for a sublance, comprising: a probe conveyance/installation device for conveying a new probe via the track device to a position directly above the probe extraction/discharge device and attaching it to the tip of the sublance. .