JPS592476Y2 - Slag removal device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a sludge removal device for a molten metal processing vessel, which particularly aims to improve workability.

In recent years, there has been a call for a shift towards quality over quantity in steelmaking operations, and in particular the need to manufacture high-quality ultra-low sulfur steel has made the removal of sulfur S from molten steel an important technical issue in the steelmaking process. It is.

Conventionally, in-furnace desulfurization in a converter has been considered from the perspective of the blowing process, and expectations have been very low.The blow-off sulfur value after blow-off often exceeds the standard value, so re-blowing is required, resulting in disadvantages in terms of time and production. In addition, the type of steel had to be changed, which disrupted planned production and caused distortions in the production process.

Incidentally, the slag in molten steel is either soda ash or other desulfurization agent or slag after desulfurization treatment, and contains a large amount of sulfur S. In order to prevent resulfurization from this slag during converter blowing, this slag is Removing slag leads to removing sulfur in molten steel.

Therefore, in order to solve the above-mentioned problems, the best method is to remove the slag from the hot metal in the hot metal ladle at the time when the hot metal can be pretreated in the mixer or other hot metal ladle, that is, immediately before charging into the converter. In the conventional slag removal method, the work of scraping the slag with a slag scraping board, measuring the temperature of the hot metal in the hot metal pot, and sampling the work were carried out separately by several workers using dedicated equipment. Because of this, the work efficiency was poor and it was not possible to save labor.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional methods, and uses mechanisms that rationally arrange slag scraping work, temperature measurement work, and sampling work on one work cart.
The purpose is to improve work efficiency and save labor by making it easier and faster for people to use work tools.

An embodiment of this invention will be described in detail below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, a pair of rails 3, 3 are laid on the working floor 2 on the side of the hot metal ladle 1, and wheels 4. . . . 4 is arranged.

A worker rides on the work cart 5 and controls the running of the work cart 5 itself, as well as the slag scraping mechanism 6, nitrogen gas blowing mechanism 7, and temperature measurement/sampling mechanism 8 mounted thereon. There is.

The slag scraping mechanism 6 mounted on the work trolley 5 includes a sludge scraping plate support 9 that is guided so as to be movable back and forth in the running direction of the trolley.
At the same time, a long slag scraping arm 11 having a tip supporting a slag scraping plate 10 for scraping slag on the hot metal F in the hot metal ladle 1 is provided, and the slag scraping arm 11 It is supported by a turning machine 12 provided on the scraper support stand 9, and can be turned vertically and horizontally under the control of the operator.

The slag scraping plate 10 is designed to be replaceable with the slag scraping arm 11.

The nitrogen gas blowing mechanism 7 mounted on the work trolley 5 is
A pair of parallel support arms 13a extending in the trolley running direction
, 13b, and the support arm 13a.

The swivel 14.14 portion provided at the rear end of 13b is slidably guided on both sides of the guide rail 15 that is cantilevered at the front of the work cart 5, and the sludge scraping arm 11 is One support arm 13a can be turned to the right in the figure, and the other support arm 13b can be turned to the left in the figure.

A graphite immersion pipe 16.16 for directly blowing nitrogen gas into the hot metal F in the hot metal ladle 1 is supported at the tips of the support arms 13 a and 13 b.
Nitrogen gas is supplied from the rear ends of 3a and 13b through tubes 17.17.

Temperature measurement/sampling mechanism 8 mounted on the work cart 5
A support arm support stand 18 that is guided so as to be able to move back and forth in the running direction of the bogie is installed, and a temperature measuring element 19 and a sampling member 20 immersed in the hot metal F in the hot metal ladle 1 are placed at the front and back of the tip. A long support arm 21 supported on
The rear end of the support arm 21 is connected to a cylinder 22 (swivel) attached to the support arm support stand 18 so that it can pivot in the vertical direction about a hinge part 23. .

The lead wire 24 of the temperature measuring element is connected to a hanging tool 27 of a hanging rail 26 attached to the lower surface of the hot metal exhaust duct 28 via a rising bar 25 fixed to the support arm support stand 18.
．． . . . 27 to suspend and support the support arm in a spiral manner so that it can respond to the back and forth movement of the support arm support stand 18.

To use the sludge removal device configured as described above, a worker controls the movement of the work cart 5 to drive it to the working position, and operates the nitrogen gas blowing mechanism 7, the sludge scraping mechanism 6, and the temperature measurement/sampling mechanism 8. The immersion pipe 16, 16 of the nitrogen gas blowing mechanism 7 is controlled to move the immersion pipe 16, 16 of the nitrogen gas blowing mechanism 7 at the back of the hot metal pot 1 by the wave force generated by blowing nitrogen gas (hereinafter referred to as bubbling).

), the slag is held in a position where the slag blows toward the pot mouth 1a, and the vertical height is maintained to such an extent that the slag scraping plate 10 of the slag scraping mechanism 6 does not scrape out the hot metal F. - Set the temperature measuring element 19 of the sampling mechanism 8 and the tip of the sampling member 20 while maintaining the vertical height so that they are immersed in the hot metal F.

Nitrogen gas is supplied from an external nitrogen gas supply source (not shown) through the tube 17, and is blown into the hot metal F through the immersion pipe 16.16 at the tip, causing bubbling. The slag on F moves toward the pot opening 1a.

Then, when the slag scraping plate support 9 is moved in the running direction of the cart, the slag is scraped out from the pot opening 1a by the slag scraping plate 10.

In this case, the slag is blown toward the pot mouth 1a side by the bubbling effect of nitrogen gas, so the amount of movement of the slag scraping plate 10 is small, and a large amount of slag can be removed at once.

In the above-mentioned slag removal work, the support arms 13a and 13b are moved back and forth according to the situation of the sludge removal work, so that even when the slag removal is near the end, the sludge is not distributed over a wide area due to bubbling, and the support arms 13a and 13b are moved around the pot mouth 1a without distributing the sludge over a wide area. The slag can be collected and quickly scraped out using the slag scraping plate 10.

Until the slag removal is completed, the temperature measurement of the hot metal F is completed with the temperature measuring element 19, and after the slag removal is completed, the hot metal F is sampled with the sampling member 20 to complete the work.

As is clear from the above explanation, this invention rationally arranges the slag scraping mechanism and the temperature measurement/sampling mechanism on one work cart, so it is possible to perform slag scraping work, temperature measurement work, and sampling. The work can be done efficiently by one person using the work tool, greatly improving work efficiency and saving labor.

In addition, a nitrogen gas blowing mechanism was installed on the work cart, so
Furthermore, slag removal work can be performed effectively.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the sludge removing device according to this invention, and FIG. 2 is a side view of FIG. 1. 1...Hot metal pot, 2...Working floor surface, 3.
...Rail, 5...Work trolley, 6...
... Sludge scraping mechanism, 7... Nitrogen gas blowing mechanism, 8... Temperature measurement/sampling mechanism, 9...
...Slag scraping board support stand, 10...Slag scraping board, 11...
... Slag scraping arm, 12 ... Swivel machine, 18.
... Support arm support stand, 19 ... Temperature measuring element, 20 ... Sampling member, 21 ...
...Support arm, 22...Cylinder (swivel)
.

Claims (1)

[Scope of utility model registration request] A work trolley that can run freely on a pair of rails laid on the work floor on the side of the molten metal processing container is placed, and a support arm with a nitrogen gas blowing pipe attached to the tip is mounted horizontally on the work trolley. A rotating machine that supports the pipe so as to be able to rotate in the directions and move in the direction of the trolley to position the pipe at the back of the molten metal processing container, and a slag scraping arm that has a replaceable slag scraping plate attached to its tip. , a slag scraping plate support that is rotatably supported in the vertical and horizontal directions and movable in the running direction of the trolley, and is capable of moving the slag scraping plate from the back of the molten metal processing container to the front striped direction; and a temperature measuring plate. Equipped with a support arm support stand that supports a support arm with an element and a sampling member attached to its tip in a vertically pivotable manner and is movable in the running direction of the trolley, each task of slag scraping, temperature measurement, and sampling can be carried out in one step. A sludge removal device characterized in that it is operated from a work cart.