JPS6060488A - Molten metal slag removal method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for removing bathwater slag by sucking the slag on the bathwater together with air into a suction head and solidifying the slag with cooling water in the suction head. .

In the above 1G hot water slag removal method, the suction head in the upper standby position is lowered all at once to the set suction height close to the bath water slag (when suction is started, at the beginning of slag suction) A large amount of slag exceeding the set amount may be suctioned at once, and as a result, 1 ft of steam generated as the suction slag is cooled with water in the satan-yong haesod increases by a large amount. There was a problem in that the degree of vacuum, that is, the suction pressure for one suction head was significantly lower than the number of pumps, making it unstable and making the slag suction less smooth.

One of the objectives of the study was to develop a rational control system for the dark john head, based on the research results on excessive slag suction at the beginning of suction 1) H, to enable smooth start of slag suction. be.

The special value of the non-explosion J method is that in the method for removing slag from a bath water in bacteria, the slag suction is started from the slag suction start position to the slag steady suction +f, fi position! If K, when lowering the head, measure the degree of vacuum for the previous head, and lower the head in stages so that the vacuum level of the measured value almost matches the state of change. Its functions and effects are as follows.

Considering the cause of excessive slag suction at the start of 1 pumping, we find that in the state of 171 slag 1 suction, the suction head sucks only solid air, so the length of the suction head as well as that of the suction head increases. ] The pressure loss in the continuous suction pipe is extremely small, and for this reason, the slag suction start condition 16 (G
In a), the suction force (F) at the suction port of the buttjohn head is considerably higher than the steady suction force (Gf) of the slag.

Therefore, when the suction head is lowered all at once from the slag suction start height f(a) position to the slag steady state I pumping operation Hf) position, the suction force (F) is as shown in Figure 4. It moves from state 1a to the state of θ along the broken line curve, and from the steady state value (Ff) it becomes like the curve〉! This results in an increase of 1 greater than the constant amount (Qf), and the slab suction M (G) sucked into the suction head also greatly increases beyond the constant amount (Gf).

Therefore, in view of the above-mentioned results, when lowering the suction head from the slag suction start height (Ha) position 111 to the slag steady suction opening position (Hf), the degree of vacuum (Q) of the suction head is measured, and the suction head vacuum level (Q) is measured. The button head is lowered step by step so that the change in the measured vacuum (Q) matches the ideal change in vacuum (dotted chain line in Figure 3) set in advance according to the properties, etc. Therefore, the degree of vacuum (Ql) is increased gradually and stepwise to avoid an unexpected wide increase (as indicated by the blank line in Fig. 8), and in other words, the suction head Suction force (
F),! The steady value (
As a result of step 7, by gradually increasing the slag suction amount (G), it is possible to reliably avoid excessive slag suction at the start of suction, and to reduce the descending speed of the suction head. It is possible to keep the slag as large as possible and avoid low efficiency, while also making it extremely smooth to start pumping 1 slag due to the generation of a large amount of water vapor. I was able to improve it.

In addition, by lowering the suction head step by step and stopping it midway, it is possible to adjust the measuring instrument's degree change state to the set state by only continuously controlling the descending speed. There is an advantage that the control configuration for automatically lowering the suction head and the configuration for lowering the suction head can be simplified.

Next, an embodiment of the present invention) will be described in detail based on illustrative drawings.

As shown in Figure 1, the slag (3) floating on top of the hot water (2) in the ladle (11) is removed with air using a butt-john head (4) that can be operated vertically and horizontally. suction,
I! inside the suction head (4)! 5 (N cooling water is used to solidify the pumped slag into powder, and the solidified slag, solid air, excess cooling water, and water vapor generated due to cooling are transferred to the suction pipe (6 ) to the -C separator (6).

Then, the water vapor and solid air separated from the solid matter are transferred to the condenser (7) from the Separator V-Li+61VC, and with the condensed water removed, only the solid air is pumped (
8), and on the other hand, the separate lake tG
Solidified slag and water separated from gas by + water tank (
9) The water is collected at 1°C and the precipitated and solidified slag is pumped and collected by a conveyor (101) attached to fi+91.

From the VC, which starts suction of slag from the swamp by the 10th section (4), Figure 2 (A) to (E), Figure 3, and Figure 4 VC Bocho. , bath water slag (3)
The suction head (4), which is at a standby height Hl) where suction is not possible, is lowered in the suction operation state, and the first electrode rod (with a downwardly discharging shape) previously installed on the Pukunyong head (4) is lowered. 1 Suga 1': When the suction head (4) reaches the slag suction preparation height (B2), the first electrode rod 111
) automatically stops the descent of the suction head (4), and causes the first electrode rod (1) to be pulled to one side.

Then, pull the suction head (4), 1
The front part is automatically lowered by a preset distance t from the suction preparation height 012) to position it at the suction start height Ha), and connects the suction head (4) and the suction line 1/path (5). + to pend tube θno and vacuum bonder (8)
Check the vacuum level (Q) inside the bent pipe (1"4), which is expressed based on the information from the installed vacuum level sensor The degree of vacuum caused by slag suction (Q
) is confirmed by an increase in improvement.

If the degree of vacuum (Q) does not rise to the suction start value (Qa) when checking the increase in the degree of vacuum (Q), the viscosity of the bath water slag (3) becomes high and a so-called skin-stretching condition occurs. If the skin is found to be contaminated, measures are taken to break the skin, such as by stirring.

If it is confirmed that the slag suction has been properly started by confirming that the rotational vacuum degree (Q) has increased, the suction head (4) can be moved to 81j by self-help control operation to start the suction head descent. Automatically lower the set distance (Δh) at low speed from the suction start point (Ha), and then
A one-point chain green chain is placed in section 1;
Repeat the descending operation of the set distance (Δh) in several stages at every set time (1) so that the solid line) matches the slag suction start value (Qa).
to increase in steps tryJ from to the steady-state value (Qf),
In other words, suction head (4) as shown in Figure @4.
The suction force (F) at the suction port is calculated from the situation in ■@
The suction head (4) is lowered to gradually increase the slug 1 and the suction jf (G) from the suction start value (Ga) so as to maintain the steady value (Ff) and then shift it to the state of
This facilitates the start of slag suction.

Then, the second gage pole rod attached to the suction head (4) is used to return the stocks by descending the set distance (Δh).
When the slag comes into contact with the bath water slag (3), that is, the degree of vacuum (Q) reaches a steady value (Qf) and the slag I suction amount (G)
Slag steady suction 11゛hσ() where is the normal amount (Gf)
lf) When the I/C loop head +4 is reached, the descending operation is stopped based on the information from the second power station 4k i+ 041, and from then on,
Detection of slag of the second electrode rod (14) in the same way VC
Based on the suction head (3) against the bath slab (3)
4) Steady suction is continued while maintaining the steady state of slag 1 and N stone removal Hf).

In addition, in order to lower the satanyon head (4) in stages so that the measured vacuum value matches the setting change state, the suction head (4) is moved at the set speed for a set time (as described in 11J).
Instead of gradually lowering σ by the set lowering distance (Δh) every time t), various types of tools are lowered in stages based on information from the degree detection sensor 03) or u5). (1), or the descending distance (Δh), its T'-
It is possible to change the method in various ways, such as automatically controlling the change iM of the vacuum degree measurement value due to rain to match the setting condition.

[Brief explanation of the drawing]

The drawings illustrate an example of the bath water slag removal method according to Honenmei. This is a graph showing the relationship between chopped slag 1 and 1 and attraction force. (2)... Bath bath, (3) Old... slag, (4
)...Suction head, (QJ ------
-Vacuum degree, (H)/old...Slag height.

Claims (1)

[Claims] A method for removing slag from hot water, in which the slag (3) on top of the TR8 hot water (2) is sucked into a VC1 in a satanyon head (4) together with air, and the slag is converted into one by cooling water in the long noyon head (4). , Slag suction 1 FJ starting height Ha
) When lowering the dark john head (4) from the slab position to the ``ht'' position, measure the firmness (Q) of the dark john head (4).
At the same time, the actuality measurement value Ia almost matches the setting value, so that
A bath water slag removal method that removes slag in stages.