JPS6233056A - Method of repairing refractory plate used for closing appliance of slide valve - 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 [Industrial Application] The present invention relates to a sliding valve closing device of a metallurgical vessel having at least one flow opening and a closing surface damaged by a wear area, a fixed bottom plate or a movable The present invention relates to a method of repairing a fireproof plate used as a sliding plate.

[Conventional technology]

Reduces the expense of replacing worn plates during operation, where plates tend to wear out at the flow opening due to cracking due to thermal stress, corrosion and erosion of the hot water jet, and frictional force between the bottom plate and the sliding plate. It is known to repair or care for or repair. Repaired plates are used instead of new plates, in these plates the worn areas of the flow openings are generally straightened by machining, in which case the missing plate material is replaced by prefabricated inserts or fillers. has been replaced by. Therefore, German Patent No. 32 43 305 proposes the following method steps. That is, the worn flow holes are drilled concentrically close to the periphery of the plate and the holes are filled with refractory pouring material, optionally including prefabricated rings, with the flow cross section drilled; This ring delimits the flow opening in the sliding surface of the plate. In this case, the repair is limited to only the flow opening of the board, leaving the closed surface of this board untouched.

[The problem that the invention is trying to solve]

An advantage of the present invention is to simplify and improve the efficiency of board repair, including closure surfaces.

[Means for solving problems]

According to the invention, this problem is solved in principle in that the worn plate is provided with a new flow opening in the closing surface, and the worn flow opening is closed and configured as a new closing surface. Fireproof plates for sliding valve closures are thus repaired at the flow opening and at the closing surface, the method steps being simple to carry out and, moreover, achieving a clearly improved service life of the plates, these plates being practically Obtain the distribution outlet and closure surface of the new price value.

Worn flow openings, after cleaning, are advantageously closed with acidified plugs, which are applied at least to the sliding surface of the board with refractory putty, mortar, etc. in the worn area and installed. It will be done. In this case, the core obtained during drilling of the newly drilled outlet can be used as a closure plug for the old outlet.

Instead of using plugs, cleaned wear vents can be filled with a pourable refractory material that dries or sets quickly, smooth and flat to provide a sliding surface, including the wear area. . This method is particularly simple and easy to implement.

〔Example〕

The invention will be explained below with the aid of two exemplary embodiments.

Of the refractory wear parts of the closure device shown in Figure 1, 1 is 5F.
The fli inflow sleeve is shown, and 2 indicates the flow opening of this inflow sleeve. A stationary bottom plate 4 with a coaxial flow port 3 lies below this flow port, and the sliding surface 10 of a sliding plate 5 is in contact with the sliding surface 9 of this bottom plate. It is movable with an outflow sleeve 8 connected via ports 6 and 7. This is done in order to open, close and throttle the closing device, the sliding surfaces 9 and 10 of the two plates 4 and 5 sliding overlapping each other in a leak-tight manner and producing a hot water jet through the flow openings 3 and 6. ,
Because it is terminated and changed, the wear area around the flow opening rim after a short period of operation time! ! and 12 occur, and these areas of wear make it necessary to replace plates 4 and 5.

Replaced old boards, whose closed area is usually still sufficiently safe for operation, are repaired or restored after visual inspection and thorough cleaning, preferably using mechanically actuated copper brushes. . For this purpose, as shown in FIGS. 2 to 4, for example, the sliding plate 5 is provided with newly drilled flow openings 6a in the extensive intact closure area 13, while The core as a plug 14 thus obtained during drilling allows the old flow opening 6 to
is closed using refractory mortar 15 or the like, and this refractory mortar or the like is applied to the wear area 1 on the sliding surface 10 of the plate 5.
2 is also applied or smoothed to become the new closing surface 13a.

If a reversal with sliding surfaces on both flat surfaces is to be repaired, first the second sliding surface should also be repaired, as indicated by the hatching at 16 in FIG.
After wear, the repairs described above are performed. Instead of the core obtained during drilling, a plug prepared by an interference fit can also be placed in the old flow opening 6 and after this the wear area 12 is leveled with refractory mortar 15 to the level of the sliding surface 104. The same repair method can be used to repair the sliding plate 5.
Of course, the present invention is also applied to the bottom plate 4 which acts in conjunction with the base plate 4.

The arrangement according to FIGS. 5 to 7 shows repair of the fireproof board with pourable refractory material instead of repair of the plug. Rotary plate 2 to be repaired, used in a rotating closure device
0, and this rotary plate has a wear area 23 in the flow opening 21 or 22 that endangers safety. H wear distribution area 23
After suitably observing and cleaning and after opening new flow holes 21a and 22a in closing surfaces 24 and 25,
The worn flow openings 21 and 22 are filled with refractory material 26 and the fill on the ribbed surface 27 of the plate 20 is leveled out, so that new closing surfaces 24a and 25a are created.

In all cases, the restoration of the plate carried out according to the invention is sufficient for reliable operation.

Nevertheless, it is possible to additionally polish the flat side of the plate which is provided as a sliding surface.

Brief explanation between planes 1st QI is a schematic sectional view of the refractory wear part of the linear displacement closure device with a worn bottom plate and sliding plate, Figure 2 is a plan view of the worn sliding plate according to Figure 1, 3 is a plan view of the repaired sliding plate; FIG. 4 is a sectional view of the repaired plate portion of the plate according to FIG. 3; FIG. FIG. 6 is a plan view of the repaired plate corresponding to FIG. 5, and FIG. 7 is a sectional view of the repaired plate portion.

5...Sliding plate, 6,6a+21.21a+2L22a
... Distribution port, +3+! , 3a+2L24a+25+2
5a ``Closing surface, 20...Rotating plate J-''''' π 2 , , , Flow port 3 , , , Flow port 4 , , , Bottom plate S , , , , Motion Plate 6 , Distribution port a , Distribution port 8 , Outflow sleeve 9 , 4') Distribution port io , , ,, r
Bone surface 10 ,,,,,sliding surface 10 ,,,,
, rbone 13 a , , , closed surface
10 a...

12. Wear area 14. Plug
12 , , , ys wasted area 13101.1
4. □□ 12 a,,,,.

13a　,,,,,closed surface 14a...

I S , , Mortar 221100. Distribution port 240001. Closed surface 2
30110. *N area 22 a , , , distribution port
24a , , Closing surface 24a , , Closing 1
m25,,,,. Closure m'
l 7 ,,,, j+i li1nT27 ,,,,
, sliding surface

Claims (1)

[Claims] 1. Repair of a refractory plate used as a stationary bottom plate or a movable sliding plate in a sliding valve closing device of a metallurgical vessel, with at least one flow opening and a closing surface damaged by a worn area. In this method, the worn plate (5 or 20) is replaced by a new flow opening (6a
or 21a, 22a) and worn out flow ports (
6 or 21, 22) is closed and a new closed surface (1
3a or 24a, 25a) A method for repairing a fireproof board used in a sliding valve closing device, characterized in that it is configured as 3a or 24a, 25a). 2. The worn flow opening (6) is cleaned and prepared with a stopper (
14) The method according to claim 1, characterized in that the method is characterized in that it is marked with 14). 3 The plug (14) is at least on the sliding surface (10) of the plate (5)
3. A method according to claim 2, characterized in that it is applied and attached to the wear area (12) by fireproof putty, mortar (15) or the like. 4. Method according to claim 2, characterized in that the core obtained during drilling of the newly drilled flow opening (6a) is used as the plug (14). 5. Worn and cleaned flow ports (21, 22) are replaced with rapidly drying or solidifying pourable refractory material (24).
2. Method according to claim 1, characterized in that the sliding surface (27) is filled smoothly and evenly, including the wear areas (23), with the sliding surface (27).