JP4456913B2 - Method for removing iron-based oxides from components of a skater crater unit - Google Patents

Description

The present invention relates to a method for removing an iron-based oxide that is welded or fixed to a surface of a copper-based substrate formed of a constituent member of a skater crater unit .

Conventionally, a kiln bath immersed in a mixed acid aqueous solution of nitric acid, sulfuric acid and hydrochloric acid has been widely employed as a method for cleaning copper products, but there is a problem that nitrous acid gas is generated during cleaning. For this reason, a cleaning method has been proposed that is immersed in a mixed aqueous solution of hydrogen peroxide, sulfuric acid, and a corrosion inhibitor (for example, a nonionic surfactant). However, in this method, since chemically unstable hydrogen peroxide is used, it is necessary to sufficiently manage the mixed aqueous solution, and the copper product cleaning method becomes complicated and stable cleaning is continuously performed. It becomes difficult.
Therefore, it has a first step of performing a degreasing treatment with a solvent or an alkali, a second step of performing an acid washing treatment with a mixed solution of an acid and a surfactant, and a third step of carrying out a neutralization treatment with a neutralizing agent and a water washing treatment. A copper cleaning method has been proposed (see, for example, Patent Document 1).
In addition, as a general cleaning method, there is a method for efficiently cleaning an object to be cleaned by immersing the object to be cleaned in a cleaning liquid and applying ultrasonic vibration to generate cavitation in the cleaning liquid (for example, Patent Documents). 2).

Japanese Patent Laid-Open No. 5-117887 JP-A-5-13400

However, the method described in Patent Document 1 is intended to remove cuprous oxide formed on the very surface portion of a copper product and oil adhering to the surface, and is described in Patent Document 2. These methods simply remove the deposits adhering to the surface, and none of them is suitable as a method for removing the iron-based oxide that is welded or fixed to the surface of the copper-based substrate.
Therefore, as a method of removing the iron-based oxide deposited on the copper-based substrate, for example, immersing the copper-based substrate in a treatment agent having a characteristic of selectively dissolving the iron-based oxide without dissolving copper. Has been done. However, since dissolution of the iron-based oxide proceeds only at the interface with the treatment agent, there is a problem that much time is required to completely dissolve the iron-based oxide.

The present invention has been made in view of such circumstances, and a method for removing iron-based oxides from constituent members of a skater crater unit capable of quickly removing iron-based oxides without damaging a copper-based substrate. The purpose is to provide.

Method of removing iron oxide from a component of Scar fur crater unit according to claim 1, wherein along the object, Scar fur crater which constitutes the tip of the device for supplying flames scarfing the surface layer portion of the steel strip In the method of removing the iron-based oxide that is welded or fixed to the surface of the copper-based substrate formed of the constituent members of the unit ,
A step of disassembling the kerffer crater unit, on which the iron-based oxide is welded or fixed on the surface, on a disassembly base,
Loading the disassembled component on a mounting table through which fluid can pass; and
The mounting table on which the constituent members are placed is immersed in a processing tank in which a processing agent containing 10% by weight or more and 25% by weight or less of ammonium thioglycolate is stored, and is provided at the bottom of the processing tank. Placing on the mounting part of the holding table,
By operating an ultrasonic vibrator arranged inside the holding table, fine cracks are generated in the iron-based oxide that is welded or fixed to the constituent members and dropped into the treatment agent, and the treatment is performed. Circulating the treatment agent in the tank through a filter unit and a circulation pump for removing the iron-based oxide mixed in the treatment agent;
After the removal of the iron-based oxide is completed, the step of pulling up the mounting table on which the constituent members are placed from the processing tank and placing it on a rotary table provided at the bottom of the drying tank body;
The treatment agent is attached by attaching a lid of the dryer main body, rotating the rotary table, rotating the mounting table placed on the rotating table, and applying water to the constituent members loaded on the mounting table. Washing off,
After the treatment agent is washed, the method includes a step of irrigating the component member washed with water by applying water vapor to the rotating mounting table and raising the temperature of the component member to dry the component member.

When a copper base is immersed in a treatment agent and ultrasonic vibration is applied, cavitation occurs in the treatment agent, and an impact force acts on the iron-based oxide existing on the surface of the copper base. For this reason, the fine crack by an impact force generate | occur | produces in the surface layer part of an iron-type oxide. And since the chemical | medical effect | action which a processing agent approachs into the generated fine crack and melt | dissolves an iron-type oxide acts, it is thought that the growth of a fine crack is accelerated | stimulated. Further, since cavitation occurs even in the treatment agent that has entered the fine crack, it is considered that the impact force acts directly on the fine crack and the growth of the fine crack is further promoted. Here, the iron-based oxide is, for example, each iron oxide such as ferrous oxide, iron tetroxide, and ferric oxide, a mixture of two or more of the above iron oxides, or iron and one or more of the above Refers to a mixture with each iron oxide.
As a result, the surface layer portion of the iron-based oxide is gradually dropped into the treatment agent while being divided into fine regions by the growth of fine cracks, and a new surface is formed on the iron-based oxide. Therefore, by continuously applying ultrasonic vibrations to the treatment agent, it is possible to repeat the collapse of the surface layer and the formation of a new surface in the surface layer of the iron-based oxide.
Even if the copper base is immersed in the treatment agent and ultrasonic vibration is applied to repeatedly remove the iron-based oxide on the surface, the surface of the copper base is slightly roughened. There is no problem in actual use or lifetime.

The treating agent contains ammonium thioglycolate. Since ammonium thioglycolate has almost no volatility or fuming property, management as a treating agent becomes easy.

Here, the content of ammonium thioglycolate is 10 wt% or more and 25 wt% or less, preferably 14 wt% or more and 25 wt% or less, more preferably 17 wt% or more and 25 wt% or less. When the content of ammonium thioglycolate is less than 10% by weight, the dissolving power of the iron-based oxide is reduced and the immersion time is increased, which is not preferable. Moreover, even if the content of ammonium thioglycolate is set to exceed 25% by weight, the increase in the solubility of the iron-based oxide has reached its peak, and the increase in the processing agent cost is more remarkable than the improvement in the processing speed. Absent.
In addition, when content of ammonium thioglycolate is set in said range, the temperature of a processing agent is 10 to 40 degreeC, Preferably it is 15 to 30 degreeC. If the temperature is less than 10 ° C., the dissolution rate of the iron-based oxide becomes small, and even if the temperature is set to exceed 40 ° C., the dissolution rate of the iron-based oxide reaches its peak, and it is necessary to perform temperature control of the treatment agent. It is not preferable.

Method of removing iron oxide from a component of Scar fur crater unit according to claim 3, wherein, in the method for removing the claims 1 and 2, wherein the frequency of the ultrasonic vibration is 40kHz or less than 25 kHz.

By setting the frequency of the ultrasonic vibration to 25 kHz or more and 40 kHz or less, preferably 25 kHz or more and 30 kHz or less, cavitation can be effectively generated over a wide area of the copper base. If the frequency of the ultrasonic vibration is less than 25 kHz, the operation noise increases and the audible sound region is approached, which is not preferable. On the other hand, if the frequency of the ultrasonic vibration exceeds 40 kHz, the relative strength of the ultrasonic vibration is lowered, which is not preferable.
The input energy of ultrasonic vibration applied to the treatment agent is 4 to 10 W / liter per treatment agent unit volume. If the input energy of ultrasonic vibration is less than 4 W / liter, the effect of removing the iron-based oxide is small, and even if the input energy of ultrasonic vibration exceeds 10 W / liter, the effect of removing the iron-based oxide is expected. It doesn't improve enough.

Here, the skater crater unit constitutes the tip of a device that supplies a flame for cutting the surface layer of a steel slab, and preheats and discharges a mixed gas of oxygen gas and fuel gas as its constituent members An upper preheating block having a plurality of discharge ports at the front portion, a lower preheating block having a plurality of discharge ports at the front portion for preheating and discharging the fuel gas, and an oxygen supply unit having a plurality of oxygen discharge ports in a row A main body block that forms an oxygen supply groove by closely contacting the base of the upper preheating block on one side of the oxygen supply unit and the base of the lower preheating block on the other side, and a shoe connecting the lower preheating block and the main body block Has a block.
When the steel slab surface is cut, the molten iron oxide and molten iron scatter around, so the iron-based oxide is welded or fixed to the tip side (the side facing the slab) of the skater crater unit. To do.

And the said structural member is mounted in the mounting base through which fluid can pass, and is immersed in the said processing agent.
Thereby, a some structural member can be conveyed collectively and can be immersed in a processing agent. Moreover, since it can convey by a mounting base, the mechanization of conveyance becomes easy. In addition, since the fluid can freely pass through the mounting table, the processing agent can be present around the constituent members only by immersing the mounting table in the processing agent.

In the method for removing iron-based oxides from the constituent members of the skater crater unit according to claims 1 to 4, since the ultrasonic vibration is applied by immersing the copper-based substrate in the treatment agent, the surface layer of the iron-based oxides The chemical action of the treatment agent and the impact force due to cavitation act in combination on the microcracks generated in the part, which can repeatedly collapse the surface layer of the iron-based oxide and form a new surface. It can be removed from the surface of the copper base in a short time. For example, the removal time of the iron-based oxide, which required 300 minutes only by immersing in the treatment agent, can be shortened to 50 minutes by applying ultrasonic vibration.

In particular, since the treating agent contains ammonium thioglycolate, the management of the treating agent becomes easy, and the removal of the iron-based oxide can be performed easily and stably.

In the method for removing iron-based oxides from the constituent members of the skater crater unit according to claim 3, since the frequency of ultrasonic vibration is 25 kHz or more and 40 kHz or less, cavitation is efficiently generated in the treatment agent. Thus, it is possible to promote the generation of fine cracks in the surface layer of the iron-based oxide.

In the method for removing iron-based oxides from the constituent members of the sker fur crater unit according to claims 1 to 4 , the copper base is a constituent member of the spar fur crater unit for surface slab surface cutting. Although the molten iron oxide and molten iron are scattered during surface cutting and are welded or fixed as iron-based oxides, the iron-based oxides can be removed in a short time. For this reason, it is possible to shorten the time required for the maintenance of the skater crater unit, to improve the maintenance efficiency of the skater crater unit, and to reduce the maintenance cost.

In the method for removing iron-based oxides from the constituent members of the skater crater unit according to any one of claims 1 to 4 , the constituent members are placed on a mounting table through which fluid can freely pass and immersed in the processing agent. It is possible to convey the members in a lump and immerse them in the treatment agent so that the treatment agent is present around the component members, and it is possible to increase the number of the component members from which the iron-based oxide is removed per unit time. Become.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is an explanatory diagram of an oxide removal facility to which a method for removing iron-based oxides from the constituent members of a skater crater unit according to an embodiment of the present invention is applied , and FIG. 2 is a configuration in the removal method. FIG. 3 is a plan view of the mounting table on which the component member is placed in the removal method. FIG. 4 is a plan view of the placement table on which the processing agent is stored and the component member is placed in the removal method. FIG. 5 is an explanatory view of a treatment tank to be immersed, and FIG. 5 is an explanatory view of a cleaning tank that accommodates a mounting table on which the structural member is placed and cleans the structural member in the removal method.

As shown in FIG. 1, scar is an example of a copper-based substrate obtained by applying the method of removing the iron-based oxide of copper or a copper alloy from components of Scar fur crater unit according to an embodiment of the present invention The oxide removal equipment 10 that removes iron-based oxides from the constituent member 31 (see FIG. 2) of the fur crater unit disassembles the skater crater unit with iron-based oxides welded or fixed to the surface into the constituent members 31. A pedestal 11, a traversable first hoist mechanism 12, which is an example of a transporting means for transporting a kerfer crater unit to which the iron-based oxide is welded or fixed, to the disassembly table 11, The work table 13 for accumulating the constituent members 31 of the fur crater unit and temporarily storing them, and a traversing means that is an example of a conveying means for conveying the constituent members 31 from the disassembly table 11 to the work table 13 are possible. And a second hoist mechanism 14.
The oxide removal equipment 10 includes a mounting table 15 on which a plurality of component members 31 are stacked, a set table 16 that holds the mounting table 15 when the component members 31 are stacked on the mounting table 15, and copper or a copper alloy. A treatment tank 17 in which a treatment agent containing ammonium thioglycolate that does not dissolve and dissolves iron-based oxides is stored and the mounting table 15 on which the component member 31 is loaded is immersed, and treatment is performed after the iron-based oxides are removed. It has the drying tank 18 which inserts the mounting base 15 pulled up from the tank 17, removes the processing agent adhering to the surface of the structural member 31, and dries it. These will be described in detail below.

The first hoist mechanism 12 is attached to the ceiling, and includes a first hoist rail 19 that connects between an accumulation place (not shown) in which used scurfer crater units are stacked and the disassembly base 11, and a first hoist rail 19 The hoist rail 19 has a first hoist body 20 that moves up and down the scar fur crater unit that has been hooked. And the decomposition | disassembly stand 11 is arrange | positioned under the 1st hoist rail 19 extended in linear form, for example.
This makes it possible to easily place the sker fur crater unit transported from the stacking field on the disassembly table 11 and simultaneously disassemble a plurality of scar fur crater units.

The second hoist mechanism 14 is attached to the ceiling, and, for example, from the first hoist rail 19, a branch portion 21 that branches vertically, and gradually bends from the branch portion 21 to be parallel to the first hoist rail 19. It has the 2nd hoist rail 23 which has the linear part 22 extended, and the 2nd hoist main body 24 which raises / lowers the structural member 31 which ran on the 2nd hoist rail 23 and was latched. A work table 13, a set table 16, a drying tank 18, and a processing tank 17 are provided side by side toward the end of the straight part 22 below the straight part 22 of the second hoist rail 23.

By adopting such a configuration, the component member 31 that is primarily stored on the work table 13 is lifted by the second hoist body 24 and moved to above the mounting table 15 supported by the set table 16. 31 can be lowered and sequentially loaded on the mounting table 15. Then, the mounting table 15 that has been loaded is lifted by the second hoist body 24 and moved to above the processing tank 17, and the mounting table 15 is lowered and immersed in the processing tank 17 to remove the iron-based oxide. be able to.
In addition, after removing the iron-based oxide, the mounting table 15 is lifted by the second hoist body 24 and moved to above the drying tank 18, and the mounting table 15 is lowered and inserted into the drying tank 18. The treatment agent adhering to the surface can be removed and dried. Furthermore, after the drying is completed, the mounting table 15 can be lifted and moved to the set table 16 to hold the mounting table 15 with the set table 16, and the components 31 loaded on the mounting table 15 are sequentially placed on the work table 13. Can be changed.

As shown in FIGS. 2 and 3, the mounting table 15 includes a cylindrical body 25 having a truncated cone shape, for example, and a plurality (eight in this case) of support members 26 extending radially outward at the lower portion of the cylindrical body 25. In addition, a plurality of strip plate members 27 to 30 are provided concentrically by providing a gap on the outer side of the cylindrical body 25 and intersecting with the support members 26. In addition, the width | variety of the strip plate members 27-29 is substantially the same width, and the width | variety of the strip plate member 30 provided in the outermost side is larger than the other strip plate members 27-29. Here, the cylinder 25, the support member 26, and the strip plate members 27 to 30 can be made of, for example, iron.
As a result, the component member 31 can be loaded on the upper end side of the band plate members 27 to 29, and a treatment agent that is an example of a fluid can freely pass through the gap between the band plate members 27 to 30. Since the upper end of the band plate member 30 protrudes from the upper ends of the band plate members 27 to 29, it is possible to prevent the stacked component member 31 from moving and dropping off on the upper end side of the band plate members 27 to 29.

In addition, the mounting table 15 is provided with a plurality of (eight in this case) mounting members 32 protruding outward in the radial direction at the upper portion of the cylindrical body 25 at equal intervals in the circumferential direction. Is attached with a fall-preventing member 33 having a V-shape in plan view that opens radially outward. Here, a gap is formed between the adjacent fall prevention members 33, and the components 31 are inserted into the gap when the component members 31 are stacked.
Thereby, when the component member 31 is loaded on the band plate members 27 to 29, it is possible to prevent the component member 31 from falling due to the support of the collapse preventing member 33.

Furthermore, the mounting table 15 includes a support member 35 provided inside the cylinder body 25 via a connecting member 34, and a latching portion 36 is provided on the support member 35. The mounting table 15 can be moved up and down by being hooked on the second hoist body 24 via the hooking portion 36.
Here, in order to reduce the weight and improve the rigidity, the support member 35 has, for example, a bottomed cylindrical shape with a closed upper end, and a plurality of through holes 37 are provided in the upper end portion. By providing the through hole 37, the air present inside the support member 35 can be released when the mounting table 15 is immersed in the processing tank 17.
In addition, it is preferable that the clearance gap formed between the adjacent fall prevention members 33 is adjusted beforehand according to the dimension of the structural member 31 to stack. As a result, the constituent members 31 can be evenly loaded around the cylindrical body 25, and the mounting table 15 can be moved up and down stably by the second hoist mechanism 14.

As shown in FIG. 4, the treatment tank 17 is provided in a treatment tank main body 38 that stores a treatment agent that does not substantially dissolve copper or a copper alloy but dissolves an iron-based oxide, and a bottom 39 of the treatment tank main body 38. The holding table 41 includes a mounting unit 40 on which the mounted mounting table 15 is placed, and a plurality of ultrasonic vibrators 42 disposed inside the holding table 41.
Here, the mounting unit 40 is, for example, an empty steel plate in which holes having an inner diameter of 25 to 40 mm are continuously arranged at intervals of 10 mm or less, or a mesh interval is 3 so that the processing agent can freely pass therethrough. It is formed using a net iron plate of ˜5 mm. Moreover, the frequency of the ultrasonic vibration transmitted from the ultrasonic vibrator 42 is 25 kHz or more and 40 kHz or less, preferably 25 kHz or more and 30 kHz or less. The ultrasonic vibrator 42 is provided by adjusting the ultrasonic vibration output and the radix so that energy of 4 to 10 W / liter is supplied per unit volume of the processing agent.
By adopting such a configuration, the mounting table 15 is placed on the holding table 41 and the ultrasonic vibrator 42 is driven to generate cavitation in the treatment agent. The surface layer portion of the iron-based oxide that is welded or fixed can be divided into fine regions and dropped into the treatment agent.

In addition, the processing tank 17 includes a discharge pipe 44 having one end connected to a discharge port 43 provided at a lower portion of the processing tank main body 38, a filter unit 45 provided on the downstream side of the discharge pipe 44, and other than the discharge pipe 44. A circulation pump 46 connected to the end side, and a supply pipe 48 connected to a discharge port of the circulation pump 46 at one end and connected to a supply port 47 provided at the upper end of the processing tank main body 38 at the other end. Furthermore, a heater 47 a for heating the processing agent stored in the processing tank 17 is provided around the processing tank main body 38.
By adopting such a configuration, the processing agent is circulated by operating the circulation pump 46, whereby fine particles of the iron-based oxide mixed in the processing agent can be removed by the filter unit 45, and the processing tank The processing agent in the main body 38 can always be kept clean. Moreover, the temperature of a processing agent can be managed in the range of 10-40 degreeC, for example by the heater 47a, and the stable removal of an iron-type oxide can be performed also in the winter where temperature is low.

As shown in FIG. 5, the drying tank 18 is loaded on the mounting table 15, a drying tank body 50 having a lid 49, a rotary table 51 that is provided at the bottom of the drying tank body 50 and places the mounting table 15. A cleaning agent injector 52 that injects water or water vapor, which is an example of a cleaning agent that cleans the processing agent adhering to the surface of the component member 31, is provided.
Here, the rotary table 51 includes a table main body 53 that holds the mounting table 15 horizontally, a rotary shaft 54 provided at the center of the lower surface of the table main body 53, and a speed reducer that applies a rotational driving force to the rotary shaft 54. The electric motor 55 is provided.

The cleaning agent injector 52 is provided on the bottom side of the drying tank main body 50, and a bottom injection unit 57 that injects water or water vapor from a plurality of injection ports 56 from below to the mounting table 15 loaded on the rotary table 51; A side injection unit 58 for injecting water or water vapor from a plurality of injection ports 56 from the lateral direction to the mounting table 15 provided on the side of the drying vessel main body 50 and loaded on the rotary table 51, and a lid for the drying vessel main body 50 The lid 49 is provided with a lid spray section 58 a that sprays water or water vapor from a plurality of spray ports 56 from above on the mounting table 15 provided in the section 49 and loaded on the rotary table 51.
The bottom injection unit 57, the side injection unit 58, and the lid injection unit 58 a are connected by a cleaning agent supply pipe 59, and the upstream side of the cleaning agent supply pipe 59 is connected to a water supply pipe 62 and water vapor via valves 60 and 61. Supply pipes 63 are connected to each other.

With this configuration, it is possible to rotate the table 15 mounted on the table body 53 by driving the electric motor 55 to rotate the table body 53. Then, by closing the valve 61 and opening the valve 60, water supplied from the water supply pipe 62 is loaded on the mounting table 15 from the outlets 56 of the bottom injection unit 57, the side injection unit 58, and the lid injection unit 58 a. Then, the treating agent can be washed away by spraying the component member 31 rotating together.
Next, the valve 60 is closed and the valve 61 is opened, whereby the water vapor supplied from the water vapor supply pipe 63 is rotated from the respective jet outlets 56 of the bottom injection part 57, the side injection part 58, and the lid injection part 58a. While rinsing by spraying on the member 31, the temperature of the component 31 can be raised and drying can be performed. In addition, the water and water vapor | steam used for washing | cleaning are discharged | emitted from the discharge port 64 provided in the bottom part of the drying tank main body 50. FIG.

Next, a method for removing the iron-based oxide from the constituent member 31 of the kerfur crater unit according to the embodiment of the present invention will be described.
First, the used skater crater unit collected in the collection field is hung on the first hoist body 20 of the first hoist mechanism 12 and lifted, and the first hoist body 20 is placed on the first hoist rail 19. To stop at a position above the disassembly table 11. Next, the first hoist body 20 is operated to place the used skater crater unit on the disassembly base 11 and release the latch. Then, the used skater crater unit placed on the disassembly table 11 is disassembled into the constituent members 31.
When the disassembly is completed, each component member 31 is hooked and lifted on the second hoist body 24 of the second hoist mechanism 14, and the second hoist body 24 is moved on the second hoist rail 23 to move the work table 13. Stop at a position above. Then, the second hoist body 24 is operated to place the constituent member 31 on the work table 13 for primary storage.

The mounting table 15 is lifted by the second hoist body 24 through the latching portion 36, moved on the second hoist rail 23 to the upper side of the set table 16, lowered, and placed on the set table 16. Then, the constituent member 31 that is primarily stored on the work table 13 is lifted by the second hoist body 24 and moved to above the mounting table 15, and the gap is formed between the adjacent fall prevention members 33. The component member 31 is lowered and loaded on the mounting table 15 so that the member 31 is inserted.

When the loading of the component 31 on the mounting table 15 is completed, the mounting table 15 is lifted by the second hoist body 24 via the latching portion 36, and the second hoist body 24 is moved on the second hoist rail 23. And stop at a position above the treatment tank 17. Then, the mounting table 15 is lowered by operating the second hoist body 24 and immersed in the processing agent stored in the processing tank 17.
Here, in the treatment agent, ammonium thioglycolate is contained in an amount of 10 wt% to 25 wt%, preferably 14 wt% to 25 wt%, more preferably 17 wt% to 25 wt%. Adjust as follows. Further, the heater 47a is operated to adjust the liquid temperature of the processing agent to a range of 10 to 40 ° C, preferably 15 to 30 ° C.

Next, the ultrasonic vibrator 42 is driven for 30 to 100 minutes, preferably 50 to 70 minutes, to generate cavitation in the treatment agent. Thereby, the surface layer portion of the iron-based oxide is gradually divided into fine regions and dropped into the processing agent, and the iron-based oxide can be removed from the component member 31.
If the removal of the iron-based oxide is continued, the fine particles of the iron-based oxide increase in the treatment agent. Therefore, the treatment agent is passed through the filter unit 45 by operating the circulation pump 46. The fine particles of the iron-based oxide mixed in the treatment agent are removed by the filter unit 45.

When the removal of the iron-based oxide from the constituent member 31 is completed, the mounting table 15 is pulled up from the processing tank body 38 by the second hoist body 24 via the latching portion 36, and the second hoist body 24 is moved to the second hoist body 24. It moves to the upper position of the drying tank main body 50 which removed the cover part 49 on the hoist rail 23, and stops. And the 2nd hoist main body 24 is operated, the mounting base 15 is mounted on the rotary table 51 in the drying tank main body 50, and latching is cancelled | released.
Next, the lid 49 is attached to the drying tank main body 50, the electric motor 55 is driven, and the rotary table 51 is rotated at a rotational speed of, for example, 20 to 30 times / minute, and the mounting table 15 placed thereon is mounted. Rotate.

Subsequently, by closing the valve 61 and opening the valve 60, water supplied from the water supply pipe 62 is injected into each of the bottom injection part 57, the side injection part 58, and the lid injection part 58a through the cleaning agent supply pipe 59. The fuel is ejected from the outlet 56 and discharged from the discharge port 62. Thereby, water can be sprayed from the periphery to the rotating mounting table 15, and water can be uniformly applied to the constituent members 31 loaded on the mounting table 15. For this reason, the processing agent adhering to each component 31 can be washed away efficiently.
Here, the pressure of water jetted from the jet outlet 56 is 1 to ² kg / cm ² , preferably 1.5 to ² kg / cm ² , and the amount of water is 1.0 to 3.0 liters / minute, preferably 2.5. ˜2.8 liters / minute, water temperature is 15 to 30 ° C., preferably 20 to 25 ° C., and spraying time is 3 to 8 minutes, preferably 4 to 6 minutes.

When the cleaning of the processing agent adhering to each component 31 is completed, the valve 60 is closed and the valve 61 is opened, so that the water vapor supplied from the water vapor supply pipe 63 is supplied to the bottom injection section via the cleaning agent supply pipe 59. 57, each side injection part 58, and each jet outlet 56 of the lid | cover injection part 58a inject. Accordingly, water vapor can be uniformly applied to the constituent members 31 loaded on the rotating mounting table 15, and each constituent member 31 after washing with water is rinsed with water vapor and the constituent members 31. Gradually raise the temperature of and dry. The water produced by the condensation of water vapor is discharged from the discharge port 64.
Here, the pressure of water vapor ejected from the ejection port 56 is 1 to ² kg / cm ² , preferably 1.5 to ² kg / cm ² , and the amount of water vapor is 1.0 to 3.0 liters / minute, preferably 2. It is 5 to 2.8 liters / minute, the water vapor temperature is 150 to 230 ° C., preferably 180 to 200 ° C., and the injection time is 10 to 20 minutes, preferably 13 to 18 minutes.

When the drying of each component 31 is completed, the electric motor 55 is stopped and the rotary table 51 is stopped. And the cover part 49 is removed from the drying tank main body 50, the mounting base 15 is pulled up from the drying tank main body 50 by the 2nd hoist main body 24 via the latching | locking part 36, and the 2nd hoist main body 24 is made into a 2nd hoist rail. 23, it moves to the upper position of the set table 16 and stops.
Next, the second hoist body 24 is operated to place the mounting table 15 on the set table 16 and release the latch from the second hoist body 24.
Subsequently, the constituent members 31 mounted on the mounting table 15 are sequentially lifted by the second hoist body 24, moved on the second hoist rail 23 to above the work table 13, and lowered to the work table 13. Place and store temporarily.
When the scar fur crater unit is reused, each component 31 that is primarily stored on the work table 13 is carried to the disassembly table 11 using the second hoist mechanism 14, and the scat fur crater unit is assembled and ignited. After the test is performed, the first hoist mechanism 12 is used to transport the test to the collection field.

As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment, The change in the range which does not change the summary of invention is possible, Each above-mentioned embodiment is possible. also included in the scope of the present invention when configuring a process for removing iron-based oxide from components of Scar fur crater unit of the present invention in combination a part or all of the embodiments and modifications.

It is explanatory drawing of the oxide removal equipment to which the method of removing an iron-type oxide from the structural member of the skater crater unit which concerns on one embodiment of this invention is applied . It is a partial notch front sectional drawing of the mounting base which mounts a structural member in the removal method. It is a top view of the mounting base which mounts a structural member in the removal method. It is explanatory drawing of the immersion tank in which the mounting base which stored the processing agent and mounted the structural member in the removal method is immersed. It is explanatory drawing of the washing tank which accommodates the mounting base which mounted the structural member in the removal method, and wash | cleans a structural member.

10: Oxide removal equipment, 11: decomposition table, 12: first hoist mechanism, 13: work table, 14: second hoist mechanism, 15: mounting table, 16: set table, 17: treatment tank, 18: Drying tank, 19: first hoist rail, 20: first hoist body, 21: branching part, 22: straight part, 23: second hoist rail, 24: second hoist body, 25: cylinder 26: support member, 27-30: strip member, 31: component member, 32: attachment member, 33: fall prevention member, 34: connecting member, 35: support member, 36: latching portion, 37: through hole, 38: Treatment tank body, 39: Bottom, 40: Placement part, 41: Holding table, 42: Ultrasonic vibrator, 43: Discharge port, 44: Discharge piping, 45: Filter part, 46: Circulation pump, 47: Supply port, 47a: heater, 48: supply piping, 49: lid 50: Drying tank main body, 51: Rotary table, 52: Cleaning agent injector, 53: Table main body, 54: Rotating shaft, 55: Electric motor, 56: Injection port, 57: Bottom injection unit, 58: Side injection unit, 58a: lid injection unit, 59: cleaning agent supply pipe, 60, 61: valve, 62: water supply pipe, 63: water vapor supply pipe, 64: discharge port

Claims (4)

In the method of removing iron-based oxides welded or fixed to the surface of a copper-based substrate consisting of constituent members of a skater crater unit that constitutes a tip portion of a device for supplying a flame for cutting a surface portion of a steel piece ,
A step of disassembling the kerffer crater unit, on which the iron-based oxide is welded or fixed on the surface, on a disassembly base,
Loading the disassembled component on a mounting table through which fluid can pass; and
The mounting table on which the constituent members are placed is immersed in a processing tank in which a processing agent containing 10% by weight or more and 25% by weight or less of ammonium thioglycolate is stored, and is provided at the bottom of the processing tank. Placing on the mounting part of the holding table,
By operating an ultrasonic vibrator arranged inside the holding table, fine cracks are generated in the iron-based oxide that is welded or fixed to the constituent members and dropped into the treatment agent, and the treatment is performed. Circulating the treatment agent in the tank through a filter unit and a circulation pump for removing the iron-based oxide mixed in the treatment agent;
After the removal of the iron-based oxide is completed, the step of pulling up the mounting table on which the constituent members are placed from the processing tank and placing it on a rotary table provided at the bottom of the drying tank body;
The treatment agent is attached by attaching a lid of the dryer main body, rotating the rotary table, rotating the mounting table placed on the rotating table, and applying water to the constituent members loaded on the mounting table. Washing off,
After washing the treatment agent, applying water vapor to the rotating mounting table, rinsing the component member washed with water, and raising the temperature of the component member to dry the component member A method for removing iron-based oxides from a constituent member of a skater crater unit . A method of removing iron oxide from a component of Scar fur crater unit according to claim 1, wherein the water to wash away the processing agent, with water vapor to perform rinsing and drying of the constituent members, of the drying tank body It is injected toward the mounting table mounted on the rotary table via the bottom injection unit provided on the bottom side, the side injection unit provided on the side, and the lid injection unit provided on the lid. A method for removing iron-based oxides from a constituent member of a skater crater unit . A method of removing iron oxide from a component of Scar fur crater unit according to any one of claims 1 and 2, wherein the frequency of the ultrasonic vibrations is characterized by at 40kHz or less than 25kHz A method for removing iron-based oxides from the constituent members of a skater crater unit . A method of removing claim 1 iron oxides from components of Scar fur crater unit according to the processing tank, a heater to maintain the temperature of the treatment agent in the range of 10 to 40 ° C. is provided A method for removing iron-based oxides from a constituent member of a skater crater unit .

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