JP2000328274A - Method for storing metallic product and storing house therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for storing metallic products capable of storing the metallic products without generating rust, etc., over a long period as it is unpacked, and also provide a storing warehouse therefor. SOLUTION: This method for storing metallic products comprises forming a forcible air stream in the storing warehouse and storing the metallic products in the warehouse having the forcible air stream therein. The warehouse 1 for the metallic products is provided with a fan 2 which generates the forcible air stream in the warehouse 1 and a device for adding a volatile rust preserving agent which makes the air stream formed by the fan 2 include the volatile rust preventive agent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a warehouse for storing metal products which can be stored for a long period of time without generating rust or the like without packaging.

[0002]

2. Description of the Related Art In an ironworks, metal products such as a plating plate and a strip steel coil are usually temporarily stored in a storage warehouse after production until shipment, and during storage, condensation occurs due to condensation. In order to prevent the generation of rust, rust preventive oil is applied to the product surface, or the entire product is wrapped with an airtight resin film. However, from the standpoint of environmental protection in recent years, there has been a growing need to remove rust-preventive coatings and omit packaging materials that become waste, without applying rust-preventive oil or packaging products with resin films. There has been a desire for a way to store products naked.

However, when metal products are stored in a non-packaged state, it is unavoidable to generate rust due to dew condensation during storage. To prevent this, large-scale air conditioning of the entire warehouse is required. Therefore, it is impractical to keep a large warehouse that is frequently loaded and unloaded at a constant condition by air conditioning, and there is a problem that it is difficult in terms of cost.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and does not apply a rust-preventive oil to the product surface, and also forms dew condensation on the metal product without packaging. It has been completed for the purpose of providing a metal product storage method and a metal product storage warehouse that can be stored for a long period of time without generating rust or the like due to the above.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention forms a forced air flow in a warehouse, and stores a metal product in the warehouse having the forced air flow. A method for storing metal products, characterized by storing
It is characterized by comprising a fan for generating a forced air flow in the warehouse, and a vaporizing rust inhibitor adding device for containing the vaporizing rust inhibitor in the air flow formed by the fan. And a storage warehouse for metal products. In the above-described method for storing metal products, it is preferable that the forced air flow is set to 0.1 to 1.0 m / s, and the dew point of the air flow is set to be 2 degrees lower than the temperature of the metal products. It is preferable to keep the temperature lower than ℃,
It is preferable to include a vaporizable rust inhibitor in the flow of air.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. The drawings show a case where metal products such as a plating original plate and a strip steel coil manufactured in an ironworks are temporarily stocked in a storage warehouse until shipment. In the figure, reference numeral 1 denotes a warehouse, and 10 denotes a metal product. And
In the present invention, when storing the metal products 10 in the warehouse 1, there is a characteristic configuration in which a forced air flow is formed in the warehouse 1. That is, according to the present invention, when there is an air flow in the warehouse 1, the stagnation of the air disappears, the difference in temperature distribution in the space of the warehouse 1 is reduced, and the generation of rust due to dew condensation can be accurately prevented. It has been completed based on the finding that products can be stored for a long period of time without packaging. Note that long-term storage in the present invention means storage for at least half a year or more.

The forced air flow preferably has a flow rate of 0.1 to 1.0 m / s in the vertical section of the warehouse 1. The reason is that it is difficult to completely eliminate the stagnation of the air in the space of the warehouse 1 with an air flow of less than 0.1 m / s, so that it is difficult to obtain a uniform temperature distribution difference. If the speed is higher than 1.0 m / s, a special circulating device or the like is required, which is inferior in economy. Because of forced air flow, natural convection (0.05m /
Needless to say, about s) is excluded.

[0008] Dew condensation occurs when the atmosphere touches an object whose temperature is lower than its own dew point. Conventionally, in order to prevent dew condensation, the temperature of the atmosphere in the warehouse must be reduced to 5 to 1 on average.
In the present invention, the dew point temperature of the air flow may be maintained at least 2 ° C. lower than the temperature of the metal product, so that the temperature control is economical and extremely low. It will be easier.

Further, by including a vaporizable rust preventive in the forced flow of air, a further rust preventive effect can be exhibited. In this case, in the conventional warehouse, it was not economical because it was necessary to maintain a high concentration in order to spread the vaporizable rust preventive agent throughout, but in the present invention, it is required to take every corner by riding the forced air flow. 1 ppm
Sufficient rust-preventing effect can be obtained at a low concentration, and there is no economical problem. The volatile rust preventives include cyclohexylamine carbonate (CHC) and dicyclohexylammonium nitrite (DIPA).
N).

In order to form a forced air flow as described above, a fan 2 is installed in the warehouse 1. For example, as shown in FIG. 1, the fans 2 are arranged at regular intervals of about 20 to 30 m in the longitudinal direction of the warehouse ceiling,
It is configured to form a uniform flow in the range of 0.1 to 1.0 m / s in the vertical sectional direction of the warehouse 1. In FIG. 1, a dehumidifier 3 is provided in addition to the fan 2. The dehumidifier 3 is connected to a dehumidification controller 5 that operates in response to a signal from the product temperature sensor 4 and is controlled by the dehumidification controller 5 so that the dew point of the air flow can be maintained at least 2 ° C. lower than the temperature of the metal product. It is configured.

In the apparatus shown in FIG. 2, an addition device 6 for a vaporizable rust inhibitor is provided together with the fan 2. The addition device 6 is connected to a vaporization rust inhibitor addition controller 8 which operates upon receiving a signal from the concentration check sensor 7, and is controlled by the addition controller 8 to constantly vaporize 1 ppm or more in the air flow. It is configured to contain a rust preventive.

FIG. 3 shows a dehumidifier 3 together with the fan 2 and an apparatus 6 for adding a vaporizable rust inhibitor.
Is controlled by the dehumidification controller 5 and the addition controller 8, so that the dew point of the air flow is kept at least 2 ° C. lower than the temperature of the metal product, and the vaporization of air is always 1 ppm or more in the air flow. It is configured to contain a rust inhibitor.

[0013]

(Embodiment 1) As shown in FIG.
A block of 1500 sheets of 1m × 1m × 0.2mm plating original sheets was stacked in a warehouse of 30m × 50m to form a block, and several blocks were arranged. The warehouse 1 is provided with a fan 2 and a dehumidifier 3 for forming a forced air flow on the ceiling.
Is designed to control the dew point temperature of the air flow by the product temperature sensor 4 and the dehumidification controller 5. In the aforementioned warehouse, under the conditions shown in Table 1,
As a result of storing metal products until the month and testing for the presence of rust, if a forced air flow of 0.1 m / s or more was formed in the warehouse, no rust was generated after 6 months. It was confirmed that the composition had an excellent storage effect. On the other hand, as a comparative example, there is shown a case where a forced air flow was not formed in the warehouse. However, in each case, rust was generated and it could not be adopted as a non-packaged storage means.

(Embodiment 2) As shown in FIG.
A steel strip having a width of 1200 mm and a thickness of 0.8 mm and wound into a coil having a diameter of 1.5 m was stacked in two stages in a warehouse of mx 30 mx 100 m to form one block, and a plurality of blocks were arranged. The warehouse 1 is provided with a fan 2 for forming a forced air flow in the ceiling and an addition device 6 for a volatile anticorrosive agent. A predetermined concentration of a vaporizable rust inhibitor is contained in the flow of rust. In such a warehouse, under the conditions shown in Table 2, 1
As a result of storing metal products from October to March of the following year and testing for the presence of rust, if a forced air flow of 0.1 m / s or more was formed in the warehouse, even after 6 months, It was confirmed that no rust was generated and an excellent storage effect was obtained. On the other hand, as a comparative example, there is shown a case where a forced air flow was not formed in the warehouse. However, in each case, rust was generated and it could not be adopted as a non-packaged storage means.

(Embodiment 3) In a warehouse provided with a fan 2, a dehumidifier 3, and a vaporizing rust inhibitor adding device 6 for forming a forced air flow at the upper part of the side wall, the embodiment 2 is installed. The same metal products were stored. In such a warehouse, metal products were stored from March to August under the conditions shown in Table 3 and tested for the presence of rust.
If a forced air flow of m / s or more is formed, 6
Even after a lapse of months, it was confirmed that no rust was generated and an excellent storage effect was obtained. On the other hand, as a comparative example, there is shown a case where a forced air flow was not formed in the warehouse. However, in each case, rust was generated and it could not be adopted as a non-packaged storage means.

[0016]

[Table 1]

[0017]

[Table 2]

[0018]

[Table 3]

[0019]

As is apparent from the above description, according to the present invention, rust and the like due to dew condensation can be prevented without applying a rust-preventive oil to the surface of the product and without packaging the metal product. It can be stored for a long time without generating. It also has the advantages of reducing costs associated with rust-preventive oils and packaging materials, eliminating the associated work, and having the advantage that no waste is generated, so there is no problem of environmental pollution. It also has. Therefore, the present invention has an extremely large contribution to industrial development as a metal product storage method and storage warehouse that has eliminated the conventional problems.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing another embodiment.

FIG. 3 is a perspective view showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Warehouse 2 Fan 6 Addition device of volatile rust inhibitor 10 Metal products

Claims (5)

[Claims] Claims 1. A forced air flow is formed in a warehouse,
A method for storing metal products, comprising storing metal products in a warehouse having a forced air flow. 2. A forced air flow of 0.1 to 1.0 m /
The method for storing a metal product according to claim 1, wherein 3. The method for storing a metal product according to claim 1, wherein the dew point temperature of the air flow is kept at least 2 ° C. lower than the temperature of the metal product. 4. The method for storing a metal product according to claim 1, wherein a vaporizable rust inhibitor is contained in the flow of air. 5. A fan for generating a forced air flow in a warehouse, and an apparatus for adding a vaporizable rust inhibitor which contains a vaporizable rust inhibitor in the air flow formed by the fan. A storage warehouse for metal products that is equipped with: