JP5874598B2 - Anode casting mold and mother mold for producing anode casting mold - Google Patents

Description

  The present invention relates to an anode casting mold for casting a copper electrolysis anode and the like, and a matrix for producing the same.

In the copper smelting operation, an anode for copper electrolysis produced with a copper grade of about 98% is finished into copper with a copper grade of about 99.99% in the electrolysis process. As shown in FIGS. 1 and 2, the shape of the copper electrolysis anode 10 is generally a rectangular shape having a width W ₀ = about 1055 mm and a height H ₀ = about 1090 mm. The anode body 11 and the hanging ears 12 (12A, 12B) projecting upward and both sides from the anode body 11 are formed. Moreover, the thickness of the hanging ear 12 (12A, 12B) is about T ₁ (T _1A , T _1B ) = 30 to 45 mm, and the thickness of the anode body 11 is about T ₀ = 35 to 50 mm. .

  FIG. 8 is a schematic view showing a general anode casting facility 50. In this anode casting facility 50, a plurality of anode casting molds 20 are placed on a turntable 51 which is a mold conveying facility, and the anode casting mold 20 is rotated while rotating the turntable 51 in a predetermined rotation direction R. Conveyed continuously, the molten copper 30 is cast into the anode casting mold 20 from the rod 52, and the molten copper 30 is solidified by the cooling device 53 to cast the copper electrolysis anode 10, and then the copper electrolysis anode 10 is peeled off. It is comprised so that it may strip off with the taker 54. For simplification, the number of anode casting molds 20 is five in FIG. 8, but the number of anode casting molds is usually about 20.

  Here, it is known that the shape of the copper electrolysis anode has a great influence on the stability of the operation of the electrolysis process. Specifically, the anode for copper electrolysis is required to have a smooth surface and a uniform thickness for each part.

  However, in the anode cast by the above equipment, the thickness of the left and right drooping ears 12A and 12B in FIG. 2 is inconsequential due to the deviation of molten copper due to the inertial force generated when the turntable is driven or stopped. There was a case where it became uniform. In general, the thickness of the ear portion formed on the opposite side of the traveling direction R is desired particularly because the molten copper is biased to the opposite side of the traveling direction R when the turntable 51 in FIG. 8 is driven. It often becomes thicker than the thickness.

  As a general countermeasure against non-uniformity of the shape of the anode, for example, in order to prevent the occurrence of so-called casting or the like formed by the outflow of the melt to the portion adjacent to the bottom of the anode body of the casting mold for anode casting There is disclosed a mold for providing a weir to stabilize the shape uniformity of the anode body (see Patent Document 1).

  Further, as a means for suppressing the occurrence of distortion of the casting mold for anode casting, an casting mold for anode casting in which streaky convex portions are provided in a grid pattern on the casting surface is also disclosed (see Patent Document 2).

  Conventionally, the anode taken out from the mold has been subjected to shape correction by press working or the like, but the thickness of the anode ear for the anode subjected to shape correction by press working is quickly determined in the pressing process. An anode manufacturing method is also disclosed in which an anode having an inappropriate thickness is detected as a defective product with high accuracy (see Patent Document 3).

JP 2001-96354 A Japanese Patent Laid-Open No. 2003-211264 JP 2000-96280 A

  According to the casting mold for anode casting described in Patent Documents 1 and 2, for example, the shape uniformity of the anode main body can be mainly improved. However, in particular, there has not yet been a means for effectively correcting the uneven thickness of the hanging ears resulting from the casting method itself.

  Therefore, in the method described in Patent Document 3, a method has been proposed in which an anode having a drooping ear with an inappropriate thickness is excluded as a defective product. However, it would be more desirable if the thickness uniformity of the drooping ears could be sufficiently increased at the casting stage to reduce the occurrence of defective products, and that would greatly improve the productivity of the anode. Can do. There has been a demand for means capable of sufficiently increasing the uniformity of the thickness of the hanging ear portion of the anode during casting.

  The present invention relates to an anode casting mold capable of sufficiently reducing the thickness unevenness of the drooping ear portion of the anode by using it for manufacturing a node such as an anode for copper electrolysis, and such a mold. An object is to provide a matrix for manufacturing.

  In the casting mold for anode casting, the present inventors have conventionally determined the inclination angle of the intermediate concave portion, which is an inclined surface formed between the main body concave portion corresponding to the anode main body and the ear concave portion corresponding to the hanging ear portion. It has been found that by making it larger than this, it is possible to sufficiently reduce the uneven thickness of the left and right of the hanging drooping ear portion of the anode, and the present invention has been completed. Specifically, the present invention provides the following.

  (1) A mold for casting an anode for electrolysis having a pair of drooping ears on both sides of the top of the anode main body, a main body recess corresponding to the anode main body, and an ear corresponding to the drooping ear The intermediate recess having a recess, and an intermediate recess that is an inclined surface formed between the main body recess and the ear recess according to a difference in depth between the main body recess and the ear recess. An anode casting mold having an inclination angle of 3.0 ° to 5.2 °.

  (2) A mother die for producing the anode casting mold according to (1), wherein a main body corresponding to the main body recess, an ear corresponding to the ear recess, the main body, and the According to the difference in thickness with the ear portion, the intermediate portion is an intermediate portion that is an inclined surface formed between the main body portion and the ear portion, and the inclination angle of the intermediate portion is 3.0 ° or more and 5 A matrix that is 2 ° or less.

  (3) A method for producing an anode for copper electrolysis, comprising a casting step using the anode casting mold according to (1).

  According to the present invention, for example, an anode casting mold capable of sufficiently reducing non-uniformity of the thickness of the hanging portion of the anode by using it for manufacturing a node such as an anode for copper electrolysis, and the like. It is possible to provide a mother mold for manufacturing a simple mold for casting an anode.

It is a top view of the copper electrolysis anode which can be manufactured using the casting mold for anode casting of the present invention. It is a side view in the case of seeing from the A direction in FIG. 1 of the copper electrolytic anode which can be manufactured using the casting mold for anode casting of the present invention. It is a perspective view of the casting mold for anode casting of the present invention. It is sectional drawing in the state after the pouring of the casting mold for anode casting of this invention. It is an expanded sectional view of the intermediate | middle recessed part of the casting mold for anode castings of this invention. It is sectional drawing of the mother die of the casting mold for anode casting of this invention. It is an expanded sectional view of the intermediate part of the mother die of the anode casting mold of the present invention. It is the schematic which shows the anode casting installation which can use the casting mold for anode casting of this invention preferably.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 and 2 are diagrams showing a copper electrolytic anode that can be manufactured using the anode casting mold of the present invention (hereinafter also simply referred to as “mold”). 3 to 5 are diagrams showing a mold according to an embodiment of the present invention, in which FIG. 3 is a perspective view of the mold, FIG. 4 is a cross-sectional view of the mold after pouring, and FIG. It is an expanded sectional view of an intermediate crevice.

  FIGS. 6 to 7 are views showing a mother die (hereinafter also simply referred to as “mother die”) for producing the anode casting mold according to the embodiment of the present invention. FIG. 6 is a cross-sectional view of the mother die. FIG. 7 is an enlarged cross-sectional view of an intermediate part of the mother die.

<Anode for copper electrolysis>
As shown in FIG. 1, the copper electrolysis anode 10 has an anode body 11 immersed in an electrolytic solution in a copper electrolysis process, and a pair of drooping ears 12 for hanging the anode body 11 in an electrolytic cell.

  In the conventional anode, the uneven thickness of the left and right drooping ears derived from the casting method is problematic in that it causes troubles in the subsequent anode pressing process and ear breakage during transportation. It was.

  The copper electrolysis anode 10 cast using the anode casting mold 20 of the present invention is characterized in that the thickness non-uniformity of the drooping ear 12 is sufficiently reduced, and can solve the above problems. It has become a thing.

<Anode casting mold>
As shown in FIGS. 3 to 5, the anode casting mold 20 according to the embodiment of the present invention corresponds to the shape of the body recess 21 corresponding to the shape of the anode body 11 (see FIG. 1) and the shape of the hanging ear 12. The ear | edge part recessed part 22 to be formed is formed. Then, the depth D ₁ of the ears recess 22, in accordance with the difference between the depth D ₂ of the main body recess 21, is formed by concatenating between the ends of the end portion and the ear portion recess 22 of the main body recess 21 And an intermediate recess 23 that is an inclined surface.

As shown in FIG. 5, in the casting mold 20 for anode casting, the inclination angle θ ₁ of the surface of the intermediate recess 23 when the bottom surface of the main body recess 21 is a horizontal plane (0 °) is 3.0 ° or more and 5.2 ° or less. It is characterized by being. The inclination angle θ ₁ is more preferably 4.0 ° to 5.0 °.

In the conventional casting mold for anode casting, the inclination angle θ ₁ has not been particularly noticed. In such a conventional anode casting mold, when the inertia force due to the rotation of the turntable is applied to the molten copper 30 poured in the anode casting mold 20, one of the ear recesses is formed. Although there are cases where deviation of the molten copper 30 to 22 is induced, for consideration for the inclination angle of the surface of the intermediate recess 23 is not made at all, the inclination angle theta ₁ small, suppress this deviation I couldn't.

The anode casting mold 20 of the present invention, as shown in FIG. 5, is made larger than the conventional gradient of the slope of the inclination angle theta ₁ as 3.0 ° or more. Thereby, even when the inertial force due to the rotation of the turntable is applied to the molten copper 30 poured into the casting mold 20 for anode casting, the molten copper 30 to the one ear recess 22 as described above can be obtained. The bias can be suppressed. Therefore, the thickness non-uniformity between the left and right hanging ears 12A and 12B of the copper electrolysis anode 10 manufactured using the anode casting mold 20 can be sufficiently reduced.

<Matrix for producing casting mold for anode casting>
As shown in FIGS. 6 to 7, the mother die 40 according to the embodiment of the present invention has a complementary surface of the anode casting mold 20, a main body portion 41 corresponding to the shape of the anode main body 11, and a hanging ear. It has an ear part 42 corresponding to the shape of the part 12. And the inclined surface formed by connecting the end of the main body 41 and the end of the ear 42 according to the difference between the thickness T ₁₁ of the ear 42 and the thickness T ₀₀ of the main body 41. And an intermediate portion 43.

  Note that, as described above, the mother die 40 has a complementary surface of the anode casting mold 20, and the melt is poured in a state in which the mother die 40 is placed on the mold 44. The anode casting mold 20 can be manufactured by removing the mold 44 and the mother mold 40.

As shown in FIG. 7, in the mother die 40, the inclination angle θ ₁₁ of the surface of the intermediate portion 43 when the bottom surface of the main body portion 41 is a horizontal plane (0 °) is 3.0 ° or more and 5.2 ° or less. It is characterized by. Further, the tilt angle theta ₁₁ is more preferably 4.0 ° or more 5.0 ° or less. The inclination angle theta ₁₁ in the above range, the anode casting mold 20 can be stably above shape, thereby, right of the copper electrolysis anode 10 manufactured using the anode casting mold 20 The thickness non-uniformity of the hanging ears 12A and 12B can be sufficiently reduced.

  EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further more concretely, this invention is not limited to a following example.

(Example)
In a casting facility having the same configuration as that shown in FIG. 8, the anode casting mold 20 described above was installed to manufacture the anode. The inclination angle theta ₁ intermediate recesses of the mold was set to 4.5 °.
(Comparative example)
For comparative example, except that the inclination angle theta ₁ of the above and 2.7 ° was subjected to production of the anode in Example under the same conditions.

  For the examples and comparative examples, the thickness of the left and right hanging ears of the cast anode was measured. The obtained results are shown in Table 1 below. The traveling direction refers to the R direction in FIG. 8, that is, the rotation direction of the turntable 51. In addition, 40 anodes were manufactured for each of the examples and comparative examples, and the thicknesses of the left and right ears were measured.

  From Table 1, in the example using the anode casting mold of the present invention, compared with the case of using the conventional mold, the thickness of the hanging ear portion is uneven in the right and left, particularly on the opposite side in the traveling direction. It can be seen that the variation in the thickness is greatly suppressed.

  As described above, according to the present invention, an anode casting mold capable of sufficiently reducing non-uniformity and variation in the thickness of the hanging ear in the manufacture of an anode for copper electrolysis, and such a mold It can be seen that a matrix for manufacturing can be provided.

DESCRIPTION OF SYMBOLS 10 Copper electrolysis anode 11 Anode main body 12 Drooping ear part 20 Anode casting mold 21 Main body recessed part 22 Ear part recessed part 23 Intermediate recessed part 30 Molten copper 40 Master mold 41 Main body part 42 Ear part 43 Intermediate part 50 Anode casting equipment 51 Turntable 52 樋 53 Cooling device 54 Stripper

Claims (4)

An electrolysis anode casting facility for casting an electrolysis anode having a pair of drooping ears on both sides of the top of the anode body, the thickness of which is smaller than that of the anode body ,
A plurality of anode casting molds for casting molten copper are placed on a turntable rotatable in a predetermined rotation direction,
The anode casting mold includes a body recess corresponding to the anode body, an ear recess corresponding to the hanging ear, and a difference in depth between the body recess and the ear recess. An intermediate recess that is an inclined surface formed between the recess and the ear recess,
A casting facility for an anode for electrolysis , wherein an inclination angle of the intermediate recess is 3.0 ° or more and 5.2 ° or less . The anode casting apparatus for electrolysis according to claim 1, wherein the inclination angle of the intermediate recess is 4.5 ° or more. The anode casting facility for electrolysis according to claim 1 or 2, wherein the inclination angle of the intermediate recess is 4.5 °. The manufacturing method of the anode for electrolysis using the casting equipment of the anode for electrolysis in any one of Claim 1 to 3 .

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