JP2000239883A - Method for recycling anode returning material for casting, and the like, in copper refining, and charging device of anode returning material for casting, and the like, into refining furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method, with which production of electrolytic copper can be continues with a small storing quantity of an anode even in the case of stopping the operation due to a periodical checking of a smelting furnace such as a flash smelting furnace and to provide a charging device into a refining furnace to be executed in such a method. SOLUTION: In a copper refining method, in which an anode plate obtained by refining and casting crude copper obtd. by blowing a matte in a converter, is electrolytically refined to obtain the electrolytic copper, the anode returning material for casting, or the like, is melted in the refining furnace 5 and, after regenerating it as the anode, this regenerated anode is again supplied to the electrolytic refining. The charging device for charging the anode returning material for casting into the refining furnace 5 is constituted of a platform device 12 having a deck part 12b projectingly arranged toward a charging hole 5a at a height position of the charging hole 5a and a push mechanism 18 pushing out the anode returning material for casting from a returning port for casting laid on the deck part 12b and dropping the material into the refining furnace 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recycling anode cast material and the like in a copper smelting process and a charging apparatus for purifying anode cast material and the like.

[0002]

2. Description of the Related Art Copper is generally divided into a smelting process for producing a mat from copper concentrate, a wrought copper process for obtaining blister copper from a mat, a reduction purification process for removing impurities from blister copper, and an electrolytic refining process for purifying copper. Produced through. Specifically, first, ore as a raw material is mined from a mine, and the mined coarse ore is subjected to smelting as a high-grade copper concentrate by a beneficiation process.

In the smelting process, Fe in the copper concentrate is reduced and
SiO added as an agent₂To form a slag, and the copper
Concentrate as a sulfide melt mat. Mat smelting furnace
For example, blast furnaces, reverberatory furnaces, flash furnaces, electric furnaces, etc. are used.
Is done. Above all, it is less polluting the environment and energy
In Japan, flash furnaces are generally used as furnaces with low lugi consumption.
Have been. The slag is in the molten state in a large amount of water
Into fine granules and marketed as a raw material for cement, etc.
The exhaust gas is SO except for the reverberatory furnace.₂Waste heat due to high concentration
After removing the smoke ash with the boiler and cotrel,
Average SO ₂Sulfuric acid plant with a concentration of about 8-10%
Sent to Here, the mat means that some sulfides
An artificial homogeneous melt produced by melting in a furnace.
The lag is the gangue component in the charge to the furnace, Si
O₂, Al₂O₃Or the target metal (or
G) mainly impurities such as impurities
Are mixed and molten to form a uniform liquid.
U. Then, the obtained mat is sent to a converter.

[0004] In the wrought copper process in which the mat sent to the converter is oxidized to be blister copper, a fermentation period in which Fe is completely oxidized to remove it as slag, and bleaching copper produced by oxidizing the resulting white mold are obtained. It is divided into the copper making period. The converter operation is a batch type, and this slag generation period is repeated two to three times, and after the generated white glue reaches a certain amount, it enters the copper making period to obtain blister copper.
Incidentally, the Cu ₂ S phase in the mat is generally called white glue. The heat source uses the heat of oxidation of sulfides in both the fermentation and coppermaking periods, and does not use any fuel. In particular, since the heat of reaction becomes excessive during the copper making period, the temperature rise is increased by introducing cold cast materials such as anode recast material (electrolytic residue copper) generated during electrolytic refining, repetitive materials in smelters, and copper scrap. adjust.

[0005] The PS converter used for smelting copper is a cylindrical furnace body placed horizontally, lined with magnesia or chrome-magnesia bricks, and an electric motor for convenient insertion and discharge. Allows you to lean back and forth. There are many tuyeres below the side of the furnace, from which the gauge pressure is 100 kPa (1 kg / cm2)
A certain amount of pressurized air is blown into the molten mat.

[0006] The blister copper from the converter is charged into a refining furnace in a molten state to remove solid oxides mixed in the blister copper, and then reduced with natural gas, LPG, heavy oil, ammonia or the like to obtain copper grade 9
It is refined to 9.0% or more, and cast into an anode. The anode and anode are subjected to electrolytic refining using a seed plate (a titanium plate as a cathode, a thin plate of electrodeposited copper obtained by immersing or coating in a stripping solution and then electrolyzing all day and night) as a cathode. Cathode copper (copper grade 99.99%, electrolytic copper) is commercially available as it is, but is melted in a melting furnace, adjusted for oxygen content, etc., and cast into an appropriate mold for commercial sale.

[0007]

As described above, since each process of copper smelting is performed in a series of flows, if the operation of the previous process is stopped, the supply of raw materials to the next process is stopped. Resulting in. For example, there is a case where the operation of the furnace is unavoidably stopped for a period of about one month a year for periodic inspection, repair and repair of a smelting furnace such as a flash smelting furnace. In this case, during the inspection and repair period, the smelting work to make the mat will not be possible, so the supply of the mat to be sent to the converter will be stopped, and the production of blister copper will not be possible, which will hinder the production of electrolytic copper . Also, in order to maintain the production volume of electrolytic copper, it is necessary to build and store the necessary anodes and anodes during the shutdown period before shutting down the furnace, so the production capacity of the smelting process is the production capacity of electrolytic copper. It is necessary to provide equipment that exceeds the requirements. Furthermore, considerable space is required to store the built-up anode.

Accordingly, the present invention solves the above-mentioned problems and eliminates the gap between the production capacity of the smelting process and the electrolytic process in copper smelting, thereby enabling periodic inspection and repair and repair of a smelting furnace such as a flash smelting furnace. It is an object of the present invention to provide a method capable of continuing production of electrolytic copper with a small amount of stored anode anode even when the operation of the furnace is unavoidably stopped.

Another object of the present invention is to provide an apparatus for charging a refining furnace for an anode cast material and / or an unused defective anode plate, which is extremely effective in carrying out such a method.

[0010]

According to the present invention, in order to solve the above-mentioned problems, the copper ore is separated into a mat and a slag, and then the mat is blown in a converter, and the obtained blister copper is obtained. In a copper smelting method for obtaining electrolytic copper by removing and purifying impurities such as oxygen in a refining furnace to cast an anode plate, and immersing the anode plate in an ion conductor such as an aqueous electrolyte solution and performing electrolytic refining, Anode casting material and / or unused defective anode plates generated in large quantities during electrolytic refining during the shutdown period of the flash smelting furnace or converter are charged into the refining furnace, melted, and regenerated as anode plates. To provide a method of recycling anode cast material and the like.

In order to solve the above-mentioned problem, the present invention according to claim 2 has a structure in which a large number of anode recast materials and / or both ears of an unused defective anode plate are supported and stored in a recast boat. A charging device for charging the anode recast material and / or unused defective anode plates into the interior of the refining furnace from a charging port of the refining furnace, the height of the charging port of the refining furnace; A platform device having a deck portion on which a cast-back boat provided at a position protruding toward the loading port of the refining furnace is mounted, and being disposed at a position orthogonal to the axial direction of the refining furnace; and a platform device Installed in
From a cast-back boat mounted on the deck of the platform device arranged at a position orthogonal to the axial direction of the refining furnace,
A push mechanism for extruding a large number of anode recast materials and / or unused defective anode plates supported therein and dropping them into the refining furnace. provide.

According to a third aspect of the present invention, there is provided an apparatus for charging a refining furnace for an anode cast material or the like according to the second aspect, wherein the deck portion is formed to protrude from the platform. Supported by the support portion, and can be flipped up and down around the support point of the support portion, and the end of the deck portion is provided with an anode cast material and / or an unused defective anode plate extruded by a push mechanism. A shooter is provided for guiding and reliably dropping toward the charging port of the refining furnace, and for dropping into the refining furnace.

According to a fourth aspect of the present invention, there is provided an apparatus for charging a refining furnace for an anode cast material or the like according to the second or third aspect. The input device is movable by an overhead crane provided overhead.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION First, a method for recycling anode cast material and the like in copper smelting according to the present invention will be described in detail with reference to preferred embodiments shown in the drawings.
FIG. 1 is a flowchart showing a method for recycling anode cast material and the like in copper smelting according to the present invention.

First, the work process in the normal operation state where all the furnaces and equipment in each process are operating is the same as the conventional process. That is, the ore used as a raw material is mined from a mine, and the mined ore is subjected to smelting as a high-grade copper concentrate by a beneficiation process. Copper concentrate is smelted in a flash smelting furnace to oxidize Fe in the copper concentrate and combine it with SiO ₂ added as a solvent to form slag, and copper is concentrated as a sulfide melt mat (step 1).

Next, the mat is sent to a converter to oxidize the mat to be blister copper (step 2), and the obtained blister copper is charged into a refining furnace in a molten state, and is then mixed with natural gas, LPG, heavy oil, ammonia or the like. It is reduced and refined to a copper grade of 99.0% or more. Then, this is cast into an anode / anode (step 3).
Electrolytic purification is performed using the anode anode and the seed plate as cathodes (step 4). Anode The anode is generally about 1 m in length and width and about 4 cm in width. Fifty anodes and 51 cathodes are immersed in one electrolytic cell.

As the electrolytic refining proceeds, copper moves from the anode side to the cathode side, and the anode and anode gradually dissolve and become thin. If the thickness is too small, there will be an operational problem that a part will be cut off and fall off. On the other hand, at the time of electrolytic refining, the distance between the seed plate, which is the cathode, and the anode and anode in the electrolytic cell is about 5c.
The anode anode, which needs to be maintained at about m, and is not molded correctly due to bending or the like during casting, is considered to be a defective anode plate that cannot be used because it may come into contact with the cathode and cause a short circuit. As described above, in the normal smelting operation, an anode cast material (electrolytic residue copper) having a copper purity of 99.0% or more and a defective anode plate gradually accumulate. As described above, in the electrolytic smelting process, about 15 to 20% of the anode anode is made of an anode cast material or the like.

During normal operation, the anode cast material or the like is charged into the converter as a cold material to adjust the temperature rise in the converter (step 5), but the operation of the flash smelting furnace or the converter is stopped. In this case, the cast-back anode material and / or the defective anode plate are returned to the refining furnace to be used for casting the anode anode (step 6). Then, electrolytic refining is performed by using the anode and the cast anode again to produce electrolytic copper. It is impractical to stow the anode cast material and the defective anode plate generated during normal operation in preparation for the operation of the flash smelting furnace and the converter, when the operation is started.
Therefore, when the production of blister copper is stopped, if recast anode material or defective anode plate is recast and used as an anode anode for electrolytic refining, supply as electrolytic copper becomes possible.

Next, an apparatus for charging a refining furnace such as an anode recast material for charging an anode recast material or a defective anode plate to a refining furnace will be described. FIG. 2 is a side view showing an embodiment of an apparatus for charging a refining furnace such as an anode recast material, FIG. 3 is a side view of the apparatus for charging a refining furnace when charging an anode recast material or the like, and FIG. 1 is a front view of an apparatus for charging a refining furnace for an anode cast material and the like.

A refining furnace charging apparatus 10 for refining anode cast material and the like according to the present invention generally includes a platform device 12 having a frame structure made of a structural material, and a cast-back boat provided on an upper portion of the platform device 12. 1 on which the deck 1 is placed, and the platform device 1
2 and a push mechanism 18 installed at the upper part.

As shown schematically in FIG. 5, the cast cast boat 1 has an anode cast material 3, which is generated in large quantities during electrolysis, penetrates its ears 3a in a substantially U-shaped cross section in the longitudinal direction. It is stored while being supported by the support plate 1a of the cast-back boat 1. These anode cast materials 3 are usually put into a converter as a cold material in the copper making stage, and are charged into a refining furnace 5 and cast again as anode plates. In the following description, only the anode cast-back material will be described, but a defective anode plate is of course included.

In the preferred embodiment shown, the cast-back boat 1 is raised and lowered by means of a hook crane by means of an overhead crane. A stopper projection 1e and a stopper plate 1c are provided on the top surface and the end surface of the cast-back boat 1 on the side where the push plate 18b of the push mechanism 18 is inserted, so that the anode cast material 3 is pushed. It is configured not to fall down to the mechanism 18 side. Further, although not clearly shown in the figure, the upper surface of the support plate 1a of the cast-back boat 1 is set higher on the side where the anode cast material 3 is charged than on the push mechanism 18 side. This prevents the anode recast material 3 from falling to the charging side.

The platform device 12 has a frame structure made of a structural material. The upper portion of the platform device 12 is located at the height of the charging port 5a of the refining furnace 5 so as to protrude toward the charging port 5a of the refining furnace 5. A deck portion 12b on which the cast-back boat 1 is provided is provided. Hooks (not shown) are arranged at predetermined positions on the frame in a well-balanced manner, and the entire refining furnace charging apparatus 10 can be easily moved by an overhead crane in the factory. Accordingly, when it is necessary to perform the operation of charging the anode casting material 3 into the refining furnace 5, the refining furnace charging apparatus 10 is moved by using the overhead crane installed in the factory, and the operation of the refining furnace 5 is performed. Installed on the floor. When the refining furnace charging device 10 is not used, it is moved to a predetermined place again by using the overhead crane and stored.

At the end of the deck portion 12b, the shooter 1 is pressed so that the anode cast material 3 extruded by the push mechanism 18 does not jump out of the charging port 5a of the refining furnace 5.
7 is attached. The deck portion 12b is supported by a support portion 17a formed so as to protrude from the platform device 12, and the deck portion 12b is capable of jumping up and down about a support point 17b of the support portion 17a as a center of rotation. That is, a chain 17d is connected to a rotating motor 17e at the end 17c of the deck portion 12b located on the opposite side to the loading port 5a of the refining furnace 5, and the chain 17d is driven by driving the motor 17e. The end portion 17c is pulled down through. As a result, the deck portion 12b rotates upward about the support point 17b.

The push mechanism 18 is arranged at the uppermost part of the platform device 12 and is provided with a slide part 18a reciprocally movable in the direction of the refining furnace 5, a push plate 18b fixed to the tip of the slide part 18a. , A chain 18d connected to the slide portion 18a, and a motor 18e that rotates. The push plate 18b has a shape like an elongated baseball home base, and thereby enters the cast-back boat 1 without interfering with the stopper plate 1c fixed to one end of the cast-back boat 1. be able to.

Next, the operation of the illustrated refining furnace charging apparatus 10 will be described. First, the refining furnace charging device 10 is moved using an overhead crane installed in a factory, and is installed on the working floor of the refining furnace 5. Then, the deck portion 12b is flipped up and moved upward, and the lid attached to the charging port 5a of the refining furnace 5 is removed using an overhead crane or the like (see FIG. 2). After returning the deck portion 12b to the original position, the cast-back boat 1 containing a large number of anode cast-back materials 3 is moved from a storage position of the cast-back boat 1 provided in the smelter by a moving means such as a forklift. It is arranged on the deck 12b of the platform device 12 by a carrying overhead crane or the like.

The push plate 18b of the push mechanism 18
To extrude the anode cast material 3 and drop it toward the charging port 5a of the refining furnace 5 (see FIG. 3). After loading the anode casting material 3 in the casting boat 1, the casting boat 1 is replaced with another boat by the overhead crane, and the operation is sequentially repeated. After loading a predetermined amount of the anode cast material 3, the deck portion 12b is flipped up and moved to the upper side, and a lid is attached to the loading opening 5a using an overhead crane. Then, after heating and melting with a heavy oil burner installed at one end of the refining furnace 5, the refining furnace 5 is tilted to the tuyere 5c side to perform reduction purification. When the reduction is completed, the refining furnace 5 is tilted to the casting port 5b side, and the molten copper is poured out and re-cast, and used as an anode in the electrolytic refining process.

[0028]

According to the present invention, the anode cast material and / or the anode cast material generated in the electrolytic smelting process during the shutdown period of the flash smelting furnace or the converter is provided.
Alternatively, an unused defective anode plate is charged into a refining furnace, melted, and regenerated as an anode plate. There is an effect that the production of can be continued.

Also, a deck is provided at a height position of the charging port of the refining furnace, on which a cast-back boat is provided, protruding toward the charging port of the refining furnace, and is orthogonal to the axial direction of the refining furnace. And a push mechanism for extruding the anode cast material and / or unused defective anode plate from the cast boat mounted on the deck portion and dropping it into the refining furnace. With this configuration, the operation of charging the anode cast material and the like into the refining furnace is extremely easy.

Further, since the shooter is mounted on the deck portion, the anode cast material and / or unused defective anode plate pushed out by the push mechanism are guided and surely dropped toward the insertion port of the refining furnace. There is an effect that it can be charged into the refining furnace. In addition, the refining furnace charging device for anode cast materials etc. can be moved by an overhead crane installed above, so it is arranged only when the furnace is stopped for periodic inspection, repair and repair, etc. Since it can be moved to another place, there is also an effect that work during normal operation is not alienated.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a method for recycling anode cast material and the like in copper smelting according to the present invention.

FIG. 2 is a side view showing an embodiment of an apparatus for charging a refining furnace for an anode cast material or the like.

FIG. 3 is a side view of the refining furnace charging apparatus of FIG. 2 at the time of charging an anode cast material and the like.

FIG. 4 is a front view of an apparatus for charging a refining furnace for the anode cast material and the like shown in FIG. 2;

FIG. 5 is a schematic perspective view of a cast-back boat used in the charging device of FIG. 1; I have.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 cast-back boat 3 anode cast-back material 3a ears 5 refining furnace 5a charging port 5b casting port 5c tuyere 10 refining furnace charging device 12 platform device 12b deck portion 17 shooter 17a support portion 17b support point 17c end 17e motor 17d Chain 18 Push mechanism 18a Slide 18b Push plate 18d Chain 18e Motor

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsukazu Hiramatsu 3382-3, Seki, Saganoseki-cho, North Sea District, Oita Pref. AA21 BA21 BB03 EC04 FA08

Claims (4)

[Claims] After separating the copper ore into a mat and a slag, the mat is blown in a converter, and the resulting blister copper is refined in a purifying furnace to remove impurities such as oxygen to cast an anode plate. In the copper smelting method of obtaining electrolytic copper by immersing the anode plate in an ionic conductor such as an aqueous electrolyte solution and performing electrolytic refining, anode casting generated in large quantities during electrolytic refining during the shutdown period of the flash smelting furnace or converter A method for recycling anode cast material or the like, characterized in that a material and / or unused defective anode plate is charged into a refining furnace, melted and regenerated as an anode plate. 2. A method in which a plurality of anode cast materials and / or both ears of unused defective anode plates are supported and housed in a cast cast boat, and the anode cast material and / or unprocessed anode plate are fed through a charging port of a refining furnace. A charging device for an anode cast material or the like for charging a poorly used anode plate into the inside of the refining furnace, the device being provided at a height position of the charging port of the refining furnace so as to protrude toward the charging port of the refining furnace. A platform device having a deck portion on which the cast-back boat is placed and arranged at a position orthogonal to the axial direction of the refining furnace; and installed on the platform device, orthogonal to the axial direction of the refining furnace. A large number of anode cast materials and / or unused defective anode plates supported on the inside of the cast-back boat placed on the deck portion of the platform device placed at the position are pushed out of the refining furnace and Refining furnace charging device such as the anode casting flashing materials composed comprising: a push mechanism for dropping, the. 3. The apparatus for charging a refining furnace for an anode cast material or the like according to claim 2, wherein the deck portion is supported by a support portion formed so as to protrude from the platform, and rotates around a support point of the support portion. At the end of the deck portion, an anode cast material extruded by the push mechanism and / or an unused defective anode plate is guided at an end of the deck portion, and is guided to an inlet of the refining furnace. An apparatus for charging a refining furnace such as an anode cast material, which is attached with a shooter for reliably dropping toward the refining furnace and charging the refining furnace. 4. The apparatus for charging a refining furnace for an anode cast material or the like according to claim 2 or 3, wherein the apparatus for charging a refining furnace for the anode cast material or the like is movable by an overhead crane provided overhead. An apparatus for charging a refining furnace for an anode cast material or the like, wherein