KR20200059831A - Apparatus for making copper pellet of dry smelting and the method for the pellet using the same apparatus - Google Patents

Abstract

The present invention relates to a manufacturing apparatus of a pellet for dry refining and a manufacturing method of a pellet for dry refining using the same. Specifically, the manufacturing apparatus of a pellet for dry refining comprises: a mixing unit to mix a raw material including copper-containing sludge and a subsidiary material consisting of at least one material at a prescribed ratio; and a compression unit to compress a mixed sample mixed by the mixing unit at a predetermined pressure. The mixing unit includes: a mixing tank having a mixing space to accommodate the raw material and the subsidiary material therein; a sample insertion port arranged on an upper portion of the mixing tank to communicate with the inside of the mixing tank to insert the raw material and the subsidiary material; a binder insertion port arranged on an upper portion of the mixing tank to communicate with the inside of the mixing tank to insert a binder; a binder spray unit arranged on the lower end of the binder insertion port to spray the binder into the mixing tank; and a sample mixing driving unit to mix the raw material and the subsidiary material while the binder is sprayed by the binder spray unit. A productivity reduction problem caused by an air permeability problem in a dry refining process can be overcome.

Description

Pellet manufacturing apparatus for dry smelting and a method for manufacturing the pellets {APPARATUS FOR MAKING COPPER PELLET OF DRY SMELTING AND THE METHOD FOR THE PELLET USING THE SAME APPARATUS}

The present invention relates to an apparatus for manufacturing pellets for dry smelting and a method for manufacturing pellets for dry smelting using the same, wherein the apparatus for producing pellets for dry smelting which uses copper-containing sludge having a copper content of less than 20% as a pellet for dry smelting and using the same It is related with the pellet manufacturing method.

Copper (Cu), the largest used strategy in Korea, is used as a core raw material for electric / electronic products, industrial machinery, automobiles, and construction materials. As of 2017, the domestic demand for copper is about 900,000 tons, which is dependent on imports, so it is urgent to prepare a stable raw material supply measure to protect and develop the related industries.

In Korea, where there are many copper-related industries, various wastes are generated, and among them, some high-quality (more than 20% Cu) copper-containing sludge is re-resourced using a dry smelting process.

The main source of copper-containing sludge is a printed circuit board (PCB) processing / etching and plating process, which generates about 70,000 tons of copper-containing sludge annually in Korea, but low-grade copper-containing sludge with a lower copper content than high-quality copper-containing sludge ( Cu content less than 20%) is mostly sold overseas or landfilled.

The amount of low-grade (less than 20% Cu) copper-containing sludge is about 50,000 tons / year, which is 2.5 times higher than that of high-quality copper-containing sludge (20,000 tons). In addition to copper, precious metals such as Ag, Au, Pd, and Pt are also included. It is known to be worth about 24 billion won because it is included. For this reason, the metal component recovery technology for low-grade copper-containing sludge that is not currently recycled in Korea is urgently required.

On the other hand, the copper-containing sludge exists as ultra-fine particles of 10 µm or less, and has a moisture content of at least 40%. Therefore, when it is directly added to the dry smelting process, the air permeability in the blast furnace is deteriorated, resulting in a rapid decrease in productivity or moisture in the process. Due to the evaporation of the problem may occur due to the increase in the vapor pressure inside the blast furnace. For this reason, as a pre-treatment process for input to dry smelting, it is a situation that requires the development of a pellet manufacturing process of a certain size or more in a controlled state with a moisture content of 10% or less.

The present invention has been devised to solve the above technical problem, and solves the problem of high water content and fine particle size of copper-containing sludge which adversely affects the process efficiency in the dry smelting process, resulting in productivity according to the breathability problem in the dry smelting process. An object of the present invention is to provide an apparatus for manufacturing pellets for dry smelting and a method for manufacturing the pellets using the same.

One embodiment of a pellet manufacturing apparatus for dry smelting according to the present invention is a mixing unit for mixing a raw material containing copper-containing sludge and a subsidiary material composed of at least one material at a predetermined ratio and mixed by the mixing unit It includes a compression unit for compressing the mixed sample to a predetermined pressure, and the mixing unit is provided at the top of the mixing tank so as to communicate with the inside of the mixing tank, the mixing tank is provided with a mixing space for receiving the raw materials and subsidiary materials therein Is, the sample inlet for injecting the raw material and the subsidiary material, is provided on the upper portion of the mixing tank to communicate with the interior of the mixing tank, the caking agent inlet for injecting the caking agent, provided at the bottom of the caking agent inlet And a sample mixing driving unit for mixing the raw material and the subsidiary material while the caking agent is sprayed by the caking agent spraying unit spraying the caking agent into the mixing tank.

Here, the mixing unit may further include a condensation preventing unit that supplies a predetermined heat to the caking additive inlet to prevent condensation of the caking agent accommodated in the caking additive.

In addition, the anti-condensation unit may be automatically controlled according to the temperature of the caustic agent injected into the caustic inlet.

In addition, the sample mixing driving unit may include at least one impeller rotated by being coupled to a vertical rotation axis of the mixing motor and a mixing motor disposed at an upper portion of the mixing tank and having a vertical rotation axis extending into the mixing tank. Can be.

In addition, it may further include a scraping portion for scraping the raw material or the material aggregated on the inner wall surface of the mixing tank by the caking agent injected through the caking agent.

In addition, the scraping unit may include a ring-shaped scraper provided to be able to reciprocate up and down while the outer circumferential surface rubs along the inner wall surface of the mixing tank and a motor for vertically transporting the scraper up and down.

In addition, the scraper may be provided to be able to move vertically and reciprocally between the upper end of the impeller of the mixing driving part and the caking agent spraying part of the mixing space of the mixing tank.

In addition, the compression unit may be disposed horizontally on one side of the lower end of the mixing unit.

In addition, a mixing sample opening and closing portion is provided at the bottom of the mixing tank of the mixing portion, and a sample transferring portion for transferring the mixed sample discharged through the mixing sample opening and closing portion to the compression portion may be further included.

In addition, the sample transport unit includes a transport pipe which is horizontally disposed under the mixed sample opening and closing part, and has a hollow inside, a transport screw axially disposed inside the transport pipe, and a transport motor for axially rotating the transport screw. can do.

In addition, the compression unit includes a mixed sample storage tank for storing a mixed sample supplied through the front end of the transfer pipe of the sample transfer unit and a pressurizing unit for pressing the mixed sample supplied downward from the mixed sample storage tank to a predetermined pressure. can do.

In addition, the compression unit may further include a sample aggregation prevention unit that prevents aggregation of the mixed sample accommodated in the mixed sample storage tank.

In addition, the sample aggregation prevention unit may include a rotating impeller rotated inside the mixed sample storage tank.

In addition, the pressurizing portion includes a pressurizing portion provided on one side and a pressurizing portion provided on the other side based on a pressurizing space formed at the bottom of the mixed sample storage tank, and the pressurizing portion on the one side and the pressurizing portion on the other side are each hydraulically It may include a working hydraulic cylinder and a pressing pin that is reciprocated in the horizontal direction by the hydraulic cylinder to simultaneously press the mixed sample supplied in the pressing space on both sides.

One embodiment of a pellet manufacturing method using a pellet manufacturing apparatus for dry smelting according to the present invention is a material crushing process of crushing a raw material containing copper-containing sludge and a subsidiary material comprising at least one material into a predetermined particle size range, respectively. The material input process for introducing the sample pulverized through the material crushing process into the mixing tank at a predetermined ratio, the mixing process for mixing the samples added to the mixing tank by the material input process, and the sample mixed during the mixing process And a mixing sample pressing process for preparing pellets by pressing a mixing agent spraying process supplied by spraying a caking agent to the mixed sample by the mixing process, and the material input process, mixing of the raw material and the subsidiary material It is characterized in that the ratio is 65wt%: 35wt%.

Here, the subsidiary material is made of SiO ₂ , CaCO ₃ and Cokes, and when the weight concentration (wt%) of the material injected during the material injection process is 100, the SiO ₂ 17.5wt%, the CaCO ₃ 14.5wt%, the Cokes 3wt% may be added in a ratio.

In addition, further comprising a drying process for drying the raw material before the material crushing process, the drying process, when the moisture content of the raw material copper-containing sludge is 60%, drying for 120 minutes in a dryer at 100 ℃ It can be a process.

In addition, the material crushing process may be a process of pulverizing the raw materials and materials to a particle size of 100 to 325 mesh.

In addition, the weight of the raw material input by the material input process is 10 kg versus the weight of the subsidiary material is 5 kg, and the total moisture content of the raw material and the subsidiary material may be 6 wt%.

In addition, the spraying process of the caking additive, the water content of the sample containing the raw material and the subsidiary material contained in the interior of the mixing tank by dissolving CMC (carboxymethyl cellulose) in distilled water at a rate of 5g / L It may be a process of spraying 600mL at a rate of 10mL / min to be 10wt%.

Further, the mixing process may be a process performed by rotating the impeller provided inside the mixing tank at a speed of 80 rpm.

In addition, the mixing sample pressing process may be a process of repeatedly pressing the mixed sample transferred to the pressing space 3 to 5 times using a pressing pin interlocking with a hydraulic cylinder controlled at a pressure of 5 tons.

According to an embodiment of the pellet manufacturing apparatus for dry smelting according to the present invention and a method for manufacturing the pellets, a sample containing a copper-containing sludge that has undergone the process of dry disintegration classification is mixed with a sample by a mixing unit, and then a compression unit is used in a continuous process to obtain a predetermined size or more Since it is possible to manufacture pellets, it solves the problem of high moisture content and fine particle size of copper-containing sludge, which adversely affects process efficiency in the dry smelting process, and has the effect of solving the productivity reduction problem due to the breathability problem in the dry smelting process. .

1 is a cross-sectional view showing an embodiment of a pellet manufacturing apparatus for dry smelting according to the present invention,
2 is a cross-sectional view showing a mixing unit in the configuration of Figure 1,
3 is a cross-sectional view showing a compression unit in the configuration of Figure 1,
Figure 4 is a flow chart showing an embodiment of a pellet manufacturing method according to the present invention,
5 is a live-action diagram showing a mixing part of the configuration of FIG. 1,
Figure 6 is a live-action pellets produced using a pellet manufacturing apparatus for dry smelting according to the present invention.

Hereinafter, an embodiment of a pellet manufacturing apparatus for dry smelting and a method for manufacturing the pellet according to the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing the embodiments of the present invention, when it is determined that detailed descriptions of related well-known configurations or functions interfere with the understanding of the embodiments of the present invention, detailed descriptions thereof will be omitted.

In describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. In addition, unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms such as those defined in a commonly used dictionary should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

1 is a cross-sectional view showing an embodiment of a pellet manufacturing apparatus for dry smelting according to the present invention, FIG. 2 is a cross-sectional view showing a mixing part of the configuration of FIG. 1, and FIG. 3 is a cross-sectional view showing a compression part of the configuration of FIG. 1.

First, prior to the description of the pellet manufacturing method using the pellet manufacturing apparatus for dry smelting according to the present invention, the configuration of the apparatus will be described first.

An embodiment of a pellet manufacturing apparatus for dry smelting according to the present invention includes a mixing unit 100 and a mixing unit (100) for mixing a raw material containing copper-containing sludge and a subsidiary material comprising at least one material at a predetermined ratio. It includes a compression unit 200 for compressing the mixed sample mixed by 100) to a predetermined pressure.

Here, the raw material, the copper-containing sludge generally refers to a low-grade copper-containing sludge with a low copper content, and can be defined as limited to a low-grade copper-containing sludge having a copper content of less than 20%, especially when defined as a copper content ratio.

In addition, the subsidiary material inputted during pellet production together with the raw material includes silica (SiO ₂ ), calcium carbonate (CaCO ₃ ), and cokes, and is crushed to a predetermined particle size as described below before being mixed with the raw material. Is ready.

More specifically, when the weight concentration (wt%) of the raw material and the subsidiary material is introduced into the mixing part 100 to be described later for mixing is 100, the raw material may have a ratio of 65 wt% and the subsidiary material 35 wt%. .

Particularly, the ratio of silica (SiO ₂ ), calcium carbonate (CaCO ₃ ), and coke as a subsidiary material is 17.5 wt%: 14.5, respectively, when the weight concentration (wt%) introduced into the mixing unit 100 is 100. It is preferable to have a ratio of wt%: 3wt%.

Here, when the raw material is a copper-containing sludge having a water content of 60%, it is introduced into a dryer at 100 ° C to remove the contained moisture, dried for 120 min (minutes), and then loaded with a rod mill (not shown). It may be prepared by disintegration for 10 min (min).

In addition, the raw materials and the subsidiary materials may be prepared by being pulverized in each process before being put into the mixing unit 100 and pulverized to a particle size of 100 to 325 mesh.

The raw materials and subsidiary materials prepared as described above are input to the mixing unit 100 during the configuration of the pellet manufacturing apparatus for dry smelting according to the present invention.

The mixing unit 100, as referenced in Figure 2, the mixing tank 110 is provided with a mixing space for receiving raw materials and materials therein, and the mixing tank 110 to communicate with the interior of the mixing tank 110 It is provided on the upper portion of the sample inlet 120 for injecting raw materials and subsidiary materials, and is provided on the top of the mixing tank 110 so as to communicate with the interior of the mixing tank 110, the caking agent inlet for injecting the caking agent (130), the caking additive is provided at the bottom of the inlet 130, the caking agent spraying part 140 for spraying the caking agent into the mixing tank 110, and the caking agent by the caking agent spraying part 140 It may include a sample mixing driving unit 160 for mixing the raw material and the subsidiary material during spraying.

Mixing tank 110, the mixing space provided therein has a substantially cylindrical shape, the lower end may be formed in the form of a cowl that becomes smaller and smaller in diameter as it goes down.

The sample inlet 120 and the caking agent inlet 130 may be provided symmetrically left and right in a portion corresponding to the upper surface of the mixing tank 110.

Through the sample inlet 120, as described above, the raw materials and the subsidiary materials in a crushed state may be introduced at a predetermined ratio. The caking agent prepared by dissolving CMC (carboxymethyl cellulose) in distilled water at a rate of 5 g / L may be introduced into the caking agent inlet 130. Particularly, the caking agent may be injected into the mixing tank 110 by the caking agent spraying unit 140 so that the water content of the sample consisting of the raw material and the subsidiary material is 10 wt%.

On the other hand, the caking agent spraying unit 140 serves to inject the caking agent accommodated in the caking agent inlet 130 by a spray spraying method. Therefore, although not shown, an injection pressure forming unit and a nozzle unit for forming a predetermined injection pressure may be provided. The nozzle unit may be operated in a rotational driving manner so that it is evenly injected into the mixing tank 110.

In addition, one embodiment of the pellet manufacturing apparatus for dry smelting according to the present invention, although not shown in the drawing, a predetermined heat is applied to the caking additive 130 to prevent condensation of the caking additive contained in the caking additive 130 A condensation preventing part to be supplied may be further provided.

Here, it is preferable that the condensation preventing unit is provided to be automatically controlled according to the temperature of the caking agent injected into the caking agent inlet 130.

On the other hand, the sample mixing driving unit 160, as shown in Figure 2, is disposed on the upper portion of the mixing tank 110 and the mixing motor 161 is disposed so that the vertical axis of rotation extends into the interior of the mixing tank 110, It may include at least one impeller 165 is rotated coupled to the vertical rotation axis of the mixing motor 161.

When the vertical rotation shaft 163 is rotated by the mixing motor 161, at least one impeller 165 coupled to the vertical rotation shaft 163 is rotated inside the mixing tank 110, and raw materials and materials added to the sample inlet 120 To be mixed while stirring with the caking agent injected through the caking agent 140. At this time, it has already been described above that the amount of the caking agent to be added is such that the water content of the sample to be mixed is 10 wt% as described above.

The rotation speed of the mixing motor 161 is set to 80 rpm when the weight of the copper content sludge as a raw material is 10 kg and the total weight of the SiO ₂ , CaCO ₃ and cokes as an auxiliary material is 5 kg, and the water content of the sample is 10 wt%. It is desirable.

On the other hand, in one embodiment of the pellet manufacturing apparatus for dry smelting according to the present invention, scraping scraping raw materials or materials aggregated on the inner wall surface of the mixing tank 110 by the caking agent injected through the caking agent 140 The unit 150 may be further included.

The scraping part 150 removes some samples aggregated on the inner wall surface of the mixing tank 110 by the caking agent sprayed by the caking agent spraying part 140 by scraping (ie, scraping), It serves to prevent a part of the mixed sample from being formed heterogeneously by some aggregated sample.

The scraping part 150 serving as such, as shown in FIG. 2, is provided with a ring-shaped scraper 157 which is provided to be able to reciprocate up and down while the outer circumferential surface rubs along the inner wall surface of the mixing tank 110 ( scraper), and may include a motor 155 for vertical transportation that moves the scraper 157 vertically.

The up and down transfer motor 155 is provided on the upper surface of the support plate 153 horizontally provided on the upper side of the mixing tank 110, and one end is extended to a portion corresponding to the outside of the mixing space of the mixing tank 110 The other end portion further includes a plurality of guide shaft rods 151 connected to the upper surface of the support plate 153, and a scraper 157 is connected to a part of the guide shaft rod 151 so that the scraper 157 is transported up and down. In conjunction with the rotational motion of the dragon motor 155, the vertical reciprocating motion is performed. Here, the scraper 157 is preferably provided to be able to move vertically and reciprocally between the upper end of the impeller 165 of the mixing driving unit 160 and the caking agent injection unit 140 in the mixing space of the mixing tank 110.

Meanwhile, a mixed sample opening / closing unit 170 for discharging the mixed sample mixed by the sample mixing driving unit 160 may be provided at a lower end of the mixing tank 110. In more detail, the mixed sample opening / closing unit 170 may be provided in a form that can be opened and closed at a lower end provided in the form of a cone of the mixing tank 110. For example, the mixed sample opening / closing unit 170 maintains a closed state during the process of mixing the raw material and the subsidiary material with the caking agent injected by the sample mixing driving unit 160, and then compressing the sample by the sample transport unit 300 described later. If a mixed sample supply to the 200 is required, it may be operated to open.

In addition, one embodiment of the pellet manufacturing apparatus for dry smelting according to the present invention, the sample transfer unit for transferring the mixed sample discharged through the mixed sample opening and closing portion 170 of the mixing unit 100 to the compression unit 200 to be described later ( 300) may be further included.

1 and 2, the sample transfer unit 300 is horizontally disposed at the lower portion of the mixed sample opening and closing portion 170 and the interior of the transfer pipe 310 is empty and the interior of the transfer pipe 310 It may include a transfer screw 320 disposed to be axially rotatable, and a transfer motor 330 for axially rotating the transfer screw 320.

Therefore, the mixed sample supplied into the transfer pipe 310 is a compression unit to be described later along the screw bone of the transfer screw 320 while the transfer screw 320 is rotated in place by rotational driving of the transfer motor 330 The quantity may be moved to the side where the 200 is provided.

Meanwhile, as shown in FIGS. 1 and 3, the compression unit 200 is horizontally disposed on one side of the lower end of the mixing unit 100 to be supplied via the sample transfer unit 300 from the mixing unit 100. Pressing the mixed sample serves to finally produce pellets.

More specifically, as shown in FIGS. 1 and 3, the compression unit 200 is a mixed sample storage tank 210 for storing the mixed sample supplied through the tip of the transfer pipe 310 of the sample transfer unit 300 ) And a pressurizing portion 230 for pressing the mixed sample supplied from the mixed sample storage tank 210 to a predetermined pressure.

Inside the mixed sample storage tank 210, as shown in Figs. It may be provided.

In addition, vibrators 260 may be provided on both sides of the mixed sample storage tank 210 to prevent a mixed sample from being aggregated or attached to the mixed sample storage tank 210 by adding a predetermined vibration.

Here, the lower portion of the mixed sample storage tank 210 is provided with a pressurized line to pressurize the sample as a pressurized space 245, and when a mixed sample is filled in the pressurized line of the pressurized space, the pressurization unit 230 is used to mix the sample. The sample is pressed.

The pressurizing line may be provided in the form of an empty space having a shape corresponding to the diameter of a pellet that is usually finally produced, but it may also be provided in the form of a pipe.

The pressing unit 230 may include one pressing unit 240 provided on one side and the other pressing unit 250 provided on the other side based on the pressing space of the mixed sample storage tank 210.

Here, one side of the pressing portion 240 and the other side of the pressing portion 250, respectively, receiving hydraulic pressure from the hydraulic tank 241 on one side, hydraulically operated hydraulic cylinders 242 and hydraulic cylinders 242 are horizontal It may include a pressing pin 243 for reciprocating in the direction to simultaneously press the mixed sample supplied in the pressing space from both sides.

However, it is not necessary that both the pressing part 240 and the other pressing part 250 have a pin 243 for pressurizing, and the other pressing part 250 prevents the other side of the mixed sample filled in the pressing line from being predetermined. It is sufficient to serve as a supporting force by hydraulic force, and it is sufficient if a pressure pin 243 is formed only on one side of the pressing portion 240 to supply sufficient pressure through the pressing line.

Of the configuration of the pressing portion 230, the hydraulic cylinder 242 may generate a pressure of 5 tons, and the pressing pin 243 may be formed to have a size equal to 10 mm, which is the diameter of the pellet that is finally manufactured. .

The pellet generated by the pressing unit 230 may be discharged after opening the other side of the pressing space through the other pressing unit 250, and a plurality of pellets may be manufactured through one cycle of pressing operation.

Figure 4 is a flow chart showing an embodiment of a pellet manufacturing method according to the present invention, Figure 5 is a live view showing the mixing portion of the configuration of Figure 1, Figure 6 is manufactured using a pellet manufacturing apparatus for dry smelting according to the present invention It is a due diligence of pellets.

When explaining an embodiment of a pellet manufacturing method using a pellet manufacturing apparatus for dry smelting according to the present invention are as follows.

Pellet production method according to an embodiment of the present invention, as shown in Figure 4, the material grinding process (S20), the material input process (S30), the mixing process (S40), and the caking agent spraying process (S50) ) And a mixed sample pressing process (S60).

More specifically, the material crushing process (S20) is a process performed before using the pellet manufacturing apparatus according to the above-described embodiment of the present invention, a raw material including copper-containing sludge and at least one material. It may be a process of grinding each to a predetermined particle size range.

Here, the copper-containing sludge to be crushed is a low-grade copper-containing sludge, and may have a water content of 60%. In addition, the material to be crushed may include silica (SiO ₂ ), calcium carbonate (CaCO ₃ ), and coke (Cokes).

Here, when the content ratio of the raw material and the subsidiary material is 100, the weight concentration (wt%) of the mixed sample to be mixed is preferably 65 wt%: 35 wt%. In addition, under the same conditions, the mixing ratio of silica (SiO ₂ ), calcium carbonate (CaCO ₃ ), and coke (Cokes), which are subsidiary materials, preferably has a ratio of 17.5 wt%: 14.5 wt%: 3 wt%, respectively. For this, it has already been described in detail in the description of the pellet manufacturing apparatus for dry smelting according to an embodiment of the present invention.

Meanwhile, the pellet manufacturing method according to an embodiment of the present invention may further include a drying process (S10) of drying the raw material before the material crushing process (S20).

The drying process (S10) may be a process of drying for 120 minutes in a dryer at 100 ° C. when the moisture content of the raw material copper-containing sludge is 60%. The raw material thus dried may be crushed for 10 minutes using a rod mill.

On the other hand, the material crushing process (S20) may be a process of pulverizing the raw materials and the subsidiary materials containing the copper-containing sludge to a predetermined particle size range, respectively. This is a process of preparing a sample before being injected into the sample inlet 120 of the mixing unit 100, and by the material crushing process (S20), the raw materials and the subsidiary materials may be crushed equally to a particle size of 100 to 325 mesh.

In addition, the material input process (S30) is a process of injecting the sample crushed through the material grinding process (S20) at a predetermined ratio to the mixing tank 110 of the mixing unit 100. The predetermined ratio here was described in detail above.

The mixing process (S40) is a process of mixing the sample introduced into the mixing tank 110 using the mixing unit 100, as shown in FIGS. 1 and 2. That is, the mixing process (S40) is a process of mixing for a predetermined time through the mixing unit 100 so that the raw materials and materials added through the sample inlet 120 are evenly mixed. In more detail, the mixing process S40 may be a process performed by rotating the impeller 165 provided inside the mixing tank 110 at a speed of 80 rpm.

In addition, in the pellet manufacturing method according to an embodiment of the present invention, the caking agent spraying process (S50) may be a process of injecting and supplying a caking agent to a sample mixed during the mixing process (S40). The caking additive may be an additive that is mixed with the sample and then aggregated when pressed through the compression unit 200.

Commonly used caking agents include inorganic caking agents and organic caking agents. Bentonite is representative of inorganic binders, and typical examples of organic binders are carboxymethyl cellulose (CMC) and synthetic resins. In particular, CMC is a material that is synthesized by an alkaline catalytic reaction of cellulose and chloroacetic acid, and has high hydrophilicity, melts in cold water in a few hours, and is highly suitable for caking additives.

When such a caking agent is not used, there is a problem in that pellets are not molded when the sample in which the raw material and the subsidiary material are mixed is compression-molded with a weak force using the compression part 200. In the pellet manufacturing method according to, it further comprises a caking agent spraying process (S50) performed during the mixing process (S40).

Here, as a result of testing the compressive strength and drop strength of the pellets prepared under the same conditions to select the optimal caking agent, it was confirmed that the strength of the organic caking agent CMC is higher than that of the inorganic caking agent bentonite. Therefore, in the pellet manufacturing method according to an embodiment of the present invention, the caking agent injected through the caking agent spraying process (S50) was selected as CMC.

In addition, the caking agent spraying process (S50), the moisture content of the sample containing the raw material and the subsidiary material contained in the caking agent generated in the mixing tank 110 by dissolving CMC in distilled water at a rate of 5 g / L This may be a process of injecting 600 mL at a rate of 10 mL / min using the caking agent 140 to be 10 wt%.

Meanwhile, the mixing sample pressing process S60 may be defined as a process of pressing the mixed sample mixed by the mixing process S40 to finally produce pellets. The final produced pellets, as referred to in FIG. 6, are formed in a substantially cylindrical shape, and have a size of 10 mm in diameter and 16 mm in height, and the specifications of the finally produced pellets according to the dry smelting molten metal scale and heating method are Of course, various designs are possible.

The mixed sample pressing process (S60) is an operation of repeatedly pressing the mixed sample transferred to the pressurized space 3 to 5 times using a pressing pin 243 interlocking with a hydraulic cylinder 242 controlled at a pressure of 5 tons. It can be performed by the pressing operation.

Particularly, in the mixing sample pressing process (S60), a pellet having a higher strength is produced in order to minimize loss due to powder generation when performing an arc reduction operation, not shown, for recovering copper from pellets finally made of copper-containing sludge. Since it is necessary, it is preferable that it is carried out to pressurize the pellets at a pressure having a corresponding drop strength and compressive strength.

Or more, with reference to the accompanying drawings, an embodiment of a pellet manufacturing apparatus and a method for manufacturing the pellet using the pellet manufacturing apparatus for dry smelting according to the present invention has been described in detail. However, the embodiments of the present invention are not necessarily limited by the above-described embodiments, and it is natural that various modifications and equivalent implementations by a person skilled in the art to which the present invention pertains are possible. will be. Therefore, the true scope of the present invention will be defined by the claims below.

1: pellet manufacturing apparatus 100: mixing unit
110: mixing tank 120: sample inlet
130: inlet for caking agent 140: injector for caking agent
150: scraping portion 151: guide shaft
153: support plate 155: motor for vertical movement
157: scraper 160: sample mixing drive
161: mixing motor 163: vertical axis of rotation
165: impeller 170: mixed sample opening and closing
200: compression unit 210: mixed sample storage tank
220: rotating impeller 221: anti-agglomeration motor
230: pressing portion 240: one side pressing portion
241: hydraulic tank 242: hydraulic cylinder
243: pressing pin 245: pressing space
250: other pressurizing portion 300: sample transfer portion
310: conveying pipe 320: conveying screw
330: transfer motor S10: drying process
S20: Material grinding process S30: Material input process
S40: mixing process S50: caking agent spraying process
S60: mixing sample pressurization process

Claims (22)

A mixing unit for mixing a raw material including copper-containing sludge and a subsidiary material made of at least one material in a predetermined ratio; And
A compression unit for compressing the mixed sample mixed by the mixing unit at a predetermined pressure; Including,
The mixing unit,
A mixing tank having a mixing space in which the raw materials and subsidiary materials are accommodated;
It is provided on the upper portion of the mixing tank so as to communicate with the interior of the mixing tank, the sample inlet for introducing the raw material and the auxiliary material;
It is provided on the upper portion of the mixing tank to communicate with the interior of the mixing tank, the caking agent inlet for introducing a caking agent;
A caking agent spraying part provided at a lower end of the caking agent inlet to spray the caking agent into the mixing tank; And
A sample mixing driving unit mixing the raw material and the subsidiary material while the caking agent is sprayed by the caking agent spraying unit; Pellet production apparatus for dry smelting comprising a. The method according to claim 1,
The mixing unit, a condensation preventing unit for supplying a predetermined heat to the caking agent inlet to prevent condensation of the caking agent accommodated in the caking agent inlet; Further comprising, dry smelting pellet manufacturing apparatus. The method according to claim 2,
The condensation preventing unit is automatically controlled according to the temperature of the caustic agent injected into the caustic agent inlet, a device for manufacturing pellets for dry smelting. The method according to claim 1,
The sample mixing driving unit,
A mixing motor disposed above the mixing tank and having a vertical axis of rotation extending into the mixing tank; And
At least one impeller is rotated coupled to the vertical rotation axis of the mixing motor; Pellet production apparatus for dry smelting comprising a. The method according to claim 4,
A scraping part scraping the raw material or the subsidiary material aggregated on the inner wall surface of the mixing tank by the caking agent sprayed through the caking agent spraying part; Further comprising, dry smelting pellet manufacturing apparatus. The method according to claim 5,
The scraping part,
A ring-shaped scraper having an outer circumferential surface frictionally along the inner wall surface of the mixing tank and reciprocally moved up and down; And
A motor for vertical movement that moves the scraper vertically and reciprocally; Pellet production apparatus for dry smelting comprising a. The method according to claim 6,
The scraper, the pellet manufacturing apparatus for dry smelting is provided to be able to move up and down between the upper end of the impeller of the mixing drive portion and the caking agent injection portion of the mixing space of the mixing tank. The method according to claim 1,
The compression unit, the pellet manufacturing apparatus for dry smelting, disposed horizontally on one side of the lower end of the mixing unit. The method according to claim 8,
A mixing sample opening and closing portion is provided at the bottom of the mixing tank of the mixing portion,
A sample transfer unit transferring the mixed sample discharged through the mixed sample opening / closing unit to the compression unit; Further comprising, dry smelting pellet manufacturing apparatus. The method according to claim 9,
The sample transfer unit,
A transport pipe horizontally disposed under the mixed sample opening and closing portion and having an empty interior;
A transfer screw axially disposed inside the transfer pipe; And
A transfer motor for axially rotating the transfer screw; Pellet production apparatus for dry smelting comprising a. The method according to claim 10,
The compression unit,
A mixed sample storage tank for storing the mixed sample supplied through the front end of the transfer pipe of the sample transfer unit; And
A pressurizing portion for pressing the mixed sample supplied downward from the mixed sample storage tank to a predetermined pressure; Pellet production apparatus for dry smelting comprising a. The method according to claim 11,
The compression unit,
A sample aggregation prevention unit preventing aggregation of the mixed samples accommodated in the mixed sample storage tank; Further comprising, dry smelting pellet manufacturing apparatus. The method according to claim 12,
The sample aggregation prevention unit,
A rotating impeller rotated inside the mixed sample storage tank; Pellet production apparatus for dry smelting comprising a. The method according to claim 11,
The pressurizing part includes a pressurizing part provided on one side and a pressurizing part provided on the other side based on a pressurizing space formed at the bottom of the mixed sample storage tank,
Each of the pressing portion on the one side and the pressing portion on the other side,
Hydraulically operated hydraulic cylinders; And
A pressing pin for reciprocating in the horizontal direction by the hydraulic cylinder to simultaneously press the mixed sample supplied in the pressing space on both sides; Pellet production apparatus for dry smelting comprising a. A material crushing process of pulverizing a raw material including copper-containing sludge and a subsidiary material made of at least one material into a predetermined particle size range, respectively;
A material input process in which a sample pulverized through the material crushing process is introduced into a mixing tank at a predetermined ratio;
A mixing process of mixing the sample added to the mixing tank by the material adding process;
A caking agent spraying process for spraying and supplying a caking agent to the sample to be mixed during the mixing process; And
A mixing sample pressing process for preparing pellets by pressing the mixed sample mixed by the mixing process; Including,
The material input process, characterized in that the mixing ratio of the raw material and the subsidiary material is 65wt%: 35wt%, pellet manufacturing method using a pellet manufacturing apparatus for dry smelting. The method according to claim 15,
The subsidiary material is made of SiO ₂ , CaCO ₃ and Cokes,
When the weight concentration (wt%) of the material injected during the material injection process is 100, the SiO ₂ is 17.5 wt%, the CaCO ₃ is 14.5 wt%, and the cokes are added at a rate of 3 wt%, dry smelting Pellet production method using a pellet manufacturing apparatus. The method according to claim 15,
A drying process of drying the raw material before the material crushing process; Further comprising,
The drying process is a process for drying for 120 minutes in a dryer at 100 ° C. when the moisture content of the raw material copper-containing sludge is 60%. The method according to claim 15,
The material crushing process is a process of pulverizing the raw materials and subsidiary materials to a particle size of 100 to 325 mesh, a method for producing pellets using a pellet manufacturing apparatus for dry smelting. The method according to claim 15,
The weight of the raw material input by the material input process is 10 kg, the weight of the subsidiary material is 5 kg, and the total water content of the raw material and the subsidiary material is 6 wt%, and the pellet manufacturing method using the pellet manufacturing apparatus for dry smelting. The method according to claim 15,
The caking agent spraying process,
The rate of 10 mL / min so that the water content of the sample containing the raw material and the subsidiary material contained in the mixing tank is dissolved in the caking agent produced by dissolving CMC (carboxymethyl cellulose) in distilled water at a rate of 5 g / L. Pellet manufacturing method using a pellet manufacturing apparatus for dry smelting, which is a process of spraying 600 mL with. The method according to claim 15,
The mixing process is a process performed by rotating the impeller provided inside the mixing tank at a speed of 80 rpm, a pellet manufacturing method using a pellet manufacturing apparatus for dry smelting. The method according to claim 15,
The mixing sample pressing process,
Pellet manufacturing method using a pellet manufacturing apparatus for dry smelting, which is a process of repeatedly pressing the mixed sample transferred to the pressurized space 3 to 5 times using a pressurizing pin interlocking with a hydraulic cylinder controlled at a pressure of 5 tons.

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