Clarification device and extraction equipment using clarification device

Abstract

The utility model relates to the field of hydrometallurgy, in particular to a clarification device and extraction equipment using the clarification device. The clarification device comprises a clarification tank with a tank bottom, a liquid inlet is formed in one end of the clarification tank, a partition plate is arranged above the tank bottom in the clarification tank, the liquid inlet is located below the partition plate, the clarification tank is divided into a bottom clarification tank body and an upper clarification tank body through the partition plate, and a gap is formed between the end, away from the liquid inlet, of the partition plate and the side wall of the clarification tank body. And the liquid in the bottom clarifying tank flows into the upper clarifying tank. Two flow channels are formed in the same clarifying tank by arranging the partition plate; when the liquid flows, the liquid flowing out of the clarifying tank at the bottom can enter the clarifying tank at the upper part and flows reversely, so that the flowing distance of the liquid in the clarifying tank is prolonged, and the phase splitting distance is prolonged; therefore, the problem that in the prior art, when the extraction amount is large, the size of the clarifying tank needs to be increased, so that the clarifying device occupies a large space is solved.

Description

Technical Field

[0001] The utility model relates to the field of hydrometallurgy, in particular to a clarification device and extraction equipment using the clarification device. Background Art

[0002] Hydrometallurgy is a method of bringing ore, or concentrates enriched by beneficiation, or other raw materials into contact with aqueous solutions or other liquids, and transferring the useful solid metals contained in the raw materials into the liquid phase through chemical reactions (i.e. solvent leaching), and then separating and enriching the various useful metals contained in the liquid phase (i.e. extraction), and finally recovering them in the form of metals or other compounds.

[0003] Specifically, the extraction equipment is indispensable in the extraction process. For example, the Chinese utility model patent with the authorization announcement number CN208406170U discloses an extraction tank (i.e., extraction equipment), which includes a mixing chamber (i.e., a stirring device) and a clarification tank (i.e., a clarification device). First, the organic phase composed of a diluent and an extractant and the metal-rich water are mixed in the mixing chamber to obtain a mixed phase, and then the mixed phase flows into the clarification tank through the liquid inlet of the clarification tank and flows in the clarification tank. As the mixed phase flows, the organic phase and the water phase in the mixed phase will separate under the action of the specific gravity difference, completing the phase separation, so that the metal ions in the water phase are transferred to the organic phase to form a loaded organic phase, and the bottom of the organic phase is the water phase. After that, the metal in the loaded organic phase is exchanged to another system through back extraction to complete the metal reduction smelting.

[0004] In the extraction process, most of the design indicators are designed according to 3.5m³ / ㎡ / h. If a large factory is encountered, the clarification tank needs to be lengthened or widened, resulting in a large space occupation and increased construction costs. In addition, during the mixing and stirring process, a certain amount of air will be mixed in the mixed phase. Air is a raw material for producing interphase substances, which will increase entrainment in the process and need to be removed by special equipment in subsequent processes, which is costly and inefficient. Utility Model Content

[0005] The purpose of the utility model is to provide a clarification device for solving the problem in the prior art that when the extraction amount is large, the bottom surface size of the clarification tank needs to be increased, resulting in a large space occupied by the clarification device; the purpose of the utility model is also to provide an extraction equipment for solving the above technical problems.

[0006] In order to achieve the above-mentioned purpose, the clarification device in the utility model adopts the following technical solutions:

[0007] A clarification device comprises a clarification tank with a tank bottom, a liquid inlet is arranged at one end of the clarification tank, a partition is arranged above the tank bottom in the clarification tank, the liquid inlet is located below the partition, the partition divides the clarification tank into a bottom clarification tank and an upper clarification tank, and there is a gap between the end of the partition away from the liquid inlet and the side wall of the clarification tank to form a liquid outlet channel for the liquid in the bottom clarification tank to flow into the upper clarification tank.

[0008] The beneficial effect of the above technical scheme is that: the utility model improves the existing clarification device, and divides the clarification tank into a bottom clarification tank and an upper clarification tank by arranging a partition located above the bottom of the tank, so that there are two flow channels in the same clarification tank; wherein the liquid inlet is located below the partition, and there is a gap between the end of the partition away from the liquid inlet and the side wall of the clarification tank to form a liquid outlet channel for the liquid in the bottom clarification tank to flow into the upper clarification tank, so that when the liquid flows, the liquid needs to flow from the liquid inlet to the end of the bottom clarification tank away from the liquid inlet, and at the same time, the bottom clarification tank and the upper clarification tank can be connected through the gap, so that the liquid flowing out of the bottom clarification tank can enter the upper clarification tank and flow in the opposite direction, so that the flow distance of the liquid in the clarification tank becomes longer, the phase separation distance is increased, and the phase separation time is prolonged, thereby solving the problem in the prior art that the bottom surface size of the clarification tank needs to be increased when the extraction amount is large, resulting in a large space occupied by the clarification device.

[0009] Furthermore, the distance between the partition and the bottom of the tank gradually increases in the direction from the liquid inlet to the distance.

[0010] The beneficial effect of the above technical solution is that the pressure is gradually released, which is conducive to the air inhaled or generated when the two phases are mixed to condense in the gradually enlarged channel and form large bubbles to be discharged, thereby reducing the generation of interphase materials.

[0011] Furthermore, a baffle extending upward is provided at one end of the partition located at the interval.

[0012] The beneficial effect of the above technical solution is that it is easy to separate the aqueous phase and the organic phase, and by setting the baffle, the liquids that have partially completed phase separation flow to their respective paths, thereby avoiding secondary disturbance when the liquid flows from the bottom clarification tank to the upper clarification tank.

[0013] Furthermore, a tubular fence is installed on the partition, the tubular fence has a filtering structure to enhance the clarification effect, and the tubular fence is located in the upper clarification tank.

[0014] The beneficial effects of the above technical solution are: the tubular fence allows impurities on the interface of the upper clarification tank to be removed, and the tubular fence allows the incompletely separated tiny droplets in the two phases to be further separated, which has the effect of strengthening the phase separation.

[0015] Furthermore, the tubular fence includes two rows of grid plates arranged vertically at intervals, the cross-section of the grid plates is arc-shaped, and flow holes for liquid to pass through are provided between each grid plate. The tubular fence also includes a baffle plate sandwiched between the two grid plates.

[0016] The beneficial effect of the above technical solution is that the grid plate does not affect the flow of the liquid, and at the same time can act as a bracket to support and fix the tubular fence. Since the grid plate is arc-shaped, the composite phase that has not been completely separated will produce a micro-rotation when passing through the tubular fence, thereby enhancing the phase separation effect. In addition, the grid plate is located on the liquid surface, which can prevent the floating dirt from flowing to the rear stage.

[0017] Furthermore, the partition is also provided with a slit for only air bubbles to pass through, and the slit is located between two grid sheets of the tubular fence.

[0018] The beneficial effect of the above technical solution is that the bubbles in the bottom clarification tank are released by setting a slit, and because the slit is located between two grid plates, the bubbles can be transmitted to between the two groups of grid plates and discharged from the liquid surface through the space between the grid plates, thereby reducing the disturbance of the liquid at the liquid surface boundary during the rising process of the bubbles.

[0019] In order to achieve the above-mentioned purpose, the extraction equipment in the utility model adopts the following technical scheme:

[0020] An extraction device comprises a mixing chamber and a clarification device, wherein the mixing chamber comprises a liquid outlet channel connected to a liquid inlet of the clarification device, wherein the clarification device comprises a clarification tank having a tank bottom, a liquid inlet is arranged at one end of the clarification tank, a partition is arranged above the tank bottom in the clarification tank, the liquid inlet is located below the partition, the partition divides the clarification tank into a bottom clarification tank and an upper clarification tank, and a gap is provided between the end of the partition away from the liquid inlet and the side wall of the clarification tank to form a liquid outlet channel for the liquid in the bottom clarification tank to flow into the upper clarification tank.

[0021] The beneficial effect of the above technical scheme is that: the utility model improves the existing extraction device, and divides the clarification tank into a bottom clarification tank and an upper clarification tank by setting a partition located above the bottom of the tank, so that there are two flow channels in the same clarification tank; wherein the liquid inlet is located below the partition, and there is a gap between the end of the partition away from the liquid inlet and the side wall of the clarification tank to form a liquid outlet channel for the liquid in the bottom clarification tank to flow into the upper clarification tank, so that when the liquid flows, the liquid needs to flow from the liquid inlet to the end of the bottom clarification tank away from the liquid inlet, and at the same time, the bottom clarification tank and the upper clarification tank can be connected through the gap, so that the liquid flowing out of the bottom clarification tank can enter the upper clarification tank and flow in the opposite direction, so that the flow distance of the liquid in the clarification tank becomes longer, the phase separation distance is increased, and the phase separation time is prolonged, thereby solving the problem in the prior art that when the extraction amount is large, the bottom surface size of the clarification tank needs to be increased, resulting in a large space occupied by the clarification device.

[0022] Furthermore, the distance between the partition and the bottom of the tank gradually increases in the direction from the liquid inlet to the distance.

[0023] The beneficial effect of the above technical solution is that the pressure is gradually released, which is conducive to the air inhaled or generated when the two phases are mixed to condense in the gradually enlarged channel and form large bubbles to be discharged, thereby reducing the generation of interphase materials.

[0024] Furthermore, a baffle extending upward is provided at one end of the partition located at the interval.

[0025] The beneficial effect of the above technical solution is that it is easy to separate the aqueous phase and the organic phase, and by setting the baffle, the liquids that have partially completed phase separation flow to their respective paths, thereby avoiding secondary disturbance when the liquid flows from the bottom clarification tank to the upper clarification tank.

[0026] Furthermore, a tubular fence is installed on the partition, the tubular fence has a filtering structure to enhance the clarification effect, and the tubular fence is located in the upper clarification tank.

[0027] The beneficial effects of the above technical solution are: the tubular fence allows impurities on the interface of the upper clarification tank to be removed, and the tubular fence allows the incompletely separated tiny droplets in the two phases to be further separated, which has the effect of strengthening the phase separation.

[0028] Furthermore, the tubular fence includes two rows of grid plates arranged vertically at intervals, the cross-section of the grid plates is arc-shaped, and flow holes for liquid to pass through are provided between each grid plate. The tubular fence also includes a baffle plate sandwiched between the two grid plates.

[0029] The beneficial effect of the above technical solution is that the grid plate does not affect the flow of the liquid, and at the same time can act as a bracket to support and fix the tubular fence. Since the grid plate is arc-shaped, the composite phase that has not been completely separated will produce a micro-rotation when passing through the tubular fence, thereby enhancing the phase separation effect. In addition, the grid plate is located on the liquid surface, which can prevent the floating dirt from flowing to the rear stage.

[0030] Furthermore, the partition is also provided with a slit for only air bubbles to pass through, and the slit is located between two grid sheets of the tubular fence.

[0031] The beneficial effect of the above technical solution is that the bubbles in the bottom clarification tank are released by setting a slit, and because the slit is located between two grid plates, the bubbles can be transmitted to between the two groups of grid plates and discharged from the liquid surface through the space between the grid plates, thereby reducing the disturbance of the liquid at the liquid surface boundary during the rising process of the bubbles. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of the embodiment 1 of the extraction device of the utility model;

[0033] Figure 2 It is a top view of the embodiment 1 of the extraction device in the utility model;

[0034] Figure 3 It is a schematic diagram of the structure of the tubular fence of Example 1 of the extraction equipment in the utility model.

[0035] In the figure: 1, mixing chamber; 11, lower side plate; 12, upper side plate; 13, top plate; 14, outer side plate; 2, clarification tank; 21, liquid inlet; 22, partition plate; 221, baffle plate; 23, tubular fence; 231, grid plate; 232, upper filter body; 233, lower filter body; 234, arc strip; 24, water phase overflow trough; 241, first L-shaped fixed plate; 25, organic phase overflow trough; 251, second L-shaped fixed plate; 252, vertical plate; 26, upper clarification tank; 27, bottom clarification tank. DETAILED DESCRIPTION

[0036] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0037] In embodiment 1 of the extraction device of the present invention:

[0038] In this embodiment, a partition is arranged in the clarification tank, and the clarification tank is divided into two parts, an upper part and an lower part, by the partition, wherein the bottom clarification tank has a liquid inlet for connecting with the mixing chamber, and the end of the bottom clarification tank away from the mixing chamber is connected to the upper clarification tank, that is, the mixed phase flowing out of the mixing chamber first passes through the bottom clarification tank for preliminary phase separation and then rises to the upper clarification tank, and gradually phases are separated under the action of gravity as it flows in the clarification tank, and then the aqueous phase and the organic phase after the phase separation are collected separately.

[0039] like Figure 1 As shown, the extraction equipment includes a mixing chamber 1 and a clarification device that are interconnected, wherein the mixing chamber 1 includes a body, a stirring paddle and a liquid outlet channel, and the body includes a top plate 13, a bottom plate and surrounding side plates that form a square mixing chamber 1, one of the surrounding side plates is lower than the top plate 13 to form a low side plate 11, and the other three side plates are connected to the top plate 13 to form a high side plate 12, an overflow port is formed between the low side plate 11 and the top plate 13, and an external side plate 14 is fixedly arranged on the top plate 13 outside the low side plate 11, and the external side plate 14 and the low side plate 11 form the guide groove. The stirring paddle is arranged in the body to mix the metal-rich water and organic phase in the mixing chamber 1 to obtain a uniformly mixed phase. As the number of mixed phases increases, the space in the body is insufficient to accommodate all the mixed phases, and the mixed phase will overflow from the overflow port of the mixing chamber 1 and flow into the liquid outlet channel.

[0040] like Figure 1 and Figure 2 As shown, the clarification device includes a clarification tank 2, which includes a tank bottom and a partition 22 arranged above the tank bottom and spaced apart from the tank bottom. The partition 22 divides the clarification tank 2 into an upper clarification tank 26 and a bottom clarification tank 27, wherein the liquid inlet 21 of the clarification tank 2 is arranged below the partition 22, and there is a gap between one end of the partition 22 away from the liquid inlet 21 and the side wall of the clarification tank 2 to form a liquid outlet channel; that is, the liquid inlet 21 is arranged on the bottom clarification tank 27, and the liquid outlet channel is arranged on the other end of the bottom clarification tank 27. When the mixed phase flows, it first passes through the guide groove, flows from the guide groove to the bottom clarification tank 27, and then the liquid in the bottom clarification tank 27 flows into the upper clarification tank 26 through the liquid outlet channel.

[0041] like Figure 1 and Figure 2As shown, the distance between the partition 22 and the bottom of the tank gradually increases from the liquid inlet 21 to the liquid outlet channel, so that the pressure is gradually released, and the bubbles in the mixed phase increase in volume due to the pressure reduction, thereby increasing the buoyancy of the bubbles and making it easier to escape upward. An upwardly extending baffle 221 is provided at one end of the partition 22 located at the interval, and the height of the baffle 221 is roughly flush with the boundary line between the aqueous phase and the organic phase here, so that the aqueous phase and the organic phase that have completed phase separation at the bottom of the partition flow to their respective levels, while avoiding the disturbance of the liquid surface of other parts caused by the liquid in the process of flowing to their respective liquid levels.

[0042] like Figure 1 and Figure 3 As shown, a tubular fence 23 is installed on the partition 22, so that the tubular fence 23 is located in the upper clarification tank 26. The tubular fence 23 includes two vertically spaced grid sheets 231, and each grid sheet 231 is provided with a plurality of flow holes for liquid to pass through. The tubular fence 23 also includes a frame sandwiched between the two grid sheets 231. At the same time, a slit is also provided on the partition 22 between the two grid sheets 231, and the bubbles are collected and transmitted to the square hollow support frame in the middle of the two groups of grids through a semicircular pipe (not shown in the figure) located above the slit, and then discharged after gas-liquid separation. The slit is only for bubbles to pass through, that is, the bubbles in the bottom clarification tank 27 will escape upwards during the flow process, and then flow to the slit, and rise to the liquid surface under the guidance of the partition 231, and then be intercepted by the baffle on the tubular fence 23. Specifically, the tubular fence includes an upper filter body 232 and a lower filter body 233 located between the upper and lower ends of the two grid sheets 231. In addition, the grid sheet 231 of the tubular fence 23 includes two rows of arc-shaped bars 234, and the arc-shaped openings of the two rows of arc-shaped bars 234 are arranged in a staggered manner, so that when the organic phase flows through here, it does not flow along a straight line, but generates a micro-rotation under the action of the two rows of arc-shaped bars 234. Through the micro-rotation, the tiny droplets in the organic phase can be separated in an enhanced manner. The liquid flow here is shown in the Chinese utility model patent with the authorization announcement number CN208964997U, and will not be repeated here.

[0043] like Figure 1As shown, an organic phase overflow tank 25 and a water phase overflow tank 24 are also provided in the upper clarification tank 26. The organic phase overflow tank 25 and the water phase overflow tank 24 have an organic phase outlet and a water phase outlet respectively. Since the organic phase is located above the water phase, the slot of the organic phase overflow tank 25 is higher than the slot of the water phase overflow tank 24. The water phase overflow tank is surrounded by the tank wall of the upper clarification tank 26 near the liquid inlet and the first L-shaped fixing plate 241 fixed on the tank wall; the organic phase overflow tank 25 is surrounded by the second L-shaped fixing plate 251 fixed in the upper clarification tank 26 and the vertical plate 252 connected to the horizontal side of the second L-shaped fixing plate 251. The vertical plate 252 has an extension section that is lower than the horizontal side and extends downward. The vertical side of the second L-shaped fixing plate 251 is higher than the vertical side of the first L-shaped fixing plate 241.

[0044] In the process of hydrometallurgy, first, the aqueous phase rich in metal ions in the mixing chamber 1 will be fully mixed with the extracted organic phase under the action of the stirring paddle, and then overflow into the guide groove. Since the liquid surface in the guide groove has a certain height, the height difference between the liquid flowing out of the mixing chamber 1 and the liquid surface in the guide groove is small, and the bubbles generated by the impact will also be reduced. Then it will gradually flow along the bottom clarification tank 27, and a certain amount of bubbles will be released during the flow process. The bubbles rise to the partition 22 and escape through the slits on the partition 22. After flowing to the end of the bottom clarification tank 27, it will rise under the gravity of the liquid surface of the liquid outlet channel. The liquid surface height here is higher, so the pressure on the liquid will also be reduced. At this time, the gas dissolved in the liquid will escape, and the effect of reducing bubbles will also be produced here. Then in the upper clarification tank 26, the raw materials for generating interphase materials will be reduced under the exhaust action of the tubular fence 23, that is, after passing through the extraction equipment, not only phase separation is achieved, but also impurities and bubbles therein are reduced, entrainment is reduced, the quality of the electrolyte is improved, and the subsequent process is reduced. Moreover, due to the increased clarification time, the two-phase entrainment level is reduced by 50% compared with the traditional single-layer extraction tank.

[0045] In Example 2 of the extraction device in the utility model: Regarding the setting of the mixing chamber, this embodiment proposes a new arrangement form. Different from Example 1, the mixing chamber in this embodiment is a cylindrical mixing chamber with an arc-shaped side surface and an opening on the side surface as an overflow port. At this time, the external side plate is also an arc-shaped plate.

[0046] In the embodiment 3 of the extraction device of the present utility model: for the arrangement of the water phase convergence tank and the organic phase convergence tank, this embodiment proposes a new arrangement form. Different from the embodiment 1, the water phase convergence tank and the organic phase convergence tank in this embodiment are both grooves with U-shaped cross-sections, which are formed by a U-shaped plate fixedly arranged in the upper clarification tank.

[0047] In the embodiment 4 of the extraction device of the utility model: for the setting of the partition, this embodiment proposes a new arrangement. Different from the embodiment 1, in this embodiment, micropores are provided on the partition, and the bubbles of the liquid in the bottom clarification tank are discharged through the micropores. Of course, in other embodiments, no slits or micropores may be provided, and the partition may be an airtight plastic plate or a stainless steel plate.

[0048] In the embodiment 5 of the extraction device of the present invention, a new arrangement is proposed for the setting of the tubular fence. Different from the embodiment 1, in the tubular fence of the present embodiment, two partitions are no longer arranged, but only one vertical plate is arranged, and a filter body is bonded to the vertical plate.

[0049] In the embodiment 6 of the extraction device of the present utility model: for the setting of the clarification device, this embodiment proposes a new arrangement form. Different from the embodiment 1, the tubular fence is no longer provided in this embodiment.

[0050] In the embodiment 7 of the extraction device of the present invention, a new arrangement is proposed for the partition plate. Different from the embodiment 1, the baffle plate extending upward is no longer arranged on the partition plate in the embodiment.

[0051] In the embodiment 8 of the extraction device of the present invention, a new arrangement is proposed for the partition. Different from the embodiment 1, the spacing between the partition and the bottom of the tank is equal, that is, the partition and the bottom of the tank are arranged in parallel.

[0052] In the embodiment 1 of the clarification device of the present invention, the structure of the clarification device in this embodiment is the same as the structure of the clarification device in any embodiment of the above-mentioned extraction equipment, and will not be repeated here.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A clarification device, comprising a clarification tank (2) having a tank bottom, wherein one end of the clarification tank (2) is provided with a liquid inlet (21), characterized in that: A partition (22) is arranged above the bottom of the clarification tank (2), and the liquid inlet (21) is located below the partition (22). The partition (22) divides the clarification tank (2) into a bottom clarification tank (27) and an upper clarification tank (26). An end of the partition (22) away from the liquid inlet (21) is spaced from the side wall of the clarification tank (2) to form a liquid outlet channel for liquid in the bottom clarification tank (27) to flow into the upper clarification tank.

2. The clarification device according to claim 1, characterized in that: The distance between the partition (22) and the bottom of the tank gradually increases in a direction from the liquid inlet (21) to the distance.

3. The clarification device according to claim 1 or 2, characterized in that: One end of the partition plate (22) located at the interval is provided with a baffle plate (221) extending upwards.

4. The clarification device according to claim 1 or 2, characterized in that: A tubular fence (23) is installed on the partition (22). The tubular fence (23) has a filtering structure to enhance the clarification effect. The tubular fence (23) is located in the upper clarification tank.

5. The clarification device according to claim 4, characterized in that: The tubular fence (23) comprises two rows of grid plates (231) arranged vertically at intervals, the cross-section of the grid plates being arc-shaped, and flow holes for liquid to pass through are provided between each grid plate (231). The tubular fence (23) further comprises a baffle plate sandwiched between the two grid plates (231).

6. The clarification device according to claim 5, characterized in that: The partition plate (22) is also provided with a slit for only air bubbles to pass through, and the slit is located between two grid sheets (231) of the tubular fence (23).

7. An extraction device, comprising a mixing chamber (1) and a clarification device, the mixing chamber (1) comprising a liquid outlet channel connected to a liquid inlet (21) of the clarification device, characterized in that: The clarification device is the same as the clarification device described in any one of claims 1-6.

Images