Carbonization device for preparing magnesium carbonate from flotation tailings

Abstract

The utility model discloses a carbonization device for preparing magnesium carbonate from flotation tailings, which comprises a carbonization reaction box, a stirring shaft is rotatably connected with the carbonization reaction box, a turbine paddle is fixed on the upper half section of the stirring shaft, an anchor paddle is fixed on the lower half section of the stirring shaft, and an exhaust mechanism comprises a cross pipe frame, an annular pipe and an air outlet. The cross pipe frame is fixed at the bottom of the stirring shaft, the cross pipe frame is fixed and communicated with the annular pipe, a plurality of air outlets are formed in the annular pipe, the cross pipe frame penetrates through the carbonization reaction box and is rotationally connected with the carbonization reaction box, an air inlet pipe connected with a carbon dioxide storage tank is installed at the inlet end of the conveying pump, and an output pipe is fixed at the outlet end of the conveying pump; the lower end of the cross-shaped pipe frame is inserted into the output pipe and rotationally connected with the output pipe, a heater is installed in the carbonization reaction box, and the rotary driving mechanism is installed at the top of the carbonization reaction box and used for driving the stirring shaft to rotate. According to the utility model, carbon dioxide and magnesium hydroxide are fully mixed and contacted, and the reaction efficiency is higher.

Description

A carbonation device for producing magnesium carbonate from flotation tailings Technical Field

[0001] This utility model relates to the field of magnesium carbonate production technology, and in particular to a carbonation device for producing magnesium carbonate from flotation tailings. Background Technology

[0002] Magnesium carbonate can be produced from flotation tailings through processes such as pyrolysis and carbonation. In the carbonation reaction, magnesium oxide obtained from pyrolysis is first reacted with water to produce magnesium hydroxide. Then, carbon dioxide is introduced into the magnesium hydroxide slurry for further reaction, followed by heating and decomposition to produce magnesium carbonate. However, existing carbonation reactors use traditional stirring methods, which, due to the high density of magnesium hydroxide, easily lead to sedimentation at the bottom of the slurry and insufficient gas-liquid mixing at the top, significantly reducing reaction efficiency. Therefore, there is an urgent need to develop a carbonation reactor for producing magnesium carbonate from flotation tailings that ensures sufficient mixing and contact between carbon dioxide and magnesium hydroxide, resulting in higher reaction efficiency. This would overcome the shortcomings of current applications and meet current needs. Summary of the Invention

[0003] The purpose of this invention is to provide a carbonation device for producing magnesium carbonate from flotation tailings, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A carbonation device for producing magnesium carbonate from flotation tailings includes a carbonation reaction chamber, a carbon dioxide storage tank, a delivery pump, a stirring shaft, a rotary drive mechanism, and an exhaust mechanism. The stirring shaft is rotatably connected to the carbonation reaction chamber. A turbine propeller is fixed to the upper half of the stirring shaft, and an anchor propeller is fixed to the lower half of the stirring shaft. The exhaust mechanism includes a cross-shaped tube frame, an annular pipe, and an exhaust port. The cross-shaped tube frame is fixed to the bottom of the stirring shaft and is fixed to and communicates with the annular pipe. Multiple exhaust ports are provided on the annular pipe. The cross-shaped tube frame passes through the carbonation reaction chamber and is rotatably connected to it. An inlet pipe connected to the carbon dioxide storage tank is installed at the inlet end of the delivery pump, and an outlet pipe is fixed at the outlet end of the delivery pump. The lower end of the cross-shaped tube frame is inserted into the outlet pipe and rotatably connected to it. A heater is installed inside the carbonation reaction chamber. The rotary drive mechanism is installed at the top of the carbonation reaction chamber and is used to drive the stirring shaft to rotate.

[0006] Preferably, the carbonization reaction chamber has a feed inlet at the top, a top cover that can be detachably installed on the feed inlet, a discharge port at the bottom of the carbonization reaction chamber, a valve installed on the discharge port, and an air vent at the top of the carbonization reaction chamber.

[0007] Preferably, a one-way valve is installed at the lower end of the cross tube frame.

[0008] Preferably, the rotary drive mechanism includes a motor, a first gear, and a second gear. The motor is fixed to the top of the carbonization reaction chamber, the first gear is fixed on the output shaft of the motor, and a second gear meshing with the first gear is provided on one side of the first gear. The second gear is fixed on the stirring shaft.

[0009] The beneficial effects of this utility model are as follows: In the carbonation device for producing magnesium carbonate from flotation tailings, magnesium oxide and water are added to the carbonation reaction tank to react and generate magnesium hydroxide. Then, carbon dioxide is drawn from the carbon dioxide storage tank by a transfer pump and transported to the cross tube frame and annular tube. The carbon dioxide is then discharged from multiple outlets into the carbonation reaction tank to react with the magnesium hydroxide slurry to obtain magnesium bicarbonate. The heater is then activated for heating and decomposition to obtain magnesium carbonate. Simultaneously, a motor drives the first and second gears to rotate, which in turn drives the stirring shaft. The stirring shaft, in turn, drives the anchor paddle, turbine paddle, and exhaust mechanism to rotate. The exhaust mechanism disperses the carbon dioxide throughout the carbonation reaction tank. When the anchor paddle rotates, the fluid flows primarily in a horizontal radial direction, with the blades pushing the material along the tank wall to diffuse outwards. The overall axial flow is relatively weak. When the turbine paddle rotates, the fluid is discharged at high speed radially, impacting the container wall and splitting into two secondary flows, one upward and one downward, forming a certain axial circulation. This ensures more thorough contact between the carbon dioxide and magnesium hydroxide, improving reaction efficiency. In summary, this invention ensures sufficient mixing and contact between carbon dioxide and magnesium hydroxide, resulting in higher reaction efficiency. Attached Figure Description

[0010] Figure 1 is a three-dimensional structural diagram of this utility model.

[0011] Figure 2 is an internal sectional view of this utility model.

[0012] Figure 3 is a partial structural schematic diagram of this utility model.

[0013] Figure 4 is a partial structural schematic diagram of this utility model.

[0014] Legend:

[0015] 1. Carbonization reaction chamber; 101. Feed inlet; 102. Top cover; 103. Discharge outlet; 104. Valve; 105. Vent; 2. Carbon dioxide storage tank; 3. Transfer pump; 301. Inlet pipe; 302. Outlet pipe; 4. Stirring shaft; 401. Anchor paddle; 402. Turbine paddle; 5. Rotary drive mechanism; 501. Motor; 502. First gear; 503. Second gear; 6. Exhaust mechanism; 601. Cross tube frame; 6011. Check valve; 602. Annular pipe; 603. Outlet; 7. Heater. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] Specific implementation examples are given below.

[0018] Referring to Figures 1-4, in this embodiment of the present invention, a carbonation device for producing magnesium carbonate from flotation tailings includes a carbonation reaction chamber 1, a carbon dioxide storage tank 2, a conveying pump 3, a stirring shaft 4, a rotary drive mechanism 5, and an exhaust mechanism 6. The carbonation reaction chamber 1, the carbon dioxide storage tank 2, and the conveying pump 3 are all fixed to the ground. The top of the carbonation reaction chamber 1 is provided with a feed inlet 101, and a top cover 102 is detachably installed on the feed inlet 101. The lower end of the carbonation reaction chamber 1 is provided with a discharge port 103, and a valve 10 is installed on the discharge port 103. 4. The top of the carbonization reaction chamber 1 is provided with an air hole 105. The stirring shaft 4 is rotatably connected to the carbonization reaction chamber 1. The upper half of the stirring shaft 4 is fixed with a turbine propeller 402, and the lower half of the stirring shaft 4 is fixed with an anchor propeller 401. When the anchor propeller 401 rotates, the fluid mainly flows horizontally radially. The propeller blades push the material to diffuse along the tank wall in all directions, and the overall axial flow is relatively weak. When the turbine propeller 402 rotates, the fluid is discharged radially at high speed. After impacting the container wall, it is divided into two secondary flows, one upward and one downward, forming a certain axial circulation, thereby making the fluid mixing more uniform. The exhaust mechanism 6 includes a cross tube frame 601, an annular pipe 602, and an exhaust port 603. The cross tube frame 601 is fixed to the bottom of the stirring shaft 4. The cross tube frame 601 is fixed to and connected to the annular pipe 602. The annular pipe 602 is provided with multiple exhaust ports 603. The cross tube frame 601 passes through the carbonization reaction chamber 1 and is rotatably connected to it. A sealing ring (not shown) is provided at the connection between the cross tube frame 601 and the carbonization reaction chamber 1 to prevent water leakage. The inlet end of the delivery pump 3 is equipped with an air inlet pipe 301 connected to the carbon dioxide storage tank 2. The outlet end of the delivery pump 3 is fixed with an output pipe 302. The lower end of the cross tube frame 601 is inserted into the output pipe 302 and rotatably connected to it. A sealing ring (not shown) is provided at the connection between the cross tube frame 601 and the output pipe 302 to prevent air leakage. A one-way valve 6011 is installed at the lower end of the cross tube frame 601. Through the setting of the one-way valve 6011, the gas in the output pipe 302 can pass through the one-way valve 6011 and enter the cross tube frame 601, while the fluid in the cross tube frame 601 cannot pass through the one-way valve 6011 and enter the output pipe 302.

[0019] The rotary drive mechanism 5 is installed on the top of the carbonization reaction chamber 1 and is used to drive the stirring shaft 4 to rotate. The rotary drive mechanism 5 includes: a motor 501, a first gear 502 and a second gear 503. The motor 501 is fixed on the top of the carbonization reaction chamber 1. The first gear 502 is fixed on the output shaft of the motor 501. A second gear 503 is provided on one side of the first gear 502 and meshes with it. The second gear 503 is fixed on the stirring shaft 4. In use, the motor 501 drives the first gear 502 and the second gear 503 to rotate, and the second gear 503 drives the stirring shaft 4 to rotate.

[0020] A heater 7 is installed inside the carbonization reaction chamber 1.

[0021] Working principle: This carbonation device for producing magnesium carbonate from flotation tailings operates by adding magnesium oxide and water to the carbonation reaction tank 1 to react and generate magnesium hydroxide. Then, carbon dioxide is drawn from the carbon dioxide storage tank 2 by the transfer pump 3 and transported to the cross tube frame 601 and the annular tube 602. The carbon dioxide is then discharged from multiple outlets 603 back into the carbonation reaction tank 1 to react with the magnesium hydroxide slurry, producing magnesium bicarbonate. The heater 7 is then activated for heating and decomposition, yielding magnesium carbonate. Simultaneously, the motor 501 drives the first gear 502 and the second gear 503 to rotate, and the second gear... 503 drives the stirring shaft 4 to rotate, which in turn drives the anchor paddle 401, turbine paddle 402, and exhaust mechanism 6 to rotate. The exhaust mechanism 6 rotates to fully disperse carbon dioxide throughout the carbonization reaction chamber 1. When the anchor paddle 401 rotates, the fluid mainly flows horizontally radially, and the paddle blades push the material to diffuse along the tank wall in all directions. The overall axial flow is relatively weak. When the turbine paddle 402 rotates, the fluid is discharged radially at high speed. After impacting the container wall, it is divided into two secondary flows, one upward and one downward, forming a certain axial circulation. This makes the contact between carbon dioxide and magnesium hydroxide more complete and improves the reaction efficiency.

[0022] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A carbonation apparatus for producing magnesium carbonate from flotation tailings, characterized in that, The system includes a carbonization reaction chamber (1), a carbon dioxide storage tank (2), a delivery pump (3), a stirring shaft (4), a rotary drive mechanism (5), and an exhaust mechanism (6). The stirring shaft (4) is rotatably connected to the carbonization reaction chamber (1). A turbine propeller (402) is fixed to the upper half of the stirring shaft (4), and an anchor propeller (401) is fixed to the lower half of the stirring shaft (4). The exhaust mechanism (6) includes a cross tube frame (601), an annular pipe (602), and an exhaust port (603). The cross tube frame (601) is fixed to the bottom of the stirring shaft (4), and the cross tube frame (601) is fixed to the annular pipe (602). The annular tube (602) is connected to the carbonization reaction chamber (1) and has multiple air outlets (603). The cross tube frame (601) passes through the carbonization reaction chamber (1) and is rotatably connected to it. The inlet end of the delivery pump (3) is equipped with an air inlet pipe (301) connected to the carbon dioxide storage tank (2). The outlet end of the delivery pump (3) is fixed with an output pipe (302). The lower end of the cross tube frame (601) is inserted into the output pipe (302) and is rotatably connected to it. A heater (7) is installed inside the carbonization reaction chamber (1). The rotary drive mechanism (5) is installed on the top of the carbonization reaction chamber (1) and is used to drive the stirring shaft (4) to rotate.

2. The carbonation apparatus for producing magnesium carbonate from flotation tailings according to claim 1, characterized in that, The carbonization reaction chamber (1) is provided with a feed inlet (101) at the top, and a top cover (102) is detachably installed on the feed inlet (101). The carbonization reaction chamber (1) is provided with a discharge port (103) at the bottom, and a valve (104) is installed on the discharge port (103). The carbonization reaction chamber (1) is provided with an air hole (105) at the top.

3. The carbonation apparatus for producing magnesium carbonate from flotation tailings according to claim 1, characterized in that, A one-way valve (6011) is installed at the lower end of the cross tube frame (601).

4. The carbonation apparatus for producing magnesium carbonate from flotation tailings according to claim 1, characterized in that, The rotary drive mechanism (5) includes: a motor (501), a first gear (502) and a second gear (503). The motor (501) is fixed to the top of the carbonization reaction chamber (1). The first gear (502) is fixed on the output shaft of the motor (501). A second gear (503) meshes with the first gear (502) on one side. The second gear (503) is fixed on the stirring shaft (4).

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