Pyrolysis device for preparing magnesium carbonate from flotation tailings

Abstract

The utility model discloses a pyrolysis device for preparing magnesium carbonate from flotation tailings, which comprises a pyrolysis box, a gas delivery pipe, a plurality of carbon dioxide absorption boxes, a communicating pipe, a gas outlet pipe, a sucking pump and a carbon dioxide collecting tank, the gas delivery pipe communicated with the pyrolysis box is fixed on one side of the pyrolysis box, a first valve is mounted on the gas delivery pipe, the number of the carbon dioxide absorption boxes is multiple, and the communicating pipe is communicated with the gas outlet pipe. The carbon dioxide absorption boxes are connected through a plurality of communicating pipes, the gas conveying pipe is fixedly communicated with the carbon dioxide absorption box closest to the pyrolysis box, the carbon dioxide absorption box farthest from the pyrolysis box is provided with a gas outlet pipe, the carbon dioxide absorption boxes are filled with zeolite, and the gas inlet end of the gas suction pump is provided with a gas inlet pipe connected with the communicating pipes. A gas collecting pipe connected with the carbon dioxide collecting tank is installed at the gas outlet end of the gas extracting pump. According to the magnesite flotation tailing pyrolysis device, magnesite flotation tailings are pyrolyzed conveniently, carbon dioxide obtained through pyrolysis is collected conveniently, emission of greenhouse gas is reduced, and the utilization rate of resources is increased.

Description

Technical Field

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

[0002] Magnesite flotation tailings are often used to produce magnesium carbonate. While magnesium carbonate is the main component of the tailings, it also contains many other impurities, requiring pyrolysis and carbonation reactions to produce pure magnesium carbonate. During tailings pyrolysis, magnesium carbonate decomposes to produce large amounts of carbon dioxide. Existing pyrolysis devices often directly discharge this carbon dioxide, resulting in significant greenhouse gas emissions. Furthermore, the carbonation reaction after pyrolysis requires carbon dioxide as a primary feedstock, leading to resource waste. Therefore, there is an urgent need to develop a pyrolysis device for producing magnesium carbonate from flotation tailings that is convenient for pyrolysis of magnesite flotation tailings, facilitates the collection of carbon dioxide from pyrolysis, reduces greenhouse gas emissions, and improves resource utilization. This would overcome the shortcomings of current applications and meet current needs. Utility Model Content

[0003] The purpose of this invention is to provide a pyrolysis apparatus 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 pyrolysis apparatus for producing magnesium carbonate from flotation tailings includes a pyrolysis tank, a top cover, a gas supply pipe, a carbon dioxide absorption tank, a connecting pipe, a gas outlet pipe, a vacuum pump, and a carbon dioxide collection tank. The top cover is detachably installed on the top of the pyrolysis tank via threads. A gas supply pipe is fixedly connected to one side of the pyrolysis tank and is equipped with a first valve. Multiple carbon dioxide absorption tanks are interconnected via multiple connecting pipes. The gas supply pipe is fixedly connected to the carbon dioxide absorption tank closest to the pyrolysis tank. A gas outlet pipe is installed on the carbon dioxide absorption tank furthest from the pyrolysis tank and is equipped with a second valve. The carbon dioxide absorption tank is filled with zeolite. An inlet pipe connected to the connecting pipe is installed at the inlet end of the vacuum pump, and a gas collection pipe connected to the carbon dioxide collection tank is installed at the outlet end of the vacuum pump. A third valve is installed on the gas collection pipe, and an exhaust port is installed on the right side of the third valve on the gas collection pipe. A fourth valve is installed on the exhaust port.

[0006] Preferably, a pressure gauge is installed on the connecting pipe.

[0007] Preferably, a heat insulation layer is fixed to the inside of the pyrolysis chamber, and a heater and a temperature sensor are installed on the inside of the heat insulation layer.

[0008] Preferably, the top of the carbon dioxide absorption box is detachably mounted with a cover plate by screws, and a sealing gasket is fixed to the lower side of the cover plate, the sealing gasket being in contact with the carbon dioxide absorption box.

[0009] The beneficial effects of this invention are as follows: In the pyrolysis device for producing magnesium carbonate from flotation tailings, the tailings from magnesite flotation are added to the pyrolysis tank, the top cover is closed, and the heater is started to heat and decompose the ore. The carbon dioxide produced during decomposition enters the carbon dioxide absorption tank through the gas supply pipe. The carbon dioxide is adsorbed by the zeolite in the absorption tank, and the remaining gas is discharged through the outlet pipe. After pyrolysis, the first, second, and third valves are closed, and the fourth valve is opened. The air pump is then started to extract air from the connecting pipe and the carbon dioxide absorption tank, and the pressure gauge is observed. Initially, the air pumped out from the exhaust port. When the pressure gauge initially shows a negative pressure in the connecting pipe and the carbon dioxide absorption tank, the third valve is opened and the fourth valve is closed. Under negative pressure, the carbon dioxide adsorbed on the zeolite is discharged. The carbon dioxide is then pumped to a carbon dioxide collection tank for storage. In summary, this invention facilitates the pyrolysis of magnesite flotation tailings and the collection of carbon dioxide obtained from pyrolysis, reducing greenhouse gas emissions and improving resource utilization. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0011] Figure 2 This is a partial structural diagram of the present invention. Figure 1 .

[0012] Figure 3 This is a partial structural diagram of the present invention. Figure 2 .

[0013] Legend:

[0014] 1. Pyrolysis chamber; 101. Insulation layer; 102. Heater; 103. Temperature sensor; 2. Top cover; 3. Gas supply pipe; 301. First valve; 4. Carbon dioxide absorption chamber; 401. Cover plate; 402. Sealing gasket; 5. Connecting pipe; 6. Gas outlet pipe; 601. Second valve; 7. Air pump; 701. Inlet pipe; 702. Gas collection pipe; 703. Third valve; 704. Exhaust port; 705. Fourth valve; 8. Carbon dioxide collection tank; 9. Pressure gauge. Detailed Implementation

[0015] 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.

[0016] Specific implementation examples are given below.

[0017] See Figures 1-3 In this embodiment of the present invention, a pyrolysis device for producing magnesium carbonate from flotation tailings includes a pyrolysis tank 1, a top cover 2, a gas supply pipe 3, a carbon dioxide absorption tank 4, a connecting pipe 5, a gas outlet pipe 6, a vacuum pump 7, and a carbon dioxide collection tank 8. The pyrolysis tank 1, carbon dioxide absorption tank 4, vacuum pump 7, and carbon dioxide collection tank 8 are all located on the ground. The top cover 2 is detachably installed on the top of the pyrolysis tank 1 via threads. A heat insulation layer 101 is fixed to the inner side of the pyrolysis tank 1. A heater 102 and a temperature sensor 103 are installed inside the heat insulation layer 101. The control switch for the heater 102 is installed on the pyrolysis tank 1 (not shown in the figure). A gas supply pipe 3 is fixed to one side of the pyrolysis tank 1 and connected thereto. A first valve 301 is installed on the gas supply pipe 3. Multiple carbon dioxide absorption tanks 4 are included. The carbon dioxide absorption boxes 4 are interconnected by multiple connecting pipes 5. The gas supply pipe 3 is fixedly connected to the carbon dioxide absorption box 4 closest to the pyrolysis box 1. An outlet pipe 6 is installed on the carbon dioxide absorption box 4 furthest from the pyrolysis box 1. A second valve 601 is installed on the outlet pipe 6. The carbon dioxide absorption box 4 is filled with zeolite, which is used to adsorb carbon dioxide. An inlet pipe 701 connected to the connecting pipe 5 is installed at the inlet end of the vacuum pump 7. A gas collecting pipe 702 connected to the carbon dioxide collection tank 8 is installed at the outlet end of the vacuum pump 7. A third valve 703 is installed on the gas collecting pipe 702. An exhaust port 704 is installed on the right side of the third valve 703 on the gas collecting pipe 702. A fourth valve 705 is installed on the exhaust port 704. A pressure gauge 9 is installed on the connecting pipe 5.

[0018] The top of the carbon dioxide absorption box 4 is detachably mounted with a cover plate 401 by screws. A sealing gasket 402 is fixed on the lower side of the cover plate 401, and the sealing gasket 402 is in contact with the carbon dioxide absorption box 4.

[0019] Working principle: This pyrolysis device for producing magnesium carbonate from flotation tailings is used by adding the tailings obtained from magnesite flotation into the pyrolysis tank 1, then covering it with the top cover 2, and starting the heater 102 to heat and decompose the ore. The carbon dioxide produced during decomposition enters the carbon dioxide absorption tank 4 through the gas supply pipe 3, where it is adsorbed by the zeolite. The remaining gas is discharged through the gas outlet pipe 6. After pyrolysis, the first valve 301, the second valve 601, and the third valve 703 are closed, and the fourth valve 705 is opened. Then, the air pump 7 is started to extract the air from the connecting pipe 5 and the carbon dioxide absorption tank 4, and the pressure gauge 9 is observed. In the initial stage, the air extracted by the air pump 7 is discharged from the exhaust port 704. When the pressure gauge 9 initially observes a negative pressure in the connecting pipe 5 and the carbon dioxide absorption tank 4, the third valve 703 is opened and the fourth valve 705 is closed. Under negative pressure, the carbon dioxide adsorbed on the zeolite is discharged outward, and the carbon dioxide is extracted by the air pump 7 and transported to the carbon dioxide collection tank 8 for storage.

[0020] 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.

[0021] 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 pyrolysis apparatus for producing magnesium carbonate from a flotation tailings, characterized by, The system includes a pyrolysis chamber (1), a top cover (2), a gas supply pipe (3), a carbon dioxide absorption chamber (4), a connecting pipe (5), a gas outlet pipe (6), a vacuum pump (7), and a carbon dioxide collection tank (8). The top cover (2) is detachably installed on the top of the pyrolysis chamber (1) via threads. A gas supply pipe (3) is fixedly connected to one side of the pyrolysis chamber (1), and a first valve (301) is installed on the gas supply pipe (3). There are multiple carbon dioxide absorption chambers (4), which are interconnected by multiple connecting pipes (5). The gas supply pipe (3) is fixedly connected to the carbon dioxide absorption chamber (4) closest to the pyrolysis chamber (1). An outlet pipe (6) is installed on the carbon dioxide absorption tank (4) furthest from the pyrolysis tank (1). A second valve (601) is installed on the outlet pipe (6). The carbon dioxide absorption tank (4) is filled with zeolite. An inlet pipe (701) connected to a connecting pipe (5) is installed at the inlet end of the vacuum pump (7). A gas collecting pipe (702) connected to a carbon dioxide collection tank (8) is installed at the outlet end of the vacuum pump (7). A third valve (703) is installed on the gas collecting pipe (702). An exhaust port (704) is installed on the right side of the third valve (703) on the gas collecting pipe (702). A fourth valve (705) is installed on the exhaust port (704).

2. The pyrolysis plant for producing magnesium carbonate from floatation tailings according to claim 1, characterized in that, A pressure gauge (9) is installed on the connecting pipe (5).

3. The pyrolysis plant for producing magnesium carbonate from floatation tailings as claimed in claim 1 wherein, The pyrolysis box (1) has an insulation layer (101) fixed inside, and a heater (102) and a temperature sensor (103) are installed inside the insulation layer (101).

4. The pyrolysis plant for producing magnesium carbonate from floatation tailings as claimed in claim 1 wherein, The top of the carbon dioxide absorption box (4) is detachably mounted with a cover plate (401) by screws. A sealing gasket (402) is fixed on the lower side of the cover plate (401), and the sealing gasket (402) is in contact with the carbon dioxide absorption box (4).

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