High-alkalinity red mud dealkalization temperature-control stirring equipment
By setting up heating components and stirring components in the red mud dealizate and temperature-controlled stirring equipment and using a thermal insulation layer, the problem of uneven heating of red mud is solved, and efficient dealizate of red mud is achieved.
Patent Information
- Application Number
- CN202421192813.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-05-29
AI Technical Summary
The prior art cannot achieve uniform heating of red mud during the heating and stirring of red mud, resulting in low alkali removal efficiency.
A highly alkaline red mud dealking and temperature-controlled stirring device is designed. By setting a heating assembly on the inner side of the heating inner barrel and the outer side of the mixing barrel, and a stirring assembly and a thermal insulation layer are provided between the two, uniform heating and stirring of the red mud is achieved.
By uniformly heating the red mud, the equipment improves the adequacy of the decaling reaction, effectively reduces the sodium oxide content, and improves the decaling efficiency of the red mud.
Smart Images
Figure CN222556768U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of red mud dealkalization, and in particular relates to a high-alkalinity red mud dealkalization temperature-controlled stirring device. Background Art
[0002] Red mud is the polluting waste residue discharged when the aluminum industry extracts alumina. Generally, for every ton of alumina produced, 1.0-2.0 tons of red mud are produced. As the world's fourth largest alumina producer, China discharges millions of tons of red mud every year, so it is necessary to make comprehensive use of red mud. Since red mud contains a large amount of strongly alkaline chemicals, its pH value is still 11.25-11.50 (the original soil is above 12) after being diluted 10 times. The extremely high pH value determines the strong corrosiveness of red mud to organisms, metals and siliceous materials. Therefore, it is necessary to dealkalize the red mud. Most of the sodium oxide can be removed by soaking the red mud in magnesium chloride to remove sodium. The sodium oxide content can be reduced to 0.13% under heating and stirring.
[0003] However, in the prior art, when the red mud is heated and stirred, the red mud needs to be heated, but during heating, usually only one surface is heated, which results in the red mud not being heated uniformly, and the alkali cannot be removed efficiently. Utility Model Content
[0004] In view of the problems raised by the above background technology, the purpose of the utility model is to provide a high-alkalinity red mud dealkalization temperature control and stirring equipment to solve the problems raised by the above background technology.
[0005] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:
[0006] A highly alkaline red mud dealkalization temperature-controlled stirring device comprises a mixing barrel, a heating inner barrel is assembled and connected in the middle of the mixing barrel, a heating assembly is arranged on the inner side of the heating inner barrel and the outer side of the mixing barrel, a heat insulation layer is arranged on the outer side of the mixing barrel, a stirring assembly is arranged between the mixing barrel and the heating inner barrel, and a material inlet and a material outlet are arranged on the upper part and the bottom part of the mixing barrel respectively;
[0007] A circular baffle is fixedly connected to the upper portion of the mixing barrel, the feed inlet is located above the circular baffle, and the heating inner barrel is located below the circular baffle.
[0008] Preferably, the heating component is an electric heating wire, and the electric heating wires provided on the inner side of the heating inner barrel and the outer side of the mixing barrel both spirally rise from the bottom to the top, the electric heating wires are fixedly connected to the heating inner barrel and the mixing barrel, and the electric heating wires are electrically connected to a power source.
[0009] Preferably, the stirring assembly includes a rotating disk, which is slidably connected between the circular baffle and the heating inner barrel, a plurality of connecting shafts are fixedly connected below the rotating disk, a plurality of stirring bars are connected to the connecting shafts in a vertical array, and the rotating disk is transmission-connected with a transmission mechanism.
[0010] Preferably, the transmission mechanism includes a motor and a rotating shaft, the motor output shaft is transmission-connected to the rotating shaft, the rotating disk is fixedly assembled above the rotating shaft, the rotating shaft is located in the middle of the heating inner barrel, the lower end of the rotating shaft is rotationally assembled with the bottom of the mixing barrel, and the motor is assembled and connected above the circular baffle.
[0011] Preferably, the number of the rotating shafts is four, the four rotating shafts are evenly arranged in a ring, and the stirring bars of two adjacent rotating shafts are staggered.
[0012] Preferably, the discharge port is arranged at the bottom of the mixing barrel, and the bottom of the mixing barrel is provided with a plurality of discharge grooves in a circular array on the outer circle of the heating inner barrel. The discharge port is connected to the mixing barrel and has an isosceles triangle cross-section. The discharge port is equipped with a discharge valve.
[0013] Preferably, a material guide cone located in the material discharge port is fixedly connected directly below the heating inner barrel.
[0014] Compared with the prior art, the utility model has the following advantages:
[0015] The utility model evenly heats the red mud between the mixing barrel and the heating inner barrel by arranging the heating components inside the heating inner barrel and outside the mixing barrel, so that the red mud is evenly heated and the situation that part of the red mud is heated to a very high temperature while the other part is not heated will not occur.
[0016] The utility model effectively reduces the heat loss through the design of the heat insulation layer, and simultaneously avoids the heating component from being directly exposed to the outside, thereby improving the safety of operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;
[0018] Figure 1 This is a structural schematic diagram of an embodiment of a highly alkaline red mud dealkalization temperature-controlled stirring device of the utility model;
[0019] Figure 2 This is a cross-sectional view of the middle part of a temperature-controlled stirring device for dealkalizing highly alkaline red mud according to the utility model;
[0020] Figure 3 This is a schematic diagram of the structure of the stirring assembly of the utility model;
[0021] Figure 4It is a cross-sectional view of the mixing barrel assembly of the utility model;
[0022] The main component symbols are described as follows:
[0023] Mixing barrel 1, heating inner barrel 12, heating assembly 13, electric heating wire 131, heat insulation layer 14, inlet 15, outlet 16, outlet trough 161, outlet valve 162, guide cone 163, circular baffle 17;
[0024] Stirring assembly 2, rotating disk 201, connecting shaft 202, stirring bar 203;
[0025] Transmission mechanism 24 , motor 241 , rotating shaft 242 . DETAILED DESCRIPTION
[0026] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.
[0027] like Figure 1-4 As shown, a highly alkaline red mud dealkalization temperature-controlled stirring device comprises a mixing barrel 1, a heating inner barrel 12 is assembled and connected in the middle of the mixing barrel 1, a heating component 13 is arranged on the inner side of the heating inner barrel 12 and the outer side of the mixing barrel 1, a heat insulation layer 14 is arranged on the outer side of the mixing barrel 1, a stirring component 2 is arranged between the mixing barrel 1 and the heating inner barrel 12, and a material inlet 15 and a material outlet 16 are arranged on the upper part and the bottom part of the mixing barrel 1 respectively;
[0028] A circular baffle 17 is fixedly connected to the upper portion of the mixing barrel 1 , the feed inlet 15 is located above the circular baffle 17 , and the heating inner barrel 12 is located below the circular baffle 17 .
[0029] According to the technical solution of this embodiment, the heating component 13 is used to heat the inner side of the heating inner barrel 12 and the outer side of the mixing barrel 1, so that the red mud located on the inner side of the heating inner barrel 12 and the outer side of the mixing barrel 1 is heated evenly, thereby preventing one part of the red mud from being heated while the other part is not heated. The heat insulation layer 14 is used to prevent the heat energy of the mixing barrel 1 from being dissipated to the outside, thereby reducing heat loss. The stirring component 2 is used to stir the red mud. The red mud raw material enters the mixing barrel 1 from the feed port 15, and the red mud raw material after the reaction is discharged from the discharge port 16. The circular baffle 17 blocks the top of the mixing barrel 1 to reduce heat loss.
[0030] Reference Figure 2 and 4 The heating component 13 is an electric heating wire 131. The electric heating wire 131 provided on the inner side of the heating inner barrel 12 and the outer side of the mixing barrel 1 both spirally rises from the bottom to the top. The electric heating wire 131 is fixedly connected to the heating inner barrel 12 and the mixing barrel 1, and the electric heating wire 131 is electrically connected to a power source.
[0031] In this embodiment, the heating component 13 is used to heat the heating inner barrel 12 and the mixing barrel 1. The red mud raw material is located between the heating inner barrel 12 and the mixing barrel 1. The heating component 13 heats the inner and outer sides of the red mud raw material at the same time to ensure that the red mud raw material is heated evenly, thereby making the red mud dealkalization reaction more complete. The heating inner barrel 12 and the mixing barrel 1 are both heat-conducting materials, which can fully transfer the heat generated by the heating wire 131 to the red mud raw material. At the same time, the heating wire 131 rises in a spiral and is evenly contacted with the heating inner barrel 12 and the mixing barrel 1.
[0032] Reference Figure 3 The stirring assembly 2 includes a rotating disk 201, which is slidably connected between the circular baffle 17 and the heating inner barrel 12. A plurality of connecting shafts 202 are fixedly connected below the rotating disk 201. The connecting shafts 202 are vertically arrayed with a plurality of stirring bars 203. The rotating disk 201 is transmission-connected with a transmission mechanism 24.
[0033] In this embodiment, the transmission mechanism 24 drives the rotating disk 201 to rotate, and the rotating disk 201 is used to drive the connecting shaft 202 to rotate. The connecting shaft 202 rotates around the heating inner barrel 12, and the vertical array of stirring bars 203 stirs the red mud and magnesium oxide. The stirring bars 203 are slidingly connected to the heating inner barrel 12 and the mixing barrel 1, and the ends of the stirring bars 203 scrape off the red mud raw materials adhering to the side walls of the heating inner barrel 12 and the mixing barrel.
[0034] Reference Figure 3 The transmission mechanism 24 includes a motor 241 and a rotating shaft 242. The output shaft of the motor 241 is transmission-connected to the rotating shaft 242. The rotating disk 201 is fixedly assembled above the rotating shaft 242. The rotating shaft 242 is located in the middle of the heating inner barrel 12. The lower end of the rotating shaft 242 is rotationally assembled and connected to the bottom of the mixing barrel 1. The motor 241 is assembled and connected above the circular baffle 17.
[0035] In this embodiment, the motor 241 drives the rotating shaft 242 to rotate, and the rotating shaft 242 drives the rotating disk 201 to rotate.
[0036] Reference Figure 3 : There are four rotating shafts 242 , which are evenly arranged in a ring shape, and the stirring bars 203 of two adjacent rotating shafts 242 are staggered.
[0037] In this embodiment, the stirring bars 203 are staggered to allow the side walls of the mixing barrel 1 and the heating inner barrel 12 to contact the stirring bars 203, while making the reaction between the red mud and the magnesium chloride more complete, thereby reducing the content of sodium oxide and effectively dealkalizing the red mud.
[0038] Reference Figure 2 and 4The discharge port 16 is arranged at the bottom of the mixing barrel 1. The bottom of the mixing barrel 1 is provided with a plurality of discharge grooves 161 in an annular array on the outer ring of the heating inner barrel 12. The discharge port 16 is connected to the mixing barrel 1 and has an isosceles triangle cross section. The discharge port 16 is equipped with a discharge valve 162.
[0039] In this embodiment, the red mud mixture after stirring is discharged from the discharge port 16 , and the discharge valve 162 is used to control whether the discharge port 16 is discharging.
[0040] Reference Figure 4 A material guide cone 163 located in the material outlet 16 is fixedly connected directly below the heating inner barrel 12 .
[0041] In this embodiment, the guide cone 163 is used to reduce the space in the discharge port 16 and guide the red mud discharged from the discharge trough 161.
[0042] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.
[0043] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.
Claims
1. A highly alkaline red mud dealkalization temperature control stirring equipment, characterized in that: The mixing barrel (1) comprises a mixing barrel (1), wherein a heating inner barrel (12) is connected to the middle of the mixing barrel (1), a heating assembly (13) is provided on the inner side of the heating inner barrel (12) and the outer side of the mixing barrel (1), a heat insulation layer (14) is provided on the outer side of the mixing barrel (1), a stirring assembly (2) is provided between the mixing barrel (1) and the heating inner barrel (12), and a material inlet (15) and a material outlet (16) are provided on the top and bottom of the mixing barrel (1), respectively; A circular baffle (17) is fixedly connected to the upper portion of the mixing barrel (1), the feed inlet (15) is located above the circular baffle (17), and the heating inner barrel (12) is located below the circular baffle (17).
2. A highly alkaline red mud dealkalization temperature-controlled stirring device according to claim 1, characterized in that: The heating component (13) is an electric heating wire (131). The electric heating wire (131) provided on the inner side of the heating inner barrel (12) and the outer side of the mixing barrel (1) both spirally rises from the bottom to the top. The electric heating wire (131) is fixedly connected to the heating inner barrel (12) and the mixing barrel (1), and the electric heating wire (131) is electrically connected to a power source.
3. A highly alkaline red mud dealkalization temperature-controlled stirring device according to claim 1, characterized in that: The stirring assembly (2) comprises a rotating disk (201), the rotating disk (201) being slidably connected between the circular baffle (17) and the heating inner barrel (12), a plurality of connecting shafts (202) being fixedly connected below the rotating disk (201), a plurality of stirring bars (203) being connected to the connecting shafts (202) in a vertical array, and the rotating disk (201) being transmission-connected to a transmission mechanism (24).
4. A highly alkaline red mud dealkalization temperature-controlled stirring device according to claim 3, characterized in that: The transmission mechanism (24) comprises a motor (241) and a rotating shaft (242); the output shaft of the motor (241) is transmission-connected to the rotating shaft (242); the rotating disk (201) is fixedly mounted above the rotating shaft (242); the rotating shaft (242) is located in the middle of the heating inner barrel (12); the lower end of the rotating shaft (242) is rotationally mounted and connected to the bottom of the mixing barrel (1); and the motor (241) is mounted and connected above the circular baffle (17).
5. A highly alkaline red mud dealkalization temperature-controlled stirring device according to claim 4, characterized in that: The number of the rotating shafts (242) is four, the four rotating shafts (242) are evenly arranged in a ring, and the stirring bars (203) of two adjacent rotating shafts (242) are staggered.
6. The high alkalinity red mud dealkalization temperature control stirring equipment according to claim 1, characterized in that: The discharge port (16) is arranged at the bottom of the mixing barrel (1), and the bottom of the mixing barrel (1) is provided with a plurality of discharge grooves (161) in a circular array on the outer ring of the heating inner barrel (12). The discharge port (16) is connected to the mixing barrel (1) and has an isosceles triangle cross section. The discharge port (16) is equipped with a discharge valve (162).
7. A highly alkaline red mud dealkalization temperature-controlled stirring device according to claim 6, characterized in that: A material guide cone (163) located in the material discharge port (16) is fixedly connected directly below the heating inner barrel (12).