Rotary kiln for refining metal zinc

Abstract

The utility model provides a rotary kiln for refining metal zinc, and relates to the technical field of non-ferrous metal smelting equipment. The utility model comprises a kiln body, a treatment box body and a preheating structure, the preheating structure comprises a heat conduction structure and a heating structure, the heating structure comprises an air inlet structure and an air outlet structure, and the air inlet structure comprises an air inlet box, an air inlet fan and a heating box. The heat conduction structure comprises a first heat conduction structure, a second heat conduction structure, a third heat conduction structure and a fourth heat conduction structure. A group of ventilation structures with hot air and four groups of heat conduction structures with a heating effect are arranged, the hot air at one end of the treatment box body is introduced into the treatment box body, and the four groups of heat conduction structures in the middle of the treatment box body are matched to increase the temperature in the treatment box body; and finally, the hot air is exhausted through an air outlet structure at the other end of the treatment box body, so that the preheating effect on the materials in the treatment box body is ensured.

Description

Technical Field

[0001] This utility model relates to the field of non-ferrous metal smelting equipment technology, and in particular to a rotary kiln for refining metallic zinc. Background Technology

[0002] The zinc slag rotary kiln is a core piece of equipment in non-ferrous metal smelting. It is specifically designed to process zinc-containing waste slag (such as zinc leaching slag, electric furnace dust, galvanizing ash, etc.) and achieves efficient recovery and resource utilization of zinc metal through high-temperature reduction and volatilization.

[0003] Zinc slag rotary kilns, through a high-temperature reduction volatilization-condensation recovery mechanism, undertake three major missions in the secondary zinc resource recovery:

[0004] 1. Economic efficiency: Efficient extraction of zinc metal from low-grade waste residue (cost per ton of zinc is 35% lower than that of primary zinc);

[0005] 2. Environmental friendliness: Solidifies heavy metals, achieving harmless treatment of solid waste;

[0006] 3. Sustainability: Resource utilization of kiln slag promotes synergy between the metallurgical and building materials industries.

[0007] Traditional zinc slag rotary kilns have the following drawbacks:

[0008] 1. Low zinc recovery rate (75-82%): Zinc vapor undergoes secondary oxidation in the low-temperature zone at the kiln tail to form secondary zinc oxide;

[0009] 2. High energy consumption: The coke powder ratio needs to be 18-22%, and the thermal efficiency is only 35-40%.

[0010] Although existing technologies have solved the problem of material heating, in actual operation, insufficient heating can still lead to poor preheating results. Utility Model Content

[0011] To address the shortcomings mentioned above, this utility model provides a rotary kiln for refining metallic zinc. It is equipped with a ventilation structure with hot air and four heat-conducting structures for heating. Hot air is introduced into the processing chamber from one end, and the temperature inside the chamber is raised by the four heat-conducting structures in the middle of the chamber. Finally, the hot air is discharged through the exhaust structure at the other end of the chamber, thus ensuring the preheating effect on the materials inside the processing chamber.

[0012] To address the aforementioned problems, this utility model provides a rotary kiln for refining metallic zinc, comprising a kiln body and a processing chamber. One end of the processing chamber is connected to the interior of the kiln body via a conveying pipeline. The processing chamber contains a rotating shaft, a rotating plate, and a placement plate. A driving structure is provided on the processing chamber, and the output end of the driving structure is sequentially connected to the rotating plate and the placement plate via the rotating shaft. The kiln also includes a preheating structure, comprising a heat-conducting structure and a heating structure. The heating structure includes an air inlet structure and an air outlet structure. The air inlet structure is located at the right end of the processing chamber and includes an air inlet box, an air inlet fan, and a heating box. The air inlet end of the air inlet fan is connected to the air inlet box, and the air outlet end of the air inlet fan is connected to the interior of the processing chamber via the heating box. The heat-conducting structure includes a first heat-conducting structure, a second heat-conducting structure, a third heat-conducting structure, and a fourth heat-conducting structure. The first and third heat-conducting structures are located on the left front end of the processing chamber, and the second and fourth heat-conducting structures are located on the right front end of the processing chamber.

[0013] Preferably, the air inlet box includes a first air inlet box and a second air inlet box. The first air inlet box is located on the upper right side of the processing box and the second air inlet box is located on the lower right side of the processing box. The air inlet end of the air inlet fan is connected to the bottom end of the first air inlet box through the first air inlet filter box, and the air outlet end of the air inlet fan is connected to the top end of the second air inlet box through the second air inlet filter box.

[0014] Preferably, the right end of the heating box is connected to the air inlet of the air inlet fan, and the left end of the heating box is connected to the interior of the processing box through the air outlet. The heating box is equipped with heating wires.

[0015] Preferably, the air outlet structure includes an air outlet box, which includes a first air outlet box, a second air outlet box, and a third air outlet box. The right end of the first air outlet box is connected to the upper left side of the processing box, the right end of the second air outlet box is connected to the middle left side of the processing box, and the right end of the third air outlet box is connected to the lower left side of the processing box.

[0016] Preferably, the first heat-conducting structure includes a first mounting frame, a first heating box, a first heat-conducting plate, and a first electric heating tube heater. The front end of the processing box is provided with the first mounting frame, the first heating box is provided on the first mounting frame, the first electric heating tube heater is provided inside the first heating box, and the first electric heating tube heater is connected to the processing box through the first heat-conducting plate.

[0017] Preferably, the second heat-conducting structure includes a second mounting bracket, a second heating box, a second heat-conducting plate, and a second electric heating tube heater. The front end of the processing box is provided with a second mounting bracket, the second heating box is provided on the second mounting bracket, the second electric heating tube heater is provided inside the second heating box, and the second electric heating tube heater is connected to the processing box through the second heat-conducting plate.

[0018] Preferably, the third heat-conducting structure includes a third mounting bracket, a third heating box, a third heat-conducting plate, and a third electric heating tube heater. The front end of the processing box is provided with a third mounting bracket, the third heating box is provided on the third mounting bracket, the third electric heating tube heater is provided inside the third heating box, and the third electric heating tube heater is connected to the processing box through the third heat-conducting plate.

[0019] Preferably, the fourth heat-conducting structure includes a fourth mounting bracket, a fourth heating box, a fourth heat-conducting plate, and a fourth electric heating tube heater. The front end of the processing box is provided with a fourth mounting bracket, the fourth heating box is provided on the fourth mounting bracket, the fourth electric heating tube heater is provided inside the fourth heating box, and the fourth electric heating tube heater is connected to the processing box through the fourth heat-conducting plate.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. This utility model is equipped with a ventilation structure with hot air and four heat conduction structures with heating effect. Hot air is introduced into the processing box at one end, and the temperature inside the processing box is raised in conjunction with the four heat conduction structures in the middle of the processing box. Finally, the hot air is discharged through the air outlet structure at the other end of the processing box, thereby ensuring the preheating effect of the material inside the processing box.

[0022] 2. This utility model is equipped with an exhaust structure. When the ventilation structure is not activated, the heat conduction structure heats the inside of the processing box, and the resulting hot airflow can be discharged under the action of the exhaust box, thereby ensuring the effect of daily routine use. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of an embodiment of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and examples, but the examples given are not intended to limit the present utility model.

[0025] like Figure 1 As shown, an embodiment of this utility model includes a kiln body and a processing box. One end of the processing box is connected to the interior of the kiln body through a conveying pipeline. The processing box is equipped with a rotating shaft, a rotating plate, and a placement plate. A driving structure is provided on the processing box, and the output end of the driving structure is connected to the rotating plate and the placement plate in sequence through the rotating shaft.

[0026] In this embodiment, a preheating structure is provided on the processing box. The preheating structure includes a heat-conducting structure and a heating structure. The heat-conducting structure is located at the front end of the processing box, and the heating structure is located at the side end of the processing box.

[0027] In this embodiment, the heating structure includes an air inlet structure, which is located at the right end of the processing box and includes an air inlet box, an air inlet fan, and a heating box. The air inlet end of the air inlet fan is connected to the air inlet box. The air inlet box includes a first air inlet box and a second air inlet box. The first air inlet box is located on the upper right side of the processing box, and the second air inlet box is located on the lower right side of the processing box. The air inlet end of the air inlet fan is connected to the bottom end of the first air inlet box through the first air inlet filter box. The air outlet end of the air inlet fan is connected to the top end of the second air inlet box through the second air inlet filter box. The air outlet end of the air inlet fan is connected to the interior of the processing box through the heating box. The right end of the heating box is connected to the air inlet end of the air inlet fan, and the left end of the heating box is connected to the interior of the processing box through the air outlet end. An electric heating wire is installed inside the heating box.

[0028] In this embodiment, both the first air intake filter box and the second air intake filter box use existing conventional filter boxes with removable filters.

[0029] In this embodiment, the heating structure includes an air outlet structure, which includes an air outlet box. The air outlet box includes a first air outlet box, a second air outlet box, and a third air outlet box. The right end of the first air outlet box is connected to the upper left side of the processing box, the right end of the second air outlet box is connected to the middle left side of the processing box, and the right end of the third air outlet box is connected to the lower left side of the processing box.

[0030] In this embodiment, a detachable first air outlet filter is provided at the connection between the right end of the first air outlet box and the left end of the processing box. A first mounting base is provided at the front end of the first air outlet box. A first air outlet hole that can be controlled to open and close is provided on the first mounting base. The first mounting base includes a first upper mounting base and a first lower mounting base. The first air outlet hole includes a first upper air outlet hole and a first lower air outlet hole. The first upper air outlet hole is connected to the upper side of the first air outlet box through the first upper mounting base. The first lower air outlet hole is connected to the lower side of the first air outlet box through the first lower mounting base.

[0031] In this embodiment, a detachable second air outlet filter is provided at the connection between the right end of the second air outlet box and the left end of the processing box. A second mounting base is provided at the front end of the second air outlet box. A second air outlet hole that can be controlled to open and close is provided on the second mounting base. The second mounting base includes a second upper mounting base and a second lower mounting base. The second air outlet hole includes a second upper air outlet hole and a second lower air outlet hole. The second upper air outlet hole is connected to the upper side of the second air outlet box through the second upper mounting base, and the second lower air outlet hole is connected to the lower side of the second air outlet box through the second lower mounting base.

[0032] In this embodiment, a detachable third air outlet filter is provided at the connection between the right end of the third air outlet box and the left end of the processing box. A third mounting base is provided at the front end of the third air outlet box. A third air outlet hole that can be controlled to open and close is provided on the third mounting base. The third mounting base includes a third upper mounting base and a third lower mounting base. The third air outlet hole includes a third upper air outlet hole and a third lower air outlet hole. The third upper air outlet hole is connected to the upper side of the third air outlet box through the third upper mounting base, and the third lower air outlet hole is connected to the lower side of the third air outlet box through the third lower mounting base.

[0033] In this embodiment, the heat-conducting structure includes a first heat-conducting structure, a second heat-conducting structure, a third heat-conducting structure, and a fourth heat-conducting structure. The first heat-conducting structure and the third heat-conducting structure are disposed on the left front end of the processing box, and the second heat-conducting structure and the fourth heat-conducting structure are disposed on the right front end of the processing box.

[0034] In this embodiment, the first heat-conducting structure includes a first mounting frame, a first heating box, a first heat-conducting plate, and a first electric heating tube heater. The front end of the processing box is provided with the first mounting frame, the first heating box is provided on the first mounting frame, the first electric heating tube heater is provided inside the first heating box, and the first electric heating tube heater is connected to the processing box through the first heat-conducting plate.

[0035] In this embodiment, the second heat-conducting structure includes a second mounting bracket, a second heating box, a second heat-conducting plate, and a second electric heating tube heater. The front end of the processing box is provided with a second mounting bracket, the second heating box is provided on the second mounting bracket, the second electric heating tube heater is provided inside the second heating box, and the second electric heating tube heater is connected to the processing box through the second heat-conducting plate.

[0036] In this embodiment, the third heat-conducting structure includes a third mounting bracket, a third heating box, a third heat-conducting plate, and a third electric heating tube heater. The front end of the processing box is provided with a third mounting bracket, the third heating box is provided on the third mounting bracket, the third electric heating tube heater is provided inside the third heating box, and the third electric heating tube heater is connected to the processing box through the third heat-conducting plate.

[0037] In this embodiment, the fourth heat-conducting structure includes a fourth mounting bracket, a fourth heating box, a fourth heat-conducting plate, and a fourth electric heating tube heater. The front end of the processing box is provided with a fourth mounting bracket, the fourth heating box is provided on the fourth mounting bracket, the fourth electric heating tube heater is provided inside the fourth heating box, and the fourth electric heating tube heater is connected to the processing box through the fourth heat-conducting plate.

[0038] In this embodiment, an exhaust structure is provided at the top of the processing box. The exhaust structure includes an exhaust box, a rotating guide structure and an exhaust pipe on the exhaust box. The rotating guide structure includes a rotating motor, a rotating shaft and rotating guide rods. The rotating motor is located at the top of the exhaust box and its output end is connected to the top of the rotating shaft. Several rotating guide rods are provided on the rotating shaft. The bottom of the exhaust box is connected to the interior of the processing box, and an exhaust pipe is provided at the top of the exhaust box. A valve for controlling opening and closing is provided on the exhaust pipe.

[0039] Those skilled in the art can connect all electrical components and their compatible power supplies in this case via wires, and should select appropriate controllers according to actual conditions to meet control requirements. The specific connection and control sequence, and the sequential operation order between each electrical component to complete the electrical connection, are well-known technologies in the field, and will not be described further regarding electrical control.

[0040] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0041] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing the technical solution of this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this patent application.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this patent application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this specification, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this specification according to the specific circumstances.

[0044] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A rotary kiln for refining metallic zinc, comprising a kiln body and a processing chamber, one end of the processing chamber being connected to the interior of the kiln body via a conveying pipeline, and the processing chamber being provided with a rotating shaft, a rotating plate, and a placement plate; a driving structure is provided on the processing chamber, and the output end of the driving structure is sequentially connected to the rotating plate and the placement plate via the rotating shaft, characterized in that, It also includes a preheating structure, which comprises a heat-conducting structure and a heating structure. The heating structure comprises an air inlet structure and an air outlet structure. The air inlet structure is located at the right end of the processing chamber and includes an air inlet box, an air inlet fan, and a heating box. The air inlet end of the air inlet fan is connected to the air inlet box, and the air outlet end of the air inlet fan is connected to the interior of the processing chamber through the heating box. The heat-conducting structure includes a first heat-conducting structure, a second heat-conducting structure, a third heat-conducting structure, and a fourth heat-conducting structure. The first and third heat-conducting structures are located on the left front end of the processing chamber, and the second and fourth heat-conducting structures are located on the right front end of the processing chamber.

2. A rotary kiln for refining metallic zinc as described in claim 1, characterized in that, The air inlet box includes a first air inlet box and a second air inlet box. The first air inlet box is located on the upper right side of the processing box and the second air inlet box is located on the lower right side of the processing box. The air inlet end of the air inlet fan is connected to the bottom end of the first air inlet box through the first air inlet filter box, and the air outlet end of the air inlet fan is connected to the top end of the second air inlet box through the second air inlet filter box.

3. A rotary kiln for refining metallic zinc as described in claim 2, characterized in that, The right end of the heating box is connected to the air inlet of the air inlet fan, and the left end of the heating box is connected to the interior of the processing box through the air outlet. The heating box is equipped with heating wires.

4. A rotary kiln for refining metallic zinc as described in claim 1, characterized in that, The air outlet structure includes an air outlet box, which includes a first air outlet box, a second air outlet box, and a third air outlet box. The right end of the first air outlet box is connected to the upper left side of the processing box, the right end of the second air outlet box is connected to the middle left side of the processing box, and the right end of the third air outlet box is connected to the lower left side of the processing box.

5. A rotary kiln for refining metallic zinc as described in claim 1, characterized in that, The first heat-conducting structure includes a first mounting frame, a first heating box, a first heat-conducting plate, and a first electric heating tube heater. The front end of the processing box is provided with the first mounting frame, the first heating box is provided on the first mounting frame, the first electric heating tube heater is provided inside the first heating box, and the first electric heating tube heater is connected to the processing box through the first heat-conducting plate.

6. A rotary kiln for refining metallic zinc as described in claim 1, characterized in that, The second heat-conducting structure includes a second mounting bracket, a second heating box, a second heat-conducting plate, and a second electric heating tube heater. The front end of the processing box is provided with a second mounting bracket, the second heating box is provided on the second mounting bracket, the second electric heating tube heater is provided inside the second heating box, and the second electric heating tube heater is connected to the processing box through the second heat-conducting plate.

7. A rotary kiln for refining metallic zinc as described in claim 1, characterized in that, The third heat-conducting structure includes a third mounting bracket, a third heating box, a third heat-conducting plate, and a third electric heating tube heater. The front end of the processing box is provided with a third mounting bracket, the third heating box is provided on the third mounting bracket, the third electric heating tube heater is provided inside the third heating box, and the third electric heating tube heater is connected to the processing box through the third heat-conducting plate.

8. A rotary kiln for refining metallic zinc as described in claim 1, characterized in that, The fourth heat-conducting structure includes a fourth mounting bracket, a fourth heating box, a fourth heat-conducting plate, and a fourth electric heating tube heater. The front end of the processing box is provided with a fourth mounting bracket, the fourth heating box is provided on the fourth mounting bracket, the fourth electric heating tube heater is provided inside the fourth heating box, and the fourth electric heating tube heater is connected to the processing box through the fourth heat-conducting plate.

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