CN217358005U - Rotary kiln for manganese dioxide reduction - Google Patents

Abstract

The utility model discloses a rotary kiln for manganese dioxide reduction, which comprises a kiln head, a kiln body, a kiln tail, a casting material stop ring, a casting fire-resistant layer, a stir-frying lifting blade and a blanking dust collecting device which are connected; the reduction section of the kiln body is provided with a reduction lifting plate, the feeding end of the kiln tail is also provided with a plurality of rings of material pushing guide plates, the pouring material blocking ring in the kiln head is provided with an unloading pouring ring, and the unloading pouring ring is uniformly provided with a plurality of uniform blanking ports along the circumferential direction. The rotary kiln is provided with a plurality of rings of pushing guide plates at the feeding end part of the kiln tail, so that materials can smoothly enter the kiln, and the materials are effectively prevented from being blocked at the feeding end or emerging from the kiln tail sealing cover; a reduction material raising plate is also arranged to increase the amount of the materials raised by the turning over of the reduction section and ensure that the materials in the reduction section can be subjected to full reduction reaction; in addition, set up the unloading pouring ring that has evenly seted up even feed opening along the hoop direction in the kiln head, realized even unloading, avoided the cooling device undulant, guaranteed the cooling device steady operation.

Description

Rotary kiln for manganese dioxide reduction

Technical Field

The utility model relates to a rotary kiln, in particular to a rotary kiln for manganese dioxide reduction.

Background

In the field of manganese metallurgy, MnO in manganese ore is required for preparing electrolytic manganese ₂ Reduction by roasting to MnO containing MnO ₂ The manganese ore sand and the anthracite powder are mixed according to the ratio of 7.5:1, and then enter a drying section (250-350 ℃) and a preheating section (650-700 ℃) of a reduction rotary kiln, and finally enter a reduction section (750-800 ℃) to carry out reduction reaction.

At present, the rotary kiln that manganese dioxide reduction used, the structure is shown in fig. 5, including the rotary kiln body, turn right from a left side and be kiln head, the kiln body, kiln tail in proper order, be equipped with in the kiln head and be equipped with the pouring and keep off the material circle along its hoop direction, the kiln body is equipped with the pouring flame retardant coating along its hoop direction, and is equipped with a plurality of circles of lifting devices in the kiln body, and every circle of lifting device all includes the square striker plate of a plurality of welding on the internal wall of kiln, the tip and the unloading dust arrester installation of kiln tail are connected. The rotary kiln with the structure has the following defects: firstly, a kiln body is sequentially divided into a reduction section, a preheating section and a drying section from right to left, the reduction section needs materials to be in full contact reaction, and the existing baffle plates which are arranged into square structures are arranged in the reduction section, the preheating section and the drying section, so that the violent turnover of the materials in the reduction section cannot be realized, and the reduction reaction of the materials is influenced; secondly, the feeding end part of the kiln tail is not provided with a related material pushing guide device, so that materials are easy to extrude out of a feeding side pile and are difficult to enter the kiln, and even the materials are blown out of a sealing cover; in addition, when the material outflow is uneven in unit time, the kiln head is not provided with the feed opening uniformly on the casting stop ring, so that the material buffering cannot be carried out, the material amount of the cooling equipment for receiving the kiln head material in unit time is different, the fluctuation of the cooling equipment is caused, and the influence and even the damage to the cooling equipment are avoided.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a rotary kiln for manganese dioxide reduction, which is provided with a plurality of rings of material pushing guide plates at the feeding end part of the kiln tail, so that materials can smoothly enter the kiln, and the materials are effectively prevented from being blocked at the feeding end or from emerging from a kiln tail sealing cover; the reduction section of the kiln body is provided with a reduction lifting plate, the structure that the conventional kiln body is internally provided with a stir-frying lifting plate is changed, the amount of the materials stirred and lifted by the reduction section is increased, and the materials in the reduction section can be ensured to be subjected to full reduction reaction; in addition, set up the unloading pouring circle that evenly offers even feed opening along the hoop direction in the kiln head, realized in the unit interval, when the material ejection of compact was inhomogeneous after the reduction, accessible unloading pouring circle temporarily cushions, from even feed opening equivalent unloading again, avoids cooling device fluctuation, guarantees cooling device steady operation.

In order to achieve the purpose, the utility model discloses the technical scheme who takes:

the rotary kiln for manganese dioxide reduction is the same as the existing structure: the rotary kiln comprises a rotary kiln body, wherein the rotary kiln body sequentially comprises a kiln head, a kiln body and a kiln tail from left to right, a pouring stop ring is arranged in the kiln head along the circumferential direction of the kiln head, a pouring refractory layer is arranged in the kiln body along the circumferential direction of the kiln body, a plurality of material lifting devices are arranged in the kiln body, each material lifting device comprises a plurality of stir-frying material lifting plates welded on the inner wall of the kiln body in a square shape, and the end part of the kiln tail is connected with a blanking dust collecting device; the difference is that: the reduction section of the kiln body is equipped with a plurality of rings of reduction material raising pieces along its hoop direction, and every ring of reduction material raising piece all includes a plurality of pieces reduction lifting blade, reduction lifting blade includes the vertical support lifting blade of locating on the kiln body inner wall, support lifting blade upper end and have the enhancement lifting blade of slope on locating it, the feed end of kiln tail is equipped with a plurality of rings and is used for pushing away the deflector that pushes away in the kiln with the material, it sets up along the even slope of the annular direction of kiln tail to push away the deflector, be equipped with the unloading pouring circle that is used for the buffering material on the pouring dam circle in the kiln head, the even feed opening of a plurality of has evenly been seted up along the hoop direction to unloading pouring circle.

As an optimal technical scheme, in order to ensure that materials to be reduced smoothly enter the kiln tail along with the material pushing guide plate and further avoid the materials from being blocked at the feeding end of the kiln tail or from overflowing out of the sealing cover, the utilization rate of the materials is improved, and the material pushing guide plate is inclined by 40 degrees relative to the horizontal plane and is arranged on the inner wall of the kiln tail.

As a preferred technical scheme, in order to lift the materials in the reduction section in the kiln body as much as possible by stirring, further ensure that the materials can fully carry out reduction reaction and improve the reduction rate of the materials, the reinforcing lifting blades are arranged by inclining 150 degrees relative to the supporting lifting blades.

Compared with the prior art, the utility model discloses the beneficial effect who has:

1. the rotary kiln is provided with a plurality of rings of pushing guide plates at the feeding end part of the kiln tail, so that materials can smoothly enter the kiln, and the materials are effectively prevented from being blocked at the feeding end or emerging from the kiln tail sealing cover; the reduction section of the kiln body is provided with the reduction lifting plate, the structure that the conventional kiln body is internally provided with the stir-frying lifting plate is changed, the material turning and lifting amount of the reduction section is increased, and the reduction section can be ensured to carry out full reduction reaction; in addition, set up the unloading pouring circle that has evenly seted up even feed opening along the hoop direction in the kiln head, realized in unit time, when the material ejection of compact is inhomogeneous after the reduction, accessible unloading pouring circle temporarily cushions, and from even feed opening equivalent unloading again, it is undulant to avoid cooling equipment, guarantees cooling equipment steady operation.

2. The angle of the material pushing guide plate is set scientifically and reasonably, the condition that materials needing to be reduced smoothly enter the kiln tail is verified, the materials are further prevented from being blocked at the feeding end of the kiln tail or from overflowing out of the sealing cover, and the utilization rate of the materials is improved.

3. The angle arrangement of the reinforcing lifting plate relative to the supporting lifting plate is scientific and reasonable, so that the materials in the reduction section in the kiln body are lifted as much as possible by stirring, the reduction reaction of the materials can be fully carried out, and the reduction rate of the materials is improved.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic sectional structure diagram of a reduction section of a kiln body;

FIG. 3 is a schematic sectional structure diagram of a preheating section and a drying section of the kiln body;

FIG. 4 is a schematic view of the construction of the kiln head;

FIG. 5 is a schematic structural view of a conventional manganese dioxide reduction rotary kiln;

reference numerals: 1. the device comprises a kiln head, 1-1 pouring stop ring, 1-2 blanking pouring rings, 1-3 uniform blanking ports, 1-4 reducing gas inlets, 2 kiln bodies, 2-1 pouring fire-resistant layers, 2-2 stir-frying lifting blades, 2-3 reducing lifting blades, 2-3 supporting lifting blades, 2-3-2 reinforcing lifting blades, 3 kiln tails, 3-1 pushing guide plates, 4 blanking dust collecting devices.

Detailed Description

As shown in fig. 1, a rotary kiln for manganese dioxide reduction according to an embodiment of the present invention is the same as the conventional rotary kiln in structure: the rotary kiln comprises a rotary kiln body, wherein the rotary kiln body comprises a kiln head 1, a kiln body 2 and a kiln tail 3 from left to right in sequence, a pouring stop ring 1-1 is arranged in the kiln head 1 along the circumferential direction, a pouring refractory layer 2-1 is arranged in the kiln body 2 along the circumferential direction, a plurality of material raising devices are arranged in the kiln body 2, each material raising device comprises a plurality of stir-frying material raising plates 2-2 welded on the inner wall of the kiln body 2 in a square shape, as shown in figure 3, and the end part of the kiln tail 3 is connected with a blanking dust collecting device 4; the difference is that: the reduction section of the kiln body 2 is provided with a plurality of rings of reduction material raising pieces along the circumferential direction, each ring of reduction material raising pieces comprises a plurality of reduction material raising plates 2-3, in order to ensure that the materials in the reduction section can be fully raised and fully subjected to reduction reaction, each ring of reduction material raising pieces comprises 20 reduction material raising plates 2-3 with the interval of 500mm, each reduction material raising plate 2-3 comprises a support material raising plate 2-3-1 vertically arranged on the inner wall of the kiln body 2, the upper end of each support material raising plate 2-3-1 is provided with a reinforced material raising plate 2-3-2 obliquely arranged thereon, as shown in figure 2, the reinforced material raising plates are additionally arranged, the quantity of the raised materials is increased, the materials in the reduction section can be fully raised and are beneficial to the full reduction reaction of the materials, the feeding end of the kiln tail 3 is provided with a plurality of rings of material pushing guide plates 3-1 for pushing the materials in the kiln, the material pushing guide plates 2-4 are uniformly and obliquely arranged along the annular direction of the kiln tail 3, on the premise of ensuring that all materials can be smoothly pushed into the kiln, the feeding end of the kiln tail 3 is provided with 2 rings of material pushing guide plates 3-1, the casting material blocking ring 1-1 in the kiln head 1 is provided with a blanking casting ring 1-2 which can buffer the materials, the blanking casting ring 1-2 is uniformly provided with a plurality of uniform blanking ports 1-3 along the annular direction, on the premise of ensuring that the materials can uniformly fall from the kiln head 1, the blanking casting ring 1-2 is uniformly provided with 6 uniform blanking ports 1-3, the size of each uniform blanking port 1-3 is 100 x 400mm, the kiln head 1 is also provided with a reducing gas inlet 1-4 positioned in the blanking casting ring, as shown in figure 4, in order to prevent the escape of the reducing gas, the diameter of the reducing gas inlet 1 to 4 is set as small as possible.

The material pushing guide plate 3-1 is inclined by 40 degrees relative to the horizontal plane and is arranged on the inner wall of the kiln tail 3, so that the material to be reduced can smoothly enter the kiln tail 3 along with the material pushing guide plate 3-1, the material is further prevented from being blocked at the feeding end of the kiln tail 3 or from emerging from the sealing cover, and the utilization rate of the material is improved.

The reinforced lifting plate 2-3-2 is inclined by 150 degrees relative to the supporting lifting plate 2-3-1, so that the inclination angle between the reinforced lifting plate 2-3-2 and the supporting lifting plate 2-3-1 is 150 degrees, the quantity of lifted materials is effectively increased, the materials in the reduction section in the kiln body 2 are lifted by stirring as much as possible, the materials can be further ensured to be fully subjected to reduction reaction, and the reduction rate of the materials is improved.

The utility model discloses during the use: starting the rotary kiln, reducing gas enters the kiln body 2 from the kiln head 1 through a reducing gas inlet 1-4, a material line passes through a discharging dust collecting device 4, passes through a material pushing guide plate 2-4, and enters the kiln body 2 from a kiln tail 3, the material is lifted up through a stir-frying material lifting plate 2-2 in a preheating section and a drying section to realize the heating and drying of the material, after entering a reduction section, the material is lifted up under the action of the reduction material lifting plate 2-3, on one hand, the full contact reaction between the materials is increased, on the other hand, the reducing gas and the material are fully subjected to the contact reaction to fully reduce the material, when the material amount entering the kiln head 1 in unit time is not uniform, firstly, the discharging casting ring 1-2 is buffered, the discharging casting ring 1-2 rotates along with the kiln head 1, then the material is discharged from a uniform discharging port 1-3, so that the material amount discharged each time is uniform, effectively avoid cooling device undulant, ensure cooling device normal operating.

Of course, the above detailed description is only made for the preferred embodiments of the present invention with reference to the accompanying drawings, and not to limit the scope of the present invention, and all equivalent changes made according to the principles, structures and structures of the present invention should be covered by the protection scope of the present invention.

Claims (3)

1. The rotary kiln for manganese dioxide reduction comprises a rotary kiln body, wherein the rotary kiln body sequentially comprises a kiln head (1), a kiln body (2) and a kiln tail (3) from left to right, a pouring material blocking ring (1-1) is arranged in the kiln head (1) along the circumferential direction of the kiln head, a pouring refractory layer (2-1) is arranged in the kiln body (2) along the circumferential direction of the kiln body, a plurality of material lifting devices are arranged in the kiln body (2), each material lifting device comprises a plurality of stir-frying material lifting plates (2-2) welded on the inner wall of the kiln body (2) in a square shape, and the end part of the kiln tail (3) is connected with a blanking dust collecting device (4); the method is characterized in that: the reduction section of the kiln body (2) is provided with a plurality of rings of reduction material raising parts along the circumferential direction, each ring of reduction material raising parts comprises a plurality of reduction material raising plates (2-3), each reduction material raising plate (2-3) comprises a supporting material raising plate (2-3-1) vertically arranged on the inner wall of the kiln body (2), the upper end of the supporting material raising plate (2-3-1) is provided with a reinforcing material raising plate (2-3-2) obliquely arranged on the supporting material raising plate, the feeding end of the kiln tail (3) is provided with a plurality of rings of material pushing guide plates (3-1) used for pushing materials into the kiln, the material pushing guide plates (3-1) are uniformly obliquely arranged along the annular direction of the kiln tail (3), and the casting material stop rings (1-1) in the kiln head (1) are provided with blanking casting rings (1-2) used for buffering materials, the blanking pouring ring (1-2) is uniformly provided with a plurality of uniform blanking ports (1-3) along the circumferential direction.

2. The rotary kiln for manganese dioxide reduction according to claim 1, wherein: the material pushing guide plate (3-1) is inclined by 40 degrees relative to the horizontal plane and is arranged on the inner wall of the kiln tail (3).

3. The rotary kiln for manganese dioxide reduction according to claim 1 or 2, characterized in that: the reinforcing lifting blades (2-3-2) are inclined by 150 degrees relative to the supporting lifting blades (2-3-1).

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