CN211120551U

CN211120551U - Drying bin for corundum green balls

Info

Publication number: CN211120551U
Application number: CN201921868060.XU
Authority: CN
Inventors: 陈要生; 马铮; 倪飞江; 赵义
Original assignee: Zhejiang Zili Advanced Materials Co ltd
Current assignee: Zhejiang Zili Advanced Materials Co ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-07-28
Anticipated expiration: 2029-10-31

Abstract

The application discloses a drying bin for corundum green balls, which comprises a vertically arranged bin body, wherein the top of the bin body is provided with a feeding port, the bottom of the bin body is provided with a discharging port, the side wall of the bin body is provided with an air inlet, and a hot air chamber is arranged in the bin body; the side wall of the hot air chamber is provided with air outlet holes, the interior of the hot air chamber is divided into a plurality of distribution cavities along the height direction, a plurality of air inlets are arranged, and each air inlet is communicated to the corresponding distribution cavity through an independently configured air pipe. The utility model provides a drying bin of corundum green ball sets up the segmentation and dries, each section temperature of control that can be accurate for green ball can guarantee the even stoving effect of corundum green ball according to certain intensification control system slow heating up, guarantees that the moisture content of the corundum green ball that the stoving obtained is below 0.5%, and the phenomenon of stoving layering can not appear.

Description

Drying bin for corundum green balls

Technical Field

The application relates to the technical field of plate-shaped corundum preparation and processing, in particular to a drying bin for corundum green balls.

Background

The plate-shaped corundum is prepared by high-purity high-quality industrial alumina raw materials for metallurgy through high-temperature quick firing at 1850-1950 ℃ in a shaft kiln, has the characteristics of excellent thermal shock resistance, extremely high refractoriness, excellent creep resistance, spalling resistance and the like, and is widely applied to refractory products in industries such as steel, ceramics, casting and the like. The production process of the common tabular corundum comprises the steps of raw material grinding → secondary balling → secondary drying → sintering → cooling and crushing and the like. Wherein, after the grinding of the raw materials is finished, water needs to be added for balling, a large amount of tap water is added as a bonding agent in the balling process, and the water needed by balling is about 20-25 percent. Because the moisture is large, the material can not be directly put into a high-temperature shaft kiln for burning, and the material can be put into the kiln only after being pre-dried and the moisture is controlled below 1 percent.

At present, conventional manufacturers adopt a common drying bin to carry out primary drying or secondary drying. One to more layers of hoods or pipe devices are usually arranged in the drying bin. The air intake is provided with 1 ~ 2, and stoving storehouse upper end is provided with the air exit, and the air exit position sets up big draft centrifugal fan, consequently, is negative pressure usually in the stoving storehouse.

During negative pressure drying, two problems are brought easily: (1) external cold air easily enters the drying bin, so that the drying effect is poor; (2) because the air inlet position is less, and inside presents the negative pressure structure, lead to drying the inside corundum ball moisture of different positions in storehouse seriously inhomogeneous, the position that is close to the air inlet, moisture is lower. The corundum ball is far away from the air inlet, because the temperature is low, the drying effect of the corundum ball is poor, the moisture is high, the temperature of the air inlet close to the air inlet is generally not controlled, the corundum ball can bear severe temperature difference, and the corundum ball can be seriously delaminated and shelled.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that prior art exists, the utility model provides a drying chamber of corundum green ball can guarantee the even stoving of corundum green ball, and is below 0.5% at the moisture content of corundum green ball, and the phenomenon of stoving layering can not appear in the corundum green ball.

The application provides a drying bin for corundum green balls, which comprises a vertically arranged bin body, wherein the top of the bin body is provided with a feeding port, the bottom of the bin body is provided with a discharging port, the side wall of the bin body is provided with an air inlet, and a hot air chamber is arranged in the bin body; the side wall of the hot air chamber is provided with air outlet holes, the interior of the hot air chamber is divided into a plurality of distribution cavities along the height direction, a plurality of air inlets are arranged, and each air inlet is communicated to the corresponding distribution cavity through an independently configured air pipe.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, the hot air chamber is a vertically arranged cylindrical structure, the top of the cylindrical structure is a closed structure, the top of the cylindrical structure is located below the feed opening, and each air pipe enters the corresponding distribution cavity through the bottom of the cylindrical structure.

Optionally, the top of the cylindrical structure is provided with a bulk cone.

Optionally, the tubular structure is a cuboid, the exhaust vent is square holes, and the square holes are distributed in an array manner.

Optionally, the storehouse body includes cylinder section and back taper section from top to bottom in proper order, hot-blast room suspension is in the cylinder section, the air intake is seted up the lateral wall of back taper section.

Optionally, the side wall of the cylindrical section is provided with a reflective corrugated plate.

Optionally, the diameter of the cylindrical section is 5000 mm; the diameter of the hot air chamber is 1000 mm. Optionally, the inside of the hot air chamber is sequentially divided into a first distribution cavity, a second distribution cavity and a third distribution cavity from bottom to top, and the distribution cavities are separated by partition plates.

Optionally, the partition plate includes:

the upper partition plate is positioned between the second distribution cavity and the third distribution cavity;

the lower partition plate is positioned between the first distribution cavity and the second distribution cavity;

the tuber pipe includes:

the first air pipe is communicated into the first distribution cavity through the bottom wall of the hot air chamber;

the second air pipe is introduced into the second distribution cavity through the bottom wall of the hot air chamber and the lower partition plate in sequence;

and the third air pipe is communicated into the third distribution cavity through the bottom wall of the hot air chamber, the lower partition plate and the upper partition plate in sequence.

Optionally, the height ratio of the first distribution cavity to the second distribution cavity to the third distribution cavity is 2:2: 1.

The drying bin for the corundum green balls at least has one of the following technical effects: the drying bin for the corundum green balls is provided with sectional drying, so that the temperature of each section can be accurately controlled, the green balls can be slowly heated according to a certain heating control system, and the drying effect of the corundum green balls is ensured; meanwhile, the moisture content of the corundum green ball obtained by drying is ensured to be below 0.5 percent, and the phenomenon of drying and layering can not occur.

Drawings

FIG. 1 is a schematic structural diagram of a drying bin for corundum green balls according to the present application;

fig. 2 is a schematic view showing the structure of a side wall of the hot air chamber of fig. 1.

The reference numerals in the figures are illustrated as follows:

1. a bin body; 11. a feeding port; 12. a feeding port; 2. a hot air chamber; 21. a side wall; 22. an air outlet; 23. a bulk cone; 24. a first distribution chamber; 25. a second distribution chamber; 26. a third distribution cavity; 3. a reflective corrugated plate; 41. an upper partition plate; 42. a lower partition plate; 51. a first air duct; 52. a second air duct; 53. and a third air duct.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

An embodiment of the application provides a stoving storehouse of corundum green ball, as shown in fig. 1, stoving storehouse is including the storehouse body 1 of putting immediately, the top of the storehouse body 1 has dog-house 11, the bottom of the storehouse body 1 has feed opening 12, the lateral wall of the storehouse body 1 has the air intake, the inside of the storehouse body 1 is equipped with hot-blast room 2, the lateral wall 21 distribution of hot-blast room 2 has exhaust vent 22, the inside of hot-blast room 2 separates to a plurality of distribution chambeies along the direction of height, the air intake has a plurality ofly, each air intake communicates to corresponding distribution chamber through the tuber pipe of independent configuration.

In this embodiment, the stoving storehouse is provided with two-layer heat preservation annular storage structure inside and outside, and the skin is the storehouse body 1, and the inlayer is hot-blast room 2, and the space between the storehouse body 1 and the hot-blast room 2 is used for depositing the corundum green ball, can effectively guarantee the heat preservation effect in stoving storehouse.

The side wall of the bin body 1 is provided with an air inlet, and because the position close to the air inlet is heated, the temperature is higher, and the moisture of the corundum green ball is lower; and the position far away from the air inlet has lower temperature and relatively poorer drying effect, thereby causing the phenomenon of uneven drying.

Therefore, the air inlets are arranged in a plurality of numbers, the hot air chamber 2 is divided into a plurality of distribution cavities, each distribution cavity is provided with an independent air pipe, and hot air is respectively led into the corresponding distribution cavity by different air inlets of each air pipe and is used for setting corresponding temperature gradients according to the distance from the air inlets.

The corundum green balls are thrown in from a feeding port 11 at the top of the bin body 1, air outlet holes 22 are distributed on the side wall 21 of the hot air chamber 2, hot air is introduced into corresponding distribution cavities from different air inlets of the bin body 1 through corresponding air pipes and is blown out through the air outlet holes 22 on the side wall 21, the hot air in the distribution cavities with different heights can dry the corundum green balls with different heights, and finally the dried corundum green balls are discharged through a discharging port 12. The hot air introduced from different air inlets is provided with a temperature gradient, and the higher the height of the distribution cavity is, the higher the temperature of the introduced hot air is, so that the corundum green ball can be heated uniformly, and the drying effect is ensured; meanwhile, the heat sources with different temperatures can also avoid the intense heating of the corundum green ball so as to avoid the phenomenon of shelling the ball body.

In another embodiment, the hot air chamber 2 is a vertical cylindrical structure, the top of the cylindrical structure is a closed structure and is located below the feeding port 11, and each air pipe enters the corresponding distribution cavity through the bottom of the cylindrical structure.

Because the space between the hot air chamber 2 and the bin body 1 is used for storing the corundum green balls, and the hot air is mainly blown out from the side wall of the hot air chamber 2, the hot air chamber 2 is arranged into a vertical cylindrical structure, so that the corundum green balls are mainly longitudinally arranged, and the hot air is convenient for drying the corundum green balls.

The hot air chamber 2 is positioned below the feeding port 11, the top of the tubular structure is set to be a closed structure, and corundum green ball materials can be prevented from being thrown into a distribution cavity in the hot air chamber 2.

Each tuber pipe gets into corresponding distribution chamber via tubular structure's bottom, can guarantee that the hot-air's heat flow direction is from lower to upper, and the corundum green ball material is thrown by the dog-house 11 of the storehouse body, and the direction of throwing is from top to bottom, and better stoving effect can be guaranteed to the hot-air adverse current.

In order to effectively throw the materials into the position between the bin body 1 and the hot air chamber 2, in another embodiment, the top of the cylindrical structure is provided with a material scattering cone 23.

If the cylindrical structure has no scattering cone 23 at the top, the charged corundum pellets are likely to be accumulated on the top of the hot air chamber 2. Because the top of hot-blast chamber 2 is enclosed construction, the unable effectual transmission of the interior hot-blast air of hot-blast chamber 2 is for accumulational material, can lead to the stoving of material inhomogeneous, consequently, tubular structure's top has the bulk cone, can be so that putting in smoothly of corundum green ball, guarantees the stoving effect of corundum green ball.

In another embodiment, as shown in fig. 2, the cylindrical structure is a cuboid, and the air outlet 22 is a square hole, and the square holes are distributed in an array.

The air outlet holes 22 are square holes, and the diameter of the corundum raw ball is slightly smaller than the side length of each square hole, so that the corundum raw ball in the bin body 1 can be prevented from leaking, and a certain ventilation effect can be ensured.

For example, the diameter of the corundum green ball is 23-25 mm, square holes 10 × 10mm can be formed, and the distance is 10 mm.

In another embodiment, the bin body 1 comprises a cylindrical section and an inverted cone section from top to bottom in sequence, the hot air chamber 2 is suspended on the cylindrical section, and the air inlet is arranged on the side wall of the inverted cone section.

Establish the upper portion of storehouse body 1 into the cylinder section, establish the back taper section in the lower part, the cylinder section is convenient for putting smoothly of corundum green ball, and the back taper section is convenient for the smooth ejection of compact of the corundum green ball of internal stoving in storehouse. The hot air chamber 2 is suspended at the cylindrical section of the bin body, so that the corundum green ball positioned between the cylindrical section and the hot air chamber is dried more effectively by hot air blown out from the hot air chamber 2. The air inlet is arranged on the side wall of the inverted cone section, so that the space of the bin body 1 can be more effectively utilized, and the corundum green ball materials are dried by utilizing heat source air.

In order to improve the drying effect, in another embodiment, the side wall of the cylindrical section is provided with a reflective corrugated plate 3.

The side wall of the cylindrical section is provided with the reflection corrugated plate 3, so that the bin body 1 has better bearing capacity and deformation resistance on one hand; on the other hand, the reflective corrugated plate 3 can effectively disperse the airflow and improve the drying effect.

In another embodiment, the cylindrical section has a diameter of 5000 mm; the diameter of the hot air chamber 2 is 1000 mm.

The diameter of the cylindrical section refers to the outer diameter of the cylindrical section; the diameter of the hot air chamber 2 means the side length of the hot air chamber 2.

The secondary separation is a first distribution cavity 24, a second distribution cavity 25 and a third distribution cavity 26, and the distribution cavities are separated by partition plates.

The hot air chamber 2 can be divided into a plurality of distribution cavities, and three distribution cavities are suitable, so that the effect of uniform drying can be achieved, and the processing and manufacturing are convenient. The hot air chamber 2 is separated by a partition plate which is of a non-porous structure so as to prevent the hot air in each distribution cavity from mutually convecting.

In another embodiment, the separator comprises:

an upper baffle plate 41 positioned between the second distribution chamber 25 and the third distribution chamber 26;

a lower partition 42 located between the first distribution chamber 24 and the second distribution chamber 25;

the tuber pipe includes:

the first air pipe 51, the first air pipe 51 is led into the first distribution cavity 24 through the bottom wall of the hot air chamber 2;

the second air pipe 52, the second air pipe 52 is sequentially led into the second distribution cavity 25 through the bottom wall of the hot air chamber 2 and the lower partition plate 42;

the third air duct 53, the third air duct 53 passes through the bottom wall of the hot air chamber 2, the lower partition plate 42 and the upper partition plate 41 in sequence and is led into the third distribution cavity 26.

The three sub-cavities respectively correspond to three air pipes with different air flow temperatures, each air pipe is introduced from the side wall of the inverted cone section and is introduced into the corresponding distribution cavity through the bottom wall of the corresponding hot air chamber 2, the lower partition plate 42 and the upper partition plate 41, and the arrangement mode can fully utilize the space in the drying working area and improve the drying effect of the corundum green ball. The heat temperatures of the first distribution cavity 24, the second distribution cavity 25 and the third distribution cavity 26 are respectively set by setting temperature control valves and temperature sensors at the air inlet pipelines of the first air duct 51, the second air duct 52 and the third air duct 53, and setting corresponding temperature gradients to ensure that the inlet air temperatures are within a specified range. Because the farther the air inlet is, the lower the temperature of the hot air in the air pipe is, the farther the distribution cavity is from the air inlet, the higher the air inlet temperature of the air pipe is. For example, the temperature of the inlet air of the first distribution cavity 24 is controlled to be 150-200 ℃, the temperature of the inlet air of the second distribution cavity 25 is controlled to be 200-300 ℃, the temperature of the inlet air of the third distribution cavity 26 is controlled to be 300-350 ℃, and the temperature gradient required by drying is ensured. The three distribution cavities are in positive pressure, the pressure is kept at 5-6 kPa, and enough heat is guaranteed to enter the corundum green ball.

In order to save energy, hot air sources of the second distribution cavity 25 and the third distribution cavity 26 are respectively obtained from waste heat of different areas of the kiln, and a burner is independently arranged on the hot air source of the first distribution cavity 24 to provide a heat source, so that the stability of the temperature of hot air is ensured. The corundum green pellets enter the bin body 1 from a feeding port 11 at the top of the bin body 1, and on one hand, hot air blown in from the bottom of the hot air chamber 2 by using the waste heat of the kiln is used for drying, and on the other hand, hot air heated by a burner is used for drying.

In another embodiment, the height ratio of the first distribution chamber 24, the second distribution chamber 25 and the third distribution chamber 26 is 2:2: 1.

Since the first distribution chamber 24 and the second distribution chamber 25 are closer to the heat source, the first distribution chamber 24 and the second distribution chamber have a higher height than the third distribution chamber 26, which is farther away, in order to make the best use of the heat source. For example, a height of the first distribution chamber 24 of 4m, a height of the second distribution chamber 25 of 4m and a height of the third distribution chamber 26 of 2m may be provided.

The corundum green ball is thrown in from a feeding port 11 at the top of the bin body 1, hot air is introduced into corresponding distribution cavities from different air inlets of the bin body 1 through corresponding air pipes, and is blown out through air outlet holes 22 of the corresponding distribution cavities to dry the corundum green ball, the dried corundum green ball is discharged through a discharging port 12, a vibrating screen is arranged at the lower part of the discharging port 12, and crushed materials of the dried corundum green ball are fully screened to prevent the crushed materials from entering the kiln.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims

1. The drying bin for the corundum green balls comprises a vertically arranged bin body, wherein the top of the bin body is provided with a feeding port, the bottom of the bin body is provided with a discharging port, and the side wall of the bin body is provided with an air inlet; the side wall of the hot air chamber is provided with air outlet holes, the interior of the hot air chamber is divided into a plurality of distribution cavities along the height direction, a plurality of air inlets are arranged, and each air inlet is communicated to the corresponding distribution cavity through an independently configured air pipe.

2. The corundum green pellet drying bin as claimed in claim 1, wherein the hot air chamber is a vertically arranged cylindrical structure, the top of the cylindrical structure is a closed structure and is located below the feeding port, and each air pipe enters the corresponding distribution cavity through the bottom of the cylindrical structure.

3. The corundum green ball drying bin according to claim 2, wherein the top of the cylindrical structure is provided with a bulk cone.

4. The drying bin for the corundum green balls as claimed in claim 3, wherein the cylindrical structure is a cuboid, the air outlet holes are square holes, and the square holes are distributed in an array.

5. The corundum green ball drying bin according to claim 1, wherein the bin body sequentially comprises a cylindrical section and an inverted cone section from top to bottom, the hot air chamber is suspended on the cylindrical section, and the air inlet is formed in the side wall of the inverted cone section.

6. The corundum green ball drying bin according to claim 5, wherein the side wall of the cylindrical section is provided with a reflective corrugated plate.

7. The drying bin for the corundum green balls according to claim 6, characterized in that the diameter of the cylindrical section is 5000 mm; the diameter of the hot air chamber is 1000 mm.

8. The corundum green ball drying bin according to claim 1, wherein the interior of the hot air chamber is sequentially divided into a first distribution cavity, a second distribution cavity and a third distribution cavity from bottom to top, and the distribution cavities are separated by a partition plate.

9. The corundum green pellet drying bin of claim 8, wherein the partition plate comprises:

the tuber pipe includes:

10. The corundum green ball drying bin according to claim 8, wherein the height ratio of the first distribution cavity to the second distribution cavity to the third distribution cavity is 2:2: 1.