CN211503657U - Rotary kiln without refractory material lining - Google Patents
Rotary kiln without refractory material lining Download PDFInfo
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- CN211503657U CN211503657U CN202020171331.2U CN202020171331U CN211503657U CN 211503657 U CN211503657 U CN 211503657U CN 202020171331 U CN202020171331 U CN 202020171331U CN 211503657 U CN211503657 U CN 211503657U
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Abstract
The utility model belongs to the metallurgical equipment field especially relates to a rotary kiln of no refractory material furnace wall. The utility model provides a flight and lifting blade carry out welded connection, have increased the whole intensity of rotary kiln outside, also improve the flexibility of material operation. The rotary kiln lining of the utility model is made of no refractory material, the maximum service temperature is 1100 ℃, and when the service temperature is below 900 ℃, the heat-insulating layer can be made of common aluminum silicate cotton; when the use temperature is 900-1100 ℃, the heat preservation layer adopts alumina cotton containing zirconium for heat preservation, and the thickness of the heat preservation layer is 50-200 mm; the load of the rotary kiln is greatly reduced, the weight of the rotary kiln is only about 1/3 of the same internal combustion rotary kiln, the rotary kiln is light and flexible to operate, the foundation is simple when the rotary kiln is installed at a high position, and the investment cost of civil engineering and devices is greatly reduced.
Description
Technical Field
The utility model belongs to the metallurgical equipment field especially relates to a rotary kiln of no refractory material furnace wall.
Background
The rotary kiln is divided into an internal combustion type rotary kiln and an external heating type rotary kiln.
Wherein, the internal combustion rotary kiln is provided with a refractory material furnace lining with the thickness of 200-; although the load of the external heating rotary kiln is small, the structure is complex, and the manufacturing cost of the large external heating rotary kiln is high.
Some rotary kiln furnaces are required to be very high when in use, the height from the ground is generally 10-30m or even higher, an internal combustion rotary kiln is adopted, the foundation of the rotary kiln furnace is required to be of a concrete structure, and the investment is very large; the external heating rotary kiln is adopted, and the comprehensive investment is also large due to the complex structure.
Based on the above situation, the present invention provides a rotary kiln without a lining made of refractory material.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the not enough of above-mentioned prior art existence, provide a rotary kiln of no refractory material furnace wall.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a rotary kiln without a refractory material furnace lining is characterized by comprising a rotary kiln cylinder, a charging hopper and a driving device; the driving device comprises a kiln tail driving device and a kiln head driving device;
the front end of the rotary kiln cylinder is connected with the charging hopper; a kiln tail cover is arranged at the front end of the rotary kiln cylinder body, and a tail gas outlet is formed in the kiln tail cover;
a heat-insulating layer and a heat-insulating shell are arranged outside the rotary kiln cylinder body;
a kiln tail supporting ring is arranged outside the front section of the rotary kiln cylinder, a kiln head supporting ring is arranged outside the rear section of the rotary kiln cylinder, and the kiln tail driving device drives the rotary kiln cylinder to rotate through the kiln tail supporting ring and the kiln head driving device together through the kiln head supporting ring;
a plurality of shifting forks are arranged on the inner surface of the heat-insulating shell at the kiln tail supporting ring and the kiln head supporting ring, a plurality of steel plates are arranged on the outer surface of the rotary kiln cylinder, and the free ends of the steel plates are inserted into the shifting forks;
the rotary kiln barrel is internally provided with spiral sheets, and a material raising plate is arranged between the spiral sheets;
a kiln head cover is arranged at the rear end of the rotary kiln cylinder body, and a kiln head discharge hole is formed in the kiln head cover; and a spray gun is arranged at the tail end of the kiln head cover and is introduced into the rotary kiln cylinder.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the kiln tail driving device comprises a kiln tail motor, a kiln tail riding wheel and a kiln tail retaining wheel; the output end of the kiln tail motor is provided with a kiln tail supporting wheel, the outer side of the kiln tail supporting wheel is provided with a kiln tail retaining wheel, and the kiln tail supporting wheel, the kiln tail supporting ring and the kiln tail retaining wheel are matched to rotate.
Further, the kiln head driving device comprises a kiln head motor, a kiln head supporting wheel and a kiln head retaining wheel; the output end of the kiln head motor is provided with a kiln head supporting wheel, the outer side of the kiln head supporting wheel is provided with a kiln head retaining wheel, and the kiln head supporting wheel, the kiln head supporting ring and the kiln head retaining wheel are matched to rotate.
The beneficial effect of adopting above-mentioned further scheme is, can effectively solve radial expansion and the vertical expansion problem when the rotary kiln barrel high temperature operation.
Further, GN-302A high-temperature reflective heat-insulating nano composite ceramic paint is sprayed on the surface of the inner layer or the surface of the outer layer of the rotary kiln cylinder.
Further, the GN-302A high temperature reflective insulating nanocomposite ceramic coating was purchased from Canon New materials technology, Inc., Guangzhou.
The further scheme has the beneficial effects that the used nano composite ceramic coating is a single-component alcohol system inorganic nano composite ceramic coating, so that the construction is convenient, the coating is saved, and the coating is environment-friendly and nontoxic; the heat insulation performance of the coating is stable and good, the heat conductivity is about 0.03W/M.K, and good reflection heat insulation of a thin coating (less than 0.1 mm) can be realized; the reflectivity of the coating to heat radiation is more than 85 percent, so that the heat utilization rate can be effectively improved; the coating has good adhesion, high temperature and cold impact resistance, good thermal shock resistance, heat insulation and corrosion prevention, and certain strength; the coating has good electrical insulation performance and can resist damp, heat, acid and alkali corrosion; if the nano coating is compounded with aerogel with corresponding specification, the heat insulation performance can be further enhanced; if the nano coating is used with a matched high-temperature sealing nano composite ceramic reinforcing agent, the performance is more stable.
Further, the rotary kiln cylinder, the spiral plate and the material raising plate are made of 304, 316L, 31S or 314 heat-resistant stainless steel materials.
Further, the rotating speed of the rotary kiln cylinder is 0.3-10 r/min.
Further, the rotary kiln cylinder is horizontally installed or is installed by inclining upwards by 30 degrees or inclining downwards by 30 degrees.
The rotary kiln has the advantages that the rotary kiln can be used as a common rotary kiln for roasting or reducing materials, and can also be used as a long-distance or short-distance heat preservation or heating conveying roller.
The utility model has the advantages that:
1. the utility model provides a flight and lifting blade carry out welded connection, have increased the whole intensity of rotary kiln outside, also improve the flexibility of material operation.
2. The rotary kiln lining of the utility model is made of no refractory material, the maximum service temperature is 1100 ℃, and when the service temperature is below 900 ℃, the heat-insulating layer can be made of common aluminum silicate cotton; when the use temperature is 900-1100 ℃, the heat preservation layer adopts alumina cotton containing zirconium for heat preservation, and the thickness of the heat preservation layer is 50-200 mm; the load of the rotary kiln is greatly reduced, the weight of the rotary kiln is only about 1/3 of the same internal combustion rotary kiln, the rotary kiln is light and flexible to operate, the foundation is simple when the rotary kiln is installed at a high position, and the investment cost of civil engineering and devices is greatly reduced.
Drawings
Fig. 1 is a schematic longitudinal sectional view of the present invention;
FIG. 2 is a schematic sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic sectional view taken along line B-B of FIG. 1;
FIG. 4 is an enlarged view of the point M in FIG. 2;
in the figure, 1, a rotary kiln cylinder body; 2. a hopper; 3. a kiln tail cover; 4. a tail gas outlet; 5. a heat-insulating layer; 6. a heat-insulating shell; 7. a kiln tail support ring; 8. a kiln head supporting ring; 9. a shifting fork; 10. a steel plate; 11. a spiral sheet; 12. a material raising plate; 13. a kiln head cover; 14. a kiln head discharge hole; 15. a spray gun; 16. a kiln tail motor; 17. a kiln tail riding wheel; 18. a kiln tail catch wheel; 19. a kiln head motor; 20. a kiln head riding wheel; 21. the kiln head keeps off the wheel.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
A rotary kiln without a refractory material furnace lining is characterized by comprising a rotary kiln cylinder body 1, a charging hopper 2 and a driving device; the driving device comprises a kiln tail driving device and a kiln head driving device;
the front end of the rotary kiln cylinder is connected with the charging hopper; the front end of the rotary kiln barrel is provided with a kiln tail cover 3, and a tail gas outlet 4 is arranged on the kiln tail cover;
a heat-insulating layer 5 and a heat-insulating shell 6 are arranged outside the rotary kiln cylinder body;
a kiln tail supporting ring 7 is arranged outside the front section of the rotary kiln cylinder, a kiln head supporting ring 8 is arranged outside the rear section of the rotary kiln cylinder, and the kiln tail driving device drives the rotary kiln cylinder to rotate through the kiln tail supporting ring and the kiln head driving device together through the kiln head supporting ring;
at the kiln tail supporting ring and the kiln head supporting ring, a plurality of shifting forks 9 are arranged on the inner surface of the heat-insulating shell, a plurality of steel plates 10 are arranged on the outer surface of the rotary kiln cylinder body, and the free ends of the steel plates are inserted into the shifting forks;
the rotary kiln barrel is internally provided with spiral sheets 11, and a material raising plate 12 is arranged between the spiral sheets;
a kiln head cover 13 is arranged at the rear end of the rotary kiln cylinder, and a kiln head discharge hole 14 is formed in the kiln head cover; and a spray gun 15 is arranged at the tail end of the kiln head cover and is introduced into the rotary kiln cylinder.
The kiln tail driving device comprises a kiln tail motor 16, a kiln tail riding wheel 17 and a kiln tail blocking wheel 18; the output end of the kiln tail motor is provided with a kiln tail supporting wheel, the outer side of the kiln tail supporting wheel is provided with a kiln tail retaining wheel, and the kiln tail supporting wheel, the kiln tail supporting ring and the kiln tail retaining wheel are matched for rotation; the kiln head driving device comprises a kiln head motor 19, a kiln head supporting wheel 20 and a kiln head retaining wheel 21; the output end of the kiln head motor is provided with a kiln head supporting wheel, the outer side of the kiln head supporting wheel is provided with a kiln head retaining wheel, and the kiln head supporting wheel, the kiln head supporting ring and the kiln head retaining wheel are matched to rotate; GN-302A high-temperature reflective heat-insulating nano composite ceramic coating is sprayed on the surface of the inner layer or the surface of the outer layer of the rotary kiln cylinder.
The utility model is operated in such a way that the materials are fed into the rotary kiln cylinder through the charging hopper, and a heat source is provided for the rotary kiln cylinder by the spray gun of the kiln head; the kiln tail driving device and the kiln head driving device are unified in speed by a set of frequency converters, act on the kiln tail supporting ring and the kiln head supporting ring respectively, and then drive the rotary kiln cylinder to rotate by utilizing the interaction between the shifting fork and the corresponding steel plate; roasting or reducing the material in the rotary kiln cylinder, and discharging the material through a kiln head discharge port; and tail gas is discharged from a tail gas outlet.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (6)
1. A rotary kiln without a furnace lining made of refractory materials is characterized by comprising a rotary kiln cylinder, a charging hopper and a driving device; the driving device comprises a kiln tail driving device and a kiln head driving device;
the front end of the rotary kiln cylinder is connected with the charging hopper; a kiln tail cover is arranged at the front end of the rotary kiln cylinder body, and a tail gas outlet is formed in the kiln tail cover;
a heat-insulating layer and a heat-insulating shell are arranged outside the rotary kiln cylinder body;
a kiln tail supporting ring is arranged outside the front section of the rotary kiln cylinder, a kiln head supporting ring is arranged outside the rear section of the rotary kiln cylinder, and the kiln tail driving device drives the rotary kiln cylinder to rotate through the kiln tail supporting ring and the kiln head driving device together through the kiln head supporting ring;
a plurality of shifting forks are arranged on the inner surface of the heat-insulating shell at the kiln tail supporting ring and the kiln head supporting ring, a plurality of steel plates are arranged on the outer surface of the rotary kiln cylinder, and the free ends of the steel plates are inserted into the shifting forks;
the rotary kiln barrel is internally provided with spiral sheets, and a material raising plate is arranged between the spiral sheets;
a kiln head cover is arranged at the rear end of the rotary kiln cylinder body, and a kiln head discharge hole is formed in the kiln head cover; and a spray gun is arranged at the tail end of the kiln head cover and is introduced into the rotary kiln cylinder.
2. The rotary kiln without a refractory lining of claim 1, wherein the kiln tail driving device comprises a kiln tail motor, a kiln tail riding wheel and a kiln tail blocking wheel; the output end of the kiln tail motor is provided with a kiln tail supporting wheel, the outer side of the kiln tail supporting wheel is provided with a kiln tail retaining wheel, and the kiln tail supporting wheel, the kiln tail supporting ring and the kiln tail retaining wheel are matched to rotate.
3. The rotary kiln without a refractory lining as claimed in claim 1, wherein the kiln head driving means comprises a kiln head motor, a kiln head riding wheel and a kiln head catch wheel; the output end of the kiln head motor is provided with a kiln head supporting wheel, the outer side of the kiln head supporting wheel is provided with a kiln head retaining wheel, and the kiln head supporting wheel, the kiln head supporting ring and the kiln head retaining wheel are matched to rotate.
4. The rotary kiln without a refractory lining as claimed in claim 1, wherein the rotary kiln barrel rotates at a speed of 0.3-10 r/min.
5. The rotary kiln without a refractory lining of claim 1, wherein the rotary kiln shell is horizontally mounted or is mounted with an inclination of 30 ° upward or 30 ° downward.
6. The rotary kiln without a refractory lining as claimed in claim 1, wherein the inner layer surface or the outer layer surface of the rotary kiln cylinder is coated with GN-302A high temperature reflective heat insulation nano composite ceramic coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020171331.2U CN211503657U (en) | 2020-02-12 | 2020-02-12 | Rotary kiln without refractory material lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020171331.2U CN211503657U (en) | 2020-02-12 | 2020-02-12 | Rotary kiln without refractory material lining |
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| CN211503657U true CN211503657U (en) | 2020-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020171331.2U Active CN211503657U (en) | 2020-02-12 | 2020-02-12 | Rotary kiln without refractory material lining |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113280621A (en) * | 2021-04-24 | 2021-08-20 | 安徽省泽乾冶金科技有限公司 | Rotary kiln heat preservation mechanism |
| CN113899203A (en) * | 2021-10-11 | 2022-01-07 | 郑州大学 | Method for monitoring thickness change of refractory material of kiln lining of rotary kiln |
-
2020
- 2020-02-12 CN CN202020171331.2U patent/CN211503657U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113280621A (en) * | 2021-04-24 | 2021-08-20 | 安徽省泽乾冶金科技有限公司 | Rotary kiln heat preservation mechanism |
| CN113280621B (en) * | 2021-04-24 | 2023-08-29 | 安徽省泽乾冶金科技有限公司 | Rotary kiln heat preservation mechanism |
| CN113899203A (en) * | 2021-10-11 | 2022-01-07 | 郑州大学 | Method for monitoring thickness change of refractory material of kiln lining of rotary kiln |
| CN113899203B (en) * | 2021-10-11 | 2024-03-22 | 郑州大学 | Method for monitoring thickness change of kiln lining refractory material of rotary kiln |
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