Cooling type rotary kiln head cover suitable for calcium aluminate
By using circulating water pipes and grate cooling devices in the calcium aluminate-cooled rotary kiln kiln head cover, the problem of high-temperature materials damage the screen strip of the kiln head cover during fire recycling and disposal is solved, the durability of the screen strip and the convenient cleaning of large pieces of materials are achieved, and the production cost and maintenance difficulty are reduced.
Patent Information
- Application Number
- CN202420370071.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-28
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-02-28
AI Technical Summary
When recycling and disposing of secondary aluminum ash by ignition, the high-temperature materials generated after sintering damage the screen strip at the bottom of the kiln hood, and large pieces of high-temperature materials accumulate on the screen strip, causing the screen strip to break, increasing production costs and maintenance difficulties.
Calcium aluminate cooling rotary kiln head cover is used to replace the traditional stainless steel flat iron screen strips as the circulating water pipe, and a grate cooling device is installed on the water pipe. The cooling water of the circulating water pipe is used to cool down to prevent high-temperature materials from breaking. At the same time, the water pipe is tilted to facilitate cleaning of large pieces of materials.
It effectively avoids screen strip breaks, reduces production accidents and costs, and simplifies the cleaning process of large pieces of materials through the design of inclined water pipes and improves production efficiency.
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of metallurgical equipment, in particular to a kiln head cover of a rotary kiln suitable for calcium aluminate cooling. Background Art
[0002] Secondary aluminum ash is produced in the smelting process of recycling metallic aluminum from primary aluminum ash with high aluminum content. Its components have high recycling value, but secondary aluminum ash also contains a large amount of toxic and harmful substances such as fluoride, cyanide, aluminum carbide, aluminum nitride, etc., which will cause serious environmental pollution to the recycling of secondary aluminum ash. Therefore, pyrometallurgy and hydrometallurgy are usually used to recycle and dispose of secondary aluminum ash. When pyrometallurgy is used to recycle and dispose of secondary aluminum ash, the temperature of the material produced after sintering is as high as 300-400℃. The material with too high temperature will damage the screen bar at the bottom of the kiln head cover. At the same time, some large pieces of high-temperature materials will be produced during the sintering process. Because their size is larger than the mesh size of the screen bar, large pieces of high-temperature materials are accumulated on the screen bar and cannot fall into the silo below, making it very difficult to recycle. In addition, the high-temperature materials are accumulated on the screen bar for a long time, which is easy to cause the screen bar to break, which greatly increases the replacement frequency of the screen bar, increases production costs, and reduces production efficiency.
[0003] Therefore, it is necessary to provide a kind of calcium aluminate cooling type rotary kiln head cover to solve the above-mentioned technical problems. Utility Model Content
[0004] The utility model aims to provide a kiln head cover of a calcium aluminate cooling rotary kiln in view of the shortcomings of the prior art, which does not require frequent replacement of screen bars and reduces production costs.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A kiln head cover of a calcium aluminate cooling rotary kiln comprises a rotary kiln body, a kiln head cover and a silo arranged below the kiln head cover, a discharge port of the rotary kiln body is communicated with the rear end of the kiln head cover and extends to the inside of the kiln head cover, a grate cooling device is arranged below the discharge port, the grate cooling device is fixedly connected to the inner bottom of the kiln head cover, the grate cooling device comprises a plurality of circulating water pipes arranged side by side at equal intervals, the fixing direction of the circulating water pipes is arranged perpendicularly to the opening direction of the discharge port, the circulating water pipes are arranged at an inclination of 1-3° with the horizontal plane, the high position of the circulating water pipes is set as a water inlet end, the low position of the circulating water pipes is set as a water outlet end, the water outlet end of the circulating water pipes is provided with a "J"-shaped water outlet, the water outlet end and the water inlet end of the circulating water pipes both penetrate the side wall of the kiln head cover and extend to the outside of the kiln head cover, the spacing between adjacent circulating water pipes is 300-500mm, and an inspection door is opened on the side wall of the kiln head cover where the water outlet end is arranged.
[0007] Preferably, the circulating water pipe is a hollow steel pipe with a wall thickness of not less than 20 mm.
[0008] Preferably, the water inlet end of the circulating water pipe is connected to the water outlet end of the water pump.
[0009] Compared with the prior art, the utility model has the following advantages:
[0010] 1. The screen bars originally made of stainless steel flat iron are replaced with circulating water pipes. When the high-temperature materials after sintering fall on the circulating water pipes, the circulating water pipes are affected by the cooling of the internal cooling water and will not break due to high temperature, thus avoiding production accidents caused by screen bar breakage and reducing production costs.
[0011] 2. Set the circulating water pipe at an angle. When large pieces of material accumulate on the circulating water pipe, the inclined surface can be used to send the material to the inspection door more easily, making it easier for personnel to clean it and saving manpower. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is the front view of the utility model;
[0013] Figure 2 It is a top view of the utility model;
[0014] Among them, 1-rotary kiln body, 2-kiln head cover, 3-silo, 4-circulating water pipe, 5-inspection door DETAILED DESCRIPTION
[0015] The present invention is further explained below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that these implementation methods are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.
[0016] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixed connection" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.
[0017] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "bottom", "top", etc. are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention. They do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.
[0018] like Figure 1 to Figure 2 As shown, a kiln head cover of a rotary kiln suitable for calcium aluminate cooling comprises a rotary kiln body 1, a kiln head cover 2 and a silo 3 arranged below the kiln head cover. The discharge port of the rotary kiln body is connected with the rear end of the kiln head cover and extends to the inside of the kiln head cover. A grate cooling device is arranged below the discharge port. The grate cooling device is fixedly welded to the bottom of the inner side of the kiln head cover. The grate cooling device comprises six circulating water pipes 4 arranged side by side at equal intervals. The circulating water pipes are hollow steel pipes with a wall thickness of not less than 20 mm. The fixing direction of the circulating water pipes is perpendicular to the opening direction of the discharge port. The circulating water pipes are parallel to the horizontal plane. It is inclined at 1-3°, the high position of the circulating water pipe is set as the water inlet end, the low position of the circulating water pipe is set as the water outlet end, the water outlet end of the circulating water pipe is provided with a "J"-shaped water outlet, the "J"-shaped water outlet can make the cooling water of the circulating water pipe discharge more smoothly, the water outlet end and the water inlet end of the circulating water pipe both penetrate the side wall of the kiln head cover and extend to the outside of the kiln head cover, the water inlet end of the circulating water pipe is connected with the water outlet end of the water pump, the water pump provides cooling water to the circulating water pipe, the spacing between adjacent circulating water pipes is 300-500mm, and the side wall of the kiln head cover provided with the water outlet end is provided with an inspection door 5.
[0019] The principle and use method of a kiln head cover suitable for a calcium aluminate cooling rotary kiln: when the secondary aluminum ash is recovered and disposed of by pyrometallurgy, the water pump is started to send cooling water to each circulating water pipe. When the high-temperature material after sintering is sent out from the discharge port, it falls onto each circulating water pipe. Small pieces of high-temperature material fall into the silo under the kiln head cover through a grate cooling device, and large pieces of high-temperature material accumulate between two adjacent circulating water pipes. When the pyrometallurgical operation is completed, the worker opens the inspection door and uses tools to recover the accumulated large pieces of material along the inclined circulating water pipe in preparation for further processing.
[0020] The above description shows and describes the preferred embodiments of the utility model. As mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.
Claims
1. A kiln head cover of a calcium aluminate cooling rotary kiln, comprising a rotary kiln body, a kiln head cover and a material bin arranged below the kiln head cover, characterized in that: The discharge port of the rotary kiln body is connected with the rear end of the kiln head hood and extends to the inside of the kiln head hood. A grate cooling device is arranged below the discharge port and fixedly connected to the inner bottom of the kiln head hood. The grate cooling device comprises a plurality of circulating water pipes arranged side by side at equal intervals. The fixing direction of the circulating water pipes is perpendicular to the opening direction of the discharge port. The circulating water pipes are inclined at 1-3° to the horizontal plane. The high position of the circulating water pipes is set as the water inlet end, and the low position of the circulating water pipes is set as the water outlet end. The water outlet end of the circulating water pipes is provided with a "J"-shaped water outlet. Both the water outlet end and the water inlet end of the circulating water pipes penetrate the side wall of the kiln head hood and extend to the outside of the kiln head hood. The spacing between adjacent circulating water pipes is 300-500mm. The side wall of the kiln head hood provided with the water outlet end is provided with an inspection door.
2. The kiln head cover of a calcium aluminate cooling rotary kiln according to claim 1, characterized in that: The circulating water pipe is a hollow steel pipe with a wall thickness of not less than 20 mm.
3. The kiln head cover of a calcium aluminate cooling rotary kiln according to claim 1, characterized in that: The water inlet end of the circulating water pipe is communicated with the water outlet end of the water pump.