Lepidolite roasting production line in interlayer-free double-layer roller kiln

Abstract

The invention discloses an interlayer-free double-layer roller kiln lepidolite roasting production line which comprises a kiln body, a support, a heat preservation lining, a gas pipeline, gas spray guns and ceramic rollers. A heat preservation lining is fixedly connected to the inner wall of the kiln body, a support is fixedly connected to the outer wall of the kiln body, and a gas pipeline is fixedly connected to the support. A smoke exhaust area, a preheating area, a firing area, a quenching area, a heat exchange area and a tail cooling area are sequentially arranged in the kiln body, and the three layers of gas spray guns are arranged in the preheating area and the firing area; the input ends of the third layers of gas spray guns are fixedly connected with control valves in a communicating mode, and the input ends of the control valves are fixedly connected to the output ends of the gas pipelines in a communicating mode. Compared with an existing double-layer roller kiln, the interlayer-free double-layer roller kiln has the advantages that the interlayer-free design is adopted, the internal space of the kiln body is increased, smoke circulation is smoother, the temperature of the kiln body is increased faster, and therefore the production efficiency is improved; when the method is applied to the roasting production of the lepidolite, the roasting efficiency of the lepidolite can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of roller kilns, in particular to a production line for roasting lithium mica in a double-layer roller kiln without an interlayer. Background Art

[0002] The roller kiln is a continuous firing kiln, a tunnel kiln that uses rotating rollers as a vehicle for transporting the blanks. When in use, the roller kiln places the product on many closely spaced horizontal refractory rollers, and the rotation of the rollers allows the product to be transported from the head of the kiln to the tail of the kiln, solving the problem of low efficiency in traditional kiln car transportation. However, the existing double-layer roller kiln has a middle partition, which results in a small internal space of the kiln body, which is not conducive to the circulation of flue gas, and also causes a low temperature rise rate inside the kiln body, which is not conducive to improving production efficiency. In addition, in the prior art, there has been no case of applying roller kilns to the production of lithium mica. The roasting process of lithium mica still uses traditional kiln car transportation. The operating method is to stack the lithium mica bricks onto the kiln car, and then pull the kiln car into the tunnel kiln for high-temperature calcination. After the calcination is completed, the kiln car is pulled out. This process is time-consuming and affects production efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a production line for roasting lithium mica in a double-layer roller kiln without an interlayer, so as to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a production line for roasting lithium mica in a double-layer roller kiln without interlayers, comprising a kiln body, a gas spray gun and a ceramic roller, wherein two layers of ceramic rollers are installed in the kiln body, and three layers of gas spray guns are fixedly connected to the inner walls on both sides of the kiln body, and the three layers of gas spray guns are spaced apart from the two layers of ceramic rollers.

[0005] Preferably, a transmission device is installed at one end of the two layers of ceramic rollers.

[0006] Preferably, a heat-insulating lining is fixedly connected to the inner wall of the kiln body, a bracket is fixedly connected to the outer wall of the kiln body, and a gas pipeline is fixedly connected to the bracket.

[0007] Preferably, a smoke exhaust zone, a preheating zone, a firing zone, a rapid cooling zone, a heat exchange zone and a tail cooling zone are sequentially arranged in the kiln body, and three layers of gas spray guns are arranged in the preheating zone and the firing zone.

[0008] Preferably, the input end of the three-layer gas spray gun is conductively and fixedly connected to a control valve, and the input end of the control valve is conductively and fixedly connected to the output end of the gas pipeline.

[0009] The barrier-free double-layer roller kiln for roasting lithium mica production line provided by the present invention has the advantages that: compared with the existing double-layer roller kiln, the barrier-free design is adopted in the present invention, so that the internal space of the kiln body is increased, the smoke circulation is smoother, and the kiln body is heated faster, thereby improving the production efficiency; the present invention is applied to the roasting production of lithium mica, which can effectively improve the roasting efficiency of lithium mica. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 It is a schematic diagram of the overall front view cutaway structure of the present invention;

[0012] Figure 2 It is a structural block diagram of the kiln body of the present invention.

[0013] In the figure: 1. kiln body; 11. smoke exhaust area; 12. preheating area; 13. firing area; 14. rapid cooling area; 15. heat exchange area; 16. tail cooling area; 2. bracket; 3. thermal insulation lining; 4. gas pipeline; 5. gas spray gun; 6. ceramic roller; 7. transmission; 8. control valve. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] See also Figure 1-2The present invention provides an embodiment: a production line for roasting lithium mica in a double-layer roller kiln without an interlayer, comprising a kiln body 1, a gas spray gun 5 and a ceramic roller 6, wherein two layers of ceramic rollers 6 are installed in the kiln body 1, and three layers of gas spray guns 5 are fixedly connected to the inner walls on both sides of the kiln body 1, and the three layers of gas spray guns 5 are arranged at intervals from the two layers of ceramic rollers 6; a transmission device 7 is installed at one end of the two layers of ceramic rollers 6; a thermal insulation lining 3 is fixedly connected to the inner wall of the kiln body 1, a bracket 2 is fixedly connected to the outer wall of the kiln body 1, and a gas pipeline 4 is fixedly connected to the bracket 2; a smoke exhaust area 11, a preheating area 12, a firing area 13, a rapid cooling area 14, a heat exchange area 15 and a tail cooling area 16 are sequentially arranged in the kiln body 1, and the three layers of gas spray guns 5 are arranged in the preheating area 12 and the firing area 13; the input end of the three layers of gas spray guns 5 is connected and fixedly connected to a control valve 8, and the input end of the control valve 8 is connected and fixedly connected to the output end of the gas pipeline 4.

[0016] Working principle: In the present invention, the length ratio and temperature of the exhaust zone 11, preheating zone 12, firing zone 13, quenching zone 14, heat exchange zone 15 and tail cooling zone 16 are formulated according to different firing curves. According to the temperature requirements and refractory insulation requirements of different zones, corresponding refractory insulation materials are built in the kiln. The heat source is supplied by multiple low-power gas spray guns 5, the fuel is gas, the temperature is automatically controlled, and the PID control instrument and control valve 8 are used to adjust the fuel supply to control the temperature. , which belongs to decentralized control. The lithium mica bricks enter the exhaust zone 11 from the kiln head to absorb heat and heat up, thereby discharging the bound water in the lithium mica bricks. A smoke exhaust fan is provided at the kiln head, which is used to extract the smoke in the kiln. The smoke can be used as a heat source for the dryer and adjust the zero pressure point in the front of the kiln. Then the lithium mica bricks go from the exhaust zone 11 to the preheating zone 12, where the lithium mica bricks continue to heat up and produce an oxidation reaction. When they reach the firing zone 13, the lithium mica bricks continue to absorb heat and continue to produce chemical reactions. The temperature remains constant. A plurality of low-power gas spray guns 5 are evenly arranged on both sides of the kiln wall of the preheating zone 12 and the firing zone 13 to provide heat sources. The combustion-supporting fan provides combustion-supporting air for the gas spray guns 5. The gas pipeline 4 provides fuel for the gas spray guns 5. In the rapid cooling zone 14, natural wind is supplied into the kiln by the rapid cooling fan to quickly cool the fired lithium mica bricks. The heat exchange zone 15 uses indirect cooling to continue to cool the fired lithium mica bricks, so that the lithium mica bricks can smoothly complete the crystal transformation. The fan supplies cold air into the rapid cooling zone 14 and extracts it after heat exchange with the lithium mica bricks. The extracted hot air is relatively clean and can be used as a heat source for the dryer to further reduce the temperature of the bricks. The reducer drives a plurality of parallel ceramic rollers 6 through a gear transmission transmission device 7, thereby realizing the output of the lithium mica bricks from the kiln head to the kiln tail; the preheating zone 12 and the firing zone 13 adopt an arch structure with a small cross-sectional temperature difference, so that the lithium mica bricks are heated more evenly and the conversion rate of the lithium mica bricks is high.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A production line for roasting lithium mica in a double-layer roller kiln without interlayer, comprising a kiln body (1), a gas spray gun (5) and a ceramic roller (6), characterized in that: Two layers of ceramic rollers (6) are installed in the kiln body (1), and three layers of gas spray guns (5) are fixedly connected to the inner walls on both sides of the kiln body (1), and the three layers of gas spray guns (5) are arranged at intervals from the two layers of ceramic rollers (6).

2. The interlayer-free double-layer roller kiln for calcining lithium mica production line according to claim 1, characterized in that: A transmission device (7) is installed at one end of the two layers of ceramic rollers (6).

3. The interlayer-free double-layer roller kiln calcining lithium mica production line according to claim 1 is characterized in that: A heat-insulating lining (3) is fixedly connected to the inner wall of the kiln body (1), a bracket (2) is fixedly connected to the outer wall of the kiln body (1), and a gas pipeline (4) is fixedly connected to the bracket (2).

4. The interlayer-free double-layer roller kiln for calcining lithium mica production line according to claim 1, characterized in that: The kiln body (1) is provided with a smoke exhaust zone (11), a preheating zone (12), a firing zone (13), a rapid cooling zone (14), a heat exchange zone (15) and a tail cooling zone (16) in sequence, and three layers of gas spray guns (5) are arranged in the preheating zone (12) and the firing zone (13).

5. The interlayer-free double-layer roller kiln for calcining lithium mica production line according to claim 4, characterized in that: The input end of the third-layer gas spray gun (5) is connected and fixedly connected to a control valve (8), and the input end of the control valve (8) is connected and fixedly connected to the output end of the gas pipeline (4).

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