Atmosphere-controllable rotary kiln and implementation method thereof
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A rotary kiln and atmosphere technology, applied in the field of rotary kiln, can solve problems such as difficulty in improving performance, easy to agglomerate, affect performance, etc., to achieve the effect of preventing safety accidents, avoiding agglomeration, and uniform and stable feeding
Pending Publication Date: 2020-12-29
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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Problems solved by technology
[0004] 1. Poor uniformity: when the ordinary kiln is sintered, the powder needs to be packed in a relatively fixed container, so the powder is always in a static state, and it is easy to agglomerate during sintering, making the powder density distribution uneven In turn, the powder is heated unevenly, which affects the annealing of the powder
[0005] 2. It is difficult to improve the performance: when the powder sintered in an ordinary kiln is agglomerated, it is easy to form a dense layer on the surface of the powder, which blocks the full contact between the reaction gas and the internal powder, so that the reaction cannot be fully carried out, thereby affecting the performance.
[0006] 3. Insufficient airtightness and uncontrollable atmosphere: Ordinary rotary kiln is not designed to be a completely sealed airtight design structure, so there is no feature that the atmosphere can be adjusted
Method used
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Embodiment 1
[0037] see Figure 1-7 , the present invention provides the following technical solutions: a controllable atmosphere rotary kiln, including a rotary kiln body 1, the rotary kiln body 1 includes a furnace tube 6, the inner wall of the furnace tube 6 is provided with a stirring bar 7, the stirring bar 7 is a stainless steel component, The feed end of the rotary kiln body 1 is equipped with a feed mechanism 4, the discharge end of the rotary kiln body 1 is equipped with a discharge mechanism 2, and the connection between the rotary kiln body 1 and the feed mechanism 4 is provided with an inert gas protection at the kiln mouth. Device 5, the connection between the rotary kiln body 1 and the discharge mechanism 2 is equipped with an inert gas protection device 3 at the kiln tail.
[0038] Further, the stirring bar 7 has a spiral structure.
[0039] By adopting the above-mentioned technical scheme, the powder material can be stirred indirectly with the rotation of the furnace tube ...
Embodiment 2
[0048] The difference between this embodiment and Embodiment 1 lies in: further, the stirring bar 7 is in the shape of a strip.
[0049] By adopting the above technical scheme, at least three elongated stirring bars are provided.
[0050] Further, the realization method of the controllable atmosphere rotary kiln according to the present invention includes the following steps:
[0051] (1), the material is added from the first feeding bin 41, and enters the inside of the furnace tube 6 through the second feeding bin 42 and the screw feeder 43;
[0052] (2), the reducing gas is inserted from the reducing gas inlet 34, the material is fully contacted with the reducing gas under the stirring of the rotary kiln body 1, and reacts, and the waste gas produced is discharged from the gas outlet 54;
[0053] (3), the material after the completion of the reaction enters the discharge bin 21, and is discharged after being cooled by the cooling tank 22;
[0054] (4), during the reaction,...
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Abstract
The invention discloses an atmosphere-controllable rotary kiln which comprises a rotary kiln body. The rotary kiln body comprises a furnace tube; stirring strips are arranged on the inner wall of thefurnace tube; a feeding mechanism is arranged at the feeding end of the rotary kiln body; a discharging mechanism is arranged at the discharging end of the rotary kiln body; the joint of the rotary kiln body and the feeding mechanism is sleeved with a kiln opening inert gas protection device; and the joint of the rotary kiln body and the discharging mechanism is sleeved with a kiln tail inert gasprotection device. The invention further discloses an implementation method of the controllable-atmosphere rotary kiln. According to the atmosphere-controllable rotary kiln and the implementation method thereof provided by the invention, the stirring strips are arranged on the inner wall of the furnace tube and can indirectly drive powder to be stirred along with the rotation of the furnace tube,so that the powder is in a continuous flowing state in the furnace tube, the whole powder is heated more uniformly, the agglomeration of the powder is avoided, the contact surface of the powder and reaction gas in the kiln is increased, the reaction is more sufficient, and the reacted powder has high purity and few impurities.
Description
technical field [0001] The invention belongs to the technical field of rotary kilns, and in particular relates to a controllable atmosphere rotary kiln and a realization method thereof. Background technique [0002] Market demand: With the rapid development of electronics industry, communication industry, aviation and other industries, the industry's market demand for high-performance wave-absorbing filter materials is increasing. [0003] There are following problems when producing this type of product with conventional equipment: [0004] 1. Poor uniformity: when the ordinary kiln is sintered, the powder needs to be packed in a relatively fixed container, so the powder is always in a static state, and it is easy to agglomerate during sintering, making the powder density distribution uneven In turn, the powder is heated unevenly, which affects the annealing of the powder. [0005] 2. It is difficult to improve the performance: when the powder sintered in ordinary kiln is ...
Claims
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Application Information
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