Technological Innovation | New Energy-Saving Rotary Kiln
Published:
2025-12-03 07:56
Source:
Energy-saving rotary kiln for molybdenum-iron roasting As the most critical piece of equipment in the roasting process, this technology has reached maturity after several rounds of updates. However, during actual operation, due to limitations in its internal structure, it still faces the following issues: Drawbacks and problems ：
1. There is a significant temperature difference between the inner and outer cylinders, so an expansion device must be installed. After prolonged use, this structure may suffer from weld cracking and damage.
2. At the expansion device, the castable material must be provided with expansion joints. Since the cylinder body in this area experiences concentrated thermal expansion and deformation, the castable material is prone to detachment and damage, which can in turn cause ablation and deformation of the cylinder body.
3. After prolonged use, once the insulation material has carbonized, it becomes extremely difficult to repair or replace the insulation material. This requires dismantling the entire inner cylinder and pouring new refractory material, which means damaging the inner cylinder and necessitating its complete reconstruction. As a result, the construction period is long and the process is highly challenging.
4. The insulation layer at the expansion joint is relatively thin, resulting in poor thermal insulation performance. Additionally, the annular support flange of the inner cylinder conducts heat. Due to these two factors, a ring-shaped high-temperature zone appears on the outer cylinder.
5. The internal utilization rate of the cylinder is not high. Since the production capacity is directly proportional to the square of the effective inner diameter of the kiln body, its output is relatively low.
New energy-saving rotary kiln Change the air ducts of the rotary kiln cylinder. 、 Insulation layer structural form Having successfully addressed the issues mentioned above, the new energy-saving rotary kiln offers the following advantages compared to previous models: Advantages ：
1. For rotary kilns of the same specifications, the effective inner diameter increases. For equipment of the same specifications, production has increased by more than 20%.
2. Internal is Monolithic structure , no expansion device is installed, no There is a case of weld cracking and damage to the cylinder body.
3. The whole The cylinder expands uniformly. There is no centralized expansion and contraction zone, thus avoiding the issue of localized spalling of the castable material. Furthermore, the castable material... Thickness increases Up to 120mm, significantly Improve the service life of castables.
4. The insulation layer is located on the outside of the cylinder. Replacing or repairing the insulation layer does not require disturbing the inner cylinder or the castable material, and the replacement is performed from the outside. Easy and quick construction Quick.
5. Perform thermal insulation construction on the entire outer surface of the cylinder. , the construction effect is better and more... Ensure its thermal insulation performance.
6. The hot air after heat exchange is introduced into the rotary kiln for further processing. Increase equipment hourly output.
7. More suitable for retrofitting existing products 。
On-site images of a new energy-saving rotary kiln for molybdenum-iron roasting
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