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How to choose the right bottom for grain steel silo

In conclusion, the selection of the bottom design in grain steel silo is influenced by several fundamental factors, including the flow and storage capacity, economic viability, structural design, and cost implications.

Key Considerations for Choosing the Bottom Design of Grain Steel Silo

In the realm of grain steel silo products, two primary types of bottom designs exist: cone-bottom and flat-bottom. Each has its own set of advantages. The cone-bottom silo excels in quick and efficient material flow but has a limited storage capacity. In contrast, the flat-bottom silo offers a larger storage capacity and is generally more suitable for large-scale grain storage, albeit with slower discharge rates. Today, let’s discuss the key considerations for selecting the bottom form of grain steel silo.

How to choose the right bottom for grain steel siloHow to choose the right bottom for grain steel silo

Consideration One: Material Flow and Storage Capacity

The bottom design of a steel silo significantly impacts the flow of materials and the overall storage capacity. Cone-bottom silos are preferable from a process and usage perspective due to advantages such as no grain residue and no need for cleaning equipment. However, their application is economically limited, as they are typically suitable for silos with a diameter of less than 10 meters and a capacity not exceeding 1,500 metric tons.

Consideration Two: Economic Viability

From an economic standpoint, the use of cone-bottom silos is constrained. For larger diameter steel silo, the bottom form is determined by the natural flow angle of the stored material. The smaller the natural flow angle of the material, the greater the height of the cone. Grain typically has a natural flow angle of around 40 degrees. Therefore, as the diameter of the steel silo increases, so does the height of the foundation’s supporting beams.

Consideration Three: Structural Design and Cost

Taking the example of a 15-meter diameter cone-bottom steel silo, to meet the process requirements of the equipment below the silo, the height of the foundation’s supporting ring beam is at least 8 meters or more. Coupled with the large storage capacity and the weight of the material, the increased structural support, heightening, and changes in the bottom design lead to a foundation cost that is more than 40% higher than that of a flat-bottom silo with the same capacity.

How to choose the right bottom for grain steel siloHow to choose the right bottom for grain steel silo

Consideration Four: Diameter and Capacity Constraints

Analysis shows that for larger diameter and capacity steel silo, the choice of silo shape significantly affects the foundation’s cost. Therefore, when the diameter of the steel silo is greater than 10 meters, it is advisable to prioritize flat-bottom steel silo. This choice ensures the same level of performance while substantially reducing the engineering cost.

Conclusion: The Impact of Bottom Design Selection

In conclusion, the selection of the bottom design in grain steel silos is influenced by several fundamental factors, including flow and storage capacity. It also considers economic viability, structural design, and cost implications. When the diameter and capacity of the steel silo are large, opting for a flat-bottom design can offer a more cost-effective solution. This choice does not compromise the silo’s functionality.

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