Hopper Silo Project Case For Wheat & Maize Storage

Project Case

1. Project Overview

To address the challenges of raw grain storage, a grain processing company invested in the construction of five cone-bottom steel silos, each 11 meters in diameter and 21 meters high, in 2024, with a total storage capacity of 8,000 tons. The project utilizes a spiral-rolled, interlocking steel silo structure with a 45° cone bottom slope, and is equipped with an automated feeding and discharging system and grain condition monitoring devices, enabling intelligent management of the entire process from unloading and storage to processing of raw grains.

2. Technical Parameters

3. Core Advantages

• High-efficiency Discharge Performance

The conical bottom structure allows materials to automatically converge to the central discharge port at the bottom of the silo by gravity, reducing the amount of cleaning work by 80% compared to flat-bottom silos. Actual operation data shows that the emptying time of a single silo is reduced from 48 hours in traditional silos to 12 hours, and the residual amount is controlled within 0.5%, significantly improving production continuity.

• Intelligent Grain Condition Management

The grain storage facility is equipped with 32 temperature monitoring points and 8 humidity sensors, which monitor the temperature distribution of the grain pile in real time via an IoT platform. The system has an anomaly warning function, automatically initiating ventilation and cooling when the local temperature exceeds 30°C. During the high-temperature summer of 2025, the rate of grain quality deterioration decreased by 92% compared to the previous year.

• Space Utilization Optimization

The prefabricated structure, using bolted connections, has a construction period of only 60 days, shortening the construction time by 50% compared to concrete silos. It saves 65% of the floor space compared to traditional single-story warehouses, doubling the storage capacity within the limited space of the factory area, significantly improving land use efficiency.

4. Operational Performance Analysis

• Economic benefits

 Storage loss rate reduced from 3.8% to 0.9%, reducing grain loss by approximately 280 tons annually.

 Automated systems replaced 6 workers, saving 680,000 yuan in labor costs annually.

 Energy consumption reduced by 30%, saving 150,000 yuan in electricity costs annually.

• Management Improvement

By integrating with the ERP system, inventory data is updated in real time, reducing raw material turnover days from 28 days to 14 days and capital occupation by 42%. The intelligent control system reduces the labor intensity of warehouse staff by 70% and the human error rate by 95%.

5. Application Experience Summary

This project validated the technological advantages of conical-bottom steel silos in bulk grain storage, making them particularly suitable for grain processing enterprises requiring frequent turnover. Subsequent projects are advised to pay attention to the following key points:

 The angle of the conical bottom should be designed based on the material's angle of repose; for sticky materials, a slope of 45° or higher is recommended.

 Anti-arching devices should be installed to prevent material blockage at the transition section of the conical bottom.

 Regularly check the verticality of the silo and the sealing performance of the seams to ensure structural safety.

Through this practice, the company established a standardized steel silo operation and maintenance system, providing a replicable technical solution for subsequent expansion projects.