Grain Silos for Corn & Wheat —
Safe, Pest-Proof, Moisture-Proof, Long-Term Storage
Corn silos, wheat & paddy silos · flat-bottom, cone-bottom (hopper), and square steel silos · conveying & temperature control · annual output over 1,000,000 m³
Why choose steel silos?
Compared with traditional concrete silos, steel silos offer a short build cycle (weeks vs. months) and a controlled unit cost, and they can be relocated, expanded as needed, and sealed tightly — core advantages. Hot-dip galvanized steel plate ensures a 15–25 year service life. Combined with a temperature-controlled ventilation system, grain can be stored safely for 1–3 years without spoiling.
Storing corn? See our dedicated corn silo page — silo selection, specifications, and aeration systems for grain corn stor
Four silo types covering every scenario from farm to national reserve
| Silo type | Bottom form | Capacity range | Key advantage | Application |
|---|---|---|---|---|
| Flat-bottom steel silo | Flat bottom | 50–20,000+ t | Large diameter and capacity, lowest unit cost | Grain depots, port transshipment, long-term storage |
| Cone-bottom steel silo | 45°/60° cone bottom | 5–2,000 t | Gravity discharge, no residue | Feed mills, flour mills, raw-material silos for processors |
| Square steel silo | Flat bottom | Custom | Space-saving, indoor installation, flexible combination | Raw/finished goods silos at processors, indoor storage |
| Insulated steel silo | Flat/Cone bottom | Custom | Prevents condensation and mold, constant-temperature storage | Areas with extreme temperature swings, long-term seed storage |
I. Flat-Bottom Steel Silos — The Economical Choice for Large Capacity
Flat-bottom steel silos are the mainstream choice for large-scale storage. The body is assembled on site from galvanized corrugated steel plate with high-strength bolts, with diameters from 5.5 m to 31.4 m and a single-silo capacity exceeding 20,000 tonnes. Widely used in grain depots, port transshipment, oil, flour, and brewing industries.
Key advantages: all-bolt assembly with no on-site welding, fast installation, and relocatable; modular design for phased capacity expansion; complete ventilation, temperature, and humidity monitoring systems for safe storage.
Representative specifications
| Silo diameter (m) | Eave height range (m) | Capacity range (t) | Typical application |
|---|---|---|---|
| 7.3 | 3.7–22.0 | 120–1,200 | Small/medium collection points, cooperatives |
| 12.8 | 5.5–31.4 | 500–5,000 | County grain depots, reserve silos for processors |
| 18.3 | 7.3–31.4 | 1,500–12,000 | Provincial reserve depots |
| 24.0 | 7.3–31.4 | 2,500–18,000 | Port transshipment, large grain enterprises |
| 31.4 | 9.2–31.4 | 5,000–20,000+ | National strategic grain reserves |
The full diameter range spans 5.5 m–31.4 m across 15 specifications, with a 30° roof angle. Larger diameters and capacities are available on request. Contact our engineers for model selection.
II. Cone-Bottom Steel Silos — The Efficient Choice for Gravity Discharge
The defining feature of cone-bottom steel silos is complete gravity discharge using the material's own weight, leaving no residue after unloading and needing no manual handling or extra sweeping equipment — saving both power and labor, with lower foundation cost. An ideal choice for feed mills, flour mills, oil plants, seed storage, and the chemical industry.
Representative models
| Model | Diameter (m) | Approx. height (m) | Volume (m³) | Capacity (t) |
|---|---|---|---|---|
| AGT-TCZ305-3 | 3.05 | 7.5 | 29.7 | 22.3 |
| AGT-TCZ457-3 | 4.57 | 8.5 | 68.0 | 51.0 |
| AGT-TCZ550-4 | 5.5 | 10.0 | 120.0 | 90.0 |
| AGT-TCZ730-5 | 7.3 | 13.0 | 250.0 | 187.5 |
| AGT-TCZ910-5 | 9.1 | 15.0 | 400.0 | 300.0 |
The full cone-bottom range covers diameters 1.8 m–9.1 m across 17 models. A small farm feed-tower series (AGT-WX, 2.6–54 t) is also available, contact our sales team.
III. Square Steel Silos, Maximizing Space Utilization
The greatest advantage of square steel silos is extremely high space efficiency — the square cross-section can be mounted flush against walls and combined side by side smoothly, achieving maximum storage in a limited footprint, for indoor or outdoor installation. Widely used in grain processing as raw-material buffer silos, intermediate silos, and finished-goods silos.
Representative specifications
| Model series | Cross-section (m²) | Layer range | Approx. height (m) | Volume range (m³) |
|---|---|---|---|---|
| 5CZ-25X7 | 25 (5×5m) | 7 | 8.0 | ~95 |
| 5CZ-25X13 | 25 (5×5m) | 13 | 11.0 | ~196 |
Square silo cross-section and height are fully customizable without fixed-mold limits. Auxiliary equipment includes bottom centrifugal fans (4-72 type), a multi-point temperature system, level indicators, and sweeping augers. Contact our engineers to design a specific solution based on your site and material characteristics.
IV. Insulated Steel Silos
An insulation layer (fiberglass wool / polyurethane foam / rock wool) is added to the outside wall of a standard steel silo, with a profiled galvanized color plate as the protective skin. This effectively solves condensation and mold in regions with large temperature swings, delivering concrete-silo-level insulation at lower cost and faster construction. Available as standard or airtight insulated silos, suited to Central Asia, Russia, northern China, and other areas with large day-night temperature differences, as well as long-term storage of temperature-sensitive high-value materials such as seed.
Auxiliary systems: storage is more than just a silo
A complete storage solution is far more than the silo body. AmGrainTech supplies full auxiliary equipment from intake to discharge (Sinograin-listed products):
Conveying & elevating
Bucket elevators TDTG series (15–1,500 t/h), enclosed scraper conveyors TGSS series (25–1,600 t/h), air-cushion belt conveyors QDJ/SQDJ series (50–4,500 t/h), screw conveyors TLSS series. All Sinograin-listed, sized to any silo group.
Temperature-controlled ventilation
Bottom centrifugal fans + roof induced-draft fans + intelligent ventilation control cabinet. Multi-point temperature cables monitor in-silo grain temperature in real time, with auto-alarm and fan start on over-temperature. A recirculation fumigation system is optional for forced, even gas distribution and pest control.
Cleaning & dedusting
Cylinder pre-cleaners (SCQY, 10–300 t/h), vibrating screens (TQLZ, 20–260 t/h), destoners (TQSF, 4.5–30 t/h), magnetic separators (TCXT, 5–75 t/h). Dedusting: high-pressure pulse MC(Y) / low-pressure pulse TBLM, ≥99% efficiency.
Auxiliary machinery
Hydraulic tipping platforms (fast truck unloading), sweeping augers (flat-bottom silo cleaning), rotary distributors (material routing across silos), elevator head towers (galvanized all-bolt structure + stairs + maintenance platform).
Major customers
Long-term domestic partners: COFCO Group, Yihai Kerry (Wilmar), Beidahuang Group, Hualiang Group, National Grain Reserve, Wens Group, Muyuan Group, Haid Group, New Hope Group, Jinmailang, Keming, White Elephant, Xiangnian, Jinshahe
Overseas exports: South Africa, Indonesia, Laos, Thailand, Russia, Kenya, Bangladesh, the Philippines, and 30+ other countries
Service & warranty
| Service item | Commitment |
|---|---|
| Warranty period | 1-year warranty |
| Technical support | Lifetime free technical support |
| On-site response | Response within 24–48 hours |
| Spare parts | Common spare parts stocked long-term |
Storing corn? Dedicated corn silo guide
For long-term corn storage, see our dedicated corn silo page — flat-bottom silos from 120 t to 20,000+ t and hopper-bottom holding silos for processors, with aeration, temperature monitoring and cleaning systems.
Not sure which silo type and capacity to choose?
Tell us your grain type, expected storage volume, and turnover frequency, and our engineers will recommend the most economical storage solution.