Grain Storage Equipment — Safe, Pest-Proof, Moisture-Proof, Long-Term Storage
Flat-bottom, cone-bottom, and square silos plus full conveying and temperature-control systems · annual output over 1,000,000 m³ · complete storage solutions from small farms to large collection centers
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.
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 |
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.