Multiple Silos Single Weigh Static Automatic Batching System

The multiple silos single weigh static automatic batching system is ideal for small and medium-sized fertilizer enterprises due to its low investment cost, high precision, and ease of operation. It utilizes a layout where multiple raw material bins share a single static weighing hopper, enabling precise batching of various materials with minimal weighing equipment. For organic and compound fertilizer processing facilities with limited capital and a limited range of raw materials, this system offers a significantly lower purchase cost than dynamic systems (which use a scale for every bin) while still meeting the precision requirements for most formulated fertilizers. With stable operation, reliable metering, and simple maintenance, it is an economical and practical choice for small and medium-sized fertilizer enterprises looking to automate batching and improve product quality.

Working Principle

During operation, raw material bins feed into the shared weighing hopper sequentially according to the preset formula. The feed quantity for each material is precisely controlled by a PLC based on signals from load cells. Feeding augers initially deliver material rapidly until reaching approximately 90% of the set value, then switch to a slow speed for precise topping-up. Once one material is measured, the next begins feeding, with the material weight in the hopper accumulating progressively. After all materials are measured, the discharge gate at the bottom of the hopper opens to release the batch into the mixing equipment. The system then automatically resets for the next batch. In this static weighing process, the system waits for the material inside the hopper to stabilize completely before recording the weight, ensuring measurement accuracy.

Investment Costs

Equipment investment primarily covers multiple material bins, corresponding feeding augers, a shared weighing hopper assembly (including load cells), a discharge valve, the control system, and a steel platform. Because the system shares a single weighing unit, it requires fewer load cells and weighing instruments and involves fewer electrical control points; consequently, the total purchase cost is approximately 30%–40% lower than that of dynamic systems with individual scales for each bin.

Installation and commissioning are straightforward; the modular structure allows for rapid on-site assembly, typically enabling the system to become operational within three to five days. Civil engineering requirements are minimal; the steel platform imposes no special demands on the foundation, requiring only sufficient factory ceiling height.

Regarding operating costs, the automated system requires only one person for monitoring, resulting in low labor expenses. Improved batching precision reduces raw material waste and ensures more consistent nutrient content, indirectly lowering costs associated with quality-related losses.

Suitable Manufacturers

This system is suitable for small-to-medium-sized fertilizer manufacturers handling up to eight types of raw materials.

It is primarily designed for small compound fertilizer plants and organic-inorganic compound fertilizer processing facilities—operations that require a baseline level of batching precision but have limited investment budgets.

It is also suitable for BB fertilizer (bulk blend) manufacturers; while these products demand high nutrient precision, static weighing systems are capable of meeting this requirement.

The system is ideal for enterprises producing a wide range of fertilizer formulations, as it offers convenient formula management.

Additionally, this multiple silos single weigh static automatic batching system can be applied to the batching of feed premixes and chemical powders.