Should a static batching scale or a dynamic batching scale be used for the automatic batching of pot

For a product with high precision requirements like potassium sulfate formula fertilizer, it is essential, certain and undoubtedly necessary to choose the "static batching scale".

I. How does a dynamic batching scale work: Materials (such as nitrogen, phosphorus, and potassium fertilizers) move in the conveyor belt or screw, and the scale measures the weight in a dynamic state. Just like you are stir-frying the vegetables in the pan while pouring the soy sauce bottle into it, estimating the amount by feeling and the flow rate.

Advantages: Fast speed, capable of continuous feeding without interruption, suitable for the transportation of single raw materials with low requirements for proportioning accuracy (such as only coal).

Disadvantage: Poor precision! Because material impact and speed changes can both affect the reading, the error is usually large (±0.5%-±1% or even higher).

How does a static batching scale work: There is an independent weighing hopper under each silo. When batching, the silo first places the material into the weighing hopper, then stops completely (this is called "static"), and when the scale stabilizes, read an accurate weight. After mixing, unload it into the mixer.

Advantage: Extremely high precision! Because there is no movement interference, the scale reads very accurately when at rest, and the error can be easily controlled within ±0.1%-±0.2%.

Disadvantage: The speed is slightly slower than that of dynamic scales because it is batch operation (weighing one batch before moving on to the next).

Ii. Why must static scales be used for formula fertilizers? (Core reason

What you are making is "formula fertilizer", which means:

Formula is the lifeline: The selling point of your product lies in the precise ratio of nitrogen, phosphorus, potassium and trace elements. If a dynamic scale is used, with an error of 1% for each raw material, the total nutrient content of the final product may deviate far from the formula when several raw materials are added up, and it will be an unqualified product.

2. Characteristics of potassium sulfate: Potassium fertilizer usually has a large specific gravity and good fluidity. During dynamic transportation, it is more prone to impact and errors. Static scales can completely eliminate this influence.

3. Cost control: Potassium fertilizer is relatively expensive. Precise ingredient mixing directly saves money and avoids waste caused by excessive application.

In a word: Using a dynamic scale to prepare formula fertilizer is like conducting a chemical experiment with one's eyes covered. It simply cannot guarantee that the components of each batch of products are the same. It is the static scale that is truly "making formulas".

Iii. Guide to Avoiding Pitfalls and Key Points for Selection

When you go to buy a "static batching scale", pay attention to the following points to avoid being deceived

1. Clarify the structure: Directly ask, "Does each silo have an independent static weighing hopper?" " If the other party is evasive and says something like "weigh while walking", be on guard that it is a dynamic scale.

2. Focus on "sensors" and "instruments" :

Sensor: It is the "heart" of the scale. It is required to use well-known brands (such as domestic Keli and foreign Mettler-Toledo), with good stability.

The instrument: It is the "brain" of the scale. It is necessary to be able to set the "fast and slow feeding" function: first, quickly feed the material to 90% of the target value, then switch to a slow fine flow and precisely add it to 100%. This is the key to high precision!

3. The material must be stainless steel: Potassium sulfate is corrosive. The material of the entire weighing hopper and contact parts must be SUS304 stainless steel to prevent rust and contamination of the fertilizer.

4. A written commitment to accuracy must be made: The contract must clearly state that "the static batching accuracy reaches ±0.2%FS(or higher)". FS refers to the full scale. For instance, for a 100kg scale, the error must not exceed 0.2kg.

Summary: Your demand (potassium sulfate formula fertilizer) is the absolute advantage area of static batching scales. Spending a little more on a better static scale is protecting your formula, your brand reputation and your long-term profits. This investment is definitely worth it!