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Potassium Sulfate Fertilizer Production Line

Potassium Sulfate Fertilizer Production Line

Potassium sulfate fertilizer production line uses the Mannheim process, a widely used method for producing high-quality potassium sulfate. As a premium, chlorine-free potash fertilizer, potassium sulfate plays a key role in improving crop quality and enhancing a plant's resistance to stress. The production line uses potassium chloride and concentrated sulfuric acid as primary raw materials to efficiently produce potassium sulfate products that meet agricultural needs.
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Potassium Sulfate Fertilizer Production Line
Process Flow
Process Flow
Mannheim Furnace Parameters & Benefits
Control Item Technical Parameter Mechanism
Reaction Temperature 500–600℃ Balances the reaction rate with equipment lifespan.
Furnace Body Material High-temperature specialty steel (corrosion-resistant to HCl) Prevents corrosion from high-temperature acidic gases.
Structural Design A unique stirring system (irregular rake teeth that push from inside to out) Ensures uniform mixing and heating of raw materials.
Process Advantages
  • Product Purity: ≥95% (agricultural grade standard)
  • Raw Material Adaptability: Compatible with potassium chloride and sulfuric acid from various sources.
  • Environmental Performance: HCl recovery rate >98%, with near-zero wastewater discharge.
  • Automation Level: DCS system achieves linked control of temperature, feeding, and tail gas treatment.
The final product can be either powdered or granular.
Powdered potassium sulfate
Powdered potassium sulfate
Granular potassium sulfate
Granular potassium sulfate
Case Studies

50,000-ton/year potassium sulfate production line in Shihezi, Xinjiang.

Case Studies
Case Studies
Case Studies
Case Studies
Case Studies

40,000-ton/year potassium sulfate production line at Hubei Xiangqing Group.

Case Studies
Case Studies
Case Studies
Case Studies
Case Studies
Other Fertilizer Manufacturing Line

We use high-quality refractory bricks from Shandong Lunai and Wuxi, which have a longer service life. Our bricklayers are also highly experienced, with over a decade of professional furnace-building experience.

If a customer requires acid byproducts, we can sell them at a low price. Otherwise, the acid can be absorbed and reused for other products, such as de-icing agents.

If your goal is under 20,000 tons, we recommend building a facility designed for 20,000 tons. This will make it easier to upgrade in the future.

  • HCl recovery process: We use a water absorption method: HCl + H₂O → Hydrochloric acid (concentration ≥31%).
  • Byproduct application: The resulting hydrochloric acid can be used for metal cleaning, chemical synthesis, and other applications.

  • Cooling & solidification: We use controlled air or water cooling to prevent crystal stress cracks.
  • Purification & impurity removal: We use a vibrating screen to remove coarse particles (target size 0.1–4mm) and recrystallization to reduce chlorine residue (for high-purity products).
  • Packaging specifications: Automated packaging has a weight error of ≤0.5% and a stacking error of ≤5mm.