Granular Manganese Carbonate for Sustained-Release Nutrients
Short Product Description
Granular manganese carbonate is a controlled-release manganese (Mn) source with Mn content ≥44%, designed for agricultural nutrient applications.
The granular form improves handling and enables sustained micronutrient availability in soil systems.
Technical Specifications
| Parameter | Typical Value |
|---|---|
| MnCO₃ Purity | ≥ 98% |
| Manganese (Mn) Content | ≥ 44% |
| Particle Size | 1–4 mm granules |
| Moisture | ≤ 1.5% |
| Bulk Density | 1.2–1.6 g/cm³ |
| Solubility in Dilute Acid | ≥ 95% |
| Iron (Fe) | ≤ 0.05–0.1% |
| Calcium (Ca) | ≤ 0.3% |
| Magnesium (Mg) | ≤ 0.3% |
| Lead (Pb) | ≤ 10 ppm |
| Arsenic (As) | ≤ 5 ppm |
| Cadmium (Cd) | ≤ 5 ppm |
Typical MnCO₃ products maintain Mn content around 44% with controlled impurity levels such as Fe, Ca, Mg, and heavy metals
Key Features
- Granular structure enables sustained-release nutrient behavior and reduced leaching
- Stable manganese source with consistent Mn content ≥44%
- Controlled Fe, Ca, Mg impurities to minimize nutrient antagonism
- Low heavy metals (Pb, Cd, As) for fertilizer safety compliance
- Uniform particle size improves blending in compound fertilizers
- Suitable for use as granular manganese carbonate for sustained-release nutrients in soil systems
Applications
- Micronutrient fertilizers – provides slow-release manganese for long-term soil availability
- Compound NPK fertilizers – compatible with granulation processes and bulk blending
- Soil amendment – corrects manganese deficiency in alkaline or depleted soils
- Specialty fertilizers – used in controlled-release formulations to reduce nutrient loss
- Horticulture and cash crops – supports enzyme activity and chlorophyll synthesis
Problems This Product Solves
- Rapid nutrient loss in soluble Mn fertilizers → granular form enables sustained release
- Low manganese availability in alkaline soils → improves gradual Mn supply to roots
- Excess iron interference in micronutrient blends → controlled Fe content improves uptake
- Heavy metal contamination risks → low Pb, Cd, As ensures compliance
- Dusting and poor handling of powders → granules improve storage, transport, and application
Packaging & Supply
- 25 kg kraft paper bags with PE liner
- Palletized export packaging
- 20GP / 40HQ container shipment
- Sample available for fertilizer formulation testing
Customization & Technical Support
- Adjustable Mn content based on fertilizer formulation
- Low-iron (Fe-controlled) grades available
- Custom granule size (1–5 mm)
- Technical support for fertilizer blending and agronomic application
FAQ
What is the advantage of granular manganese carbonate vs powder?
Granular manganese carbonate provides better handling and reduced dust during fertilizer production. It also enables slower nutrient release compared to fine powders, improving utilization efficiency.
How does manganese carbonate provide sustained-release nutrients?
Manganese carbonate has low water solubility, allowing gradual dissolution in soil. This supports continuous manganese availability rather than rapid nutrient loss.
Why control Fe, Ca, and Mg impurities?
Excess Fe, Ca, and Mg can interfere with manganese uptake in plants. Controlled impurity levels improve micronutrient balance and absorption efficiency.
What are the heavy metal limits for fertilizer-grade MnCO₃?
Typical limits include Pb ≤10 ppm, Cd ≤5 ppm, and As ≤5 ppm. These are critical for environmental safety and regulatory compliance.
Is granular manganese carbonate compatible with compound fertilizers?
Yes, it is suitable for NPK blending and granulation processes. Its uniform particle size ensures consistent distribution in fertilizer formulations.