Calcined Manganese Carbonate for Industrial Brick Coloring
Short Product Description
Calcined manganese carbonate is used as a stable manganese source for brick and ceramic coloration. With controlled Mn content (≥44%), it ensures consistent color development in industrial brick manufacturing. Suitable for clay body blending and high-temperature firing processes.
Technical Specifications
| Parameter | Typical Value |
|---|---|
| MnCO₃ Purity | ≥ 98% |
| Manganese (Mn) Content | ≥ 44% |
| Particle Size | 80–200 mesh |
| Moisture | ≤ 1.5% |
| Bulk Density | 0.9–1.3 g/cm³ |
| Loss on Ignition (Calcined) | Controlled |
| Iron (Fe) | ≤ 0.05–0.10% |
| Calcium (Ca) | ≤ 0.30% |
| Magnesium (Mg) | ≤ 0.30% |
| Lead (Pb) | ≤ 10 ppm |
| Arsenic (As) | ≤ 5 ppm |
| Cadmium (Cd) | ≤ 5 ppm |
Key Features
Stable manganese source for consistent brown, purple, and black brick coloration
Calcined manganese carbonate improves color uniformity after high-temperature decomposition
Controlled Fe, Ca, Mg impurities reduce color deviation and improve reproducibility
Low heavy metals (Pb, Cd, As) for environmental and construction compliance
Uniform particle size ensures even dispersion in clay mixtures
Calcined manganese carbonate for industrial brick coloring supports scalable production consistency
Applications
Brick manufacturing – provides controlled brown to dark coloration in fired clay bodies
Roof tiles and ceramic tiles – enhances color stability and long-term durability
Facing bricks – enables uniform aesthetic appearance across batches
Clay body pigmentation – calcined manganese carbonate decomposes to active oxides during firing, influencing final color tone
Construction materials – used in colored concrete and decorative building elements
Problems This Product Solves
Inconsistent brick coloration → stable Mn content ensures repeatable color results
Uneven pigment dispersion → controlled particle size improves mixing uniformity
Excess iron affecting final color → low Fe reduces unwanted reddish or muddy tones
Color instability during firing → calcined form improves thermal behavior and consistency
Variability in clay raw materials → standardized additive ensures predictable output
Packaging & Supply
25 kg kraft paper bags with PE liner
Palletized export packaging
Available for 20GP / 40HQ container shipment
Samples available for brick formulation and kiln testing
Customization & Technical Support
Adjustable manganese (Mn) content based on color intensity requirements
Low-iron (Fe) grade available for high-purity color control
Custom particle size for different clay processing methods
Technical support for brick formulation and firing optimization
FAQ
1. How does calcined manganese carbonate affect brick color?
Calcined manganese carbonate decomposes during firing to form manganese oxides, which generate brown, purple, or black tones depending on kiln conditions. The calcined form improves consistency in color development.
2. Why is Fe content important in manganese carbonate for bricks?
Excess iron can shift brick color toward red or muddy tones. Controlled Fe levels help maintain clean and predictable brown or dark shades.
3. What dosage is typically used in brick production?
Typical addition ranges from 1% to 6% depending on the desired color intensity and clay composition. Higher dosages produce darker shades.
4. Is calcined manganese carbonate compatible with different clay types?
Yes, it can be used with red or light-burning clays. However, final color depends on clay composition, especially iron content and firing temperature.
5. How does calcined manganese carbonate compare to manganese dioxide?
Manganese carbonate offers better dispersion in raw mixes and converts to active oxides during firing, while manganese dioxide is often used directly as a pigment. Both are used in brick coloration depending on process requirements.