Magnesium Oxide (MgO), commonly referred to as magnesia, is a highly versatile inorganic material with a melting point of approximately 2852°C (5166°F). In global heavy industry and chemical manufacturing, sourcing bulk Magnesium Oxide powder from a reliable manufacturer requires a deep understanding of mineral processing, calcination methods, chemical purity indexes, and particle morphology.
Caustic Calcined Magnesia (CCM) is typically processed at temperatures between 700°C and 1000°C. Possessing high chemical reactivity, CCM is critical in wastewater treatment, agricultural fertilizers, desulfurization systems, and Sorel cement formulations. High-quality CCM from China is categorized by its citric acid activity value.
Sintered or Dead-Burned Magnesia (DBM) is calcined at temperatures exceeding 1400°C to 2000°C. This intensive heat treatment renders the MgO chemically inert, maximizing its resistance to hydration and slag attack. DBM is primarily utilized in refractory linings for steel manufacturing furnaces, cement kilns, and glass production plants.
Produced through electric arc furnace melting of high-grade magnesite or CCM at temperatures above 3000°C. Fused Magnesia exhibits superior crystalline structure, high density, and exceptional electrical insulation and thermal conductivity properties. It is the premier component in heating elements and high-performance structural refractories.
Technical Insight: Purity levels typically range from 80% to 99.5% MgO. In high-end electrical and industrial applications, keeping trace impurities such as silica (SiO₂), lime (CaO), and iron oxide (Fe₂O₃) under strict control is critical to maintain structural and chemical integrity.
Yanxatech System Industries Limited (hereinafter referred to as YANXA) is one of the growing suppliers in the field of specialty materials in China. Starting from a fledgling small business unit in 2008, YANXA has been driven with the passion of developing a broad international market in the areas relating to chemical and mechanical industries. Thanks to our team's enduring, persistent work and our business partners' long-lasting support, YANXA has steadily and vigorously grown into an enterprise with excellence in delivering premium products and technical services.
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Cooperating with leading manufacturers and renowned research institutes in the field of specialty chemicals in China, YANXA is highly capable of supplying a diverse product portfolio:
China is the world's leading producer of raw magnesite ore, with the largest concentration of reserves located in Liaoning Province (particularly in Haicheng and Dashiqiao). Partnering with a Chinese manufacturer for bulk Magnesium Oxide offers unparalleled economic and chemical processing advantages:
With direct proximity to high-grade magnesite mining districts, Chinese factories bypass international transportation costs for raw ore. This guarantees a steady production cycle, impervious to geopolitical raw material volatility, and allows for continuous processing of both macrocrystalline and microcrystalline ores.
Modern Chinese plants utilize automated shaft kilns, suspension calciners, and electric arc furnaces. This enables manufacturers to control critical chemical properties like particle size distribution (PSD), specific surface area (BET), and citric acid activity (CAA) with extreme accuracy.
Due to highly integrated production systems, Chinese bulk manufacturers offer highly competitive pricing. Economies of scale allow plants to run continuous calcining operations, passing cost savings to global industrial buyers purchasing in bulk container volumes.
Procuring Magnesium Oxide in bulk requires balancing custom product parameters against the chemical specifications of the target application. Industrial applications differ widely in their requirements for chemical purity, mineral structure, and hydration tendencies:
| Application Sector | Preferred MgO Grade | Key Chemical / Physical Requirements | Critical Parameters to Monitor |
|---|---|---|---|
| Hydrometallurgy (e.g., Cobalt/Nickel Extraction) | Caustic Calcined Magnesia (CCM) | Controlled reactivity index (CAA 60-120s), low iron (Fe) contamination. | Hydration rate, precipitant efficiency. |
| Agriculture & Animal Feed | Agricultural Grade CCM | High bio-available Magnesium (>54% Mg), extremely low Heavy Metals (As, Pb, Cd). | Heavy metal levels compliance (FAMI-QS). |
| Refractories & Metallurgy | Sintered / Fused Magnesia | Purity: 97%-98% MgO minimum, high bulk density (>3.40 g/cm³). | SiO₂:CaO ratio, hydration resistance. |
| Electrical Insulators & Heating Elements | High-Purity Fused Magnesia (FM) | Purity: >99% MgO, negligible iron and boron content. | Leakage current, high-temperature resistivity. |
| Specialty Rubber & Plastics Compounding | High-Activity Synthetic MgO | Ultra-fine particle size (D50 < 5 μm), high specific surface area (>120 m²/g). | Acid acceptance capacity, dispersion index. |
Moving bulk chemical powders across borders requires robust regulatory compliance. A professional Chinese exporter must not only produce high-quality materials but also manage complex international regulations:
Our partner facilities maintain verified ISO 9001:2008 and updated ISO 9001:2015 certifications. We track every batch from the initial magnesite quarrying stage through calcination, grinding, and shipping, ensuring strict trace metal and silica controls.
For European Union and North American markets, our products comply with REACH regulations. Standard Safety Data Sheets (SDS) are provided according to GHS regulations to ensure smooth customs clearance and safe handling.
MgO is naturally hygroscopic. We use multi-wall paper bags, PE-lined PP woven bags, and big-bags (jumbo bags 1000kg to 1250kg) with specialized moisture barrier liners. Container desiccant kits are standard for long ocean voyages.
In addition to Magnesium Oxide and alloy powders, YANXA provides comprehensive technical support and supply pipelines for organic intermediates. Here are the core specifications of our primary chemical lines:
Characteristics: Colorless liquid, easily polymerized, and highly soluble in water, alcohol, and ether. In air, it is rapidly oxidized to formic acid, acting as a strong reducing agent. Boiling point is -19°C, freezing point -118°C, and relative density to air is 1.067.
Commercial Form: Supplied as formalin, a 37% to 50% solution, containing methanol as a polymerization inhibitor. Boiling point is 96°C, relative density is 0.815 (-20°C), and flash point is 55°C.
Overview: Also known as Hexamine or HMTA, it is a white crystalline powder produced by the condensation reaction of formaldehyde and ammonia. It is a highly versatile organic intermediate used in resin manufacturing, pharmaceutical synthesis, and rubber vulcanization.
Key Data: CAS No. 100-97-0 | Molecular Formula: C₆H₁₂N₄ | Molecular Weight: 140.19 g/mol.
Product Features: A white, flammable, crystalline solid with a characteristic formaldehyde odor. It is a linear polymer of formaldehyde without a sharp, fixed melting point.
| Item | Premium Specification | Standard Specification |
|---|---|---|
| Content | ≥96% | ≥92% |
| Solubility | ≤40 minutes | ≤40 minutes |
| Formic Acid | ≤0.05% | ≤0.05% |
| pH Value | 5 - 7 | 5 - 7 |
At YANXA, quality, safety, and efficiency shape all values in our business. We align with our customers' needs for standard bulk materials, and respond rapidly to unique requirements for new and highly specialized applications. We adhere strictly to technical requirements and deliver materials in precise conformity to agreed parameters.
Chemical logistics and manufacturing involve strict safety protocols. YANXA manages all chemical operations to protect human health and minimize environmental impacts. We work with certified hazardous materials logistics networks and shipping companies to ensure compliance with transport codes.
Q: What are your bulk Magnesium Oxide powder prices?
A: Our prices are subject to change depending on supply, raw material ore costs, energy pricing for calcination, and other market factors. Once your company contacts our sales team with your purity and quantity requirements, we will provide an updated, customized price list.
Q: Do you have a minimum order quantity (MOQ)?
A: Yes, we require all international orders to meet a minimum order quantity (typically 1 Full Container Load [FCL] for bulk powders). If you are looking to purchase smaller trial quantities, please contact our export department for custom coordination.
Q: Can you supply the relevant technical and export documentation?
A: Yes, we provide full technical documentation, including Certificates of Analysis (COA) for every batch, Certificates of Conformance, Marine Insurance Certificates, Certificates of Origin, and all mandatory dangerous goods declaration paperwork for international ports.
Q: What is the average lead time for production and shipping?
A: For sample verification, the lead time is approximately 7 days. For mass production and bulk packaging, the standard lead time is 20-30 days after receiving the deposit payment and receiving final approval. If our proposed schedule does not match your project timeline, please consult our team to explore potential expedited manufacturing runs.
Q: What payment terms do you accept?
A: We accept bank transfers with a 30% deposit in advance and the remaining 70% balance against the copy of the Bill of Lading (B/L) by T/T, or via an irrevocable Letter of Credit (L/C) at sight.
Q: How do you guarantee moisture protection and safe delivery?
A: We use high-strength export packaging, incorporating moisture-proof PE liners inside woven PP bags. For hazardous or temperature-sensitive goods, we implement custom insulated containers and specialized protective packaging to ensure safe delivery.
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