从China供应商批发进口65%-97% Caustic Calcined Magnesite — FOB条款

Liaoning Danding Industry Group Co., Ltd produces caustic calcined magnesite with a declared MgO content range of 65% to 97%, reflecting the natural variation in magnesite ore purity and calcination intensity. The product, also termed light burnt magnesia or bitter earth powder, is obtained by calcining natural magnesite ore at 800 to 850°C, a temperature band that drives off CO2 while preserving reactivity for subsequent chemical processes. The colour variation, pink, yellow, and white, indicates differing iron content and trace impurities, with whiter grades generally corresponding to higher purity and lower iron. Buyers should specify their target MgO percentage, as the 65-97% span encompasses applications from basic construction materials to specialty chemical synthesis where purity is paramount.

The calcination temperature of 800-850°C defines this as light burnt or caustic-calcined product, distinct from dead burned magnesia (sintered above 1500°C) and fused magnesia. At this burn level, the material retains substantial reactivity with water, forming magnesium hydroxide and generating cementitious properties exploited in magnesium oxychloride and oxysulfate cements. Typical standard specifications for caustic calcined magnesite include CaO content below 2.5% for high-grade material, SiO2 below 3.5%, and Fe2O3 below 1.5%, though these thresholds shift across the purity range. Loss on ignition (LOI) typically falls between 2% and 6%, representing residual carbonates and moisture, with lower LOI indicating more complete calcination.

Application sectors span construction boards and panels where magnesite cement provides fire resistance and acoustic dampening, through to chemical processing for magnesium salt production in pharmaceuticals, rubber compounding, and paper manufacturing. The higher purity fractions, above 90% MgO, find use in electrical insulation and specialty refractory applications where iron and calcium contamination must be minimised. Liaoning Province hosts China's principal magnesite reserves, giving Danding geographic proximity to raw material but requiring buyers to verify mining rights and environmental compliance. Trade specifics including MOQ, packaging, and Incoterms are not provided in the source data and must be negotiated directly with the supplier.

Liaoning Danding Industry Group Co., Ltd is headquartered at No. 71-72, Fengcheng, Dandong, Liaoning Province, China, positioning it within the heart of China's magnesite-producing region. The company holds a 'harbor' trust tier, indicating basic marketplace verification without premium accreditation. Its response metrics show 0.00% response rate and zero average response hours, suggesting limited reliability in direct communication, a factor that demands alternative verification channels for serious procurement. The source description reveals product knowledge rather than corporate history, with no stated founding date, employee count, revenue, or facility certifications.

The supplier's operational scope, as described, spans raw material extraction through to intermediate processing, with explicit mention of calcination equipment capable of temperature-controlled production. No ISO 9001, environmental management, or mining licence documentation is referenced in available data, placing due diligence burden on the buyer. The company markets multiple magnesia product lines including caustic calcined, dead burned, and fused grades, implying some vertical integration, though the extent of in-house versus toll processing is unstated. Buyers should request site audit access or third-party inspection protocols, particularly given the geographic concentration of magnesite processing in Liaoning and associated environmental compliance scrutiny.