Import Bauxite-Based Sintered Mg-Al Spine — Buy in Bulk from Supplier in China

The bauxite-based sintered Mg-Al spinel from Henan Rongann Thermo-technical New Materials Co., Ltd. is a synthetic refractory aggregate produced by sintering magnesia and alumina raw materials derived from bauxite at temperatures exceeding 1,800 °C. This process yields a spinel phase with the general formula MgAl₂O₄, characterised by the supplier as possessing strong anti-erosion capability, corrosion resistance, slag resistance, and thermal shock resistance. The extreme sintering temperature promotes solid-state reaction and densification, producing a microstructure with low porosity and high direct bond content between spinel grains.

Typical Mg-Al spinels for refractory use exhibit bulk densities from 3.20 to 3.40 g/cm³, apparent porosity of 3-8%, and alumina contents spanning 60-80% depending on the magnesia-to-alumina ratio. The supplier's bauxite-based route implies alumina enrichment relative to sea-water magnesia-based spinels, with correspondingly higher refractoriness under load but potentially different thermal expansion behaviour. Standard specifications for sintered spinel refractory grain include chemical analysis of Al₂O₃, MgO, SiO₂, Fe₂O₃, and CaO; mineralogical phase content; and physical properties including bulk density, apparent porosity, and cold crushing strength. Henan Rongann does not publish these values in the listing, so buyers should request a detailed certificate of analysis.

Primary applications include high-performance refractory castables and bricks for steel ladle linings, cement rotary kiln transition zones, and non-ferrous metal smelting vessels where combined chemical attack and thermal cycling occur. The spinel's intrinsic resistance to basic and acidic slags makes it suitable for positions where dolomitic or magnesite bricks would react, and where alumina-rich materials would suffer corrosion. Buyers are typically refractory manufacturers, steel mills, and cement producers seeking raw material consistency for formulated products. Trade terms, packaging formats, and minimum order quantities require direct confirmation with the supplier.

Henan Rongann Thermo-technical New Materials Co., Ltd. is located in Zhuangzi, Yangshao Town, Mianchi County, Sanmenxia City, Henan Province, China. This location in western Henan places it near significant bauxite reserves in the Xiaoyi-Bauxite Belt, one of China's primary refractory raw material deposits. The supplier holds imported tier and harbour trust tier classifications. The response rate is recorded at 0.00% with zero average response hours, indicating no tracked buyer engagement through platform channels.

The company profile does not disclose founding date, employee count, production capacity, revenue figures, or specific certifications. The source description contains unverifiable claims including ISO and SGS certifications, flexible MOQ, and FOB/CIF shipping terms, but these are presented in generic marketing language without documentary evidence or specific values. Buyers should treat these as unconfirmed until validated directly. The supplier's focus on thermo-technical new materials suggests specialisation in high-temperature refractory and ceramic materials, but independent verification of manufacturing capability, quality management system certification, and testing infrastructure is necessary before procurement commitment.