JM28 Lightweight Mullite Refractory Insulation Brick | High-Temp Energy-Saving | Shijiazhuang Hongtao Technology

Shijiazhuang Hongtao Technology Co., Ltd., a professional high-tech enterprise based in Zhengding County, Shijiazhuang, Hebei, China, specializes in R&D, manufacturing and customization of JM28 lightweight mullite refractory insulation bricks—core energy-saving, high-temperature insulation materials for industrial kilns, furnace linings and high-temperature equipment. Our JM28 bricks are widely favored for their lightweight, heat-insulating and corrosion-resistant properties, ideal for thermal insulation systems in ceramic, glass and petrochemical industries.

As a high-performance lightweight insulating product, JM28 brick is made of high-purity mullite raw materials with Al₂O₃ content ≥60% and Fe₂O₃ ≤1.0%, produced via pore-forming, precision molding and high-temperature sintering[1][3]. It has a bulk density of 0.6-1.2g/cm³, cold crushing strength of 1.0-3.5MPa, and excellent thermal stability with ≤0.3% linear shrinkage at 1400℃ for 12 hours[1].

With low thermal conductivity (0.18-0.56 W/m·K at 200-600℃), it reduces industrial furnace energy consumption by 18-25% and cuts heat loss effectively[1][3]. It features superior thermal shock resistance, chemical inertness and lightweight design, is asbestos-free, resists acid and alkali corrosion, and ensures a clean working environment[3][4].

Widely applied in ceramic kilns, glass furnaces, petrochemical reactors and metallurgical equipment as insulation linings or back insulation layers[1][4], it supports standard size (230×114×65mm) and customized solutions. Shijiazhuang Hongtao adheres to innovation, delivering high-quality JM28 lightweight mullite refractory insulation bricks for global industrial partners.