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 JM23 mullite refractory bricks, core high-temperature insulation materials for industrial kilns and high-temperature equipment.

As a high-performance insulating refractory brick, JM23 mullite brick is made of high-purity mullite raw materials with Al₂O₃ content of 42%-45% and Fe₂O₃ ≤1.0%, produced via high-temperature sintering and precision molding[1][2]. It has a bulk density of 0.6-1.2g/cm³, cold crushing strength of 1.0-3.5MPa, and excellent thermal stability with ≤0.5% linear shrinkage at 1200℃ for 12 hours[1][5].

With low thermal conductivity (0.18-0.56 W/m·K at 200-600℃), it achieves remarkable energy-saving effects, reducing heat loss effectively[1][5]. It features superior thermal shock resistance, chemical inertness and lightweight design, resisting acid and alkali corrosion, and ensuring a clean working environment with low impurity content[2][9].

Widely applied in ceramic kilns, glass furnaces, petrochemical reactors and metallurgical equipment as insulation linings or back insulation layers[2][7][8], it supports standard size (230×114×65mm) and customized solutions. Shijiazhuang Hongtao adheres to innovation, delivering high-quality JM23 mullite refractory bricks for global industrial partners.