In antimony smelting operations, furnace temperatures exceeding 1200°C and highly corrosive, arsenic- and sulfur-rich slags act as two major "invisible killers" for equipment. Are you currently plagued by frequent unplanned shutdowns and recurring damage to your furnace linings? Each shutdown incurs not only direct repair costs but also causes a precipitous drop in the entire production line's annual operating rate.

Core Element 1: Corrosion-Resistant and Thermal-Shock-Resistant Lining Materials

High-alumina bricks—distinguished by their high alumina content—maintain stable chemical inertness even at temperatures exceeding 1200°C, effectively resisting the penetration and erosion caused by arsenic- and sulfur-bearing slags. Furthermore, their exceptional thermal shock stability allows them to withstand the drastic temperature fluctuations associated with furnace startups and shutdowns, preventing the lining from cracking or spalling due to rapid heating and cooling cycles.

Core Element 2: Thermal Insulation and Energy Efficiency—The Wisdom of Multi-Layer Lining Design

A single refractory material rarely offers the dual benefits of strong corrosion resistance and low thermal conductivity. By adopting a multi-layer composite lining—where a working layer of high-alumina bricks directly faces the slag, an intermediate layer of lightweight insulating bricks blocks heat flow, and an outer layer of ceramic fiber boards minimizes heat dissipation—the temperature of the furnace wall's outer surface can be significantly reduced. This approach not only substantially lowers fuel consumption per ton of antimony produced but also improves the working environment surrounding the furnace, mitigating the accelerated aging of steel structures caused by thermal radiation.

Core Element 3: Abrasion Resistance—Withstanding Continuous Physical Erosion

During antimony smelting, the flow of slag, the agitation of materials, and solid particles entrained in flue gases subject the furnace lining to continuous mechanical erosion. Through high-pressure molding and high-temperature sintering, high-alumina bricks achieve a bulk density exceeding 2.9 g/cm³ and a room-temperature compressive strength of over 80 MPa, resulting in a dense and hard surface structure. Even under the repeated friction of high-velocity slag flows, they maintain a low wear rate, thereby preventing slag-penetration leakage accidents caused by localized thinning of the lining.

Selecting the appropriate refractory materials is a critical step in reducing costs and enhancing efficiency. It extends the furnace's service life and lowers overall costs—including labor for repairs, losses incurred during downtime, and spare parts procurement—while simultaneously reducing the volume of solid waste generated by the frequent disposal of spent refractories, thereby contributing to green smelting practices and sustainable development.