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2026

Application of High-Specific-Surface-Area Calcium Hydroxide in Flue-Gas Desulfurization in the Glass and Ceramic Industry

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The glass and ceramics industries rely on high‑temperature kiln firing to melt raw materials. Fuel combustion and raw material decomposition generate sulfur‑containing flue gases that are both hot and highly viscous, containing silicate dust. This dust readily adheres to the surface of desulfurization agents, deactivating their catalytic performance. As a result, conventional agents have short service lives and require frequent replacement. High‑specific‑surface‑area calcium hydroxide, with its well‑developed porosity and strong anti‑adhesion properties, is ideally suited to the unique flue‑gas conditions found in glass and ceramic kilns.

Most glass‑ceramic manufacturers employ a semi‑dry spray‑drying desulfurization process, in which high‑specific‑surface calcium hydroxide powder is mixed with atomized water to form fine droplets that rapidly penetrate the high‑temperature flue gas stream. The porous structure resists adhesion of silicate dust, while the internal reaction channels remain active, ensuring continuous desulfurization. This reagent exhibits exceptional high‑temperature stability, remaining intact and effective even in 800°C flue gases, making it well suited to kiln operations that require uninterrupted production. Moreover, the reagent does not generate colored sludge, thereby preventing environmental contamination within the plant site.

Industrial practice has demonstrated that, when high‑specific‑surface‑area calcium hydroxide is employed at glass and ceramic plants, flue‑gas desulfurization efficiency can reach 92%, the reagent‑replacement cycle is extended by a factor of two, and labor‑intensive replacement costs are significantly reduced. The desulfurization product is dry and loose, facilitating easy collection and cleanup, with no wastewater discharge, thereby meeting the clean‑production requirements of ceramic and glass manufacturing facilities. The reagent exhibits excellent storage stability, resisting moisture‑induced caking, making it well suited for bulk storage and use in small and medium‑sized kiln operations. With its tailored compatibility to the high‑temperature flue gases typical of light‑industry processes, this high‑specific‑surface‑area calcium hydroxide supports the glass and ceramics sector’s transition toward low‑carbon, environmentally friendly production.

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