【Ten Years of Rapid Development in Chemical Processing Equipment】High-temperature glanded valves for alumina extraction processes using fly ash from 1965 to 2016

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Witness the decade-long rapid development of chemical processing equipment; praise the prosperity and strength of modern China. Replies will be rewarded – discussions are welcome. ------------------------------------------- In December 2016, special valves developed by Unit 11 of the Sixth Academy of China Aerospace Science and Technology Corporation for Shenhua Group passed the acceptance tests. These valves are the only ones in the world capable of operating under extreme conditions of 160 degrees in strong acidic media, with technology that ranks at the international leading level. This valve is used in the industrial system for extracting alumina from fly ash. This system requires a large number of valves to control acidic fluid media, and these valves must possess high resistance to corrosion by hot hydrochloric acid as well as strong resistance to erosion; this represents a global challenge that has consistently hindered the development of industrial systems for aluminum oxide extraction using acid-based methods. Through technical innovation, Institute 11 of the Sixth Academy has mastered key technologies such as high-temperature clamp valves for the alumina extraction process system using fly ash. It is understood that clamp valves have distinct advantages in transporting solids and liquids containing abrasive and corrosive substances such as particles, powders, fibers, and viscous pastes, and they hold broad application prospects in industries such as mining and metallurgy, mineral processing, pulp and paper manufacturing, chemical production, and the energy sector. The successful development of this valve will lay a solid foundation for meeting the demand for control valves of various specifications and applications in industrial systems for extracting alumina from fly ash, as well as for enabling industrial production.