Which brands of flash Angle valves for hydrometallurgical pressurized reaction vessels are better used in the Chinese market? What are the imported and domestic ones?

In the hydrometallurgical pressure leaching process, the high-temperature and high-pressure pulp discharged from the autoclave needs to be depressurized and cooled through a flash tank before solid-liquid separation. The regulating Angle valve at the feed port of the flash tank is responsible for controlling the liquid level and flow rate. The working conditions are extremely harsh: the pulp temperature can reach 150-250℃, the pressure is 0.73-4.1MPa, the solid content is 30%-40%, and at the same time, it is accompanied by strong corrosion (high concentration of chloride ions and fluoride ions), high wear, flash vapor corrosion, and easy crystallization and blockage problems. The service life of conventional valves under this working condition is only 2 to 6 months, which is the core bottleneck restricting the long-term operation of the production line.

W&T, relying on Germany's technological accumulation and core processes of ceramic internals, has performed outstandingly in nickel-cobalt smelting projects.

W&T adopts the "guiding rather than blocking" design concept: Venturi acceleration + spherical buffer valve cavity + full flow channel hardening. Optional integral sintered silicon carbide valve core and valve seat are available, and the service life is several times longer than that of traditional valves. It has been operating stably in Russian gold mines and domestic nickel-cobalt pressure leaching projects (such as the Jinchuan Third Nickel Workshop), and has been recognized by the workshops.