{"id":2161,"date":"2026-07-03T08:02:50","date_gmt":"2026-07-03T08:02:50","guid":{"rendered":"https:\/\/hanmetallurgy.com\/?post_type=product&p=2161"},"modified":"2026-07-03T08:02:50","modified_gmt":"2026-07-03T08:02:50","slug":"vd-vod-vacuum-refining-furnace","status":"publish","type":"product","link":"https:\/\/luzixinzuonew.han-light.com\/index.php\/product\/vd-vod-vacuum-refining-furnace\/","title":{"rendered":"VD\/VOD Vacuum Refining Furnace"},"content":{"rendered":"
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VD\/VOD Vacuum Refining Furnace<\/h1>\n
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Ultra-Clean Steel Production by HANI Metallurgy<\/p>\n<\/div>\n

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The Pinnacle of Vacuum Metallurgy Technology<\/h2>\n

The VD\/VOD Vacuum Refining Furnace<\/strong> is the definitive equipment for producing high-purity, ultra-clean steel grades required for demanding applications in the aerospace, automotive, and nuclear industries. As a specialized VD Vacuum Degasser<\/strong> and VOD furnace<\/strong>, it employs vacuum technology to remove dissolved gases (hydrogen, nitrogen), carbon, and sulfur from molten steel. At HANI<\/strong>, we have developed advanced vacuum refining<\/strong> systems that combine deep vacuum capabilities with high-intensity argon stirring and oxygen blowing. Our steel treatment<\/strong> solutions are designed for maximum productivity and consistency, ensuring that your steel products meet the highest international purity standards.<\/p>\n

A HANI VD\/VOD Vacuum Refining Furnace<\/strong> integrates a vacuum tank or car-type tank, a vacuum lid with a water-cooling system, and a multi-stage steam ejector or mechanical pump system. The VOD furnace<\/strong> variant further includes an oxygen lance system for vacuum decarburization, making it ideal for the production of ultra-low carbon stainless steels. By utilizing our vacuum refining<\/strong> technology, producers can significantly improve steel toughness, ductility, and service life. As a global leader in steel treatment<\/strong>, HANI ensures that every VD\/VOD Vacuum Refining Furnace<\/strong> provides a stable and efficient refining platform for batch sizes from 5 to 300 tons.<\/p>\n<\/div>\n

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Metallurgical Functions of HANI VD\/VOD Systems<\/h2>\n
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Functionality<\/th>\nOperational Mode<\/th>\nTechnical Objective<\/th>\n<\/tr>\n<\/thead>\n
Vacuum Degassing<\/td>\nVD \/ VOD<\/td>\nRemoval of [H] \u2264 1.5ppm and [N] \u2264 50ppm.<\/td>\n<\/tr>\n
Decarburization<\/td>\nVOD<\/td>\nAchieving ultra-low [C] \u2264 0.01% in stainless steel.<\/td>\n<\/tr>\n
Desulfurization<\/td>\nVD \/ VOD<\/td>\nDeep [S] removal via basic slag reaction.<\/td>\n<\/tr>\n
Alloying<\/td>\nVD \/ VOD<\/td>\nVacuum alloy addition and micro-adjustment.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

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Scientific Principles of Vacuum Refining<\/h2>\n

The performance of a VD\/VOD Vacuum Refining Furnace<\/strong> is based on Sieverts’ Law and the principles of gas-liquid kinetics. In a VD Vacuum Degasser<\/strong>, the reduction of ambient pressure significantly increases the driving force for gas removal from the molten steel. HANI’s vacuum refining<\/strong> technology maximizes the gas-liquid interface area by utilizing high-flow bottom argon stirring, ensuring rapid and complete degassing in the steel treatment<\/strong> hearth.<\/p>\n

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Primary Gas Removal Reactions:<\/p>\n

1. 2[H] \u2192 H2<\/sub>(g) (Hydrogen Removal)
\n2. 2[N] \u2192 N2<\/sub>(g) (Nitrogen Removal)
\n3. [C] + [O] \u2192 CO(g) (Vacuum Decarburization in VOD)<\/p>\n<\/div>\n

Scientific facts from HANI<\/strong>‘s metallurgical studies indicate that the decarburization reaction in a VOD furnace<\/strong> is significantly enhanced by the low partial pressure of CO gas. This allows for the production of ultra-low carbon alloys without oxidizing the expensive chromium. Our vacuum refining<\/strong> systems also facilitate deep desulfurization by maintaining a high-basicity slag and vigorous stirring in the steel treatment<\/strong> ladle, achieving the lowest inclusion levels in the final product.<\/p>\n<\/div>\n

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Key Advantages of HANI Vacuum Refining Technology<\/h2>\n