RH furnace dehydrogenation method and device

Abstract

The invention discloses an RH furnace dehydrogenation method and device, and relates to the technical field of RH refining. The RH furnace dehydrogenation method specifically comprises the following steps: 1, initial conditions; 2, baking; 3, vacuumizing treatment; 4, vacuum heating; 5, vacuum dehydrogenation treatment; 6, vacuum decarburization treatment; 7, measuring; and 8, vacuum breaking. TheRH furnace dehydrogenation method is simple in process, convenient to operate and lower in cost, molten steel can be heated at the same time in RH vacuum treatment, the degassing temperature of the molten steel is guaranteed, the dehydrogenation efficiency is improved, each of an ascending pipe and a descending pipe in a dehydrogenation device is of a conical structure with a large bottom openingand a small top opening, scouring of the molten steel to the inner wall of a vacuum chamber can be reduced, the dehydrogenation effect of the device is effectively improved, the ascending pipe and the descending pipe in the design are good in corrosion resistance and high temperature resistance, and the service life is longer.

Description

technical field [0001] The invention relates to the technical field of RH refining, in particular to an RH furnace dehydrogenation method and device. Background technique [0002] The full name of RH refining is RH vacuum circulation degassing refining method. RH system equipment is a secondary refining process equipment for molten steel used to produce high-quality steel. RH is used in the converter process because it adopts the technology of circulating molten steel in a vacuum tank to achieve short processing time, high efficiency, and matching with converter continuous casting. Mass adoption. [0003] RH vacuum treatment is one of many refining methods outside the furnace. Its main task is degassing, and through the circulation of molten steel, non-metallic inclusions are floated, and the composition and temperature of molten steel are uniform. Carbon, desulfurization, dephosphorization, composition fine-tuning and many other metallurgical functions. [0004] The hydr...

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Problems solved by technology

The second is to cause a large number of fine crack defects inside the steel—white spots, which are smooth and silvery white spots on the end surface of the steel, which will also cause white spots inside the steel, which will significantly reduce the elongation of the steel, especially the shrinkage and impact of the end surface. The toughness is reduced even more, therefore, the dehydrogenation treatment of molten steel is very important

[0005] However, the RH furnace dehydrogenation method currently on the market has a complicated operation process, high cost, unsatisfactory dehydrogenation efficiency, and the molten steel is prone to drop in temperature during the degassing process, which affects the dehydrogenation rate of the molten steel. At the same time, the existing RH furnace The structure of the furnace dehydrogenation device is complex, and the immersion pipe and the inner wall of the vacuum chamber are prone to corrosion during long-term use, which reduces its service life

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