Vertical large-capacity high-efficiency intermediate frequency furnace and production method thereof

Abstract

The invention relates to a vertical type vanadium nitrogen alloy heating furnace, in particular to a vertical type large-capacity high-efficiency medium-frequency furnace and a production method thereof. A fully-automatic charging and discharging mode is adopted, one-time production yield is high, and a metal reducing process and a metal nitriding process are completed in a furnace body once. After being mature, furnace burden can be cooled to a temperature of about 650 DEG C along with the furnace, so that a crucible can be withdrawn from a medium-frequency furnace, and enters a cooling room to be subjected to secondary cooling; and a second crucible can immediately enter the furnace body for production, so that production is efficient, and energy resources are saved. A charging and discharging device with double gates is additionally arranged, so that automatic charging and discharging of materials are realized in case of not affecting atmosphere in the furnace; and a furnace body cooling section which is quick in cooling and is relatively independent is designed, so that reacted materials can be quickly cooled, and therefore, the production period is shortened.

Description

Technical field [0001] The invention relates to a vertical vanadium-nitrogen alloy heating furnace, in particular to a vertical large-capacity high-efficiency intermediate frequency furnace and a production method thereof. Background technique [0002] There are many production methods of vanadium-nitrogen alloy. The main process is to mix vanadium raw materials with carbon powdering agent and binder uniformly and press them into balls, then send them into the furnace for heating, and obtain vanadium-nitrogen alloy products through reduction and nitriding processes. From the distinction of equipment, its production methods are mainly divided into pusher kiln method and intermediate frequency furnace method. [0003] As a relatively mature production process, the push-slab kiln method has its own advantages. The method is produced under non-vacuum conditions, which can realize simple and fast production of vanadium-nitrogen alloys, and also achieve a higher degree of automation. Ho...

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Problems solved by technology

However, the pushing plate kiln method also has major disadvantages: high energy consumption, high loss, poor sealing, difficult to adjust the nitrogen pressure in the furnace, and low nitrogen content in the product. The space in the furnace is mainly horizontal space, and the nitrogen distribution space is wide. Low utilization rate, large floor area, long overhaul time, high cost of capital

At the same time, the process of flue gas discharged from the top has to pass through the material, and the heat of the flue gas can play a role in heating the material, which improves the energy utilization. In comparison, this process has certain advantages in reducing production energy consumption and nitrogen consumption. However, the current vertical intermediate frequency furnace adopts manual assisted gravity feeding to produce poor continuity. After the heating process is completed, the charge is cooled along with the furnace body. The furnace body has good thermal insulation and a small heat dissipation area.

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