An ultra-high temperature nitriding continuous tunnel furnace

Abstract

The invention discloses an ultra-high-temperature nitriding continuous tunnel furnace. The furnace comprises an aerobic charging area, a feeding area, a furnace body and a discharging area, wherein the areas are connected in sequence to form a rectangular loop structure, and the areas are independent from one another; the feeding area, the furnace body and the discharging area are of a sealed cavity structure, and the aerobic charging area is of a non-sealing structure; and rails are laid in all the areas, and the materials enter and exit from the areas in a one-way mode. The sintering temperature of the ultra-high-temperature nitriding continuous tunnel furnace can reach 2000 DEG C, and the unique annular structure layout realizes the full-automatic closed circulation of the materials ascompactly as possible, rapid cooling and independent feeding and discharging of the materials in the furnace can be realized, the size is small, and the atmosphere in the furnace is uniform; the circulating production process of discharging the material at one end and feeding the material at the other end can be realized, and the nitriding process of the batch materials is realized; hydraulic propelling is adopted, the whole process is controlled by computers, manual intervention is not needed, and automatic continuous operation is realized; and the furnace is stable and reliable in material running, high in safety performance and low in labor intensity.

Description

technical field [0001] The invention relates to the technical field of firing equipment, in particular to an ultra-high temperature nitriding continuous tunnel furnace. Background technique [0002] Some rare earth materials, silicon nitride products, other carbon-containing products, carbides, and nitride materials need to be sintered at a high temperature of 1600-2000 ° C in a vacuum or an oxygen-free protective atmosphere. The existing high-temperature nitriding furnace that can reach a sintering temperature of 2000°C is only a batch-type sintering furnace. During the sintering process, the furnace temperature needs to be raised from room temperature to the required temperature. Take out the product. It consumes a lot of electricity and time from heating up to taking out the product. However, the existing continuous tunnel furnaces currently on the market use silicon-molybdenum rods as heating elements, and the sintering temperature is generally lower than 1600°C, which...

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Problems solved by technology

[0004] In view of the above analysis, in order to solve the above problems, the present invention proposes an ultra-high temperature nitriding continuous tunnel furnace with a unique structural layout, which overcomes the fact that the sintering temperature of the high-temperature nitriding furnace of the existing sintering equipment is generally lower than 1600°C, and the entire furnace body is not sealed well. Well, the air in the furnace is not easy to expel and clean, the atmosphere in the furnace is not uniform, and the products are not sufficiently nitrided, and continuous operation is realized.

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