Method for preparation of vanadium nitrogen alloy by pusher kiln technique

A vanadium-nitrogen alloy and double-push plate kiln technology, which is applied in lighting and heating equipment, furnace types, furnaces, etc., can solve the problems of not being able to achieve large-scale industrial production, and achieve the goals of improving service life, product purity, and reducing equipment investment Effect

Active Publication Date: 2015-07-22
西峡县中嘉合金材料有限公司
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Problems solved by technology

Other production methods are in the experimental stage and cannot achieve large-scale industrial production

Method used

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Embodiment Construction

[0010] The pusher kiln method for preparing vanadium nitrogen alloy adopts double pusher kiln equipment, and the furnace structure of the double pusher kiln includes a kiln cavity, a cover plate, a side wall and a track. The kiln chamber is longitudinally provided with a low-temperature section, a transition section, a high-temperature section and a cooling section. The low-temperature section has 5 temperature zones, that is, 1-5 temperature zones, and the inner cavity side wall, cover plate and track are all made of graphite; the transition section has 4 temperature zones, that is, 6-9 temperature zones, of which 6-8 temperature zones The side wall and track of the cavity are made of high-purity magnesia bricks, and the cover plate is made of graphite. The side wall, cover plate and track of the inner cavity of the 9 temperature zone are all made of graphite; In the natural cooling zone and the forced cooling zone, the inner cavity side wall, cover plate and track of the hig...

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Abstract

The invention discloses a method for preparation of vanadium nitrogen alloy by a pusher kiln technique. The method adopts double-pusher kiln equipment. The hearth structure of the double-pusher kiln consists of a kiln cavity, a cover plate, a side wall and a track. The kiln cavity is longitudinally provided with a low temperature section, a transition section, a high temperature section and a cooling section in order. The low temperature section has 5 temperature zones, the transition section has 4 temperature zones, and the high temperature section is provided with 7 temperature zones. The cooling section falls into a natural cooling area and a forced cooling area. Heating element jacks are disposed at corresponding positions on side wall bricks of the temperature zones, so that heating elements and the kiln cavity can be separated. The method for preparation of vanadium nitrogen alloy by the double-pusher kiln consists of: mixing raw materials evenly and making the mixture into a ball, sending the ball into the double-pusher kiln, introducing nitrogen to maintain micro-positive pressure constantly in the kiln, subjecting the ball to carbonization and nitridation reaction in the kiln, performing cooling in nitrogen atmosphere to obtain a vanadium nitrogen alloy product, cooling the product gradually and discharging the product. The method provided by the invention can lower equipment investment and simplify the operation process, can realize continuous production, and significantly improves the production efficiency.

Description

technical field [0001] The invention belongs to the technical field of metal smelting, and in particular relates to a method for preparing a vanadium-nitrogen alloy by a pusher kiln method. Background technique [0002] Vanadium-nitrogen alloy is a new alloy additive that can replace ferrovanadium for the production of microalloyed steel. The addition of vanadium nitride to steel can improve the comprehensive mechanical properties of steel such as strength, toughness, ductility and thermal fatigue resistance, and make the steel have good weldability. When the same strength is achieved, the addition of vanadium nitride saves 30-40% of the amount of vanadium added, thereby reducing the cost. At present, there are two companies that can realize the commercial production of vanadium nitride. One is the VAMETCO company of the American Strategic Minerals Corporation in South Africa. Its production method is only its patented method - high temperature vacuum discontinuous producti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/02C22C1/10F27B9/12
Inventor 石民安石文安石拓何静宇
Owner 西峡县中嘉合金材料有限公司
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