Pressure charging air-float type oxidation oven
An oxidation furnace and air flotation technology, applied in the field of oxidation furnaces, can solve the problems of inability to increase the driving force of alloy powder oxidation, limit oxidation efficiency, and slow oxygen diffusion speed, so as to enhance the oxidation effect, increase the driving force, and improve The effect of production efficiency
Inactive Publication Date: 2010-05-26
CENT SOUTH UNIV
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Problems solved by technology
Chinese patent CN2697557Y discloses a fluidized oxidation furnace, which can fully contact the alloy powder with oxygen, and solve the problem of slow diffusion of oxygen to a certain extent, but this equipment works under normal pressure, from the perspective of thermodynamics From a perspective, it cannot increase the driving force of alloy powder oxidation, thus limiting the further improvement of oxidation efficiency
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[0014] See attached figure 1 , the outside of the pressurized air flotation oxidation furnace is a furnace body 6 that can withstand pressure, and a barrel-shaped furnace 11 is arranged inside the furnace body 6. The top and bottom of the furnace are respectively ceramic cores 4 and 13 with holes. The diameter of the small hole set on the porous ceramic core is preferably smaller than the particle size of the alloy powder. The reactants can be directly put into the furnace, or a high-temperature resistant charging bucket with holes can be added in the furnace. During the reaction, the reactants are put into the furnace with holes. Put the charging barrel into the high temperature resistant charging barrel, and then put the charging barrel into the furnace, so as to avoid the adhesion of the alloy powder and the furnace wall. A heating element 12 is arranged in the furnace wall. In order to allow oxygen to be preheated before entering the furnace, the side wall of the furnace p...
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The invention discloses a booster air-float oxidation furnace. A furnace body (6) of the oxidation furnace is a shell which can bear pressure; the furnace body (6) is provided with a furnace hearth (11) inside; a furnace hearth wall is provided with a heating element (12) inside; the top and the bottom of the furnace hearth (11) are ventilate; a gap is reserved between the top of the furnace hearth (11) and the furnace body (6); the upper part of the top of the furnace hearth (11) is provided with a fan impeller (3); the fan impeller (3) is connected with a speed regulating motor (1) arrangedoutside the furnace body; two sides of the fan impeller (3) are provided with gas-guide tubes (5); a high-pressure air inlet pipe (9) enters the furnace body through one side of the furnace body (6);and an outer section end of the air inlet pipe (9) is provided with a valve (8). Through increasing the gas pressure of the furnace body, circular airflow is formed inside and outside the furnace hearth, reaction alloy powder can be fully contacted with oxygen under high-pressure and suspension state, thereby greatly increasing the oxidation effect and enduring the alloy powder is not attached tothe wall for hardness.
Description
technical field [0001] The invention relates to an oxidation furnace for internal oxidation treatment of alloy powder in the electric contact material manufacturing industry. Background technique [0002] Studies have shown that adding some metal oxides, such as MeO, to silver can effectively improve the strength and arc erosion resistance of silver contact materials. At present, the preparation methods of Ag / MeO contact materials mainly include powder metallurgy and alloy internal oxidation. Among them, the powder metallurgy method is prone to uneven powder mixing and tissue segregation, which affects product quality. Alloy internal oxidation method is divided into ingot oxidation method and powder oxidation method. The ingot oxidation method is to smelt Ag and Me into an alloy block first, and then heat it in an oxygen-enriched environment. Through the diffusion of oxygen in α-Ag, oxide particles are generated inside the material to play the role of dispersion strengthen...
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IPC IPC(8): F27B15/00
Inventor 易丹青李荐吴春萍王斌肖来荣
Owner CENT SOUTH UNIV