Hard alloy mixing material vibration drying method and device

Abstract

The invention relates to a drying method and a device for cemented carbide mixture. The method adopts a steam jacket to heat the cemented carbide mixture so as to make the temperature of the cemented carbide mixture rise, and to make the liquid grinding medium change into gaseous state so that the liquid grinding medium can be separated from cemented carbide powder; when the cemented carbide mixture is heated inside a sealed system in the sated of vacuum, the gaseous grinding medium is condensed into liquid in the state of vacuum. The equipment is composed of a steam vibrating drying device, a vacuum pipe, a condensing plant, a vacuum pump and a recovery drum. The gas outlet of the steam vibrating drying device is connected with the condensing plant, the recovery drum and the vacuum pump in order by the vacuum pipe, which forms a sealed vacuum system. The gasified grinding medium can be separated from the powder fast and completely by vacuum drawing without adopting spraying method to discharge exhaust gas and no powder sprays out. Thus, the invention saves precious resources and purifies the production environment, can also avoid the powder contacting the air and solves the problem that the oxygen of the material is easy to be increased.

Description

technical field [0001] The invention relates to a drying method and device for cemented carbide mixture, in particular to a vibration drying method and device for fine and ultrafine grain cemented carbide mixture. Background technique [0002] As the "teeth" of industry, cemented carbide is gradually expanding its application fields and playing an increasingly important role. In the production process of cemented carbide, it is necessary to dry the mixed slurry to separate the powder in the slurry from the grinding medium, obtain the grade powder required by the process, and safely recover the grinding medium. Common slurry drying processes include: : Spray drying, vacuum drying, vibration drying, etc. [0003] Spray drying uses hot nitrogen to directly heat the slurry droplets sprayed into the tower to separate the grinding medium from the slurry, so as to achieve the purpose of drying the material and recovering the grinding medium. It can complete the drying and granulat...

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Problems solved by technology

[0006] This method has the advantages of convenient operation and less one-time investment. However, since the material has no nitrogen or vacuum protection in the process, it is easy to oxidize with air, so its oxygen content is higher than the above two methods, especially for fine particles and Ultra-fine particle materials, due to their high chemical activity, are prone to oxidation reactions with air, making it even more difficult to control their oxygen content, and due to the need for spraying operations, material waste will inevitably result and seriously pollute the working environment

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