Ceramic raw material dry method granulation production line and production technology

Abstract

The invention relates to a ceramic raw material dry method granulation production line and a production technology. The production line orderly comprises a raw material field, a raw material bin, a grinding mechanism, a granulation mechanism, a drying mechanism and a screening mechanism. A mixer is arranged between a discharge outlet of the raw material bin and a feeding inlet of the grinding mechanism. A discharge outlet of the grinding mechanism is connected to a dust collector through a powder iron separator. An output end of the dust collector is connected to a powder homogenization mechanism. The powder iron separator is an iron separator with at least two rotary iron separation channels. A feeding end of a reciprocating type fluidized bed dryer is provided with a distributing device. The lower end of the distributing device is provided with an airlock. A ventilation partition plate is arranged in a blast chamber. The blast chamber is divided into a drying zone and a cooling zone through the ventilation partition plate. The screening mechanism is a rotary screen with a demountable screen. The production technology has a high one-step granulation qualified rate, a low production cost and good drying effects.

Description

technical field [0001] The invention relates to the technical field of dry granulation of ceramic raw materials, in particular to a dry granulation production line of ceramic raw materials and a production process. Background technique [0002] The powder preparation in the ceramic industry generally uses spray drying tower technology. The granules produced by the spray drying tower have a high granulation pass rate. Environmental protection is not up to standard and other issues, so there are great limitations in the granulation process. It is very necessary to provide a dry granulation equipment that is environmentally friendly, energy-saving, low-cost and meets the technical requirements of various ceramic wall and floor tiles. [0003] The current dry granulation method has a low ball forming rate, and most of them are false granules with loose density, which are easily damaged by external force, and the qualified rate of one-time granulation is low. There are two cases...

AI Technical Summary

Problems solved by technology

[0003] The current dry granulation method has a low ball forming rate, and most of them are false granules with loose density, which are easily damaged by external force, and the qualified rate of one-time granulation is low. There are two cases of unqualified products, one is high fine powder rate , the other is that the particles are too large, the fine powder needs to be re-granulated, and the particles are too large to be optimized and crushed into qualified particles. Both re-granulation and crushing will consume extra energy

[0004] When false particles and loose density particles enter the fluidized bed for drying, under the vibration of the fluidized bed, the false particles and loose density particles will be broken into fine powder, resulting in a high fine powder rate. During the screening process of the drum sieve , the rotation of the screening cylinder also destroys the particles. After the particles are destroyed here, they will be mixed with qualified products and screened out of the drum screen, which will affect the production of later products.

[0005] At present, it is generally believed that the drying and screening method of forming a circuit through granulation-screening-fluidized drying, that is, the particles first enter the drum screen for screening and then dry, so as to improve production efficiency and reduce costs, but this method has certain defects, namely The moisture content of the material after granulation is relatively high. In the actual operation process, the screen will be seriously smeared, and the passing rate of the screen will gradually decrease. It is necessary to use a screen cleaning mechanism to clean the screen. Frequent cleaning operations will greatly reduce the life of the screen.

Therefore, after the granulation operation is completed, it is very necessary to perform fluidized drying first, and then sieve. However, the particles after the granulation operation generally have a tendency to agglomerate before drying, and the agglomerated particles will cause particles to enter the fluidized bed. The phenomenon of uneven distribution on the fluidized bed seriously affects the drying efficiency and drying effect of fluidized drying

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