Dry-method powder preparation device and method adopting roll press for powder grinding

Abstract

The invention discloses a dry-method powder preparation device adopting a roll press for powder grinding. The dry-method powder preparation device adopting the roll press for powder grinding comprisesa loading unit, a powder grinding impurity removal unit, a dry powder homogenizing and storage unit, a granulation and drying unit, and a press feeding unit which are sequentially arranged along a production line, wherein the powder grinding impurity removal unit comprises a static powder selector connected with the loading unit; a coarse material outlet of the static powder selector is connectedwith the roll press; the roll press is connected with a charge port of the static powder selector; a fine material outlet of the static powder selector is connected with a charge port of a dynamic powder selector; and a discharge port of the dynamic powder selector communicates with the dry powder homogenizing and storage unit via a first bag-type dust collector, a plansifter (or double plansifters), a strong-magnetic bar-type iron remover and a spiral conveyer sequentially. According to the dry-method powder preparation device adopting the roll press for powder grinding and adopting the abovementioned structure, materials are grinded through the roll press with a cast nail roll surface and designed for grinding strong materials, and the grinding efficiency is increased due to a higher grinding pressure; and the service life of the equipment is also longer due to the high wear resistance of the cast nail roll surface.

Description

technical field [0001] The invention relates to a dry-process powder-making technology, in particular to a dry-process powder-making device and method using a roller press for grinding powder. Background technique [0002] Ceramic bricks are thin plate products made of clay and other inorganic non-metallic materials used to cover walls or floors. Ceramic bricks are generally formed by dry pressing or extrusion. Extrusion generally adopts wet powder making process, while dry The milling process of pressed powder is divided into dry milling process and wet milling process. [0003] Among them, the raw material milling equipment of the wet milling process adopts the intermittent or continuous wet ball milling method. After grinding, the water content of the slurry reaches about 35%, and the ground slurry is dried and granulated by a spray drying tower. After granulation, the water content of the pellets is 5% to 7%, and then the pellets enter the aging warehouse for 24 to 36 h...

AI Technical Summary

Problems solved by technology

[0012] (1) Insufficient response to the abrasiveness of dry milling raw materials, improper selection of grinding equipment;

[0013] (2) The methods and facilities for the homogenization of raw materials for dry powder milling are not suitable, and the homogenization effect has not been achieved;

[0014] (3) Dry powder sieving and impurity removal after grinding occupies a large area, which is difficult to be used in the production of high-grade low-absorption floor tiles;

[0015] (4) It is not clear from the principle whether the dry milling pellets should be stale;

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