Diatomite crushing and drying apparatus and crushing and drying method

Abstract

The invention discloses a diatomite crushing and drying apparatus and a crushing and drying method. The diatomite crushing and drying apparatus comprises an air duct, a crusher, a roller machine, a primary vibrating screen, a grading device and a dust collecting chamber. The crusher comprises two crushing rollers rotating along opposite directions and uniformly provided with a plurality of rows of wolf tooth structures on their surfaces. The roller machine comprises two rollers rotating along opposite directions and provided with a plurality of projecting structures on their surfaces. During crushing and drying, diatomite successively undergoes crushing and drying twice in the crusher and the roller machine, wherein drying temperature is 400 to 600 DEG C, and drying time is 30 to 60 s; after drying, crushed diatomite enters into the grading device and the primary vibrating screen for dust collecting and screening so as to screen out desired particles. The invention has the following beneficial effects: the whole apparatus integrates feeding, crushing, drying, grading, screening and dust collecting into one, is convenient to operate, has high production efficiency and enables cost for manpower and material resources to be substantially reduced. The crushed and dried diatomite has low moisture content, and output of the particles with particle sizes in a desired range is great.

Description

technical field [0001] The invention belongs to the field of diatomite drying, and in particular relates to a diatomite crushing and drying device and a crushing and drying method. Background technique [0002] Diatomite is a kind of siliceous rock, which is mainly distributed in China, the United States, Denmark, France, the Soviet Union, Romania and other countries. The reserves of diatomite in my country are 320 million tons, and the prospective reserves are more than 2 billion tons. Diatomite has the characteristics of large porosity, strong absorption, stable chemical properties, wear resistance, heat resistance, etc., so it has been widely used in many fields. However, the mined diatomite has a high water content, and the dried raw ore still contains about 30% water. It is still hygroscopic in direct contact with water and becomes mud, so it cannot be used directly; instead, it needs to be dried or baked. After dry treatment, it can be used in industry or food industr...

AI Technical Summary

Problems solved by technology

At present, there is no research on the control of the diatomite crushing process, the control of the moisture content after drying, and the control of the particle size of the diatomite after crushing.

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