Airflow buffer

Abstract

The invention provides an airflow buffer which is used in cooperation with a simple powder airflow grader in a quartz sand dry method processing airflow grading process and used for grading products which are 120 or more meshes in size. The airflow buffer is a cylindrical shell. The upper end of the airflow buffer is connected with a conical end socket, an upper discharge port is formed in the top end of the airflow buffer, the lower end of the airflow buffer is connected with a conical collecting hopper, and a lower discharge port is formed in the bottom of a cone. A conical ring is arranged on the portion, at the joint of the top end of a cylinder and the cone, inside the cylinder, an annular cone hopper is arranged on the upper middle portion, the lower portion of the conical ring is connected with a columnar annular space grading ring, and the conical ring divides the interior of the cylinder into an upper chamber and a lower chamber. Mixtures which are 120 or more meshes in size enter an upper throwing impeller along with airflow and are evenly thrown towards the periphery, most fine particles which are more than 120 meshes in size are discharged from the upper discharge port along with the ascending airflow under the effect of the airflow, particles which are 120 meshes in size or a small number of particles which are more than 120 meshes in size are thrown, drop after making contact with the wall of the buffer and are gathered to a grading lantern ring, and are graded again by secondary air, and the particles which are 120 meshes in size are discharged through the lower discharge port.

Description

technical field [0001] The invention relates to a device for classifying fine particles of quartz sand, which is matched with a simple airflow classifier for powder in the dry production of quartz sand, specifically an airflow buffer. Background technique [0002] In the large-scale continuous production of dry processing of quartz sand, it is necessary to separate the products above 120 mesh from the crushed mixed material from the system, and to classify the products of 120 mesh and above again. Due to the small particle size of products above 120 mesh, airflow classification is usually used in the production process. The principle of airflow classification is to separate products with different particle sizes through the pumping action of a certain intensity of airflow. At present, the airflow classification equipment commonly used in the dry processing of quartz sand is a simple airflow classifier for powder materials. To undertake the grading treatment of the mixed mat...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical conflict in the airflow classification process of dry processing of quartz sand, which must be able to handle a large amount of mixed materials and achieve high classification accuracy (especially fine particle classification accuracy), the invention provides a simple airflow classification method for powder materials. The machine is equipped with an airflow buffer

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