Date:2018-11-23 17:26:33

Powder Structure And Working Principle Of Grinding Mill

Powder Structure And Working Principle Of Grinding Mill

Powder discharging structure of grinding mill and its working principle

Summary of contents: The powder-extracting structure of the grinding mill is mainly composed of a large cyclone separator, a collecting hopper, a screw conveyor and a gas locker. Because the function of the collecting hopper is to store the material, the finished product obtained by grinding does not have the granularity. It is larger than 0.02mm, so the designed hopper volume should not be too large. Too large will cause the material to be filled and difficult to discharge. Then according to the installation site and the support capacity of the steel frame, the hopper volume can be set to accommodate the It material. The volume is made of 6mm A3 steel plate.

The powder-extracting structure of the grinding mill is mainly composed of a large cyclone separator, a collecting hopper, a screw conveyor and a gas locker. The structures of the collecting hopper and the screw conveyor are:

1, collecting hopper

Because the function of the collecting hopper is to store the material, the particle size of the finished product after grinding is not more than 0.02mm, so the designed collecting bucket volume should not be too large, too large will cause the material to be filled and difficult to discharge and then according to the installation site and The support capacity of the steel frame is such that the volume of the collecting hopper is set to accommodate the volume of the It material, and is made of a steel plate having a thickness of 6 mm A3.

2, screw conveyor

The function of the screw conveyor is to not only lock gas isolation but also to change the continuous discharge into indirect discharge. Its structure is simple and the sealing performance is good, it is easy to discharge, the operation is safe and convenient, the manufacturing cost is low, and it can be based on actual conditions. Designed for production needs and actual packaging speed of workers.

When it is working, the powder ground by the grinding mill main machine moves with the air flow of the blower to the analyzer above the main machine, and then the powder with the fineness of the grade is in accordance with the flow of the wind from the tangential direction into the large cyclone separator, due to the air flow. High-speed rotation, which generates a large centrifugal force during rotation, and then turns most of the powder to the wall. The large particles that lose speed along the wall of the vessel fall into the collecting hopper and the gas that rotates separately rotates toward the center with the contraction of the cone. The taper at the bottom of the cyclone begins to rotate and rises to form a top-down spiral motion, which is discharged from the upper part of the large cyclone separator, and then sucked into the fan through the return air pipe, and then the gas is introduced into the grinding mill by the fan outlet port.

The main engine is returned to the air box, which forms a circulation system. The material is continuously crushed and ground and continuously taken away by the airflow, forming a system for conveying powder. The whole system is closed and the powder conveying system is under negative pressure. status. A screw conveyor is installed at the lower outlet of the collecting hopper, and a gas locker is installed at the outlet of the screw conveyor. Since the entire structural device is in a negative pressure state and the outside of the mill is in a positive pressure state, the positive and negative air flow must be locked. In the isolation, the air locker and the screw conveyor simultaneously play the role of air lock isolation. The first is that the air lock locks the positive and negative air flow, and the powder is collected by the collecting hopper into the non-operating screw conveyor. When the material is full, the screw is locked by the non-operating screw conveyor. When the air locker does not work, it is directly locked by the screw conveyor to be designed as a secondary air-locking isolation, and it is also an indirect centralized discharge packaging product, which avoids the fact that it is rarely caused by the tight air lock. Powder or no powder phenomenon improves the efficiency of powder extraction.

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