Ball Mill Grinding System

Ball Mill Grinding System

Ball mill grinding system has fine variations in the rough

Ball mill grinding system has fine variations in the coarse end. The ball mill has an important position in the production of materials. It has an important position in the grinding of mineral materials. The different properties of metal ore and non-metallic minerals have a series of special requirements for production. However, in terms of the fine control requirements of the control system for milling, we can understand the difficulty in controlling the production of milling, and what are the main aspects? How to solve it?

1. The measurement of the amount of coal stored in the ball mill is measured by differential pressure or vibration signal method, but both methods have large errors. Therefore, the control scheme based on the amount of coal stored has certain limitations. 2. Ball mill mechanism The powder system is a complex gas-solid two-phase flow system. The wind pressure, wind temperature, air flow and coal flow have a close coupling relationship. This system can be approximated as a three-input and three-output multi-variable strong Coupling system, the conventional single-loop PID regulator forcibly splits the relationship between variables, can not get better control effect or even lead to system instability. 3. The controlled amount of steel ball mill is affected by the coal volume, hot damper and cold damper opening, and is also affected by such factors as steel ball loading, coal moisture content, coal ash content, cold air and hot air temperature. . 4. The system has time-varying characteristics of the model. For example, the coal used in the power plant is variable, the coal quality is different, the particle size of the raw coal, moisture, temperature, grindability system and volatility often change, and the steel ball constantly keeps running. Wear, these factors make the coal mill exhibit the characteristics of a time-varying system.

Disadvantages of the rod ball mill: prone to chaotic accidents. It is difficult to deal with chaotic accidents, high labor intensity and long stopping time; due to the large inertia of the rod, the vibration of the ball mill is large, which affects the life of the reducer. The rod ball mill adopts advanced controllable feeding and discharging technology. The actual grinding material should be matched with the appropriate grinding body to change the traditional surface contact to line contact, so that the discharge granularity is more uniform and the output is higher. Refractory. In the chemical, metallurgical, glass and other industries, the grinding operations with relatively high requirements for the finished products after grinding are also used in the sand making industry for construction sands in recent years.

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