Mineral processing automation - automatic control of pH value of flotation pulp

The pH value is the most important parameter of the flotation operation, and whether the pH value is reasonable or not directly affects the production index. It is indeed difficult to directly measure the pH of the slurry. The adhesion of the slurry to the electrode and the adhesion of the bubbles to the surface of the electrode have a great influence on the measurement accuracy. Measuring the pH of the slurry generally requires an auxiliary measuring device to ensure that the pH electrode is measured under better conditions.

Considering the cost factor, the alkaline pH is generally adjusted by lime, and the pH of the slurry is controlled by controlling the amount of lime. Lime control is a difficult point, mainly in terms of clogging and scaling.

The acidic pH value is generally adjusted by sulfuric acid, and the pH of the slurry can be controlled by controlling the amount of sulfuric acid through a solenoid valve. Due to the strong corrosive nature of sulfuric acid, the choice of valve material is a difficult point. In addition, for some pulps containing fluoride ions, glass electrodes cannot be used.

Control system features:

●High degree of automation, stable control of pH value;

● For the process of adding lime, the blocking of lime can be avoided; for the operation of adding sulfuric acid, the harm of acid mist to personnel and the danger of long-term exposure to concentrated sulfuric acid can be avoided;

●Reliable electrical instrumentation and powerful measures to make the control device perform well;

● User-friendly configuration screen makes operation easier and more convenient.

Economic benefits:

● Stabilize or improve the mineral processing production index;

● greatly reduce the labor intensity of workers;

● Easy to operate and easy to manage.

Strength quality promotion group

Ningbo Zongchi Machinery Technology Co., LTD , https://www.zcdiecastservice.com