Vertical roller mill is a kind of machine used in slag production line which can be regards as an energy saving machine. The maximum load of the vertical mill system mainly comes from the main motor and the circulating air blower, which approximately takes up 70% power consumption. So, the key of system power saving is reducing consumption of main motor and circulating fan.

1.Selection of optimum parameters for the system energy consumption of vertical mill

There is no obvious differences of slag vertical mill in working principles, but different process condition, material, operating parameters and methods. So, the operators must observe and analysis the system trending and changing chart on various important parameters such as differential pressure, material-layer thickness, milling pressure, temperature, vibration value, wind consumption, etc.

2.Reasonable usage and control of system air quantity

The power of circulating fan takes up about 35% of total system power consumption, reducing the air can effectively reduce the fan power consumption. If wrong operation and the system can be controlled by the high speed, the production quality only can be held by increase separator speed. However, in spite of stable running it keeps, the currency of circulating air blower and separator is too high, so as to increase power consumption.

In additional, if wind leaking in the system, which affecting the normal wind supply, it will turn up circulating fan valves. Eventually it will increase the fan loadings and power consumption, affecting mill capacity somehow.

3.The adjusting of gear rings

According to the operating conditions, the status of mill plates, rollers and liners must be regularly inspected. Adjusting on time the height of gear ring in case of milling reduction, caused by the thickness of material layers, which can be further results motor loading and currency increasing.In the meantime, do not ignore the abrasion condition of scraper and the distance to the mill floor, which still can influents system consumption.

4.Increasing capacity and equipment operating rate

Powder mill yields the best performance in the maximum stable capacity. Increasing output is not the simply pursuit of high capacity, but maximize the performance of device in the possible range.

As the operators working in frontline on slag production line, it is not only needed to know the new technology and trends, but also master power saving methods and managements, as a result of clear thoughts and direction in managements, and success in energy saving field.