What are the energy-saving technologies of a ball mill?

The ball mill is simple and compact, high reliability, is an important grinding equipment in the fields of metallurgy, chemical, cement, ceramics, construction, electricity.

However, the disadvantage of the ball mill is also obvious, that is, high energy consumption and high rail damage. In recent years, with energy growth and energy quality, energy saving is reduced to become a hot spot of ball mill research. At present, the measures for ball mill energy-saving and consumption are mainly concentrated in structural improvements, process parameters optimization, automatic control.

1, ball mill structure improvement

The advantage of large mills relative to the small and medium grinding is to save construction costs and operation and maintenance costs, simplify the configuration and automation requirements of the equipment. However, the unit energy consumption of large mills is high, so its specifications are limited. 

The current research is to improve the original equipment, develop energy-saving ball mills, such as ceramic industrial continuous ball mills, ceramic raw materials, continuous cone ball mill, static ball mill, rolling bearing ball mill, center drive energy-saving ball mill, Planetary ball mills, swing ball mills, etc., these new machine devices have achieved significant results in energy conservation and consumption reduction.

2, ball mill liner improvement

The liner in the ball mill can protect the cylinder, extend the service life of the equipment, and its shape can directly control the movement trajectory of the steel ball in the cylinder. At the same time, the liner is a spare parts that are easily worn, more demand and consumption in the ball mill, accounting for more than 60% of the lifting parts.

Changing the material and its form of the liner have an important impact on improving the work rate of the ball grinding machine. A metal lining plate, a rubber lining, a magnetic liner, a composite line, or the like are generally employed, and the transformation of the liner is a tapered hierarchy liner, an angular spiral substrate or the like.

3, the material and shape of the ball mill medium

The effect of the mill is generated in the cylinder to generate rushing, squeezing, grinding, and research, so that the material reaches the fineness and level requirements of the product. The ergonomic energy difference can result in poor wear resistance, high single consumption, more dosage, and severely affecting the efficiency of milling, accounting for about 30% of the lifting parts.

The grinding machine medium is mainly improved by improving the material, shape, and the like. In terms of materials, low chrome white cast iron grinding balls, with natural special alloy cast iron or waste slag alloy iron, alloy cast iron balls for major raw materials, because of its low price, moderate, and fast development. In terms of shape, short-column, rod balls, and cylindrical bar dielectric compared to the traditional steel ball grinding, the unit power consumption is low.

4, ball mill process parameter optimization  The working state of the ball mill is affected by the rotational rate, filling ratio, spherical ratio, long diameter ratio, liner and abrasive dielectric size, etc., each factor is intertwined, compared complex. It is necessary to give full play to the grinding efficiency of the ball mill, pay attention to the effects of the mill design operation parameters. Impropers of mine parameters will cause the ball mill efficiency to decrease, and even work properly.

In the working parameters of the ball mill, the rotation rate and the filling rate have significant effect on the working state of the ball mill. The milling process is the process of gradually decreasing the material from large particles, and the impact of the rotational rate and the fill rate on the product particle size in different grinding stages. In-depth study of the impact of the rotational rate and filling rate on the particle size of the product, can provide reference for the ball mill to provide reference, which greatly improves the efficiency of the ball grinding.

Research on the optimization of ball mill parameters mainly adopts numerical simulation simulation and experimentation. The ball mill powder is complex, it is difficult to describe the model, and the discrete element method is a study for the study of ball mill powder mill. The discrete dollar method is a numerical method suitable for studying discontinuous physical activity.

5, ball mill automatic control

The ball mill is a multi-input, multi-output, non-linear, time-change, high retardation and multivariate complex system. The influence of many factors makes mathematical models change with environmental conditions and is difficult to establish accurately. Effective automatic control of the ball mill can be operated to operate in a preferred work point position, reducing the energy consumption of the powder consumption, as the automatic control of the ball mill is increasingly valued at home and abroad.