Concrete batching plant mainly consists of mixing host, weighing system, conveying system, storage system, control system and other ancillary facilities. This article introduce concrete batching plant composition briefly.
Concrete batching plant composition — Mixing host
The mixing host machine divides into forced stirring and self-unloading stirring according to the stirring methods. The forced mixer is the mainstream that uses in domestic and international concrete plant. It can mix a variety of concretes such as fluidity, semi-dry and dry. The self-unloading mixer mainly stirs the fluid concrete and is rarely used in the concrete batch plant. In addition, the forced mixer consists of spindle planetary mixers, single horizontal shaft mixers and twin horizontal shaft mixers according to the structure. Among them, the twin-shaft forced mixer has the best comprehensive performance.
Concrete batching plant composition — Weighing system
The material weighing system is a key component of concrete batching plant. It affects concrete quality and concrete production cost. In addition, it mainly includes three parts: aggregate weighing, powder weighing and liquid weighing.
In general, the batching plant below 20 cubic meters per hour adopts the superposition weighing method. That is, the aggregate (sand, stone) is weighed with a scale, the cement and the fly ash are weighed with a scale, water and liquid admixtures are weighed separately. However, in the batching plant of more than 50 cubic meters per hour, each material usually weighs separately, and all weighing controls by electronic scale and microcomputer. The weighing accuracy of aggregate is ±2%, and the weighing accuracy of cement, powder, water and admixture is up to ±1%.
Concrete batching plant composition — Conveyor system
Materials conveyor system consists of three parts:
- Aggregate conveying
- There are two ways of transporting aggregates: hopper conveying and belt conveying. On the one hand, the hopper lifting has small footprint and simple structure. on the other hand, the belt conveyor has long conveying distance, high efficiency and low failure rate. Moreover, belt conveyor is mainly suitable for concrete batching plants with aggregate storage bins, which increases the productivity of the mixing plant.
- Powder conveying
- The powders available for concrete are mainly cement, fly ash and mineral powder. The commonly used powder conveying method is screw conveyor conveying.
- In addition, the advantages of spiral conveying are simple structure, low cost and reliable use.
- Liquid transport
- It mainly refers to water and liquid admixtures., transporting by pumps respectively.
Concrete batching plant composition — Storage system
The materials storage methods in concrete are basically the same. The aggregate usually stacks in the open air; the powder stores in a fully enclosed steel structure silo; the admixture stores in a steel structural container.
Concrete batching plant composition — Control System
The control system of the concrete batching plant is the central nerve of the complete set of equipment. The control system has different functions and preparations according to different requirements of the user and the size of the concrete plant. Generally, small batching plant has a simple control system. On the contrary, and the system of the large batching plant is relatively complicated.