Sand-making equipment is mainly used to produce sand for construction and highways, that is, to break large stones such as river pebbles, limestone and coal gangue into small sand and gravel of 0-4.75 mm. With the continuous development of technology, as well as the sand and gravel industry’s more and more stringent requirements for equipment, there are various machines in the market, among which roller machines and fine crushers are commonly used. Which sand-making effect is good? Here you introduce the difference between the two.
Roller machines and fine crushers both have the function of fine crushing and rough coarse grinding, which can not only crush stones but also produce sand. However, there are differences from appearance to the internal structure design, as well as the processing materials, feed granularity, discharge granularity and output size, which are introduced as follows.
Roller machine is mainly composed of rollers, roller supporting bearings, pressing and adjusting devices and driving devices.
The crusher is mainly composed of rotor, bearing, hammer head, shell, crushing cavity, counter-attack liner, discharge grate plate and transmission mechanism.
The principle of extrusion crushing is adopted for the roller machine. The crushed materials fall between the two rollers through the feeding port for crushing, and the finished materials fall naturally. When there are hard or unbreakable materials, the rollers can automatically give in by the action of a hydraulic cylinder or spring, so that the gap between the rollers is increased, and the hard or unbreakable materials fall, thus protecting the machine from damage. The two rollers rotating in opposite directions have a certain gap, and changing the gap can control the larger discharge particles of products.
The fine crusher works continuously. Driven by the motor, the rotor rotates at a high speed, and the materials enter the crushing cavity to be crushed and impacted by the plate hammer on the rotor, then enter the second fine crushing cavity to be crushed, and then discharged from the discharge port.
The roller machine has a simple structure and less maintenance, and the handwheel or hydraulic structure can quickly adjust the discharge particle size. In addition, through the roller design and configuration of two motors, the output can be increased by 30%-40%, the total energy consumption can be reduced by 20%-30%, the high yield is stable and not blocked, and the operation under dry and wet materials can be overcome.
The process flow of the fine crusher is simplified, and the grate plate design is adopted, which makes the fine crushing efficiency greatly improved. The grate bar design is also used to control the discharge particle size. When dealing with materials with certain humidity and viscosity, the grate bar can also improve the operation situation. At the same time, it can realize high linear speed and fast operation in operation, save electricity and reduce consumption better than the traditional roller press.
Which is better, the roller machine or the fine crusher? Each has its advantages and disadvantages, so it is necessary to consider comprehensively, pay attention to whether the quality of finished products can meet the next stage requirements, and make rational choices. If you are not particularly good at it, you can also find manufacturers to help you choose.
The finished product of roller machine-made sand has the advantages of uniform particle size, low crushing rate, low needle-like content and no internal cracks. Especially in the coal industry, it can be directly treated as long as iron and impurities are removed without gangue removal, thus simplifying coal preparation technology and reducing production costs.
The finished product rate of fine crusher is high, and the granular products account for about 85%, which is cube and less powder.
However, we can rest assured that these two pieces of equipments meet the standards of sand for concrete in terms of particle size distribution, mud content, mud block content, stone powder content, firmness, crushing value, compressive strength, density requirements, water absorption of sand, harmful substance content and so on.
Post time: Nov-09-2023