The difference between stone hitting stone and stone hitting iron sand making machines

“Stone hitting stone” and “stone hitting iron” are two different working principles and crushing methods in sand making machines (vertical shaft impact crushers), and they have significant differences in many aspects. The following is a detailed comparison of “stone hitting stone” and “stone hitting iron”:

1. Working principle
Stone hitting stone
The material enters the crusher through the central feed pipe, falls onto the distribution plate through the bulk cone, and is then divided into two parts by the distribution plate.
A part of the material enters the impeller from the distribution plate and is ejected from the impeller flow channel at high speed, and is impacted and crushed with the other part of the material on the distribution plate.
The impacted material then impacts the material lining of the crushing chamber, and then rebounds to the top of the crushing chamber to form a continuous material curtain.
The material is finally crushed after multiple impacts and frictions in the crushing chamber.
Stone hitting iron
The material enters the crusher through the central feed pipe, usually using a completely central feed method.
During the crushing process, the material directly collides and impacts with the impact block (or anvil), thereby achieving crushing.

2. Finished product particle shape and applicable materials
Stone hitting stone
The crushed particle shape is better, but the stone powder content is slightly higher.
It is mostly suitable for material shaping, such as the need to obtain finished sand with good particle shape.
It is suitable for materials with medium or higher hardness and highly corrosive materials, such as basalt.
Stone hitting iron
The crushing efficiency is high, but the particle shape is relatively not as good as “stone hitting stone”
It is mostly suitable for material sand making, such as occasions where a large amount of crushing is required.
It is suitable for materials with moderate or lower hardness and less corrosive materials, such as limestone.
3. Equipment wear and maintenance
Stone hitting stone
The material does not collide with the metal components during the crushing process, but directly impacts the material lining.
It can reduce the wear of the sand making machine equipment and extend the service life of the equipment.
The main wear-resistant parts are the impact guard plate.
Stone hitting iron
The material directly collides and impacts with the impact block during the crushing process.
It increases the wear of the equipment, especially the wear of the impact block (or anvil).
The main wear-resistant parts are the peripheral guard plate (or impact block).

4. Output and energy consumption
Output
The combination of “stone-on-stone” and “stone-on-iron” crushing methods (center feeding with waterfall feeding) usually has a higher output.
The “stone-on-iron” method with complete center feeding has a relatively low output.
Energy consumption
Energy consumption is related to factors such as equipment model, material properties, and degree of crushing. It is impossible to directly compare the energy consumption difference between “stone-on-stone” and “stone-on-iron”.
But in general, efficient crushing methods (such as “stone-on-iron”) may have lower unit energy consumption (comprehensive energy consumption after considering equipment wear and maintenance costs) at the same output.
In summary, “stone-on-stone” and “stone-on-iron” have significant differences in working principles, finished particle shape and applicable materials, equipment wear and maintenance, and output and energy consumption. Which crushing method to choose depends on the specific application scenario and needs. In actual applications, it is necessary to comprehensively consider factors such as material properties, production requirements, equipment investment and maintenance costs to select the most suitable crushing method.