Due to the shortage of natural sand resources used in traditional buildings, and in order to effectively protect the ecological environment, the state has issued policies to prohibit the exploitation of river sand, and the artificial sand industry should be developed. In machine-made sand production, vertical shaft impact crusher, also known as sand making machine, is widely used as sand making equipment. Many people know that the sand machine has "stone to stone" and "stone to iron" crushing methods, but what are the differences between these two crushing methods is not very clear. Today, from the working principle, application and other aspects to introduce the sand machine "stone stone" and "stone iron" two crushing methods.

Normally, "Stone beating stone" is mainly used for shaping, while "stone striking iron" is used for sand making 。

"Stone to stone" crushing method is suitable for medium hard and above abrasive materials Such as basalt. In the crushing process, the material ejected from the wheel has impact on the material lining, and does not directly contact with the metal components of the equipment, so as to reduce iron consumption and maintenance time. Under the working condition of "stone striking stone", the grain shape of finished product is good 。

"Stone to iron" crushing method is suitable for medium hard materials with low abrasiveness Such as limestone. Under the working condition of "stone to iron", the crushing efficiency is higher.

It is necessary to fully understand the working principle of two crushing modes of sand making machine, i.e. "stone striking stone" and "stone striking iron", and introduce them in combination with their feeding methods. There are two feeding modes for sand making machines: "complete central feeding" and "central feeding with waterfall feeding". Normally, The whole center feeding is mainly "stone beating iron", which is generally used to make sand, and the output is relatively low; while the central feeding with waterfall feeding is the combination of "stone beating iron" and "stone striking stone", which is generally used for shaping, and the output is relatively high.

The material enters the central rotor of the crusher through the feeding hopper, The high-speed rotating rotor ejects the material, and the ejected material hits the striking guard plate and rebounds. When it falls, it collides with the material ejected from the central rotor In the crushing chamber, the crushed materials leave the crushing chamber under the action of gravity and enter the unloading hopper of the lower casing for unloading.

Full center feed "stone to stone" (left) / stone to iron "(right)

The material enters the central rotor of the crusher through the feeding hopper, The high-speed rotor casts out the material, and the ejected material is broken by hitting the peripheral guard board Under the action of gravity, the crushed materials leave the crushing chamber and enter the unloading hopper of the lower casing for unloading.

The material enters the crusher through the feeding hopper, Through the bulk cone (or bulk tray), it falls on the distributor and is divided into two parts. Some of them enter the high-speed rotating wheel from the middle of the distributor, which is accelerated rapidly and then ejected from the runner at high speed. These materials first impact and crush with another part of the materials falling around the distributor, and then impact on the material lining of the crushing chamber together. After being rebounded, they impact up obliquely to the top of the crushing chamber, change the direction and move downward, forming a continuous material curtain with the materials emitted from the runner of the wheel. In this way, a piece of material is broken in the crushing chamber by repeated impact, friction and grinding.

Center feeding with waterfall feeding "stone beating stone" (left) / Stone striking iron (right)

The basic working principle is the same as that of "stone striking stone" with central feeding and waterfall feeding. The difference is that when "stone striking stone" is used, the crushing chamber is installed with striking guard board, and the material forms a lining layer around it, and the material impacts on the material lining layer to crush. In the "stone striking iron" mode, the lower striking guard plate is replaced by the peripheral guard plate, and the material directly impacts on the peripheral protection plate and is broken.

Under the "stone to stone" crushing mode The material forms a material layer around the protection plate, and the material impacts on the material layer and is broken The main wear-resistant part is the striking guard 。 and Under the "stone to iron" crushing mode The lower impact plate is replaced by the peripheral protection plate, and the material directly impacts on the protective plate and is broken The main wear-resistant part is the perimeter guard 。

The above is the sand machine "stone stone" and "stone iron" two main differences. In the future, Xiaobian will sort out more sand making machine related content. If you have any questions or want to consult, please leave a message.