Selecting A Secondary Crusher: What Is the Right Choice?
There are three types of secondary crushing equipment widely accepted in the market nowadays, that is, the impact crusher, the cone crusher and the sand maker. Not only do they differ in appearance, but they also have many differences in actual use. Choosing a crusher with maximum reliability and high performance is the first step for mining companies to success. Hence, to help you select an appropriate crushing machine, this article involves their differences in the aspects of the working principle, the materials’ hardness, discharging size, the finished product’s shape, the processing capacity, investment as well as pollution.
How They Work
The impact crusher adopts the principle of impact crushing. When it runs, the material is repeatedly impacted and crushed between the hammer and the impact plate. Whereas the cone one crushes the material by laminated crushing. Its rolling wall continuously moves toward the crushing wall, and the material sandwiched between the two is thereby smashed. Fote Machinery’s sand makers generally use the principle of “stone-to-stone” or “hitting stone with iron” to achieve the crushing effect. Among them, except for the vertical impact sand maker, which uses “stone-rock”, the HVI and VSI series sand making machines both adopt the “hitting stone with iron” crushing principle, and one portion of the material collides with another one under the action of centrifugal force to be crushed.
These three machines are also characterized by different degrees of hardness of the material. The cone crusher mainly crushes materials with medium and high hardness, such as granite, basalt, tuff and river pebble. The impact one is mainly suitable for crushing brittle but less tough materials with small and medium hardness, for example, limestone; whereas the sand maker is available for ore materials whose hardness is no higher than 320Pa, to name a few, quartz stone, iron ore, diabase, bluestone and construction waste.
In general, the cone crusher produces finer materials than the impact one. With the functions of fine crushing, coarse grinding and shaping, the sand maker features smaller discharging size. Therefore, in actual production, if you want to buy a secondary crusher for ore beneficiation, the cone crusher is a better choice; if you are engaged in building material or construction engineering industry, it is advised to choose the impact crusher. And the sand maker is more suitable for crushing and shaping building materials, artificial sand and metallurgical slag.
The Finished Product’s Shape
The impact crusher often manufactures products in good shape, with little angularity and more powder; but the cone’s finished product has more needle-shaped pieces and poorer shape. For the sand maker, its finished products are cubic in excellent shape and uniform size.
In terms of capacity, the cone crusher has high output and stable operation; thus, it is often used for large production lines with high capacity. Both impact crusher and sand maker have complete crushing functions, higher efficiency and higher comprehensive benefits.
More expensive as the cone crusher is, it has lower cost in the late time of operation. Its wear parts also have long service life, so choosing the cone crusher can avoid frequently replacing spare parts. With a simple structure, the sand maker has low running cost in actual production, and its wear parts are also durable. Therefore, the cone crusher and the sand maker are more cost-effective than the other in the long run.
The impact crusher mostly causes large noise pollution and dust pollution, while the two others produce less. More importantly, the sand maker is more environmentally friendly on account of low iron pollution and the working noise of less than 75 decibels.
In brief, these three machines have their own merits just as each coin has two sides; therefore, customers need to take their production needs into account before making a choice about the secondary crusher. Apparently, the impact crusher is more suitable for small production lines. If you are engaged in a large production line whose material is very hard, choose the cone crusher and you will achieve better crushing effect. If your project has strict requirements for the grain shape and for environment protection, choose the sand maker with the shaping function and you will make a big profit.
|the comparison of secndary crushers|
|Differences||Impact Crusher||Cone Crusher||Sand Maker|
|Working Principle||Impact crushing||laminated crushing||"stone-to-stone" or "hitting stone with iron"|
|applicable material||those with small and medium hardness||those with medium and high hardness||ore ones whose hardness is no higher than 320Pa|
|final products’ shape||better shape||more needle-shaped and poorer||cubic|
|processing capacity||high crushing efficiency||high output||high comprehensive effects|
|investment||lower price but higher maintenance costs||higher price but low maintenance costs||Low costs|
|pollution||dust pollution and large noise||Little pollution||a small amount of iron pollution and small noise|
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