Vertical shaft impact crusher is also known as sand making machine. It iswidely used in metals and non-metallic ores, cement, refractory, abrasives,glass raw materials, construction aggregate, artificial sand and a variety ofmetallurgical slag fine and coarse grinding. It has more advantages than othertypes of crusher, especially in hard and abrasive materials, such as siliconcarbide, carborundum, sintered bauxite, magnesite, etc. it can handle a varietyof metallurgical slag.
2.Operating principleof sand making machine:
Thematerials enter the crusher through feeder hopper, which is divided into twoparts, one part through the middle of classifier entering into the rotatingimpeller at high speed, then accelerated, whose speed can reach hundreds ofacceleration, then is shot through the tunnels around the impeller by the speedof 60-75 meter/second.
First the materials will impact with some materials fallen around classifier,then impact on the whirlpool cavity's skateboard together, then will berebounded and impact on the top of the whirlpool cavity, then changes itsdirection and goes down, forms continual material layers with the materials shotfrom the impeller.
Therefore some materials will be impacted, crusher, milled twice or moretimes in the whirlpool cavity, then crushed materials will be excluded throughthe bottom discharging hole. This can from a closed circulation through thecircular classifier system; in general, materials can be crushed into 20 meshesthrough thrice circulation. Airflow self-circulation in the whirlpool cavity caneliminate the dust pollution well.
3.Features of sandmaking machine:
1. Simple structure and lowoperating cost
2. High efficiency and low consumption
3. It can fine crushcrude grind material and it is easy to maintain.
4. It is slightly influencedby the humidity of material and the max humidity is 8%.
5. It is moresuitable for crushing mid-hardness materials.
6. Its products are cubic, thedensity of piling up is high and the iron pollution is low.
7. The workingnoise is less than 75 decibels and dust pollution is light.
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