The hammer crusher is the cheapest fine crushing equipment, but it can only be applied to smaller mining sites (20-30 tons per hour). This is because under conditions of lower capacity, the cost pressure and maintenance difficulty caused by the wear and replacement of the hammer heads of the hammer crusher are relatively small and acceptable to the owner. However, as the most cost-effective fine crushing equipment, the belt conveyor itself has many shortcomings. First, the effect of fine crushing is insufficient, the striking surface of the hammer head is not concentrated, the striking surface is relatively small, and the effect of fine crushing is poor. Secondly, the hammer head is an integral type, after the hammer head is worn out, it must be replaced as a whole, the maintenance cost is high, the maintenance work is more complicated, and a set of hammer heads only have a service life of one or two days. Finally, the production capacity cannot be greatly improved, it can only be applied to small mines. If the mine owner needs to increase the production capacity, when the single-line production capacity exceeds 50-60 tons, continuing to use the hammer crusher is no longer suitable. Using the hammer crusher to complete the fine crushing operation with larger output is very勉强, which will lead to the situation where the wear cost remains high and the maintenance is frequent.
The efficient fine crusher (PX series) is suitable for large-scale iron ore crushing, because the design structure of the efficient fine crusher has been greatly improved. The hammer head is designed as a separable type (the hammer head is fixed on the hammer handle), the hammer head is designed into a horseshoe shape to increase the striking surface of the material, the symmetrical structure of the hammer head makes the hammer head can be used twice in reverse, ball mill. The bottom screen strip is designed into a casting screen plate, increasing the wear resistance and grinding breaking function, vacuum brick machine. The screen plate has the ability to adjust up and down, greatly extending the life of the screen plate. The impact plate adopts the same structure and material as the impact crusher, greatly improving the impact crushing ability and wear resistance. Therefore, the efficient fine crusher of our company has made great progress in the ability to finely crush iron ore. A single machine equipment can meet the crushing capacity of 130 tons per hour, and the particle size after crushing is less than 10 mm for 80%, and less than 6 mm for 50%. In the production of Hebei, a set of hammer heads of PX1212 efficient fine crusher can reach a service life of more than 10-15 days (16 hours/day), compound crusher, it can be said that it has made remarkable development in the fine crushing of iron ore.
When the single-machine fine crushing capacity reaches more than 150 tons, we should consider using a cone crusher to complete this task. Because the cone crusher is a typical layer pressing type crushing equipment, the biggest feature is that the service cycle of wear-resistant parts is relatively long, usually in the third stage crushing, the wear-resistant parts of the cone crusher (liner, crushing wall) can reach a service life of two or three months, which can save a considerable amount of production cost for users and greatly reduce the amount of maintenance work. However, the price of the cone crusher is relatively high, resulting in higher investment costs.
The application of cone crushers in metal mines (iron mines, copper mines, molybdenum mines) is a popular practice worldwide, especially in large mines where the application of cone crushers is very common. Cone crushers are divided into spring cone crushers, multi-cylinder cone crushers, and single-cylinder cone crushers. Related thematic articles: China: Overview of Import and Export of Construction Machinery Products, Jigging Machine, Mining Equipment, Dryer, Charcoal Machine Equipment, Magnetic Separator, Hammer Crusher, Guitar Tablature.