The impact mill for crushing of construction sand, equipped with a hydraulically mechanism to open the crusher housing is very suitable for crushing and making construction sand. With the sand making impact crusher you achieve a high reduction ratio and an excellent particle shape.
The fields application of the sand making impact mill
The sand making impact mill is mainly used for primary and secondary crushing in the sectors of Sand making process, as well as environmental and recycling technology and the pit and quarry industry. To make sand by this series impact mill, the feed materials can be soft to middle-hard rock, e.g. limestone and salt, rock, gypsum, various types of ash and slag, hard coal, overburden and similar materials.
The operation mode of the sand making impact mill
After entering the crushing radius of the rotor, the feeding material is grasped by the beater ledges, flung against the impact rockers and crushed by repeated impact stress. This produces a largely crack-free final grain with a high cubic proportion of grain.
Final grain distribution can be influenced by the setting of the impact rockers towards the crushing radius of the rotor (gap widths) and by the speed of the rotor. The adjustment of the impact rockers is carried out by means of a worm drive mechanism. Compensation for wear of the beater ledges and the impact plates is granted due to the adjustment.
In order to prevent possible damages caused by any foreign matters entering the machine, the impact rockers are spring-mounted, i.e. they can avoid any temporary overloads.
The wearing parts of the sand making impact mill
– The impact mill rotor is designed as a closed rotor in an annealed low-tension welded structure. It is equipped with two, four or six surface-ground beater ledges.
– The beater ledges are made of wear-resistant and durable materials. They are pushed up to the rotor holders and then pressed with their entire length against a firm structure via wedge segments. They can be turned and can also be set up at a more elevated level.
– The impact plates are also made of wear-resistant and durable materials. They are screwed onto the impact rockers.
– The housing is shielded by wearing plates or by highly-alloyed hard-facing in the areas subjected to high stress.
