Modern sand crusher experience trails and errors This new type impact crusher is widely used all over the world in recent 20 years. It has been proved that this series of crushers can effectively increase productivity and final product quality. And they can also greatly reduces the investment costs and operation costs. Incomparable excellent performance is shown in the secondary crushing, tertiary crushing and material recovery. Impact crusher is widely used in stone crushing plant and sand making production line for construction building materials.
It can crush big stones or rocks such as quartz, basalt, shaly, kaolin, limestone, marble etc into small size for building aggregates or manufactured sand. With economic development, the state strong support infrastructure such as railways, highways, bridges, hydroelectric project construction, the construction of the project can not be separated from the sand and gravel aggregate, general infrastructure projects, if with less material can be directly from the sand quarry procurement. The vast majority of large-scale projects such as railways, highways, bridges, hydropower project, located in the mountains or deep valleys, construction sites, narrow, tight construction period, large amount of concrete works, the high strength of concrete construction, strict requirements on the quality of the sand aggregate mechanism. Excellent mechanism sand equipment with modern levels of technology and dynamic economic indicators and mechanisms of sand production line design to ensure that the project will require grading mechanism sand aggregate, in the regulation of the whole project during the construction period dynamic balance of production and supply is the fundamental purpose of the mechanism of Sharjah plant design. The trials also established that a cheaper and more effective drilling method had to be adopted.
It was decided to develop a horizontal method to drill through the centre of each concrete layer, which allowed the heavy rebar at the top and bottom of each layer to be avoided. In the end, Safedem decided to use Sandvik Commando rock drill machine that was adapted to allow it to horizontal drill holes to a depth of up to 4 m (13 ft). This created another challenge how to load the holes with explosives. As a result, the charges were pre-assembled in a heavy duty 38 mm (15 in) diameter, 1 m (3.3 ft) long polythene tube. Each charge consiste perunit and amoblast with a charge per hole weight of 1.2 kg (2.6 lb). However Safedem developed an in series 300 millisecond delay detonator connection between up to 10 20 hole sections, allowing up to 250 kg (550 lb) of weight to be detonated over a 3 second charge time period. A series of mill10 ball blast sections produces upwards of 1,500 m3 (53,000 ft3) of concrete debris.