To reduce CO2 emissions, Keestrack has striven to optimise machine efficiency through combining higher output with less wear and electric driven equipment. The company says that with the I4e it is possible to undertake secondary and tertiary crushing at a much lower energy consumption due to the drive system and design. The I4e crusher has a flexible electric drive system which can be connected directly to the mains, or it can be powered by a drop off diesel/genset unit. When connected to the grid, CO2 emissions depend on the power source. Due to the electric drives of the crusher (160kW), the feed and conveyor belts and the system hydraulics, the crusher has been designed to deliver a very cost efficient and emission free operation. 

Keestrack states that thanks to its RIC technology, the I4e can be used flexibly in the secondary and tertiary crushing of rock, natural stone, oversized gravel and the recycling of construction and demolition waste, including asphalt and concrete, thanks to the built in metal detector. This means that the I4e has been designed to do the work of two machines in one. The rotor speed of the crusher can be adjusted to influence the degree of the fine fraction, with the system being designed to provide less wear, a better end-product quality (granular shape) and deliver significant energy savings in typical applications such as sand production.

Material enters the feed hopper with the heavy duty apron feeder evenly feeding the machine without loss of fine material. The reversible loading conveyor, which has an integrated metal detector, feeds the crushing chamber. When metal is detected, the conveyor belt reverses and a drum magnet separates the metal. The loading belt feeds the crusher from above, the material falls into the rotor and is broken by the specific shape of the crusher housing. Because the impact crusher runs in both directions, the blow bars are said to last longer and wear to an optimal shape. The blow bars wear in a such a way that when it turns in the opposite direction the blow bar has an optimal shape again.

The closed circuit has been designed to ensure production of a 100% end-product of a very high quality and is said to meet all European standards. The crushing house of the I4e is easily accessible as the side wall of the crushing chamber can be opened. The blow bars can be replaced safely as a lifting device is provided for this purpose. The I4e is also equipped with walkways and maintenance platforms.