PP Strapping
PP strapping is used for automatic and semi-automatic machine and munual packing.PP strapping roll has more than 10 colors, red, green, yellow, blue, purple, black etc. plastic strap. Using new materials, imported materials, ordinary materials make plastic strapping, has strong pull force. The width of pp strap roll is 5 to 19mm, thickness is 0.45-1.3mm, , tensile force is 40 to 300kg. Could make customized pp packaging.
Pp Strapping,High Tensile Virgin Pp Strapping,Woven Pp Strap,High Quality Pp Strap Dongguan Yalan Packing Materials Co., Ltd. , https://www.yalanpack.com
What are the secondary crushing methods for open pit mines?
I. Rock drilling blasting method: The essence of this method is to perform a second blasting on large ore rocks. Generally, a blast hole is drilled on the rock to perform charge blasting. When the joints are relatively developed, the explosives can be directly attached to the large surface, and the explosives are blasted, that is, the outer blasting, and the explosive amount is 3 to 7 times that of the rock blasting, and the safety is poor.
Second, the crusher: the crusher is a device that uses mechanical energy to break large rocks. At its core is a mechanism similar to a shallow hole impactor called a lithotripter. Breaking large blocks with a crusher can reduce labor intensity. Improve working conditions and increase the efficiency of crushing large blocks.
Third, electrothermal crushing: The principle of electrothermal crushing is to use the conductivity of the ore to add the electrode to the two points of the large block to form an electrical path, generating heat, so that the large rock is broken under the local expansion force.