Transport head dustproof fire extinguishing spray Device composition The device is controlled by ZP 1 2 7-Z mine automatic sprinkler dust collector, GQQ0.1 smoke sensor, GWD100 temperature sensor, GCJ0.2 touch sensor, DFH20/7 mine intrinsically safe electric ball valve, 2 Water curtain, dust curta ...more...
Those who are familiar with nuts know that there are many types of nuts, such as square nuts, round nuts, ring nuts, wing nuts, hexagon nuts, and so on. Then the common hex nut is on the market. Why is the hex nut often used? See what Chen is saying. Hexagonal nuts are the crystallization of conti ...more...
General rules for the operation of various types of coal min…
Article 1 is a mine coal mining systems engineering main process, which includes off the coal, coal loading, coal, support, transference, and top and back Zhu seven step roadway maintenance. Therefore, this type of work must be carried out for each type of work that is performed in the coal mining f ...more...
Construction measures for adding, shrinking and changing gro…
Before construction, it is necessary to clarify the person in charge of construction, the person in charge of safety, the person in charge of technology, and the person in charge of power transmission. First, preparations: 1. Before the construction, the work should be emptied open, and the floati ...more...
1. Characteristics and processing status of mica Mica characteristics Mica: strong adhesion, elasticity, suitable gloss and high whiteness Sericite: Some functions are better, such as natural fine particle size, fine texture, silky luster, large diameter-to-thickness ratio, and high safety. Can m ...more...
Safety measures for the first time pressure on coal mining f…
I. Overview Mine coal furnace room groove 1501 of the coal mining face layer K5 seam, seam thickness between 1.37-1.73, an average thickness of about 1.5 meters, located at an upper seam K5 Xuanwei second segment, the first card from the group The bottom boundary is about 25m, the roof of the coal ...more...
Helping protect the environment and spare no effort to provi…
On April 26, 2018, it was learned that 23 Valin Xingma compression docking garbage trucks were successfully delivered to the Hengyang City Sanitation Department and served in Yancheng City's environmental sanitation, effectively protecting Yancheng's beauty and cleanliness. Valin Xin ...more...