The problem of pollution is more serious in outer space, but it is also quite bad on Earth. Colorless and tasteless toxins and chemicals in indoor air are susceptible to illness. American allergy experts estimate that 50% of the disease is caused by indoor air pollution. What causes indoor air po
The mines are harvested in stages or in sections, with horizontal or vertical stratification, and the ore that has fallen out is transported out of the mine roadway in the bottom column by its own weight. After the mining house is finished, the intermediate column, the top column and the bottom colu
BA-F-100 bulk charger for the loading of granular ammonium oil and powdered ammonium explosives, the return rate of powdered ammonium explosives is 15% to 20%; Swedish EC-33 bulk loader The PF-60 bicycle is equipped with a device suitable for filling the blasthole in the underground sublevel caving
Sinopec Guangdong Petroleum Branch announced on the 5th that the first batch of Sinopec oil storage in the 14 cities of the Pearl River Delta, which has implemented the national five diesel replacement, has completed the oil replacement, and will complete the diesel upgrade of the remaining seven c
Iron analysis phase (phase analysis) i.e. the respective state of the components present in the material, shape, valence determination analytical methods. Methods using physical principles include specific gravity method, magnetic separation method, and X-ray structural analysis method. Alternative
The mine is located in Liaoning Province and was completed and put into operation in 1954. The actual output has reached 1600~2800t/d since production. It has been mined to 15 stages (to -46m) and has a depth of 816m. The mine has formed a joint development of the Pingshuo shaft. +253m below the fl