Knowledge

Chapter 1 General Provisions The first article is to fully mobilize the enthusiasm of all departments (units) and all employees, enhance employees’ sense of responsibility, establi

Silicon micropowder is an amorphous fine particle that is taken out of the furnace by the flue gas during the smelting of ferrosilicon and metallic silicon. Its main component is S

The Grasberg copper-gold mine is located in Papua Province, Indonesia. The mine is owned by Freeport McMoRan and the Indonesian local government accounts for approximately 18.72%.

The Lihir gold mine is located in an extinct volcano in Papua New Guinea. The mine was put into operation in 1997, and the current total output exceeds 10 million ounces. It is est

Pueblo Viejo gold mine is 100 kilometers away from Santo Domingo, the capital of the Dominican Republic, and is one of the largest gold mines in the world. The Pueblo Viejo gold mi

The Olimpiada gold mine is located in the most productive gold mining area in Russia. The mine was first discovered in 1970 and open-pit mining began in 1996. Olimpiada gold mine i

The Muruntau gold mine is located in Uzbekistan and has an amazing resource base (estimated to exceed 150 million ounces). The mine is 3.3 kilometers long, 2.5 kilometers wide, and

As one of the representative materials of third-generation semiconductors, silicon carbide is suitable for the production of high-temperature, high-frequency, anti-radiation, high-

1. Basic concept: mining area depot: a group of roadways and chambers at the junction of the upper (down) mountain of the mining area and the section roadway or the stage main road

1. Mining sequence of gently sloping and inclined coal seams: Downward mining sequence: first mining the coal group or coal seam, and then mining the coal group or coal seam. The l

Principles for choosing coal mining methods 1． Production safety 2. Economically reasonable 3. High coal recovery rate The main factors affecting the selection of coal mining metho

1. Features of mining method for steep coal seams (1) The coal lump mined at the coal mining face can automatically slide down, which simplifies the loading and transportation of t