What harm does fluorite do to human body?

The main component of fluorite is calcium fluoride. Fluorite directly mined from mines is radioactive and generally does not cause harm to human body, but it is not suitable for daily activities such as bedrooms and study rooms.

Fluorite comes from the remnants of volcanic magma. During the cooling process of magma, the gas-water solution separated from magma contains many substances, mainly fluorine. In the process of the solution rising along the fracture, the temperature and pressure decrease, and fluoride ions in the gas-water solution combine with calcium ions in the surrounding rock to form calcium fluoride, and fluorite is obtained after cooling and crystallization. ?

Mining method of fluorite ore:

1, sublevel mining method. In the designed mining area, the middle transport roadway is excavated upward for 5 ~ 6m, and then the upper transport roadway is excavated upward every 5 ~ 7m along the vein, and the upper transport roadway is excavated upward for 25 ~ 30m. Finally, the upper transport roadway expands into a funnel. When mining, from one end or both ends, retreat or brush the top and fall into the mine.

This mining method has the advantages of heavy workload, large amount of crushed stone and ore, high labor intensity and low efficiency, and it is not safe for workers to enter the goaf to pick up ore, so it is rarely used.

2. Single slope and double slope filling mining method. Mining engineering and mining methods are basically the same as sublevel mining, and mined-out areas are filled with broken walls on one or both sides. This method can control the roof after blasting and reduce the ground pressure of ore blocks, and the recovery rate can reach above 90%. ?

Refer to the above? Baidu encyclopedia-fluorite