Development of copper ore industrial grade:

1. In fact, from a technical and economic perspective, the industrial grade of copper is a dynamic index. This is especially true for a deposit. The general rule of mining mineral deposits is first rich and then poor, that is, first rich and then poor. With the improvement of mining and smelting technology, the ability of human to utilize mineral resources is more and more, so the requirement of ore grade is also reduced. As far as copper grade is concerned, the average ore grade of proven copper reserves in western and developing countries has decreased from 1.85 percent in 1950 to 1.09 percent in 1970 and from 0.9 percent in 1975. From 1900 to 1975, the average grade of copper ore mined in the United States fell from 4% to 0.55%. For nearly half a century, the average annual decrease is 0.02% ~ 0.03%. The grade of copper mining in China is generally above 3% in 1950s, has been reduced to 1% in 1960s and 70s, and the grade of ore from many copper deposits has been reduced to about 0.5% since 1980s.

At present, the mining grade of many domestic and foreign copper deposits is between 0.5% and 0.4%, and the boundary grade of some large open mining mountains is reduced to 0.2%. It is estimated that the world copper mining grade may be reduced to 0.. At 25%, when the boundary grade drops to 0.1%, some of the copper - rich rock may become industrial ore, which greatly increases copper reserves.