All of the refining methods can damage the environment.
DEAR SIRS It is my pleasure to make this diploma which environmental ud very graciously gave me the opportunity to participate. Dear Sirs desire to tell them the truth, I do not master the English language perfectly. I wish I if possible be transferred to my native language is Spanish, wishing him success in his marvelous management, to provide the needy and eager to adquirr this knowledge for the good of humanity. A sincere hug. of you cordially JORGE CASTRO MARIO CARDONA ----- BOGOTA COLOMBA
we learn here how we extract minerals with their ores in different methods
Is the heap method used only for gold extraction?
how the different minerals extracted from same smelter?
Estos procesos generalmente involucran la utilizacion de otros metales para su obtencion u elementos que permitan su refinacion
el refinado de metales es la eliminación de impurezas de metales en bruto. Después de la extracción de materias primas, metales en bruto son entre 96 y 99 por ciento de pureza del principal metal, siendo el resto impurezas.
los minerales deben ser procesados para la extracción de metales puros, existen varios métodos de refinados pero estos son nocivos para el medio ambiente, aveces produciendo lluvia ácida que esta contiene altas concentraciones de Ph. deben pasar por varias veces de extracción para poder retirar las impurezas.
¿como podríamos mejorar los procesos de refinación para que no afecte al medio ambiente?
This method must be done in a environmentally friendly way to reduce the impact of climate change and global warming.
Once an ore has been mined, it must be processed to extract pure metal. Processes for extracting metal include:
All of the refining methods can damage the environment. Smelters produce large amounts of air pollution in the form of sulfur dioxide which leads to acid rain. Leaching methods can pollute streams with toxic chemicals that kill wildlife.
In preparation for the smelting process, the ore is crushed and concentrated by a flotation method. The concentrated ore is melted in a smelting furnace where impurities are either burned-off as gas or separated as molten slag. This step is usually repeated several times to increase the purity of the metal.
For the electrowinning method ore or mine tailings are first leached with a weak acid solution to remove the desired metal. An electric current is passed through the solution and pure metal is electroplated onto a starter cathode made of the same metal. Copper can be refined from oxide ore by this method.
In addition, copper metal initially produced by the smelting method can be purified further by using a similar electrolytic procedure.
Gold is sometimes extracted from ore by the heap leaching process. A large pile of crushed ore is sprayed with a cyanide solution. As the solution percolates through the ore it dissolves the gold. The solution is then collected and the gold extracted from it.