# thods used removing ores from rock

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##### Copper Mining and Extraction Sulfide Ores

Copper can be extracted from its ore by: Underground: sinking a vertical shaft into the Earth to an appropriate depth and driving horizontal tunnels into the ore. Open pit: 90% of ore is mined by this method. Ores near the surface can be quarried after removal of the surface layers. The ore is treated with dilute sulfuric acid.

##### LIST OF ORES AND THEIR NAMES SULPHIDE ORE

3/10/2017· LIST OF ORES AND THEIR NAMES SULPHIDE ORE PbS Galena HgS Cinnabar ZnS Zinc blende Cu2S Copper glance CuFeS2 Copper Pyrites (Chalcopyrite) FeS2 Iron pyrites or Fool''s gold Ag2S Silver glance or Argentite Cu2S.Ag2S Copper silver glance Ag2S.Sb2S3 Pyrargirite or Rubisilver HALIDE ORE NaCl Rock Salt KCl Sylvine

##### Extracting Gold from Rock - PBS

We used mercury to actually extract the gold from the powdered rock. Gold, like most minerals, can be ''dissolved'' in mercury to create what''s called an amalgam. An amalgam is a physical mixture of

##### Processes - extraction, mining, smelting, refining

First, the ore is treated with dilute sulphuric acid. This trickles slowly down through the ore, over a period of months, dissolving copper to form a weak solution of copper sulphate. The copper is then recovered by electrolysis. This process is known as SX-EW (solvent extraction/electrowinning).

##### Ancient Mining Tools and Techniques - Owlion - Eduion

30/4/2018· Many of the tools were made from rock and were used to break brittle ore. As late as the first century AD, Roman reporters claimed that flint was the hardest of materials. Small flint picks and hammers have been discovered around the world. The Egyptians mined

##### Crude Metal From Concentrated Ore | What Is Extraction Of

Conversion to Oxide In this process, metal refining is done by heating the ore in a limited supply or absence of air. This is done with the aim of bringing about thermal decomposition and remove volatile compounds from the ore leaving behind a metal oxide. Fe 2 O 3.xH 2 O(s) $$\require{AMScd} \begin{CD} @> >> \end{CD}$$ Fe 2 O 3 (s) + xH 2 O(g)

##### Gold extraction - Wikipedia

Hard rock ores have formed the basis of the majority of commercial gold recovery operations since the middle of the 20th century where open pit and or sub-surface mining techniques are used. Once the ore is mined it can be treated as a whole ore using a dump leaching or heap leaching processes. This is typical of low-grade, oxide deposits.

##### Extraction of Resources | Geology - Lumen Learning

An ore. is a rock that contains enough of a metal or a metal compound to make extracting. the metal worthwhile, eg either: low grade ores contain a small percentage of the metal or its compound

##### Copper extraction - Wikipedia

Copper extraction refers to the methods used to obtain copper from its ores. The conversion of copper consists of a series of physical and electrochemical processes. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors.

##### Mining and Mineral Use | Earth Science

Underground mining is used to recover ores that are deeper into Earth’s surface. Miners blast and tunnel into rock to gain access to the ores. How underground mining is approached – from above, below, or sideways – depends on the placement of the ore body, its depth, concentration of ore, and the strength of the surrounding rock.

##### Ores And Minerals - Definition, Types & Differences with

Ore is natural rock or sediment that contains one or more valuable minerals, typically metals, that can be mined, treated and sold at a profit. Ore is extracted from the earth through mining and treated or refined, often via smelting, to extract the valuable metals or minerals.

##### A Brief Introduction to the Types of Surface Mining

In such sites, the ore is accessed by removing the rock above the ore, by planting explosives in it. The ore is then removed, while the waste produced is deposited in river valleys or previously excavated mines. It is the newest method of surface mining, and is mostly used to extract coal.

##### LIST OF ORES AND THEIR NAMES SULPHIDE ORE

3/10/2017· LIST OF ORES AND THEIR NAMES SULPHIDE ORE PbS Galena HgS Cinnabar ZnS Zinc blende Cu2S Copper glance CuFeS2 Copper Pyrites (Chalcopyrite) FeS2 Iron pyrites or Fool''s gold Ag2S Silver glance or Argentite Cu2S.Ag2S Copper silver glance Ag2S.Sb2S3 Pyrargirite or Rubisilver HALIDE ORE NaCl Rock Salt KCl Sylvine

##### Extracting metals - How are metals with different

An ore. is a rock that contains enough of a metal or a metal compound to make extracting. the metal worthwhile, eg either: low grade ores contain a small percentage of the metal or its compound

##### Biological methods of metal extraction - Higher - Ways of

Life cycle assessments can evaluate the environmental impact of a product. Many products are recycled to lessen environmental impact. Modern metal extraction can reduce the impact on the environment.

##### Ores And Minerals - Definition, Types & Differences with

Ore is natural rock or sediment that contains one or more valuable minerals, typically metals, that can be mined, treated and sold at a profit. Ore is extracted from the earth through mining and treated or refined, often via smelting, to extract the valuable metals or minerals.

##### High School Earth Science/Mining and Using Minerals

24/9/2020· If it is profitable to mine the ore, they decide the way it should be mined. The two main methods of mining are surface mining and underground mining. Surface Mining . Surface mining is used to obtain mineral ores that are close to Earth''s surface.

##### Gold extraction - Wikipedia

Hard rock ores have formed the basis of the majority of commercial gold recovery operations since the middle of the 20th century where open pit and or sub-surface mining techniques are used. Once the ore is mined it can be treated as a whole ore using a dump leaching or heap leaching processes. This is typical of low-grade, oxide deposits.

##### Copper extraction - Wikipedia

The average grade of copper ores in the 21st century is below 0.6% copper, with a proportion of economic ore minerals (including copper) being less than 2% of the total volume of the ore rock. A key objective in the metallurgical treatment of any ore is the separation of ore minerals from gangue minerals within the rock.

##### Copper Mining and Extraction Sulfide Ores

Copper can be extracted from its ore by: Underground: sinking a vertical shaft into the Earth to an appropriate depth and driving horizontal tunnels into the ore. Open pit: 90% of ore is mined by this method. Ores near the surface can be quarried after removal of the surface layers. The ore is treated with dilute sulfuric acid.