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The ore obtained after mining contains iron in the form of iron oxide. pure iron is obtained, therefore, by the reduction of this ore. This process is carried out in the blast furnace. Temperature is different at different heights in the furnace. mixture of iron ore, lime stone
and coke is introduced the furnace from the top and a blast of burning gases is blown with pressure from an inlet near the bottom. Temperature of these gases is 1500°C.
Falling mixture and up going blast of hot gases first meet near the base. Aerial oxygen present in the blast of gases combines with coke and forms carbon dioxide with huge amount of heat energy. As this reaction is exothermic, so the temperature in this zone of furnace reaches up to 1900°C. When this carbon dioxide rises up it reacts with more carbon and forms carbon monoxide this reaction is endothermic, so temperature in this region falls up to 1100°C. CO is very good reducing agent.
It reduces iron oxide to free iron which is obtained in molten form due to high temperature. Calcium oxide (CaO) obtained by the decomposition of calcium carbonate combines with the impurities of ore i.e. silicate and aluminate. Most of calcium silicate and calcium aluminate is called slag. It is lighter than iron floats over iron.
Slag is obtained from the upper out let and is used in building material. Iron obtained from blast furnace is called pig iron. It contains 96 percent iron, 4 percent carbon and traces of sulphur, silicon, phosphorus and manganese.
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What is roasting in chemistry?
Roasting in chemistry refers to a process where a substance, such as an ore, is heated strongly in the presence of air. This process is often used to convert sulfide ores into oxide ores by driving off sulfur as sulfur dioxide gas. It is a common step in metallurgical processes to extract metals from their ores.
What is oxide ores?
Oxide ores are a type of mineral ore that contains metal oxides, typically formed through weathering processes. These ores are often easier and cheaper to process compared to sulfide ores, as they can be readily leached using methods such as hydrometallurgy. Common examples include iron ore (hematite) and aluminum ore (bauxite).
How are metals separated from ores?
Metals are separated from ores through a process called smelting, where the ore is heated to a high temperature to extract the metal. This process involves combining the ore with a reducing agent, such as carbon, to reduce the metal oxide to its pure form. The metal is then collected as a molten liquid and separated from the other components of the ore.
What is smelting process?
Smelting is a process where heat is used to extract metals from their ores. This is done by heating the ore to high temperatures, causing it to melt and separate from the impurities, leaving behind the pure metal. The extracted metal can then be further processed into usable forms.
Copper can be obtained from its ores by smelting true or false?
True. Copper can be obtained from its ores by smelting, a process that involves heating the ore in a furnace to extract the metal.
What is roasting in chemistry?
Roasting in chemistry refers to a process where a substance, such as an ore, is heated strongly in the presence of air. This process is often used to convert sulfide ores into oxide ores by driving off sulfur as sulfur dioxide gas. It is a common step in metallurgical processes to extract metals from their ores.
Is it good to obtain metal ores from the ground?
Obtaining metal ores from the ground is necessary for production of metals used in various applications. However, the extraction process can have negative environmental impacts, such as habitat destruction and pollution. It is important to balance the economic benefits of obtaining metal ores with the environmental concerns and work towards sustainable mining practices.
How is coal recoverd from the ground?
it is recoverd by mines
Write short notes on minerals and ores?
1.they are in the ground
Where are most ores found?
In the past, most ores were found at or near the surface of Earth's crust. As these ores have been largely depleted, excavations are occurring deeper within the ground.
How can metal or ores be removed from the ground?
Chelsea and adele likes fanny !
What does the mining metal ores mean?
Extracting a metal oxide from the ground
What is irons natural state in the ground?
Iron's natural state in the ground is typically found in the form of iron ores such as hematite, magnetite, and siderite. These ores are mined and processed to extract iron metal for various applications.
Does sulfur have ores?
yes , sulphur have ores. such ores are called sulphide ores. these sulphide ores are purified by the process called roasting. this is the process which involves heating with oxygen and then reducing into original metals. eg: copper sulphide, zinc sulphide, etc.
How do you test ground to see if it contains ores?
Testing the ground for ores is basically the same as mineral mining. Finding these minerals takes tools specific to the mineral. For instance, you find uranium with a gieger counter or pyrrhotite with a magnetometer.
Are metals found in the ground?
Yes, metals like iron, copper, and gold are found in the ground as part of ores. These metal ores are mined and then processed to extract the pure metal for various industrial applications.
How are ores near the earths surface removed?
Ores that are near the Earth's surface can be obtained by scraping away the soil, blasting the ore into small pieces, and removing it with heavy equipment and taking it to smelting plants. Ores that are located deep in the Earth must be mined from tunnels in deep rock.
