Metallurgy is the process of extraction of metal from their ores.
And when concentrated or roasteded ore is heated with iron is known as smelting.
(Wed, Sep 28, 2011 11:34:17 PM)
Smelting uses heat and a chemical reducing agent to change the oxidation state of the metal ore; the reducing agent is commonly a source of carbon such as coke, or in earlier times charcoal
Rajesh Kumar said:
(Sat, Dec 17, 2011 10:34:19 AM)
I cannot explain this answer so please give the accurate and easy example and explain it.
(Fri, Jan 20, 2012 09:00:33 PM)
Metallurgy is the process of extracting metal from their ores... the metals ores heated or fused with some reducing agent this is called smelting....
Ali Sir Damoh said:
(Wed, Apr 4, 2012 04:46:42 PM)
The pure metal is obtained by ore like Al is obtained by bauxite metallurgy has many step.
(Fri, Apr 20, 2012 08:52:41 PM)
Use the coak and silica impurities to remove the metals like As, Antimony, Bi.
Haresh Kumar said:
(Wed, May 9, 2012 08:35:27 PM)
Metallurgy is the process in which metal is extracted from its ore by heating/reducing
Pramod Kumar said:
(Tue, Feb 26, 2013 07:34:39 PM)
Please tell me how can change antimony sulphate (sb2so4) into antimony sulphite (sb2so3).
How Sulfite sulphate or any change to?
Okoh Emmanuel said:
(Tue, Mar 19, 2013 11:03:04 PM)
Metallurgy is the process whereby ore are reduce by heating them with co2 or coke to obtain a pure metal. The heating of this ore is called smelting.
(Sat, Apr 6, 2013 03:30:53 PM)
What is difference between orbit and shell?
(Sun, Nov 3, 2013 11:03:43 AM)
calcinations is the process take place in the presence of oxygen.
Roasting is the process take place in the absence of oxygen.
(Sun, Nov 3, 2013 11:08:25 AM)
According to my knowledge I think orbit is the path that electron move whereas shell is the place where electrons are present.
(Thu, Nov 21, 2013 08:04:20 AM)
Smelting means concentrated ore is obtained in its melted state.
Santosh Gaidhankar said:
(Mon, Jan 6, 2014 11:46:18 AM)
Metallurgy is process of extracting metal from their ores for that purpose ignition that is heat required after heating metal fuses that process is called smelting. In short it just a fused metal form due to heating.
(Mon, Feb 10, 2014 04:12:44 PM)
Smelting is to fuse or melt (ore) in order to separate the metal contained.
Sandeep Avhad said:
(Tue, May 20, 2014 03:12:55 PM)
Smelting is a form of extractive metallurgy; its main use is to produce a metal from its ore. This includes production of silver, iron, copper and other base metals from their ores. Smelting uses heat and a chemical reducing agent to decompose the ore, driving off other elements as gasses or slag and leaving just the metal behind. The reducing agent is commonly a source of carbon such as coke, or in earlier times charcoal. The carbon (or carbon monoxide derived from it) removes oxygen from the ore, leaving behind elemental metal. The carbon is thus oxidized in two stages, producing first carbon monoxide and then carbon dioxide. As most ores are impure, it is often necessary to use flux, such as limestone, to remove the accompanying rock gangue as slag.
Plants for the electrolytic reduction of aluminium are also generally referred to as smelters. These do not melt aluminium oxide but instead dissolve it in aluminium fluoride. They normally use carbon electrodes, but novel smelter designs use electrodes that are not consumed in the process. The end product is molten aluminium.
(Thu, May 22, 2014 09:46:30 AM)
What is calcination?
(Wed, Nov 12, 2014 01:49:49 PM)
If the ore is not oxide and found as carbonate or sulphide then it is subjected to calcination.
Calcination is process of heating carbonate ores in absence of oxygen.
Eg: CaCO3 gives on calcination CaO +CO2.
(Thu, Mar 19, 2015 08:50:24 AM)
What is fused state?
Peweh Rosine said:
(Sat, May 30, 2015 01:31:07 PM)
I will like being this online chemistry. But I don't understand the meaning of calcination, those two definition are confusing.
(Sun, Aug 23, 2015 11:48:27 AM)
Fused state means molten state and calcination means heating of carbonate ore like caco3 in absence of air.