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Large number of impurities present in ore, such as sand, soil, etc., is called
Gangue
Wrought
Spongy
Hardness of ore
Gangue
The naturally occurring earthly materials, sand, rocky debris, clay, and soil mixed with extracted minerals and ores are collectively known as gangue or matrix. During metallurgy, these unwanted impurities are removed by adding a suitable chemical flux that reacts with them to form a fusible mass called slag.
The naturally occurring earthly materials, sand, rocky debris, clay, and soil mixed with extracted minerals and ores are collectively known as gangue or matrix. During metallurgy, these unwanted impurities are removed by adding a suitable chemical flux that reacts with them to form a fusible mass called slag.
Think of panning for gold in a river: the gold nuggets are valuable, but they are heavily mixed with unwanted mud, sand, and pebbles. The mud and sand correspond to the gangue, which must be washed away to obtain pure gold.
Gangue is Garbage: G-A-N-G-U-E stands for unwanted Garbage in ores.
Gangue+FluxтЖТSlag тАФ General metallurgical reaction for removing impurities
In metallurgy, the ore obtained from mines is contaminated with rocky and sandy impurities. These impurities (gangue) are removed in the initial concentration or smelting steps. A flux is added during smelting to react with the acidic or basic gangue, converting it into a separate, lower-density molten layer called slag which floats on top of the molten metal and is easily skimmed off.
Gangue refers to the commercially valueless material in which an ore is found.
Common examples of gangue include silica (SiO2тАЛ), alumina (Al2тАЛO3тАЛ), and mud or sand.
The removal of gangue is the primary objective of ore concentration processes.
Basic gangue is removed using acidic fluxes (like SiO2тАЛ), while acidic gangue is removed using basic fluxes (like CaO).
Concentration of ore increases the percentage of metal before smelting
Reduces the quantity of fuel and flux required in the furnace
Generation of tailings and slag causes environmental pollution if not managed properly
Extraction of iron in blast furnaces
Purification of copper, zinc, and aluminum ores
Slag is the fusible mass formed by the combination of flux and gangue during smelting.
Wrought iron is the purest form of commercial iron.
Option B (Wrought) refers to wrought iron, a pure form of iron, not impurities.
A is correct тАФ Large amounts of earthy impurities such as sand, soil, and rocks found associated with ores are called gangue.
Remember that gangue is the 'waste' removed during concentration, whereas slag is the 'byproduct' formed when flux reacts with leftover gangue during smelting.
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