Which chemical process is used for smelting?

Detailed Solution. The correct answer is Reduction of metal.

What was the importance of the smelting process?

The smelting process melts the ore, usually for a chemical change to separate the metal, thereby reducing or refining it. The smelting process requires lots of energy to extract the metal from the other elements. There are other methods of extraction of pure metals from their ores.

What is the history of smelting?

The first metal to be smelted in the ancient Middle East was probably copper (by 5000 bce), followed by tin, lead, and silver. To achieve the high temperatures required for smelting, furnaces with forced-air draft were developed; for iron, temperatures even higher were required.

What is smelting in basic technology?

The process of obtaining a metal either as an element or as a simple compound from its ore by heating beyond the melting point in the presence of oxidising agents such as air and coke is known as smelting. Copper is the first metal to be smelted followed by tin, lead and silver.

What are the advantages of smelting?

It can improve the hearth efficiency and melt temperature; reduce copper rate in slag and improve the recovery rate; reduce coke rate; SO2 concentration in furnace gas increases and reduce the environmental pollution.

Is smelting a chemical reaction?

Smelting is a chemical reaction that requires a particular ore (that sometimes look like any other common sedimentary rock), a particular content of carbon and a particular temperature in order to produce the metal.

What is smelting explain with an example?

The chemical reduction of a metal from its ore by a process usually involving fusion, so that earthy and other impurities separate as lighter and more fusible slags and can readily be removed from the reduced metal. An example is the reduction of iron ore (iron oxide) by coke in a blast furnace to produce pig iron.

Who discovered smelting?

The development of iron smelting was traditionally attributed to the Hittites of Anatolia of the Late Bronze Age. It was believed that they maintained a monopoly on iron working, and that their empire had been based on that advantage.

Which metals can be extracted by smelting?

Lead, iron and zinc can be extracted by smelting process .

When was smelting invented?

The earliest current evidence of copper smelting, dating from between 5500 BC and 5000 BC, has been found in Pločnik and Belovode, Serbia. A mace head found in Can Hasan, Turkey and dated to 5000 BC, once thought to be the oldest evidence, now appears to be hammered native copper.

What is the difference between smelting and melting?

Main Difference – Melting vs Smelting Melting is the process of liquefying a solid substance by heating. It is the process by which a substance changes from the solid phase to the liquid phase. Smelting is the process by which a metal is obtained at temperatures beyond the melting point from its ore.

When was iron first smelted?

The earliest bloomery smelting of iron is found at Tell Hammeh, Jordan around 930 BC (determined from 14C dating). The Early Iron Age in the Caucasus area is conventionally divided into two periods, Early Iron I, dated to around 1100 BC, and the Early Iron II phase from the tenth to ninth centuries BC.

What effect does smelting have on the environment?

Smelting processes release air emissions that are major factors for both air and water pollution. Acid rain may be produced as a result of sulfuric acid mist being formed from these smelting plants that permeates the atmosphere.

How do you smelt gold?

Smelting gold is accomplished by using high pressure, heat and various chemicals to breakdown the ore and melt the gold to separate it from the impurities. The gold must be heated to an excess of 1046 degrees Celsius or 2150 degrees Fahrenheit.

What is the difference between smelting and refining?

In metallurgy, refining consists of purifying an impure metal. It is to be distinguished from other processes such as smelting and calcining in that those two involve a chemical change to the raw material, whereas in refining, the final material is usually identical chemically to the original one, only it is purer.

What is smelting and what is a negative effect of the process?

Smelting, the process of extracting metals from ore, played an important (and lucrative) role in US manufacturing. The process releases impurities such as lead and arsenic, which can be released through smokestacks and contaminate surrounding environments.

What are the major harmful effects of smelting?

These metals can contaminate the soil in the vicinity of smelters, destroying much of the vegetation. In addition, particulate matter emitted from smelters may include oxides of such toxic metals as arsenic (cumulative poison), cadmium (heart disease), and mercury (nerve damage).

What are the harmful effects of smelting?

Cadmium emitted from the mining and smelting operations can have harmful effects on the kidneys, the skeletal system and the respiratory system, and is a known cause of cancer. Even at low levels cadmium has also been associated with learning difficulties in children.

Can I smelt copper ore?

Davenport, et al, noted in 2002 that even then 80% of global primary copper production was from copper–iron–sulfur minerals and that the vast majority of these were treated by smelting. Copper was initially recovered from sulfide ores by directly smelting the ore in a furnace.

What is used to melt metals?

Melting Metal With a Oxyacetylene Torch. Get an oxyacetylene torch. An oxyacetylene torch mixes the gases oxygen and acetylene to make a flame that is good at reliably melting a variety of metals, including steel, brass, silver, copper, and aluminum.

What is the synonym of smelting?

Present participle for to melt a substance, especially metal. melting down. melting. diffusing. dissolving.

What are the two types of smelting?

extraction and refining …are two types of smelting, reduction smelting and matte smelting.

What is the process of smelting iron ore?

  1. Gather iron ore. Iron ore can be bought or gathered, but for the sake of demonstration, we gathered the ore ourselves.
  2. Build the furnace.
  3. Prep the reducing agent.
  4. Charge the furnace.
  5. Heating the iron ore and charcoal.
  6. Finishing touches.

How was iron first smelted?

Using the ancient “bloomery” method, iron ore was converted directly into wrought iron by heating the ore while at the same time melting the ore’s impurities and squeezing them out with hand hammers.

Is the site of the world’s oldest iron smelting technology?

“This discovery means that Enugu State has one of the oldest iron smelting sites in the world and this site is being visited by so many countries of the world.

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