Slag, the stony waste matter separated from metals during the smelting or refining of ore, is formed from impurities in the iron ores (known as the gangue), the flux and coke ash; it is a complex mixture of silica, alumina, sulfides and oxides of calcium and magnesium, as well as smaller amounts of manganese and iron
What metals are obtained by smelting?
Lead, iron and zinc can be extracted by smelting process . Aluminum can be extracted by electro metallurgy.
Which ore is smelting used for?
Smelting is a process of applying heat to ore in order to extract a base metal. It is a form of extractive metallurgy. It is used to extract many metals from their ores, including silver, iron, copper, and other base metals.
What is a by product of the smelting process?
Slag is a by-product of the metallurgical smelting process. Slag has a double role: it permits removal of impurities, known as gangue, from the melt by forming oxides.
What gas is released during smelting?
Sulfur dioxide (SO2) is a major air pollutant emitted during roasting, smelting, and the conversion of zinc, lead, copper, and nickel sulfide ore. Sulfur dioxide emission is controlled by conversion to sulfuric acid or recovery as liquid sulfur dioxide or elemental sulfur.
Which can be extracted by smelting?
Some of the metals which can be extracted by the smelting process are:
- Silver.
- Copper.
- Iron.
- Lead.
- Zinc and other base metals.
What is smelting give example?
In the smelting process a metal that is combined with oxygen—for example, iron oxide—is heated to a high temperature, and the oxide is caused to combine with the carbon in the fuel, escaping as carbon monoxide or carbon dioxide.
What happens when ore is smelted?
Smelting is a form of extractive metallurgy to produce a metal from its ore. 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.
How is metal produced from ore?
Metal is extracted from the crushed ore by one of two major methods: smelting or electrolysis. Smelting uses heat to separate the valuable metal from the rest of the ore. Smelting usually requires a reduction agent, or another chemical, to separate metal from its ore.
What does iron ore make?
Iron ore is the raw material used to make pig iron, which is one of the main raw materials to make steel—98% of the mined iron ore is used to make steel.
What is smelting waste called?
SLAG. the scum formed by oxidation at the surface of molten metals. Waste materials. convert into slag.
What is slag from metal smelting called?
During the process of smelting iron, ferrous slag is created, but dominated by calcium and silicon compositions. Through this process, ferrous slag can be broken down into blast furnace slag (produced from iron oxides of molten iron), then steel slag (forms when steel scrap and molten iron combined).
How is iron ore smelted?
Smelting involves heating up ore until the metal becomes spongy and the chemical compounds in the ore begin to break down. Most important, it releases oxygen from the iron ore, which makes up a high percentage of common iron ores. The most primitive facility used to smelt iron is a bloomery.
What pollutant is produced by copper smelting?
The main pollutants are released by the process of smelting. Most copper ores are sulphur-based and smelting releases sulphur dioxide, an air pollutant known to have many harmful effects.
What waste products are produced during copper smelting?
The smelting process typically produces less than 3 tons of solid waste per ton of copper produced. Process gas streams containing sulfur dioxide are processed to produce sulfuric acid, liquid sulfur dioxide, or sulfur.
Does copper smelting emit carbon monoxide?
In copper smelting process, first, the carbon (C) combusts with oxygen (O2) in the air to produce carbon monoxide (CO). Second, the carbon monoxide reacts with the ore and removes one of its oxygen atoms, releasing carbon dioxide. Hence, it does not release lethal quantity of CO in the environment.
Which of the following metals is not extracted by smelting?
Solution : (a) Aluminium cannot be extracted by the smelting process because :
(i) `Al`is highly electropositive element and has strong affinity for oxygen. Hence, `Al_(2) O_(3)` is a very stable compound and is not reduced by carbon.
Which metal can be extracted from bauxite ore?
Aluminium ore
Aluminium ore is called bauxite . The bauxite is purified to produce aluminium oxide, a white powder from which aluminium can be extracted. The extraction is done by electrolysis.
What is a smelting plant?
Description. Metal processing plants and smelters are facilities that extract various metals from ore to create more refined metal products. Metals include copper, nickel, lead, zinc, silver, cobalt, gold, cadmium, etc.
What is smelting in mining?
Smelting narrowly defined is the firing process that induces a reaction in which the metal is reduced and separated from the gangue. It typically takes place in a furnace in involves high temperatures.
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.
Gerardo Gonzalez loves cooking. He became interested in it at a young age, and has been honing his skills ever since. He enjoys experimenting with new recipes, and is always looking for ways to improve his technique.
Gerardo’s friends and family are the lucky beneficiaries of his delicious cooking. They always enjoy trying out his latest creations, and often give him feedback on how he can make them even better. Gerardo takes their input to heart, and uses it to continue refining his culinary skills.