What is the process of melting metal called?

smelting, process by which a metal is obtained, either as the element or as a simple compound, from its ore by heating beyond the melting point, ordinarily in the presence of oxidizing agents, such as air, or reducing agents, such as coke.

In which of the following process molten metal is poured?

Explanation: A casting process in which the molten metal is poured and allowed to solidify while the mold is revolving, is called centrifugal process.

What is the process of casting metal?

Metal casting is defined as the process in which molten metal is poured into a mould that contains a hollow cavity of a desired geometrical shape and allowed to cool down to form a solidified part. The term ‘casting’ is also used to describe the part made by the casting process which dates back 6000 years.

What is the name of the process in which molten metal is poured into molds?

casting In metalworking, casting involves pouring liquid metal into a mold, which contains a hollow cavity of the desired shape, and then allowing it to cool and solidify. The solidified part is also known as a casting, which is ejected or broken out of the mold to complete the process.

What is molten metal?

Molten metal means metal or metal alloy in a liquid state, in which a cohesive mass of metal will flow under atmospheric pressure and take the shape of a container in which it is placed.

What is the process of smelting?

Smelting is an energy intensive process used to refine an ore into a usable metal. … The smelting process melts the ore, usually for a chemical change to separate the metal, thereby reducing or refining it. The smelting process requires a lot of energy to extract the metal from the other elements.

What is foundry process?

Foundry processes involve making the mould and the core, melting and pouring the metal into the mould, and finally removing the mould and core and finishing the product. … A commonly used molding material is sand. Investment materials, metals, etc.

In which of the following processes the final product is formed by pouring molten metal in the mould and allowing it to solidify?

Casting 7.5. Casting is a process in which a molten material flows into a mold and is allowed to solidify, taking the shape of the mold.

In which of the following processes the final product is formed by pouring molten metal in the mould and allowing it to solidify Mcq?

Which of the following carries the mould cavity where the metal is to be poured? Explanation: For casting to be made, the pattern is filled with the molten material and then it is allowed to be solidified, using proper cooling rates before it is extracted out. 3.

What is meant by casting process?

Casting is a manufacturing process used by the forging industry to produce an object (often metal) of a specific desired shape. This is achieved by pouring hot molten metal into a mold that contains a hollow cavity of the exact required shape.

What are the main stages of the casting process?

Basic Steps in Casting Process

Which one of the following is the name of the casting process in which molten metal is poured into a rotating mold to produce a tubular part?

Centrifuge casting Centrifuge casting: a number of moulds are arranged radially around a central sprue. Molten metal is poured into the sprue and is forced into the mould cavities by centrifugal force due to high-speed rotation.

What is foundry and forging?

Forging is a manufacturing process involving the shaping of metal using localized compressive forces. … A foundry is a factory that produces metal castings. Metals are cast into shapes by melting them into a liquid, pouring the metal into a mold, and removing the mold material after the metal has solidified as it cools.

What is sand casting process?

Sand casting, also known as sand molded casting, is a metal casting process characterized by using sand as the mold material. … The mold cavities and gate system are created by compacting the sand around models called patterns, by carving directly into the sand, or by 3D printing.

What is a foundry mold?

Foundry molds and patterns are wooden tools, carved out or built up to create negative space, which in turn is used to make the inverse form or shape to be used for the casting of metal.

Is molten metal a solid?

A liquid metal is a metal or a metal alloy which is liquid at or near room temperature. The only stable liquid elemental metal at room temperature is mercury (Hg), which is molten above −38.8 °C (234.3 K, −37.9 °F).

What is the process of applying molten metal to heat metals?

This process is known as tempering.

What is molten aluminum?

The molten aluminum is poured into molds to form ingots, billets, or pigs. As the metal cools it solidifies. Once adequately cool, the metal may be removed from the mold as a solid chunk of metal. … In some cases, the metal is further cooled with an air / water combination.

Which metals can be extracted by smelting?

Some of the metals which can be extracted by the smelting process are:

What is pyrometallurgical process?

Pyrometallurgy, extraction and purification of metals by processes involving the application of heat. It consists of the thermal treatment of minerals and metallurgical ores and concentrates to bring about physical and chemical transformations in the materials to enable recovery of valuable metals.

What is base metal smelting?

Base Metals Smelting is the production of cobalt, copper, lead, nickel and zinc through the use of pyrometallurgical, electrolytic or hydrometallurgical processes. Various co-product metals are produced, such as gold, silver, indium, germanium, cadmium, bismuth and selenium.

What protects molten metal from atmosphere in the foundry?

Charcoal is the prime material used in copper-alloy foundry. Explanation: In copper-alloy foundry practice, charcoal is used to prevent the molten metal from being oxidized, and some commercially available fluxes may be employed to cleanse the metal that is to separate it from dross.

What is difference between foundry and casting?

Foundries are simply factories that provide steel casting services. Castings are the end product created by foundries. The tools, techniques, and processes used to make castings were berthed under the roof of the foundry.

What is a ferrous foundry?

Ferrous foundry means a place where malleable iron, grey iron, nodular iron, or steel or a combination of these metals are melted and poured into molds in the making of castings.

In which of the following process molten metal is poured under high pressure?

Die casting Die casting is a moulding process in which the molten metal is injected under high pressure and velocity into a split mould die. It is also called pressure die casting.

Which type of metal is used in casting process Mcq?

This set of Machine Tools Multiple Choice Questions & Answers (MCQs) focuses on “Casting”. 1. Which type of metal is used in casting process? Explanation: In casting, generally we used metal in liquid form so that it can be easily poured and then we solidified it.

Which of the following is not casting process?

So out of given options extrusion is not a casting process it is a metal forming process. Extrusion: Metal Extrusion is a metal forming manufacturing process in which a billet is forced to flow through the desired cross-section die.

In which method the molten metal is poured and allowed to solidify while the mould is revolving?

centrifugal casting method In the centrifugal casting process, molten metal is poured into a preheated, spinning die.

Which of the following flows is responsible for to less pouring time of molten metal in the mould?

Which of the following flows is responsible for too less pouring time of molten metal in the mould? Explanation: Too less pouring time is caused by turbulent flow of nature of the molten metal.

Which of the following are the cold working processes?

The following is a list of cold forming processes: