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Metallurgy

Metallurgy is the study of metals and compounds. It includes the technology and advancement of refinement and casting techniques.

215 Questions

What is the primary function of the solvent extraction in Metallurgy extractive industry?

The primary function of solvent extraction in the metallurgical extractive industry is to selectively separate and concentrate specific metals or minerals from a solution. This process allows for the extraction of valuable metals from ores or solutions by using a solvent that can selectively dissolve the desired metal, separating it from impurities.

What are the steps in metallurgy of mercury?

Mercury is typically obtained through the process of roasting cinnabar ore (HgS) to form mercury vapor, which is then condensed and collected. The collected mercury is then typically purified using distillation to remove impurities and improve its quality. Finally, the purified mercury can be further processed and utilized in various applications such as in thermometers, electrical equipment, and chemical processes.

What size is -20 mesh in metallurgy?

In metallurgy, -20 mesh refers to a particle size where the material can pass through a screen with 20 holes per linear inch. This means that particles larger than the openings on a 20-mesh screen are retained on top. The actual size will vary depending on the specific screening standards used in metallurgy.

What are the process involved in metallurgy?

Metallurgy involves several processes, such as mining and extraction of ores, crushing and grinding of the ore, concentrating the ore through physical or chemical methods, and finally refining and purifying the metal through various techniques like smelting, electrolysis, or thermal processes. The extracted metal is then shaped into usable products through casting, molding, rolling, or forging.

How reducing agent used in metallurgy?

A reducing agent is used in metallurgy to remove oxygen from metal ores during the process of extraction. It provides electrons to the metal ions in the ore, which reduces them to their elemental form. Common reducing agents include carbon, carbon monoxide, and hydrogen.

What are the two types of flux used in metallurgy?

The two types of flux used in metallurgy are acidic flux and basic flux. Acidic fluxes are used to remove impurities by forming acidic slag, while basic fluxes are used to form basic slag and improve the flow characteristics of the molten metal.

Why are coke and flux used in melting process of metallurgy?

Coke is used as a fuel to provide high temperatures needed for the melting process in metallurgy, while flux is used to purify the metal by removing impurities and protecting it from oxidation during the melting process. Together, coke and flux help create a suitable environment for the efficient melting and refining of metals.

Why calcium chloride is added with sodium chloride in metallurgy of sodium?

Calcium chloride is added to sodium chloride in the metallurgy of sodium because it helps lower the melting point of the mixture, making it easier to separate sodium metal from the molten mixture. This lower melting point allows for better efficiency in the electrolysis process.

What is origin of science of metallurgy in ancient India?

Metallurgy in ancient India is believed to have originated around 1200 BCE in the Indus Valley Civilization. Archaeological discoveries such as bronze artifacts suggest an advanced understanding of metallurgical techniques during this time. The knowledge and innovation in metallurgy continued to evolve in subsequent civilizations such as the Mauryan and Gupta Empires.

What Is Corrosion in Metallurgy?

Corrosion in metallurgy refers to the deterioration of metal due to a chemical reaction with its environment. This reaction can lead to the formation of rust and weakening of the metal's structure, compromising its integrity and functionality. Various factors such as moisture, oxygen, and pollutants can accelerate the corrosion process.

Why do some metal corrode while others do not?

All metals corrode under the right conditions only some more easily then others. as it turn out the metals that corrode most easily are usually also the most abundant.

What element was named from the latin word fluere because its compounds are often used as a fluxes in metallurgy?

The element is named Fluorine. It comes from the Latin word "fluere" because its compounds, known as fluorides, are frequently used as fluxes in metallurgy due to their ability to lower the melting points of metal oxides.

What is the corrosive mix used in metallurgy?

One common corrosive mix used in metallurgy is a solution of hydrochloric (HCl) acid and nitric acid (HNO3), known as aqua regia. This mixture is capable of dissolving noble metals like gold and platinum due to its strong oxidizing properties. Aqua regia is often used to test the purity of precious metals and in certain refining processes.

Who invented metallurgy?

Metallurgy is believed to have been independently developed by different ancient cultures, with evidence of early metalworking found in various regions such as Mesopotamia, Egypt, and Indus Valley. While it is challenging to attribute the invention of metallurgy to a single individual, it is clear that the knowledge of working with metals developed over time through experimentation and innovation by ancient civilizations.

Is powder metallurgy done in element 6?

Yes, powder metallurgy is a process that involves forming metal powders into desired shapes and then heating them to bond the powder particles. Element 6, also known as carbon (C), is not typically used in the powder metallurgy process, as it is not a metal and does not behave in the same way as metallic elements during sintering.

What is a metallurgy lab?

A metallurgy lab is a facility where metals and materials are analyzed, tested, and researched to evaluate their properties, performance, and structure. These labs are critical for understanding the behavior of metals under different conditions and for quality control in manufacturing processes.

What metals are not extracted from the earth using metallurgy?

Metals such as gold, silver, and platinum are often found in their pure form in nature and can be obtained without the need for extensive metallurgical processes. These metals are usually collected through mining or panning techniques rather than traditional metallurgy.

What is the difference between low temperature carbon steel and low hydrogen steel?

Low temperature carbon steel is designed to withstand lower temperatures without becoming brittle, while low hydrogen steel is designed to minimize hydrogen-induced cracking during welding by reducing the hydrogen content in the steel. Essentially, low temperature steel focuses on the material's behavior under low temperatures, while low hydrogen steel focuses on preventing specific types of cracking during welding.

What is the difference between pyro metallurgy and hydro metallurgy?

Pyrometallurgy involves using high temperatures to extract metals from ores, while hydrometallurgy uses aqueous solutions to dissolve and extract metals. Pyrometallurgy is typically used for high melting point metals, while hydrometallurgy is more suitable for low melting point metals or when environmental concerns are important.

What is production metallurgy?

Production metallurgy is the branch of metallurgical engineering that focuses on the processes involved in transforming raw materials into useful metal products. This includes refining, casting, rolling, forging, and heat treating metals to improve their properties for specific applications. The goal of production metallurgy is to optimize the manufacturing processes to ensure high-quality and cost-effective metal products.

What is the difference between micro and macro examination in metallurgy field?

Macro Examination

Macroetching is the procedure in which a specimen is etched and evaluated macro structurally at low magnifications. It is a frequently used technique for evaluating steel products such as billets, bars, blooms, and forgings. There are several procedures for rating a steel specimen by a graded series of photographs showing the incidence of certain conditions and is applicable to carbon and low alloy steels. A number of different etching reagents may be used depending upon the type of examination to be made. Steels react differently to etching reagents because of variations in chemical composition, method of manufacturing, heat treatment and many other variables.

Macro-Examinations are also performed on a polished and etched cross-section of a welded material. During the examination, a number of features can be determined including weld run sequence, important for weld procedure qualifications tests. As well as this, any defects on the sample will be assessed for compliance with relevant specifications. Slag, porosity, lack of weld penetration, lack of sidewall fusion and poor weld profile are among the features observed in such examinations. It is normal to look for such defects either by standard visual examination or at magnifications of up to 50X. It is also routine to photograph the section to provide a permanent record. This is known as a photomacrograph.

Micro Examination

This is performed on samples either cut to size or mounted in a resin mold. The samples are polished to a fine finish, normally one micron diamond paste, and usually etched in an appropriate chemical solution prior to examination on a metallurgical microscope. Micro-examination is performed for a number of purposes, the most obvious of which is to assess the structure of the material. It is also common to examine for metallurgical anomalies such as third phase precipitates, excessive grain growth, etc. Many routine tests such as phase counting or grain size determinations are performed in conjunction with micro-examinations

What will happen to steel railroad tracks on a hot day if they were laid out during a cold day without gap?

The steel rails may expand due to the heat, causing the tracks to buckle or curve up. This can lead to derailments and damage to the tracks. It is important to leave gaps between rails to allow for expansion and contraction due to temperature changes.

What is HV in metallurgy?

It is most likely to refer to Hardness Vickers, a method amongst 4 main methods for determining the surface hardness of a material.

The four main methods are Vickers, Brinell, Shore and Rockwell that are differentiated by a number of factors including the size, and shape of the penetrator used, the load applied to the penetrator and the reading method.

The different methods also often have different sub-scales.

What is definition of metallurgy?

Metallurgy is the branch of science and technology that deals with the properties and production of metals and their alloys. It involves extraction, purification, and processing of metals to create useful materials for various applications.

What are the process of metallurgy?

Metallurgy involves several key processes:

  1. Mining: extraction of ores from the earth
  2. Crushing and grinding: breaking down the ores into smaller particles
  3. Smelting: heating the ore to high temperatures to extract the metal
  4. Refining: purifying the extracted metal through various methods
  5. Shaping and forming: forging, casting, or machining the metal into desired shapes.