Crushing & Grinding Machines

Methods of treating silicious materials to form silicon

This invention relates to methods of treating silicious materials and metal refining and particularly those containing ferrous metal and particularly to a method of utilizing iron bearing silicious materials such as tailings from the mining and concentration taconites non-magnetic semi-taconites low-grade highly silicious iron ores tailings resulting from mining and concentration of...

Important Questions for Class 12 Chemistry Chapter 6

Dec 06 2019 0183 32 Outline the principles behind the refining of metals by the following methods i Zone refining method ii Chromatographic method Delhi 2014 Answer i Zone refining of metals This method is based on the principle that impurities are more soluble in the molten state of the metal the melt than in the solid state...

232 Principles of Extractive Metallurgy

Aug 25 2020 0183 32 Refining a metal can be accomplished by electrolysis or zone refining Certain ores such as those of copper and titanium require special treatment before they can be refined The extraction of iron ore is particularly important for commercial uses because of the mass production of its alloy steel...

Extractive Metallurgy Introduction to Chemistry

Metal ores are formed in the process of ore genesis and they are extracted through mining Extractive metallurgy is the practice of removing valuable metals from an ore and refining the extracted raw metals into a purer form Hydrometallurgy uses aqueous solutions to extract metals from ores...

How can metal mining impact the environment American

Material adapted from Hudson TL Fox FD and Plumlee GS 1999 Metal Mining and the Environment p 7 20-27 31-35 38-39 Published by the American Geosciences Institute Environmental Awareness Seri Modern mining operations actively strive to mitigate potential environmental consequences of extracting metals and such operations are strictly regulated in the United...

Chromium processing Britannica

Chromium processing preparation of the ore for use in various products Chromium Cr is a brilliant hard refractory metal that melts at 1 857 176 C 3 375 176 F and boils at 2 672 176 C 4 842 176 F In the pure state it is resistant to ordinary corrosion resulting in its application as an electroplated...

Pyrometallurgy

Pyrometallurgy is a branch of extractive metallurgyIt 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 Pyrometallurgical treatment may produce products able to be sold such as pure metals or intermediate compounds or alloys suitable as feed for...

Metallurgy

Metallurgy - Metallurgy - Refining Refining is the final procedure for removing and often recovering as by-products the last small amounts of impurities left after the major extraction steps have been completed It leaves the major metallic element in a practically pure state for commercial application The procedure is accomplished in three ways refining...

PRODUCTION AND REFINING OF METALS electrolytic C25

Working up raw materials other than ores eg scrap to produce non-ferrous metals and compounds thereof Methods of a general interest or applied to the winning of more than two metals briquetting of scrap C22B 1/248 preliminary treatment of scrap C22B 1/005 Definition statement This place covers Dry methods C22B 7/001 - C22B 7/004...

Smelting and Refining Operations

Mar 16 2011 0183 32 Primary smelting and refining produces metals directly from ore concentrates while secondary smelting and refining produces metals from scrap and process waste Most non-ferrous metals can also be refined by electrolysis There are two main methods for the extraction of gold from ore...

US4295880A

Crushed shale and metal ores are fed via an oxygen purging duct in batches to a closed extraction chamber having a coreless high frequency electric induction furnace where the raw materials are deposited on the surface of a molten non-ferrous metal charge in the crucible of the furnace Natural induction stirring in the molten metal charge thoroughly contacts all grains of the raw material...

Smelting and Refining

Primary smelting and refining produces metals directly from ore concentrates while secondary smelting and refining produces metals from scrap and process waste Scrap includes bits and pieces of metal parts bars turnings sheets and wire that are off-specification or worn-out but are capable of being recycled see the article Metal...

REFINING OF NON

One of the earliest attempts at refining would be the ` purification of gold by thermal methods while the most recent development in this field is the solution and precipitation of metals under controlled pressures from ores and concentrates or scrap such as brass In the fire-refining of copper many im-purities are oxidized and removed in the...

methods of refining of ferrous metal ore

methods of refining of ferrous metal ore Ancient iron production - Wikipedia the free encyclopedia it can help to control the supply of refining media to the melt which were two common methods for smelting iron more carbon reacted with iron ore...

Processes of Metal Extraction and Refining

and heavy non-ferrous metals been for the past decades 4 What is the significance and what are the ways of mechanical pre-treatment in ore beneficiation 5 What physical methods can be utilised for ore beneficiation 6 What are the main types of metal containing waste materials and how is scrap prepared for metallurgical processing 7...

Enhanced methods for nickel recovery from low

Limonitic oxide lateric ores are usually treated by hydrometallurgical methods the Caron Process and Pressure Acid Leaching PAL Figure 3 Ores with high levels of magnesium are treated by the Caron process using selective reduction of the ore and ammonia leaching This method is more energy intensive and produces lower metal recovery...

Mining Methods For Ferrous Materials

Method Of Refining Ferrous Metal Ore Patent US4345746 Apparatus for refining ferrous melt A ferrous melt eg of steel is refined beneath a slag layer by blowing from above with an oxygen-containing gas through a lance and by bubbling an inert gas Inquire Now methods of refining of ferrous metal ore...

Extractive metallurgy

Extractive metallurgy is a branch of metallurgical engineering wherein process and methods of extraction of metals from their natural mineral deposits are studied The field is a materials science covering all aspects of the types of ore washing concentration separation chemical processes and extraction of pure metal and their alloying to suit various applications sometimes for direct...

The method of disposal of sulfur oxide iv leaching of

The method can be used for processing sulfide ore concentrates containing non-ferrous and precious metals The proposed disposal obtained by firing these concentrates oxide of sulfur IV to produce by its oxidation to the oxide VI with hydrogen peroxide The resulting sulfuric acid is used to leach from Ogarkov non-ferrous metals...

Extractive Metallurgy of Non

One of the most fundamental yet critical areas of metallurgy relates to the extracting of metals from ores concentrates scrap and other sources with a view to refining to the liquid state Three methods can be considered as the major processes for carrying our extractive metallurgy activities pyrometallurgy hydrometallurgy and...

Refining Crude Metals Methods Examples

Aug 19 2020 0183 32 Ferrous Metal Definition Examples What is Ore - Definition Types Uses Examples Refining Methods For metals that have a particularly low...

Methods Of Refining Of Ferrous Metal Ore

Process for melting and refining ferrous metals This invention relates to the melting and refining of small particles of ferrous metal such as cast iron borings light steel chips sponge iron and the like by feeding such materials with slag forming materials into the top of an open shaft type furnace through which they fall freely are heated by a current of hot gases formed by the combustion...

Unit 53 Extraction and Refi ning of Metals

refining of metals Investigation report including practical activiti P7 M4 Refining Processes for Ferrous and Non-ferrous Metals Chemist working for a company investigating the purity of ferrous and non-ferrous metals Case study or report on industrial visit or visiting speaker...

Refining Crude Metals Methods Examples

Ferrous Metal Definition Examples What is Ore - Definition Types Uses Examples Refining Methods For metals that have a particularly low boiling point such as mercury and zinc...

CPC Definition

Working up raw materials other than ores eg scrap to produce non-ferrous metals and compounds thereof Methods of a general interest or applied to the winning of more than two metals briquetting of scrap C22B 1/248 preliminary treatment of scrap C22B 1/005...

Metallurgy

Metallurgy - Metallurgy - Refining Refining is the final procedure for removing and often recovering as by-products the last small amounts of impurities left after the major extraction steps have been completed It leaves the major metallic element in a practically pure state for commercial application The procedure is accomplished in three ways refining by fire by electrolytic or by...

BULK OXYGEN USE IN THE REFINING OF PRECIOUS METALS

Jan 01 1987 0183 32 BULK OXYGEN USE IN THE REFINING OF PRECIOUS METALS JG Cooper JW Matousek and JG Whellock Tolltreck International Limited 7108-M South Alton Way Englewood Colorado USA 80112 ABSTRACT The employment of oxygen in bulk quantities for precious metals refining is a relatively new innovation when compared with its application in the iron and steel and...

Ferrous Metals Its Types Uses Properties Complete Guide

Ferrous Metals List Their Types and Properties 1 Pig Iron Pig Iron is the first or basic form in which Iron is prepared as the metal from its or It is therefore impure and crude and requires subsequent processing to develop Cast Wrought Iron and Steel which are the common Ferrous Metals used in construction and industri...

US3022157A

US3022157A US814875A US81487559A US3022157A US 3022157 A US3022157 A US 3022157A US 814875 A US814875 A US 814875A US 81487559 A US81487559 A US 81487559A US 3022157 A US3022157 A US 3022157A Authority US United States Prior art keywords metal manganese ore slag molten Prior art date 1959-05-21 Legal status The legal status is an assumption and is not a legal...

C22 METALLURGY FERROUS OR NON

7 / 00 Working-up raw materials other than ores eg scrap to produce non-ferrous metals or compounds thereof 7 / 02 Working-up flue dust 7 / 04 Working-up slag 9 / 00 General processes of refining or remelting of metals Apparatus for electroslag or arc remelting of metals 9 / 02 Refining by liquating filtering centrifuging...