Mineral,Processing,History,Are business, insurance Mineral Processing: History, Areas and Processes
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Theseparation of minerals from the ores they are present in is known as mineral processing.This process has been dramatically changed over the years as new technology hasbeen introduced to replace many of the methods used centuries ago. A Brief History of Mineral ProcessingHundredsof years ago, prior to the invention of machinery, raw ores went through a processknown as spalling, which used hammers to break up ore. It wasnt longbefore mechanicalmethods were created to assist and ease the process. Infact, it has been found that mechanicalmeans such as stamp mills werein use in 973 and possibly prior. TheCornish stamps were introduced later and this newer version of the stamp mill consistedofseveral iron hammers that were mounted vertically on a frame. Cams presenton the waterwheelshaft were used to raise the hammers and they fell by gravity,thus breaking the ore. Awide array of other machinery was invented and used over the years, but we havemuch moreadvanced machinery in use today. The Four Areas of Mineral ProcessingMineralprocessing may involve as many as four types of operation, although all four maynot berequired in every circumstance. The four operations includecomminution, sizing, concentrationand de-watering and each plays an importantrole in mineral processing. More insight into eachof these types ofoperation is discussed below. Comminution is used to reduce theparticle size of the material being mined. This process can be performed onboth slurries and dry materials. It involves crushing the ore right out of the mine,then grinding it into smaller pieces. Sizing is used to separate theparticles according to yes, size. This can be done via screening using singleor multiple screens, and can incorporate water, shaking or vibration to aid inthe separation of materials. Particle size analysis plays a large role in thisprocess. Concentration is necessary to obtainmore of the desired minerals and several methods exist to achieve this. Theoldest of these methods is gravity concentration, which classifies theparticles based on the specific gravity of each. Other methods include: frothflotation, which separates particles according to surface chemistry; electrostaticseparation, which uses either electrostatic separators or electrodynamic separatorsto concentrate the particles of desired minerals; automated sorting, which is themost modern and uses a combination of optical sensors coupled with magnetic sensorsand electrical conductivity to sort materials into several categories; and magneticseparation, which uses magnets to separate and concentrate the particles of desiredminerals. Dewatering removes any water presentin the particles, which helps to make the handling and transport processsimpler. It also allows additional processing measures to occur. This process canrange in price, but is often more expensive when performed on smaller particlesizes. Additional Processes and Considerations in Mineral ProcessingTheincorporation of pyrometallurgical or hydrometallurgical processes may be usedbymechanical plants to extract the minerals. In addition, the storage,handling and transport ofmaterials are also considered to be a part ofmineral processing. Tofind out more about superalloys and general mining topics, please visit PublicMining.org,a free resource directory showcasing public mining companies like Golden Share Mining, Coronado Resources and thousands more.
Mineral,Processing,History,Are