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Extractive Metallurgy

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الكلية كلية هندسة المواد     القسم قسم هندسة المعادن     المرحلة 1
أستاذ المادة سندس عباس جاسم الحسناوي       20/03/2014 07:37:58
Introduction
The History of Man Can Be Broadly Classified into Three Divisions –
1-The Stone Age: where the old man used the non-metallic
Material like Stone and Quartz to manufacture his own tools like cutting tools, weapons and for making Fire.
2- The Bronze Age: The Transition from The stone Age Discover of the copper in around 8000 B.C. - Can be consider one of the most significant phases of human Age as it was discovered that by adding the arsenic to copper and to tin will increase the mechanical properties of copper around 4000 B.C. and this was the beginning of bronze age. The bronze was used in huge quantity to manufacture special tools beside it s use in manufacturing weapons.
3- The Iron Age: the Iron Metal was faster oxides by appearing free with air and humidity, so it is appear in Nature as oxide
The Iron Age was very important as it s extension to our age
Source of metals
Three main sources of metals and their compounds are the earth s crust, the sea, and scrap metal, the most important one being the earth s crust. The sea, which on an average, 3.5% of dissolved solids. In the cultivating specific marine organisms which would concentrate one or more elements withen their bodies by inherent biological activity. In addition, cover large areas of the sea floor.
Finally, scrap metal is becoming increasingly important and a freely available source of metal in view of the rapid industrial growth all over the world. (The metal recovered from scrap metal are called secondary metals), in current steel-making processes a significant portion of the "charge" consists of scrap metal.


المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
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