Yttrium, · Yttrium is a chemical element with the symbol Y and atomic number 39. It is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a "rare-earth element". Yttrium is almost always found in combination with lanthanide elements in rare-earth minerals, and is never found in nature as a free ...P&Q University Lesson 2, · Most crushing sections/stages contain screens to remove the finer material before it goes into a crusher. Also, in some cases, there exists a screening/sizing section/stage in the process flow. This is where material is only screened and not reduced in size by a crusher.What is glass? | How is glass made?, · Glass is such a popular material in our homes because it has all kinds of really useful properties. Apart from being transparent, it's inexpensive to make, easy to shape when it's molten, reasonably resistant to heat when it's set, chemically inert (so a glass jar doesn't react with the things you put inside it), and it can be recycled any number of times.What Materials Are Mobile Phones Made From?, · Aluminum and magnesium are also used in the outer casing of mobile phones to protect internal components from damage. Extracting the elements required to make a cell phone is an energy intensive task that generates a lot of pollution and waste.News | sense2sort, · Improving the material quality helps to increase the selling price again. In this article, we concentrate on the non-ferrous metals after the crushers, i.e. on the light and heavy metals such as aluminium, magnesium, zinc, copper, lead and stainless steel in a.