air elutriation
1Elutriation — Elutriation, also known as air classification, is a process for separating lighter particles from heavier ones using a vertically directed stream of gas or liquid (usually upwards). This method is profoundly used for particles with size (>1ųm)… …
2Élutriation — Séparateur à Air L élutriation sert à déterminer la taille des particules à l aide de la loi de Stokes. On envoie dans une colonne un fluide à une vitesse connue et les particules en chute restent en suspension quand la vitesse du fluide est… …
3separation and purification — ▪ chemistry Introduction in chemistry, separation of a substance into its components and the removal of impurities. There are a large number of important applications in fields such as medicine and manufacturing. General principles… …
4cement — cementable, adj. cementer, n. cementless, adj. /si ment /, n. 1. any of various calcined mixtures of clay and limestone, usually mixed with water and sand, gravel, etc., to form concrete, that are used as a building material. 2. any of various… …
5Gasification — This article is about the process. For the water carbonator, see Gasogene. For the automobile device, see Wood gas generator. Sustainable energy …
6Green chemistry — Green chemistry, also called sustainable chemistry, is a chemical philosophy encouraging the design of products and processes that reduce or eliminate the use and generation of hazardous substances. Whereas environmental chemistry is the… …
7Separation process — In chemistry and chemical engineering, a separation process, or simply a separation, is any mass transfer process used to convert a mixture of substances into two or more distinct product mixtures, at least one of which is enriched in one or more …
8MÉTALLURGIE - Métallurgie extractive — Le caractère dominant de la métallurgie extractive moderne est que tout métal, quel qu’il soit, peut, pour répondre à un besoin nouveau, devenir un métal industriel. La comparaison des métallurgies particulières fait ressortir des différences… …
9Pottery of ancient Greece — Bilingual amphora by the Andokides Painter, ca. 520 BC (Munich) As the result of its relative durability, pottery is a large part of the archaeological record of Ancient Greece, and because there is so much of it (some 100,000 vases are recorded… …
10mercury processing — Introduction preparation of the ore for use in various products. Mercury (Hg) has a unique combination of physical properties. Its low melting point (−38.87° C [−38° F]) and boiling point (356.9° C [674° F]), high specific gravity (13 …
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