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A metallurgical furnace, often simply referred to as a furnace when the context is known, is an industrial furnace used to heat, melt, or otherwise process metals. Furnaces have been a central piece of equipment throughout the history of metallurgy ; processing metals with heat is even its own engineering specialty known as pyrometallurgy .
Of course many pollutants kill plants, so phytoremediation is not a panacea. For example, chromium is toxic to most higher plants at concentrations above 100 μM·kg−1 dry weight. [16] Mining of these extracted metals through phytomining is a conceivable way of recovering the material. [17] Hyperaccumulating plants are often metallophyte.
Smelting involves more than just melting the metal out of its ore. Most ores are the chemical compound of the metal and other elements, such as oxygen (as an oxide), sulfur (as a sulfide), or carbon and oxygen together (as a carbonate). To extract the metal, workers must make these compounds undergo a chemical reaction.
A reducing environment (often provided by carbon monoxide in an air-starved furnace) pulls the final oxygen atoms from the raw metal. Lead is usually smelted in a blast furnace, using the lead sinter produced in the sintering process and coke to provide the heat source. As melting occurs, several layers form in the furnace.
These low-maintenance plants will stay green with even the tiniest bit of TLC. The post 20 Hard-to-Kill Houseplants Anyone Can Grow appeared first on Reader's Digest. ... 800-290-4726 more ways to ...
Its relatively low melting point (660 °C) means that it is easy to melt the metal, so that the reaction can occur mainly in the liquid phase, thus it proceeds fairly quickly. Its high boiling point (2519 °C) enables the reaction to reach very high temperatures, since several processes tend to limit the maximum temperature to just below the ...
The hobby is enjoyed by many, but there are some specimens best avoided. Among them is Hutchinsonite, as inhaling its dust or ingesting bits of it can be fatal.
Moments after gathering a giant hogweed plant with her bare hands, 10-year-old Lauren Fuller's hands began to melt as she suffered third-degree burns. The girl may now need skin grafts.