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In metallurgy, refining consists of purifying an impure metal. It is to be distinguished from other processes such as smelting and calcining in that those two involve a chemical change to the raw material, whereas in refining the final material is chemically identical to the raw material. Refining thus increases the purity of the raw material ...
The conical refiner is a chamber with metal bars mounted around the inside of the container. The material to be refined is pumped into the chamber at high-pressure rate in order to create an abrasive effect as the material is forced through the machine, abraided by the metal bars. At the opposite end of the chamber the resulting pulp is pumped out.
A hand-held tungsten carbide knife sharpener, with a finger guard, can be used for sharpening plain and serrated edges on pocket knives and multi-tools.. Sharpening is the process of creating or refining a blade, the edge joining two non-coplanar faces into a converging apex, thereby creating an edge of appropriate shape on a tool or implement designed for cutting.
- Hints, Clues and Answers to the NYT's 'Mini Crossword' Puzzle. Show comments. Advertisement. Advertisement. In Other News. Finance. Finance. Associated Press Finance. Super Bowl prices are down ...
Petroleum refinery in Anacortes, Washington, United States. Petroleum refining processes are the chemical engineering processes and other facilities used in petroleum refineries (also referred to as oil refineries) to transform crude oil into useful products such as liquefied petroleum gas (LPG), gasoline or petrol, kerosene, jet fuel, diesel oil and fuel oils.
The image below is a schematic flow diagram of a typical oil refinery depicting various unit processes and the flow of intermediate products between the inlet crude oil feedstock and the final products.
16th century cupellation furnaces (per Agricola). Cupellation is a refining process in metallurgy in which ores or alloyed metals are treated under very high temperatures and subjected to controlled operations to separate noble metals, like gold and silver, from base metals, like lead, copper, zinc, arsenic, antimony, or bismuth, present in the ore.
Bill Nye the Science Guy is a runway pro! On Tuesday, Feb. 4, the 69-year-old returned to New York Fashion Week to strut his stuff in a Thom Browne ensemble for the 9th Annual Blue Jacket Runway ...