Reaction thermite

Ferrovanadium can also be prepared by the thermite reaction, in which vanadium and iron oxides are co-reduced by aluminum granules in a magnesite-lined steel vessel or in a water-cooled copper cmcible (11) (see Aluminumand aluminum alloys). The reaction is initiated by a barium peroxide—aluminum ignition charge. This method is also used to prepare vanadium—aluminum master alloys for the titanium industry. 

Sparks created by arcs in electrical switchgear, engines, motors, or by friction (e.g. lighter spark). Aluminium, magnesium, titanium and their alloys have an affinity for oxygen and in a thermite reaction with rust produce temperatures <3000°C. A thermite flash can result from the... 

Reaction with other substances Thermite reaction Rust Exothermic reactions with aluminium, aluminium alloys... 

Striking of a smear or thin coating of alloy on rusty steel with a hammer. The glancing impact of stainless steel, mild steel, brass, copper-heryllium hronze, aluminium copper and zinc onto aluminium smears on rusty steel can initiate a thermite reaction of sufficient thermal energy to ignite flammahle gas/vapour-air atmosphere or dust clouds. 

Chemical reaction sources catalysis, reaction with powerful oxidants, reaction of metals with halocarhons, thermite reaction, thermally unstahle materials, accumulation of unstahle materials, pyrophoric materials, polymerization, decomposition, heat of adsorption, water reactive solids, incompatihle materials. 

The thermite reaction was once used to weld rails ... 

The thermite reaction is spectacular and highly exothermic. It involves the reaction between Fe203, ferric oxide, and metallic aluminum. The reaction produces white-hot, molten iron in a few seconds. Given ... 

How much energy is released in the manufacture of 1.00 kg of iron by the thermite reaction mentioned in Problem 10 ... 

Thermal equilibrium, 56 Thermite reaction, 122 Thermometers, 56 Thiosulfate ion, 362 Third-row elements, 101 compounds, 102 physical properties, 102 properties, table, 101 Third row of the periodic table, 364 Thomson, J. J., 244 Thomson model of atom, 244 Thorium... 

FIGURE 6.8 The thermite reaction is so exothermic that it melts the metal that it produces and is used to weld railroad tracks together. Here, aluminum metal is reacting with iron(lll) oxide. Fe20 causing a shower of molten iron sparks. 

Write the chemical equation that describes each of the following processes (a) the production of chromium by the thermite reaction (b) the corrosion of copper metal by carbon dioxide in moist air (c) the purification of nickel by using carbon monoxide. 

Reactions with other substances Thermite reaction... 

C04-0079. The following unbalanced reaction is called the thermite reaction. It releases tremendous amounts of energy and is sometimes used to generate heat for welding ... 

C19-0015. The thermite reaction between aluminum metal and iron oxide is so rapid and exothermic that it generates a fountain of sparks (see photo) and can melt the container in which it takes place. The spontaneity of this reaction suggests the possibility of a galvanic cell involving aluminum and... 

Chromium (III) oxide gave rise to a very violent reaction with lithium heated to 180 C. The temperature exceeds 1000 C. It is a typical thermite reaction during which a more electropositive metai violentiy reduces an oxide by forming a metal, which is chromium in this particular case. However, the mixture needs to reach a high temperature to be able to react. 

Cadmium oxide gives rise to a violent thermite reaction with magnesium when it is heated. Detonations occur during this reaction. 

When it is hot, tin oxide is reduced violently by electropositive metals in thermite reactions. This goes for sodium, potassium, magnesium and aluminium. 

Barium sulphate is not a strong oxidant yet it can give rise to a very violent thermite reaction when it is heated in the presence of a very electropositive metal. This applies to aluminium for which an accident was described. In addition, there was an accident which involved a mixture of this sulphate with red phosphorus although the latter had been previously treated with potassium nitrate and calcium silicide. 

Lead oxide reacts violently with numerous metals such as sodium powder (immediate ignition), aluminium (thermite reaction, which is often explosive), zirconium (detonation), titanium, some metalloids, boron (incandescence by heating), boron-silicon or boron-aluminium mixtures (detonation in the last two cases). Finally, silicon gives rise to a violent reaction unless it is combined with aluminium (violent detonation). It also catalyses the explosive decomposition of hydrogen peroxide. 

Many metal oxo-compounds (nitrates, oxides and particularly sulfates) and sulfides are reduced violently or explosively (i.e. undergo thermite reaction) on heating an intimate mixture with aluminium powder to a suitably high temperature to initiate the reaction. Contact of massive aluminium with molten salts may give explosions [1], Application of sodium carbonate to molten (red hot) aluminium caused an explosion [2]. 

See Iron(III) oxide Aluminium, See other molten salt baths, thermite reactions... 

A joint between a mild steel valve screwed onto an aluminium pipe was leaking a resin-solvent mixture, and when the joint was tightened with a wrench, a flash fire occurred. This was attributed to generation of sparks by a thermite reaction between the rusted steel valve and the aluminium pipe when the joint was tightened [1]. Hazards involved in the use of aluminium-sprayed steel are reviewed [2],... 

Accidental contact of the molten alloy (26% Al) with a wet rusty iron surface caused violent explosions with brilliant light emission. Initial evolution of steam, causing fine dispersion of the alloy, then interaction of the fine metals with rust in a thermite reaction, were postulated as likely stages. Direct interaction of the magnesium (74%) with steam may also have been involved. 

See Aluminium, etc., Boron, etc. and Barium chromate, etc., all above See other frictional initiation incidents, static initiation incidents See also thermite reactions... 

An attempted thermite reaction with aluminium powder and copper(II) oxide in place of iron(III) oxide caused a violent explosion. An anonymous comment suggests that a greater reaction rate and exothermic effect were involved, and adds that attempted use of silver oxide would be even more violent [1]. An explosion... 

The anhydrous salt will undergo a thermite reaction with aluminium to produce molten iron. 

An intimately powdered mixture, usually ignited by magnesium ribbon as a high-temperature fuse, reacts with an intense exotherm to produce molten iron and was used formerly (before the advent of gas or arc welding) in the commercial thermite welding process. Incendive particles have been produced by this reaction on impact between aluminium and rusty iron. (The term thermite reaction has now been extended to include many combinations of reducing metals and metal oxides) [1], Some accidents in demonstrating the thermite reaction are described [2],... 

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