Iron separation

Lin, Y., Weng, C. and Chen, F. (2008) Effective removal of AB24 dye by nano/ micro-size zero-valent iron. Separation and Purification Technology, 64, 26-30. Wang, C.B. and Zhang, W.X. (1997) Synthesizing nanoscale iron particles for rapid and complete dechlorination of TCE and PCBs. Environmental Science and Technology, 31, 2154-2156. 

Cupertino, D. C. Charlton, M. H. Buttar, D. Swart, R. M. Maes, C. J. A study of copper/iron separation in modern solvent extraction plants. Proceedings of the COPPER 99-COBRE 99 International Conference, 4th, Phoenix, Oct. 10-13, 1999, 4, 263-276. 

The ecoriie siirrod into the molted. metal, says Berzelius, consist of oxide of iron vitrified with silica and other earthy substances, al] of which contain oxygen, and thiB, reacting on the carben of the east-iron, separates it in the state of inflammable gas—carbonic oxide, The best qualify of Swedish bar-iron was found by the above-mentioned illustrious ehemiettb contain half a per cent, of carben and one-tenth of a per cent, of siljcium,... 

Fig. 1. Schematic flowsheet of uranium processing (acid leach and ion exchange) operation. Numbers refer to the numbers that appear in the boxes on the flowsheet. Operations (3), (6), (9), and (11) may be done by thickening or filtration. Most often, thickeners are used, followed by filters. The pH of the leach slurry <4) is elevated to reduce its corrosive effect and to improve the ion-exchange operation on the uranium liquor subsequently separated, In tile ion exchange operation (7), resin contained in closed columns is alternately loaded with uranium and then eluted. The resin adsorbs the complex anions, such as UC fSO 4-. in which the uranium is present in the leach solution. Ammonium nitrate is nsed for elution, obtained by recycling the uranium filtrate liquor after pH adjustment. Iron adsoibed with the uranium is eluted with it. Iron separation operation (8) is needed inasmuch as the iron hydroxide slurry is heavily contaminated with calcium sulfate and coprecipitated uranium salts. Therefore, the slurry is recycled to the watering stage (3). Washed solids from 1,6). the waste barren liquor from (7), and the uranium filtrate from (11) are combined. The pH is elevated to 7.5 by adding lime slurry before the mixture is pumped to the tailings disposal area. (Rio Algom Mines Limited, Toronto)...

When nitration has been completed the reaction mixture is transferred by compressed air to a cast iron separator with a capacity of 15 m3, where it is allowed to remain at rest for 6 hr to separate into two liquid phases. Then the spent acid is conveyed to a special cast iron tank, where it stays for a few days to recover the temainder of the MNT, which is collected from the surface and added to the toluene to be mononitrated. The spent acid, having a composition ... 

Separation. Separation of nitronaphthalene from spent acid is effected in a cast iron separator, heated by a steam jacket, which permits the temperature to be maintained at 50-55°C. The separation of the mixture into two layers requires 3 hr. Then the lower layer of the spent acid is drawn off to an intermediate tank of 10 m3 capacity and is allowed to cool. As a result, unreacted naphthalene collects at the surface as a crystalline mass. It is skimmed off mechanically. 

Another type of organometallic compound with relatively short iron-iron separations is obtained from the reaction of Fe2mes4 and Bu NC. The iron-iron distance drops from 2.61 A in Fe2mes4 to 2.371 A in [ r -C(mes)=NBu 2Fe2 /t-C-(mes)=NBu 2] 69 this is even shorter than the one found in metallic iron (2.48 A). However, recent theoretical calculations seem to indicate that direct metal to metal bonding70 is questionable in this type of molecule. 

ALUMINIUM — TIN — LEAD — CHROMIUM— MANGANESE -IRON —SEPARATION OF METALS. 

Between 1000° and 690°, within systems too poor in carbon to contain anything else than martenrite, new transformations are produced iron separates out in the pyre state this separa-... 

The first example shows the drastic shortening of the iron-iron separation that accompanies carbon monoxide loss. The Fe Fe separation decreases from 3.90 A in the reactant to 2.661(1) in the product.The product of reaction 11 has a Ni-Ni separation of only 2.508 A. The geometric details for the other compounds in these reactions are not known. The loss of carbon monoxide is reversible for the nickel complex. 

As the sand usually contains metallic elements such as flashes, pouring drops, pieces of sprue or even small parts of casting, all these have to be removed, at first by means of magnetic iron separators. If separation of the magnetic iron castings is not achieved or not possible, separation may be carried out by Eddy current separators. The residual sand lumps are then broken up. It is important not to cmsh the sand, in order to prevent the demixing of the sand and bentonite. 

V. Lakshmanan, N. Rathie and B. Monzyk, Evaluation of N-alkylhydroxamic Acids for Selective Iron Separation from Zinc Process Liquors for High Purity Iron Products , Iron Control and Disposal. J.E. Dutrizac and G.B. Harris, Eds., Canadian Institute of Mining, Metallurgy and Petroleum, Montreal, Canada, 1996, 357-367. 

Start up pump (centrifugal, cast iron) Separator (vertical vessel) ... 

In the quarrying and loading of raw materials it inevitably occurs that metallic foreign bodies - excavator bucket teeth, broken drill rods, drill bits, pieces of rail, chains, etc. — turn up in the feed material supplied to the primary crusher. If the crusher is fed direct by excavators or dump trucks, there is no opportunity of intercepting and removing such pieces of metal. Nor is it possible to remove them from the feed material flow the size of the rock fragments and the very considerable depth of the moving material (sometimes more than 1 m) rule out the use of tramp iron separators. 

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