ingot

(redirected from Lingot)
Also found in: Dictionary, Thesaurus, Financial.

ingot

a piece of cast metal obtained from a mould in a form suitable for storage, transporting, and further use

Ingot

 

a cast metal blank intended for further processing by some method of plastic deformation (rolling, forging, or extrusion), by remelting (molding or alloying), or by electrolysis (in which the anodes are of blister copper or nickel). Ingots are obtained by pouring molten metal into molds with comparatively simple shapes, by continuous casting, and by filling water-cooled crystallizers (electroslag remelting and remelting in arc vacuum furnaces).

Ingots cast in molds and intended for subsequent pressure shaping usually have the form of a truncated pyramid or truncated cone. If a metal crystallizes with a shrinkage, as is the case with killed steel, the ingot will contain a head, which usually contains a contraction cavity. During subsequent conversion, the head is cut off and routed for remelting. Rimmed steel solidifies without forming a contraction cavity, and the ingots thus do not have a head.

Ingots cast by continuous casting methods have the shape of a prism with a square, rectangular, or polygonal cross section or the shape of a cylinder. Ingots are sometimes cast in more complex shapes, for example, hollow shapes. A comparatively small contraction cavity is located in the upper part of continuously cast ingots. This part is separated when the blanks are cut to measured lengths. In ingots obtained by electroslag and arc vacuum remelting, the contraction cavity is much smaller. This is caused by the lowering of the filling speed during the final stage of ingot formation.

The weight of ingots destined for pressure shaping ranges from several kilograms to more than 250 tons. The most widely used ingots weigh 0.5 to 20 tons.

Pig iron ingots and ingots of certain nonferrous metals destined for remelting are usually in the shape of small, strongly tapered, truncated pyramids called pigs, whose weight, as a rule, does not exceed 30–40 kg. Other ingot shapes include bars (copper) and billets of various shapes.

Since the conditions for crystallization of a metal change substantially during solidification, the structure and chemical composition of ingots are nonhomogeneous. The larger the ingot, the more pronounced is the chemical and structural nonho-mogeneity. Ingots obtained by continuous casting or by filling a crystallizer are much more homogeneous than ingots cast in molds.

REFERENCES

Metallurgiia stali. Edited by V. I. Iavoiskii and G. N. Oiks. Moscow, 1973.
Kurdiumov, A. V., M. V. Pikunov, and V. M. Chursin. Liteinoe proizvodstvo tsvetnykh i redkikh metallov. Moscow, 1972.

A. IA. STOMAKHIN

ingot

[′iŋ·gət]
(metallurgy)
A solid metal casting suitable for remelting or working.
A bar of gold or silver.

ingot

A mass of molten metal which has been poured into a mold to solidify; it differs from a casting in that it requires rolling or forging to become a finished or semifinished product.
References in periodicals archive ?
Durant les operations de coulee de l'aluminium, entre le moment ou le metal sort des cuves d'electrolyse (ou des fours de refonte) et celui ou l'alliage est refroidi en lingots de formes appropriees, trois parametres font l'objet d'une attention particuliere, soit: A) la composition chimique de l'alliage (et, en particulier, la teneur en elements alcalins, tels le lithium et le sodium); B) la tenuer en inclusions non metalliques; C) la tenuer en hydrogene dissous.
Les achats francais sont toujours tres inferieurs a ceux des Anglais ou des Americains qui envoient regulierement leurs navires de guerre charger des lingots sur la cote pacifique.
1975): "Les lingots d'etain de l'epave Port-Vendres II", Gallia, 33, pp.
Elle produit 36% de sucre en pains, en lingots ou en granule de la production nationale.
31 Mississippi Mud Bars and Peppermint Patties 32 Gianduja or Smooth & Creamy Lingots Noisettes and Chocolate Dipped Cherries
000 tonnes de zinc en lingots, d'acide sulfurique et de cuivre cathode, ne cesse de defrayer la chronique.
beaucoup moins que]Il est a signaler que, dans le cadre d'une gestion dynamique des reserves de change dont font partie les avoirs en lingots d'or, le stock des lingots deposes aupres de la Banque d'Angleterre, a fait l'objet, en 2016, d'operations de placements aupres de banques internationales.
En 2016, ce sont presque 46 kilos d'or divers, en lingots ou en bijoux dont certains avec moult pierres precieuses, qui ont ete saisis.
En raison de la hausse de la demande de bijoux en or et de lingots, la consommation d'or du pays a atteint 986 tonnes en 2015, soit une croissance de 3,7%, faisant de la Chine le premier consommateur d'or au monde.
Les unites de la garde douaniere ont saisi, lundi apres midi, dans un entrepot a El Fejja (gouvernorat de la Manouba), des quantites importantes de cuivre de contrebande sous forme de lingots, a annonce la direction generale de la Douane.
La douane a en effet saisi au cours des cinq dernieres annees pas moins de presque 405 kilos d'or, soit en lingots ou en bijoux divers.