Tin, ore

Mining. Numerous patents have advocated the use of alkanolamines in mining appHcations. Triethanolarnine has been used as a depressent in the flotation of copper (164), in the electrotwinning of gold (165), and as an aid in the froth flotation of nickel ores. Phosphate ore flotation has been improved through the use of a fatty acid condensate with ethanolamine (166). Beneficiation of tin ore has been accompHshed using fatty acid alkanolamides (167). [Pg.11]

Tin ores and concentrates can be brought into solution by fusing at red heat in a nickel cmcible with sodium carbonate and sodium peroxide, leaching in water, acidifying with hydrochloric acid, and digesting with nickel sheet. The solution is cooled in carbon dioxide, and titrated with a standard potassium iodate—iodide solution using starch as an indicator. [Pg.60]

Zinn-erschwerung, /. (Textiles) tin weighting, -erz, n. tin ore, cassrterite. -erzseife, /. tin placer deposit, -farbe, /. (t)yeihg) tin-mordant color, -feilicht, n., -feilspdne, m.pl. tin filings, -flammofen, m. reverberatory tin furnace, -folie, /. tin foil. [Pg.531]

Carbon in the form of charcoal is a sufficiently powerful reducing agent to convert lead and tin ores to the free... [Pg.1519]

Shimizu and Shikazono (1987) studied the compositional relations of coexisting stannoidite, sphalerite and tennantite-tetrahedrite (Fig. 1.182). Based on these data they estimated the sulfur fugacity of stannoidite-bearing tin ore. Considering the complementary work on stannite-bearing tin ores from Japanese ore deposits (Shimizu and Shikazono, 1985), a comparison between environmental conditions of these two types of tin sulfides was made. Their study is described below. [Pg.244]

Tin (chemical symbol Sn, from the Latin name of the metal, stannum) occurs as a native metal only as small, rare nuggets it is very doubtful, therefore, whether native tin would have been noticed, never mind used, by ancient people. Nevertheless, tin was one of the earliest metals to have been produced. Tin ores occur in few places on the upper crust of the earth, mostly as the mineral cassiterite or tin stone (composed of tin oxide) from which most tin has been and still is extracted. Tin stone is a usually brown or black,... [Pg.208]

Beneficiation of tin ores exclusively includes a combination of gravity preconcentration and flotation, where the flotation includes (a) flotation of sulphides from the gravity concentrate and (b) flotation of sulphides from the fines, followed by tin flotation from the sulphide tailing after desliming. [Pg.87]

Based on studies [1] of a number of tin ore bodies, tin can be classified into three major... [Pg.87]

Coarse-grained tin ores. The average grain size of cassiterite in this ore type ranges from 0.1 to 1 mm and higher. [Pg.89]

The coarse-grained tin ores are usually represented by cassiterite-quartz and pegmatitic formations. These ores can be a complex formation containing varieties of gangue minerals. The pegmatitic ore type, in addition to tin, can contain significant amounts of tantalum and niobium. [Pg.89]

There are three main methods used for beneficiation of tin ores (a) physical concentration including gravity concentration, magnetic separation and electrostatic separation (b) flotation and (c) a combination of gravity preconcentration and flotation. [Pg.89]

Flotation is only employed for beneficiation of disseminated tin ores. [Pg.89]

The depressant of choice for cassiterite flotation depends very much on the type of gangue minerals present in the ore. Extensive research work has been carried out in which a number of depressants have been examined on tin ores containing different gangue minerals [12-14], A number of these depressants have been introduced into various operating plants around the world. [Pg.96]

Research work has shown that cassiterite from various deposits and often even from parts of the same deposit differ in chemical composition, colour, flotation properties, chemical activity and electrophysical characteristics. Therefore, the mineralogical composition of tin ores and the physiological properties of the minerals, in particular cassiterite, determine to a great extent the quantity of tin lost during gravity processing and especially during flotation. [Pg.98]

Polkin, S.I., Flotation of Rare Metal and Tin Ores, Gosgorte-khizdat, Vol. 637, pp. 77-82, 1971, (Russian text). [Pg.108]

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