2007-07-24 05:24:49 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Enrichment of ores means increasing the metal (or non-metal) content of an ore by removing as much of the minerals in the ore that do not contain the desired substance. This can be done by several means including screening, gravity separation, magnetic separation and fine grinding followed by froth flotation; to concentrate the metal-rich minerals and discard the non metallic ones (gangue).
The purpose in concentrating the ore is to reduce the cost of smelting or other process that is used to separate the desired substance from the ore minerals (also reduces transport costs, etc).
Otherwise known as mineral dressing, mineral processing, mineral technology.
2007-07-24 05:41:15 · answer #1 · answered by AndrewG 7 · 0⤊ 1⤋
The term is used two ways, describing how the ore was emplaced, or after mining how it can be concentrated.
An ore body can be enriched by secondary processes. An ore body can be enriched by transport, eg., in placer deposits more gold can be laid down onto an already existing ore body. This happens underground too.
Leaching can concentrate ore, by dissolving minerals of no interest, carrying them out in solution and leaving behind the minerals and so concentrating them.
After mining ores there are many ways to concentrate different ores. Basically they all involve getting rid of the material that is not profitable. Often ore is enriched near a mine in order to make its transport to a smelter worthwhile.
2007-07-24 05:40:20 · answer #2 · answered by dougger 7 · 0⤊ 0⤋
It is whatever process that eliminates some part of the ore that does not contain the desired mineral (or minute concentration thereof). The result is that the enriched ore has thus a higher concentration of the valuable stuff, on the way to getting pure product.
2007-07-24 05:29:58 · answer #3 · answered by Vincent G 7 · 1⤊ 0⤋
Define Enrichment
2016-11-16 21:56:01 · answer #4 · answered by ? 4 · 0⤊ 0⤋
Ore enrichment factors (wt % metal in ore/wt % metal in source rock) are calculated from analyses of ore and source rocks, assuming that seawater-derived brines leached ore materials from underlying rocks and precipitated them at the point of brine discharge onto the seafloor. Cd, Zn, Cu, Au and Ag are most highly enriched, followed by Bi, Pb, Sn, As and Co. Mo, W, V, Cr, Mn and Ni are not enriched at Radiore...
2007-07-24 05:41:16 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Ore enrichment is just purifying the desired metals out of the "rock" ore.
In chemistry, fractional crystallization is a method of refining substances based on differences in solubility. If two or more substances are dissolved in a solvent, they will crystallize out of solution (precipitate) at different rates. Crystallization can be induced by changes in concentration, temperature or other means.
This technique is often used in chemical engineering to obtain very pure substances, or to recover sellable products from waste solutions.
commonly the ore is digested in acid and goes into solution. The desired or undesired components are precipitated out at differenct times by changes in temperature or addition of salts. By this means you can seperate or recover the desired components. (sometimes ore contains 2 or 3 things you may want)
2007-07-24 05:31:06 · answer #6 · answered by billgoats79 5 · 0⤊ 0⤋
Pure iron is stringer than iron with deposits of magnisium.
2007-07-24 05:27:55 · answer #7 · answered by raiderking69 5 · 0⤊ 1⤋