Question

I want a report About SILVER using the following criteria: Relevance of Topic, Price fluctuation of the selected metal or value added product, Mineralogy of feed, Global/ local occurrence of feed (resource), Flowsheet, Process description, Product quality/purity/applications

Answer 1

Solution:

Silver is a metal with many special importance such as:

• It is used in jewelries as it had an appealing appearance, easily worked, easily cleaned when tarnished, long lasting.
• Silver and silver alloys are used as money as silver coins.
• It also has electrical properties. Its resistance to corrosion and excellent ability to conduct electricity provides a basis for use as electrical contacts where contact resistance is minimized.

The price of silver fluctuates every year. Here is an annual data of silver prices:

Year	Average closing price	Year open	Year High	Year low	Year close
2019	$15.47	$15.65	$17.28	$14.32	$17.04
2018	$15.71	$17.21	$17.62	$13.98	$15.52
2017	$17.07	$16.41	$18.51	$15.43	$17.13
2016	$17.17	$13.84	$20.70	$13.75	$15.99
2015	$15.66	$15.71	$18.23	$13.70	$13.80

Silver usually occurs in association with other metal ores, especially those of lead. Peru and Mexico have been mining silver since 1546 and are still major world producers. Other countries where silver comes from are USA, Canada, and Bolivia.

Silver is extracted from the ore - argentite (Ag2S). The extraction process of silver is called as cyanide process as sodium cyanide solution is used. The ore is crushed, concentrated and then treated with sodium cyanide solution. This reaction forms sodium argento cyanide.

The solution of sodium argento cyanide combines with zinc dust and forms sodium tetra cyanozicate and precipitated silver. This precipitated silver is called spongy silver. This spongy silver is fused with potassium nitrate to obtain pure silver. The silver obtained then is purified by electrolytic process.