precious metal
Gold extraction by amalgamation method
The mercury amalgamation process has been around since ancient times to extract gold from ore. In its early form, it was used to treat powdered sulfur gold ores. During the 19th century, mercury amalgamation gained wider popularity as a gold recovery method. Since then, it has been used for variou......
1031 
Kelsey
Silver extraction by amalgamation
Mercury Amalgamation Method for Silver Extraction
Silver is an important precious metal whose extraction from natural sources is an integral part of the mining industry. In recent years, technology has improved considerably in the extraction of silver, resulting in more efficient and less costly ......
Silver paste
Silver Chloride
Silver Chloride (AgCl) is a white crystalline solid, first synthesized and discovered by German chemist and pharmacist, Christian Friedrich Schönbein, in 1831. Silver Chloride is composed of equal molar parts of silver and chlorine and is commonly used as a chemical agent in medi......
Platinum group metal regeneration
Platinum Group Metals Reclamation
The platinum group metals (PGMs) are a collection of six metals that have very similar physical and chemical properties—platinum, palladium, rhodium, iridium, osmium and ruthenium. PGMs are highly valued due to their strength and resistance to corrosion, and the......
platinum alloy
Platinum Alloy
Platinum is a type of metal that is highly valued due to its rarity and its strength. In fact, it is so strong that many items that are made from platinum are considered indestructible. As a result, it has often been used for items such as jewellery and coins that require a signific......
palladium alloy
Palladium alloy is a metal alloy that is composed primarily of palladium and other metals such as silver, gold, platinum, nickel and copper. It is used in a variety of industrial applications and has several benefits over other metals, including its low melting point, high thermal and electrical c......
seawater gold
The process of extracting gold from seawater has been going on for centuries. In times past, it was done by collecting gold dust from the beach and in more recent times it was done by special machines designed specifically for extracting gold from seawater. Now, a new method has been developed th......
Enrichment of platinum group metals by pressure leaching
Abstract
The enrichment of platinum group metals (PGMs) from low-grade ores needs a new and efficient technique to separate PGMs from other metals. High-pressure leaching (HPL) is a potential method for PGM extraction because it uses high pressure, temperature and chemical environment to leach ou......
Chlorine Selective Leaching for Enrichment of Platinum Group Metals
Abstract
Chlorine gas is a commonly used reagent in the extraction of many precious metals, such as platinum group metals (PGMs). This paper reviews the existing literature on the application of chlorine gas in the extraction of PGMs. Hydrometallurgical processes coupled with chlorine leaching ar......
Gold extraction by thiourea method
Cyanidation method is a commonly used gold extraction method for ore containing low content of gold. Generally, leaching is needed to extract gold. Heap leaching technology is suitable for low-grade ore containing gold. The ore is piled up in small heaps and is sprayed with a dilute solution conta......
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