This website is available in:
To change websites, find a country in the A - Z list then choose a language.
To change websites, click on the map pins to find a country then choose a language.
HomeMiningMetallurgy & Process DesignUnit Operations & MetallurgyPressure & Ambient Leaching
SGS metallurgists are experienced in options for gold leaching, nickel laterite leaching and uranium leaching along with options for other base metals and refractory ores. Our reputation as a provider of bankable flowsheets and testing provides confidence that the metal recovery rates in your full sized plant are optimized.
We have the expertise and the equipment inventory to understand complex orebodies and develop a recovery system that is efficient, safe and cost-effective. SGS leaching services include:
When choosing a leaching procedure, our experts take many factors into consideration. These factors include the type of metal being recovered, the mineralogy of the ore, grain size, and characteristics of encapsulation; whether the ore is refractory; and the presence of complicating minerals such as chalocopyrite. We also take expected recovery rates and cost restraints into account. Based on these considerations, SGS teams conduct testing of one or more of the technologies that we offer.
Pressure leaching, high pressure leaching and pressure oxidation are conducted in an autoclave at carefully controlled temperatures and pressures. These technologies involve a large capital investment and higher operating costs, but yield high recovery rates from difficult, complex or refractory ores. Advantages and limitations include:
Ambient leaching, including bulk leaching, is conducted in simple heaps, vats or columns. The procedures are conducted at ambient temperatures and pressures. Advantages to these systems include simpler chemistry and operating procedures, and lower initial and ongoing costs. Ambient leaching is suitable for simple ores or those with lower expected recovery rates. SGS ambient leaching systems include:
SGS also conducts sequential leaching, a diagnostic tool for hydrometallurgical processes:
Choosing the most appropriate leaching technology has a major impact on your construction and operating costs and eventual recovery rates. SGS works with you to ensure that your decision optimizes the recovery operation and improves your bottom line.