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LoginRoasting and calcination is an important pyrometallurgical process using superheated gas to either oxidize or decompose valuable minerals (or salts) into a leachable or water-soluble form for downstream extraction. The application of roasting and calcination in the oxidation of sulphides has been used for centuries, but in recent times with the processing of energy metals it is becoming more important than ever. ALS has an extensive range of roasting and calcination capabilities, primarily at benchscale level and can incorporate roasting and calcination seamlessly into a complex hydrometallurgical program.
Roasting and calcination essentially revolves around the available furnaces and gas delivery mechanisms to control the atmosphere at temperature. ALS's benchscale furnaces include the following:
Common roasting and calcining applications are:
Note that ALS has strong alliances with local furnace manufacturers and can have bespoke furnaces fabricated to suit a specific roasting application.
Also, in cases where international kiln vendors have been engaged, ALS will happily organise the dispatch of testwork products (i.e. roast/calcination feed) to external vendors and receive calcine product back for further testing.
Hydrometallurgical testwork is always complex, and so we are happy to help walk you through the process, or meet your requirements exactly.
Please contact us for further details.
Generally, no. Insurance and safety protocols typically prevent renting laboratory space and this is not part of ALS’s business model. Clients are able to visit and witness testwork but this is to observe only! Typically, clients may attend on 24/7 piloting campaigns and interact with senior staff members for Technical interactions.
Yes, Vendors and SX reagent suppliers often attend during specific bench and pilot scale testwork periods to conduct offline tests.
Yes, clients are always welcome to visit our facilities and observe samples or tests in progress. Inductions are required and other rules may apply to visitors.
Yes, if a testwork program is in progress, ALS will happily dispatch testwork products and feed samples to vendors, third party laboratories, and customers as required. Fees apply.
Yes, for fluid bed roasting. However, at this stage pilot calcinators (Kilns) are limited to small scale due to the expense and infrastructure required and samples are usually dispatched to the USA for treatment. ALS would be amenable to a capital share partnership with local clients wanting to establish a larger scale pilot kiln capability.
No, as it is not our core business and would put us in direct competition with many of our clients. We can, however, put you in contact with a range of reputable engineering providers and consultants.
Roasting and calcination never happens in isolation and typically many other processes are inter-related, such as leaching, CCD, filtration, recycles, impurity removal, purification etc.
Click on the above links or contact us for further information. We can integrate a full program for you if required.
