By International Atomic Energy Agency
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Additional info for Uranium Extraction Technology (Technical Reports (International Atomic Energy Agency))
When the strength of the ore is not adequate for safe working, top slicing methods are used. An artificial roof can be made by backfilling with a low cement content concrete or by forming a concrete slab. The thickness of the slab depends on the width of the slice, and the slab can be reinforced. Filling materials can also be added. Ore haulage (hoisting) to the surface in both sedimentary and in vein type mines is carried out by hoisting through a shaft equipped with a skip or on a decline equipped with a belt conveyor.
Acid consuming minerals i Alkaline leach i Solid-liquid separation a 3 s 1 Tn> Re_ e t c .. o Solvent extraction, U — • By-products 1 1 Drying/calcining I Product T Precipitation ' Precipitation Precipitation Drying/calcining Drying/calcining Drying/calcining Product Product 1 i r FIG. 1. Process options for treating various types of ores. tjj i J Product o r CHAPTER 3. PROCESSING CONCEPTS 37 Eluex process. There has not been much change from the strong base resins for ion exchange, although there continue to be developments in improved resins for resin-in-pulp applications.
The term 'speculative resources' is in use in nearly all the resource classification systems, except in the former USSR, where SR corresponds to the category P2. 4] refer to the cost of production, including mining and ore processing, the cost of associated environmental and waste management, as well as the cost related to future exploration and development of unexplored portions of the deposit. Not included are costs that have already been i O O I Decreasing confidence in estimates FIG. 2. NEA/IAEA classification scheme for uranium resources.
Uranium Extraction Technology (Technical Reports (International Atomic Energy Agency)) by International Atomic Energy Agency