Laboratory evaluation of Lisbon uranium ore /

The Lisbon Uranium Company of Salt Lake City, Utah produced a high grade uranium ore in April, 1958. The laboratory evaluation of Lisbon ore is presented in this report. This material will require blending with a high quality uranium concentrate such as South African because of its high nitric acid insoluble content and its low uranium assay. The material, when blended, meets all FMPC impurity tolerance limits except the limit for (Ca x SO₄⁻²). It is believed that this high impurity level will not hamper refinery operation, provided that the material is processed for only a short term. Laboratory digestion and extraction tests indicate that the blend should present no serious problems in pulse column operation, provided that the as-received Lisbon ore is milled."Feed Materials Production Center, National Lead Company of Ohio"--Cover."Contract No. AT(30-1)-1156.""Date of report: October 22, 1958 ; Date of issuance: January 20, 1959.""Technology--Feed materials (TID-4500, 14th Ed.).""NLCO-766."Includes bibliographical references (p. 17).The Lisbon Uranium Company of Salt Lake City, Utah produced a high grade uranium ore in April, 1958. The laboratory evaluation of Lisbon ore is presented in this report. This material will require blending with a high quality uranium concentrate such as South African because of its high nitric acid insoluble content and its low uranium assay. The material, when blended, meets all FMPC impurity tolerance limits except the limit for (Ca x SO₄⁻²). It is believed that this high impurity level will not hamper refinery operation, provided that the material is processed for only a short term. Laboratory digestion and extraction tests indicate that the blend should present no serious problems in pulse column operation, provided that the as-received Lisbon ore is milled.Mode of access: Internet