51. |
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52. |
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53. |
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54. |
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55. |
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56. |
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57. |
- Forssberg, Eric, et al.
(författare)
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Pilot plant trials of new gravity concentration equipment
- 1987
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Ingår i: Minerals & metallurgical processing. - 0747-9182. ; 4:2, s. 87-89
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Tidskriftsartikel (refereegranskat)abstract
- In this technical note, pilot-scale tests with two types of gravity concentrators, the Knelson separator and the Mark VIIA Reichert spiral concentrator are described. The experimental work was concentrated on the relatively untried Knelson separator. The materials tested have different concentration characteristics: one was an artificial ore with excellent liberation characteristics and a wide difference in density between valuable and gangue minerals; the others include a spiral concentrate containing gold from the gravity circuit of Boliden, Sweden, an old scheelite tailing from Yxsjoberg, Sweden, and an auriferous ore containing gold that had not been crushed to full liberation. The latter three materials contained other heavy minerals, e. g. pyrite, that can interfere with concentration.
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58. |
- Forssberg, Eric, et al.
(författare)
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Pulp chemistry measurements in sulphide mineral flotation
- 1987
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Ingår i: Erzmetall. - 0044-2658. ; 40:4, s. 189-195
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Tidskriftsartikel (refereegranskat)abstract
- This project involved flotation of copper-lead, zinc and pyrite concentrates from a complex sulphide ore. Pulp chemistry measurements were made for determination of sulphur anion, total sulphur, carbon dioxide, calcium and xanthate concentrations as well as chemical and biological oxygen demand, pH, redox potential, oxygen content and temperature. The relation of pulp chemistry to flotation result was studied.
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59. |
- Forssberg, Eric, et al.
(författare)
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Treatment of uranium extraction residues
- 1987
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Ingår i: Erzmetall. - 0044-2658. ; 40:7, s. 398-406
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Tidskriftsartikel (refereegranskat)abstract
- The report contains a brief review of the various unit processes for uranium extraction, particularly extraction in an acid environment. The properties and treatment of the residues are described in detail with reference to the uranium deposit at Lilljuthatten in the Swedish province of Jamtland. The results show that the tailings have good properties from an environmental standpoint. This is largely because the ore does not need to be ground to small particle sizes for leaching. The properties of the tailings can be further improved by stabilization with cement or pozzuolane.
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60. |
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