Suspension magnetizing roasting cyanide breakage-weak magnetic separation iron extraction device for high-iron cyanide tailings

Abstract

The invention discloses a suspension magnetizing roasting cyanide breakage-weak magnetic separation iron extraction device for high-iron cyanide tailings. A venturi dryer, two cyclone preheaters and apre-oxidation suspension roasting furnace communicate with one another in series. The pre-oxidation suspension roasting furnace comprises a combustor and air inlets. The upper portion of the pre-oxidation suspension roasting furnace communicates with a heat separation cyclone barrel through a pipeline, the heat separation cyclone barrel, a first flow sealing valve and a suspension reducing roasting furnace communicate with one another in series, and the suspension reducing roasting furnace communicates with a coal gas source and a nitrogen source. A discharging outlet of the suspension reducing roasting furnace, a second flow sealing valve, a first cooling cyclone barrel, a second cooling cyclone barrel, a third cooling cyclone barrel and a collecting bin communicate with one another in series. An outlet of the collecting bin cooperates with an inlet of a first-stage ore grinding machine, and the first-stage ore grinding machine, a first-stage weak magnetic separation machine, a second-stage ore grinding machine and a second-stage weak magnetic separation machine cooperate with each other in sequence. An air outlet of the first cyclone preheater communicates with a dust collectorand an induced draft fan in series. The suspension magnetizing roasting cyanide breakage-weak magnetic separation iron extraction device for the high-iron cyanide tailings has the advantages of beinghigh in heat transfer and mass transfer efficiency, thorough in cyanide decomposition, high in processing capacity and high in adaptability, being suitable for large-scale industrial production and the like.

Description

technical field

[0001] The invention belongs to the technical field of mineral processing, and in particular relates to a suspension magnetization roasting cyanide breaking-weak magnetic separation and iron extraction device for high ferricyanide tailings. Background technique

[0002] High ferricyanide tailings are hazardous wastes discharged from gold concentrate after cyanidation operation. The tailings contain harmful components such as cyanide and heavy metal components; It reaches 30-40%, and contains a small amount of gold and other valuable metals; long-term storage of such hazardous waste not only occupies land, pollutes the environment, but also wastes resources; The new technology can not only solve the serious environmental pollution problem caused by its large stockpiling, but also form iron ore resources.

[0003] Patent CN201610846576.9 discloses a method for synchronous and harmless recovery of gold, silver and iron from roasted cyanidation tailings. It prop...

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