Floatation method of pyrites

Abstract

The invention provides a floatation method of pyrites, belonging to the field of floatation technologies. The floatation method is characterized by comprising the following steps: adding ammonium saltand sulfide as activating agents under the condition of alkaline ore pulp after the floatation of nonferrous metal sulphide ore, then adding collector xanthate and foaming agent pine oil, and stirring to float the pyrites. In the floatation process, the addition amount of the activating agent is 6-120mol/t raw ore, the addition amount of the activating agent sulfide is 6-36mol/t raw ore, the addition amount of the collector xanthate is 500g/t raw ore, and the addition amount of the foaming agent pine oil is 50g/t raw ore. The method can improve the surface properties and the floatation conditions of the pyrites, accelerate the upward-floating speed of the pyrites, improve the recovery rate and the concentrate grade of the pyrites and reduce the flotation agent consumption and the production cost.

Description

technical field [0001] The invention relates to a flotation method for iron sulfide ore, and belongs to the technical field of mineral processing. Background technique [0002] At present, after flotation of non-ferrous metal sulfide ore, iron sulfide ore is floated. Generally, sulfuric acid is used as activator, xanthate is used as collector, pine oil is used as foaming agent, and iron sulfide ore is floated after stirring. This conventional method of flotation iron sulfide ore has many defects in actual production: the concentrated sulfuric acid used is a dangerous chemical, which is inconvenient to transport, manage and use, and has a large amount, high cost, and is easy to corrode the mineral processing equipment; Water is acidic, which easily dissolves acid-soluble minerals, causing heavy metal ions such as iron, copper, manganese, zinc, and cadmium in tailings water to exceed the standard; the acidic sulfur separation method has a long process and high energy consumpti...

AI Technical Summary

Problems solved by technology

This conventional method of flotation iron sulfide ore has many defects in actual production: the concentrated sulfuric acid used is a dangerous chemical, which is inconvenient to transport, manage and use, and has a large amount, high cost, and is easy to corrode the mineral processing equipment; Water is acidic, which easily dissolves acid-soluble minerals, causing heavy metal ions such as iron, copper, manganese, zinc, and cadmium in tailings water to exceed the standard; the acidic sulfur separation method has a long process and high energy consumption. When alkaline substances, oxides and carbonates are used, the consumption of sulfuric acid is extremely high, and the production cost of the enterprise is high and the benefit is low

There are literature reports that copper sulfate, soda ash, and a single ammonium salt are used as activators for iron sulfide ore selection, but there are disadvantages such as unsatisfactory activation effect, low recovery rate, large dosage of medicament, high cost, unstable production, and difficult control of production operation. , so the actual production index is not ideal

Simply using sodium sulfide to activate and induce flotation, the amount of sodium sulfide used is too large, the floating speed is slow, it is difficult to adapt to the changes in the properties of various raw ores, the recovery rate is low, and it is unstable.

The flotation operation has poor adaptability due to the change of flotation conditions, and the promotion value is not great