Combined use method of iron ore anion reverse flotation desulfurizing and silicon reducing agent

Abstract

The invention discloses a combined use method of an iron ore anion reverse flotation desulfurizing and silicon reducing agent, which comprises the following steps: obtaining iron ore rough concentrates through magnetic selection or magnetogravity combined selection of iron ores achieving base unit dissociation through fine grinding, and adopting anion reverse flotation for the desulfurization andsilicon reduction of the obtained rough concentrates, wherein the agent comprises the components in the following types and dosages (computed according to the flotation feeding dry basis): 80-100g / t of ethyl xanthate, 950-1150g / t of NaOH, 450-600g / t of starch, 320-420g / t of CaO and 600-750g / t of anion reverse flotation collector. The method can remove sulfur as a detrimental impurity in the iron ore concentrates while extracting iron and reducing silicon of the iron ores without considering the influence of numerous foams generated by an oil foamer on an iron separation process, lowers the medicament cost, simplifies the process flow, is easy to implement in production, can be widely used for the iron increase, desulfurization and silicon reduction of magnetite separation plants and hematite separation plants, and can also be used for the desulfurizing and silicon reducing flotation of limonite, martite and semi-martite.

Description

technical field [0001] The invention relates to a combined application of iron ore reverse flotation reagents, in particular to a combined use method of iron ore anion reverse flotation desulfurization and silicon reduction reagents, which can be widely used in magnetite dressing plants and hematite dressing plants It can also be used for desulfurization and silicon reduction flotation of limonite, pseudohematite and semi-pseudohematite. Background technique [0002] Both anion reverse flotation and cationic reverse flotation can be used to extract iron and reduce silicon from iron ore. At present, anion reverse flotation is widely used in industry, and the technology is relatively mature. Single iron ore flotation sulfur reduction is also relatively easy to separate under the existing technical equipment. For example, Chinese patent ZL01117501 discloses a combined method of using iron ore anion reverse flotation reagents. It is to adjust the iron ore that has been finely g...

AI Technical Summary

Problems solved by technology

There are two ways to separate iron minerals from sulfur minerals. One is to select sulfur minerals before selecting iron minerals. However, due to the strong foaming performance of 2# oil, the agent itself has a longer action time, and remains in the The reagents in the pulp will affect the subsequent flotation silicon separation operation. In the actual production on site, there are more foams returned from the middling ore and it is difficult to defoam. With the continuous return of the middling ore, the foam floating on the surface of the pulp is not easy to eliminate. The amount of foam in the roughing operation will increase, the selectivity of the agent will deteriorate, the sorting process will be affected, and finally the grade of iron concentrate will be affected.

The second is to select iron minerals first and then select sulfur minerals. Since the starch added in the process of iron selection has an inhibitory effect on pyrite, it is difficult to remove sulfur in iron concentrates.