Double reverse flotation process of middle-low grade phosphorite

Abstract

The invention relates to a double reverse flotation process of middle-low grade phosphorite. The double reverse flotation process is characterized by comprising the following steps of: after milling raw phosphorite ores to the granularity required by flotation, adding a reverse flotation de-magging adjustor and a catching agent for executing rough magnesium flotation operation, wherein de-maggingrough concentrate is in a rough magnesium flotation groove; after adding the regulator in rough magnesium flotation foam, executing magnesium recleaning operation, wherein de-magging middling productis in a magnesium recleaning groove and the magnesium recleaning foam is carbonate gangue; adding a de-silication disperser and a de-silication catching agent in ore slurry in the groove after de-magging, and carrying out de-silication rougher flotation operation I; then adding a de-silication catching agent and non-polar oil for performing the de-silication rougher flotation operation II, wherein ore concentrate is in a rough silicon flotation groove; after combining the foam of the silicon rougher flotation I and the silicon rougher flotation II, adding the de-silication catching agent for performing the silicon recleaning, wherein de-silication middling product is in a silicon recleaning groove, and silicon recleaning foam is silica gangue; and combining the de-silication middling product and the ore concentrate to obtain the comprehensive phosphorus concentrate. The process can increase the catching of the silicon gangue, improve the selecting efficiency and reduce the consumptionof the reverse flotation de-silication catching agent.

Description

technical field [0001] The invention relates to a flotation process for phosphorite, in particular to a double-reverse flotation process for medium and low-grade phosphorite. Background technique [0002] Phosphorite is an important non-renewable resource. Its application in agriculture is irreplaceable and non-renewable. Phosphorite needs to be processed by flotation to reduce the content of associated gangue minerals (such as quartz, chalcedony, clay, feldspar, mica, dolomite and calcite) to meet the requirements of phosphate rock for acid processing phosphate fertilizer. [0003] Phosphate resources in my country are characterized by ancient ore-forming ages, P-containing 2 o 5 Medium and low grade, silicon-calcium refractory sedimentary phosphorite ore is the main body. Flotation of this type of phosphate rock not only requires the removal of carbonate gangue minerals (mainly dolomite), but also requires the discharge of some silicate gangue minerals (mainly quartz, ...

AI Technical Summary

Problems solved by technology

In reverse flotation desilication, amine cationic collectors are sensitive to slime, RNH 3 + It is easy to adsorb the surface of slime particles, resulting in increased consumption of collectors, and often produces a large amount of viscous foam

The selectivity of amine collectors is relatively poor, and at the same time, it has foaming properties. If the amount is added too much, it will often deteriorate the flotation process and reduce the flotation separation efficiency.

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