Combined beneficiation method for medium-low-grade high-silicon phosphorite

Abstract

The invention discloses a combined beneficiation method for medium-low-grade high-silicon phosphorite. The combined beneficiation methodcomprises the steps that raw ore is crushed and graded, grading screen holes are A, oversize products enter a first photoelectric beneficiation machine to be subjected to photoelectric beneficiation, and photoelectric beneficiation phosphate concentrate and photoelectric beneficiation phosphate tailings are obtained through separation; after the photoelectric concentration phosphate concentrate and the undersize product are combined and enter a mill for ore grinding, ore pulp meeting the flotation required granularity enters a flotation machine for flotation operation, and final phosphate concentrate and phosphate tailings are obtained; and the photoelectric phosphorus separation tailings are conveyed to a second photoelectric separator for photoelectric separation, and concentrate silica and tailings are obtained through separation. According to the method, a three-section separation operation process is adopted, gangue minerals with high silicate content are separated in advance through photoelectric separation, and the ore grinding and flotation operation amount is reduced. Gangue minerals separated from tailings through photoelectric separation can be effectively applied to other industries such as yellow phosphorus production and building materials. The purpose of improving the grade of phosphorite is achieved, the tailings are fully utilized, and the follow-up tailing treatment cost is reduced.

Description

technical field [0001] The invention relates to a phosphate rock beneficiation technology, in particular to a combined beneficiation method for medium and low-grade high-silicon phosphate rock. Background technique [0002] Although the total amount of phosphate rock resources in my country is dominant in the world, but the P 2 o 5 More than 30% of high-grade phosphate rocks are gradually depleted, and low- and medium-grade resources and reserves are increasingly scarce. According to the data, P 2 o 5 More than 30% of the high-grade phosphate rock accounts for about 70% in Guizhou, while Hubei, Sichuan and Yunnan only account for about 20%. At present, my country has identified 16.757 billion tons of phosphate rock resource reserves, of which more than 90% are medium and low-grade phosphate rock. Research and industrialization development of key technologies for the processing and utilization of medium and low-grade phosphate rock. [0003] At present, the technically...

AI Technical Summary

Problems solved by technology

Applicable to a variety of minerals, but the cost of chemicals is high, and a large amount of tailings and production wastewater are produced

Judging from the actual production situation at present, the selected grade P 2 o 5 More than 25%, the recovery rate is greater than 95%, and the selected grade is P 2 o 5 About 20%, the recovery rate is only about 80%