Production technology of high-grade molybdenum concentrate

Abstract

The invention discloses a production technology of high-grade molybdenum concentrate, which comprises the following steps: rough molybdenum concentrate is obtained by roughing crude molybdenum ore, the rough molybdenum concentrate is concentrated and removed reagent through a thickener, underflow enters a hydraulic swirler to be graded previously, overflow after the grading enters a primary flotation column to be selected, the underflow after the grading enters a horizontal ball grinding mill to be reground, and after the regrinding, the ore discharge enters the hydraulic swirler to be regraded; selected concentrate from the primary flotation column is cleaned by a vertical ore mill to enter a secondary and a tertiary flotation columns to be selected, and the selected concentrate from thetertiary flotation column directly enters or enters a quartic or a quintic flotation columns to be selected after being cleaned by a second section of the vertical ore mill to obtain the high-grade molybdenum concentrate; the selected tailings from the primary flotation column is tertiary scavenged by a flotation machine, and the scavenged concentrate tailings from the tertiary scavenging enters the next procedure. The technology adopts the flotation columns and the flotation machine, so the flow is short, the agent system is simple, the adaptability of the crude ore is strong, and the molybdenum concentration ratio is high, the molybdenum concentrate has high grade, large yield and high recycling rate so as to provide excellent raw material to the following molybdenum chemical engineering and further processing.

Description

technical field [0001] The invention relates to a production process of molybdenum concentrate, in particular to a production process of high-grade molybdenum concentrate. Background technique [0002] Molybdenite has good buoyancy, and the raw ore grade is generally low, so it can be used for smelting only after beneficiation treatment. At present, the grade of molybdenum concentrate produced by flotation method at home and abroad is mostly between 45-52%. The hydrometallurgical method commonly used abroad produces molybdenum concentrate with a product grade of more than 57%, which not only has high production costs, but also causes environmental pollution. A domestic processing plant adopts a deep flotation process, that is, "molybdenum coarse concentrate is selected through thirteen flotation machines, three-stage regrinding and classification, and two flotation machine sweeps; adding sodium thioglycolate, phosphorus Knox and Water glass three kinds of inhibitors can in...

AI Technical Summary

Problems solved by technology

Disadvantages of this technological process: First, it has high requirements on the nature and grade of raw ore, requiring good selectivity of raw ore and raw ore grade Mo≥0.145%; second, it can only partially produce molybdenum concentrate with molybdenum grade above 57%, and the yield is relatively low. At the same time, some low-grade molybdenum concentrates with a molybdenum grade of about 45% are produced. The low-grade molybdenum concentrates have fine particle size and are difficult to filter. There are many kinds of agents, especially the water glass is difficult to configure and add, and the dosage is large, which often blocks the pipeline

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