Novel separation process of multi-metal lean hematite

Abstract

The invention belongs to the technical field of mineral separation in the metallurgical industry, and in particular relates to a novel separation process of multi-metal lean hematite, which is characterized in that a separation method of two sections of continuous ore grinding, magnetic separation, reverse floatation, regrinding and centrifuging through a centrifugal machine is adopted so that iron minerals and other metal minerals are separated. The novel separation process comprises the following steps of: subjecting primary ball grinding, primary grading, secondary grading, secondary ball grinding, one-section weak magnetic separation, one-section strong magnetic separation, one-section strong magnetic fine separation, reverse floatation operation separation, two-section magnetic separation and regrinding to multi-metal symbiotic lean hematite ores; carrying out one-section rough separation, one-section fine separation, one-section scavenging and two-section scavenging; merging weak magnetic concentrate and secondary reverse floatation concentrate to form final concentrate; and merging two-section strong magnetic tailings and reverse floatation tailings to form final tailings. After the novel separation process is adopted for separation, raw ore grade is 30.505 percent, the concentrate obtained after the separation has better selection indexes such as a grade of 64.14 percent, a yield of 28.59 percent, a metal recovering rate of 60.13 percent, and a tailing grade of 17.03 percent. The grade of the concentrate can be improved from about 58 percent to 64.14 percent.

Description

technical field [0001] The invention belongs to the technical field of beneficiation in the metallurgical mining industry, and in particular relates to a new process of beneficiation of polymetallic poor hematite. Background technique [0002] Generally, the separation of poor hematite ore with polymetallic symbiosis generally adopts the process of "three-stage continuous grinding, weak magnetic-strong magnetic-reverse flotation" process in China, and the reverse flotation operation is carried out in a weakly alkaline medium. A combination of reagents is used to remove minerals such as niobite, niobium-iron rutile, yellow green stone and calcite, fluorite, sodium pyroxene, sodium amphibole, quartz, barite and phosphopyroxene to obtain iron concentrate. No, the concentrate grade can reach about 58-60%, the process is simple, and the sorting index is not very ideal. Contents of the invention [0003] The purpose of the present invention is to provide a new sorting process o...

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Problems solved by technology

[0002] Generally, the separation of poor hematite ore with polymetallic symbiosis generally adopts the process of "three-stage continuous grinding, weak magnetic-strong magnetic-reverse flotation" process in China, and the reverse flotation operation is carried out in a weakly alkaline medium. A combination of reagents is used to remove minerals such as niobite, niobium-iron rutile, yellow green stone and calcite, fluorite, sodium pyroxene, sodium amphibole, quartz, barite and phosphopyroxene to obtain iron concentrate. No, the concentrate grade can reach about 58-60%, the process is simple, and the selection index is not very ideal

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