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Sorting method of multi-metal lean hematite

A multi-metal and hematite technology, applied in chemical instruments and methods, flotation, wet separation, etc., can solve the problem of unsatisfactory selection indicators

Active Publication Date: 2011-11-02
ANSTEEL GRP MINING CO LTD
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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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Embodiment Construction

[0022] The specific implementation of the present invention will be described in detail below in conjunction with the examples.

[0023] Such as figure 1 Shown, the sorting method of polymetallic poor hematite of the present invention is characterized in that comprising the following steps:

[0024] 1) After the multi-metal symbiotic lean hematite ore undergoes a ball mill and a closed-circuit grinding formed by a classification, the overflow of the first classification is fed into the second classification,

[0025] 2) The sand settling of the secondary classification is fed into the secondary ball mill, and the ore discharge of the secondary ball mill is returned to the secondary classification for classification.

[0026] 3) The overflow of the secondary classification is fed into a section of weak magnetic separation,

[0027] 4) One stage of weak magnetic separation selects some magnetic iron minerals, and the tailings selected by one stage of weak magnetic separation u...

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Abstract

The invention belongs to the technical field of ore beneficiation in metallurgical mining industry, and particularly relates to a sorting method of multi-metal lean hematite. The sorting method is characterized by employing a two-stage continuous grinding, magnetic separation, reverse flotation, grinding aging and centrifuge sorting method to separate the iron minerals and other metallic minerals, and comprises the following steps of: carrying out ball milling for the first time and classification for the first time, classification for the second time, ball milling for the second time, first-stage weak magnetic separation, first-stage strong magnetic roughing, first-stage strong magnetic selection, reverse flotation sorting, second-stage magnetic separation, grinding again, centrifuge roughing and centrifuge selection on the multi-metal symbiotic lean hematite, combining the weak magnetic separation concentrate and centrifuge concentrate to obtain final concentrate, and combining second-stage strong magnetic separation tailings, reverse flotation tailings and centrifuge tailings to obtain final tailings. After the introduction of the novel new sorting method, the grade of the raw ore is 30.505%, the grade of the obtained concentrate increases to 64.14% from about 58% and the yield is 28.59%, the recovery rate is 60.13%, and the grade of the tailings is 17.03%.

Description

technical field [0001] The invention belongs to the technical field of beneficiation in the metallurgical mining industry, in particular to a method for beneficiating 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 sorting method of polymetallic poor hema...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B1/00B03D1/00B03D1/018
Inventor 张丛香刘双安宋均利梅灿国
Owner ANSTEEL GRP MINING CO LTD
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