Recleaning method of fine-grain embedded hematite flotation tailings
A technology for flotation tailings and fine particles, which is applied in the field of mine beneficiation engineering, can solve the problems of low metal recovery rate and high beneficiation cost, and achieve the effects of high metal recovery rate, reduced beneficiation cost and simple process flow
Active Publication Date: 2013-04-17
ANSTEEL GRP MINING CO LTD
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Problems solved by technology
The grade of re-concentrated ore is only about 58%, the yield is only about 5%, the metal recovery rate is very low, and the cost of beneficiation is high
Method used
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[0022] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.
[0023] Such as figure 1 As shown, the method for re-election of fine-grained and poor hematite flotation tailings of the present invention is characterized in that the fine-grained and poor hematite flotation tailings go through a section of weak magnetic → a section of strong magnetic → regrind → two First stage of weak magnetic field → second stage of strong magnetic field → anion reverse flotation separation, and then the grade of re-selected concentrate reaches 58-61% or more. The specific steps are as follows:
[0024] 1) Feed the flotation tailings with a grade of 18-23% and a particle size of -200 mesh with a weight percentage of 88% of fine-grained poor hematite into a weak magnetic field,
[0025] 2) A section of tailings with weak magnetic field is fed into a section of strong magnetic field,
[0026] 3) A section of strong mag...
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The invention relates to a recleaning method of fine-grain embedded hematite flotation tailings. The method is characterized by comprising the following steps of: feeding a one-stage weak magnetism to the fine-grain embedded hematite flotation tailings, feeding a one-stage strong magnetism to the one-stage weak magnetism tailings, mixing a one-stage strong magnetism concentrate with a one-stage weak magnetism concentrate into a one-stage mixed magnetism concentrate to feed to a regrinding operation, feeding the reground product to a two-stage weak magnetism, feeding a two-stage strong magnetism to the two-stage weak magnetism tailings, mixing a two-stage strong magnetism concentrate with a two-stage weak magnetism concentrate into a two-stage mixed magnetism concentrate to feed to the rough flotation, feeding the rough concentrate to the concentration, feeding the rough tailings to a one-stage scavenging, wherein the concentrated concentrate is the recleaning concentrate, returning the concentrated tailings to the rough flotation, returning the one-stage scavenged concentrate to the rough flotation, feeding the one-stage scavenged tailings to a two-stage scavenging, returning the two-stage scavenged concentrate to the one-stage scavenging, feeding the two-stage scavenged tailings to a three-stage scavenging, returning the three-stage scavenged concentrate to the two-stage scavenging, and mixing the one-stage strong magnetism tailings, the two-stage strong magnetism tailings and the floatation tailings into the recleaning tailings to be abandoned. The recleaning method is simple in process flow and high in metal recovery.
Description
technical field [0001] The invention relates to the technical field of mine beneficiation engineering, in particular to a method for re-selecting flotation tailings of fine-grained and poor hematite. Background technique [0002] The comprehensive tailings of the concentrator are composed of three parts: gravity tailings, strong magnetic tailings and flotation tailings. The metal loss in the tailings is mainly concentrated in the flotation tailings. At present, in the Anshan-type lean hematite production process, in order to reduce metal loss, the tailings are usually re-selected. In the comprehensive tailings re-election, the tailings are usually concentrated, and then the tailings are re-selected by using two-stage spiral chutes of "one-stage roughing and one-stage beneficiation". For the re-selection of fine-grained lean hematite tailings, the separation of "one section of strong magnetic and two sections of spiral chute" is generally adopted, that is, after the tail...
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IPC IPC(8): B03B9/06
CPCY02W30/52
Inventor 张丛香刘双安宋均利梅灿国钟刚
Owner ANSTEEL GRP MINING CO LTD