Mixed ore high pressure roll milling dual-media magnetic separation-hematite ore sorting process

A high-pressure roller mill and dual-media technology, which is applied to high-pressure roller mill and dual-media for mixed ore, can solve the problems of increasing the amount of ore in flotation operations, increasing the cost of grinding, and increasing flotation equipment, so as to reduce the consumption of flotation chemicals The effect of reducing the amount, reducing the cost of beneficiation, and simplifying the process structure

Inactive Publication Date: 2017-08-11
ANSTEEL GRP MINING CO LTD
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Problems solved by technology

[0003] The mixed ore adopts the process of "stage grinding, tower mill-weak magnetic field-strong magnetic field-reverse flotation". Part of the concentrate is magnetic ore; after a section of weak magnetic tailings is sorted by a section of strong magnetic machine, a section of strong magnetic concentrate is obtained, and a section of strong magnetic concentrate is hematite. The mixed concentrate is fed in

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  • Mixed ore high pressure roll milling dual-media magnetic separation-hematite ore sorting process
  • Mixed ore high pressure roll milling dual-media magnetic separation-hematite ore sorting process

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with drawings and embodiments.

[0018] like figure 2 Shown, a kind of mixed ore high pressure roller mill of the present invention, double medium, magnetic-red ore separation process is characterized in that comprising the following steps:

[0019] 1) The particle size of the raw ore is 300-0mm. After two stages of crushing and screening, the product particle size reaches -25mm and the content is more than 90%.

[0020] 2) Feed products with a particle size of -25mm and a content of more than 90% into the "high-pressure roller mill-wind classification system to obtain products with a particle size of -200 mesh of 60% to 65%;

[0021] 3) Feed products with a particle size of -200 mesh 60% to 65% into a section of magnetic weakening machine for sorting, and separate a section of weak magnetic concentrate and a section of weak magnetic tailings;

[0022] 4) A section of weak magnetic tailings is fed i...

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Abstract

The invention relates to a mixed ore high pressure roll milling dual-media magnetic separation-hematite ore sorting process. The process is characterized by comprising the following steps that raw ore is subject to coarse breaking and medium breaking two-section breaking and screening until the content of products with the granularity reaching -25 mm being 90% or above, then the material is fed into a high pressure roll milling-wind hierarchy system, and the content of products with the granularity being -200 meshes is 60%-65%; and the material is fed into a first-section low-intensity magnetic separator and a first-section high intensity magnetic separator for sorting, first-section low intensity magnetic separation concentrate and first-section high intensity magnetic ore are fed into a tower mill to be milled until the content of products with the granularity being -325 meshes is 90% or above, the products are fed into a second-section low-intensity magnetic separator, a third-section low-intensity magnetic separator, a first-section magnetic vibrating concentrator and an anion reverse flotation operation, concentrate with the grade being 67%-67.5% is obtained, and first-section high intensity magnetic separation tailing, second-section low intensity magnetic separation tailing, third-section low intensity magnetic separation tailing, second-section high intensity magnetic separation tailing and first-section magnetic vibrating concentrator tailing are combined into final tailing. According to the mixed ore high pressure roll milling dual-media magnetic-hematite ore grading process, fine breaking operation and two-section ore grinding operation are reduced, the fine screening operation is eliminated, the flow structure is simplified, and dual-media and short-flow grading is achieved, and the mineral separation cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of ore dressing, and in particular relates to a mixed ore high-pressure roller mill, dual-media, magnetic-red ore separation process. Background technique [0002] The mixed ore is the ore mixed with magnetite and hematite. The iron ore mixed ore is generally separated by the process of "stage grinding, tower mill-weak magnetic field-strong magnetic field-reverse flotation". After the raw ore undergoes a closed-circuit grinding formed by one-stage grinding and one-stage grading, the primary grading overflow particle size reaches -200 mesh and the content is 55-60%. Sorting, throwing away part of the coarse-grained qualified tailings; a section of weak magnetic concentrate and a section of strong magnetic concentrate form a section of mixed magnetic concentrate, which is fed into the secondary closed-circuit grinding composed of a secondary classifying cyclone and a tower mill. The secondary grading overflow...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03B9/00
CPCB03B7/00B03B9/00
Inventor 刘双安张丛香梅灿国钟刚徐连生
Owner ANSTEEL GRP MINING CO LTD
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