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Method for separating and recovering ilmenite, columbite and cassiterite

A technology for separation and recovery of ilmenite, which is applied in the field of cassiterite, niobite, and ilmenite separation and recovery, to achieve the effect of improving the recovery rate of TiO2, improving the purity and improving the recovery rate

Pending Publication Date: 2022-03-25
郑州中科新兴产业技术研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a method for separating and recovering ilmenite, niobite, and cassiterite. On the one hand, the present invention solves the problem of purification and recovery of mixed iron oxide ilmenite, and on the other hand , for TiO 2 Raw materials with a grade not higher than 5% or even lower can effectively improve the TiO in the whole process 2 Recovery rate

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  • Method for separating and recovering ilmenite, columbite and cassiterite

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Embodiment 1

[0041] Raw ore TiO in this embodiment 2 Grade 4.71%, tin grade 2.97%, Nb 2 o 5 The grade is 5.72%, and the main gangue minerals are phlogopite, apatite, stevensite and albite.

[0042] A method for separating and recovering ilmenite, niobite, and cassiterite, comprising the steps of:

[0043] (1) Mixed sorting: the raw ore particle size +0.125mm is directly thrown at the tail, and the particle size is -0.125mm for further centrifugal gravity separation; during gravity separation, the ore concentration is 5%, the ore feeding speed is 3.00L / min, and the rinse water volume is 3.15 L / min, rinsing time 1min, centrifugal speed 700rpm; gravity separation tailings are thrown directly, gravity concentration ore is ground by a ball mill until the particle size is -0.074mm and the content accounts for 90.71%, and then enters the flotation section; the flotation process is 1 1st roughing, 1 sweeping, 3 selections, the pH value of the roughing slurry is 8.0, 500g of activator lead nitra...

Embodiment 2

[0048] Raw ore TiO in this embodiment 2 Grade 4.71%, tin grade 2.97%, Nb 2 o 5 The grade is 5.72%, and the main gangue minerals are phlogopite, apatite, stevensite and albite.

[0049] A method for separating and recovering ilmenite, niobite, and cassiterite, comprising the steps of:

[0050] (1) Mixed sorting: the raw ore particle size +0.15mm is directly thrown at the tail, and the particle size -0.15mm is further centrifugally re-selected; during re-selection, the ore concentration is 4%, the ore feeding speed is 2.5L / min, and the rinse water volume is 2.15 L / min, rinsing time 0, centrifugal speed 600rpm; gravity separation tailings are thrown directly, gravity concentration ore is ground by a ball mill until the particle size is -0.074mm and the content accounts for 93.86%, and then enters the flotation section; the flotation process is 1 Second roughing 1 time sweeping 3 times selection, roughing slurry pH value is 6.5, 300g of activator lead nitrate is added per ton o...

Embodiment 3

[0055] Raw ore TiO in this embodiment 2 Grade 4.71%, tin grade 2.97%, Nb 2 o 5 The grade is 5.72%, and the main gangue minerals are phlogopite, apatite, stevensite and albite.

[0056] A method for separating and recovering ilmenite, niobite, and cassiterite, comprising the steps of:

[0057] (1) Mixed sorting: the raw ore particle size +0.125mm is directly thrown at the tail, and the particle size is -0.125mm for further centrifugal gravity separation; during gravity separation, the ore feeding concentration is 8%, the ore feeding speed is 3.75L / min, and the rinsing water volume is 3.15 L / min, rinsing time 2min, centrifugal speed 700rpm; gravity separation tailings are thrown directly, gravity concentration ore is ground by a ball mill until the particle size is -0.074mm and the content accounts for 95.21%, and then enters the flotation section; the flotation process is 1 Secondary roughing, 1 sweeping and 2 fine selections, the pH value of the roughing slurry is 7.0, 800g...

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Abstract

The invention discloses a method for separating and recovering ilmenite, columbite and cassiterite, and belongs to the technical field of mineral separation. The method comprises the following steps: (1) mixing and grading: obtaining bulk concentrate of ilmenite, columbite and cassiterite through a process of screening and grading, centrifugal gravity separation, ore grinding, flotation and shaking table gravity separation; and (2) separating and sorting: separating and sorting ilmenite, columbite and cassiterite through processes of high-gradient magnetic separation, electric separation and strong magnetic separation. For the raw ore with the TiO2 grade not higher than 5% or even lower, the method provided by the invention can effectively improve the TiO2 grade and the recovery rate of the whole technological process, and ilmenite concentrate, columbiobite concentrate and tin concentrate obtained by mixing grading and separation grading of the raw ore are high in grade and recovery rate.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a method for separating and recovering ilmenite, niobite and cassiterite. Background technique [0002] my country is rich in titanium ore resources, but more than 90% are symbiotic rock ores. Ilmenite is a mineral that contains both iron and titanium. Low-grade ilmenite TiO 2 The grade is around 4% or even lower, most of the embedded particles are fine, the mineral composition of the ore is complex, the clay content is high, and there are even problems of gangue minerals or iron element dissemination of ilmenite. Such minerals come from primary ore on the one hand, and low-grade ore reserves are larger and more widely distributed than higher-grade ilmenite, and on the other hand, come from the tailings of the concentrator. At present, the commonly used combined separation processes for ilmenite separation are: 1. Combined gravity separation-magnetic sep...

Claims

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Application Information

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IPC IPC(8): B03B9/00B03C1/025B03D1/00B03B5/32B03B5/04
CPCB03B9/00B03C1/025B03D1/00B03B5/32B03B5/04
Inventor 赵俊利李永利郭强朱顺伟李会林张灵
Owner 郑州中科新兴产业技术研究院