Beneficiation method of vanadium-titanium magnetite concentrate

A technology of vanadium-titanium magnetite concentrate and beneficiation method, which is applied in chemical instruments and methods, wet separation, solid separation and other directions, can solve the problems of high cost, difficult to effectively remove titanium in the crystal lattice, complicated process, etc. The effect of improving flotation performance, maintaining activity stability, and improving cleavage activity

Active Publication Date: 2021-10-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the long-term research, people gradually believe that titanium exists in the magnetite lattice with the same quality and image and forms iron-titanium solid solution. It is difficult to effectively remove titanium from the lattice by traditional mineral processing technology.
Therefore, the usual research direction of existing methods is to separate iron and titanium by reduction methods. This method is costly, complicated, and may cause environmental problems.

Method used

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  • Beneficiation method of vanadium-titanium magnetite concentrate
  • Beneficiation method of vanadium-titanium magnetite concentrate
  • Beneficiation method of vanadium-titanium magnetite concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Fe grade 54.61%, TiO 2 The vanadium-titanium magnetite concentrate I with a grade of 14.42% was tested.

[0050] Mix the vanadium-titanium magnetite I with 0.1M sodium hexametaphosphate aqueous solution to make a slurry with a concentration of 40%, and then spray it into the grinding equipment under 20MPa high pressure for grinding, and the grinding particle size is below 5 microns. The proportion accounts for more than 95%. The fine ore after grinding enters the magnetic separation process for magnetic separation, and the magnetic field strength is 0.8T. Obtain vanadium-titanium magnetite concentrate II and titanium-rich titanium rough ore; the Fe grade of vanadium-titanium magnetite concentrate II is 63.25%, and the recovery rate is 86.34%;

[0051] Pretreatment and flotation of titanium-rich titanium ore:

[0052] Disperse titanium-rich coarse titanium ore in a solution containing collector (styrene phosphoric acid; 2000g / t) to obtain pulp 2; spray pulp 2, and flo...

Embodiment 2

[0054] In order to explore the effect of ultra-fine grinding particle size on the separation efficiency of iron and titanium, we take the grade of Fe obtained after process separation as 54.53% and TiO 2 The grade of 15.34% iron concentrate I is mixed with 0.1M sodium hexametaphosphate aqueous solution to make a slurry with a concentration of 40%, and then sprayed into the grinding equipment under 20MPa high pressure for grinding, and the grinding particle size is variable. The products after grinding are screened into five different particle size groups (see Table 1), and then enter the magnetic separation process for magnetic separation with a magnetic field strength of 0.8T. Obtain vanadium-titanium magnetite concentrate II and titanium-rich titanium rough ore; the titanium-rich titanium rough ore is pretreated and flotation (same as embodiment 1):

[0055] The magnetic separation results are shown in Table 1.

[0056] Table 1 embodiment 2 selection results

[0057]

...

Embodiment 3

[0062] In order to explore the effect of magnetic field strength on the separation efficiency of iron and titanium, we take the grade of Fe obtained after process selection as 53.99% and TiO 2 The vanadium-titanium magnetite concentrate I with a grade of 14.86% is mixed with 0.1M sodium hexametaphosphate aqueous solution to make a slurry with a concentration of 40%, and then it is sprayed into the grinding equipment under 20MPa high pressure for grinding, and the grinding particle size is -5 micron, enter into magnetic separation process then and carry out magnetic separation, and magnetic field intensity is variable (seeing table 2).

[0063] Obtain the vanadium-titanium magnetite concentrate II and the titanium-rich titanium rough ore; the titanium-rich titanium rough ore is subjected to pretreatment and flotation (same as Example 1). The selection process is as follows figure 2 shown.

[0064] Table 2 embodiment 3 selection results

[0065]

[0066]

[0067] As ca...

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Abstract

The invention belongs to the field of mineral separation, and particularly relates to a beneficiation method of vanadium-titanium magnetite concentrate. The beneficiation method comprises the following steps: (1) mixing vanadium-titanium magnetite concentrate I and an aqueous solution dissolved with a dispersing agent to prepare ore pulp; (2) carrying out wet ball milling treatment on the ore pulp, and controlling the proportion of fine ore with the granularity being minus 15 microns after ball milling to be 95% or above; and (3) carrying out magnetic separation on the ground fine ore to obtain iron-rich vanadium-titanium magnetite concentrate II and titanium-rich coarse titanium ore after separation. The magnetic field intensity in the magnetic separation process is 0.1-1.3 T. In addition, the invention further relates to a method for carrying out pretreatment-flotation on the obtained coarse titanium ore, and through combined control over the ore grinding process and conditions, efficient separation of iron and titanium can be achieved based on an ore grinding mechanism.

Description

technical field [0001] The invention belongs to the field of mineral processing, in particular to a beneficiation method for improving the utilization rate of vanadium-titanium magnetite concentrate. Background technique [0002] my country's vanadium-titanium magnetite deposits are widely distributed and rich in reserves. The reserves and mining volume rank third in the country's iron ore. more than tons. In vanadium-titanium magnetite, although the grade of iron is often higher than 20%, the grade of vanadium-titanium magnetite concentrate obtained after sorting is often lower than 55%, while TiO 2 The content is as high as 15%. According to statistics, vanadium-titanium magnetite concentrate TiO 2 For every 1% increase in the content, the iron loss of the blast furnace will increase by 0.5-1%, and the slag TiO 2 The content is increased by 1.8-2.2%. In this process, while increasing the difficulty of blast furnace ironmaking and excessive iron loss, TiO 2 The amount ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B1/00B03B1/04B02C17/20
CPCB03B7/00B03B1/00B03B1/04B02C17/20Y02P10/20
Inventor 陈攀王静刚曹建伍佳美
Owner CENT SOUTH UNIV
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