Method for leaching metal in vanadium titano-magnetite through full acid method

A technology of vanadium titanomagnetite and metal elements, applied in the direction of improving process efficiency, can solve problems such as low resource utilization rate, high technical difficulty, environmental pollution, etc., and achieve high resource utilization rate, increase specific surface area, and recovery effect. Good results

Inactive Publication Date: 2018-06-15
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
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Problems solved by technology

[0011] In order to solve various problems such as high technical difficulty, high cost, high energy consumption, serious environmental pollution, and low utilization rate of resources in the existing methods of processing and utilizing the above-mentioned vanadium-titanium magnetite concentrate, an object of the present invention is to provide a stable Efficient and widely applicable vanadium-titanium magnetite concentrate acid leaching utilization recovery method

Method used

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  • Method for leaching metal in vanadium titano-magnetite through full acid method

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Embodiment 1

[0039] Embodiment 1 vanadium-titanium magnetite leaching

[0040] The mineral of this embodiment is the vanadium-titanium magnetite concentrate of a certain mine in Xinjiang, and the ore contains vanadium, titanium, and iron at 0.538%, 3.24%, and 63.09%, respectively.

[0041] See figure 1 100g of the vanadium-titanium-magnetite concentrate is taken and ball milled with water in a three-roller four-barrel ball mill until the particle size of less than 0.074mm accounts for 60%. Take 20g of the ore sample after grinding for acid leaching, and use 100mL of 15% hydrofluoric acid in the first stage of leaching at 60°C for 3h with heating and stirring, the liquid-solid ratio is 1:5, and the stirring speed is 500rad / min.

[0042] After the leaching is completed, a vacuum pump is used to separate the solid and liquid to collect the leaching solution and leaching residue. The leaching solution is collected for use in the next process, and the leaching residue is subjected to secondar...

Embodiment 2

[0044] Embodiment 2 vanadium-titanium magnetite leaching

[0045] The mineral of this embodiment is the vanadium-titanium magnetite concentrate of a certain mine in Xinjiang, which contains vanadium, titanium, and iron at 0.869%, 5.46%, and 60.15%, respectively.

[0046]Take 100 g of the vanadium-titanium-magnetite concentrate and ball mill it with water in a three-roller and four-barrel ball mill until the particle size is less than 0.074mm and accounts for 80%. Take 100g of the ore sample after grinding and carry out full-acid leaching. A total of 200mL mixed acid of 5% hydrofluoric acid + 3% sulfuric acid + 2% hydrochloric acid is used for the first-stage leaching solution at 80°C. It is heated and stirred for 1h, and the liquid-solid ratio is 1: 2. The stirring speed is 800rad / min.

[0047] After the leaching is completed, a vacuum pump is used to separate the solid and liquid to collect the leaching solution and leaching residue. The leaching solution is collected for u...

Embodiment 3

[0049] Embodiment 3 ilmenite leaching

[0050] The mineral in this embodiment is the ilmenite concentrate of a mine in Panzhihua, which contains 9.38% and 57.26% of titanium and iron respectively.

[0051] Take 200g of the above-mentioned ilmenite concentrate and ball mill it with water in a three-roller four-barrel ball mill until the particle size is less than 0.074mm and accounts for 70%. Take 200g of the ore sample after grinding and carry out full-acid leaching. A total of 800mL mixed acid of 6% hydrofluoric acid + 3% sulfuric acid + 2% phosphoric acid is used for the first stage of leaching solution at 70°C. It is heated and stirred for 2h, and the liquid-solid ratio is 1: 4. The stirring speed is 600rad / min.

[0052] After the leaching is completed, a vacuum pump is used to separate the solid and liquid to collect the leaching solution and leaching residue. The leaching solution is collected for use in the next process, and the leaching residue is subjected to seconda...

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Abstract

The invention discloses a method for recycling valuable metal in vanadium titano-magnetite through acid high-pressure leaching. The method comprises the steps that firstly, a vanadium titano-magnetiteconcentrate is mechanically activated; secondly, first acid liquid is provided as a leaching agent, the leaching agent is added into the vanadium titano-magnetite concentrate treated in the first step, and first-segment leaching is carried out; thirdly, solid-solution separation is carried out to obtain first leaching liquid and first leaching slag; fourthly, second acid liquid is provided as a leaching agent, and is added into first leaching slag to be subject to second-segment leaching; fifthly, solid-solution separation is carried out to obtain tailings and second leaching liquid, and thesecond leaching liquid is subject to certain proportion treatment to be circularly used as the first acid liquid; sixthly, the first leaching liquid is subject to subsequent extraction-separation-step-by-step crystallization and sedimentation-separation process recycling. Two-segment leaching is adopted to sufficiently recycle valuable metal in ore, the recycling effect is good, the leaching rateis stable, and the recycling rate of valuable metal elements of vanadium, titanium and iron can reach 95% or above, and the resource utilization rate is high.

Description

technical field [0001] The invention relates to the field of chemical leaching of vanadium-titanium magnetite, in particular to a method for leaching and recovering valuable metal elements from vanadium-titanium magnetite. Background technique [0002] Vanadium-titanium magnetite is a complex and difficult-to-handle mineral resource in which a variety of valuable elements coexist. Because it contains a large amount of metal elements such as vanadium, titanium, and iron, it has extremely high comprehensive utilization value. important ore raw materials. With the depletion of resources and the gradual expansion of industrial demand, the green and efficient recovery of valuable elements in vanadium-titanium magnetite concentrate has attracted more and more attention. [0003] At present, for the comprehensive recycling of vanadium-titanium magnetite, there are mainly blast furnace-converter method, reduction-grinding method, pre-reduction-electric furnace method, sodium vanadi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/06C22B34/12C22B34/22
CPCC22B3/06C22B34/1245C22B34/22Y02P10/20
Inventor 李浩然吴浩王洪君廖圣德
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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