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A method for improving vanadium grade in vanadium concentrate by oxidation treatment-magnetic separation

A magnetic separation and oxidation treatment technology, applied in magnetic separation, chemical instruments and methods, solid separation, etc., can solve the problems of scattered distribution, low grade, complex process, etc., and achieve the goal of reducing the cost of vanadium extraction and reducing the amount of treatment Effect

Inactive Publication Date: 2019-06-07
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the V in vanadium-containing stone coal 2 o 5 The grade of vanadium is low, the occurrence form of vanadium is complex and the distribution is relatively dispersed, and the vanadium in stone coal can only be transformed into soluble pentavalent vanadium under the action of high temperature oxidation roasting or additives
This leads to the shortcomings of the current vanadium extraction process from stone coal, such as complex process flow, low vanadium recovery rate, and serious environmental pollution problems.

Method used

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  • A method for improving vanadium grade in vanadium concentrate by oxidation treatment-magnetic separation
  • A method for improving vanadium grade in vanadium concentrate by oxidation treatment-magnetic separation
  • A method for improving vanadium grade in vanadium concentrate by oxidation treatment-magnetic separation

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Embodiment 1

[0020] The implementation steps of the method described in this embodiment are:

[0021] (1) the vanadium concentrate obtained is crushed and screened to a particle size less than 0.074mm, to obtain a grinding product I;

[0022] (2) Put an appropriate amount of grinding product I into an alumina crucible, and place it in a high temperature reaction furnace at 900°C, CO / CO 2 Carry out calcination under the atmosphere of =1.2, and the calcination time is 1 hour to obtain calcined product II;

[0023] (3) The calcined product II obtained above is continuously crushed and sieved to a particle size of less than 0.074 mm, mixed with deionized water to make ore pulp, and subjected to magnetic separation in a 0.35 T magnetic field. The strong magnetic samples after magnetic separation are filtered, removed and dried to obtain vanadium concentrate products; the weak magnetic samples separated by magnetic separation are filtered and dried, and can be added to the vanadium-containing s...

Embodiment 2

[0026] The implementation steps of the method described in this embodiment are:

[0027] (1) the vanadium concentrate obtained is crushed and screened to a particle size less than 0.074mm, to obtain a grinding product I;

[0028] (2) Put an appropriate amount of grinding product I into an alumina crucible, and place it in a high-temperature reaction furnace at 1000°C, CO / CO 2 Carry out calcination under the atmosphere of = 1.5, the calcination time is 1 hour, obtain calcined product II;

[0029] (3) The calcined product II obtained above is continuously crushed and sieved to a particle size of less than 0.074 mm, mixed with deionized water to make ore pulp, and subjected to magnetic separation in a 0.35 T magnetic field. The strong magnetic samples after magnetic separation are filtered, impurity removal and drying to obtain vanadium concentrate products; the weak magnetic samples separated by magnetic separation are filtered and dried, and can be added to vanadium-containing...

Embodiment 3

[0032] The implementation steps of the method described in this embodiment are:

[0033] (1) the vanadium concentrate obtained is crushed and screened to a particle size less than 0.074mm, to obtain a grinding product I;

[0034] (2) Put an appropriate amount of grinding product I into an alumina crucible, and place it in a high temperature reaction furnace at 1100°C, CO / CO 2Carry out calcination under the atmosphere of = 2.0, the calcination time is 1 hour, obtain calcined product II;

[0035] (3) The calcined product II obtained above is continuously crushed and sieved to a particle size of less than 0.074 mm, mixed with deionized water to make ore pulp, and subjected to magnetic separation in a 0.35 T magnetic field. The strong magnetic samples after magnetic separation are filtered, impurity removal and drying to obtain vanadium concentrate products; the weak magnetic samples separated by magnetic separation are filtered and dried, and can be added to vanadium-containing ...

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Abstract

The invention specifically relates to a method using oxidation treatment-magnetic separating to increase vanadium grade in vanadium concentrate. The method is characterized in that the vanadium concentrate obtained by reduction roasting-magnetic separating is used as the raw material, the vanadium concentrate is calcined for 1-3 hours under the conditions that calcining temperature is 1000-1473K and the volume ratio of calcining atmosphere CO / CO2 is 0.5-2.7, then magnetic separating is used to remove weakly magnetic FeO in the calcining product, and accordingly the vanadium grade in the vanadium concentrate is increased. The method has the advantages that when calcination is performed under the conditions that calcining temperature is 900 DEG C and CO / CO2 volume ratio is 1.2 for 1 hour, and the vanadium grade in the vanadium concentrate obtained after the magnetic separating can be increased from 12.83% to 15.23%; compared with the prior art, the method is simple in process, low in concentrate treatment quantity, economical and suitable for being applied to the technical fields of the increasing of the vanadium grade in the vanadium concentrate and the magnetic separating recyclingof vanadium concentrating phase.

Description

technical field [0001] The invention specifically relates to a method for improving vanadium grade by treating a vanadium-containing concentrate by oxidation treatment-magnetic separation separation. Background technique [0002] Vanadium-bearing stone coal is a unique vanadium ore resource in my country, and the reserves are very rich. However, due to the presence of V in vanadium-bearing stone coal 2 O 5 The grade of vanadium is relatively low, the occurrence form of vanadium is complex and the distribution is relatively dispersed, and vanadium in stone coal can only be converted into soluble pentavalent vanadium under the action of high-temperature oxidative roasting or additives. This leads to the disadvantages of complex process flow, low recovery rate of vanadium and serious environmental pollution in the current vanadium extraction process from stone coal. In view of the above shortcomings and deficiencies, the patent "A method for enriching vanadium in vanadium-co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02B03C1/015C22B34/22
CPCB03C1/015C22B1/02C22B34/22Y02P10/20
Inventor 闫柏军汪大亚吴六顺董元篪
Owner UNIV OF SCI & TECH BEIJING
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