Vanadium ore beneficiation method

A mineral processing method and vanadium ore technology, applied in the field of vanadium ore dressing, can solve the problems of large environmental pollution, high roasting cost, no profit space, etc., and achieve the effect of low energy consumption

Inactive Publication Date: 2020-04-24
CINF ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1) Due to the high cost of roasting, when the whole ore is roasted, according to the existing vanadium market price, when the raw ore grade is lower than 0.7%, there is no room for profit in industrial production;
[0004] 2) Vanadium ore in stone coal mainly exists in the silicate mineral lattice in the form of isomorphism. To leach vanadium ore, it needs to be roasted with additives at high temperature to destroy the crystal structure. Currently, calcification roasting or Sodiumized roasting, but the effect of calcified roasting is inferior to sodiumized roasting, but when sodiumized roasting is used, sodium chloride or sodium sulfate is generally used as an additive, and these two additives will generate chlorine gas and sulfur dioxide respectively under high temperature roasting conditions. Great pollution to the environment

Method used

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  • Vanadium ore beneficiation method

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Experimental program
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Effect test

Embodiment 1

[0022] In this embodiment, a stone coal vanadium mine in a certain place in Hubei is taken as an example, and the vanadium content of the raw ore is 0.8%.

[0023] 1) The stone coal vanadium ore is crushed in two stages and one closed circuit until the average particle size is 30mm, and then the crushed ore is discarded by an optical separator, the discarding rate reaches 25%, and the ore recovery rate is 95%; In the waste ore, the content of vanadium is enriched to 1.45%; the thrown gangue is directly sent to the underground for filling.

[0024] 2) Use the patent of Changsha Nonferrous Metallurgical Design and Research Institute Co., Ltd. (China Invention Authorization CN201310602621.2) to crush the discarded ore, that is, use a high-pressure roller mill in a closed circuit to crush it to an average particle size of 3mm.

[0025] 3) Add 3% borax relative to the total mass of the ore to the crushed ore, and after mixing, use a fluidized bed furnace to decarburize and roast fo...

Embodiment 2

[0027] In this embodiment, a stone coal vanadium mine in a certain place in Hubei is taken as an example, and the ore contains 0.6% vanadium.

[0028] 1) The stone coal vanadium ore is crushed in two stages and one closed circuit until the average particle size is 20mm, and then the crushed ore is discarded by an optical separator, the discarding rate reaches 30%, and the ore recovery rate is 90%; In the waste ore, the content of vanadium is enriched to 1.38%; the thrown gangue is directly sent to the underground for filling.

[0029] 2) Use the patent of Changsha Nonferrous Metallurgical Design and Research Institute Co., Ltd. (China Invention Authorization CN201310602621.2) to crush the discarded ore, that is, use a high-pressure roller mill to crush it in a closed circuit until the average particle size is 5mm.

[0030] 3) Add borax that is 5% relative to the total mass of ore in the crushed ore, and after mixing, use a fluidized bed furnace to carry out decarburization and...

Embodiment 3

[0032] In this embodiment, taking a stone coal vanadium mine in a certain place in Hubei as an example, the vanadium content of the raw ore is 1.4%.

[0033] 1) The stone coal vanadium ore is crushed in two stages and one closed circuit until the average particle size is 50mm, and then the crushed ore is discarded by an optical separator. The discarding rate reaches 20%, and the ore recovery rate is 93%; In the waste ore, the content of vanadium is enriched to 1.97%; the thrown gangue is directly sent to the underground for filling.

[0034] 2) Use the patent of Changsha Nonferrous Metallurgical Design and Research Institute Co., Ltd. (China Invention Authorization CN201310602621.2) to crush the discarded ore, that is, use a high-pressure roller mill in a closed circuit to crush the average particle size to 1.5mm.

[0035] 3) Add 2% borax relative to the total mass of the ore to the crushed ore, and after mixing, use a fluidized bed furnace to decarburize and roast at 850°C fo...

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Abstract

The invention discloses a vanadium ore beneficiation method which comprises the following steps: crushing ores, adopting a photometric sorter to discard the crushed ores, and sending the discarded ores to next sorting operation; adopting a high-pressure roller mill system to carry out closed-circuit crushing on the discarded ores to obtain crushed ores; adding borax in the crushed ores, roasting the ores in a fluidized bed furnace to crush the crystal structure of the vanadium ore to obtain roasted vanadium ore; crushing the roasted vanadium ore, then, adding leaching solution for leaching toobtain leached ore pulp; carrying out filter pressing washing operation on the leached ore pulp, wherein the filter residues can directly go underground for filling or is externally sold as building material articles; enabling the leaching solution to enter next step; and carrying out extraction, reextraction, vanadium precipitation and calcination operation on the leaching solution to obtain vanadium. According to the vanadium ore beneficiation method, borax is added to crush the crystal structure of the vanadium ore; and as the self stability of borax, generation of harmful gas is avoided during the roasting process and the vanadium ore beneficiation method belongs to an environmentally-friendly type roasting technology.

Description

technical field [0001] The invention belongs to the technical field of polymetallic beneficiation, and in particular relates to a beneficiation method of vanadium ore. Background technique [0002] In nature, stone coal vanadium ore mainly exists on the surface of ferrite colloids and clay minerals in the form of adsorption, or replaces Al(Ⅲ) ions of mica-like bauxite with V(Ⅲ) isomorphism, and is dispersed The form is distributed in mica-like minerals. At present, the adsorption stone coal vanadium ore can obtain a better leaching rate by direct acid leaching, but the stone coal vanadium ore that exists in the same quality and shape generally needs to be roasted at high temperature with the addition of a roasting agent. The process proposes that vanadium ore mainly has the following problems: [0003] 1) Due to the high cost of roasting, when the whole ore is roasted, according to the existing vanadium market price, when the raw ore grade is lower than 0.7%, there is no r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B1/10C22B3/08C22B3/22
CPCC22B34/22C22B1/10C22B3/08C22B3/22Y02P10/20
Inventor 卿林江
Owner CINF ENG CO LTD
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