Method for extracting vanadium through oxygen-enriched roasting and vanadium-extracting device

An oxygen-enriched roasting and roasting technology, which is applied in the field of vanadium extraction devices, can solve problems such as high energy consumption, environmental pollution, and low production capacity, and achieve the effects of high automation, serious pollution, and simple structure

Active Publication Date: 2010-06-02
陕西秦枫科技有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing rotary kiln roasting process has problems such as high energy consumption, low production capacity, and serious environmental pollution.

Method used

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  • Method for extracting vanadium through oxygen-enriched roasting and vanadium-extracting device
  • Method for extracting vanadium through oxygen-enriched roasting and vanadium-extracting device
  • Method for extracting vanadium through oxygen-enriched roasting and vanadium-extracting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048]The stone coal vanadium ore containing 0.66% vanadium is crushed to 325 mesh and dried, and then the ore powder dried to a moisture content of ≤1% is mixed with oxygen-enriched air containing 99% oxygen through the screw feeder 1 and sprayed through the nozzle 3 into the reaction tower 5, under the condition of efficient mixing of vanadium ore and oxygen-enriched air, the process of decarburization, desulfurization and oxidation of low-valence vanadium to high-valence vanadium V is carried out. The bottom of the reaction tower 5 is fed with low-pressure industrial pure oxygen through the low-pressure industrial pure oxygen interface 8 to maintain the oxidizing atmosphere in the furnace. The roasting was continued for 180 minutes under the push action, and was discharged from the bottom of the furnace. The furnace charge was detected to have an oxidation conversion rate of 90.23% from low-valence vanadium to high-valence vanadium V.

Embodiment 2

[0050] The stone coal vanadium ore containing 1.15% vanadium is crushed to 140 mesh and dried, and then the ore powder dried to a moisture content of ≤1% is mixed with oxygen-enriched air containing 70% oxygen through the screw feeder 1 and sprayed through the nozzle 3 In the reaction tower 5, the process of decarburization, desulfurization and oxidation of low-valence vanadium to high-valence vanadium V is carried out under the condition of highly efficient mixing of vanadium ore and oxygen-enriched air. The bottom of the reaction tower 5 is fed with low-pressure industrial pure oxygen through the low-pressure industrial pure oxygen interface 8 to maintain the oxidizing atmosphere in the furnace. The roasting was continued for 120 minutes under the push action, and was discharged from the bottom of the furnace. The furnace charge was tested to have an oxidation conversion rate of 92.18% from low-valence vanadium to high-valence vanadium V.

Embodiment 3

[0052] The stone coal vanadium ore containing 1.53% vanadium is crushed to 200 mesh and dried, and then the ore powder dried to a moisture content of ≤1% is mixed with oxygen-enriched air containing 90% oxygen through the screw feeder 1 and sprayed through the nozzle 3 into the reaction tower 5, under the condition of efficient mixing of vanadium ore and oxygen-enriched air, decarburization, desulfurization and oxidation process of low-valence vanadium to high-valence vanadium V are carried out, the temperature of reaction tower 5 is controlled at 550°C, and the temperature of furnace 7 is 850°C At the bottom of the reaction tower 5, low-pressure industrial pure oxygen is introduced through the low-pressure industrial pure oxygen interface 8 to maintain the oxidizing atmosphere in the furnace. Roasting continued for 30 minutes under the impetus of the furnace, and was discharged from the bottom of the furnace. The furnace charge was detected to have an oxidation conversion rate...

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Abstract

The invention discloses a method for extracting vanadium through oxygen-enriched roasting and a vanadium-extracting device. The left side of a furnace body is connected with a screw feeder and a nozzle respectively; the inside of the furnace body is connected with a reaction tower; the furnace body is connected with a furnace hearth; the furnace hearth is connected with a spiral discharger; a flue gas outlet is connected with a flue; the top of the flue is connected with a dust collector; the furnace hearth is provided with a vanadium discharge outlet; the nozzle is connected with a oxygen-enriching valve; and the furnace hearth is connected with a low-pressure industrial pure oxygen interface. The method comprises the following steps: breaking vanadium-containing material to be powder with the water content less than or equal to 1 percent; spraying raw material mixed with oxygen-enriched air into the reaction tower for roasting through the nozzle; allowing the material to stay in the reaction tower for more than 1 second and stay in the furnace hearth for more than 1 second; continuing to roast under the pushing effect of the spiral discharger; and discharging the obtained product out from the bottom end of a furnace. The device has the advantages of high production capacity, small amount of flue gas, self-heating in the roasting process, high metal recovery rate, no environmental pollution, low cost and wide application in the metallurgical industry.

Description

technical field [0001] The invention relates to a method for extracting vanadium by oxygen-enriched roasting and a device for extracting vanadium. Background technique [0002] The purpose of roasting vanadium-containing materials is to oxidize low-valent vanadium in vanadium ore to soluble pentavalent vanadium. For vanadium-bearing stone coal, due to the external reducing environment during its formation, only V(III) and V(IV) exist in stone coal, and V(III) accounts for the vast majority. The ionic radius and electronegativity of V(III) and Al(III) are similar, and the coordination number is the same, so that V(III) mainly replaces Al(III) and enters the six-coordinated aluminum-oxygen octahedral structure. , or low-valent vanadium exists in the silicon-oxygen tetrahedral structure of the ore in the form of isomorphism, and the combination is strong. Therefore, only by destroying the ore structure can the low-valence vanadium in the ore be oxidized to pentavalent vanadiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C01G31/02
Inventor 戴曦马荣凯邬建辉李骄伦
Owner 陕西秦枫科技有限责任公司
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