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Method for extracting vanadium by mixing vanadium-containing ore powder and vanadium-containing steel slag by roasting

A technology for roasting and vanadium ore, applied in the field of vanadium metallurgy roasting, can solve the problems of surrounding environment pollution, large acid consumption, pollution, etc., and achieve the effects of reducing production cost, improving production capacity, and reducing material consumption.

Active Publication Date: 2020-03-31
陕西福盛钒业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the traditional sodium roasting vanadium extraction method, sodium chloride needs to be added as an additive, which will generate a large amount of chlorine gas when decomposed at high temperature, and will be discharged with the exhaust gas. Although there are related treatment devices, it will still cause huge pollution to the surrounding environment , vegetation is difficult to survive
[0003] Chinese patent CN201310537813X, in the method of using sodium-free roasting to clean and efficiently recover vanadium, other additives are added to the steel slag for roasting, which cannot make full use of a large number of low-content mineral resources
At the same time, direct or indirect pollution is brought about in the addition of roasting, which increases the pressure of environmental protection.
[0004] Chinese patent CN201410616904.7 The method for extracting vanadium from high-calcium vanadium-containing materials adopts a non-roasting process of sulfuric acid acid leaching and adding a reducing agent, which consumes a lot of acid, has high environmental protection costs for wastewater treatment, and has high impurity content, and can only be treated separately. Calcium slag cannot make full use of abundant low-grade vanadium-bearing mineral resources
It uses the calcium method instead of the sodium method roasting process, the actual conversion rate is relatively low, below 70%; at the same time, it is easy to form calcium vanadate which is insoluble in water, and the process is difficult to control

Method used

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  • Method for extracting vanadium by mixing vanadium-containing ore powder and vanadium-containing steel slag by roasting
  • Method for extracting vanadium by mixing vanadium-containing ore powder and vanadium-containing steel slag by roasting
  • Method for extracting vanadium by mixing vanadium-containing ore powder and vanadium-containing steel slag by roasting

Examples

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example 1

[0046] Example 1: Mixed roasting of vanadium-containing ore powder and high-calcium slag

[0047] Crushed ore powder: V 2 o 5 : 0.8%, particle size 90% 2 o 5 : 7.5%, CaO: 25-30%, crushed particle size 90% <18 mesh. Mix the crushed mineral powder and high-calcium steel slag according to the mass ratio of 35:65, add 11% water and mix evenly for later use; after the vertical kiln is filled with dry material balls, start to slowly heat up, and start when the temperature of the silo rises to 250°C For blanking, press the mixed material into a 40×60×30mm block with a ball press machine (general equipment), evenly distribute it on the blanking car, with a feeding thickness of 15mm, and push it into the vertical roaster every 60 minutes Blanking and feeding once intermittently, gradually preheating from top to bottom, when the temperature of the silo rises to 750°C, it starts to keep warm for 24 hours, then cools down to 650°C and keeps warm for 24 hours, continuously roasting from...

example 2

[0048] Example 2: Mixed roasting of vanadium-containing ore powder and high-calcium slag

[0049] Crushed ore powder: V 2 o 5 : 0.9%, particle size 90% 2 o 5 : 7%, CaO: 25-30%, crushed particle size 90% <18 mesh. Mix crushed mineral powder and high-calcium steel slag at a mass ratio of 15:40, add 8% water and mix evenly for later use; after the vertical kiln is filled with dry material balls, start to heat up slowly, and start when the temperature of the silo rises to 250°C For blanking, press the mixed material into a 40×60×30mm block with a ball press machine (general equipment), evenly distribute it on the blanking car, the thickness of the material is 18mm, and push it into the vertical roaster every 50 minutes Blanking and feeding once intermittently, gradually preheating from top to bottom, when the temperature of the silo rises to 600°C, it starts to keep warm for 48 hours, then adjusts the temperature to 650°C and keeps warm for 42 hours, continuously roasting from ...

example 3

[0050] Example 3: Mixed roasting of vanadium-containing ore powder and high-calcium slag

[0051] Crushed ore powder: V 2 o 5 : 0.8%, particle size 90% 2 o 5 : 7.5%, CaO: 25-30%, crushed particle size 90% <18 mesh. Mix the crushed mineral powder and high-calcium steel slag according to the mass ratio of 40:70, add 15% water and mix evenly for later use; after the vertical kiln is filled with dry material balls, start to heat up slowly, and start when the temperature of the silo rises to 250°C For blanking, press the mixed material into a 40×60×30mm block with a ball press machine (general equipment), evenly distribute it on the blanking car, the thickness of the material is 14mm, and push it into the vertical roaster every 60 minutes Blanking and feeding once intermittently, gradually preheating from top to bottom, when the temperature of the silo rises to 860°C, it starts to keep warm for 25 hours, then cools down to 600°C and keeps warm for 30 hours, and continuously roas...

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Abstract

The invention discloses a mixed calcination vanadium extraction method for vanadium-containing mineral powder and vanadium-containing steel slag, wherein the steel powder and mineral powder are directly mixed according to a certain proportion for calcination, no additive is added in the mixed calcination process, the vanadium resource is fully utilized and the problem that single steel slag tailings are difficult to utilize is solved. By using the vanadium-containing steel slag to drive the comprehensive utilization of the vanadium-containing mineral powder, the elements such as calcium, magnesium, aluminum, silicon and the like in the mineral powder are fully utilized, the steel slag plays a role of a calcination additive, the pollution problem caused by adding sodium chloride for calcination in the prior art is avoided; when the steel slag and the mineral powder are interacted with each other, the leaching rate is greatly improved than that of separately roasting the two materials, the roasting leaching rate is lower than 75% when the mineral powder or the steel slag is roasted separately, but when the two materials are mixed according to a certain proportion and roasted, the leaching rate can reach more than 80%; the problems that the vanadium mine or the steel slag cannot be roasted independently and the conversion rate is low.

Description

technical field [0001] The invention belongs to the field of vanadium metallurgy and roasting, and in particular relates to a method for extracting vanadium by mixing and roasting vanadium-containing ore powder and vanadium-containing steel slag. Background technique [0002] In the traditional sodium roasting vanadium extraction method, sodium chloride needs to be added as an additive, which will generate a large amount of chlorine gas when decomposed at high temperature, and will be discharged with the exhaust gas. Although there are related treatment devices, it will still cause huge pollution to the surrounding environment , vegetation is difficult to survive. [0003] Chinese patent CN201310537813X, in the method of using sodium-free roasting to cleanly and efficiently recover vanadium, other additives are added to steel slag for roasting, which cannot make full use of a large number of low-content mineral resources. At the same time, pollution is directly or indirectl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B1/24
CPCC22B1/02C22B1/2406
Inventor 何毅何明主赵德强何文斌王晓强田川
Owner 陕西福盛钒业科技有限公司