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Method for effectively roasting and leaching vanadium slag

A vanadium slag and leaching technology, applied in the field of efficient roasting and leaching of vanadium slag, can solve the problems of reducing the processing capacity of roasting equipment, increasing energy consumption and cost, reducing production efficiency, etc. Effect of mass reduction and liquid phase reduction

Inactive Publication Date: 2013-04-10
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the condition of the roasting furnace is improved and the production is guaranteed, the problem is that the production efficiency is greatly reduced, the energy consumption and cost are increased, and the processing capacity of the roasting equipment is reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take 500g of vanadium slag powder containing 8.5% vanadium, add it into 75g of industrial sodium carbonate and mix evenly to obtain a mixture. In addition, sodium carbonate was added to tap water to prepare 1500 g of a sodium carbonate solution with a mass percent concentration of 5% in advance to be used as a blank leach solution. In a strong oxidizing atmosphere, the mixture was calcined at 800°C for 150 minutes, and then the vanadium-containing mixture obtained by roasting (that is, vanadium-containing clinker) was cooled to 500°C and entered into a wet ball mill for grinding, and at the same time, 500 g of pre-prepared Filter the sodium carbonate solution after beating to obtain the primary filtrate and filter residue; add the filter residue to 500g of the blank leach solution, soak at a constant temperature of 85°C for 30min, and quickly filter with suction to obtain the secondary filtrate and filter residue; add the filter residue to the 500g blank leach solution ...

Embodiment 2

[0036] Take 500g of vanadium slag powder containing 8.7% vanadium, add it into 60g of industrial sodium carbonate and mix evenly to obtain a mixture. In addition, 1500 g of a 10% sodium carbonate solution was pre-prepared by adding sodium carbonate to tap water or / and four washes to be used as a blank leaching solution. In a strong oxidizing atmosphere, the mixture was calcined at 750°C for 150 minutes, and then the vanadium-containing mixture obtained by roasting (that is, vanadium-containing clinker) was cooled to 600°C and entered into a wet rod mill for grinding. At the same time, 500g of pre-prepared A good 10% sodium carbonate solution is beaten and filtered to obtain the primary filtrate and filter residue; the filter residue is added to the 500g blank leachate, soaked at a constant temperature of 90°C for 30min, and quickly filtered to obtain the secondary filtrate and filter residue; the filter residue is added to the In 500g of blank leach solution, soak at a constan...

Embodiment 3

[0039] Take 500g of vanadium slag powder containing 8.5% vanadium, add it into 90g of industrial sodium carbonate and mix evenly to obtain a mixture. In addition, 1500 g of a 7.5% sodium carbonate solution was pre-prepared by adding sodium carbonate to tap water or / and four washes to be used as a blank leaching solution. In a strong oxidizing atmosphere, the mixture was calcined at 700°C for 150 minutes, and then the vanadium-containing mixture obtained by roasting (that is, vanadium-containing clinker) was cooled to 550°C and entered into a wet ball mill for grinding, and at the same time, 500g of pre-prepared 7.5% sodium carbonate solution was beaten and filtered to obtain the primary filtrate and filter residue; the filter residue was added to the 500g blank leach solution, soaked at a constant temperature at 95°C for 30min, and quickly filtered to obtain the secondary filtrate and filter residue; the filter residue was added to the 500g blank leachate In the leaching solut...

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Abstract

The invention discloses a method for effectively roasting and leaching vanadium slag. The method comprises the following steps of: preparing a catalyst into vanadium slag powder of which the particle size is not more than 0.1mm and uniformly mixing to obtain a mixture; roasting the mixture under a strong oxidizing atmosphere to obtain vanadium-containing clinker; and treating the vanadium-containing clinker by leaching liquid, and performing suction filtration for many times so as to obtain leaching residues and vanadium solution, wherein the leaching agent is dissolved with water to obtain the leaching liquid. By the method, in a single vanadium slag system, two conversion steps in the vanadium slag roasting process are carried out separately, so that the amount of generated low-melting-point substances is reduced, the liquid phase quantity is reduced, and the production process can be stably and successfully carried out; and moreover, the operation process is simple and feasible, and the conventional production is hardly transformed a lot, and a new agent is not needed to be replaced.

Description

technical field [0001] The invention belongs to the fields of chemical industry and metallurgy, in particular, the invention relates to a high-efficiency roasting and leaching method for vanadium slag, wherein, through roasting and leaching, the water-insoluble vanadium in the vanadium slag is converted into water-soluble vanadate Enter the leaching solution to realize the enrichment and extraction of vanadium. Background technique [0002] Vanadium slag is the slag obtained by oxidation blowing of vanadium-containing molten iron, in which vanadium exists in the form of water-insoluble minerals. Generally, the vanadium slag needs to be roasted and leached to obtain an aqueous solution containing vanadate. The additive for roasting is sodium carbonate, and the leaching is carried out in water. In order to extract the vanadium in the vanadium slag as high as possible, the amount of additive added during roasting often needs to be excessive, and added to the vanadium slag at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B34/22
CPCY02P10/20
Inventor 李千文万龙飞
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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