Method for comprehensively recovering carbon from extraction of vanadium from stone coal

A recovery method, stone coal technology, applied in the petroleum industry, improvement of process efficiency, solid fuel, etc., can solve the problem of not considering the possibility of carbon-rich vanadium concentrate, low vanadium enrichment rate in smoke dust, high cost of flue gas treatment, etc. problems, to achieve the effect of reducing the grade of industrial mining, reducing the cost of purification and improving the comprehensive utilization rate

Inactive Publication Date: 2011-01-05
CENT SOUTH UNIV
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Problems solved by technology

my country is extremely rich in stone coal resources, and there are many techniques for extracting vanadium from stone coal, such as sodium roasting of stone coal-water leaching vanadium extraction, oxidation roasting of stone coal-acid leaching vanadium extraction, oxidation roasting of stone coal-alkali extraction of vanadium, direct extraction of vanadium from stone coal Vanadium extraction by acid leaching, etc., but in many cases, carbon is wasted in the process of vanadium extraction from stone coal
The calorific value of stone coal is generally only 800-1200 kcal / kg. Although the heat can be utilized after a certain amount of coal is mixed into the combustion, and the soot produced by combustion can be used to extract vanadium, but the direct combustion of vanadium-containing stone coal has the disadvantage of burning The equipment is severely corroded, and the flue gas produced by combustion contains a large amount of SO 2 , high cost of flue gas treatment, low enrichment rate of vanadium in flue dust and other defects
Therefore, there are also people who have tried stone coal beneficiation, but the stone coal beneficiation carried out is to separate carbon-containing minerals by flotation as the goal, to obtain flotation carbon concentrate, and vanadium is enriched in the tailings after carbon removal. Considering the Possibility of Carbon-rich Vanadium Concentrates by Mixed Flotation of Carbon and Vanadium

Method used

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  • Method for comprehensively recovering carbon from extraction of vanadium from stone coal
  • Method for comprehensively recovering carbon from extraction of vanadium from stone coal
  • Method for comprehensively recovering carbon from extraction of vanadium from stone coal

Examples

Experimental program
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Effect test

Embodiment 1

[0028] For stone coal pulp with a particle size of less than 0.074mm accounting for 60% and a pulp concentration of 30%, add chemicals at the ratio of 1000g lime, 1000g water glass, 300g inhibitor TP-5, and 300g kerosene per ton of stone coal. Sweeping three essences" beneficiation process to obtain carbon-rich vanadium concentrate; the tailings after carbon vanadium selection are 2000g sulfuric acid, 1000g water glass, 300g butyl xanthate per ton of stone coal, 100g2 # The proportion of oil is added to the chemical, and the sulfur concentrate and final tailings are obtained according to the "one rough, one sweep and two fine" mineral processing process; carbon-rich vanadium concentrate is added with 160kg of sulfuric acid per ton of concentrate, and the liquid-solid ratio is 1.5:1. Pressure stirring and leaching for 6 hours, filtering to obtain leachate and leaching slag; leaching liquid is used to extract vanadium, leaching slag is added to mineral processing tail water at a ...

Embodiment 2

[0031] For stone coal pulp with a particle size of less than 0.074mm accounting for 65% and a pulp concentration of 33%, add chemicals at the ratio of 1500g lime, 800g water glass, 500g inhibitor TP-5, and 500g diesel per ton of stone coal. Sweep three fines" mineral processing process to obtain carbon-rich vanadium concentrate; the tailings after carbon vanadium separation are 2000g sulfuric acid, 500g water glass, 300g butyl xanthate per ton of stone coal, 100g2 # The proportion of oil is added to the medicament, and the sulfur concentrate and final tailings are obtained according to the "one rough, one sweep and two fine" mineral processing process; carbon-rich vanadium concentrate is added with 200kg of sulfuric acid per ton of concentrate, the liquid-solid ratio is 1.3:1, 165°C Oxygen pressure leaching for 2 hours, filtering to obtain the leachate and leach residue; the leachate is used for vanadium extraction, and the leach residue is added to the liquid after vanadium ex...

Embodiment 3

[0034] For stone coal pulp with a particle size of less than 0.074mm, 70% and a pulp concentration of 30%, 1000g of sodium carbonate, 800g of water glass, 500g of inhibitor TP-5, and 400g of kerosene are added to each ton of stone coal. Carbon-rich vanadium concentrates are obtained through the beneficiation process of "one sweep and three refinements"; the tailings after carbon and vanadium separation are 1000g sulfuric acid, 1000g water glass, 200g butyl xanthate per ton of stone coal, 150g2 # The proportion of oil is added to the medicament, and the sulfur concentrate and final tailings are obtained according to the "one rough, two sweep and three fine" mineral processing process; the carbon-rich vanadium concentrate is added with 180kg of sulfuric acid per ton of concentrate, and roasted at 240°C for 1 hour. After that, add water according to the liquid-solid ratio of 3:1 and stir and leach at 90°C for 1 hour, and filter to obtain the leachate and leach residue; the leachat...

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Abstract

The invention discloses a method for comprehensively recovering carbon from the extraction of vanadium from stone coal, which comprises: firstly, milling stone coal, adding water into the stone coal to prepare slurry, adding the inhibitor and flotation collector of gangue and pyrite, keeping the pH value of the slurry between 9 and 11.5, and floating to obtain carbon-enriched vanadium concentrate and tailings; and secondly, adding sulfuric acid in an amount which is 1.0 to 3.0 times the stoichiometric number of the acid soluble substance for reacting with the sulfuric acid in the carbon-enriched vanadium concentrate into the carbon-enriched vanadium concentrate for soaking the carbon-enriched vanadium concentrate in acid at normal pressure or reduced pressure or soaking the carbon-enriched vanadium concentrate in water after low-temperature sulfation and roasting, and filtering to obtain vanadium-containing leachate and vanadium extraction slag; using the vanadium-containing leachate for vanadium extraction; and selling the vanadium extraction slag, which is coal powder, as a fuel. The method can improve the comprehensive utilization rate of resources and the comprehensive economic benefit of vanadium extraction and reduce the industrial exploitation grade of the extraction of vanadium from stone coal. The method has high vanadium extraction rate and is environmentally-friendly. The coal powder, which is produced after the extraction of vanadium from the carbon-enriched vanadium concentrate obtained by stone coal flotation has low vanadium content and low sulfur content, so the corrosion to a burner and the wear caused by smelting slag to the burner when the stone coal is burnt are reduced effectively and the smoke desulfuration and purification cost are reduced at the same time. The method is suitable for industrial production.

Description

technical field [0001] The invention relates to a method for comprehensively recovering vanadium and carbon from stone coal. Background technique [0002] Stone coal is a typical carbon-bearing shale, which not only contains a large amount of carbon, but also contains vanadium, aluminum, iron, molybdenum, nickel, sulfur and other elements. When V 2 o 5 The content reaches above 0.7%, stone coal is usually mined as vanadium ore. my country is extremely rich in stone coal resources, and there are many techniques for extracting vanadium from stone coal, such as sodium roasting of stone coal-water leaching vanadium extraction, oxidation roasting of stone coal-acid leaching vanadium extraction, oxidation roasting of stone coal-alkali extraction of vanadium, direct extraction of vanadium from stone coal Vanadium extraction by acid leaching, etc., but in many cases carbon is wasted in the process of vanadium extraction from stone coal. The calorific value of stone coal is genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C10L5/04C22B3/08B03D1/012B03D101/02B03D103/08
CPCY02P10/20
Inventor 王学文王晖符剑刚王明玉梁威叶普红
Owner CENT SOUTH UNIV
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