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A method for extracting vanadium by heap leaching of vanadium-containing stone coal with concentrated sulfuric acid and additives

A technology of additive and concentrated sulfuric acid, which is applied in the field of vanadium-containing stone coal plus concentrated sulfuric acid and additive heap leaching vanadium extraction, can solve the problems of long stirring and leaching time, high requirements for ore powder fineness, and long wet stacking time, etc., and achieves controllable High performance and operability, low equipment investment and low production cost

Active Publication Date: 2011-11-30
张国茂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above methods have the disadvantages of high requirements on the fineness of mineral powder, long stirring and leaching time, and long wet stacking time, which lead to high production costs and large equipment investment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Pulverize the stone coal ore containing vanadium with a grade of 0.65% to -20 mesh; proportion according to parts by weight, wherein stone coal ore powder: concentrated sulfuric acid: additive aqueous solution = 100:18:6; the concentrated sulfuric acid has a content greater than 93 % industrial concentrated sulfuric acid, the additive aqueous solution is a mixed aqueous solution containing sodium chlorate 0.1mol / L-0.5 mol / L and hydrogen peroxide 0.1mol / L-0.5 mol / L. Concentrated sulfuric acid and additive aqueous solution are mechanically stirred until they are uniformly mixed until small pellets are produced and piled into a cone shape. The thickness of the pile side mineral powder is not less than 2 meters. PH ≥ 1; under normal temperature and pressure, send the stone coal ore powder with complete heap leaching reaction to the stirring leaching reactor, add water according to the solid-liquid weight ratio of 1:0.8 for mechanical stirring and leaching for 40 minutes, and...

Embodiment 2

[0021] Pulverize the stone coal ore containing vanadium with a grade of 1.0% to -20 mesh; proportion according to parts by weight, wherein stone coal ore powder: concentrated sulfuric acid: additive aqueous solution = 100:20:7; the concentrated sulfuric acid has a content greater than 93 % industrial concentrated sulfuric acid, the additive aqueous solution is a mixed aqueous solution containing sodium chlorate 0.1mol / L-0.5 mol / L and hydrogen peroxide 0.1mol / L-0.5 mol / L. Concentrated sulfuric acid and additive aqueous solution are mechanically stirred until they are uniformly mixed until small pellets are produced and piled into a cone shape. The thickness of the pile side mineral powder is not less than 2 meters. PH ≥ 1; under normal temperature and pressure, send the stone coal ore powder with complete heap leaching reaction to the stirring leaching reactor, add water according to the solid-liquid weight ratio of 1:1 for mechanical stirring and leaching for 30 minutes, and ad...

Embodiment 3

[0023] Pulverize the stone coal ore containing vanadium with a grade of 1.4% to -20 mesh; mix according to the ratio of parts by weight, wherein stone coal ore powder: concentrated sulfuric acid: additive aqueous solution = 100:22:8; the concentrated sulfuric acid has a content greater than 93 % industrial concentrated sulfuric acid, the additive aqueous solution is a mixed aqueous solution containing sodium chlorate 0.1mol / L-0.5 mol / L and hydrogen peroxide 0.1mol / L-0.5 mol / L. Concentrated sulfuric acid and additive aqueous solution are mechanically stirred until they are uniformly mixed until small pellets are produced and piled into a cone shape. The thickness of the pile side mineral powder is not less than 2 meters. PH ≥ 1; under normal temperature and pressure, send the stone coal ore powder with complete heap leaching reaction to the stirring leaching reactor, add water according to the solid-liquid weight ratio of 1:1.2 for mechanical stirring and leaching for 50 minutes...

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Abstract

The invention provides a method for extracting vanadium by heap leaching and adding concentrated sulfuric acid and an additive in vanadium-containing stone coal. The method comprises the following specific steps: smashing stone coal ore; proportioning based on weight part, evenly mixing proportioned stone coal ore powder, concentrated sulfuric acid and an additive aqueous solution through mechanical stirring until small pellets are generated and piled to be in a cone shape, and reacting for 2-5 days; feeding the stone coal ore powder subjected to complete heap leaching reaction to an agitation leaching reaction kettle, adding water in a solid-liquid ratio of 1: (0.8-1.2) for mechanical agitation leaching; adding a reducer sodium thiosulfate for reduction, adding calcium carbonate to regulate the PH value, and carrying out solid-liquid separation in a belt filter or a plate-and-frame filter press so as to obtain a blue mother liquid containing vanadium; and extracting the mother liquidwith a solvent or carrying out ion exchange, vanadium precipitation, drying and forging on the mother liquid so as to obtain vanadium pentoxide. By using the method, the grinding cost of the ore is saved and reduced, and grinding equipment and capital construction installation investments are reduced.

Description

technical field [0001] The invention relates to the field of chemical metallurgy, in particular to a method for extracting vanadium by heap leaching of vanadium-containing stone coal with concentrated sulfuric acid and additives. Background technique [0002] According to the comprehensive exploration conducted by the National Geological Department in the 1970s, the reserves of vanadium-containing stone coal in my country exceed the sum of the proven reserves of vanadium pentoxide resources in other countries in the world. Vanadium is a rare metal with a high melting point and has many excellent properties. It is widely used in metallurgy, chemical industry and other industries. With the rapid development of my country's modernization, the demand for vanadium and its compounds is increasing. Especially in recent years, the research and development of vanadium batteries will bring a new revolution in the field of energy. However, vanadium ore resources are scarce and scatt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B34/22
CPCY02P10/20
Inventor 张国茂
Owner 张国茂
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