Activating acid leaching method for extracting vanadium from bone coal

A technology of stone coal and acid leaching, applied in the direction of improving process efficiency, can solve the problem of no literature reports in related processes, and achieve the effects of reducing energy consumption, reducing manufacturing requirements, and low acid leaching temperature

Inactive Publication Date: 2012-03-28
森松(江苏)海油工程装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] But there is no any literature report on the related process of above-mentioned discovery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Lumpy stone coal containing 0.5% vanadium and 20.2% carbon is first crushed in a jaw crusher to a particle size of less than 10 mm, and then crushed by a hammer crusher to a particle size of less than 2 mm. The crushed stone coal sample is continuously ground and activated in a planetary mill, the speed is 350 rpm, the ball milling medium is corundum balls with a diameter of 2 mm, and the ball milling time is 5 hours; the grinding process is dry, without adding grinding aids, after grinding The final stone coal particle size is below 200 mesh. The activated sample enters the normal-pressure acid leaching tank, heated in a water bath, and the heating temperature is 98 o C, the leaching agent is 20% dilute hydrochloric acid, the solid-liquid mass ratio of the activated stone coal sample to the leaching agent is 1:1, and the acid leaching time is 1 hour to obtain a leaching solution containing vanadium and other impurity ions.

[0022] The amount of vanadium in the soluti...

Embodiment 2

[0024] Lumpy stone coal containing 1.0% vanadium and 16.9% carbon content is first crushed in a jaw crusher to a particle size of less than 10mm, and then crushed by a hammer crusher to a particle size of less than 2mm. The crushed stone coal sample is continuously ground and activated in a planetary mill, the speed is 400 rpm, the ball milling medium is corundum balls with a diameter of 5mm, and the milling time is 3 hours; the milling process is dry, without adding grinding aids, after milling The final stone coal particle size is below 325 mesh. The activated sample enters the normal-pressure acid leaching tank, heated in a water bath, and the heating temperature is 85 o C, the leaching agent is 20% dilute hydrochloric acid, the solid-liquid mass ratio of the activated stone coal sample to the leaching agent is 1:1.5, and the acid leaching time is 40 minutes to obtain a leaching solution containing vanadium and other impurity ions.

[0025] The amount of vanadium in the so...

Embodiment 3

[0027] Lumpy stone coal containing 1.5% vanadium and 11.2% carbon is first crushed in a jaw crusher to a particle size of less than 10mm, and then crushed by a hammer crusher to a particle size of less than 2mm. The crushed stone coal sample is activated by closed grinding in a vibrating mill, the vibration frequency is 300 times per minute, and the grinding time is 50 minutes; the grinding process is dry, without adding grinding aids, and the particle size of the stone coal after grinding is Below 200 mesh. The activated sample enters the normal-pressure acid leaching tank, heated in a water bath, and the heating temperature is 90 o C, the leaching agent is 20% dilute sulfuric acid, the solid-liquid mass ratio of the activated stone coal sample to the leaching agent is 1:1.5, and the acid leaching time is 1 hour to obtain a leaching solution containing vanadium and other impurity ions.

[0028] The amount of vanadium in the solution was measured by ferrous ammonium sulfate t...

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PUM

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Abstract

The invention discloses an activating acid leaching method for extracting vanadium from bone coal. The method is innovative that a bone coal grinding step employs mechanical force for activation; clay minerals containing vanadium like illite in the bone coal bone coal are treated with mechanical force chemical reaction and activated through controlling rotating speed and vibration frequency of a planet mill or a vibromill of a jaw breaker and a hammer mill, ball milling time and particle size in each operation, but carbonaceous structure is not destroyed, so as to lay foundation for increasing yield of vanadium and obtain carbon rich acid leaching slag. The invention also has innovation that a normal pressure acid leaching method is employed to realize an extraction rate of 90-98%.

Description

technical field [0001] The invention relates to an activated acid leaching method for extracting vanadium from stone coal. Background technique [0002] my country's vanadium-containing stone coal reserves are extremely rich, accounting for 87% of my country's total vanadium reserves. Extracting vanadium from stone coal is an important development direction of my country's utilization of vanadium resources. In my country, the types of vanadium-containing stone coal are mainly carbonaceous and siliceous, also known as black shale. Almost all vanadium occurs in clay minerals such as vanadium-containing illite (that is, hydromica) and kaolinite. Vanadium is It partially replaces the aluminum in the alumina octahedron and exists in the illite lattice. In order for vanadium to be leached out of the illite structure, the illite structure must be destroyed and oxidized. [0003] The process of producing refined vanadium from stone coal can be divided into: acid leaching method, al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00C22B3/06C22B34/22
CPCY02P10/20
Inventor 司鹏郝振良张克雄
Owner 森松(江苏)海油工程装备有限公司
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