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A kind of leaching method of extracting vanadium from stone coal

A stone coal and leaching technology, which is applied in the direction of improving process efficiency and can solve problems such as low leaching rate, large pollutant discharge, and complex forms of vanadium

Active Publication Date: 2019-12-24
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a leaching method for extracting vanadium from stone coal, which is mainly aimed at complex occurrence forms of vanadium in the process of extracting vanadium from stone coal and difficulty in leaching. The traditional leaching method has high cost, complicated process and low leaching rate. , large pollutant discharge and other issues

Method used

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  • A kind of leaching method of extracting vanadium from stone coal
  • A kind of leaching method of extracting vanadium from stone coal
  • A kind of leaching method of extracting vanadium from stone coal

Examples

Experimental program
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Effect test

Embodiment 1

[0089] Embodiment 1: a kind of leaching method of extracting vanadium from stone coal, concrete operations are as follows:

[0090] A stone coal vanadium mine in Huaihua, Hunan, the mass percentage of its chemical composition is:

[0091] Table 1 Raw ore multi-element analysis results / %

[0092]

[0093] After the ore is crushed, water is added to grind the ore to obtain a stone coal slurry with a particle size of -74 μm accounting for more than 85% and a liquid-solid ratio of 2.

[0094]Add the above-mentioned stone coal slurry into the leaching tank, at 300r.min -1 Under stirring, add a leaching agent with a mass concentration of 5% HCl evenly, keep the pH value of the pulp in the range of 3.5-4.0, leaching for 3 hours, and settle the leaching slurry for 1 hour, release the upper leachate, and the bottom is a section of concentrate; test this The leaching rate of step vanadium is 1.2%, and the leaching rate of iron is 2.1%.

[0095] Add water to a section of concentrat...

Embodiment 2

[0100] Embodiment 2: a kind of leaching method of extracting vanadium from stone coal, concrete operations are as follows:

[0101] A leaching test was carried out on a high-calcium stone coal-vanadium mine in Tongshan, Hubei. V in this mineral 2 o 5 The content is 0.86%. The gangue minerals are mainly mica, calcite, dolomite and pyrite. The composition is as follows:

[0102] Table 2 Stone coal mine multi-element analysis results / %

[0103]

[0104] S1: After the ore is crushed, water is added to grind the ore to obtain a stone coal slurry with a particle size of -74 μm accounting for 86.5% and a liquid-solid ratio of 3.

[0105] S2: Add the above-mentioned stone coal slurry into the leaching tank, at 200r·min -1 Under stirring, evenly add a leaching agent with a mass concentration of 6.0% HCl, keep the pH value of the ore slurry in the range of 6-6.8, leaching for 4 hours, press filter the leaching slurry, and obtain a section of leaching solution and a section of con...

Embodiment 3

[0112] Compared with Example 2, the only difference is that in S2, the pH value of the slurry is controlled within the range of 2.0-3.0, leached for 4 hours, and the leached slurry is subjected to pressure filtration to obtain a section of immersion solution and a section of concentrate, and detect the vanadium in this step. The leaching rate of iron is 3.1%, the leaching rate of iron is 3.3%, and the leaching rate of calcium is 98.7%.

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Abstract

The invention relates to an extraction method of stone coal extracted vanadium. The extraction method comprises the steps that firstly, stone coal is produced to be stone coal ore pulp through pre-treatment procedures of smashing-ore grinding by adding water; low-concentration hydrochloric acid serves as a leaching agent to firstly leach impurities such as potassium, calcium, magnesium and aluminum, and one-stage ore concentrate and one-stage immersion liquid are obtained; the one-stage ore concentrate is floated by using a regulating agent, an inhibitor and a collecting agent, and fuel carbonand vanadium ore concentrate are obtained; the vanadium ore concentrate is dehydrated, dried and ground to be powder, and the ore concentrate dry powder is produced; sulfuric acid serves as an adhesive, the ore concentrate dry powder is shaped and aged in the air; the aged pellet is salinized at the temperature of 200-330 DEG C, vanadium in the pellet is converted to be soluble vanadium sulfate,and a salinized pellet is obtained; and the salinized pellet is subjected to leaching by using water, and second-stage immersion liquid and leached slag are obtained. The leaching rate of vanadium canbe as high as 90-96%, and the industrialized application prospect is good.

Description

technical field [0001] The invention discloses a leaching method for extracting vanadium from stone coal, which belongs to "extracting metal compounds from ore or concentrate by wet method" in chemistry and metallurgy, and specifically relates to a leaching method for vanadium in stone coal. Background technique [0002] Vanadium is a metal with good high temperature resistance. It is widely used in metallurgy, aviation, chemical industry, new energy battery and other industries. It is a strategic mineral resource related to the national economy and people's livelihood. Generally speaking, my country's vanadium resources are mainly composed of two parts, one is vanadium-titanium magnetite, and the other is stone coal. Stone coal is widely distributed in my country. According to current relevant data, the proven reserves of vanadium are 118 million tons (in V 2 o 5 ), accounting for 87% of the total domestic reserves. Mica-type vanadium-bearing stone coal is a kind of prim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/10C22B3/44C22B3/04C22B1/24C22B34/22C22B26/22C22B26/20
CPCC22B1/2406C22B3/04C22B3/10C22B3/44C22B26/20C22B26/22C22B34/22Y02P10/20
Inventor 刘永蔡梓麒罗明亮李向阳曾志伟刘晓璐
Owner NANHUA UNIV
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