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Method for quickly determining vanadium in coal mine containing scherbinaite

A technology for rapid determination and stone coal mining, which is applied in chemical analysis by titration, preparation of test samples, and analysis using chemical indicators. It can solve problems such as time-consuming, difficult to decompose, and affect color judgment, and achieve color The effect of clear judgment, large sampling volume and easy operation

Inactive Publication Date: 2010-03-10
XIANGTAN UNIV
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AI Technical Summary

Problems solved by technology

Due to the existence of excessive sodium peroxide, the crystal structure of vanadium-containing minerals in stone coal is completely destroyed. Therefore, the method measured V 2 o 5 The grade value is relatively accurate, but this method also has three main problems: 1) The sample decomposition needs to be carried out at 800°C. After the decomposition process is completed, it needs to be boiled repeatedly to ensure that the vanadium in the mineral is completely dissolved. This operation is time-consuming , loaded down with trivial details; 2) sampling amount is less, only 0.5000g, if the distribution of vanadium in the ore is uneven, just easily cause measuring error, and in order to solve this problem, need to carry out the mensuration of a plurality of parallel samples, increased operation like this Strength; 3) It is difficult to completely decompose the sample, and the remaining solid slag may affect the judgment of color

Method used

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  • Method for quickly determining vanadium in coal mine containing scherbinaite
  • Method for quickly determining vanadium in coal mine containing scherbinaite
  • Method for quickly determining vanadium in coal mine containing scherbinaite

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1 will be taken from the stone coal mine (recorded as 1#) of a certain place in Hunan to carry out the mensuration of vanadium:

[0022] (1) Ore sample pretreatment and ore sample dissolution: the stone coal ore was crushed and finely ground until its particle size passed through a 200-mesh sieve, and then dried in an oven at 105°C for 2 hours. Take 5g of the dried ore sample in a plastic cup, gradually add 2mL of analytically pure hydrofluoric acid, and after leaching for 1 hour at room temperature, move all the ore pulp into a beaker, add 4mL of sulfuric acid (1+1), and leaching for 3 hours at 95°C. , filtered and washed while hot, and the volume of the filtrate was constant to 100mL;

[0023] (2) Drugs and reagents:

[0024] Sulfuric acid (analytical pure);

[0025] Sulfuric acid (1+1): prepared by mixing 1 volume of sulfuric acid with 1 volume of water;

[0026] Sulfuric acid (5+95): prepared by mixing 5 volumes of sulfuric acid with 95 volumes of wate...

Embodiment 2

[0046] Embodiment 2 (the preparation of medicine and reagent is the same as embodiment 1)

[0047] The stone coal mine (denoted as 2#) taken from a certain place in Guizhou was crushed and finely ground until its particle size passed through a 200-mesh sieve. It was dried in an oven at 105°C for 3 hours, and 10 g of the ore sample was taken in a plastic cup. Gradually add 4mL of analytically pure hydrofluoric acid, stir and leach for 2h at room temperature, add 5mL of sulfuric acid (1+1), and leach for 4h at 95°C, filter and wash while hot, and make the volume of the filtrate to 100mL. Take 1mL of the filtrate into a 300mL Erlenmeyer flask, and rinse the inner wall of the bottle with a small amount of water. Add 20mL of sulfuric acid (1+1), 5mL of phosphoric acid (1+1), dilute with water to about 100mL, place to cool, add 5mL of ferrous sulfate, wait for 2min, add potassium permanganate dropwise under artificial shaking conditions until the solution turns red , wait for 5 min...

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Abstract

The invention discloses a method for quickly determining vanadium in a coal mine containing scherbinaite. The invention has the following advantages that: (1) compared with the current widely-used method of sodium dioxide decomposition and ferrous ammonium sulphate titrating solution titration, the method for quickly determining vanadium only needs to lixiviate a sample ore at a lower temperatureinstead of decomposing the sample ore at a high temperature, and has the advantages of less time consumption and simple operation; (2) compared with the current widely-used method of sodium dioxide decomposition and ferrous ammonium sulphate titrating solution titration, the method for quickly determining vanadium requires a large number of samples, and the determined result can better reflect thereal quality of vanadium in a coal mine containing scherbinaite; and (3) the solution to be determined contains no solid matter, and therefore, colors can be clearly and definitely judged.

Description

technical field [0001] The invention relates to a method for rapidly determining vanadium in vanadium-containing stone coal mines. Background technique [0002] Vanadium-bearing stone coal mine is the main vanadium-containing resource exploited as a single vanadium deposit in my country, V 2 o 5 The grade is low, generally around 1.0%. The vanadium in stone coal is mainly V(III), some V(IV), and rarely V(V). Since V(III) and Al(III) have similar ionic radii, similar electronegativity, and the same chemical properties of coordination numbers, V(III) mainly replaces part of Al(III) into six-coordinated aluminum In the oxygen octahedral structure, it exists in the form of isomorphism, forming vanadium-containing hydromica K(Al, V) 2 AlSi 3 o 10 (OH) 2 . [0003] Rapid and accurate determination of vanadium grade in vanadium-bearing stone coal is of great significance to the development of the industry of vanadium extraction from stone coal, but there is no international...

Claims

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Application Information

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IPC IPC(8): G01N31/22G01N31/16G01N1/28
Inventor 田学达张小云杨康杨用龙陈燕波
Owner XIANGTAN UNIV
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