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Removal method of silicon in acidic vanadium-rich liquid and preparation method of vanadium oxide

A vanadium-rich solution and acidic technology, applied in the field of iron and steel smelting, can solve problems such as difficult application, and achieve the effect of simple production method, low price and good adsorption effect

Active Publication Date: 2017-08-25
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The first technical problem to be solved by the present invention is to provide a kind of defect that can overcome the existing method for removing silicon from vanadium-containing silicon solution, which is difficult to be applied to acidic vanadium-containing silicon solution system. Method for removing silicon from vanadium solution

Method used

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Examples

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preparation example Construction

[0046] The preparation method of vanadium oxide of the present invention comprises the following steps:

[0047] 1. Remove impurity silicon in the vanadium-rich solution according to the above-mentioned method for removing silicon in the acidic vanadium-rich solution;

[0048] ②. Heating the vanadium-rich solution from which silicon was removed in step ①, adding a vanadium-precipitating agent to deposit, filtering, washing, drying, and calcining according to the conventional method to obtain vanadium oxide.

Embodiment 1

[0051] a. Raw material preparation: Wash and purify bentonite raw ore, dry, crush, sieve with a sieve, select powder materials with a particle size of <10um, and mix 5% aluminum flocculant, 40% bentonite, chlorinated Sodium 55%, mixed to obtain a mixture;

[0052] B, granulation: according to the weight ratio, the mixture obtained in step a: PP=40:60, mix, extrude granulation in twin-screw extruder, obtain granulation flocculation adsorbent;

[0053] c. Pore formation: Soak the granulated flocculation adsorbent obtained in step b in deionized water for 90 hours, and then dry it in a vacuum oven at 80°C for 24 hours to obtain a porous flocculation adsorbent;

[0054] d. Removal of silicon: Add the porous flocculation adsorbent prepared in step c to the solid-liquid ratio of 1:45, add vanadium-enriched liquid, stir at low speed and room temperature for 1.5 hours, let stand for 8 hours, filter, and take out the flocculation adsorbent.

[0055] Before the experiment, the silicon ...

Embodiment 2

[0057] a. Raw material preparation: Wash and purify bentonite raw ore, dry, crush, sieve with a sieve, select powder materials with a particle size of <10um, and mix 10% aluminum flocculant, 35% bentonite, chlorinated Sodium 55%, mixed to obtain a mixture;

[0058] B, granulation: according to the weight ratio, the mixture obtained in step a: PP=50:50 is mixed, extruded and granulated in a twin-screw extruder to obtain granulated flocculation adsorbent;

[0059] c. Pore formation: Soak the granulated flocculation adsorbent obtained in step b in deionized water for 80 hours, and then dry it in a vacuum oven at 120° C. for 10 hours to obtain a porous flocculation adsorbent;

[0060] d. Removal of silicon: Add the porous flocculation adsorbent prepared in step c to the solid-liquid ratio of 1:55, add vanadium-enriched liquid, stir at low speed and room temperature for 80mim, let stand for 7h, filter, and take out the flocculation adsorbent.

[0061] Before the experiment, the si...

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Abstract

The invention belongs to the field of steel smelting and particularly relates to a method for removing silicon impurities in acid vanadium-enriched liquid and a preparation method of high-purity vanadium oxide. The method for removing silicon in the acid vanadium-enriched liquid comprises the following steps that by weight, 5-25% of an aluminum-type-flocculant, 20-50% of bentonite and 25-75% of an addition agent are mixed to obtain a mixture; a binding agent and the mixture are mixed according to the weight ratio of 80-60:20-40 for pepeletizing, the mixture is soaked in water and dried to form a porous flocculation adsorbing agent, the porous flocculation adsorbing agent is added into the vanadium-enriched liquid according to the solid-liquid rate of 1:40-60 for stirring and standing, and the flocculation adsorbing agent is taken out to obtain the adsorbing agent. The method can be directly implemented on the acidic condition and meanwhile the problem that solid-liquid separation is hard during existing flocculation silicon removal can be solved. The obtained adsorbing agent is low in price, simple in production method, good in adsorbing effect and capable of being continuously and repeatedly used.

Description

technical field [0001] The invention belongs to the field of iron and steel smelting, and in particular relates to a method for removing impurity silicon in acidic vanadium-rich liquid and a method for preparing high-purity vanadium oxide. Background technique [0002] Vanadium is an important strategic material. With the development of science and technology, the application fields of vanadium continue to expand, and the requirements for the purity of vanadium products are also getting higher and higher. The new processes for extracting vanadium are different, but the general process steps basically include five operations including roasting, leaching, separation and purification, precipitation, and calcination. The vanadium-containing solution obtained by leaching with various processes needs to go through Purification treatment, the presence of impurities affects the subsequent vanadium deposition, and seriously affects product quality. There are many kinds of vanadium p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/24C22B34/22
CPCY02P10/20
Inventor 李道玉蒋仁贵毛凤娇彭穗汪南方陈文龙曹敏龙秀丽刘波韩慧果陈勇
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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