Method for producing vanadium oxide

A technology of vanadium oxide and vanadium slag, which is applied in the field of vanadium oxide production, can solve the problems of large consumption of leaching agent and low concentration of vanadium-containing leaching solution, and achieve the effect of reducing reagent consumption and production cost

Inactive Publication Date: 2013-07-10
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Patent document CN201210066735 provides a vanadium extraction method for ammonium carbonate leaching vanadium slag clinker, that is, using 200-800g / L ammonium carbonate solution according to the liquid-solid ratio (mL:g) 5:1-30:1 at 60-98 ℃ for leaching, this method has the problems of large consumption of leaching agent and low concentration of vanadium-containing leaching solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0028] Put -0.1mm ordinary vanadium slag (containing V 2 o 5 17.2%, CaO1.84%, P0.04%) 100g mixed with calcium oxide 5g evenly, the mixture CaO / V 2 o 5is 0.4; the mixture is roasted in a muffle furnace for 180min at a roasting temperature of 850°C under the condition of air ventilation; the roasted clinker is crushed to -0.1mm and then added to 400mL, 8wt% sodium carbonate solution, at a slurry temperature of 90°C Stirring and leaching for 120min under certain conditions; after the leaching reaction, separate the solid and liquid to obtain the vanadium-containing leaching solution and residue, the residue TV is 0.92wt%, and the vanadium transfer leaching rate is 90.3%; add 0.8g sodium aluminate to the leaching solution, stir for 20min and then filter to obtain Filtrate; filtrate is cooled to 15 ℃, under the situation of stirring, add 37g ammonium carbonate, 1g ammonium metavanadate reaction 180min, filter after leaving standstill 12h, obtain ammonium metavanadate and vanadium...

example 2

[0031] Put -0.1mm ordinary vanadium slag (containing V 2 o 5 17.2%, CaO1.84%, P0.04%) 100g mixed with calcium oxide 3g evenly, the mixture CaO / V 2 o 5 is 0.28; the mixture is roasted in a muffle furnace at a roasting temperature of 900°C and ventilated for 60 minutes; the roasted clinker is crushed to -0.1mm and then added to 500mL, 5wt% sodium carbonate solution, at a slurry temperature of 95°C Stirring and leaching for 120min under certain conditions; after the leaching reaction, solid-liquid separation to obtain vanadium-containing leachate and residue, residue TV1.06wt%, vanadium transfer leaching rate 88.8%; add 0.8g sodium aluminate to the leachate, stir for 20min and then filter to obtain Filtrate; the filtrate was cooled to 10°C, added 25g of ammonium carbonate and 0.6g of ammonium metavanadate to react for 180min while stirring, and filtered after standing for 12h to obtain ammonium metavanadate and vanadium precipitation wastewater, vanadium precipitation wastewate...

example 3

[0034] Put -0.1mm high calcium and high phosphorus vanadium slag (containing V 2 o 5 15.7%, CaO9.53%, P0.28%, CaO / V 2 o 5 0.57) 100g was roasted for 300min in a muffle furnace at a roasting temperature of 800°C under the condition of ventilation; Stirring and leaching for 120 minutes; after the leaching reaction was completed, solid-liquid separation was carried out to obtain a vanadium-containing leaching solution and a residue, the residue TV was 0.97wt%, and the vanadium transfer leaching rate was 89.4%; 0.8 g of sodium aluminate was added to the leaching solution, and the filtrate was obtained by filtering after stirring for 20 minutes; The filtrate was cooled to 20°C, and 44g of ammonium carbonate and 1.8g of ammonium metavanadate were added to react for 180min while stirring, and then filtered after standing for 12h to obtain ammonium metavanadate and vanadium precipitation wastewater, the vanadium precipitation wastewater TV1.75g / L; Ammonium metavanadate was oxidized...

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Abstract

The invention provides a method for producing a vanadium oxide. The method comprises the following steps of: mixing vanadium slag with calcium oxide or limestone to form a mixed material; roasting the mixed material to obtain a calcified clinker; leaching the calcified clinker through 5 to 12wt% of sodium carbonate solution at 80 to 95 DEG C; separating the solid and the liquid after the leaching reaction, so as to obtain vanadium-containing liquid and residues; processing the vanadium-containing liquid in a desilicating manner, so that the silicon concentration in the vanadium-containing liquid is less than 0.1g / L; cooling the vanadium-containing leaching liquid to 10 to 20 DEG C; adding ammonium carbonate to the vanadium-containing leaching liquid; adjusting the molar ratio of NH4<+> / TV to 2.5 to 7 to precipitate ammonium metavanadate; filtering to obtain ammonium metavanadate and vanadium-precipitated wastewater; and processing ammonium metavanadate by oxidizing, roasting and deaminizing to prepare vanadium pentoxide or by reducing to prepare vanadium trioxide. By adopting the method for producing the vanadium oxide, the vanadium oxide can be prepared through general vanadium slag and high-calcium high-phosphorus vanadium slag in the premise that the environmental protection requirement is met, the agent consumption can be decreased, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of vanadium oxide production, in particular to a method for producing vanadium oxide. Background technique [0002] Usually, vanadium slag is the main raw material for producing vanadium oxide. At present, the vanadium slag used in industrial production is mainly ordinary vanadium slag, which is characterized by low CaO content, and the general CaO / V 2 o 5 ≤0.15; however, for CaO / V 2 o 5 ≥0.16, P≥0.06% high-calcium and high-phosphorus vanadium slag, because of the high content of CaO, it is not suitable to adopt the process of sodium roasting-water leaching to extract vanadium, and because of the high content of phosphorus, it is not suitable to adopt the process of calcification roasting-sulfuric acid leaching to extract vanadium, so However, the process of extracting vanadium from high-calcium and high-phosphorus vanadium slag has not yet been industrialized. [0003] There are two main industrial pro...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B34/22C01G31/02C22B3/04
CPCY02P10/20
Inventor 付自碧孙朝晖王彬彬张林赵小平卢晓林
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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