System and method for producing powdery vanadium by using chlorination process

A chlorination method and powder vanadium technology, applied in the fields of chemical industry and metallurgy, can solve the problems of low recovery rate, difficulty in rectification purification and chlorination residue treatment, and increase in production cost.

A chlorination method and powder vanadium technology, applied in the fields of chemical industry and metallurgy, can solve the problems of low recovery rate, difficulty in rectification purification and chlorination residue treatment, and increase in production cost.

CN109835951AActive Publication Date: 2019-06-04INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • System and method for producing powdery vanadium by using chlorination process
  • System and method for producing powdery vanadium by using chlorination process

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Experimental program
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Effect test

Embodiment 1

[0080] combine figure 1 , a system for producing vanadium powder by chlorination method used in this embodiment, including oxidation granulation section 1, decalcification section 2, mixing section 3, chlorination and dust collection section 4, leaching and sedimentation section 5, and refining section 6. Milling section 7 and chlorination residue treatment section 8;

[0081] Oxidation and granulation section 1 includes vanadium slag silo 1-1, vanadium slag screw feeder 1-2, oxidation granulation fluidized bed 1-3 and vanadium slag cyclone dust collection tower 1-4;

[0082] Decalcification section 2 includes decalcification stirring tank 2-1, decalcification slurry settling tank 2-2, No. 1 decalcification washing filter 2-3, decalcification evaporative crystallizer 2-4, decalcification heater 2-5 , No. 2 decalcification washing filter 2-6, No. 1 decalcification cyclone preheater 2-7, No. 2 decalcification cyclone preheater 2-8 and alkali washing tower 2-9;

[0083] Mixing ...

Embodiment 2

[0094] Adopt the system described in embodiment 1, present embodiment provides a kind of method for producing vanadium powder by chlorination, comprising the following steps:

[0095] The vanadium slag in the vanadium slag silo 1-1 enters the oxidation granulation fluidized bed 1-3 through the vanadium slag screw feeder 1-2, and undergoes an oxidation reaction with the air from the air main pipe, accompanied by particle growth; The operating temperature of oxidation granulation fluidized bed 1-3 is 400°C~1000°C; the reaction tail gas is sent to the tail gas treatment system after the dust is removed by the vanadium slag cyclone dust collection tower 1-4; The carbon dioxide-enriched distilled water from device 2-4 enters into the decalcification stirred tank 2-1 together, and carbonization reaction occurs with the carbon dioxide-enriched gas from the alkali washing tower 2-9, and the calcium oxide is converted into water-soluble carbonate; the reaction slurry The material enter...

Embodiment 3

[0099] This embodiment takes steelmaking vanadium slag as raw material, wherein the mass fraction of vanadium pentoxide is 8%, the mass fraction of calcium oxide is 2.5%, the mass fraction of phosphorus oxide is 0.1%, and the processing capacity is 1.3t / h. Oxidation granulation, decalcification treatment, mixing, chlorination dust collection, leaching and sedimentation, refining, pulverization and other processes to prepare high-purity vanadium pentoxide products, and realize industrial waste energy utilization and residue treatment through waste heat utilization and residue treatment Dechlorination treatment.

[0100]In the oxidation granulation fluidized bed 1-3, the oxidation roasting temperature is 400°C, the operating gas velocity is 0.05m / s, and the average residence time of the vanadium slag is 30min; in the decalcification section 2, the calcium decalcification The removal rate is 96%; in the fluidized bed mixer 3-5, the metallurgical coke dosage is 5% of the decalcifi...

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Abstract

The present invention discloses a system and a method for producing powdery vanadium by using a chlorination process. According to the present invention, through fluidized bed oxidative granulation treatment, the mineral phase reforming and the mineral particle growth of the vanadium residue are achieved; through calcium fixing treatment with carbon dioxide, the decalcification of the vanadium residue is achieved; the vanadium in the vanadium residue is converted into gaseous vanadium oxytrichloride through selective chlorination, and most of impurities such as iron, manganese, phosphorus, titanium, silicon and the like are remained in the chlorinated residue so as to effectively separate vanadium and other impurities; the gaseous vanadium oxytrichloride is sequentially subjected to dust removal, leaching, settlement, rectification purification, catalytic oxidation and other processes to prepare the high-purity vanadium pentoxide powder (powdery vanadium); the chlorinated residue is subjected to gas phase hydrolysis dechlorination treatment, and the dechlorination residue returns to iron making; and with the system and the method, the clean comprehensive utilization of vanadium residue is achieved while the sensible heat of the high temperature flue gas of the chlorination furnace is effectively utilized so as to achieve the purposes of energy saving and consumption reduction.

Description

technical field [0001] The invention belongs to the fields of metallurgy and chemical industry, in particular to a system and method for producing vanadium powder by chlorination. Background technique [0002] Vanadium pentoxide powder (vanadium powder) is an important metallurgical and chemical material, which has been mainly used as an additive to iron-based alloys to produce alloy steel. In recent years, with the rapid development of industrial technology, the application proportion of vanadium pentoxide in aerospace alloys, energy storage materials, petrochemical catalysts and other fields has gradually increased. In particular, the rapid development of energy storage materials (all-vanadium redox flow battery electrolyte, lithium vanadate cathode material) and high-performance aerospace alloys (vanadium-aluminum series, vanadium-titanium alloy) industry has produced high-quality and high-purity vanadium pentoxide. Huge demand. [0003] Vanadium-titanium magnetite is t...

Claims

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Application Information

Patent Timeline
04 Jun 2019
Publication
CN109835951A
IPC
C01G31/02; B01D53/86; B01D53/68
CPC
Y02P20/10; Y02P20/129; Y02P20/50
Inventors
杨海涛; 范川林