A low-temperature comprehensive recovery process for vanadium-titanium magnetite iron, vanadium and titanium
A vanadium-titanium-magnetite and process technology, which is applied in the low-temperature comprehensive recovery process of titanium, vanadium, vanadium-titanium-magnetite iron field, can solve the problems of high energy consumption for recycling and recovery, long process flow for titanium extraction, low titanium recovery rate, etc. , to reduce the reduction and melting temperature, improve the reduction efficiency, and avoid the use of flux
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Embodiment 1
[0052] Sichuan Chuanwei vanadium-titanium magnetite iron concentrate, TFe content is 55%, TiO 2 Content 11.86%, V 2 O 5 Content 0.54%, SiO 2 Content 5.73%, Al 2 O 3 The content is 2.65%. The iron concentrate, Na 2 CO 3 And graphite powder in proportion to prepare carbon-containing composite pellets, where Na 2 CO 3 As a sodiumizing agent, graphite powder as a carbonaceous reducing agent, Na in the carbon-containing composite pellets 2 CO 3 The mass fraction of graphite powder is 23%, and the mass fraction of graphite powder is 12%.
[0053] After the carbon-containing composite pellets are dried, they are kept in a corundum crucible at 1250°C for 120 minutes to carry out the carbothermal sodiumization reduction reaction. After the holding time is reached, the crucible is taken out and cooled. The sample after carbothermic sodium reduction has slag and iron melting phenomenon, the yield of iron reaches 90%, the titanium content in the molten iron is less than 0.1%, the vanadium con...
Embodiment 2
[0057] The source of the vanadium-titanium magnetite and the content of each component and the preparation method of the sample are the same as in Example 1.
[0058] The carbon-containing composite pellets are kept in a corundum crucible at 1200℃ for 120 minutes to separate the slag and iron. After the holding time is reached, the corundum crucible is taken out and cooled. After the separation of the slag and iron, the yield of iron reaches 86%, and the vanadium content in the molten iron is 0.33% The above-mentioned carbon-containing composite pellets are kept in a corundum crucible at 1300℃ for 120 minutes to separate slag and iron. After the holding time is reached, the corundum crucible is taken out and cooled. After the separation of slag and iron, the iron recovery rate reaches 92%, and the vanadium content in the molten iron is 0.49 %; The above-mentioned carbon-containing composite pellets are kept in a corundum crucible at 1350℃ for 120 minutes to separate slag and iron....
Embodiment 3
[0061] The source of the vanadium-titanium magnetite and the content of each component and the preparation method of the sample are the same as in Example 1.
[0062] The carbon-containing composite pellets were kept in a corundum crucible at 1150°C for 60 minutes to carry out carbothermal sodium reduction. After the holding time was reached, the corundum crucible was taken out to cool, crushed and ground, hydrolyzed in deionized water at 50°C for 30 minutes, and filtered. The iron mixture is subjected to magnetic separation to obtain 91-94% grade iron concentrate, the yield of iron is 96%, the metallization rate is 96%, the sulfur and phosphorus content of the iron concentrate is less than 0.005%, and the magnetic Choose hydrolysis residue.
[0063] The magnetic separation hydrolyzed residue is mixed with 5% dilute hydrochloric acid at a liquid-solid ratio of 15:1, then acid leached for 60 minutes, then boiling for 60 minutes, and then cooled and separated to obtain an acid hydrol...
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