Process for comprehensively utilizing vanadium-titanium magnetite

A vanadium-titanium magnetite and process technology, applied in the field of comprehensive utilization of vanadium-titanium magnetite, to achieve the effects of low production cost, low energy consumption and high grade

Active Publication Date: 2016-09-28
WUHAN COSRED SCI & TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention aims at the deficiencies of the prior art, proposes a kind of processing technology of comprehensive utilization of vanadium-titanium magnetite, solves the problem of vanadium-titanium magnetite economy, high added value, large-scale industrialization utilization

Method used

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  • Process for comprehensively utilizing vanadium-titanium magnetite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment one: the method that high added value utilizes vanadium-titanium magnetite, its steps are:

[0023] (1) The raw ore of vanadium-titanium magnetite is crushed, tailed, finely ground, weak magnetic separation, strong magnetic separation, shaking table separation to obtain high vanadium iron concentrate;

[0024] (2) Add 2.0% binder (starch and cellulose mixed at a ratio of 0.7:0.3) to the high-vanadium iron concentrate powder, mix and make pellets, air-dry, and add high-vanadium iron concentrate to the outside 40% of the powder weight is mixed with coal powder (3) the mixed material is reduced in a coal-based shaft furnace through cloth to obtain sponge iron, the reduction temperature is 880 ° C, the reduction time is 18 hours, and the metallization rate of the reduction product is 90%;

[0025] (4) The obtained sponge iron is heated at 1000°C for 0.5h in a power frequency electric furnace with a weak reducing atmosphere, and then heated to above 1500°C for mel...

Embodiment 2

[0027] Embodiment two: the method that high added value utilizes vanadium-titanium magnetite, its steps are:

[0028] (1) The vanadium-titanium magnetite raw ore is crushed, tailed, finely ground, weak magnetic separation, strong magnetic separation, shaking table separation to obtain high vanadium iron concentrate;

[0029] (2) Add 1.5% binder (starch and cellulose mixed at a ratio of 0.5:0.5) to the high-vanadium iron fine powder and mix it into pellets, air-dry, and add high-vanadium iron fine powder Mix 30% coal powder of powder weight;

[0030] (3) Reducing the mixed material through cloth in a coal-based shaft furnace to obtain sponge iron, the reduction temperature is 1000°C, the reduction time is 15 hours, and the metallization rate of the reduction product is 91.3%;

[0031] (4) The obtained sponge iron is heated at 1000°C for 40 minutes in an intermediate frequency electric furnace with a weak reducing atmosphere, and then heated to above 1500°C for melting, and van...

Embodiment 3

[0033] Embodiment three: high added value utilizes the method for vanadium-titanium magnetite, and its steps are:

[0034] (1) The vanadium-titanium magnetite raw ore is crushed, tailed, finely ground, weak magnetic separation, strong magnetic separation, shaking table separation to obtain high vanadium iron concentrate;

[0035] (2) Add 3.0% binder (starch and cellulose mixed at a ratio of 0.8:0.2) to the high-vanadium iron fine powder and mix it into pellets, air-dry, and add high-vanadium iron fine powder 55% pulverized coal by powder weight;

[0036] (3) Reducing the mixed material through cloth in a coal-based shaft furnace to obtain sponge iron, the reduction temperature is 1060° C., the reduction time is 13 hours, and the metallization rate of the reduction product is 92%;

[0037] (4) The obtained sponge iron is heated in an intermediate frequency electric furnace with a weak reducing atmosphere at 1050°C for 30 minutes and then heated to above 1500°C for melting and ...

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Abstract

The invention relates to a process for treating and comprehensively utilizing a vanadium-titanium magnetite. The process is characterized by comprising the following steps: (1) treating a raw vanadium-titanium magnetite by crushing, tailings discarding, fine grinding, low-intensity magnetic separating, high-intensity magnetic separating, and separating by a shaking table, so as to obtain a titanium concentrate and a high-vanadium-ferrum concentrate; (2) adding an adhesive to the high-vanadium-ferrum concentrate; uniformly mixing and pelletizing; drying; uniformly mixing with pulverized coal or coke powder; distributing; performing controlled reduction that V is not reduced through a coal based shaft furnace so as to obtain sponge iron, wherein the amount of used reducing agents such as the pulverized coal is 30 to 70% of the weight of high-vanadium-ferrum concentrate powder, and the reduction is performed for 10 to 18 hours at the temperature of 850 to 1060 DEG C; (3) heating the obtained sponge iron for 0.5 to 1.0 hour at the temperature less than 1050 DEG C through an intermediate frequency/ main frequency furnace under a weak reduction atmosphere; then heating until the temperature is more than 1500 DEG C; performing melt separation to enable vanadium to enter slag, thus obtaining high-grade vanadium slag and high-purity molten iron. With the adoption of the process, a plurality of valuable elements in the vanadium-titanium magnetite can be effectively separated and utilized with high additional value.

Description

technical field [0001] The invention relates to a process for comprehensive utilization of vanadium-titanium magnetite. Background technique [0002] At present, the non-blast furnace treatment methods of vanadium-containing titano-magnetite are roughly as follows: [0003] Coal-based fluidized bed reduction + electric furnace melting, for example, the patent application number CN201110027410.1 discloses a method for reducing vanadium-titanium-magnetite powder in a coal-based reducing gas-fluidized bed, and the high temperature produced by the coal-based reducing gas system The coal gas is mixed with the gas from the reducing exhaust gas purification system to form a reducing gas, which enters the third, second and first reduction fluidized beds in sequence; the preheated vanadium-titanium magnetite powder enters the first, second and third stages in turn. The stage reducing fluidized bed realizes fluidization and reduction reaction under the action of reverse upward reduci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/244C22B1/00C21B13/02C22B34/22C22B34/12
CPCC21B13/006C21B13/02C22B1/00C22B1/244C22B34/1204C22B34/22
Inventor 李森蓉李雄
Owner WUHAN COSRED SCI & TECH LTD
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