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Method for producing direct reduced iron and titanium nitride carbide from titanium magnetite concentrate

A technology of titanium magnetite and titanium nitrogen carbide, which is applied in the direction of fluidized bed furnace, furnace, furnace type, etc., can solve the problems of large environmental pollution, harsh synthesis conditions, high production cost, etc., and achieve wide source of raw materials and high product value , Environmentally friendly effect

Active Publication Date: 2019-01-01
山东龙佰钛业科技有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both physical vapor deposition and chemical vapor deposition require pure titanium as raw material, and the synthesis conditions are harsh, so the production cost is high
[0004] In view of the difficulty, high cost, and high environmental pollution of recovering titanium products from titanium slag smelted in titanium magnetite blast furnaces, some researchers used titanium magnetite and coal as raw materials to synthesize Fe-TiC(N) by thermal carbon reduction process. Composite materials, but such materials have high impurity content and are difficult to apply

Method used

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  • Method for producing direct reduced iron and titanium nitride carbide from titanium magnetite concentrate

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Experimental program
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Effect test

Embodiment 1

[0023] The grade of a titanium magnetite concentrate is TFe 57.31%, TiO 2 11.23%, of which the iron-bearing minerals are mainly titanomagnetite and a small amount of ilmenite, and basically do not contain other gangue minerals.

[0024] Weigh and mix titanomagnetite concentrate: anthracite: water glass according to the mass ratio of 100:22:3, then add water to the disc pelletizer to form carbon-containing pellets, and dry the carbon-containing pellets at 105°C , and then put it into a graphite crucible and cover it for protection. When the temperature of the muffle furnace was raised to 1300°C, the graphite crucible was put into the furnace for 90 minutes of calcination, and after the calcination was completed, the crucible was taken out and cooled naturally at room temperature. Grind the pellets after roasting, the grinding fineness is -0.074㎜, accounting for 80%. The recoveries were 96.42%, respectively. The magnetic separation tailings are titanium-rich slag, which is so...

Embodiment 2

[0026] The grade of a titanomagnetite concentrate is TFe 60.54%, TiO 2 6.98%, of which the iron-containing minerals are mainly titano-magnetite and a small amount of ilmenite, and basically do not contain other gangue minerals.

[0027] Titanium magnetite concentrate: carbonaceous reducing agent: additive: binder is weighed and mixed according to the mass ratio of 100:28:8:5, and then mixed with 12% water. The composition of the carbonaceous reducing agent is anthracite: bituminous coal: activated carbon: coke: semi-coke: petroleum coke: graphite The mass ratio is 40:10:10:10:10:10:10, anthracite, bituminous coal, activated carbon, coke, semi-coke , petroleum coke and graphite are all industrial products; the additive composition is calcium hydroxide: potassium carbonate: sodium sulfate: sodium carbonate: sodium sulfate: calcium fluoride: sodium borate mass ratio is 10:15:10:10:15:15: 10. Calcium hydroxide, potassium carbonate, potassium sulfate, sodium carbonate, sodium sulf...

Embodiment 3

[0029] The grade of a titanium magnetite concentrate is TFe 47.87%, TiO 2 19.01%, of which the iron-containing minerals are mainly titano-magnetite and a small amount of ilmenite, and basically do not contain other gangue minerals.

[0030]Titanium magnetite concentrate: carbonaceous reducing agent: additive: binder is weighed and mixed according to the mass ratio of 100:18:9:5. The composition of the carbonaceous reducing agent is anthracite: bituminous coal: activated carbon: coke: semi-coke: petroleum coke: graphite The mass ratio is 50:5:15:5:15:5:5, anthracite, bituminous coal, activated carbon, coke, semi-coke , petroleum coke and graphite are all industrial products; the additive composition is calcium hydroxide: potassium carbonate: sodium sulfate: sodium carbonate: sodium sulfate: calcium fluoride: sodium borate mass ratio is 8:20:15:5:20:10: 22. Calcium hydroxide, potassium carbonate, potassium sulfate, sodium carbonate, sodium sulfate, calcium fluoride, and sodium ...

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Abstract

The invention provides a method for producing direct reduction iron and titanium nitride (carbide) by titanomagnetite concentrates, and belongs to the technical field of resource utilization. The method comprises the following steps: after pelletizing or pressing the titanomagnetite concentrates, a carbonaceous reducing agent, an additive and an adhesive into balls in a mixing manner, carrying out reduction roasting at the temperature of 1,200-1,500 DEG C to obtain a roasted product of which the main ingredients comprise the direct reduction iron and the titanium nitride (carbide); grinding the roasted product, then separating to obtain two products including a direct reduction iron product and titanium-enriched slag, and carrying out acid pickling on the titanium-enriched slag to obtain a high-purity titanium nitride (carbide) product. By the process, valuable components in titanomagnetite are comprehensively utilized in an environment-friendly manner. The method has the advantages of extensive sources of raw materials, short technological process, low cost and high added value of products. Finally, the direct reduction iron product of which the iron recovery rate is greater than 90% and the iron grade is greater than 90% and the titanium nitride (carbide) product of which the recovery rate is greater than 90% and the purity is greater than 99% are obtained.

Description

technical field [0001] The invention relates to the technical field of resource utilization, in particular to a method for producing direct reduced iron and titanium nitrogen carbide with titanomagnetite concentrate. Background technique [0002] Titano-magnetite is an important iron ore resource, but the smelting of titano-magnetite concentrate is a difficult problem in the world. After decades of technological research, my country has achieved technological breakthroughs. At present, it has formed the "blast furnace ironmaking-converter Steelmaking" titanium magnetite industrial production process. However, this process is dominated by steel production, and titanium is enriched in blast furnace slag, but due to TiO 2 The content is low (less than 25%), the phase is complex, and there is no mature process to deal with it, so the precious titanium resources are greatly wasted. In addition, a large amount of blast furnace titanium slag is piled up, occupying a large amount o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B13/00C22B1/02C22B3/06C22B34/12
CPCC21B13/00C22B1/02C22B3/06C22B34/124
Inventor 陈江安余文邱廷省温孝进田跃超傅佳丽黄伟秦
Owner 山东龙佰钛业科技有限公司
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