Composite additive for vanadium-titanium magnetite reduction

A composite additive, vanadium-titanium magnetite technology, applied in the field of composite additives for the reduction of vanadium-titanium magnetite, can solve the problems of low nucleation speed and grain growth speed, narrow catalyst action range, long process, etc., to achieve High nucleation speed and growth speed, reduced regrinding and pelletizing process, and improved purity

Inactive Publication Date: 2005-07-20
梅卫东
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method has the following disadvantages: ① single NaCl catalyst, its catalytic action occurs above 900 ° C, when the reduction temperature is 1000 ° C, the iron grains are very small, and at 1100 ° C, the iron grains grow to 0.15 ~ 0.03mm , the range of action of the catalyst is narrow; ②During the reduction process, the lattice difference between FeO and Fe is

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0036] Example 1:

[0037] Take -40 mesh iron powder 22Kg, NaCO 3 30Kg, CaO 25Kg, and carbon powder 25Kg are mixed evenly as additives, and then mixed with 410Kg of iron concentrate as raw materials, put into a reduction furnace and reduced with hydrogen at 1150 degrees for 2 hours. After cooling to 50 degrees, it can be crushed and magnetically separated to obtain iron powder and vanadium-titanium slag.

Example Embodiment

[0038] Example 2:

[0039] Take -60 mesh iron powder 50Kg, NaCO 3 50Kg, CaO 47Kg, charcoal powder 40Kg, mixed evenly as additives, and then mixed with 625Kg iron ore concentrate as raw materials, put into a reduction furnace and reduced by hydrogen at 1150 degrees for 2 hours. After cooling to 50 degrees, it can be crushed and magnetically separated to obtain iron powder and vanadium-titanium slag.

Example Embodiment

[0040] Example 3:

[0041] Take -100 mesh iron powder 50Kg, NaCO 3 50Kg, CaO 45Kg, charcoal powder 45Kg, mixed evenly as additives, and then mixed with 950Kg iron concentrate as raw materials, put into a reduction furnace and reduced by hydrogen at 1150 degrees for 2 hours. After cooling to 50 degrees, it can be crushed and magnetically separated to obtain iron powder and vanadium-titanium slag.

[0042] When the composite additive of the present invention is used to process one ton of vanadium-titanium iron concentrate with iron grade of 53% and titanium dioxide grade of 12%, 450 kg of primary reduced iron powder with grade greater than 94% can be received, and 110 kg of primary reduced iron powder with grade greater than 70% can be received. Titanium dioxide and vanadium-titanium slag with a grade of more than 1% vanadium pentoxide.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention discloses one kind of reducing composite additive for V-Ti magnetite. The composite additive comprises iron powder 20-28 wt%, NaCO3 25-35 wt%, CaO 20-25 wt%, and carbon process 20-25 wt%. Using the composite additive can result in the effects of: relaxing the granularity requirement to iron concentrate, reducing the milling and pelletizing steps, raising the nucleus forming speed and growing speed of iron, reducing the content of iron silicate and raising the purity of iron powder. The present invention is suitable for in industrial production.

Description

technical field [0001] The invention relates to a composite additive for reducing vanadium-titanium magnetite. Background technique [0002] One of the raw materials of reduced iron powder for powder metallurgy is iron concentrate, which requires the grade of iron to be greater than 70%, silicon dioxide to be less than 0.25%, and a monomeric structure. Since the vanadium-titanium magnetite contains ilmenite and ilmenite spinel distributed in a network shape, the iron grade of the concentrate in the mechanical separation industry is 53% to 57%, and the existing technology cannot be directly produced for powder metallurgy. Iron powder. [0003] According to the book "Ore Dressing Test Research and Industrialization" written by Zhu Junshi published by Metallurgical Industry Press, the laboratory uses anthracite as reducing agent for vanadium-titanium magnetite with iron content of 56.87%, and 15% to 20% NaCl as additive. It is reduced in a closed crucible at 1100 degrees, and...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B22F9/02C22B5/12
Inventor 梅卫东
Owner 梅卫东
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap