Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Direction reduction and electric furnace smelting-separation preparation process of vanadium-titanium magnetite cold bound pellet

A technology of vanadium-titanium magnetite and production method, which is applied in the field of preparation of cold-consolidated carbon-containing pellets of vanadium-titanium-magnetite, and can solve the problem of low drying temperature and preheating burst of cold-consolidated carbon-containing pellets Reduction time, high C/Fe ratio, etc., to achieve the effect of greatly reducing pollution, reducing the overall cost of the product, and achieving good results

Inactive Publication Date: 2009-10-21
鲜帆 +2
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The method of the present invention is to comprehensively utilize iron, vanadium, titanium, and chromium in vanadium-titanium magnetite, economically obtain reducing agent resources, and solve the problem of low drying temperature, poor drop strength, and medium-high temperature preheating burst of cold-consolidated carbon-containing pellets And the reduction time is long, the C / Fe ratio is high, the energy consumption is big and the utilization rate is low etc., propose the production method that the present invention is suitable for industrialized operation

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Direction reduction and electric furnace smelting-separation preparation process of vanadium-titanium magnetite cold bound pellet
  • Direction reduction and electric furnace smelting-separation preparation process of vanadium-titanium magnetite cold bound pellet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 This scheme is implemented in the coke oven gas comprehensive utilization project in Panzhihua, Sichuan. -200 mesh 55% vanadium-titanium magnetite concentrate (red grid ore: V 2 o 5 0.67%, Cr 2 o 3 : 1.3%, TiO 2 12.5%), -200 mesh 70% anthracite fine coal powder, -200 mesh 99% high-efficiency bentonite, -180 mesh 50% humate, respectively in proportions of 76.0%, 22.25%, 1.0%, and 0.75%. After mixing and grinding, the batch materials enter the pelletizing machine to form 12mm cold-solidified carbon-containing pellets. Before pelletizing, the moisture content of the material is 7.5%, the moisture content of the pellets is 9.5%, and the C / Fe ratio of the pellets is 0.39. The drying temperature of the cold-consolidated carbon-containing pellets is 300°C, the preheating temperature is 980°C, the reduction temperature is 1250°C, the preheating-reduction time is 80 minutes, the metallization rate of the reduced pellets is 93.0%, and the residual carbon content is ...

Embodiment 2

[0018] Example 2 This scheme is implemented in the coke oven gas comprehensive utilization project in Panzhihua, Sichuan. -200 mesh 65% vanadium-titanium magnetite concentrate (Panzhihua Miyi Baima ore, chrome-free, V 2 o 5 0.78%, TiO 210%) and -180 mesh 70% anthracite clean coal powder and -200 mesh more than 99% high-efficiency bentonite, -180 mesh 50% humate in proportions of 76.5%, 22%, 1.0%, and 0.5% respectively. After mixing and grinding, the batch materials enter the pelletizing machine to form 10mm cold-solidified carbon-containing pellets. The moisture content of the material before pelletizing is 7.0%, the moisture content of the pellets is 9.5%, and the C / Fe ratio of the pellets is 0.38. The drying temperature of the cold-consolidated carbon-containing pellets is 500°C, the preheating temperature is 1050°C, the reduction temperature is 1225°C, the preheating-reduction time is 90 minutes, the metallization rate of the reduced pellets is 95.0%, and the residual car...

Embodiment 3

[0019] Example 3 This scheme is implemented in the coke oven gas comprehensive utilization project in Panzhihua, Sichuan. -200 mesh 70% vanadium-titanium magnetite concentrate (Panzhihua Miyi Baima ore, chromium-free, V 2 o 5 0.83%, TiO 2 8.0%) and -200 mesh 40% titanium concentrate (TFe34%, TiO 2 47.5%), -180 mesh 70% lean lean fine coal powder, -180 mesh 70% anthracite fine coal powder, -200 mesh 99% or more high-efficiency bentonite, -180 mesh 50% humate by 58% , 20%, 10%, 10.5%: 0.75%, 0.75% ratio ingredients. After mixing and grinding, the batch materials enter the pelletizing machine to form 14mm cold-solidified carbon-containing pellets. The moisture content of the material before pelletizing is 7.0%, the moisture content of the pellets is 9.5%, and the C / Fe ratio of the pellets is 0.37. The drying temperature of the cold-consolidated carbon-containing pellets is 600°C, the preheating temperature is 890°C, the reduction temperature is 1200°C, the preheating-reductio...

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of environmental protection and comprehensive utilization of ironmaking in the metallurgical industry. It is especially suitable for the preparation of cold-solidified pellets of vanadium-titanium magnetite and the production methods of direct reduction and electric furnace melting. The production method proposed by the present invention is characterized in that the vanadium-titanium magnetite concentrate, the reducing agent and the binder are mixed, dried, moistened and pelletized to obtain cold-consolidated carbon-containing pellets, and cold-consolidated carbon-containing pellets After drying and screening, the pellets enter the reduction furnace, and the reduced pellets enter the electric furnace directly in the hot state to melt the molten iron and the electric furnace slag enriched in heavy metals such as vanadium, titanium and chromium. The method of the present invention is applicable to the preparation of vanadium-titanium-magnetite concentrates with wide operating temperature, low C / Fe and low energy consumption, and has the advantages of good direct reduction effect, electric furnace melting and extraction of vanadium, titanium, iron and chromium It has the characteristics of high yield, simple preparation process, low equipment operation cost, remarkable water saving and environmental protection effects, and the like.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of environment-friendly ironmaking in the metallurgical industry. It is especially suitable for the preparation of vanadium-titanium-magnetite cold-solidified carbon-containing pellets and the production methods of direct reduction and electric furnace melting. The method is a production method for vanadium-titanium-magnetite composite ore by adopting pelletizing, direct reduction and extraction of metals such as vanadium, titanium, iron and chromium. Background technique [0002] China's iron ore resources are mainly concentrated in Anshan, Hebei, and Panxi. The vanadium-titanium magnetite resource in Panxi area is a strategic resource in China. China's total titanium resources account for 38.85% of the world's total, of which 90.3% are in the Panxi area. 98% of the world's vanadium resources exist in the form of vanadium-titanium magnetite, and China's total vanadium resourc...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/24C21B13/12
Inventor 鲜帆杨定国孙建坤
Owner 鲜帆
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com