Method for decomposing titanium-containing blast-furnace slag through fused salt

A technology of blast furnace slag and blast furnace titanium slag, which is applied in the fields of hydrometallurgy and metal oxide preparation, can solve the problems of low titanium leaching rate, secondary pollution, and small processing capacity, so as to avoid secondary pollution and reduce production capacity The effect of reducing consumption and slag discharge

Inactive Publication Date: 2011-10-12
NORTHEASTERN UNIV
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problems of secondary pollution, high energy consumption, and small processing capacity in the existing titanium-containing blast furnace

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
  • Method for decomposing titanium-containing blast-furnace slag through fused salt
  • Method for decomposing titanium-containing blast-furnace slag through fused salt
  • Method for decomposing titanium-containing blast-furnace slag through fused salt

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1:

[0026] The titanium-containing blast furnace slag with a particle size of less than 0.074mm and NaOH+NaF were uniformly mixed, and reacted at 500 ° C for 4 hours, wherein the mass ratio of NaOH and titanium-containing blast furnace slag was 4:1, and the molar ratio of NaOH:NaF was 4 : 1, a solid mesophase is obtained after the reaction, and the XRD pattern of the solid mesophase is shown in the attached figure 2 shown;

[0027] The solid intermediate phase was washed with water, the washing temperature was 60 °C, and the washing solid-liquid mass ratio was 1:20. The XRD spectrum of the product after washing was shown in the attached image 3 Shown, all generate amorphous phase; Then the product after washing is carried out suction filtration, the obtained solid phase is the solid intermediate product containing Ti and impurities Fe, Ca and Mg, and the filtrate is containing NaOH, NaF and impurities Si, Mixed lye of Al and Mn;

[0028] To the obtained mi...

Example Embodiment

[0031] Example 2:

[0032] The titanium-containing blast furnace slag with a particle size of less than 0.074mm and NaOH+NaF were uniformly mixed, and reacted at 200 ° C for 10 hours, wherein the mass ratio of NaOH and titanium-containing blast furnace slag was 10:1, and the molar ratio of NaOH:NaF was 10 : 1, obtain solid intermediate phase after reaction;

[0033] The solid intermediate phase was washed with water, the washing temperature was 60°C, and the solid-liquid mass ratio of the washing was 1:20; then the washed product was subjected to suction filtration, and the obtained solid phase was a solid intermediate product containing Ti and impurities Fe, Ca and Mg , the filtrate is a mixed alkali solution containing NaOH, NaF and impurities Si, Al and Mn;

[0034] To the obtained mixed lye solution containing NaOH, NaF and impurities Si, Al and Mn, add CaO according to the mass ratio of calcium to silicon: (1-3), convert Si and Al into insoluble aluminosilicate, remove b...

Example Embodiment

[0037] Example 3:

[0038] The titanium-containing blast furnace slag with a particle size of less than 0.074mm and NaOH+NaF are uniformly mixed, and reacted at 700 ° C for 1 hour, wherein the mass ratio of NaOH and titanium-containing blast furnace slag is 1:1, and the molar ratio of NaOH:NaF is 1 : 1, obtain solid intermediate phase after reaction;

[0039] The intermediate phase was washed with water, the washing temperature was 70°C, and the solid-liquid mass ratio of the washing was 1:30; then the washed product was subjected to suction filtration, and the obtained solid phase was a solid intermediate product containing Ti and impurities Fe, Ca and Mg, The filtrate is a mixed alkali solution containing NaOH, NaF and impurities Si, Al and Mn;

[0040] To the obtained mixed lye solution containing NaOH, NaF and impurities Si, Al and Mn, add CaO according to the mass ratio of calcium to silicon: (1-3), convert Si and Al into insoluble aluminosilicate, remove by filtration, ...

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 invention relates to the field of metallurgy and resource comprehensive utilization, in particular to a method for decomposing titanium-containing blast-furnace slag through fused salt, which has the advantages of environment friendliness, low pollution and high efficiency. The method comprises the following steps of: by taking the titanium-containing blast-furnace slag as the raw material; after ball-milling, reacting the titanium-containing blast-furnace slag with a NaOH and NaF fused salt system at 200-700 DEG C to generate a solid intermediate phase; after hydrolyzing, extraction-filtering, dissolving with acid and extraction-filtering the solid intermediate phase to obtain a metatitanic acid solution; hydrolyzing and extraction-filtering the metatitanic acid solution to obtain hydration titanium dioxide powder; and calcining the hydration titanium dioxide powder at 600-1300 DEG C to finally obtain rutile type carbon dioxide. By means of the method disclosed by the invention, alkali circulation and acid circulation in the system are realized; the production energy consumption is reduced; the production process is simplified; the equipment investment is reduced; the process operability is improved; and meanwhile, a lot of accumulated titanium-bearing blast-furnace slag is utilized; the environmental problem is solved; and the titanium resource is sufficiently utilized.

Description

technical field [0001] The invention relates to the fields of hydrometallurgy and metal oxide preparation, in particular to a green and efficient method for decomposing titanium-containing blast furnace slag by molten salt. Background technique [0002] my country has relatively large reserves of vanadium-titanium magnetite, which has been proven to be 6.19 billion tons. At present, my country has first solved the technical problem of producing pig iron by smelting high-titanium iron (vanadium) concentrates in blast furnaces, but most of the titanium-containing phases are stored in the slag phase in a very fine and dispersed state, becoming 15-containing ~25wt% titanium-containing blast furnace slag, and the massive accumulation of titanium-containing blast furnace slag has caused a large loss of titanium resources and environmental pollution. At present, in order to extract valuable elements from titanium-containing blast furnace slag, scientific and technological workers h...

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): C22B34/12C21B3/06
CPCY02W30/50
Inventor 薛向欣于洪浩
Owner NORTHEASTERN UNIV
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