Method for preparing high-purity titanium dioxide from titanium-containing blast furnace slag

A technology for titanium dioxide and blast furnace slag, which is applied in the fields of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of high impurity content, low titanium concentration and long process, so as to improve the acid hydrolysis conversion rate and reduce the The amount of sulfuric acid and the effect of promoting hydrolysis

Active Publication Date: 2020-12-08
TSINGHUA UNIV +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the industrial titanyl sulfate solution, the heterogeneous titanyl sulfate solution obtained by this method has a low titanium concentration (Ti concentration (in terms of TiO 2 Total) 4 ):>20g/L, c(Al 2 (SO 4 ) 3 ):>20g/L), limited by normal pressure hydrol

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

[0035]Example 1

[0036]Crush and grind titanium-containing blast furnace slag, sieving through 200 meshes to remove the coarse slag on the screen; mix the sieved titanium-containing blast furnace slag, sodium lauryl sulfonate, ammonium sulfate and 95% sulfuric acid solution, and the mass ratio of each material Titanium-containing blast furnace slag: sodium dodecyl sulfonate: ammonium sulfate: 95% sulfuric acid solution=100:0.01:0.1:170, reacted at 80°C, normal pressure, and uniform mixing conditions for 2 hours to obtain an acid hydrolysis product; The acid hydrolysis product and water were mixed in a mass ratio of 1:1.5, reacted for 2 hours at 75°C and uniform stirring, and then filtered to obtain a solution containing titanyl heterosulfate; The hydrated potassium aluminum sulfate is mixed at a mass ratio of 100:0.1:0.01. The mixed solution is placed in a hydrothermal kettle and sealed. The reaction is hydrothermally reacted for 1 hour at 120°C, a pressure of 2 atm, and a stirring ra...

Example Embodiment

[0037]Example 2

[0038]Crushing and grinding titanium-containing blast furnace slag, sieving with 400 meshes to remove the coarse slag on the screen; mixing the sieving titanium-containing blast furnace slag, sodium dodecylbenzene sulfonate, ammonium chloride and 85% sulfuric acid, the quality of each material The ratio is titanium-containing blast furnace slag: sodium dodecyl sulfonate: ammonium chloride: 85% sulfuric acid=100:0.05:0.5:200, reacted for 3 hours under 120℃, normal pressure and uniform mixing conditions to obtain acid hydrolysis product ; Mix the acid hydrolysis product and water at a mass ratio of 1:2.5, react at 60°C and uniform stirring for 3 hours, and then filter to obtain a solution containing titanyl sulfate; the solution containing titanyl sulfate, potassium sulfate and aluminum Sodium is mixed at a mass ratio of 100:0.5:0.1, the mixed solution is placed in a hydrothermal kettle and sealed, and the mixture is hydrothermally reacted for 5 hours under the conditio...

Example Embodiment

[0039]Example 3

[0040]Crushing and grinding titanium-containing blast furnace slag, sieving through 350 meshes to remove the coarse slag on the screen; after screening, the titanium-containing blast furnace slag, sodium cetyl sulfonate, sodium cetyl benzene sulfonate, and ethylene diamine Acetic acid and 90% sulfuric acid are mixed, and the mass ratio of each substance is titanium-containing blast furnace slag: sodium cetyl sulfonate: sodium cetylbenzene sulfonate: 90% sulfuric acid = 100:0.1:1:180, at 100℃, React for 0.5 hours under normal pressure and uniform mixing conditions to obtain the acid hydrolysis product; mix the acid hydrolysis product and water at a mass ratio of 1:2.5, react at 75°C and uniform stirring for 2 hours, and then filter to obtain heterosulfate-containing oxygen Titanium solution; mix the solution containing titanium oxysulfate, sodium sulfate, ammonium sulfate, and polyaluminum chloride at a mass ratio of 100:0.2:0.4:0.06, and place the mixed solution in a ...

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 discloses a method for preparing high-purity titanium dioxide from titanium-containing blast furnace slag, and belongs to the technical field of chemical material preparation. The methodcomprises the following steps: by taking the titanium-containing blast furnace slag as a raw material, firstly, preparing an impurity-containing titanyl sulfate solution by a sulfuric acid enhanced acidolysis method; separating impurities and titanium-containing components by using a selective hydrothermal deposition method to prepare a metatitanic acid precursor; and calcining the metatitanic acid precursor, controlling the calcination temperature to regulate the crystal form of the product to obtain anatase or rutile high-purity titanium dioxide with the purity of more than or equal to 98%,The total yield of the titanium dioxide is more than or equal to 85%. The method is mainly characterized in that efficient conversion and comprehensive impurity removal of the low-grade titanium-containing blast furnace slag are realized by utilizing an enhanced acidolysis and selective hydrothermal precipitation method, the method has the outstanding characteristics of short process flow, high product purity, high titanium yield, low acid consumption and the like, and a new way is provided for industrial application of the titanium-containing blast furnace slag.

Description

technical field [0001] The invention belongs to the technical field of chemical material preparation, and in particular relates to a method for preparing high-purity titanium dioxide by using titanium-containing blast furnace slag as a raw material. Background technique [0002] Titanium-containing blast furnace slag is a by-product produced in the blast furnace smelting process of vanadium-titanium magnetite, and the mass fraction of each component in the slag is TiO 2 : 21~25%; SiO 2 : 22~26%; CaO: 22~29%; Al 2 o 3 Fe: 16-19%; MgO: 7-9%; total Fe: 0.2-0.4%. At present, the comprehensive utilization rate of titanium-containing blast furnace slag resources is low, and it is mainly used to prepare low-end building materials such as slag cement, sanitary porcelain plates and alkali-resistant mineral wool (Liu Shuai, research status and development prospects of titanium extraction technology from high-titanium blast furnace slag, China Metallurgy, 2020, 30(3), 1~7), but the...

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): C01G23/053
CPCC01G23/0532C01P2006/80
Inventor 向兰王明亮杨卓颖杨帆
Owner TSINGHUA 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