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Method for extracting Ti-rich compounds from Ti- containing slag

A compound and titanium slag technology, which is applied in the field of separation and extraction of titanium-rich compounds, can solve the problems of short process flow, complex process, secondary pollution, etc., and achieve the effect of short process flow, simple equipment and easy operation

Active Publication Date: 2010-07-21
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The purpose of the present invention is to solve the disadvantages that the titanium resources in the titanium-containing blast furnace slag and high-titanium electric furnace slag are difficult to be extracted by conventional mineral processing and metallurgical methods. , to provide a method for separating and extracting titanium-rich compounds from titanium-containing slag, enriching the titanium element in titanium-containing slag into black titanite, the obtained titanium-rich compound product has less impurities, short process flow, and no environmental pollution

Method used

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  • Method for extracting Ti-rich compounds from Ti- containing slag
  • Method for extracting Ti-rich compounds from Ti- containing slag
  • Method for extracting Ti-rich compounds from Ti- containing slag

Examples

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Embodiment 1

[0038] Titanium-containing blast furnace slag (main components are: MgO content is 6.93wt%, Al 2 o 3 content of 13.04wt%, CaO content of 26.86wt%, SiO 2 Content is 24.26wt%, TiO 2 The content is 22.58wt%) and the acidic oxide SiO 2 (addition is 28wt% of slag amount) and P 2 o 5 (Addition amount is 4wt% of slag amount) put into graphite crucible (reductive agent), be heated up to 1500 ℃ of melting in silicon-molybdenum furnace after heat preservation 2 hours, drop rapidly to 1220 ℃ of heat preservation 3 hours, rapidly cool to room temperature, 77% Titanium dioxide can be enriched in black titanite without other crystals, which is beneficial for subsequent separation. However, in the comparative example, titanium is dispersed in various titanium-containing crystals, which makes it difficult to enrich titanium and is not conducive to the subsequent separation of titanium.

[0039] image 3 , Pic 4-1 , 4-2 It is a scanning electron microscope photo and an energy spectru...

Embodiment 2

[0044] Titanium-containing blast furnace slag (main components are: MgO content is 6.93wt%, Al 2 o 3 content of 13.04wt%, CaO content of 26.86wt%, SiO 2 Content is 24.26wt%, TiO 2 The content is 22.58wt%) and the acidic oxide SiO 2 (Addition amount is 52wt% of slag) into graphite crucible (reductive agent), be heated up to 1430 ℃ of melting in silicon-molybdenum furnace after heat preservation 1 hour, drop rapidly to 1260 ℃ of heat preservation 5 hours, quench and cool to room temperature then. Through XRD analysis and metallographic microscope observation, the chemical formula of black titanite is Mg 0.3 Ti 2.7 o 5 , the diameter of black titanium stone is 20-30um, no other crystals are formed, which is beneficial to the subsequent separation of black titanium stone.

[0045] Figure 5 , Figure 6 The XRD spectrum and metallographic micrographs of the black titanite crystal obtained in this embodiment.

Embodiment 3

[0047] Titanium-containing blast furnace slag (main components are: MgO content is 6.93wt%, Al 2 o 3 content of 13.04wt%, CaO content of 26.86wt%, SiO 2 Content is 24.26wt%, TiO 2 The content is 22.58wt%) and the acidic oxide SiO 2 (addition amount is 26wt% of slag) puts into molybdenum crucible, outer jacket graphite crucible, heats up to 1465 ℃ of melting insulations in silicon-molybdenum furnace after 4 hours, drops rapidly to 1200 ℃ of insulations for 12 hours, then quenches and cools to room temperature, the whole experiment CO gas (reducing agent) is passed through the process, and the flow rate is 80ml / min. Through XRD analysis and metallographic microscope observation, the chemical formula of black titanite is Ti 3 o 5 , no other crystals are formed, which is beneficial to the subsequent separation of black titanite.

[0048] Figure 7 , Figure 8 The XRD spectrum and energy spectrum analysis line scan photos of the black titanite crystal obtained in this examp...

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Abstract

The invention provides a method for extracting Ti-rich compounds from Ti-containing slag. The method comprises the following steps: first adding some acidic oxide to the Ti-containing slag with the existence of reducing agent, conducting the mixing process in the molten state, and then cooling off the mixture to crystallize to get the Ti-rich compound. The invention takes full advantage of the high-temperature and low-reducibility features of the Ti-containing slag, and can obtain a high-quality Ti-rich compound with fewer impurities. The titanium dioxide content of the Ti compound is over 70 percent, and thus facilitating the separation and extraction of titanium dioxide. The residue after the separation of titanium dioxide can be used to produce slag cement. The invention has the advantages of simple process, easy device, convenient operation and environmental protection. The invention enables the slag's own heat energy to be fully used. And the obtained production contains less impurities.

Description

technical field [0001] The invention relates to a method for comprehensively utilizing titanium-containing slag, in particular to a method for separating and extracting titanium-rich compounds from titanium-containing slag. Background technique [0002] As we all know, the Panzhihua-Xichang area is extremely rich in vanadium-titanium magnetite. Since vanadium-titanium magnetite is a polymetallic symbiotic ore, the utilization rate of titanium resources is only about 12% under the current main technology and production process. More than 50% of the titanium in the raw ore enters the iron concentrate, and enters the blast furnace slag during the subsequent blast furnace smelting process, forming Panzhihua's unique titanium-containing blast furnace slag. Due to the complex chemical composition of titanium-containing blast furnace slag (TiO 2 : 22~25%, SiO 2 : 22~26%, Al 2 o 3 : 16~19%, Fe 2 o 3 : 0.22~0.44%, CaO: 22~29% and MgO: 7~9% and other trace elements, such as S, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/12C22B3/00
Inventor 王习东郭敏张作泰张梅李静刘丽丽
Owner PEKING UNIV
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