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Method for extracting scandium oxide from titanium slag chloride waste

A waste, scandium oxide technology, applied in the direction of improving process efficiency, can solve the problems of low scandium concentration, loss of chemical properties, low extraction rate and impurity separation rate, etc., and achieve high product quality, good economic and social benefits. , the effect of simple process

Inactive Publication Date: 2012-11-28
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still two disadvantages in the scandium-containing solution in the extraction process: one is that the concentration of scandium is very low; the other is that compared with the content of scandium, the content of impurities is very high, and many impurities will form mixed complexes with scandium. The behavior of scandium in aqueous solution has a great influence, so that scandium often loses its chemical characteristics
Therefore, in the actual process, the extraction rate of scandium and the separation rate of impurities are low, and the product quality is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1 Extraction of Scandium Oxide from Titanium Slag Chlorination Fumes

[0043] Chlorinated soot with 5000g titanium slag (of which Sc 2 o 3 content of 0.315kg / t smoke) as raw material, water as leaching agent, adding water with a liquid-solid mass ratio of 5:1 and stirring for leaching for 2 hours, after clarification, extract the supernatant liquid and conduct a full analysis of chemical elements; Add a certain amount of iron powder to the clear liquid to react for 20 minutes, then add a certain amount of humic acid, adjust the pH of the solution to about 5 and stir evenly to obtain a certain amount of precipitation (the amount of added iron powder and humic acid is the amount of Fe in the clear liquid. 3+ and Sc 3+ 1.3 times the number of moles), followed by filtration and washing, and the filtrate and washing liquid are returned as leaching agents for chlorinated waste of titanium slag, and the precipitation is added with hydrochloric acid with a liquid-soli...

Embodiment 2

[0044] Example dititanium slag chlorination waste molten salt to extract scandium oxide

[0045] Chlorinated waste molten salt with 5000g titanium slag (wherein Sc 2 o 3 The content is 0.203kg molten salt) as raw material, water as leaching agent, adding water with a liquid-solid mass ratio of 3:1, stirring and leaching for 1 hour, after clarification, extract the supernatant liquid and conduct a full analysis of chemical elements; Add a certain amount of iron powder in the solution to react for 20 minutes, then add a certain amount of humic acid, adjust the pH of the solution to about 5 and stir evenly to obtain a certain amount of precipitation (the amount of added iron powder and humic acid is the amount of Fe in the clear liquid. 3+ and Sc 3+ 1.1 times the number of moles), followed by filtration and washing, and the filtrate and washing liquid are returned as leaching agents for chlorinated waste of titanium slag, and the precipitation is added with hydrochloric acid wi...

Embodiment 3

[0046] EXAMPLE 3 Extraction of Scandium Oxide from Titanium Slag Chlorination Soot and Chlorination Waste Molten Salt Mixture

[0047] Put 2500g titanium slag chlorination fumes (wherein Sc 2 o 3 content of 0.315kg / t soot) and 2500g chlorinated waste molten salt (of which Sc 2 o 3 The content is 0.203kg molten salt) After mixing, take a certain amount as the raw material, water as the leaching agent, add water with a liquid-solid mass ratio of 5:1 and stir for leaching for 2 hours. After clarification, take the supernatant liquid and conduct chemical element analysis Full analysis; add a certain amount of iron powder to the above clear liquid to react for 20 minutes, then add a certain amount of humic acid, adjust the pH of the solution to about 5 and stir evenly to obtain a certain amount of precipitation (the amount of added iron powder and humic acid is the amount of Fe in the clear liquid 3+ and Sc 3+ 1.3 times the number of moles), followed by filtration and washing, ...

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Abstract

The invention discloses a method for extracting scandium oxide from titanium slag chloride waste, belonging to the field of comprehensive utilization of vanadium titano-magnetite resources. The method comprises the following steps: a, adding water to titanium slag chloride waste, and leaching; b, adding a reducer to the supernate obtained in the step a, then adding humic acid, regulating the pH value, and filtering to obtain precipitate; c, adding a hydrochloric acid solution to perform acidolysis reaction, and then filtering to obtain a coarse scandium solution; d, respectively performing extraction, washing and back extraction on the coarse scandium solution by taking (2-ethylhexyl)-2-ethylhexyl phosphonate as an extractant, the hydrochloric acid solution as a washing agent and a sodium hydroxide solution as a back extractant, thus obtaining a pure scandium solution; and e, adding oxalic acid to perform scandium precipitation, and calcining to obtain scandium oxide, wherein the grade of the obtained scandium oxide is about 95%. The method disclosed by the invention is high in product quality and simple in process, reasonably utilizes scandium resources in the titanium slag chloride waste, and has favorable economic benefits and social benefits.

Description

technical field [0001] The invention relates to a comprehensive utilization and treatment method for rare metals in vanadium-titanium-magnetite resources, in particular to a method for extracting scandium oxide from titanium slag chlorination waste. Background technique [0002] Panzhihua vanadium-titanium magnetite is a polymetallic symbiotic deposit. In addition to iron, titanium, vanadium, chromium and other metals, the ore also contains 250,000 tons of scandium. The development and utilization of vanadium-titanium magnetite in Panzhihua has experienced three important turning points represented by blast furnace smelting vanadium-titanium magnetite, atomization vanadium extraction and titanium concentrate beneficiation, and gradually realized the large-scale utilization of iron, vanadium and titanium elements. Form the production capacity of a series of iron, vanadium and titanium products. However, the comprehensive utilization rate of resources is still at a low level....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/04C22B3/44C22B59/00
CPCY02P10/20
Inventor 刘松利张雪峰方民宪李刚付超陈文明
Owner PANZHIHUA UNIV
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