CN105132936B - One kind prepares CaTiO with fused salt electrolysis process from ilmenite3The method of powder - Google Patents

One kind prepares CaTiO with fused salt electrolysis process from ilmenite3The method of powder Download PDF

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Publication number
CN105132936B
CN105132936B CN201510391422.0A CN201510391422A CN105132936B CN 105132936 B CN105132936 B CN 105132936B CN 201510391422 A CN201510391422 A CN 201510391422A CN 105132936 B CN105132936 B CN 105132936B
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fused salt
ilmenite
catio
powder
electrolysis
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CN105132936A (en
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华新
华一新
周忠仁
徐存英
李坚
张启波
李艳
龚凯
汝娟坚
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Kunming University of Science and Technology
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Kunming University of Science and Technology
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Abstract

CaTiO is prepared from ilmenite with fused salt electrolysis process the present invention relates to one kind3The method of powder, belong to non-ferrous metallurgy technology field.Under an inert atmosphere, by CaO, NaCl and CaCl2The fused salt for obtaining and melting completely is well mixed and heated up, the ilmenite for accounting for fused salt mass fraction 1%~15.2% is added into fused salt and well mixed obtain is electrolysed fused salt;Electrolysis fused salt is placed in electrolytic cell, negative electrode is used as using molybdenum bar, control molybdenum bar does not contact the ilmenite of bottom of electrolytic tank, graphite rod is as 6~8h of anode electrolysis, take out bottom of electrolytic tank product, after impurity in product, deionized water rinsing and drying and other steps are filtered away through 1wt.%HCl solution, CaTiO is obtained3Powder.This method is solve CaTiO3Prior art into the problems such as reaction temperature during production is high, technological process is long, high energy consumption.

Description

One kind prepares CaTiO with fused salt electrolysis process from ilmenite3The method of powder
Technical field
CaTiO is prepared from ilmenite with fused salt electrolysis process the present invention relates to one kind3The method of powder, belongs to non-ferrous metal Metallurgical technology field.
Background technology
Calcium titanate(CaTiO3)As perovskite composite oxide ABO3One kind of novel inorganic nonmetallic materials, has The crystal structure of stabilization, unique electromagnetic performance and very high redox, photocatalysis and electro-catalysis isoreactivity, are situated between in microwave The fields such as matter ceramics, photo catalytic reduction are widely used.
CaTiO at present3Production method mainly have solid sintering technology, mechanochemistry synthesis method, soft chemical method etc..Its In, solid sintering technology uses TiO2Be raw material with corresponding metal carbonate or oxide, by it is pre-sintered, re-sinter, cool down Make its crystallization etc. step, obtain titanate micro mist, but the crystallite dimension of this method synthesis influenceed by sintering temperature it is big, to raw material Requirement it is high, energy consumption is big, therefore is not suitable for extensive use.Mechanochemistry synthesis method is that raw material is passed through into the timing of high-energy ball milling one Between after obtain presoma, then obtained after high temperature sintering.But this method influenceed by Ball-milling Time it is notable, using still not extensive. Soft chemical method mainly has sol-gel(sol-gel)Method, fused salt(Cosolvent)Method etc., such method can prepare that ultra-fine, composition is equal Even composite oxides powder, but grow reaction time, process conditions are difficult to control, and yield is less.
Fused salt electrolysis process prepares metal and the existing long history of alloy, wherein most typical represent is with ice crystal-oxygen Change the Bayer method electrolytic production of aluminum that aluminium is raw material.Since 20th century, using FFC methods as the fused salt electrolysis process of new generation of representative and with SOM methods are the appearance of the novel molten salt method of representative, new vitality are filled with for the research of molten-salt electrolysis, especially in refractory metal Preparation process in substantially reduce production procedure, degraded cost, to reducing requirement in the preparation of raw material.
The A of China Patent Publication No. CN 102874866 report prepares flake micron with molten-salt growth method combination topochemistry method Level calcium titanate crystal.This method adds reaction speed, contracted by two steps of chemical synthesis in the preparation and fused salt of presoma Short manufacturing cycle, but reaction temperature is high, easily there is impurity generation.
The B of China Patent Publication No. CN 101792304 report to be prepared with satisfactory electrical conductivity and excellent with solid sintering technology The complex perovskite structure ceramic material of different decay resistance, but this method length reaction time, composition are uncontrollable.
The A of China Patent Publication No. CN 103159473, which provide one kind, can prepare dielectric constant, high Q, frequency temperature system The preparation method of the adjustable microwave dielectric ceramic materials of number.Mainly have that technological process is long, crystallite dimension is uneven the shortcomings that this method.
The content of the invention
For the above-mentioned problems of the prior art and deficiency, the present invention provides one kind fused salt electrolysis process from ilmenite Prepare CaTiO3The method of powder.The purpose of this method is solve CaTiO3Prior art into reaction temperature during production it is high, The problems such as technological process is long, high energy consumption, the present invention is achieved through the following technical solutions.
One kind prepares CaTiO with fused salt electrolysis process from ilmenite3The method of powder, it is comprised the following steps that:
Step 1, under an inert atmosphere, by CaO, NaCl and CaCl2According to mol ratio(0.8~1):(8~12):(10~ 20)It is well mixed and is warming up to 650~850 DEG C and obtain the fused salt melted completely, is added into fused salt and account for fused salt mass fraction 1% ~15.2% ilmenite and well mixed acquisition electrolysis fused salt;
Step 2, the electrolysis fused salt of step 1 is placed in electrolytic cell, using molybdenum bar as negative electrode, control molybdenum bar does not contact electrolysis The ilmenite of trench bottom, graphite rod is as anode, then it in 2.8~3.2V, electrolysis temperature is 650~850 DEG C of bars to control tank voltage 6~8h is electrolysed under part, takes out bottom of electrolytic tank product, impurity in product, deionized water are filtered away through 1wt.%HCl solution Rinse with after drying and other steps, obtain CaTiO3Powder.
The inert atmosphere is argon inert gas, wherein purity of argon>99.9%.
The ilmenite includes following mass percent component:Titanium 31.6%, iron 36.8%.
The beneficial effects of the invention are as follows:CaTiO is prepared from ilmenite with fused salt electrolysis process process provides one kind3Powder The effective way at end, obtained CaTiO3Powder purity is high, compared with existing solid phase method, significantly reduces the temperature of reaction, Shorten production cycle and technological process, and it is ilmenite abundance, cheap, prepare CaTiO in electrolysis ilmenite3Powder Energy consumption is smaller during end, economic and environment-friendly.
Embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1
This prepares CaTiO with fused salt electrolysis process from ilmenite3The method of powder, it is comprised the following steps that:
Step 1, under an inert atmosphere, by CaO, NaCl and CaCl2According to mol ratio 0.8:8:20 are well mixed and heat up The fused salt melted completely is obtained to 650 DEG C, the ilmenite of fused salt mass fraction 1% and well mixed acquisition electricity are added into fused salt Solve fused salt;Inert atmosphere is argon gas, purity>99.9%;Ilmenite includes following mass percent component:Titanium 31.6%, iron 36.8%;
Step 2, the electrolysis fused salt of step 1 is placed in electrolytic cell, with molybdenum bar(Purity >=99.95%)As negative electrode, control Molybdenum bar does not contact the ilmenite of bottom of electrolytic tank, and graphite rod is as anode, then controls tank voltage in 2.8V, electrolysis temperature 650 It is electrolysed 8h under the conditions of DEG C, takes out bottom of electrolytic tank product, impurity in product, deionized water is filtered away through 1wt.%HCl solution Rinse with after drying and other steps, obtain CaTiO3Powder.
Embodiment 2
This prepares CaTiO with fused salt electrolysis process from ilmenite3The method of powder, it is comprised the following steps that:
Step 1, under an inert atmosphere, by CaO, NaCl and CaCl2According to mol ratio 1:12:10 are well mixed and are warming up to 850 DEG C obtain the fused salt melted completely, and the ilmenite of fused salt mass fraction 15.2% and well mixed acquisition electricity are added into fused salt Solve fused salt;Inert atmosphere is argon gas, purity>99.9%;Ilmenite includes following mass percent component:Titanium 31.6%, iron 36.8%
Step 2, the electrolysis fused salt of step 1 is placed in electrolytic cell, with molybdenum bar(Purity >=99.95%)As negative electrode, control Molybdenum bar does not contact the ilmenite of bottom of electrolytic tank, and graphite rod is as anode, then controls tank voltage in 3.2V, electrolysis temperature 850 It is electrolysed 6h under the conditions of DEG C, takes out bottom of electrolytic tank product, impurity in product, deionized water is filtered away through 1wt.%HCl solution Rinse with after drying and other steps, obtain CaTiO3Powder.
Embodiment 3
This prepares CaTiO with fused salt electrolysis process from ilmenite3The method of powder, it is comprised the following steps that:
Step 1, under an inert atmosphere, by CaO, NaCl and CaCl2According to mol ratio 1:10:15 are well mixed and are warming up to 700 DEG C obtain the fused salt that melts completely, and the ilmenite of fused salt mass fraction 10% is added into fused salt and well mixed is electrolysed Fused salt;Inert atmosphere is argon gas, purity>99.9%;Ilmenite includes following mass percent component:Titanium 31.6%, iron 36.8%
Step 2, the electrolysis fused salt of step 1 is placed in electrolytic cell, with molybdenum bar(Purity >=99.95%)As negative electrode, control Molybdenum bar does not contact the ilmenite of bottom of electrolytic tank, and graphite rod is as anode, then controls tank voltage in 3.2V, electrolysis temperature 700 It is electrolysed 7h under the conditions of DEG C, takes out bottom of electrolytic tank product, impurity in product, deionized water is filtered away through 1wt.%HCl solution Rinse with after drying and other steps, obtain CaTiO3Powder.
Embodiment 4
This prepares CaTiO with fused salt electrolysis process from ilmenite3The method of powder, it is comprised the following steps that:
Step 1, under an inert atmosphere, by CaO, NaCl and CaCl2According to mol ratio 1:8:20 are well mixed and are warming up to 700 DEG C obtain the fused salt melted completely, and the ilmenite of fused salt mass fraction 15.2% and well mixed acquisition electricity are added into fused salt Solve fused salt;Inert atmosphere is argon gas, purity>99.9%;Ilmenite includes following mass percent component:Titanium 31.6%, iron 36.8%;
Step 2, the electrolysis fused salt of step 1 is placed in electrolytic cell, with molybdenum bar(Purity >=99.95%)As negative electrode, control Molybdenum bar does not contact the ilmenite of bottom of electrolytic tank, and graphite rod is as anode, then controls tank voltage in 3.2V, electrolysis temperature 700 It is electrolysed 8h under the conditions of DEG C, takes out bottom of electrolytic tank product, impurity in product, deionized water is filtered away through 1wt.%HCl solution Rinse with after drying and other steps, obtain CaTiO3Powder.
Embodiment 5
This prepares CaTiO with fused salt electrolysis process from ilmenite3The method of powder, it is comprised the following steps that:
Step 1, under an inert atmosphere, by CaO, NaCl and CaCl2According to mol ratio 0.8:12:20 are well mixed and heat up The fused salt melted completely is obtained to 750 DEG C, the ilmenite of fused salt mass fraction 10% and well mixed acquisition electricity are added into fused salt Solve fused salt;Inert atmosphere is argon gas, purity>99.9%;Ilmenite includes following mass percent component:Titanium 31.6%, iron 36.8%;
Step 2, the electrolysis fused salt of step 1 is placed in electrolytic cell, with molybdenum bar(Purity >=99.95%)As negative electrode, control Molybdenum bar does not contact the ilmenite of bottom of electrolytic tank, and graphite rod is as anode, then controls tank voltage in 3.0V, electrolysis temperature 750 It is electrolysed 6h under the conditions of DEG C, takes out bottom of electrolytic tank product, impurity in product, deionized water is filtered away through 1wt.%HCl solution Rinse with after drying and other steps, obtain CaTiO3Powder.
The embodiment of the present invention is explained in detail above, but the present invention is not limited to above-mentioned embodiment party Formula, in those of ordinary skill in the art's possessed knowledge, it can also make on the premise of present inventive concept is not departed from Go out various change.

Claims (3)

1. one kind prepares CaTiO with fused salt electrolysis process from ilmenite3The method of powder, it is characterised in that comprise the following steps that:
Step 1, under an inert atmosphere, by CaO, NaCl and CaCl2According to mol ratio(0.8~1):(8~12):(10~20)It is mixed Close uniformly and be warming up to 650~850 DEG C and obtain the fused salt that melts completely, added into fused salt account for fused salt mass fraction 1%~ 15.2% ilmenite and well mixed acquisition electrolysis fused salt;
Step 2, the electrolysis fused salt of step 1 is placed in electrolytic cell, using molybdenum bar as negative electrode, control molybdenum bar does not contact cell bottom The ilmenite in portion, graphite rod is as anode, then controls tank voltage under the conditions of 2.8~3.2V, electrolysis temperature are 650~850 DEG C 6~8h is electrolysed, bottom of electrolytic tank product is taken out, impurity, the deionized water rinsing in product is filtered away through 1wt.%HCl solution After drying steps, CaTiO is obtained3Powder.
2. according to claim 1 prepare CaTiO with fused salt electrolysis process from ilmenite3The method of powder, its feature exist In:The inert atmosphere is argon inert gas, wherein purity of argon>99.9%.
3. according to claim 1 prepare CaTiO with fused salt electrolysis process from ilmenite3The method of powder, its feature exist In:The ilmenite includes following mass percent component:Titanium 31.6%, iron 36.8%.
CN201510391422.0A 2015-07-07 2015-07-07 One kind prepares CaTiO with fused salt electrolysis process from ilmenite3The method of powder Expired - Fee Related CN105132936B (en)

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Citations (4)

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Publication number Priority date Publication date Assignee Title
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EP2064369B1 (en) * 2006-09-21 2011-03-30 Qit-Fer Et Titane Inc. Electrochemical process for the recovery of metallic iron and chlorine values from iron-rich metal chloride wastes
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CN104451758A (en) * 2014-11-13 2015-03-25 昆明理工大学 Method for preparing titanium carbide by performing molten salt electrolysis on high titanium slags

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Publication number Priority date Publication date Assignee Title
GB0913736D0 (en) * 2009-08-06 2009-09-16 Chinuka Ltd Treatment of titanium ores

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
EP2064369B1 (en) * 2006-09-21 2011-03-30 Qit-Fer Et Titane Inc. Electrochemical process for the recovery of metallic iron and chlorine values from iron-rich metal chloride wastes
CN101445942A (en) * 2008-11-28 2009-06-03 清华大学 Method for preparing solid oxide electrolytic cell anode material perovskite structure nano-powder
CN103556167A (en) * 2013-10-23 2014-02-05 攀钢集团攀枝花钢铁研究院有限公司 Method for preparing titanium carbide through molten salt electrolysis
CN104451758A (en) * 2014-11-13 2015-03-25 昆明理工大学 Method for preparing titanium carbide by performing molten salt electrolysis on high titanium slags

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