CN104878413A - Method for utilizing titaniferous electric furnace slag for direct electrolysis to produce low-titanium-aluminum alloy - Google Patents
Method for utilizing titaniferous electric furnace slag for direct electrolysis to produce low-titanium-aluminum alloy Download PDFInfo
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- CN104878413A CN104878413A CN201510354895.3A CN201510354895A CN104878413A CN 104878413 A CN104878413 A CN 104878413A CN 201510354895 A CN201510354895 A CN 201510354895A CN 104878413 A CN104878413 A CN 104878413A
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Abstract
The invention discloses a method for utilizing titaniferous electric furance slag for direct electrolysis to produce low-titanium-aluminum alloy. The titaniferous electric furance slag serves as a raw material to be directly added in a small test electrolytic bath, the adding amount of the titaniferous electric furance slag is smaller than the weight of the electrolyte by 2 percent, the current aluminum electrolysis electrolyte is adopted as the electrolyte, the electrolyte molecular ratio is 2.3-2.45, the electrolysis temperature ranges from 950 DEG C to 960 DEG C, the polar distance is 38-42 cm, the molten aluminum level is 18-22 cm, the electrolytic current density is 0.78-0.8 A/cm<2>, and the electrolysis time is 17-19 hours. Compared with the prior art, the root position electrolysis of the titanium element is achieved, the utilization process of the titanium slag is shortened, the sufficient utilization of the titanium resource and the aluminum resource is achieved, the method is not limited by a groove type, the improvement on an existing technology is small, the process is simple, cost is low, and energy consumption is small.
Description
Technical field
The invention belongs to metallurgical slag comprehensive utilization and technical field of aluminum electrolysis, be specifically related to a kind of method that titaniferous electric furnace slag Direct Electrolysis produces low-titanium aluminum alloy.
Background technology
Titanium is a kind of strategic resource, and following realization comprises a series of " power's engineerings " such as " space flight strategy " and " "Oceanic" strategies " and all needs the strong support of China's titanium material industry.China contains very abundant v-ti magnetite ore resources, and wherein the titanium elements of about 90% is present in southwest China Flos Bombacis Malabarici-Xichang Region with the form of vanadium titano-magnetite.Because vanadium titano-magnetite is many metals mineral intergrowth, in the prior art, the utilization ratio of titanium resource only has an appointment 12%.At present, China is main uses two kinds of method process vanadium titano-magnetites: one is blast furnace process, and blast furnace process is mainly extracted iron in vanadium titano-magnetite and vanadium, and titanium elements then enters blast furnace slag and forms Chinese distinctive titanium-containing blast furnace slag; The method of another kind of process vanadium titano-magnetite is direct-reduction flow process, and primary product is direct-reduced iron and high titanium electric furnace slag.Due to the chemical composition all more complicated in these two kinds of Ti-containing slags, titanium elements be distributed widely in each titaniferous thing mutually in, result in that to utilize conventional beneficiation method from Ti-containing slag, extract titanium elements more difficult, at present, China has accumulated a large amount of Ti-containing slags, and still with the speed increase of annual more than 300 ten thousand tons.The huge Ti-containing slag of long-term stacking, storage not only brings serious environmental problem, and occupies a large amount of valuable land resources, the more important thing is the huge waste causing titanium resource.If can effectively utilize the titanium dioxide in Ti-containing slag to substitute the rutile titanium resource day by day reduced, new raw material sources are opened up in the development for China's titanium industry.
In prior art, the production of aluminum titanium alloy industrially generally adopts mix-melting method, by after the fusing of metallic aluminium and metal titanium in proportion to together with mixing, founding becomes aluminum titanium alloy, and the method energy consumption is large, and cost is high, and titanium casting yield is low, only has about 85%; Another kind titanium dioxide is added to Direct Electrolysis in electrolyzer to prepare low-titanium aluminum alloy, and the main component of titanium dioxide is titanium dioxide, and its production cost is higher, causes the production cost of low-titanium aluminum alloy also higher.
Summary of the invention
the technical problem to be solved in the present invention is:
There is provided a kind of titaniferous electric furnace slag Direct Electrolysis to produce the method for low-titanium aluminum alloy, day by day to reduce and the industrial production energy consumption of aluminium alloy is large, high in cost of production technical problem to solve rutile titanium resource in prior art.
the technical solution adopted in the present invention is:
Ti-containing slag is directly added in small-scale test electrolyzer as raw material, its addition is less than 2% of electrolyte weight, ionogen adopts existing Aluminium Electrolysis ionogen, electrolyte molecule compares 2.3-2.45, electrolysis temperature 950 DEG C-960 DEG C, pole span 38-42cm, aluminum liquid horizontal 18-22cm, electrolytic current density 0.78-0.8A/cm
2, electrolysis time is 17 ~ 19 hours.In the titaniferous electric furnace slag composition adopted, Al
2o
3>=15%, TiO
2>=45%, MgO>=10%, CaO>=4%.
compared with prior art, tool has the following advantages in the present invention:
1, the present invention directly adds Ti-containing slag in aluminium cell, by the TiO in Ti-containing slag
2as titanium elements source, by the Al in Ti-containing slag
2o
3as aluminium element source, achieve the in-situ electrolysis of titanium elements, what shorten titanium slag utilizes flow process, achieves making full use of of titanium resource and bauxite resource.
2, adopt electrolysis production low-titanium aluminum alloy of the present invention, not by the restriction of grooved, change less to existing technique, better with existing processing compatibility, and operation is simple, cost is low, energy consumption is low.
3, MgO and CaO in Ti-containing slag is tasted as the benefit of electrolyte system, make full use of calcium and magnesium elements resource, aluminium alloy electrolysis production cost can be reduced.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Fig. 2 is electrolyzer simplified schematic diagram of the present invention.
Embodiment
Embodiment 1:
The present invention carries out in small-sized fused salt electrolysis Thoughs.This electrolytic trial groove forms cell body by corundum crucible (3), plumbago crucible (4), corundum crucible (3) has opening at trench bottom, plumbago crucible (4) can directly be contacted with negative electrode aluminium (5), on the top of groove, graphite guide rod (1) connects carbon anode (2) and forms anode part, in groove, add existing Aluminium Electrolysis ionogen (6), cathode collector bar (7) is connected on plumbago crucible (4).
Titaniferous electric furnace slag is directly added small-sized fused salt electrolysis Thoughs, and its composition is: TiO
2: 50.62%, Al
2o
3: 19.01%, MgO:12.35%, CaO:4.52%, SiO
2: 8.3%, V
2o
5: 0.21%, TFe:1.52%, other: 3.47%.Electrolysis process technical qualification are as follows: electrolysis temperature 950 DEG C-960 DEG C, pole span 38-42cm, aluminum liquid horizontal 18-22cm, electrolyte molecule than 2.3-2.45, electrolytic current density 0.78-0.8A/cm
2, electrolysis time is 18h, and ionogen quality is 720g.In small electrolytic Thoughs groove, add 3.6g height titanium electric furnace slag, under galvanic effect, negative electrode starts precipitating metal aluminium and metal titanium, and final formation titanium content is the aluminium alloy of the low titanium content of 0.42%.
Embodiment 2:
Titaniferous electric furnace slag is directly added small-sized fused salt electrolysis Thoughs, and its composition is: TiO
2: 50.62%, Al
2o
3: 19.01%, MgO:12.35%, CaO:4.52%, SiO
2: 8.3%, V
2o
5: 0.21%, TFe:1.52%, other: 3.47%.Electrolysis process technical qualification are as follows: electrolysis temperature 950 DEG C-960 DEG C, pole span 38-42cm, aluminum liquid horizontal 18-22cm, electrolyte molecule than 2.3-2.45, electrolytic current density 0.78-0.8A/cm
2, electrolysis time is 18h, and ionogen quality is 720g, and in small electrolytic Thoughs, add 7.2g height titanium electric furnace slag, under galvanic effect, negative electrode starts precipitating metal aluminium and metal titanium, and final formation titanium content is the aluminium alloy of the low titanium content of 0.93%.
Although above the present invention is described in detail with a general description of the specific embodiments, on basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, all belong to the scope of protection of present invention.
Claims (2)
1. produce the method for low-titanium aluminum alloy with titaniferous electric furnace slag Direct Electrolysis for one kind, it is characterized in that: titaniferous electric furnace slag is directly added in aluminium cell as raw material, its addition is less than 2% of electrolyte weight, ionogen adopts existing Aluminium Electrolysis ionogen, molecular ratio 2.3-2.45, electrolysis temperature 950 DEG C-960 DEG C, pole span 38-42cm, aluminum liquid horizontal height 18-22cm, electrolytic current density 0.78-0.8A/cm
2, electrolysis time is 17 ~ 19 hours.
2. titaniferous electric furnace slag Direct Electrolysis according to claim 1 produces the method for low-titanium aluminum alloy, it is characterized in that: in the titaniferous electric furnace slag composition of employing, Al
2o
3>=15%, TiO
2>=45%, MgO>=10%, CaO>=4%.
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| CN104878413B CN104878413B (en) | 2017-04-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107805831A (en) * | 2017-11-04 | 2018-03-16 | 华北理工大学 | A kind of method that titanium prepares anticorrosive coat in blast furnace slag |
| CN109023432A (en) * | 2018-10-09 | 2018-12-18 | 龙蟒佰利联集团股份有限公司 | A kind of electrolyzing fused titanium dioxide prepares the method and electrolysis unit of titanium-aluminium alloy |
| CN109706482A (en) * | 2017-10-26 | 2019-05-03 | 遵义市吉祥富康门窗有限公司 | A kind of preparation method of titanium-aluminium alloy |
| CN111020194A (en) * | 2019-11-16 | 2020-04-17 | 银隆新能源股份有限公司 | Method for synthesizing titanium-aluminum alloy from waste lithium titanate anode and cathode powder |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706482A (en) * | 2017-10-26 | 2019-05-03 | 遵义市吉祥富康门窗有限公司 | A kind of preparation method of titanium-aluminium alloy |
| CN107805831A (en) * | 2017-11-04 | 2018-03-16 | 华北理工大学 | A kind of method that titanium prepares anticorrosive coat in blast furnace slag |
| CN109023432A (en) * | 2018-10-09 | 2018-12-18 | 龙蟒佰利联集团股份有限公司 | A kind of electrolyzing fused titanium dioxide prepares the method and electrolysis unit of titanium-aluminium alloy |
| CN111020194A (en) * | 2019-11-16 | 2020-04-17 | 银隆新能源股份有限公司 | Method for synthesizing titanium-aluminum alloy from waste lithium titanate anode and cathode powder |
| CN111020194B (en) * | 2019-11-16 | 2023-10-13 | 银隆新能源股份有限公司 | Method for synthesizing titanium-aluminum alloy from waste lithium titanate anode and cathode powder |
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| CN104878413B (en) | 2017-04-26 |
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