CN104878413B - 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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- CN104878413B CN104878413B CN201510354895.3A CN201510354895A CN104878413B CN 104878413 B CN104878413 B CN 104878413B CN 201510354895 A CN201510354895 A CN 201510354895A CN 104878413 B CN104878413 B CN 104878413B
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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, and in particular to one kind is straight with titaniferous electroslag
The method for connecing electrolysis production low-titanium aluminum alloy.
Background technology
Titanium is a kind of strategic resource, and future is realized comprising " space flight strategy " and " "Oceanic" strategy " etc. a series of " power's engineerings "
It is required for the strong support of China's titanium material industry.China contains extremely abundant v-ti magnetite ore resources, wherein 90%
The titanium elements of left and right are in the form of vanadium titano-magnetite in southwest China Flos Bombacis Malabarici-Xichang Region.Due to vanadium titano-magnetite
For many metal mineral intergrowths, in the prior art, the utilization rate only about 12% of titanium resource.At present, China mainly uses two kinds of sides
Method processes vanadium titano-magnetite：One kind is blast furnace process, and blast furnace process is mainly extracted ferrum and vanadium in vanadium titano-magnetite, and titanium is first
It is plain then form Chinese distinctive titanium-containing blast furnace slag into blast furnace slag；It is direct-reduction stream that another kind processes the method for vanadium titano-magnetite
Journey, primary product is DRI and high titanium electroslag.Due to the chemical composition in both Ti-containing slags it is all more complicated,
Titanium elements are distributed widely in each titaniferous thing phase, be result in and titanium elements are extracted from Ti-containing slag using conventional beneficiation method are compared
Difficulty, at present, substantial amounts of Ti-containing slag has been accumulated by China, and still with more than annual 300 ten thousand tons of speed increase.Stack for a long time, deposit
The huge Ti-containing slag of amount not only brings serious environmental problem, and occupies a large amount of valuable land resources, more important
Be the huge waste for causing titanium resource.If the titanium dioxide in energy effectively utilizes Ti-containing slag substitutes the gold for increasingly reducing
Red stone titanium resource, will open up new raw material sources for the development of China's titanium industry.
The production of aluminum titanium alloy in prior art industrially typically adopts mix-melting method, will metallic aluminium and Titanium fusing
Afterwards in proportion to mixing together, into aluminum titanium alloy, the method energy consumption is big, and high cost, titanium casting yield is low for founding, and only 85% or so；
Another kind is that titanium dioxide is added to into Direct Electrolysis in electrolysis bath to prepare low-titanium aluminum alloy, and the main component of titanium dioxide is titanium dioxide
Titanium, its production cost is higher, causes the production cost of low-titanium aluminum alloy also higher.
The content of the invention
The technical problem to be solved in the present invention is：
A kind of method that use titaniferous electric furnace slag with direct electrolysis produces low-titanium aluminum alloy is provided, to solve prior art in golden red
The technical problem such as stone titanium resource is increasingly reduced and the commercial production energy consumption of aluminium alloy is big, cost is high.
The technical solution adopted in the present invention is：
It is directly added into Ti-containing slag as raw material in small-scale test electrolysis bath, its addition is less than electrolyte weight
2%, electrolyte adopts existing aluminum electrolysis electrolyte, electrolyte molecule than 2.3-2.45,950 DEG C -960 DEG C of electrolysis temperature,
Pole span 38-42cm, aluminum liquid horizontal 18-22cm, electrolytic current density 0.78-0.8A/cm2, electrolysis time is 17 ~ 19 hours.Adopt
In titaniferous electric furnace slag ingredient, Al2O3>=15%, TiO2>=45%, MgO >=10%, CaO >=4%.
The present invention compared with prior art, has the advantage that：
1st, the present invention is directly added into Ti-containing slag in aluminium cell, by the TiO in Ti-containing slag2Come as titanium elements
Source, by the Al in Ti-containing slag2O3As aluminium element source, the in-situ electrolysis of titanium elements is realized, shorten titanium slag utilizes stream
Journey, realizes making full use of for titanium resource and bauxite resource.
2nd, adopt electrolysis production low-titanium aluminum alloy of the present invention, do not limited by grooved, to existing process change it is less, with show
There is processing compatibility preferably, and operation is simple, low cost, energy consumption are low.
3rd, the MgO and CaO in Ti-containing slag is made full use of into calcium and magnesium elements resource as the back-off of electrolyte system,
Aluminium alloy electrolysis production cost can be reduced.
Description of the drawings
Fig. 1 is the process flow diagram of the present invention.
Fig. 2 is the electrolysis bath simplified schematic diagram of the present invention.
Specific embodiment
Embodiment 1：
The present invention is carried out in small-sized molten-salt electrolysis test flume.The electrolytic trial groove is by corundum crucible（3）, graphite crucible
（4）Constitute cell body, corundum crucible（3）There is opening in trench bottom, make graphite crucible（4）With negative electrode aluminum（5）Can with directly contact,
The top of groove, graphite guide rod（1）Connection carbon anode（2）Anode part is constituted, adds existing aluminum electrolysis to be electrolysed in groove
Matter（6）, cathode collector bar（7）It is connected to graphite crucible（4）On.
Titaniferous electroslag is directly added into into small-sized molten-salt electrolysis test flume, its composition is：TiO2：50.62%, Al2O3：
19.01%, MgO：12.35%, CaO：4.52%, SiO2：8.3%, V2O5：0.21%, TFe：1.52%, other：3.47%.Electricity
Solution technology condition is as follows：950 DEG C -960 DEG C of electrolysis temperature, pole span 38-42cm, aluminum liquid horizontal 18-22cm, electrolyte molecule
Than 2.3-2.45, electrolytic current density 0.78-0.8A/cm2, electrolysis time is 18h, and electrolyte quality is 720g.To small electrical
Add the high titanium electroslags of 3.6g in solution test flume groove, in the presence of unidirectional current, negative electrode starts precipitating metal aluminum and Titanium, most
Aluminium alloy of the end form into the low titanium content that Ti content is 0.42%.
Embodiment 2：
Titaniferous electroslag is directly added into into small-sized molten-salt electrolysis test flume, its composition is：TiO2：50.62%, Al2O3：
19.01%, MgO：12.35%, CaO：4.52%, SiO2：8.3%, V2O5：0.21%, TFe：1.52%, other：3.47%.Electricity
Solution technology condition is as follows：950 DEG C -960 DEG C of electrolysis temperature, pole span 38-42cm, aluminum liquid horizontal 18-22cm, electrolyte molecule
Than 2.3-2.45, electrolytic current density 0.78-0.8A/cm2, electrolysis time is 18h, and electrolyte quality is 720g, to small electrical
Add the high titanium electroslags of 7.2g in solution test flume, in the presence of unidirectional current, negative electrode starts precipitating metal aluminum and Titanium, finally
Form the aluminium alloy of the low titanium content that Ti content is 0.93%.
Although above with a general description of the specific embodiments the present invention is described in detail,
On the basis of the present invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Cause
This, without departing from theon the basis of the spirit of the present invention these modifications or improvements, belong to the scope of protection of present invention.
Claims (1)
1. a kind of method that use titaniferous electric furnace slag with direct electrolysis produces low-titanium aluminum alloy, it is characterised in that：Titaniferous electroslag is made
It is directly added in aluminium cell for raw material, less than the 2% of electrolyte weight, electrolyte adopts existing aluminum electrolysis to its addition
With electrolyte, molecular proportion 2.3-2.45,950 DEG C -960 DEG C of electrolysis temperature, pole span 38-42cm, aluminum liquid horizontal height 18-22cm,
Electrolytic current density 0.78-0.8A/cm2, electrolysis time is 17 ~ 19 hours;Using titaniferous electric furnace slag ingredient in, Al2O3≥
15%, TiO2>=45%, MgO >=10%, CaO >=4%.
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| 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 |
| 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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