CN107557600A - A kind of high ferrotitanium alloy and preparation method thereof - Google Patents
A kind of high ferrotitanium alloy and preparation method thereof Download PDFInfo
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- CN107557600A CN107557600A CN201710837991.2A CN201710837991A CN107557600A CN 107557600 A CN107557600 A CN 107557600A CN 201710837991 A CN201710837991 A CN 201710837991A CN 107557600 A CN107557600 A CN 107557600A
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Abstract
The invention discloses a kind of high ferrotitanium alloy and preparation method thereof, belongs to alloy smelting technology field.Preparation method, including：The raw material ilmenite concentrate, titanium dioxide, high titanium slag, ferrosilicon, lime, aluminium powder, calcirm-fluoride, potassium chlorate and the magnesium powder that prepare high ferrotitanium alloy are placed in reacting furnace, reacting furnace is warming up to 1,145 1160 DEG C under vacuum, natural cooling cools after being incubated 1 5min, after question response furnace temperature is down to room temperature, obtained reaction product is subjected to de- Slag treatment, high ferrotitanium alloy is made.Production method of the present invention is simple to operation, the impurity contents such as obtained ferrotianium product oxygen are low, can effectively solve problem, the high ferrotianium produced such as high-quality titanium resource dependence, product impurity content height in the high ferrotianium production of tradition can produce for high-end Ti-containing steel and provide high-quality ferro-titanium.
Description
Technical field
The present invention relates to ferroalloy smelting technical field, and in particular to a kind of high ferrotitanium alloy and preparation method thereof.
Background technology
High ferrotianium refers to that Ti content is 65%~75% ferro-titanium, and it is manufacturing high-grade steel, special alloy, hydrogen bearing alloy
It is widely used in material and coating of welding electrode.According to the situation in international high ferrotianium market, the ferrotianium demand of high content titanium
Measure increasing.
At present, the main three kinds of methods of the preparation method of high ferrotianium.
The first is remelting process, is the main method for preparing high-quality high ferrotianium at present, it be using useless titanium or titanium sponge as
Raw material adds iron remelting, and the method typically uses induction furnace remelting, and also useful consumable electrode arc furnace is smelted or converts titanium sponge with molten steel
Produce high ferrotianium.In China because raw material sources limit, and production cost is high, seriously constrains the application of high ferrotianium, this method
It is difficult to be widely applied.
Second method is metallothermic processes, and main at present to make reducing agent using aluminium, rutile is main titanium material,
Reduced to obtain high ferrotianium under normal pressure or vacuum, the method has the advantages such as raw material sources are wide, production cost is low.It is but domestic
The high ferrotianium amount produced using this method can not meet demand, mostly dependent on import.Moreover, domestic natural rutile amount is few,
Therefore high ferrotianium method is prepared as raw material using rutile at home also to be difficult to be widely applied.
The third method is fused salt electrolysis process, and it is by titanyl compound and iron and its oxidation that molten-salt electrolysis, which prepares ferro-titanium,
The blended sintering of thing electrode processed, in fused salt carrying out electroreduction prepares alloy, has the advantages that flow is short, energy-saving and environmental protection, and one
It is directly the focus for preparing Titanium research, but molten-salt electrolysis prepares technique also no realization industrialization of Titanium, in experimental study
During also exist some can not solve the problems, such as and overcome.
Also it is easy that high cost of material, preparation technology complexity, impurity content are faced with the existing technique for preparing ferro-titanium
The problems such as exceeded, high to equipment requirement.
Panxi Diqu possesses the titanium ore resource of very abundant, mainly produces low-grade and middle product using thermit reduction at present
Position ferrotianium, the technique that high ferrotianium is prepared using titanium ore as raw material are also to be studied.
The content of the invention
It is an object of the invention to provide a kind of preparation method of high ferrotitanium alloy, to solve cost of material in the prior art
Height, preparation technology are complicated, and impurity content is easily exceeded, especially oxygen content is exceeded, it is high to equipment requirement the problem of.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：
A kind of preparation method of high ferrotitanium alloy, including：The raw material ilmenite concentrate 1.9- of high ferrotitanium alloy will be prepared
2.5wt%, titanium dioxide 36.5-37.5wt%, high titanium slag 6.5-7.5wt%, ferrosilicon 2.8-3.5wt%, lime 4.8-
5.5wt%, aluminium powder 21.5-23.3wt%, calcirm-fluoride 4.5-5.2wt%, potassium chlorate 16.5-17.5wt% and magnesium powder
0.8-1.5wt% is placed in reacting furnace, and reacting furnace is warming up into 1145-1160 DEG C under vacuum, after being incubated 1-5min
Natural cooling cools, and after question response furnace temperature is down to room temperature, obtained reaction product is carried out into de- Slag treatment, high ferrotianium is made and closes
Gold.
The present invention is using ilmenite concentrate, titanium dioxide and high titanium slag as titanium material, using ferrosilicon as chalybeate, using aluminium powder as reducing agent, with
Lime and calcirm-fluoride are slag former, and using magnesium powder as igniting agent, reduction reaction is occurring for heating reduction under vacuum, raw material
Simultaneously because reaction system air pressure reduces under vacuum, reaction is promoted to carry out (such as 2 [O]=O to the right2), so as to realize that degassing obtains
Hypoxic high ferrotitanium alloy, reduce the content of impurity oxygen in alloy.The present invention adds titanium dioxide in the feed, not only can be with
As titanium material, and the activity of titanium dioxide in reaction system can be improved, so as to improve the reproducibility of overall titanium material.This
The ferrosilicon of invention, chalybeate is served not only as, while ferrotianium fusing point can also be reduced, so as to reduce reaction temperature so that whole reduction
Reaction can be carried out under conditions of significantly lower than existing smelting temperature (1350-1550 DEG C), reduced energy consumption, also reduced
Requirement to consersion unit, moreover, the element silicon contained in ferrosilicon is also used as generating the reducing agent of silica.The present invention
Also, during the course of the reaction by exothermic heat of reaction, heat is provided to smelt, so as to reduce equipment as exothermic mixture added with potassium chlorate
To the supply of heat, energy consumption is reduced.
The present invention prepares the high ferrotianium that titaniferous amount is good, impurity content is low under vacuum by controlling raw material proportioning
Alloy.
Further, in preferred embodiments of the present invention, above-mentioned preparation method also includes：Before reacting furnace is entered,
Ilmenite concentrate, titanium dioxide and high titanium slag were crushed to 150-200 mesh sieves, by ferrosilicon, lime, aluminium powder, calcirm-fluoride, potassium chlorate with
And magnesium powder was crushed to 80-100 mesh sieves respectively.
The present invention increases response area, accelerates reaction speed by the way that reaction raw materials are crushed.Particle size was
The titanium material and particle size of 150-200 mesh sieves be the ferrosilicon of 80-100 mesh sieves, lime, aluminium powder, calcirm-fluoride, potassium chlorate with
And magnesium powder, it can both ensure that rapid reaction was carried out, and can avoid luming because particle is meticulous again.
Further, in preferred embodiments of the present invention, in heating, the units of heat of control reacting furnace furnace charge offer
For 2700-2900kJ/kg raw materials.
Reacted under conditions of supply heat is 2700-2900kJ/kg raw materials, material in reaction system can be made smooth
Fusing, and slag iron realizes good separation.Moreover, the furnace charge heat 3100-3300kJ/kg raw material phases provided with existing process
Than present invention only requires 2700-2900kJ/kg raw materials, can effectively reduce the heat needed for raw material, save the energy, reduce into
This.
It should be noted that unit：" kJ/kg raw materials ", expression is meant, needs to provide 2700- per 1kg raw materials
2900kJ heats.
Further, in preferred embodiments of the present invention, the heating rate of above-mentioned reacting furnace is 8-12 DEG C/min.
The high ferrotitanium alloy that above-mentioned preparation method is prepared.
Further, in preferred embodiments of the present invention, the chemical composition of above-mentioned high ferrotitanium alloy is：Ti 66.5-
67.4wt%, O 1.72-1.8wt%, Al 3.56-3.7wt%, Si 0.74-0.8wt%, P 0.022-0.03wt%,
S 0.023-0.031wt%, surplus Fe.
The invention has the advantages that：
The preparation method of the present invention is simple, easy to operate, and the impurity content such as oxygen of obtained ferro-titanium is low, efficiently solves
The high ferrotianium production technology of tradition is to problems such as the dependence of high-quality titanium resource and product impurity content height, the high ferrotianium produced
Alloy can be used as high-end Ti-containing steel raw materials for production.The titanium material that the present invention uses is cheap and easy to get, has saved production cost, and
Obtained high ferrotitanium alloy meets process for making requirement, improves titanium recovery rate, is advantageous to the comprehensive reutilization of titanium resource.
Embodiment
The principle and feature of the present invention are described with reference to embodiments, the given examples are served only to explain the present invention,
It is not intended to limit the scope of the present invention.Unreceipted actual conditions person in embodiment, suggest according to normal condition or manufacturer
Condition is carried out.Agents useful for same or the unreceipted production firm person of instrument, it is the conventional products that can be obtained by commercially available purchase.
Ilmenite concentrate used in the embodiment of the present invention is the titanium ore of Panzhihua Region, and titanium dioxide and high titanium slag are then titanium essence
The accessory substance of ore deposit.
Reacting furnace used in the embodiment of the present invention is vacuum drying oven.It should be evident that the feelings of vacuum condition can met
Other reacting furnaces can also be used under shape, for example, reacting furnace is vertical reacting furnace, during smelting, vertical reacting furnace is placed in vacuum
Reacted in room.
Embodiment 1：
The preparation method of the high ferrotitanium alloy of the present embodiment, including：
(1) raw material prepares：
Enter reacting furnace before, ilmenite concentrate, titanium dioxide and high titanium slag were crushed to 150 mesh sieves, by ferrosilicon, lime,
Aluminium powder, calcirm-fluoride, potassium chlorate and magnesium powder were crushed to 80 mesh sieves respectively.
(2) vacuum reaction：
Raw material ilmenite concentrate 1.9wt%, titanium dioxide 36.5wt%, high titanium slag 6.5wt%, the ferrosilicon of high ferrotitanium alloy will be prepared
2.8wt%, lime 4.8wt%, aluminium powder 23.3wt%, calcirm-fluoride 5.2wt%, potassium chlorate 17.5wt% and magnesium powder 1.5wt%
It is placed in reacting furnace.Reacting furnace is warming up to 1145 DEG C with 8 DEG C/min speed under vacuum, control reacting furnace furnace charge carries
The units of heat of confession is 2900kJ/kg raw materials.Natural cooling cools after being incubated 5min., will after question response furnace temperature is down to room temperature
Obtained reaction product carries out de- Slag treatment, and high ferrotitanium alloy is made.
Embodiment 2：
The preparation method of the high ferrotitanium alloy of the present embodiment, including：
(1) raw material prepares：
Enter reacting furnace before, ilmenite concentrate, titanium dioxide and high titanium slag were crushed to 200 mesh sieves, by ferrosilicon, lime,
Aluminium powder, calcirm-fluoride, potassium chlorate and magnesium powder were crushed to 100 mesh sieves respectively.
(2) vacuum reaction：
Raw material ilmenite concentrate 2.5wt%, titanium dioxide 37.5wt%, high titanium slag 7.5wt%, the ferrosilicon of high ferrotitanium alloy will be prepared
3.5wt%, lime 5.5wt%, aluminium powder 21.5wt%, calcirm-fluoride 4.5wt%, potassium chlorate 16.5wt% and magnesium powder 1wt% are put
In reacting furnace.Reacting furnace is warming up to 1160 DEG C with 12 DEG C/min speed under vacuum, control reacting furnace furnace charge carries
The units of heat of confession is 2700kJ/kg raw materials.Natural cooling cools after being incubated 1min., will after question response furnace temperature is down to room temperature
Obtained reaction product carries out de- Slag treatment, and high ferrotitanium alloy is made.
Embodiment 3：
The preparation method of the high ferrotitanium alloy of the present embodiment, including：
(1) raw material prepares：
Enter reacting furnace before, ilmenite concentrate, titanium dioxide and high titanium slag were crushed to 180 mesh sieves, by ferrosilicon, lime,
Aluminium powder, calcirm-fluoride, potassium chlorate and magnesium powder were crushed to 90 mesh sieves respectively.
(2) vacuum reaction：
Raw material ilmenite concentrate 2.4wt%, titanium dioxide 37.2wt%, high titanium slag 6.8wt%, the ferrosilicon of high ferrotitanium alloy will be prepared
2.9wt%, lime 5.2wt%, aluminium powder 23wt%, calcirm-fluoride 4.8wt%, potassium chlorate 16.9wt% and magnesium powder 0.8wt% are put
In reacting furnace.Reacting furnace is warming up to 1150 DEG C with 10 DEG C/min speed under vacuum, control reacting furnace furnace charge carries
The units of heat of confession is 2800kJ/kg raw materials.Natural cooling cools after being incubated 3min., will after question response furnace temperature is down to room temperature
Obtained reaction product carries out de- Slag treatment, and high ferrotitanium alloy is made.
Embodiment 4：
The preparation method of the high ferrotitanium alloy of the present embodiment, including：
(1) raw material prepares：
Enter reacting furnace before, ilmenite concentrate, titanium dioxide and high titanium slag were crushed to 150-200 mesh sieves, by ferrosilicon,
Lime, aluminium powder, calcirm-fluoride, potassium chlorate and magnesium powder were crushed to 80-100 mesh sieves respectively.
(2) vacuum reaction：
Raw material ilmenite concentrate 2.3wt%, titanium dioxide 37.1wt%, high titanium slag 6.9wt%, the ferrosilicon of high ferrotitanium alloy will be prepared
3.2wt%, lime 5.3wt%, aluminium powder 22.4wt%, calcirm-fluoride 4.7wt%, potassium chlorate 16.9wt% and magnesium powder 1.2wt%
It is placed in reacting furnace.Reacting furnace is warming up to 1150 DEG C with 10 DEG C/min speed under vacuum, controls reacting furnace furnace charge
The units of heat of offer is 2800kJ/kg raw materials.Natural cooling cools after being incubated 2min.After question response furnace temperature is down to room temperature,
Obtained reaction product is subjected to de- Slag treatment, high ferrotitanium alloy is made.
It should be noted that the embodiment of the present invention is not specifically limited to vacuum, i.e. reaction is carried out under vacuum
, those skilled in the art can be configured according to the actual conditions of equipment.
Comparative example 1：
The preparation method of this comparative example is same as Example 4, differs only in, and raw material proportioning is different, specific as follows：
Ilmenite concentrate 3wt%, titanium dioxide 36.4wt%, high titanium slag 6.9wt%, ferrosilicon 3.2wt%, lime 5.3wt%, aluminium powder
22.4wt%, calcirm-fluoride 4.7wt%, potassium chlorate 16.9wt%, magnesium powder 1.2wt%.
The raw material proportioning, compared with Example 4, mainly reduces the content of titanium dioxide, and its ratio is reduced into 36.4wt%,
The proportion limited beyond the present invention, and the ratio of other material components is more or less the same with embodiment 4, and all at this
In the limited proportion of invention.
Comparative example 2：
The preparation method of this comparative example is same as Example 4, differs only in, and raw material proportioning is different, specific as follows：
Ilmenite concentrate 2.3wt%, titanium dioxide 37.1wt%, high titanium slag 6.6wt%, ferrosilicon 4wt%, lime 5.3wt%, aluminium powder
22wt%, calcirm-fluoride 4.6wt%, potassium chlorate 16.9wt%, magnesium powder 1.2wt%.
The raw material proportioning, compared with Example 4, mainly adds the content of ferrosilicon, and its ratio is increased into 4wt%, surpasses
Go out the proportion that the present invention is limited, and the ratio of other material components is more or less the same with embodiment 4, and all in this hair
In bright limited proportion.
Chemical composition detection, detection knot are carried out to high ferrotitanium alloy made from above-described embodiment 1-4 and comparative example 1-2
Fruit is shown in Table 1.
The high ferrotitanium alloy composition of table 1
As it can be seen from table 1 high ferrotitanium alloy made from the embodiment of the present invention meets that the chemical composition of high ferrotitanium alloy will
Ask, wherein impurity content meets the quality requirement of high ferrotitanium alloy within prescribed limit.
High-quality titanium material (titanium dioxide, high titanium slag) proportioning used reduces in comparative example, and titanium oxide reducing property is deteriorated, reduction
Obtained titanium amount is reduced, and the impurity content such as O, C in high ferrotianium, which is made, substantially to be increased.Analyze contrast and experiment to find, using this
Experimental method prepares the preferable raw material proportioning of the high ferrotianiums of 70#：Ilmenite concentrate 2.3wt%, titanium dioxide 37.1wt%, high titanium slag
6.9wt%, ferrosilicon 3.2wt%, lime 5.3wt%, aluminium powder 22.4wt%, calcirm-fluoride 4.7wt%, potassium chlorate 16.9wt%, magnesium
Powder 1.2wt%.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (6)
- A kind of 1. preparation method of high ferrotitanium alloy, it is characterised in that including：The raw material ilmenite concentrate of high ferrotitanium alloy will be prepared 1.9-2.5wt%, titanium dioxide 36.5-37.5wt%, high titanium slag 6.5-7.5wt%, ferrosilicon 2.8-3.5wt%, lime 4.8-5.5wt%, aluminium powder 21.5-23.3wt%, calcirm-fluoride 4.5-5.2wt%, potassium chlorate 16.5-17.5wt% and magnesium Powder 0.8-1.5wt% is placed in reacting furnace, and reacting furnace is warming up into 1145-1160 DEG C under vacuum, is incubated 1-5min Natural cooling cools afterwards, after question response furnace temperature is down to room temperature, obtained reaction product is carried out into de- Slag treatment, high ferrotianium is made Alloy.
- 2. the preparation method of high ferrotitanium alloy according to claim 1, it is characterised in that the preparation method also includes： Before reacting furnace is entered, the ilmenite concentrate, the titanium dioxide and the high titanium slag were crushed to 150-200 mesh sieves, by institute State ferrosilicon, the lime, the aluminium powder, the calcirm-fluoride, the potassium chlorate and the magnesium powder and be crushed to 80-100 respectively Mesh sieve.
- 3. the preparation method of high ferrotitanium alloy according to claim 2, it is characterised in that in heating, control reacting furnace The units of heat that furnace charge provides is 2700-2900kJ/kg raw materials.
- 4. the preparation method of the high ferrotitanium alloy according to claim any one of 1-3, it is characterised in that the reacting furnace Heating rate be 8-12 DEG C/min.
- 5. the high ferrotitanium alloy that the preparation method described in claim any one of 1-4 is prepared.
- 6. high ferrotitanium alloy according to claim 5, it is characterised in that the chemical composition of the high ferrotitanium alloy is： Ti66.5-67.4wt%, O1.72-1.8wt%, Al3.56-3.7wt%, Si0.74-0.8wt%, P0.022- 0.03wt%, S0.023-0.031wt%, surplus Fe.
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| CN101225483A (en) * | 2007-01-19 | 2008-07-23 | 苏永山 | Ferrotitanium alloy electric furnace smelting method |
| CN103555974A (en) * | 2013-10-24 | 2014-02-05 | 攀枝花学院 | Method of producing high-titanium-iron alloy by virtue of aluminum-magnesium process |
| CN104152694A (en) * | 2014-09-05 | 2014-11-19 | 攀枝花学院 | Calcium-magnesium-titanium method for producing high ferrotitanium alloy |
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2017
- 2017-09-15 CN CN201710837991.2A patent/CN107557600A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225482A (en) * | 2007-01-19 | 2008-07-23 | 苏永山 | Ferrotitanium alloy electric induction furnace smelting method |
| CN101225483A (en) * | 2007-01-19 | 2008-07-23 | 苏永山 | Ferrotitanium alloy electric furnace smelting method |
| CN103555974A (en) * | 2013-10-24 | 2014-02-05 | 攀枝花学院 | Method of producing high-titanium-iron alloy by virtue of aluminum-magnesium process |
| CN104152694A (en) * | 2014-09-05 | 2014-11-19 | 攀枝花学院 | Calcium-magnesium-titanium method for producing high ferrotitanium alloy |
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