CN1060820C - Low-silicon Ti-iron and its preparing method - Google Patents
Low-silicon Ti-iron and its preparing method Download PDFInfo
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- CN1060820C CN1060820C CN97107131A CN97107131A CN1060820C CN 1060820 C CN1060820 C CN 1060820C CN 97107131 A CN97107131 A CN 97107131A CN 97107131 A CN97107131 A CN 97107131A CN 1060820 C CN1060820 C CN 1060820C
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Abstract
The present invention provides ferrotitanium with low silicon and a preparation method thereof, wherein the ferrotitanium with low silicon is suitable to be used in smelting deep drawing thin steel sheets. The ferrotitanium with low silicon is prepared by taking titanium ore concentrate and waste material of titanium products as raw material and adopting a melting method combining an aluminothermy method and a remelting method. The grain size of the used aluminum is from 0.45mm to 0.125mm, and the titanium ore concentrate is reduced by aluminium shots when the waste material of titanium products is remelted. The present invention has the characteristics of less investment, convenient and reliable preparation method, relatively lower production cost, low impurity content of finished products, small content variation range of titanium, higher content of contained aluminum, capability of improving the yield of titanium in the production process of steel making, etc. The present invention provides favourable external conditions for the development of purification of the quality of steel materials.
Description
The invention belongs to technical field of iron alloy production, particularly with ilmenite concentrate and titanium material waste material together as raw material, the melting method that adopts thermite process and remelting process to combine, and with low-Si-Ti-Fe of the reduction of particulate state aluminum shot, remelting preparation and preparation method thereof.The low-Si-Ti-Fe of the present invention's preparation is suitable for deep drawing sheet, especially is suitable for the low-Si-Ti-Fe that automobile is used with the IF smelting steel.
Along with to steel-smelting technology particularly to the research of refining techniques, make CONTROLLING BAD ELEMENT IN in the steel can reach quite satisfied degree, answer blowing technology, SECONDARY REFINING IN A VACUUM CHAMBER or the like as various molten iron pre-desulfurization technology, converter that development in recent years is got up, provide comparatively perfect process means for smelting ultrapure clean no gap steel.
Because the continuous development of steel-smelting technology, steel industry has also proposed the requirement of high purityization to making steel used iron alloy, wish that the iron alloy impurities element that drops in the molten steel is low as far as possible, particularly to must strictly controlling, in order to avoid molten steel is caused secondary pollution at the iron alloy impurities element of steel-making input in refining period.
As everyone knows, the deep drawing sheet steel of high-elongation be with titanium as the alloying agents of steel, generally adopt the method that in the liquid steel refining stove, adds ferrotianium to carry out.Therefore, it wishes that impurity elements such as contained Si, C are low as far as possible in the ferrotianium, although because elements such as Si, C can increase the intensity of steel to a certain extent, unit elongation and deep drawing quality all are affected.
But, the conventional FeTi30 of domestic production at present, its titaniferous amount is about 30%, and silicon content is about 4%, and carbon content can't satisfy the requirement of this steel grade between 0.08%～0.1%.
In molten steel, add metal titanium, can satisfy the low requirement of foreign matter content undoubtedly, but metal titanium fusing point height (1670 ℃ of ≈), the little (4.5g/cm of density
3), drop into behind the molten steel owing to less being easy to of its density floated on the surface, and, influence steel product quality because the higher and difficult fusing of its fusing point with regard to causing the fluctuation of titanium elements recovery rate easily, causes titaniferous amount instability in the steel like this.
Adding high ferrotianium (FeTi70) in molten steel also is a kind of method.High ferrotianium fusing point low (1100 ℃ of ≈), dropping into behind the molten steel can very fast fusing, and foreign matter content is also lower, can satisfy the requirement of high quality steel grade.But high ferrotianium is to add the iron remelting with metal titanium as raw material to form, and because of the influence that is subjected to the metal titanium resource is difficult to scale operation, is difficult to satisfy so a large amount of needs of steel-making industry.Therefore, this method is wanted penetration and promotion, also has big difficulty at present.
Produce growing needs in order fully to satisfy steel industry, the preparation low-Si-Ti-Fe just seems especially urgent.Particularly along with the fast development of industries such as processing industry, adnornment industry, civilian goods industry, titanium material waste material amount (as sheet material scrap stock, car wound bits etc.) also will increase thereupon, therefore, how to adopt useless titanium material as raw material, directly adopt ilmenite concentrate to prepare low-Si-Ti-Fe simultaneously,, reduce cost in the hope of materials recycling, and satisfy the needs of steel product quality, just seem important especially to pureization development.People are for it and effort.As the disclosed patent No. of Chinese patent is 95113728, respectively is called the preparation method of ferro-titanium; With the patent No. be 96117080, name is called a kind of preparation method etc. of high ferrotianium, all having provided with useless titanium material is that raw material adds the method that the iron remelting prepares ferrotianium, and claims according to its disclosed data, the content of elements such as its Si, C has all reached quite low few level.But the former melting in the crucible of vacuum induction furnace, the latter then is melting in the open type electrical heater.Really the latter compares with the former, and it is less to have an investment, reliable, substantial progress such as production cost is lower easy and simple to handle, but take a broad view of above two technical schemes, it is bigger still to exist investment, electric power energy consumption height, production cost is higher, and is subjected to the deficiencies such as restriction of titanium material waste material resource.
The object of the present invention is to provide a kind of method for preparing low-Si-Ti-Fe, reduce the foreign matter content of its finished product, to overcome the deficiencies in the prior art.
The technical scheme that realization the present invention's purpose is taked, be as reductive agent and remelting heat-generating agent with aluminum shot, with titanium material waste material and ilmenite concentrate together as raw material, the melting method of taking thermite process and remelting process to combine, and carrying out according to following steps successively: select materials on request, toast; Distinguish compounding major ingredient, refining material and priming mixture by weight ratio; The bed material that major ingredient that a certain amount of compounding is good and priming mixture are formed drops into smelting furnace; Excite priming mixture with " flourishing "; Treat to add major ingredient after the bed material reaction forms liquid-bath; Add titanium material waste material; Add the refining material; Add top of the slag retardant lime powder; Deslagging; Dial behind the naturally cooling and the ferrotianium ingot is dropped into water flowing cooling in the water tank after abandoning smelting furnace stove tube; The finishing screening;
And the granularity of said aluminum shot is 0.4-0.125mm;
And the grain/lumpiness≤150mm of said titanium material waste material, or piece weight＜3Kg;
And said time＜10 that add titanium material waste material minute; Add time＜4 minute of refining material;
And said major ingredient is made up of ilmenite concentrate, aluminum shot, iron scale, lime powder and Potcrate, and its weight percentage (%) is: ilmenite concentrate 57, aluminum shot 31, iron scale 2.5, lime powder 7.5, Potcrate 2;
And said refining material is by aluminum shot, iron scale, and lime powder, Potcrate is formed, and its weight (kg) proportioning is aluminum shot 131, iron scale 342, lime powder 50, Potcrate 48;
And said priming mixture is by aluminum shot, iron scale, and SODIUMNITRATE is formed, and its weight (kg) proportioning is aluminum shot 5, iron scale 6, SODIUMNITRATE 4;
And the chemical ingredients of its prepared low-Si-Ti-Fe (%) is:
Ti Si Al C S P Fe
35-45≤2.5≤12≤0.05≤0.02≤0.02 surplus.
The present invention is the smelting process that adopts aluminum shot reduction ilmenite concentrate and seasoning metal titanium material waste material to carry out simultaneously.In aluminum shot reduction ilmenite concentrate, in reduction reaction furnace, add fritter shape metal titanium incessantly, utilize the heat of thermite process reaction that metal titanium is melted, and reaction product is mixed equably, make the titaniferous amount of reaction product rise to the grade of expection; In prescription, drop into excessive aluminium simultaneously, make it the main aluminium titanium compound that forms in reaction,, and the silicon content in the reaction product is controlled to the expection requirement with the formation of silicon-titanium compound in the inhibition alloy.
In sum; the present invention's preparation method; be that thermite process and remelting process are combined; carry out simultaneously with aluminum shot reduction ilmenite concentrate and remelting titanium material waste material; it is easy to be reliable to have the preparation method; invest less relatively; cost is relatively low; its final product (low-Si-Ti-Fe) foreign matter content is low; titanium elements content range fluctuation is little, contains the aluminium of high level, can improve characteristics such as the recovery rate of titanium elements in the STEELMAKING PRODUCTION and deoxidizing capacity; for ferro-titanium develops the new preparation approach of having opened up to the high purity direction, to satisfy the needs of steel product quality to pureization development.
The invention will be further described below with reference to drawings and Examples.
A kind of preferred embodiment of the present invention following (seeing also accompanying drawing 1--process flow sheet):
1, equipment:
Main have a 8m
2Reflection (single thorax) stove, 1.2m
3Mixer, material storage tube, 3m
3The rotary drum mixer, 5m
3Intermediate bunker, smelting furnace (footpath 1460mm in the stove tube, height 1250mm), cooling water tank.
2, raw material:
(1) ilmenite concentrate:
TiO
2〉=48% SiO
2≤ 1.5% ∑ Fe≤35% C, S, P are all≤0.02%
(2) aluminum shot:
Al≥99％ Si≤0．5％
Granularity 0.45～0.125mm (40～120 order)
(3) metal titanium (being titanium material waste material):
Ti≥95％ Al≤5％ Si≤0．15％
Granularity≤150mm or piece are heavy less than 3Kg
(4) iron phosphorus:
∑Fe≥65％ SiO
2≤1．5％
Granularity≤0.9mm (20 order)
(5) lime:
CaO≥90％ C≤0．4％
Granularity≤2mm (10 order)
(6) Potcrate:
KClO
3≥99．5％
Granularity≤2mm (10 order)
3, proportioning raw materials:
(1) major ingredient (Kg/ criticizes): ilmenite concentrate 950/4,518/ batch of aluminum shot, iron scale 40/4, lime powder 120/4, Potcrate 30/4.(by 4 batches of weighing and burdens of above weight fraction)
(2) refining material (Kg): aluminum shot 131, iron scale 342, lime powder 50, Potcrate 48.
(3) priming mixture (Kg): aluminum shot 5, iron scale 6, SODIUMNITRATE 4.
(4) titanium material waste material 660Kg.
4, operation steps.
(1) raw material is prepared
A, metal titanium (being titanium material waste material)
Not of uniform size because of the metal titanium scrap stock, need before use the metal titanium processing treatment of classifying.
A, thickness≤15mm shear its size through Q11-15 * 2500 sheet shearss
Little 150 * 150 * 15mm
B, thickness＞15mm cut through oxy-acetylene flame, and its monolithic weight is not more than 3Kg.
C, car shavings become piece to handle through T58L-100 screw mandrel packing machine, and its density is
4.0～4.5g/cm
3, volume is not more than 250 * 250 * 100mm.
The baking of B, ilmenite concentrate, iron scale
8m is dropped in ilmenite concentrate, iron scale subregion
2Baking in single thorax reverberatory furnace, temperature are shown by the idol measurement to be controlled.Temperature controlling range is 700～900 ℃.Ilmenite concentrate is to drop in the stove with every crowd of 950Kg to toast preheating, and every batch of ilmenite concentrate storing time is 30～40 minutes, stirs ilmenite concentrate one time in per 5～8 minutes during toasting, in case the top layer sintering.The ilmenite concentrate tapping temperature is controlled at 400～450 ℃.Iron scale is baking in the disposable input stove, and layering claws during use, and tapping temperature is 200～250 ℃.
C, lime
After lime is purchased go back to factory, need sort processing, remove the impurity such as living ash, dying embers and coke in the lime, be stored in the watertight chest subsequently, during use earlier the screen cloth with 1.2mm (16 order) sieve, removal efflorescence lime, pass through φ 900 * 1800 dry ball ball millings subsequently after, through the screen cloth screening of 2mm (10 order), granularity is stand-by less than the lime powder delivery material place of 2mm (10 order).
(2) batching operation
Batching operation is that in accordance with regulations ratio of components becomes mixture charge with various preparation of raw material.
The charge of each stove melting ferrotianium is made up of four batches of major ingredients, a collection of refining material and priming mixture, joins major ingredient during batching earlier, joins the refining material again, joins priming mixture at last.
At first prepare major ingredient.Batching should----lime--iron scale--ilmenite concentrate be a preface to Potcrate, according to material is poured in the mixer, directly contacts with aluminum shot, Potcrate with ilmenite concentrate, the iron scale that prevents red heat after the accurate measurement, avoids furnace charge balling or presence of fire explosion hazard with aluminum shot.
After every batch of major ingredient prepares, it is added carry out batch mixing in the rotary drum mixer.Mixing time is no less than 10 minutes.After batch mixing finished, mixed material was all poured in the material storage tube of mixer bottom, put in the middle feed bin of people by the driving handling and with compound.
After four batches of major ingredients prepare, begin to prepare the refining material again.Batching should--order of Potcrate--lime--iron scale be carried out, and carries out batch mixing after preparing with aluminum shot.Mixing time is no less than 10 minutes, and mixed material is contained in the material storage tube in order to smelting.
Priming mixture (aluminum shot 5Kg, iron scale 6Kg, SODIUMNITRATE 4Kg) prepares the artificial stirring and evenly mixing in back and gets final product.
(3) smelting operation
Melting is to carry out in smelting furnace (middle footpath 1460mm, high 1250mm).The stove tube of smelting furnace is to be combined by four cast iron sheets, presents the taper shape young, that end opening is big, and the bolt by M36 * 250 between the cast iron sheet connects.
There is a groove two cast iron sheet connection places, will clog tight in the groove with mending material.Mending material is to be mixed by magnesia, refractory mortar and magnesium chloride solution.After mending the stove cylinder base is dropped on the magnesia substrate, make the magnesia nest of the bottom of a pan shape in stove, the sand nest should be done closely knitly, and the magnesia granularity on sand nest top layer is less than 1.2mm simultaneously.
In four cast iron sheets, there is a slice highly to locate to be provided with a slag notch, slag notch mending material jam-pack at 700mm.
The lower point pyrogenic process is adopted in melting.At first in the sand nest, put into major ingredient about 100Kg as " bed material " and priming mixture.Excite priming mixture to cause the reaction of bed material with " flourishing ", after forming the molten bath, the bed material reaction promptly begins to add major ingredient, should feed in raw material slowly at first and make material gently and equably be sprinkling upon on the molten bath, expansion along with the molten bath, feeding quantity (feed rate) increases gradually, and will adjust reinforced angle and feeding quantity at any time according to the reaction condition in the stove.
After major ingredient adds and reacts normally, can in smelting furnace, add titanium material waste material, all titanium material waste materials should add within 10 minutes and finish.
Above smelting time should be controlled between 15～16 minutes.
Treat to add the refining material immediately after above-mentioned melting reaction finishes, the refining material will add in time, evenly and concentrate, and all the refining material should add in the stove in 2～4 minutes.
After refining material reaction finishes, promptly in smelting furnace, add the 100Kg lime powder, purpose is to make top of the slag slow setting, is beneficial to that gas remaining in the stove is got rid of smoothly and the abundant sedimentation of ferrotianium pearl, treat 10～12 minutes after, disclose open cinder notch deslagging.
So far melting finishes.
(4) cooling finishing
Stay slag in the stove and ferrotianium ingot behind 16 hours naturally cooling, take out the stove tube, and with ferrotianium ingot handling water flowing cooling to the cooling water tank.Cooled ferrotianium ingot is delivered to Runout area and is carried out finishing, screening, packing.
(5) finished product
(1) gets above furnace charge and adopt preparation method of the present invention to smelt, can get finished product heavy 3350Kg in kind.
(2) Chemical Composition of finished product is through chemical examination consequently:
Ti Si Al C S P Fe
39.97 1.35 11.16 0.027 0.013 0.018 surpluses
Chemical equation of the present invention is as follows:
CaOAl
2O
3(calcium aluminate) can effectively reduce the fusing point of slag liquid, improves the flowability of slag liquid and the reactive behavior of metallic aluminium.
Facts have proved that it is easy to be reliable that the present invention has the preparation method, less investment, the finished product foreign matter content is low, and stable components can be saved characteristics such as metal titanium resource and steel-making effect are good.
The present invention also can with high ferrotianium (FeTi70) replace titanium material waste material and with ilmenite concentrate as the feedstock production low-Si-Ti-Fe; Also can press a certain amount of proportioning, come instead of titanium material waste material, and prepare low-Si-Ti-Fe as raw material with ilmenite concentrate with titanium material waste material and high ferrotianium.
Claims (1)
1, a kind of with the preparation method of aluminum shot as the low-Si-Ti-Fe of reductive agent and remelting heat-generating agent, it is characterized in that, it is a raw material with ilmenite concentrate and titanium material waste material, the melting method of taking thermite process and remelting process to combine, and carry out according to following steps successively: select materials on request, toast; Distinguish compounding major ingredient, refining material and priming mixture by weight ratio; The bed material that a certain amount of major ingredient and priming mixture are formed drops into smelting furnace; Excite priming mixture with " flourishing "; Treat in smelting furnace, to add major ingredient after the bed material reaction forms the molten bath; Add titanium material waste material; Add the refining material; Add top of the slag retardant lime powder; Deslagging; Cooling; The finishing screening; And said major ingredient is made up of ilmenite concentrate, aluminum shot, iron scale, lime powder and Potcrate, and its weight percentage (%) is: ilmenite concentrate 57, aluminum shot 31, iron scale 2.5, lime powder 7.5, Potcrate 2; And said refining material is by aluminum shot, iron scale, and lime powder, Potcrate is formed, and its weight (kg) proportioning is an aluminum shot 131, iron scale 342, lime powder 50, Potcrate 48; And said priming mixture is by aluminum shot, iron scale, and SODIUMNITRATE is formed, and its weight (kg) proportioning is an aluminum shot 5, iron scale 6, SODIUMNITRATE 4; And the granularity of said aluminum shot is 0.45mm-0.125mm, the grain/lumpiness≤150mm of said titanium material waste material, or piece weight＜3kg; And add titanium material waste material time＜10 minute, add refining material time＜4 minute; And the chemical ingredients of its prepared low-Si-Ti-Fe (%) is:
Ti Si Al C S P Fe
35-45≤2.5≤12≤0.05≤0.02≤0.02 surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97107131A CN1060820C (en) | 1997-09-26 | 1997-09-26 | Low-silicon Ti-iron and its preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97107131A CN1060820C (en) | 1997-09-26 | 1997-09-26 | Low-silicon Ti-iron and its preparing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1183481A CN1183481A (en) | 1998-06-03 |
| CN1060820C true CN1060820C (en) | 2001-01-17 |
Family
ID=5169314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97107131A Expired - Fee Related CN1060820C (en) | 1997-09-26 | 1997-09-26 | Low-silicon Ti-iron and its preparing method |
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| Country | Link |
|---|---|
| CN (1) | CN1060820C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2549820C1 (en) * | 2013-10-29 | 2015-04-27 | Инна Петровна Боровинская | Method for aluminothermic obtainment of ferroalloys |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1323183C (en) * | 2005-04-15 | 2007-06-27 | 李春德 | Method for jpreparing high ferrotitanium in use for smelting steel |
| CN100334247C (en) * | 2005-10-11 | 2007-08-29 | 江苏江南铁合金有限公司 | Low-Si-Ti-Fe for smelting Ti-containing steel |
| CN100485064C (en) * | 2007-01-23 | 2009-05-06 | 梅卫东 | Composite heat generating agent in use for producing ferrotitanium |
| CN105603293B (en) * | 2016-03-30 | 2017-08-25 | 攀枝花市银江金勇工贸有限责任公司 | To climb western titanium material electric furnace melting down method production ferro-titanium |
| CN106834880B (en) * | 2017-02-14 | 2019-01-18 | 东北大学 | A kind of preparation method of ferro-titanium |
| CN116790924B (en) * | 2023-08-25 | 2023-11-17 | 北京理工大学 | Method for preparing refractory high-entropy alloy by remelting return materials through electron beam melting |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1101080A (en) * | 1993-09-28 | 1995-04-05 | 峨眉山市汇海经济技术开发公司 | Method for producing high-titanium iron by thermit process |
-
1997
- 1997-09-26 CN CN97107131A patent/CN1060820C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1101080A (en) * | 1993-09-28 | 1995-04-05 | 峨眉山市汇海经济技术开发公司 | Method for producing high-titanium iron by thermit process |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2549820C1 (en) * | 2013-10-29 | 2015-04-27 | Инна Петровна Боровинская | Method for aluminothermic obtainment of ferroalloys |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1183481A (en) | 1998-06-03 |
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