CN1017811B - Low-aluminium silicon-titanium-iron alloy and its producing process - Google Patents
Low-aluminium silicon-titanium-iron alloy and its producing processInfo
- Publication number
- CN1017811B CN1017811B CN 90100816 CN90100816A CN1017811B CN 1017811 B CN1017811 B CN 1017811B CN 90100816 CN90100816 CN 90100816 CN 90100816 A CN90100816 A CN 90100816A CN 1017811 B CN1017811 B CN 1017811B
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- China
- Prior art keywords
- ferrosilicon
- titanium
- content
- rutile
- low
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- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Finishing Walls (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The present invention relates to the technical field of ferro-titanium alloy. The present invention relates to a low-aluminum silicon ferro-titanium alloy product produced by taking 65% to 95 % of titanium ore concentrate and 5% to 35 % of rutile as main raw materials according to a certain proportion by a material mixing method, and the low-aluminum silicon ferro-titanium alloy contains at least 30% of Ti, at most 10% of Si and at most 4.0% of Al. The physical and chemical parameters of the product meet the requirements for particular stainless steel, wherein the requirements are proposed by the metallurgy department of Taiyuan iron and steel company. The product is used as a degassing agent for steel manufacture and an additive for producing alloy elements. In addition, the product can also be used as paint for producing electric welding rods. The low-aluminum silicon ferro-titanium alloy can improve the quality of a stainless steel product by being used as an additive. The production cost can be reduced by more than 2 % compared with the production cost for producing FeTi30, and the recovery rate of Ti is larger than 70%.
Description
The present invention relates to the technique of ferro-titanium in the metallurgy, especially for a kind of be the production method that main raw material is produced low-aluminium silicon-titanium-iron alloy with rutile, ilmenite concentrate.
At present, the domestic main FeTi30 that uses is as stainless titanium elements additive, and this ferrotianium adopts thermite process production.According to GB GB3282-87 regulation, Ti content is 25-35% in this ferrotianium, Al＜8.5%, Si content＜5.0%.In stainless production, what FeTi30 added lacks, and then the Ti composition does not reach index request, and reaches in the stainless steel of composition requirement, and the content of Al but increases.In the stainless steel, the aluminum content height, then easily oxidation of surface, smooth finish is poor, forms hen-claw cracking, causes the stainless steel plate quality scale to reduce.If reduce the Al content among the FeTi30, then the rate of recovery of metal titanium is low.
The objective of the invention is to avoid the weak point in the above-mentioned prior art, and a kind of manufacture method of low-aluminium silicon-titanium-iron alloy is provided.In the low-aluminium silicon-titanium-iron alloy of producing by this method, the content of Ti is 30-40%, Al≤4.0%.And in this ferro-silico-titanium, Si≤10.0%, (silicotitanium Si15-20%) thus guarantee stainless steel produce in the rate of recovery of Cr.
The present invention is achieved in that
According to the particular requirement of the production of external ferro-silico-titanium and service condition and China's Special Alloy Steel to the ferro-titanium variety and quality, the condition of producing rutile and ferro-titanium for many years in conjunction with our factory (Gongxian county, Henan Province rutile factory), we have taked with rutile, ilmenite concentrate is main raw material, improve processing parameter and formulate new technological flow, research and trial-produceed " manufacture method of low-aluminium silicon-titanium-iron alloy " successfully, the Chemical Composition of its product sees attached list 1.
Details are as follows for manufacture method of the present invention:
In the prior art, when producing FeTi30, use be TiO
2Content is that the ilmenite concentrate of 49-52% is as main raw material, should raise with Ti and Al content locking phase in this ilmenite concentrate production FeTi30 alloy product, and the institute of ilmenite concentrate iron-holder own is gone into alloy and is reached the required iron amount of alloy ingredient, then the refining material can't add the ferric oxide heat-generating agent, makes like this in the slag to reclaim more than 10% less by recoverable Ti.Produce low-aluminium silicon-titanium-iron alloy with manufacture method of the present invention and then solved this problem.
Its concrete manufacture method is:
1, main raw material: rutile (TiO
2〉=87%S≤0.04%P≤0.04%C≤0.06%) accounts for 5-35%; Ilmenite concentrate (TiO
2Content is 49-52%) account for 65-95%; Or contain TiO
2〉=58% ilmenite concentrate (100%); Or natural rutile (TiO
2Content 〉=58%) (100%).The purpose of making is to improve TiO in the raw material like this
2Content.
Aluminum shot: aluminium content is 90-98%,
Ferrosilicon: 75
#Ferrosilicon.
2, batching:
Si/Ti is 0.17-0.32 in the alloy
Fe/TiO in the major ingredient
2Be 0.48-0.60
Design Ti content is 30-40%
Strong heat-generating agent Potcrate (KClO
3), consumption is in every 100kg titaniferous materials, adds the Potcrate of 1-5kg, purpose is to improve reaction to guarantee heat, fast reaction speed.
3, technical process:
Aluminum shot, ferrosilicon are mixed stirring earlier; Again iron phosphorus, Potcrate are stirred, add lime again and stir.The ilmenite concentrate that roasting is good (temperature 550-750 ℃) leaves in the heat-preservation cylinder.At first add rutile, add the mixture of aluminum shot and ferrosilicon then, successively be layered on above the ilmenite concentrate equably, mix and stirred 1 minute, add the mixture of iron phosphorus, Potcrate, lime again, stirred 1 minute, mixed temperature should be controlled at 200-250 ℃.Add aluminium-ferric oxide heat-generating agent at the bottom of the smelting furnace, smelt.Be 6-9 minute tap to tap time.
4, temperature control:
550-750 ℃ of ilmenite concentrate maturing temperature
Major ingredient mixes 200-250 ℃ of back temperature
200-250 ℃ of refining material temperature
Smelting furnace casing temperature 〉=110 ℃
Smelting furnace furnace bottom magnesia temperature 〉=150 ℃
The embodiment of the invention:
Raw materials used and the source:
Artificial rutile our factory product TiO
2〉=87%
The iron phosphorus Luoyang Fe of steel mill＞66%
Dressing-works, Wanning, ilmenite concentrate Hainan Province TiO
249-52%
The CaO of lime Gongxian county Jia Jinkou Lime Factory 〉=85%
Potcrate Gongxian county Potcrate factory content＞95%
The 75# of ferrosilicon Gongxian county ferrosilicon factory
The aluminum shot our factory produces Al 90-98%
Raw materials used Chemical Composition sees attached list 2.
Raw materials used charger sheet sees attached list 3.
A kind of low-aluminium silicon-titanium-iron alloy product that can improve the stainless steel product quality as alloy addition.Ti content 30-40% in its composition, Si≤10%, Al≤4.0%, other Chemical Composition meets the standard of GB3282-87FeTi30-A.Its manufacture method is:
Main raw material: rutile (TiO
2〉=87%) accounts for 5-35%; Ilmenite concentrate (TiO
2Content is 49-52%) account for 65-95%; Or employing contains TiO
2〉=58% ilmenite concentrate (100%), or adopt natural rutile (TiO
2〉=58%) (100%).
Aluminum shot: aluminium content 90-98%,
Ferrosilicon: 75
#Ferrosilicon.
All raw material granularities are not more than 2mm.
Batching:
Si/Ti is 0.17-0.32 in the alloy
Fe/TiO in the major ingredient
2Be 0.48-0.60
Design Ti content is 30-40%
In every 100kg titaniferous materials, add the Potcrate of 1-5kg.
Working Procedure Controlling:
Aluminum shot, ferrosilicon mix stirring earlier;
Iron phosphorus, Potcrate mixing stirring;
After iron phosphorus, Potcrate mix stirring, again with lime mixing stirring;
Ilmenite concentrate, rutile and aluminum shot mix stirring with the mixture of ferrosilicon;
The mixture of ilmenite concentrate, rutile and aluminum shot, ferrosilicon stirs with the mixture of iron phosphorus, Potcrate, lime again;
The smelting furnace furnace bottom adds aluminium iron monoxide heat-generating agent;
The compound that has stirred is added smelting furnace to be smelted;
Be 6-9 minute tap to tap time.
The Chemical Composition of obtained product and performance index see attached list 4.
The physico-chemical analysis list of obtained product sees Appendix 1.
Accompanying drawing 1 is low-aluminium silicon-titanium-iron alloy technological process of production figure of the present invention.(1) in the schema, (2), (3), (4) are order of addition(of ingredients) number.
Good effect of the present invention:
1, produces Ti content with ilmenite concentrate and increased a new technology greater than 30% ferro-titanium series of products for domestic, opened up a new production ways.
2, this product is as additive, satisfied during China's stainless steel produces: the requirement of Al＜0.05%, Si＜1.0%, Ti＜1.2%, can improve the quality of stainless steel product significantly.
3, the production cost of low-aluminium silicon-titanium-iron alloy reduces more than 2% than the FeTi30 cost of alloy that the our factory produces.
4, the smelting recovery of titanium is greater than 70%, and the rate of recovery of external titanium be to the maximum 59.24%(see reference document 4).
Subordinate list 1
Chemical analysis %
Country origin trade mark remarks
Ti C Al Si S P
Soviet Union one-level 25-35＜0.1＜4.0 15-20＜0.02＜0.04 document that sees reference
Taiyuan Iron and Steel Co. index 30-40≤0.15≤4.0≤10.0＜0.035＜0.04
Product reaches 30-40≤0.15≤4.0≤10.0＜0.035＜0.04 Gongxian county rutile factory
Subordinate list 2
Raw material chemical analysis %
Title TiO2∑Fe FeO SiO
2CaO Al Si KClO
3S P C
Rutile 87.88 2.4 1.62 3 0.02 0.002 0.03 40 order all-pass
Ilmenite concentrate 52.25 33.47 32.7 3 0.02 0.04 0.06
Iron phosphorus 72.89 56.76 5 0.01 0.001 0.04 40 order all-pass
Aluminum shot 97.1 1 1.8mm all-pass
Ferrosilicon powder 71.2 0.003 0.03 40 order all-pass
Lime 2＞85 0.03 2mm all-pass
Potassium chlorate＞95 2mm all-pass
Subordinate list 3
Expect other rutile titanium concentrate aluminum shot iron phosphorus ferrosilicon lime potassium chlorate remarks
Major ingredient 25 75 40.68 9.5 6.87 8.77 1.6 units (kg)
Fine fodder 2.88 13 0 1.1 units (kg)
Subordinate list 4
Returning of ferrotianium titanium
Project weight Al Ti Si P S C Cu Mn
Kg yield %
Design 8024≤4.0 36.68 70≤10.0 0.04 0.03 0.10 0.40 2.5
Actual 8,120 3.90 25.87 70.52 5.52 0.038 0.024 0.087 0.34 2.3
Reference:
1, iron alloy metallurgy
(West Germany) G.Volket chief editor, twilight sunset is translated
Shanghai science tech publishing house publishes in October, 1978
2, ferroalloy smelting
(Soviet Union) M.A Leix work, Zhou Jinhua, Yu Zhongyi
Beijing metallurgical industry press publishes in October, 1986
3, brief talk the production and the application of titaniferous alloying constituent
Author: Mo Shuchi, Wang Zuoyao, Li Rongxun
General Institute of Iron and Steel, Ministry of＜atallurgical Industry
The fifth phase in 1987 " iron alloy " magazine
4, al-si-thermal method reduction beach sand, ilmenite
Yang Yucheng is translated from " Transactions of the indian Institute of Metal " Vol.37, No.3, June1984.
Claims (1)
1, a kind ofly can improve the manufacture method of the low-aluminium silicon-titanium-iron alloy product (Ti content 30-40% in the composition, Si≤10.0%, Al≤4.0%) of stainless steel product quality, it is characterized in that as alloy addition:
A, raw material: rutile (TiO
2〉=87% S≤0.04% P≤0.04% C≤0.06%) accounts for 5-35%, ilmenite concentrate (TiO
2Content is 49-52%) account for 65-95%,
Aluminum shot: aluminium content is 90-98%,
Ferrosilicon: 75
#Ferrosilicon;
B, batching:
Si/Ti is 0.17-0.32 in the alloy
Fe/TiO in the major ingredient
2Be 0.48-0.60
In every 100kg titaniferous materials, add the Potcrate of 1-5kg,
Design Ti content is 30-40%;
C, Working Procedure Controlling:
Aluminum shot, ferrosilicon mix stirring earlier,
Iron phosphorus, Potcrate stir,
After iron phosphorus, Potcrate mix stirring, again with lime mixing stirring,
Ilmenite concentrate, rutile and aluminum shot mix stirring 1 minute with the mixture of ferrosilicon,
The mixture of ilmenite concentrate, rutile and aluminum shot, ferrosilicon was stirred 1 minute with the mixture of iron phosphorus, Potcrate, lime again,
At the bottom of smelting furnace, add aluminium-ferric oxide heat-generating agent,
Compound is added smelting furnace smelt, be 6-9 minute tap to tap time;
D, temperature control:
550-750 ℃ of ilmenite concentrate maturing temperature
Major ingredient mixes 200-250 ℃ of back temperature
200-250 ℃ of refining material temperature
Smelting furnace casing temperature 〉=110 ℃
Smelting furnace bottom temperature 〉=150 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90100816 CN1017811B (en) | 1990-02-23 | 1990-02-23 | Low-aluminium silicon-titanium-iron alloy and its producing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90100816 CN1017811B (en) | 1990-02-23 | 1990-02-23 | Low-aluminium silicon-titanium-iron alloy and its producing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1044959A CN1044959A (en) | 1990-08-29 |
| CN1017811B true CN1017811B (en) | 1992-08-12 |
Family
ID=4876820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90100816 Expired CN1017811B (en) | 1990-02-23 | 1990-02-23 | Low-aluminium silicon-titanium-iron alloy and its producing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1017811B (en) |
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 |
| CN100371481C (en) * | 2006-04-11 | 2008-02-27 | 李春德 | Method for producing high titanium iron contg. low oxygen and low nitrogen |
| CN100376701C (en) * | 2006-04-17 | 2008-03-26 | 海南高钛科技股份有限公司 | Method for preparing low-silicon high-titanium ferroalloy employing lower ignition method |
| CN102392133B (en) * | 2011-10-28 | 2013-08-07 | 中信锦州金属股份有限公司 | Production method of ferrotitanium |
| CN112813351B (en) * | 2021-01-06 | 2022-06-14 | 鞍钢股份有限公司 | High manganese steel and smelting method thereof |
| CN112853026B (en) * | 2021-01-06 | 2022-10-18 | 鞍钢股份有限公司 | Manganese alloying method for smelting high manganese steel by converter |
-
1990
- 1990-02-23 CN CN 90100816 patent/CN1017811B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1044959A (en) | 1990-08-29 |
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