CN100334247C - Low-Si-Ti-Fe for smelting Ti-containing steel - Google Patents
Low-Si-Ti-Fe for smelting Ti-containing steel Download PDFInfo
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- CN100334247C CN100334247C CNB200510094826XA CN200510094826A CN100334247C CN 100334247 C CN100334247 C CN 100334247C CN B200510094826X A CNB200510094826X A CN B200510094826XA CN 200510094826 A CN200510094826 A CN 200510094826A CN 100334247 C CN100334247 C CN 100334247C
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Abstract
The present invention belongs to the technical field ferroalloys, which relates to a ferroalloy, particularly to low-silicon-titanium-ferrum for smelting steel containing titanium. The low-silicon-titanium-ferrum is particularly suitable for smelting IF steel for motor vehicles. The low-silicon-titanium-ferrum mainly contains the following components: 38 to 42 wt% of titanium, 8 to 12 wt% of aluminum, 0.8 to 1.5 wt% of silicon, 0.02 to 0.05 wt% of carbon, 0.01 to 0.02 wt% of phosphorus, 0.01 to 0.02 wt% of sulfur, 0.1 to 0.15 wt% of copper, 1.5 to 2 wt% of manganese and ferrum as the rest. 5 the method is used for preparing the low-silicon-titanium-ferrum by taking titanium ore concentrate as raw material and adopting an aluminothermy melting method. The present invention has the advantages of simple and reliable preparation method, less investment and lower cost, and impurity content in finished products is low, which is favorable to control the existence of trace elements.
Description
Affiliated technical field
The invention belongs to the iron alloy technical field, relate to a kind of iron alloy, especially a kind of low-Si-Ti-Fe that is used to smelt Ti-containing steel, this low-Si-Ti-Fe especially are suitable for smelting automobile IF steel.
Background technology
Along with the development of the concise technology of various steel-making, people can be relatively easy to control the harmful element in the steel, thereby improve the performance of steel grade, to be fit to the needs of different process industries.Thereby steel industry also proposed the requirement of high purityization to making steel used iron alloy, wishes that the iron alloy impurities element that drops in the molten steel is low as much as possible, in order to avoid molten steel is caused secondary pollution.
As everyone knows, the deep-draw sheet plate of high-elongation be with titanium as the alloying agents of steel, generally adopt the method that in the concise stove of molten steel, adds ferrotianium to obtain.Therefore, it requires in the ferrotianium, and impurity elements such as institute is siliceous, carbon, sulphur, phosphorus are low as much as possible, otherwise, can influence the unit elongation and the deep drawing quality of finished steel.But ferrotianium, especially high ferrotianium add the iron remelting with metal titanium and form, and because of being subjected to the restriction of metal titanium resource, are difficult to large-scale production, are difficult to satisfy the so large-scale needs of steel-making industry.So the low-Si-Ti-Fe and preparation method thereof that directly adopts ilmenite concentrate to make steel-making usefulness arises at the historic moment, as Chinese patent ZL97107131.4, name is called " preparation method of low-Si-Ti-Fe ", the preparation method of disclosed a kind of low-Si-Ti-Fe, it is as reductive agent and remelting heat-generating agent with aluminum shot, with titanium material waste material and ilmenite concentrate is raw material together, and the melting method that adopts thermite process and remelting process to combine makes.But still be subjected to the restriction of useless titanium resource, when smelting steel, to the deoxidation of molten steel and control steel the size of primary grain under austenitic state, help that effect is not fairly obvious aspect the utilizing of valuable element titanium, and smelt the steel that with it and preventing to wear out, be not very desirable aspect plastic performance, anti-atmospheric corrodibility and the favorable mechanical processing characteristics.
Summary of the invention
The object of the present invention is to provide a kind ofly contain trace element, effective deoxidation and control austenite primary grain size, improve the utilization ratio of valuable element titanium when steel are smelted, and can improve the Corrosion Protection and the machining property of finished steel, the low-Si-Ti-Fe that is used to smelt Ti-containing steel that foreign matter content is low.
The present invention is achieved by the following technical solutions: a kind of low-Si-Ti-Fe that is used to smelt Ti-containing steel, and it mainly contains titanium, aluminium and iron, also contains silicon, carbon, phosphorus, sulphur, copper and manganese, and the each component weight percent is: titanium 38-42; Aluminium 8-12; Silicon 0.8-1.5; Carbon 0.02-0.05; Phosphorus 0.01-0.02; Sulphur 0.01-0.02; Copper 0.1-0.15; Manganese 1.5-2; Iron surplus.
Because among the present invention, requirement contains an amount of aluminium, like this when steel-making, because the existence of aluminium element can be played the effect of deoxidation and control steel size of primary grain when austenitic state on the one hand, can combine with titanium on the other hand, form the aluminium titanium compound, thereby suppress the formation of silicon-titanium compound in the alloy, the content of harmful element silicon in the alloy is controlled to the requirement of expection, the existence of an amount of aluminium in the finished steel in addition can prevent the aging of steel and improve its plasticity-; The existence of trace copper in the finished steel can improve the resistibility of steel to atomospheric corrosion; The existence of trace manganese helps improving the mechanical propertys such as deep processing performance of steel.
The present invention adopts thermite process preparation, and the preparation method is simple and reliable, less investment, cost are lower, and foreign matter content is low in the finished product, helps the existence and the control of trace element.
Embodiment
A kind of low-Si-Ti-Fe that is used to smelt Ti-containing steel, it mainly contains titanium, aluminium and iron, also contains silicon, carbon, phosphorus, sulphur, copper and manganese, and the each component weight percent is: titanium 38-42; Aluminium 8-12; Silicon 0.8-1.5; Carbon 0.02-0.05; Phosphorus 0.01-0.02; Sulphur 0.01-0.02; Copper 0.1-0.15; Manganese 1.5-2; Iron surplus.
The above-described preparation method who is used to smelt the low-Si-Ti-Fe of Ti-containing steel is a raw material with ilmenite concentrate and rutile, adopts the melting method of thermite process to make.Specifically carry out according to following steps successively, select materials on request, toast; Distinguish compounding major ingredient, refining material and priming mixture by weight ratio, major ingredient is made up of ilmenite concentrate, rutile, aluminum shot, iron phosphorus, lime, oxidation heat-generating agent, concise material is made up of aluminum shot, iron phosphorus, lime, oxidation heat-generating agent, and priming mixture is made up of aluminum shot, iron phosphorus, SODIUMNITRATE; The bed material that a certain amount of major ingredient and priming mixture are formed drops into smelting furnace; With the flourishing priming mixture that excites; Question response drops into major ingredient after forming the molten bath in smelting furnace; After treating that the major ingredient reaction finishes; Add the refining material; Add top of the slag retardant lime powder; Deslagging; Cooling; The finishing screening.
Below be the preferred embodiment of the invention, prepare the low-Si-Ti-Fe that is used to smelt Ti-containing steel of the present invention.
1, equipment:
Major equipment is: reverberatory furnace, mixer, material storage tube, rotary drum mixer, intermediate bunker, smelting furnace, cooling water tank etc.
2, ingredient requirement:
Ilmenite concentrate: Ti0
2〉=48%, SiO
2≤ 1.5%, ∑ Fe≤35%, C, S, P are all≤0.02%;
Rutile: TiO
2〉=90%, SiO
2≤ 1.5%, C, S, P are all≤0.02%;
Aluminum shot: Al 〉=99%, Si≤0.5%, granularity 0.45～0.125mm (40～120 order);
Iron phosphorus: ∑ Fe 〉=65%, Si≤1.5%, granularity≤0.9mm (20 order);
Lime: CaO 〉=90%, C≤0.4%, granularity≤2mm (10 order);
Potcrate KClO
3〉=99.5%, granularity≤2mm (10 order).
3, raw material is formed:
Above raw material, be divided into different operation materials by suitable proportioning and step, use for subsequent operations,
Major ingredient: ilmenite concentrate: rutile: aluminum shot: iron phosphorus: lime: Potcrate is 57: 11: 31: 2.5: 7.5: 2;
Concise material: aluminum shot: iron phosphorus: lime: Potcrate is 131: 342: 50: 48;
Priming mixture: aluminum shot: iron phosphorus: SODIUMNITRATE is 5: 6: 4.
4, smelting operation:
More than the operation materials that prepare according to the following steps, carry out smelting operation:
In smelting furnace, at first make a magnesia nest, in the magnesia nest, put into major ingredient then as " bed material " and priming mixture, adopt the lower point pyrogenic process, excite priming mixture to cause the reaction of bed material with " flourishing ", continue to add major ingredient after the bed material reaction forms the molten bath, amount and adding speed that major ingredient adds should increase along with the expansion in molten bath and accelerate, and add until major ingredient.
After treating that above-mentioned melting reaction finishes, add concise material immediately fast and equably.
When concise material in smelting furnace, react finish after, promptly in smelting furnace, add lime powder, its objective is to make top of the slag slow setting, be beneficial to that gas remaining in the stove is got rid of smoothly and the abundant sedimentation of ferrotianium pearl.Bleed off the waste residue in the smelting furnace after for some time.Melting finishes, treat the finished product naturally cooling in the smelting furnace after, further after the water-cooled, send Runout area to carry out finishing, screening, packing again.
By above method, the low-Si-Ti-Fe that is used to smelt Ti-containing steel that melting obtains, the chemical ingredients result of laboratory test of finished product is as follows:
Titanium 39; Aluminium 8.5; Copper 0.1; Manganese 1.5; Silicon 1.35; Carbon 0.025; Phosphorus 0.015; Sulphur 0.015; Iron surplus.
The low-Si-Ti-Fe that is used to smelt Ti-containing steel of the present invention is measured through the Shanghai Baosteel is on probation, and production cost reduces, and the low-Si-Ti-Fe amount of use is few and can reach better effect, has saved titanium resource, has good social benefit and economic benefit.
Claims (1)
1. low-Si-Ti-Fe that is used to smelt Ti-containing steel, it mainly contains titanium, aluminium and iron, also contains silicon, carbon, phosphorus, sulphur, copper and manganese, it is characterized in that the each component weight percent is: titanium 38-42; Aluminium 8-12; Silicon 0.8-1.5; Carbon 0.02-0.05; Phosphorus 0.01-0.02; Sulphur 0.01-0.02; Copper 0.1-0.15; Manganese 1.5-2; Iron surplus.
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|---|---|---|---|
| CNB200510094826XA CN100334247C (en) | 2005-10-11 | 2005-10-11 | Low-Si-Ti-Fe for smelting Ti-containing steel |
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| CNB200510094826XA CN100334247C (en) | 2005-10-11 | 2005-10-11 | Low-Si-Ti-Fe for smelting Ti-containing steel |
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| CN1752259A CN1752259A (en) | 2006-03-29 |
| CN100334247C true CN100334247C (en) | 2007-08-29 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101008053B (en) * | 2007-01-23 | 2010-04-07 | 梅卫东 | Method for preparing ferrotitanium and silicon ferrotitanium using high magnesium and low titanium concentrate |
| CN105002422B (en) * | 2015-07-13 | 2017-01-04 | 苏州金业船用机械厂 | A kind of high rigidity Anti-pressure propeller blade |
| CN105907966A (en) * | 2016-04-13 | 2016-08-31 | 浙江三龙催化剂有限公司 | Method for preparation of rare earth alloy by treatment of waste SCR catalyst in submerged-arc furnace and rare earth alloy |
| CN105779772A (en) * | 2016-04-13 | 2016-07-20 | 浙江三龙催化剂有限公司 | Method for preparing rare earth alloys through waste SCR catalysts reclaimed through electric arc furnace in classifying manner |
| CN105779795A (en) * | 2016-04-13 | 2016-07-20 | 浙江三龙催化剂有限公司 | Rare earth alloy refined through waste catalysts reclaimed by high-frequency furnace or medium-frequency furnace and preparation method of rare earth alloy |
| CN105907971A (en) * | 2016-04-29 | 2016-08-31 | 浙江三龙催化剂有限公司 | Method for preparing rare earth alloy by recycling waste SCR catalysts through vacuum furnace in graded mode |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1183481A (en) * | 1997-09-26 | 1998-06-03 | 江苏江南铁合金厂 | Low-silicon Ti-iron and its preparing method |
| RU2247791C1 (en) * | 2003-10-31 | 2005-03-10 | Федеральное Государственное Унитарное Предприятие "Центральный Научно-Исследовательский Институт Конструкционных Материалов "Прометей" (Фгуп "Цниии Км "Прометей") | Low-carbon high-purity ferrotitanium |
-
2005
- 2005-10-11 CN CNB200510094826XA patent/CN100334247C/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1183481A (en) * | 1997-09-26 | 1998-06-03 | 江苏江南铁合金厂 | Low-silicon Ti-iron and its preparing method |
| RU2247791C1 (en) * | 2003-10-31 | 2005-03-10 | Федеральное Государственное Унитарное Предприятие "Центральный Научно-Исследовательский Институт Конструкционных Материалов "Прометей" (Фгуп "Цниии Км "Прометей") | Low-carbon high-purity ferrotitanium |
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