CN101713027A - Iron trapping and casing technological method in FeV50 smelting by electro-silieothermic process - Google Patents
Iron trapping and casing technological method in FeV50 smelting by electro-silieothermic process Download PDFInfo
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- CN101713027A CN101713027A CN200910167777A CN200910167777A CN101713027A CN 101713027 A CN101713027 A CN 101713027A CN 200910167777 A CN200910167777 A CN 200910167777A CN 200910167777 A CN200910167777 A CN 200910167777A CN 101713027 A CN101713027 A CN 101713027A
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Abstract
The invention discloses an iron trapping and casing technological method in FeV50 smelting by an electro-silieothermic process. The method is characterized by adopting a container which integrates a refining slag tank, a ladle and an ingot mould, has a steel shell and a lining made of refractory, is provided with a slag outlet and a slag discharge chute in the middle and shape like a refining slag tank; moreover, the upper part of the container is larger than the lower part thereof.. The invention provides a technological process that the contents of silicone (Si) and vanadium (V) in alloy liquid in the furnace must be treated to be completely qualified during refining; the refining slag in the furnace is poured into the refining slag tank through the slag outlet; the vanadium and ferrum alloy liquid in the furnace is poured into the ladle; the vanadium and ferrum alloy liquid in the ladle is cast into the ingot mould; the refining slag in the refining slag tank is returned to the smelting furnace in hot state for the production of next round; after being cooled for a certain time, the alloy liquid in the ingot mould is demoulded and finished. The invention can reduce stirring times in the furnace during refining, shortening refining time, facilitate the protection of the furnace liner, enhance furnace life and reduce oxidization loss of the vanadium at high temperature, and has the advantages of high direct yield of metals, little consumption, low cost, good product quality, low labor strength, good operation environment and the like.
Description
One, technical field
The invention belongs to operative technique field in the iron alloy production process, particularly electro-silicothermic process is produced in the FeV50 trade mark vanadium iron process, taps a blast furnace and casting system ingot processing method.
Two, background technology
The content of vanadium in the earth's crust is not low, is 0.02%, but disperses very much, and with other element associations together, do not have independent navajoite.Extracting the raw material of vanadium, substantially all is to extract the by product that other elements produced, and extracts vanadium from those by products, and production technique is very complicated.So people also range rare metal to vanadium.The purposes of vanadium is very extensive.Industry and agriculture such as iron and steel, coloured, chemical industry, electronic ceramics, glass, aerospace, nuclear power all will be used vanadium.But the consumption maximum is Iron And Steel Industry, accounts for more than 80%.Vanadium has oxygen and the nitrogen of sloughing in the steel, the crystal grain of refinement steel and the effect that improves the recrystallization temperature of steel.Thereby in steel, need only interpolation a little some vanadium (being generally 0.05～0.8%), and just can improve the performance of steel significantly, improve the intensity and the toughness of steel.So most steel grades all contain a certain amount of vanadium more or less.So the consumption of vanadium is very big.Vanadium is as the additive of steel-making, in general all form adding steel with vanadium iron.And in China, based on use habit and support equipment, facility, the vanadium iron of the FeV50 trade mark is almost only liked to use by each Iron and Steel Production factory.
The method of producing vanadium iron has thermite process (claiming perrin process again) and electro-silicothermic process.Produce FeV50 trade mark vanadium iron, requiring on the cost and to starting material, electro-silicothermic process is better than thermite process.Up to the present, except that not possessing the private small business of electro-silicothermic process working condition individually, what the producer of the production FeV50 trade mark vanadium iron of the whole nation more than 90% all adopted is electro-silicothermic process.Tapping a blast furnace and casting system ingot in the production process, what all adopt is the traditional technology method.As: invention 00116109.1 " the V2O3 electro-aluminothermic process is smelted FeV80 technology " belongs to the vanadium metallurgical technology field, its raw material is made of V2O3, aluminium powder, abrasive grit and lime, technological process is for putting into electrosmelting behind V2O3, aluminium powder, abrasive grit and the lime batch mixing, come out of the stove and carry out shrend after isolating slag smelting the alloy mixture that, carry out break-iron, fragmentation, screening, packing at last and handle.FeV50 smelting technology of the present invention has greatly reduced product cost, technological process is simple relatively, the finished product vanadium recovery has reached more than 94.5%, the content of V, C, Si, P, S, Al, Mn has reached the technological standard requirement, the technology power consumption is low, single stove alloy output height, surface quality and crystalline condition are good, and the quantity of slag is few.Invention 01129148.6 " electric heating process smelt produce furnace charge agglomeration technology ", it is pitch to be pulverized or made emulsified bitumen or dissolve, and adds an amount of animal or plant glue, then with the furnace charge mixing, the furnace charge piece is gone in repressed again moulding conduct.Solved and adopted other tackiness agents to be not suitable for electric heating process smelting production, be difficult to produce the problem of suitable furnace charge piece.Not only broken, the powder furnace charge of originally throwing aside can be obtained utilizing; And can use the coal dust coke for replacing, and replace steel scrap with steel rolling chip or iron ore, cause the furnace charge piece to use in the lump as furnace charge them.The present invention has the furnace charge piece that is easy to realize, produce and is fit to electric heating process smelting production, the characteristics that can save the resource and the energy, reduce production costs.Iron alloy series product such as the ferrosilicon that can be widely used in adopting electric heating process to smelt producing, ferromanganese, and in the production of products such as yellow phosphorus, silicon, calcium carbide.Invention 00812521.X " Metal smelting method and metal melting equipment ", this invention provide the low and productivity highland of a kind of cost the metal oxide of iron ore etc. with (or) the metal hydroxides melting and reducing becomes the method for metallic solution.For this reason will be in advance at least will the metal oxide of iron ore etc. and (or) metal hydroxides and charcoal processing material mixing, or mix-make ball, the mixture material that mixing-shaping obtains, give reduction in the reduction furnace giving of formula and rotary kiln type etc. at the bottom of the rotary kiln, make metal oxide and (or) the average degree of metalization of metal hydroxides is 5～55%, pack in the dissolving stove that Metal smelting uses through giving the reductive mixture material, in this dissolving stove is reducing material with the charcoal processing material, and be main thermal source with the combustion heat of the combustion heat of this charcoal processing material and the carbon monoxide that in stove, generates, dissolve and final reduction.Can obtain excellent energy balance and high productivity with such method, the metallic solution of production molten iron etc.Invention 00116108.3 " the V2O3 electro-aluminothermic process is smelted FeV50 technology ", belong to the vanadium metallurgical technology field, its raw material is made of V2O3, aluminium powder, abrasive grit and lime, technological process is for putting into electrosmelting behind V2O3, aluminium powder, abrasive grit and the lime batch mixing, come out of the stove and carry out shrend after isolating slag smelting the alloy mixture that, carry out break-iron, fragmentation, screening, packing at last and handle.FeV50 smelting technology of the present invention has greatly reduced product cost, technological process is simple relatively, the finished product vanadium recovery has reached more than 94.5%, the content of V, C, Si, P, S, Al, Mn has reached the technological standard requirement, the technology power consumption is low, single stove alloy output height, surface quality and crystalline condition are good, and the quantity of slag is few.
The oxide compound that the traditional technology method produces and the metal fragment particle of slag inclusion band can not enter product, are generally 3～5% of the amount of tapping a blast furnace.Hot metal ladle that the traditional technology method is many is to the ingot mould casting process, and during cast, molten iron splashes and can't stop at all, and the molten iron in the ingot mould is many more, and the molten iron spatter loss is big more.In the traditional technology method, some faults or accident can often appear, as hot metal ladle leakage (particularly during bottom pour mold, hot metal ladle is easier bottom pour ladle, stopper brick fault such as do not open to occur), the ingot mould leakage all is often to occur, and these all will have a strong impact on the direct yield of metal.
Three, summary of the invention
It is steel shell, the inner lining refractory of one that the present invention has adopted collection refining slag ladle, hot metal ladle, an ingot mould, up big and down small, half waist has a slag notch and the chute of slagging tap, be similar to the container of smart slag ladle apperance, whole refining slag and alloy liquid in the splendid attire stove, it is as follows that it taps a blast furnace, pours into a mould the operating process of system ingot:
The first step: during refining, silicon (Si), vanadium (V) content in the stove in the alloy liquid are handled near qualified can coming out of the stove.
Second step: the refining slag in the stove, alloy liquid are poured into the container from iron notch together, but will be accomplished to go out earlier refining slag, after tap a blast furnace, realize stove outer desiliconization increasing vanadium effect (slag tap, when tapping a blast furnace, require flow more greatly, more help the outer desilication reaction of stove).
The 3rd step: the refining slag heat in the container is returned in the smelting furnace, carried out next stove and smelt production.
The 4th step: the alloy liquid in the container, through behind the naturally cooling of certain hour, its alloy cake that solidifies is poured out, fragmentation, finishing becomes product.
The present invention and traditional technology method relatively have following advantage:
1, can reduce stirring number of times in the stove refining period, shorten refining time, help protecting furnace lining, improve furnace life.
Electro-silicothermic process is smelted in the FeV50 vanadium iron process, and the purified purpose is exactly under suitable temperature and basicity of slag and strong mixing condition, utilizes suitable excessive Vanadium Pentoxide in FLAKES (V in the refining slag
2O
5) remove to take off silicon unnecessary in the alloy liquid (Si), improve vanadium in the alloy liquid (V) content simultaneously, make product composition satisfy standard-required or customer requirements.Its principle is:
And be rich in V in the refining slag
2O
5, turn back to next stove and recycle.
Stirring action is exactly to make the alloy liquid of furnace bottom and the top abundant contact reacts of slag (refining slag).So-called strong mixing condition stirs great efforts exactly, stirs often, and churning time is long.
Traditional technology method, desiliconization are carried out in stove fully, and before coming out of the stove, the Si in the alloy liquid, V will reach qualified and just can slag tap, and tap a blast furnace; And desilication reaction can take place in the present invention in the container in slagging tap, tapping a blast furnace process, and it just can replace the stirring operation of a part.So before coming out of the stove, the Si in the alloy liquid, V can slag tap and tap a blast furnace a suitable scope (need not be qualified fully).At identical smelting condition, the present invention and traditional technology method reduced and stir 1～2 time than refining period, shortened refining time 5～10 minutes, and furnace life is improved 5～10 stoves, and body of heater output promotes high 10～20 tons.
2, reduce vanadium oxidational losses at high temperature
Superalloy liquid of the present invention is poured in stove to container and is only exposed once air.And the traditional technology method, superalloy liquid is poured hot metal ladle in stove, be poured in the ingot mould from hot metal ladle again, in air, to expose twice, owing to when ingot mould is poured into a mould, dominant discharge and speed, the time ratio that superalloy liquid contacts in air taps a blast furnace and wants many more than one times, according to 4V+3O
2Δ 2V
2O
3Reaction principle, the time that superalloy liquid contacts with air is long more, vanadium is oxidized must be many more.Traditional technology method one stove will be poured into a mould 2～3 ingot moulds, the alloy ingot iron is that two is little broad in the middle cylindrical, just carry out the demoulding for the ease of finishing, fragmentation, general naturally cooling, the alloy pig of red heat is put into water chilling (claiming that water is broken) through 15～16 hours.Otherwise, just be difficult to the finishing fragmentation.After the demoulding, the alloy pig surface of red heat also can be by airborne dioxygen oxidation.And the present invention's one stove alloy liquid and refining slag; only pour in the container; after refining slag heat is returned smelting furnace; still leave one deck skull above and protecting alloy liquid not contact with air, general through behind 24 hours the naturally cooling, just pour out from container; profile is a truncated cone-shaped discus; thickness is generally less than 300mm, suitably waters some water quick coolings (even not watering sometimes) on the surface, just is easy to the finishing fragmentation.Measure according to us, due to above-mentioned two reasons, the oxide compound that the traditional technology method produces and the metal fragment particle of slag inclusion band can not enter product, are generally 3～5% of the amount of tapping a blast furnace, and the present invention is then less than 1%.
3, metal direct yield height
Hot metal ladle that the traditional technology method is many is to the ingot mould casting process, and during cast, molten iron splashes and can't stop at all, and the molten iron in the ingot mould is many more, and the molten iron spatter loss is big more.When particularly watering a full ingot mould and turning to another ingot mould cast, hot metal ladle is difficult to close tight, have in addition can't close.Molten iron just scatters on pouring pit ground.According to the mensuration in past, under the normal circumstances, molten iron splashes and causes direct yield to be reduced in about 1% in the casting process.
Adopt hot metal ladle to ingot mould pouring technology method, hot metal ladle is all wanted more remaining molten iron.When particularly tapping temperature was low, surplus iron water amount was just more.According to estimates, under the normal circumstances, also to influence metal direct yield about 0.5%.In the traditional technology method, some faults or accident can often appear, as hot metal ladle leakage (particularly during bottom pour mold, hot metal ladle is easier bottom pour ladle, stopper brick fault such as do not open to occur), the ingot mould leakage all is often to occur, and these all will have a strong impact on the direct yield of metal.The present invention does not have these processes, does not just have above-mentioned problem yet.
4, consumption is few, and cost is low
The present invention has only a container, and the thing that it consumed just has only the magnesia of the refractory materials of liner and stifled slag notch, the chute that taps a blast furnace.The used hot metal ladle of it and traditional technology method, the consumption of smart slag ladle can maintain an equal level fully, even also can be a little less.But in the traditional technology method, the consumption of many ingot moulds and being used to seals the consumption of ingot mould lid and the asbestos twine of junction at the bottom of the ingot mould.Produced FeV in 2002 according to certain ferroalloy works
50Vanadium titanium workshop cost data, the consumption of ingot mould (ingot mould lid, the end and semi-round ball) and the consumption amount of asbestos twine are 87 yuan of vanadium titaniums per ton, estimate to reach possibly more than 130 yuan now.
5, good product quality
The alloy pig that the traditional technology method is produced, the surface oxidation thickness generally seems to have about 0.5mm.Particularly the vanadium iron that top layer 50～80mm is thick all has the pore of diameter 3～8mm size, and visual appearance is very poor, and this part (be approximately total amount about 15%) do not seen very much.
The alloy pig that the present invention produced during owing to naturally cooling in container, has one deck refining slag protecting, and surface film oxide is extremely thin, and a pore does not have yet, and visual appearance is very good, we can say to the whole nation the first, is subjected to client's favorable comment deeply.
6, labour intensity is low, and operating environment is good
The present invention collection is slagged tap, taps a blast furnace, poured into a mould and makes ingot is one, has simplified several operation links, economization several (individual) equipment, also just reduced operator and be subjected to the high temperature heat radiation effect.After the traditional technology method goes out refining slag, taps a blast furnace, pours into a mould and pours, to clear up hot metal ladle immediately while hot (if do not clear up, slag and iron mix the thick more difficult cleaning of cooling), the employee will stand four high-temperature operations, and the present invention's just for once (when promptly coming out of the stove, employee will in operation under the hot conditions).
In sum, operating process of the present invention is short, use equipment is few, but the effect of each side is good, is that electro-silicothermic process is produced FeV
50In the trade mark vanadium titanium process, advanced, practical tap a blast furnace, the pouring technology method.
Four, description of drawings
Fig. 1 is smart slag ladle structure iron.
Fig. 2 is the hot metal ladle structure iron.
Fig. 3 is the ingot mould structure iron.
Fig. 4 is ingot mould lid structure iron.
Fig. 5 is an ingot mould bear building-up composition.
Fig. 6 is movable semi-round ball structure iron.
Fig. 7 is an overall construction drawing of the present invention.
Five, embodiment
Specifically introduce embodiment of the present invention with reference to the accompanying drawings.
Smart slag ladle: be generally cast steel.
Hot metal ladle: steel shell, inner lining refractory is generally the bottom cast.
Ingot mould is made up of three parts: at the bottom of ingot mould lid, the ingot mould, movable semi-round ball.
During use, in semi-round ball is put at the bottom of the ingot mould, put some bushel iron particles above; On the ingot mould lid was put at the bottom of the ingot mould, the ingot mould lid enclosed asbestos twines as sealing with seam crossing at the bottom of the ingot mould with 2～3.
Technological process:
The first step: during refining, the silicon (Si) in the stove in the alloy liquid, that the content of vanadium (V) two elements must be handled is qualified fully.
Second step: the refining slag in the stove is fallen in the refining slag ladle from slag notch.
The 3rd step: again the ferro-vanadium liquid in the stove is fallen in hot metal ladle.
The 4th step: again the ferro-vanadium liquid in the hot metal ladle is cast in the ingot mould.
The 5th step: refining slag heat in the smart slag ladle is returned in smelting furnace, carried out the production of next stove.
The 6th step: after the alloy liquid in the ingot mould cooled off through certain hour, demoulding finishing became product.
Claims (4)
1. an electro-silicothermic process smelting FeV50 taps a blast furnace and the casting process method, having it is characterized in that adopting collection refining slag ladle, hot metal ladle, an ingot mould is the steel shell of one, and inner lining refractory is up big and down small, half waist has a slag notch and the chute of slagging tap, and is similar to the container of smart slag ladle apperance; Its technological process is: during refining the content of the silicon in the alloy liquid in the stove (Si), vanadium (V) two elements handled qualified fully → refining slag in the stove is fallen in the refining slag ladle → the ferro-vanadium liquid in the stove is fallen in hot metal ladle → the ferro-vanadium liquid in the hot metal ladle is cast in the ingot mould → refining slag heat in the smart slag ladle is returned in smelting furnace from slag notch, carry out alloy liquid in the production → ingot mould of next stove through the certain hour cooling after, demoulding finishing becomes product.
2. a kind of electro-silicothermic process according to claim 1 is smelted FeV50 and is tapped a blast furnace and the casting process method, it is characterized in that hot metal ladle is a steel shell, and inner lining refractory is generally the bottom cast.
3. a kind of electro-silicothermic process according to claim 1 is smelted FeV50 and is tapped a blast furnace and the casting process method, it is characterized in that ingot mould for being generally cast steel or spheroidal graphite cast iron material, and ingot mould is made up of three parts: ingot mould covers, at the bottom of the ingot mould, movable semi-round ball.
4. a kind of electro-silicothermic process according to claim 1 is smelted FeV50 and is tapped a blast furnace and the casting process method, it is characterized in that semi-round ball puts at the bottom of the ingot mould, puts some bushel iron particles above; On the ingot mould lid was put at the bottom of the ingot mould, the ingot mould lid enclosed asbestos twines as sealing with seam crossing at the bottom of the ingot mould with 2～3.
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| CN200910167777A CN101713027A (en) | 2009-09-28 | 2009-09-28 | Iron trapping and casing technological method in FeV50 smelting by electro-silieothermic process |
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| CN200910167777A CN101713027A (en) | 2009-09-28 | 2009-09-28 | Iron trapping and casing technological method in FeV50 smelting by electro-silieothermic process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104084564A (en) * | 2014-07-18 | 2014-10-08 | 北京北冶功能材料有限公司 | Manganese-base alloy protective casting technology |
| CN104226916A (en) * | 2014-09-26 | 2014-12-24 | 衡阳中钢衡重铸锻有限公司 | Casting method of slag ladle and casting mold |
-
2009
- 2009-09-28 CN CN200910167777A patent/CN101713027A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104084564A (en) * | 2014-07-18 | 2014-10-08 | 北京北冶功能材料有限公司 | Manganese-base alloy protective casting technology |
| CN104226916A (en) * | 2014-09-26 | 2014-12-24 | 衡阳中钢衡重铸锻有限公司 | Casting method of slag ladle and casting mold |
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Application publication date: 20100526 |