CN103691925A - Integral slight-decarbonizing ladle for production of low-carbon manganese-silicon alloy - Google Patents
Integral slight-decarbonizing ladle for production of low-carbon manganese-silicon alloy Download PDFInfo
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- CN103691925A CN103691925A CN201310739585.4A CN201310739585A CN103691925A CN 103691925 A CN103691925 A CN 103691925A CN 201310739585 A CN201310739585 A CN 201310739585A CN 103691925 A CN103691925 A CN 103691925A
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- ladle
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Abstract
The invention belongs to the technical field of ladles, and particularly relates to an integral slight-decarbonizing ladle for production of low-carbon manganese-silicon alloy. The integral slight-decarbonizing ladle comprises a ladle body, and is characterized by further comprising a wall, a stress sacrificial reactor and sacrificial reactors. The wall is arranged on the inner surface of the ladle body; the stress sacrificial reactor covers the wall at the bottom of the ladle body; the sacrificial reactors are arranged on the wall of the sides of the ladle body. The low-carbon manganese-silicon type ladle has the service life at least three times of that a building ladle, the effective external decarbonization efficiency is about 30%, and cost of ladle consumption of each ton of iron can be reduced effectively.
Description
Technical field
The invention belongs to ladle technical field, relate in particular to the one decarburization ladle that declines for a kind of low Carbon Manganese silicon alloy.
Background technology
At present, most domestic ferroalloy producer is used ladle to carry out the outer splendid attire molten iron of stove, and ladle liner generally all adopts and builds formula by laying bricks or stones, builds formula ladle equal short and poor defect of decarburization capacity of average life in ferroalloy production and application by laying bricks or stones.Through the effort of producer and domestic some Research Center, ladle aspect in service life etc. has obtained a little improvement, but still fail to meet large-scale mineral hot furnace high strength, smelts and the demand of high-quality ferroalloy productor to ladle.
Summary of the invention
For solving the deficiencies in the prior art, the invention provides the one decarburization ladle that declines for a kind of carbon manganese-silicon.This integral type molten iron bag impels ladle inclusion and inner lining refractory material bag wall to be effectively combined into integral body by improving inclusion texture, thereby has stopped the phenomenon that causes inner lining refractory material to come off because of rising-heat contracting-cold.By setting up, sacrifice reactor simultaneously, the resistance to material of local selecting type pours into a mould to improve the anti-erosion scouring capability in molten iron cinder inclusion iron region, by slag iron wash away and self high temperature with sacrifice reactor and carry out micro-decarburizing reaction
The one decarburization ladle that declines for a kind of low Carbon Manganese silicon alloy, comprise ladle inclusion, it is characterized in that: also comprise wall, stress sacrifice reactor and sacrifice reactor, described bag wall is arranged on the inner surface of described ladle inclusion, described stress sacrifice reactor covers on the bag wall of the inner surface bottom described ladle inclusion, and described sacrifice reactor is arranged on the bag wall of described ladle inclusion internal side wall.
Preferably, the each component of material and the weight percentage of each component of described formation bag wall are: high-temperature refractory 83～90%, high temperature micro-expanding agent 3～5%, bonding agent 5～14%.
Preferably, described high-temperature refractory comprises corundum castable, carbonitride of silicium, and the mass ratio of corundum castable and carbonitride of silicium is 1:2～1:3.
Preferably, the described stress sacrifice each component of reactor and the weight percentage of each component are: silica 70～80%, manganese monoxide 10～15%, bonding agent 10～15%.
Preferably, the each component of described sacrifice reactor and the weight percentage of each component are: manganese monoxide 70～80%, silica 1 0～15%, bonding agent 10～15%.
Preferably, described bonding agent is waterglass.
Low Carbon Manganese silicon kind ladle provided by the present invention can reach the 3 times of outer decarburization of above, effective stove 30% left and right of building formula ladle by laying bricks or stones service life, and can effectively reduce the use cost that ton iron consumes ladle.
Accompanying drawing explanation
Fig. 1 is the cutaway view of ladle provided by the present invention.
Fig. 2 is contrast experiment's carbon content comparison diagram.
The specific embodiment
Below principle of the present invention and feature are described, example, only for explaining the present invention, is not intended to limit scope of the present invention.
By reference to the accompanying drawings 1, in a concrete embodiment, the one decarburization ladle that declines for a kind of low Carbon Manganese silicon alloy, comprise ladle inclusion 1, bag wall 2, stress sacrifice reactor 3 and sacrifice reactor 4, described bag wall 2 is arranged on the inner surface of described ladle inclusion 1, described stress is sacrificed reactor 3 and is covered on the bag wall of described ladle inclusion 1 bottom, and described sacrifice reactor 4 is arranged on the bag wall of described ladle inclusion sidewall.
Preferably, as shown in Figure 1, described sacrifice reactor 4 is arranged on the residing height in slag iron region, and the area covering can make the slag iron in slag iron region not contact described bag wall 2.
The each component of described bag wall 2 and the weight percentage of each component are: corundum castable 27%, charcoal silicon nitride 54%, high temperature micro-expanding agent 4%, waterglass 15%.
Described stress is sacrificed the each component of reactor 3 and the weight percentage of each component is: manganese monoxide 10%, silica 80%, waterglass 10%.
The each component of described sacrifice reactor 4 and the weight percentage of each component are: manganese monoxide 80%, silica 1 0%, waterglass 10%.
The each component of described bag wall 2 and the weight percentage of each component are: corundum castable 25%, charcoal silicon nitride 60%, high temperature micro-expanding agent 5%, waterglass 10%.
Described stress is sacrificed the each component of reactor 3 and the weight percentage of each component is: manganese monoxide 15%, silica 75%, waterglass 10%.
The each component of described sacrifice reactor 4 and the weight percentage of each component are: manganese monoxide 80%, silica 1 0%, waterglass 10%.
The each component of described bag wall 2 and the weight percentage of each component are: corundum castable 20%, charcoal silicon nitride 65%, high temperature micro-expanding agent 3%, waterglass 12%.
Described stress is sacrificed the each component of reactor 3 and the weight percentage of each component is: manganese monoxide 10%, silica 80%, waterglass 10%.
The each component of described sacrifice reactor 4 and the weight percentage of each component are: manganese monoxide 72%, silica 1 3%, waterglass 15%.
The each component of described bag wall 2 and the weight percentage of each component are: corundum castable 22%, charcoal silicon nitride 60%, high temperature micro-expanding agent 4%, waterglass 14%.
Described stress is sacrificed the each component of reactor 3 and the weight percentage of each component is: manganese monoxide 12%, silica 76%, waterglass 12%.
The each component of described sacrifice reactor 4 and the weight percentage of each component are: manganese monoxide 72%, silica 1 3%, waterglass 15%.
Principle explanation
The formula of building by laying bricks or stones the ladle of using by the 4 * 16500kVA of Dui Mou factory workshop is carried out relevant data statistics and theory analysis, contrasts my the integral type molten iron bag of company's research and development and contrast under equal service condition.This workshop has 4 16500kVA mineral hot furnaces, produces sometime the low Carbon Manganese silicon alloy of the same trade mark in section simultaneously.Every stove iron melting unit interval of this workshop is 3 hours, the time 10-12 minute/stove that taps a blast furnace, approximately 10 tons/stove of output, slag iron are 0.6 than 1:1.2, basicity of slag.By producing table order, can be divided into 1#, 2#, 3#, 4# stove.This workshop is carried out Fourth Shift's three fortune production system processed, therefore every stove per tour is furnished with a ladle, this workshop is furnished with 2 standby bags simultaneously, branch is successively in order: 1#-1,1#-2---4#-3,4#-4 and standby-1, standby-2. in process of production formula ladle is all built by laying bricks or stones in this workshop and integral type molten iron bag carries out service life and damage reason is followed the tracks of and data statistics.In Table 1
Table 1
Affect reason in service life
By the formula of building by laying bricks or stones the ladle to above-mentioned use, carry out whole process and use tracking, find its local shedding reason be because the mud that refractory brick and laying fireproof bricks seam are filled because the temperature difference is understood loose or dislocation after expanding with heat and contract with cold, the part that comes off substantially without adhesive ability, causes ladle liner overall structure performance impaired direct ladle service life of affecting with ladle wall contact portion smooth surface.
Ferroalloy production process is successional production, in the process of tapping a blast furnace, slag iron is arranged in ladle simultaneously, slag iron carries out circumference simultaneously and spins upside down shuttling movement in ladle, thereby causes molten iron cinder inclusion iron region to corrode and seriously cause ladle to be restricted service life than other regions because slag iron high temperature moves to wash away.
Directly to affect the ladle inevitable factor in service life for above-mentioned reasons, through for a long time tackling key problem test, can be by improving ladle inclusion texture, select suitable resistance to material and set up to sacrifice reactor and improve ladle service life.
Low Carbon Manganese silicon alloy charcoal Cause Analysis on Excess
Manganese-silicon is because the difference of the trade mark differs to the standard that requires of carbon content, to carbon content, requiring the strictest is low Carbon Manganese silicon alloy, the production principle of low Carbon Manganese silicon alloy and common manganese-silicon basically identical, but need allocate enough reducing agents into, owing to being subject to the restriction of reducing agent physical and chemical index, in actual production process, reducing agent needs excessive allocating into, reducing agent excessive allocate into cause reducing agent remains be mingled with slag iron among, thereby carbon segregation in ladle is not in place while causing slag iron separated, cannot cause low Carbon Manganese silicon alloy carbon to exceed standard by carbon is effectively separated.Another reason for Exceeding, for adopting the de-slag chalybeate of carbonaceous to spray the ladle liner of resistance to material in ladle use procedure, causes the de-slag chalybeate of carbonaceous partly to be sneaked among slag iron.
Sacrifice reactor decarburization principle
Bag wall is sacrificed reactor employing manganese, Si oxide mix and match and is equipped with a certain proportion of bonding agent cast and forms, slag iron (1550 ℃ of slag iron tapping temperatures) directly washes away reactor after discharging, because reactor is subject to larger washing away stress and the following reaction of slag iron high temperature boosting is carried out fast to the right:
MnO+SiO2=MnSiO3
2MnO+SiO2=Mn2SiO4
MnO·SiO2+3C=MnSi+3CO
Open=1569k of T
Boosting charcoal segregation decarburization principle
From CaO-SiO
2-Al
2o
3in ternary system phasor, analyze and learn: the slag constituent of low Carbon Manganese silicon alloy is: CaOSiO
2, 2CaOAl
2o
3siO
2, CaOAl
2o
32SiO
2, from above-mentioned analysis, learn that low Carbon Manganese silicon alloy slag viscosity coefficient is higher and far away higher than the viscosity coefficient of molten iron and carbon, thus carbon in ladle in motion process the more difficult slag iron boundary line of crossing cause low Carbon Manganese silicon alloy carbon to exceed standard.
Operation principle
In practical operation, at the bottom of slag iron directly washes away and clashes into Bao Bihou and fall into ladle bag from tapping hole is discharged, because molten iron stream is subject to instead at the bottom of ladle bag to repeat to spin upside down motion after pushing away stress in ladle, but because at the bottom of ladle bag, the lower molten iron stream that makes of excessive and stress plane is subject to the anti-stress dispersion that pushes away at the bottom of ladle to cause molten iron stream to spin upside down in ladle that motion amplitude is lower cannot reach slag iron critical edges with molten iron stream contact stress face, thereby carbon is more difficult to be subject to ladle bag bottom stress to carry out carbon motion to slag region by molten iron stream to be isolated in slag iron critical line below.
As shown in Figure 1, low Carbon Manganese silicon alloy provided by the invention declines decarburization ladle owing to having increased stress sacrifice reactor 3 by one, molten iron stream be subject at the bottom of ladle bag counter push away stress contact-making surface dwindle concentrate and stress contact-making surface position on move, molten iron stream be subject at the bottom of ladle bag the anti-concentrated dispersion that has reduced molten iron stream that pushes away stress in addition counter push away stress contact-making surface must on while moving molten iron stream expand and spin upside down the region of doing exercises targetedly, reached the standard grade in its moving region and break through slag iron critical zone, after impelling carbon only to be wrapped up by the larger slag of viscosity coefficient, carry out the effect that the separation of slag iron reaches decarburization.
Comparative example
The outer decarburization effect of stove for reality examination integral type molten iron bag, at the above-mentioned 4*16500kva workshop of mentioning, carried out integral type molten iron bag and built formula ladle by laying bricks or stones and carried out actual production decarburization contrast, comparison process is as follows: each stove uses respectively integral type molten iron bag and pouring type ladle to carry out the splendid attire of molten iron simultaneously.Reduced time (-11 days on the 10th certain month of certain year), contrast altogether 4, every stove contrast heat 10 stoves of table.
Above
The one that 1# stove the uses decarburization ladle that declines has the structure of the ladle shown in accompanying drawing 1, wherein wrap wall material, stress sacrifice pile materials for, to sacrifice pile materials be that embodiment 1 is listed.
The one that 2# stove the uses decarburization ladle that declines has the structure of the ladle shown in accompanying drawing 1, wherein wrap wall material, stress sacrifice pile materials for, to sacrifice pile materials be that embodiment 2 is listed.
The one that 3# stove the uses decarburization ladle that declines has the structure of the ladle shown in accompanying drawing 1, wherein wrap wall material, stress sacrifice pile materials for, to sacrifice pile materials be that embodiment 3 is listed.
The one that 4# stove the uses decarburization ladle that declines has the structure of the ladle shown in accompanying drawing 1, wherein wrap wall material, stress sacrifice pile materials for, to sacrifice pile materials be that embodiment 4 is listed.
Above contrast experiment's carbon content comparison diagram is shown in accompanying drawing 2.
With reference to the accompanying drawings 2 and related data comparative analysis can draw, integral type molten iron bag can effectively carry out the outer decarburization of stove, decarburization successful, according to reaching 30% left and right than the effective decarburization of common ladle.
Cost contrast
The resistance to material of ladle and use cost contrast statistical form
Ton iron ladle comprehensive consumption expense statistics
The comparative analysis of integral type molten iron Bao Dancong cost sees, although material relevant cost a little more than building formula ladle by laying bricks or stones, integral type molten iron bag has significantly reduced and when labour intensity reduces labour cost, has also reduced potential safety hazard.The increasing substantially of the service life of integral type molten iron bag reduced the use cost that ton iron consumes ladle simultaneously, and a ton iron production cost saves more than 200 yuan/ton.
The foregoing is only better embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. the one decarburization ladle that declines for a low Carbon Manganese silicon alloy, comprise ladle inclusion, it is characterized in that: also comprise wall, stress sacrifice reactor and sacrifice reactor, described bag wall is arranged on the inner surface of described ladle inclusion, described stress sacrifice reactor covers on the bag wall of the inner surface bottom described ladle inclusion, and described sacrifice reactor is arranged on the bag wall of described ladle inclusion internal side wall.
2. the one decarburization ladle that declines for low Carbon Manganese silicon alloy according to claim 1, the each component of material and the weight percentage of each component of described formation bag wall are: high-temperature refractory 83～90%, high temperature micro-expanding agent 3～5%, bonding agent 5～14%.
3. the one decarburization ladle that declines for low Carbon Manganese silicon alloy according to claim 2, is characterized in that: described high-temperature refractory comprises corundum castable, carbonitride of silicium, and the mass ratio of corundum castable and carbonitride of silicium is 1:2～1:3.
4. the one decarburization ladle that declines for low Carbon Manganese silicon alloy according to claim 1, described stress is sacrificed the each component of reactor and the weight percentage of each component is: silica 70～80%, manganese monoxide 10～15%, bonding agent 10～15%.
5. the one decarburization ladle that declines for low Carbon Manganese silicon alloy according to claim 1, the each component of described sacrifice reactor and the weight percentage of each component are: manganese monoxide 70～80%, silica 1 0～15%, bonding agent 10～15%.
6. according to the one decarburization ladle that declines for the arbitrary described low Carbon Manganese silicon alloy of claim 2 to 5, it is characterized in that: described bonding agent is waterglass.
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|---|---|---|---|
| CN201310739585.4A CN103691925B (en) | 2013-12-27 | 2013-12-27 | A kind of low Carbon Manganese silicon alloy decarburization ladle that integrally declines |
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| CN201310739585.4A CN103691925B (en) | 2013-12-27 | 2013-12-27 | A kind of low Carbon Manganese silicon alloy decarburization ladle that integrally declines |
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Inventor after: Zhong Yaoqiu Inventor after: Huang Zucheng Inventor after: Zeng Shilin Inventor after: Zhao Hongyang Inventor before: Huang Zucheng Inventor before: Zeng Shilin Inventor before: Chen Zhongjian Inventor before: Zhao Hongyang |
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