CN102094099A - Ferronickel refining system - Google Patents
Ferronickel refining system Download PDFInfo
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- CN102094099A CN102094099A CN2011100092688A CN201110009268A CN102094099A CN 102094099 A CN102094099 A CN 102094099A CN 2011100092688 A CN2011100092688 A CN 2011100092688A CN 201110009268 A CN201110009268 A CN 201110009268A CN 102094099 A CN102094099 A CN 102094099A
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Abstract
The invention discloses a ferronickel refining system which comprises a ferronickel tank, a melt feeding device, a ferronickel tank moving device, an impurity removal reagent adding device, a top oxygen blower, a bottom gas blower, a temperature detector, a sampling device and a slag removing device, wherein the top of the ferronickel tank is provided with an opening, and the bottom is provided with a gas injection port; the melt feeding device is connected with the opening of the ferronickel tank; the ferronickel tank is arranged on the ferronickel tank moving device; the impurity removal reagent adding device is connected with the opening of the ferronickel tank and used for adding an impurity removal reagent into the ferronickel tank; the top oxygen blower comprises an oxygen tank and an oxygen lance connected with the lower part of the oxygen tank, and the oxygen lance is inserted from the opening to the inside of the ferronickel tank; and the bottom gas blower is connected with the gas injection port, so that a gas is injected into the ferronickel tank from the bottom. According to the ferronickel refining system disclosed by the invention, devulcanization and dephosphorization can be implemented in one reaction vessel on the premise of satisfying the strict requirement of stainless steel production for the impurity content in the ferronickel; and the ferronickel refining system disclosed by the invention has the advantages of low energy consumption and simple structure.
Description
Technical field
The present invention relates to metallurgical technology field, especially relate to a kind of nickel iron refining system.
Background technology
As everyone knows, nickel is alloying element important in the metallurgy industry, because the nickel metal has particular performances, all have very widely and use producing stainless steel, Special Alloy Steel and be applied to various fields such as nickel plating, ceramic, cell catalyst, nickel alloy material all occupies crucial status in the development of the national economy and national defense and military construction.
Along with the widespread use of global stainless steel and special steel, cause the main element-nickel metal short supply of metallurgical stainless steel and special steel, cause that price skyrockets.At present, the nickel product is from sulphide ores more than 60% in the world, and all being present in the red soil nickel ore more than 60% of world's nickel resources.Handle the ferronickel that red soil nickel ore obtains with blast furnace or electric furnace reduction melting, be used to produce stainless steel through the substitute that both can be used as electrolytic nickel after the refining.
Smelt in the ferronickel that red soil nickel ore obtains at blast furnace or electric furnace reduction, contain impurity such as sulphur, phosphorus, carbon, silicon.The nickel iron refining processing method that at present domestic and international large-scale nickel-iron smelting factory adopts generally all is to change dephosphorization in the converter in electric furnace after the desulfurization over to, so the direct yield of complex procedures, energy consumption height and ferronickel is low.And the removal of various impurity needs proceed step by step.
Summary of the invention
Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency, a kind of nickel iron refining system is particularly proposed, the character that can effectively utilize josephinite self removes high-load sulphur when reducing electric energy loss, and can realize desulfurization and dephosphorization under to the situation of the strict demand of ferronickel phosphorus content in a reaction vessel satisfying stainless steel production.
In order to achieve the above object, one aspect of the present invention has proposed a kind of nickel iron refining system, comprising: ferronickel jar, described ferronickel tank top are provided with opening and the bottom is provided with bottom gas entrance; Melt feeding device, described melt feeding device link to each other with the opening of described ferronickel jar and are used for the thick ferronickel melt of fused is added described ferronickel jar; Ferronickel jar running gear is provided with described ferronickel jar to move and the described ferronickel jar that tilts on described running gear; Cleaner adding set, described cleaner adding set link to each other with the opening of described ferronickel jar and are used for adding cleaner in the ferronickel jar; The top oxygen blowing device, described top oxygen blowing device comprises oxygen lance and oxygen canister, described oxygen lance is used for spraying oxygen in the melt of described ferronickel jar in described opening is inserted into described ferronickel jar; The bottom blowing device, described bottom blowing device links to each other to spray into gas from the bottom in described ferronickel jar with described bottom gas entrance; The melt temperature that temperature-detecting device, described temperature-detecting device are used to detect in the ferronickel jar carries out skimming after the desulfurization or continuing desulfurization operations with detection; Sampling unit, thus the melt sample that is used to gather in the ferronickel jar carries out dephosphorization or intensification desulfurization operations to measure molten intravital foreign matter content detection; And the device of skimming, be used for after desulfurization He behind the dephosphorization, removing the slag above the melt in the ferronickel jar.
Nickel iron refining according to the above embodiment of the present invention system, the character that can effectively utilize josephinite self removes high-load sulphur when reducing electric energy loss, and can realize desulfurization and dephosphorization under to the situation of the strict demand of ferronickel foreign matter content in a reaction vessel satisfying stainless steel production.In addition, this nickel iron refining system and existing system simplified in comparison equipment, reduced investment, also capable of reducing energy consumption simultaneously.And this nickel iron refining system is very flexible, can take corresponding removal of impurities measure according to the difference of thick ferronickel composition.In addition, the removal of impurities of the high sulfur coarse nickel iron of electric furnace output directly can being jetted in the ferronickel jar of this nickel iron refining system reduces the process of tank switching, shortens the operating time, reduces thermal losses.
In addition, the nickel iron refining system according to the embodiment of the invention can also have following additional technical feature:
According to one embodiment of present invention, described nickel iron refining system also comprises: splash guard; And the splash guard lifting device, described splash guard lifting device is connected with described splash guard so that splash guard is mobile between the second position of the first location of the opening that covers the ferronickel jar and the opening that leaves the ferronickel jar.
According to one embodiment of present invention, described nickel iron refining system also comprises the solid oxidizing agent adding set, and described solid oxidizing agent adding set links to each other in order to add solid oxidizing agent in the ferronickel jar with described opening.
According to one embodiment of present invention, described solid oxidizing agent adding set is a vibration material feeding.
According to one embodiment of present invention, described nickel iron refining system also comprises the aluminium powder adding set, and described aluminium powder adding set links to each other with described opening to be lower than with the melt temperature in the ferronickel jar and adds aluminium powder when preset temperature and molten intravital sulphur content are higher than preset value in the ferronickel jar.
According to one embodiment of present invention, described nickel iron refining system also comprises the dust gathering arrester that is arranged on described splash guard top.
According to one embodiment of present invention, described cleaner adding set comprises the cleaner hopper, be connected the cleaner winding-up jar of described cleaner hopper lower end and be connected the cleaner spray gun of described cleaner winding-up jar lower end, and described cleaner spray gun is used for cleaner is sprayed into melt in the ferronickel jar in described opening is inserted into described ferronickel jar melt.
According to one embodiment of present invention, be provided with the screen cloth that the fineness of described cleaner is controlled in the described cleaner hopper.
According to one embodiment of present invention, described cleaner adding set also comprises fluidizator, and described fluidizator is arranged between described cleaner hopper and the described cleaner winding-up jar so that described cleaner fluidization.
According to one embodiment of present invention, described nickel iron refining system also comprises the waste residue recycling and processing device, and described waste residue recycling and processing device and the adjacent setting of described ferronickel jar are so that reclaim and handle by the described slag that device removed of skimming.
According to one embodiment of present invention, described temperature measuring apparatus and described sampling unit are integrated into one.
Additional aspect of the present invention and advantage part in the following description provide, and part will become obviously from the following description, perhaps recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is a nickel iron refining system architecture synoptic diagram according to an embodiment of the invention;
Schematic flow sheet when Fig. 2 carries out nickel iron refining for the nickel iron refining system that uses Fig. 1.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
Disclosing hereinafter provides many different embodiment or example to be used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter parts and the setting to specific examples is described.Certainly, they only are example, and purpose does not lie in restriction the present invention.
Describe nickel iron refining system of the present invention and utilize this nickel iron refining system to carry out the technological process of refining ferronickel below with reference to Fig. 1 and Fig. 2, Fig. 1 shows nickel iron refining system schematic according to an embodiment of the invention, and Fig. 2 shows and uses Fig. 1 nickel iron refining system to carry out the purified schematic flow sheet.
I) nickel iron refining system
As shown in Figure 1, the nickel iron refining system according to the embodiment of the invention comprises ferronickel jar 1, melt feeding device (not shown), ferronickel jar running gear 2, cleaner adding set 9, top oxygen blowing device 7, bottom blowing device 12, temperature-detecting device, sampling unit and the device 11 of skimming.
Particularly, described ferronickel jar 1 top is provided with opening and the bottom is provided with bottom gas entrance (not shown).
Described melt feeding device links to each other with the opening of described ferronickel jar 1 and is used for the thick ferronickel melt of fused is added described ferronickel jar 1.
Described ferronickel jar 1 is set to move and the described ferronickel jar 1 that tilts on described ferronickel jar running gear 2.
Cleaner adding set 9 links to each other with the opening of described ferronickel jar 1 and be used for adding cleaner in ferronickel jar 1.
Top oxygen blowing device 7 comprises oxygen canister 7a and is connected the oxygen lance 7b of oxygen canister 7a below, and described oxygen lance 7b is inserted into from the described opening of ferronickel jar 1 and is used in the ferronickel jar 1 spraying oxygen in the melt of ferronickel jar 1.
Bottom blowing device 12 links to each other to spray into gas from the bottom in described ferronickel jar 1 with the described bottom gas entrance of ferronickel jar 1.
The melt temperature that temperature-detecting device is used to detect in the ferronickel jar 1 carries out skimming after the desulfurization or continuing desulfurization operations with detection.
Thereby the melt sample that sampling unit is used to gather in the ferronickel jar carries out dephosphorization or intensification desulfurization operations to measure molten intravital foreign matter content detection.
The device 11 of skimming is used for removing the slag above the melt in the ferronickel jar 1 after desulfurization He behind the dephosphorization.
Thus, the character that can effectively utilize josephinite self removes high-load sulphur when reducing electric energy loss, and can realize desulfurization and dephosphorization under to the situation of the strict demand of ferronickel foreign matter content in a reaction vessel satisfying stainless steel production.In addition, this nickel iron refining system and existing system simplified in comparison equipment, reduced investment, also capable of reducing energy consumption simultaneously.And this nickel iron refining system is very flexible, can take corresponding removal of impurities measure according to the difference of thick ferronickel composition.In addition, the removal of impurities of the high sulfur coarse nickel iron of electric furnace output directly can being jetted in the ferronickel jar of this nickel iron refining system reduces the process of tank switching, shortens the operating time, reduces thermal losses.
In addition, spill in the removal of impurities process in order to prevent melt, described nickel iron refining system can also comprise splash guard 3; And splash guard lifting device 31.Described splash guard lifting device 31 is connected with described splash guard 3 so that splash guard 3 is mobile between the second position of the first location of the opening that covers ferronickel jar 1 and the opening that leaves the ferronickel jar.
In the nickel iron refining system of some of them embodiment of the present invention, described nickel iron refining system can also comprise solid oxidizing agent adding set 8, and described solid oxidizing agent adding set 8 links to each other with described opening in order to add solid oxidizing agent in ferronickel jar 1.In a concrete example, described solid oxidizing agent adding set 8 is a vibration material feeding.Thus, can pass through solid oxidizing agent according to the composition of josephinite, for example iron protoxide is realized the dephosphorization of ferronickel melt etc.Need to prove that solid oxidizing agent also can mix with cleaner and add by cleaner adding set 9, and solid oxidizing agent adding set 8 and cleaner adding set 9 are provided with just a preferred embodiment of the present invention respectively.Because cleaner itself also has the slag making effect except being suitable for desulfurization, can at first carry out at the impurity content of ferronickel melt utilizing identical cleaner to carry out slag making again in dephosphorization after desulfurization, the desiliconization and solid oxidizing agent adding set 8 and cleaner adding set 9 be provided with respectively, so setting then need not the cleaner in the cleaner winding-up jar is changed and used same equipment can realize the impurity removing refining of the ferronickel melt of the different impurity contents of different batches neatly.
In the nickel iron refining system of some of them embodiment of the present invention, described nickel iron refining system can also comprise aluminium powder adding set 14, the aluminium powder adding set 14 interpolation aluminium powder to ferronickel jar 1 in that links to each other with described opening when being lower than preset temperature and molten intravital sulphur content and being higher than preset value with the melt temperature in the ferronickel jar.In a concrete example, aluminium powder adding set 14 is a vibration material feeding.Thus, can make itself and oxygen generation oxidizing reaction by adding aluminium powder when needed according to melt temperature, thereby owing to this oxidizing reaction is that temperature reaction need not the temperature that heating installation can improve melt.
In the nickel iron refining system of some of them embodiment of the present invention, in order to prevent to cause that powder disperses when adding aluminum oxide or iron protoxide powder etc., described nickel iron refining system can also comprise the dust gathering arrester 4 that is arranged on described splash guard 3 tops.
In the nickel iron refining system of some of them embodiment of the present invention, cleaner adding set 9 comprises cleaner hopper 9a, be connected the cleaner winding-up jar 9b of cleaner hopper 9a lower end and be connected the cleaner spray gun 9c of cleaner winding-up jar 9b lower end.Cleaner spray gun 9c is used for cleaner is sprayed into melt in the ferronickel jar in described opening is inserted into described ferronickel jar melt.Thus, by being that carrier joins cleaner in the ferronickel melt, increased the dispersiveness of cleaner in the ferronickel melt, thereby can when improving dust removal rate, improve impurity-eliminating effect with dried compressed air or nitrogen.Sealed valve, control wearable valve can be set to control the winding-up of cleaner before and after the cleaner winding-up jar 9b.
In the nickel iron refining system of some of them embodiment of the present invention, be provided with the screen cloth that the fineness of described cleaner is controlled in the cleaner hopper 9a, such as 200 orders (being that particle diameter is less than 75 μ m) or thinner screen cloth.Thus, help the dispersion of cleaner in melt, can improve speed of response simultaneously.
In the nickel iron refining system of some of them embodiment of the present invention, the cleaner adding set also comprises fluidizator (not shown), and described fluidizator is arranged between cleaner hopper 9a and the cleaner winding-up jar 9b so that described cleaner fluidization.Thus, make described cleaner be more convenient for carrying.
In addition, described nickel iron refining system can also comprise waste residue recycling and processing device 13, described waste residue recycling and processing device 13 with described ferronickel jar 1 adjacent setting so that reclaim and handle the slag that is removed by the described device 11 of skimming.Thus, by the slag that removed of recycling, thus various compositions to containing in the slag as required, for example Ca, Al, S, P, Si etc. utilize again.
Preferably, temperature-detecting device and sampling unit are integrated into one and become thermometric sampling unit 10.Can make the simpler compactness of nickel iron refining system like this, operability is stronger.
II) nickel iron refining technology
Below, 2 the technology that the nickel iron refining system that uses Fig. 1 carries out nickel iron refining is described with reference to the accompanying drawings.
Owing to be in reducing atmosphere from the thick ferronickel melt of electrosmelting gained, handle so at first this melt is carried out desulfurization.In processing such as the further dephosphorization of the laggard row of desulfurization, decarburizations.
Step 1: at first, it is the melt of the high sulfur coarse nickel iron more than 1450 ℃ that initial temperature is provided.Particularly, can use the melt of the thick ferronickel of Combustion in High Temperature High Sulfur that electrosmelting obtains, with the initial temperature of electrosmelting gained is that thick ferronickel melt is poured in the ferronickel jar 1 by melt feeding device (not shown) more than 1450 ℃, and after this ferronickel jar 1 that thick ferronickel melt will be housed by ferronickel jar running gear 2 moves to the refining station.Can directly carry out refining thus, thereby save link such as heat the pyritous high sulfur coarse nickel iron, can energy efficient.
Step 2: after this, above ferronickel jar 1, install splash guard 3 and dust gathering arrester 4 successively additional.After this cleaner spray gun 9b with cleaner adding set 9 is inserted into predetermined depth in the melt, with pressurized gas or nitrogen be carrier in melt, add contain quickened lime, Wingdale, fluorite composite desulfurizing agent to carry out desulfurization.Feeding high pressure gas by bottom blowing device 12 in ferronickel jar 1 simultaneously stirs.Particularly, described high pressure gas can be nitrogen or such as rare gas elementes such as argon gas.Because native system is provided with bottom blowing device 12, can overcome therefore that traditional electric furnace can't stir and problem such as speed of response is slow, reaction efficiency is low.
Step 3: the sulphur content by 10 pairs of described melts of thermometric sampling unit detects termly in desulfurization, when sulphur content is that preset value stops refining when following, when sulphur content is higher than preset value then according to melt temperature different continues stirring desulphurization or skim, heat up back continuation stirring desulphurization until sulphur content be preset value when following till, obtain Rhometal melt after the refining thus.
Particularly, when temperature is (for example 1350 ℃ of preset temperatures, preferred 1400 ℃) stop refining when following and skim, and after skimming, in melt, add aluminium powder by aluminium powder adding set 14, and pass through oxygen lance 7 and in melt, jet oxygen so that melt heats up, after this proceed stirring, desulfurization.Described skimming removed splash guard 3 by splash guard lifting gear 31 particularly, the angle of utilizing ferronickel jar running gear 2 to make ferronickel jar 1 tilt to be scheduled to, and skim by the device 11 of skimming, the slag that removes recycles by waste residue recycling and processing device 13.When being higher than preset temperature (for example 1350 ℃, preferred 1400 ℃), temperature continues stirring, desulfurization.
Step 4: after this, after described desulfurization, add compound dephosphorization agent in the Rhometal melt, be blown into oxygen simultaneously from the top and feed high pressure gas and stir, obtain refining Rhometal liquid with dephosphorization by the bottom.Because native system is provided with bottom blowing device 12, can overcome therefore that traditional electric furnace can't stir and problem such as speed of response is slow, reaction efficiency is low.
Particularly, described compound dephosphorization agent comprises slag former and solid oxidizing agent.At slag former described in the concrete example can be the carrier adding of jetting in melt with pressurized gas or nitrogen.Described solid oxidizing agent is iron protoxide (FeO) or other oxides-containing irons, can add with mode of vibration by the solid oxidizing agent adding set.The described high pressure gas that fed by the bottom can be compressed nitrogens or such as rare gas elementes such as argon gas.
According to a preferred embodiment of the present invention, wherein, contain the CaO of 82wt%～92wt%, the CaF of 2wt%～10wt% in the described slag former
2And the CaCO of 3wt%～7wt%
3Particularly, the usage quantity of slag former and solid oxidizing agent can situation is different to be changed according to mixing containing of ferronickel, by progressively adding till the impurity content of melt meets product requirement.
Step 5: after dephosphorisation reaction finishes, skim, cast, obtain refining Rhometal after the cooling and demolding.
Therefore the refinery practice of thick ferronickel according to the above embodiment of the present invention owing to composite desulfurizing agent progressively adds in batches, thereby can not take place to cause the melt temperature rapid drawdown to cause the problem of the slow of desulphurization reaction or stagnation owing to a large amount of addings of sweetening agent.
Next reaction process related in this technology and principle are described.
1) desulfurization
Owing to be in reducing atmosphere from the thick ferronickel melt of electrosmelting gained, at first this melt carried out desulfurization and handle.
According to a preferred embodiment of the present invention, contain the CaO of 82wt%～92wt%, the CaF of 2wt%～10wt% in the described composite desulfurizing agent
2And the CaCO of 3wt%～7wt%
3
In above-mentioned refining process, in sweetening process, relate to following reaction:
2S+2CaO＝2CaS+O
2 (1)
Si+O
2＝SiO
2 (2)
CaO+SiO
2＝CaSiO
3 (3)
Because the CaS that reaction (1) is generated will directly enter in the slag.And by reaction formula (2) as can be known, be under the situation of composite desulfurizing agent of main component with CaO adding of the present invention, in desulfurization, can also remove silicon.
Because the SiO that the impurity Si that is contained in CaO and the thick ferronickel forms through oxidation
2Generate CaSiO by above-mentioned reaction formula (3) reaction
3, and the CaSiO that is generated
3For film like and be wrapped in the surface of CaO, therefore influenced further desulfurization.Given this, by in composite desulfurizing agent, containing certain low-melting CaF
2, can destroy CaSiO
3Film.And on the other hand, add a certain amount of CaCO
3Then can improve the flowability of melt by following reaction (4), improve sweetening effectiveness.
CaCO
3＝CaO+CO
2 (4)
And, can also contain Al and/or carbon dust in the composite desulfurizing agent according to a preferred embodiment of the present invention.In the case, following reaction will take place:
2Al+3O
2＝Al
2O
3 (5)
2C+O
2＝2CO (6)
2CO+O
2＝2CO
2 (7)
Reaction (5), (7) can increase the flowability of melt on the one hand, thereby can compensate the caused calorific loss because cold burden is jetted because above-mentioned reaction is thermopositive reaction on the one hand.
Except above-mentioned reaction, also carry out following reaction in the melt:
2[P]+5[O]＝(P
2O
5) (8)
(P
2O
5)+4CaO＝4CaO·P
2O
5 (9)
Therefore, in desulfurization, its phosphorus content also decreases.
According to a preferred embodiment of the present invention, the granularity of described composite desulfurizing agent is controlled at below the 75 μ m by 200 eye mesh screens that are arranged in the hopper.Be controlled at below the 75 μ m by granularity, can promote desulphurization reaction to carry out fast composite desulfurizing agent.
In sweetening process, because therefore cold burden winding-up and the bottom aeration-agitation heat radiation in the winding-up process can cause the loss of heat.Above-mentioned reaction (2) is thermopositive reaction, can compensate the cold burden caused calorific loss of jetting when siliceous.And when in the ferronickel when not siliceous, need to solve the temperature drop problem by other intensification means.Drop to preset value (for example 1350 ℃, preferred 1400 ℃) when following in temperature, need stop desulfurization and further heat up in the back of skimming, guarantee carrying out smoothly of sulfur removal technology when improving desulphurization reaction speed and reaction efficiency.According to a preferred embodiment of the present invention, can aerating oxygen or aluminium powder make its oxidizing reaction that for example above-mentioned (2), (5), (7) take place to realize described intensification.
Through behind the aforesaid sulfur removal technology, can make the sulphur content of melt reach product requirement.
2) dephosphorization
The particular case of the phosphorus content that is contained according to the thick ferronickel of raw material behind desulfurizing and refining, has further also been carried out dephosphorization at the phosphorus impurities that is wherein contained.
Because some is removed by reaction formula (8), (9) its contained phosphorus in sweetening process, in ensuing dephosphorizing process, except lime, Wingdale, fluorite, also further add iron protoxide powder or block.Therefore, in dephosphorizing process, following reaction except taking place, takes place also in (8), (9) reaction:
2P+5FeO+4CaO＝4CaO·P
2O
5+5Fe (10)
Particularly, in an example of the present invention, contain impurity in the handled thick ferronickel sample and content (weight content) is as follows:
| S | Si | P | C | Cr |
| 0.5％ | 0.4％ | 0.1％ | 1.5％ | 0.2％ |
After desulfurization and dephosphorization refining, the foreign matter content (weight content) in the gained purified Rhometal is as follows:
| S | Si | P | C | Cr |
| 0.03％ | 0.02％ | 0.015％ | 0.03％ | 0.1％ |
Hence one can see that, according to the nickel iron refining system of the embodiment of the invention, the sulfur impurity in the ferronickel, phosphorus, carbon, silicon etc. can be reduced to and satisfy the desired level of refining ferronickel product.
In the description of this specification sheets, concrete feature, structure, material or characteristics that the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example description are contained at least one embodiment of the present invention or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete feature, structure, material or the characteristics of description can be with the suitable manner combination in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification that scope of the present invention is by claims and be equal to and limit to these embodiment.
Claims (11)
1. a nickel iron refining system is characterized in that, comprising:
Ferronickel jar, described ferronickel tank top are provided with opening and the bottom is provided with bottom gas entrance;
Melt feeding device, described melt feeding device link to each other with the opening of described ferronickel jar and are used for the thick ferronickel melt of fused is added described ferronickel jar;
Ferronickel jar running gear is provided with described ferronickel jar to move and the described ferronickel jar that tilts on described ferronickel jar running gear;
Cleaner adding set, described cleaner adding set link to each other with the opening of described ferronickel jar and are used for adding cleaner in the ferronickel jar;
Top oxygen blowing device, described top oxygen blowing device comprise oxygen canister and are connected the oxygen lance of oxygen canister below that described oxygen lance is used for spraying oxygen in the melt of described ferronickel jar in described opening is inserted into described ferronickel jar;
The bottom blowing device, described bottom blowing device links to each other to spray into gas from the bottom in described ferronickel jar with described bottom gas entrance;
Temperature-detecting device, described temperature-detecting device are used to detect the melt temperature in the ferronickel jar;
Sampling unit, the melt sample that is used to gather in the ferronickel jar melts intravital foreign matter content to measure; And the device of skimming, be used for after desulfurization He behind the dephosphorization, removing the slag above the melt in the ferronickel jar.
2. nickel iron refining as claimed in claim 1 system is characterized in that, described nickel iron refining system also comprises:
Splash guard; And the splash guard lifting device, described splash guard lifting device is connected with described splash guard so that splash guard is mobile between the second position of the first location of the opening that covers the ferronickel jar and the opening that leaves the ferronickel jar.
3. nickel iron refining as claimed in claim 2 system is characterized in that, described nickel iron refining system also comprises the solid oxidizing agent adding set, and described solid oxidizing agent adding set links to each other in order to add solid oxidizing agent in the ferronickel jar with described opening.
4. nickel iron refining as claimed in claim 3 system is characterized in that described solid oxidizing agent adding set is a vibration material feeding.
5. nickel iron refining as claimed in claim 2 system, it is characterized in that, described nickel iron refining system also comprises the aluminium powder adding set, and described aluminium powder adding set links to each other with described opening to be lower than with the melt temperature in the ferronickel jar and adds aluminium powder when preset temperature and molten intravital sulphur content are higher than preset value in the ferronickel jar.
6. as each described nickel iron refining system of claim 3 to 5, it is characterized in that described nickel iron refining system also comprises the dust gathering arrester that is arranged on described splash guard top.
7. nickel iron refining as claimed in claim 1 system, it is characterized in that, described cleaner adding set comprises the cleaner hopper, be connected the cleaner winding-up jar of described cleaner hopper lower end and be connected the cleaner spray gun of described cleaner winding-up jar lower end, and described cleaner spray gun is used for cleaner is sprayed into melt in the ferronickel jar in described opening is inserted into described ferronickel jar melt.
8. nickel iron refining as claimed in claim 7 system is characterized in that, is provided with the screen cloth that the fineness of described cleaner is controlled in the described cleaner hopper.
9. nickel iron refining as claimed in claim 7 system is characterized in that described cleaner adding set also comprises fluidizator, and described fluidizator is arranged between described cleaner hopper and the winding-up of described cleaner jar so that described cleaner fluidization.
10. nickel iron refining as claimed in claim 1 system, it is characterized in that, described nickel iron refining system also comprises the waste residue recycling and processing device, and described waste residue recycling and processing device and the adjacent setting of described ferronickel jar are so that reclaim and handle by the described slag that device removed of skimming.
11. nickel iron refining as claimed in claim 1 system is characterized in that described temperature measuring apparatus and described sampling unit become one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100092688A CN102094099B (en) | 2011-01-17 | 2011-01-17 | Ferronickel refining system |
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| JPS61295312A (en) * | 1985-06-24 | 1986-12-26 | Kawasaki Steel Corp | Pretreatment of molten pig iron |
| CN1130212A (en) * | 1995-05-05 | 1996-09-04 | 布禾 | Technology for dephospyhorizing and forced desulfurating in cupola |
| JP2006199981A (en) * | 2005-01-18 | 2006-08-03 | Hyuga Seirensho:Kk | Method for desulfurizing ferro-nickel |
| CN101545019A (en) * | 2009-05-07 | 2009-09-30 | 河北龙凤山铸业有限公司 | Method for smelting pig iron for high-silicon ultra-low-sulfur low-titanium ductile iron |
| CN101665847A (en) * | 2009-09-22 | 2010-03-10 | 吉林吉恩镍业股份有限公司 | Process for recovering iron by smelting reduction of electric furnace slag |
| CN202030814U (en) * | 2011-01-17 | 2011-11-09 | 中国恩菲工程技术有限公司 | Ferronickel refining system |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61295312A (en) * | 1985-06-24 | 1986-12-26 | Kawasaki Steel Corp | Pretreatment of molten pig iron |
| CN1130212A (en) * | 1995-05-05 | 1996-09-04 | 布禾 | Technology for dephospyhorizing and forced desulfurating in cupola |
| JP2006199981A (en) * | 2005-01-18 | 2006-08-03 | Hyuga Seirensho:Kk | Method for desulfurizing ferro-nickel |
| CN101545019A (en) * | 2009-05-07 | 2009-09-30 | 河北龙凤山铸业有限公司 | Method for smelting pig iron for high-silicon ultra-low-sulfur low-titanium ductile iron |
| CN101665847A (en) * | 2009-09-22 | 2010-03-10 | 吉林吉恩镍业股份有限公司 | Process for recovering iron by smelting reduction of electric furnace slag |
| CN202030814U (en) * | 2011-01-17 | 2011-11-09 | 中国恩菲工程技术有限公司 | Ferronickel refining system |
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