CN102061358A - Desulfuration refining process of high-sulfur crude ferronickel - Google Patents
Desulfuration refining process of high-sulfur crude ferronickel Download PDFInfo
- Publication number
- CN102061358A CN102061358A CN2011100093055A CN201110009305A CN102061358A CN 102061358 A CN102061358 A CN 102061358A CN 2011100093055 A CN2011100093055 A CN 2011100093055A CN 201110009305 A CN201110009305 A CN 201110009305A CN 102061358 A CN102061358 A CN 102061358A
- Authority
- CN
- China
- Prior art keywords
- melt
- nickel iron
- high sulfur
- refining
- ferronickel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a desulfuration refining process of high-sulfur crude ferronickel. The desulfuration refining process comprises the following steps of: (1) providing a fusant of the high-sulfur crude ferronickel with an initial temperature of more than 145 DEG C; (2) adding a composite desulfurizer to the fusant and introducing a high pressure gas from the bottom for stirring; (3) detecting sulfur content of the fusant, stopping desulfurating when the sulfur content of the fusant is below a predetermined value, detecting the temperature of the fusant when the sulfur content of the fusant is above the predetermined value, slagging off, raising the temperature of the fusant and repeating the step (2) until the sulfur content is below the predetermined value when the temperature is below 1350 DEG C, repeating the step (2) until the sulfur content is below the predetermined value when the temperature is above 1350 DEG C, and slagging off to obtain a refined ferronickel alloy fusant; and (4) casting and cooling the refined ferronickel alloy fusant and demoulding to obtain a refined ferronickel alloy. The desulfuration refining process of the high-sulfur crude ferronickel, which is disclosed by the embodiment of the invention, can be used for removing high-content sulfur with low energy consumption.
Description
Technical field
The present invention relates to the metallurgical production technical field, particularly a kind of desulfurizing and refining technology of high sulfur coarse nickel iron.
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.Generally in the nickel iron refining that at present domestic and international large-scale nickel-iron smelting factory adopts adopt electric furnace process (LF stove), paddling process (similar KR method) desulfurization.Generally speaking, carry out the technology that desulfurization is adopted for ferronickel, when sulphur content is not high, adopt the KR method more, when sulphur content is higher, then adopt electric furnace process more, this is owing to need to consume a large amount of heat in sweetening process by existing doctor treatment when sulphur content is higher, and electric furnace can replenish heat energy effectively.
Wherein the electric furnace process desulfurization has the stable and high advantage of desulfuration efficiency of processing performance, but needs to replenish the heat that loses in the sweetening process by electric energy fully, so energy consumption is higher.
Paddling process/KR method also has good desulfurization dynamic conditions, is adopted by several large-scale smelteries at present.But the desulfurization of KR method not only causes the first mate of temperature to reduce, and also needs follow-up desiliconization, dephosphorization equipment, so energy consumption is higher, technical process is longer.
Application number is the method that discloses a kind of high sulfur coarse nickel iron desulfurization in 200810058796.0 the patent application, adds in the fusion high sulfur coarse nickel iron in medium-frequency induction furnace by the sweetening agent soda ash of thick ferronickel quality 3-10% or/and CaO and by the flux CaF of thick ferronickel quality 0-2%
2, in temperature be under 1330-1630 ℃ the condition by induction stirring, sulphur in the thick ferronickel and soda ash or CaO are reacted and slag making, take off slagging-off after refining 5-20 minute.Yet this technology also belongs to electric furnace desulfurization scope, and needs tank switching, so energy consumption is bigger.
Summary of the invention
Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency, particularly proposes a kind ofly can remove the desulfurizing and refining technology that high-load sulphur can reduce the high sulfur coarse nickel iron of power consumption again.
In order to achieve the above object, one aspect of the present invention has proposed a kind of desulfurizing and refining technology of high sulfur coarse nickel iron, may further comprise the steps: 1) initial temperature is provided is the melt of the high sulfur coarse nickel iron more than 1450 ℃; 2) adding composite desulfurizing agent in the melt of described high sulfur coarse nickel iron stirs with desulfurization and by bottom feeding high pressure gas; 3) sulphur content of the described melt of detection, when the sulphur content of described melt is that preset value stops desulfurization when following, when being higher than preset value, the sulphur content of described melt detects the temperature of described melt, when temperature is to skim below 1350 ℃ the time and make the described melt back repeating step 2 that heats up) until sulphur content be preset value when following till, when temperature is a repeating step 2 more than 1350 ℃ the time) until sulphur content be preset value when following till, obtain Rhometal melt after the refining after skimming; And 4) Rhometal melt after the refining is cast and cooling and demolding, obtain refining Rhometal.
The desulfurizing and refining technology of high sulfur coarse nickel iron according to the above embodiment of the present invention can realize the desulfurizing and refining of high sulfur coarse nickel iron efficiently, and power consumption is little, technology simple, the adjusting process step to be to adapt to the refining of the thick ferronickel of different sulphur content simply.And can carry out desulfurizing and refining up to the thick ferronickel more than 0.58% to the ferronickel sulphur content, handle the back sulphur content and reach below 0.02%, satisfy stainless steel plant's standard.
In addition, the desulfurizing and refining technology of the high sulfur coarse nickel iron of the above embodiment of the present invention can also have following additional technical feature:
According to one embodiment of present invention, the melt of described high sulfur coarse nickel iron is the melt of the high sulfur coarse nickel iron that obtained by electrosmelting.Thus, can reduce the process of tank switching, shorten the operating time, reduce thermal losses.
According to one embodiment of present invention, the sulphur content of described high sulfur coarse nickel iron is more than the 0.25wt%.
According to one embodiment of present invention, contain the CaO (being also referred to as quickened lime in this manual sometimes) of 82wt%～92wt%, the CaF of 2wt%～10wt% in the described composite desulfurizing agent
2The CaCO of (being also referred to as fluorite in this manual sometimes) and 3wt%～7wt%
3(being also referred to as Wingdale in this manual sometimes).Lower, the convenient transportation of employed composite desulfurizing agent cost.
According to one embodiment of present invention, also contain the Al powder (being also referred to as aluminium powder in this manual sometimes) of 1～10wt% and/or the C powder (being also referred to as carbon dust in this manual sometimes) of 1～10wt% in the described slag former.
According to one embodiment of present invention, the particle diameter of described composite desulfurizing agent is below the 75 μ m.
According to one embodiment of present invention, described composite desulfurizing agent is carrier with the pressurized gas by the top winding-up mode adds.
According to one embodiment of present invention, described melt being heated up realizes by aerating oxygen in described melt and Al powder.Thus, can solve the temperature drop problem in the sweetening process, thereby after guaranteeing refining, need not to use electric furnace etc. that heat energy is compensated in the quality of product.
Additional aspect of the present invention and advantage part in the following description provide, and part will become obviously from the following description, or 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 the synoptic diagram of the employed nickel iron refining of the desulfurizing and refining technology system of high sulfur coarse nickel iron according to an embodiment of the invention;
Fig. 2 is the schematic flow sheet of the desulfurizing and refining technology of high sulfur coarse nickel iron according to an embodiment of the invention;
Fig. 3 is the schematic flow sheet of the desulfurizing and refining technology of high sulfur coarse nickel iron in accordance with another embodiment of the present invention;
Fig. 4 is the schematic flow sheet of the desulfurizing and refining technology of high sulfur coarse nickel iron in accordance with another embodiment of the present invention.
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.In addition, various specific technology and the examples of material that the invention provides, but those of ordinary skills can recognize the use of the applicability and/or the other materials of other technologies.
I) nickel iron refining system
The employed nickel iron refining of the desulfurizing and refining technology system of 1 pair of high sulfur coarse nickel iron of the present invention is described at first, with reference to the accompanying drawings.
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 iron protoxide in ferronickel jar 1.In a concrete example, described solid oxidizing agent adding set 8 is a vibration material feeding.Thus, can realize the dephosphorization etc. of ferronickel melt according to the composition of josephinite by solid oxidizing agent (for example iron protoxide is also referred to as FeO in this manual sometimes).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 some of them embodiment of the present invention in the employed nickel iron refining system, described nickel iron refining system can also comprise aluminium powder adding set 14, the described 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, described 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 some of them embodiment of the present invention in the employed nickel iron refining system, 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, with reference to figure 2～Fig. 4 the sulfur removal technology that the nickel iron refining system that uses Fig. 1 carries out nickel iron refining is described.
Embodiment 1
Below with reference to the desulfurizing and refining technology of Fig. 2 description according to the high sulfur coarse nickel iron of the embodiment of the invention 1.
Be in reducing atmosphere from the thick ferronickel melt of electrosmelting gained, be fit to carry out desulfurization and handle.Particularly, described sulfur removal technology step is as follows.
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, installing splash guard 3 and dust gathering arrester 4 successively additional above ferronickel jar 1, and the cleaner spray gun 9b of cleaner adding set 9 is inserted into predetermined depth in the melt, is that carrier adds in melt and contains CaO, CaCO with the pressurized gas
3, CaF
2Composite 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 compressed nitrogens 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 continues stirring desulphurization or skimming, heating up back continuation stirring desulphurization till sulphur content reaches product requirement, obtain Rhometal melt after the refining after skimming according to melt temperature is different.
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: Rhometal melt after the refining of step 3 gained is cast and cooled off demoulding, obtain refining Rhometal.
The sulfur removal technology of high sulfur coarse nickel iron according to the above embodiment of the present invention, because composite desulfurizing agent progressively adds in batches, thereby therefore 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.Thus, the desulfurizing and refining technology of the high sulfur coarse nickel iron of the embodiment of the invention can remove high-load sulphur with less energy-consumption.
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 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 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＝A1
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, wherein, the fineness of described composite desulfurizing agent is below 200 orders.By fineness being controlled at below 200 orders, can promote carrying out fast of desulphurization reaction.
In addition, the composite desulfurizing agent among the present invention can be carrier with the pressurized gas, and the mode of jetting by the top adds.
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 silicon content is higher than 2wt%.And when the not enough 2wt% of silicone content in the ferronickel, 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 refinery practice 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.
According to present embodiment, the sulphur content of handled high sulfur coarse nickel iron can reach more than the 0.25wt%, even can to handle sulphur content be the above high sulfur coarse nickel iron of 0.58wt%.
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 |
| 0.50％ | 0.4％ | 0.1％ | 1.9％ | 0.2％ |
Through behind the desulfurizing and 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％ |
Embodiment 2
Below with reference to the desulfurizing and refining technology of Fig. 3 description according to the high sulfur coarse nickel iron of the embodiment of the invention 2.
The key distinction of present embodiment and the foregoing description 1 is, 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.
Particularly, at first, carry out desulfurization in the mode identical with embodiment 1.Reach in sulphur content under the situation of product requirement, further add compound dephosphorization agent in the melt after desulfurization and carry out dephosphorization.
Because some is removed by reaction formula (8), (9) its contained phosphorus in sweetening process, in ensuing dephosphorizing process, except CaO, CaCO
3, CaF
2Outside also further add the iron protoxide skin.Wherein, described CaO, CaCO
3, CaF
2Deng the effect of playing slag making.In dephosphorizing process, following reaction except taking place, also takes place in (8), (9) reaction:
2P+5FeO+4CaO＝4CaO·P
2O
5+5Fe (10)
In the present embodiment, contain impurity in the handled thick ferronickel sample and content is as follows:
| S | Si | P | C | Cr |
| 0.50％ | 0.4％ | 0.1％ | 1.9％ | 0.2％ |
After desulfurization and dephosphorization refining, the foreign matter 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, and nickel iron refining technology according to the above embodiment of the present invention can be reduced to the sulfur impurity in the ferronickel, phosphorus, carbon, silicon etc. and satisfy the desired level of refining ferronickel product.
Embodiment 3
Below with reference to the desulfurizing and refining technology of Fig. 4 description according to the high sulfur coarse nickel iron of the embodiment of the invention 3.The key distinction of present embodiment and embodiment 2 is that the raw material that it adopted is the thick ferronickel of red soil nickel ore through sintering and thick refining gained.
Particularly, at first, be that 90: 10～95: 5 ratio is mixed according to weight ratio with red soil nickel ore and coal dust or coke powder, after this utilize rotary kiln 600～1000 ℃ of following sintering 2～8 hours, obtain the sintering nickel minerals.After this described sintering nickel minerals, flux and reductive agent are put into electric furnace and under 200V～300V, smelted 1～3 hour, obtain thick ferronickel.Then, pour the high sulfur coarse nickel iron of electric furnace output into the ferronickel jar, and carry out refining, thereby obtain the refining ferronickel according to the mode identical with embodiment 2.
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 (8)
1. the desulfurizing and refining technology of a high sulfur coarse nickel iron is characterized in that, may further comprise the steps:
1) providing initial temperature is the melt of the high sulfur coarse nickel iron more than 1450 ℃;
2) adding composite desulfurizing agent in the melt of described high sulfur coarse nickel iron stirs with desulfurization and by bottom feeding high pressure gas;
3) sulphur content of the described melt of detection,
When the sulphur content of described melt is that preset value stops desulfurization when following,
When being higher than preset value, the sulphur content of described melt detects the temperature of described melt,
When temperature is to skim below 1350 ℃ the time and make the described melt back repeating step 2 that heats up) until sulphur content be below the preset value till,
Repeating step 2 when temperature is higher than 1350 ℃) until sulphur content be below the preset value till, obtain refining Rhometal melt after skimming; And
4) Rhometal melt after the refining is cast and cooling and demolding, obtain refining Rhometal.
2. the desulfurizing and refining technology of high sulfur coarse nickel iron as claimed in claim 1 is characterized in that, the melt of described high sulfur coarse nickel iron is the melt of the high sulfur coarse nickel iron that obtained by electrosmelting.
3. the desulfurizing and refining technology of high sulfur coarse nickel iron as claimed in claim 1 is characterized in that, the sulphur content of described high sulfur coarse nickel iron is more than the 0.25wt%.
4. the desulfurizing and refining technology of high sulfur coarse nickel iron as claimed in claim 1 is characterized in that, contains the CaO of 82wt%～92wt%, the CaF of 2wt%～10wt% in the described composite desulfurizing agent
2And the CaCO of 3wt%～7wt%
3
5. the desulfurizing and refining technology of high sulfur coarse nickel iron as claimed in claim 1 is characterized in that, described composite desulfurizing agent also contains the Al powder of 1～10wt% and/or the C powder of 1～10wt%.
6. the desulfurizing and refining technology of high sulfur coarse nickel iron as claimed in claim 1 is characterized in that, the particle diameter of described composite desulfurizing agent is below the 75 μ m.
7. the desulfurizing and refining technology of high sulfur coarse nickel iron as claimed in claim 1 is characterized in that, described composite desulfurizing agent is that the mode that carrier is jetted by the top adds with the pressurized gas.
8. the desulfurizing and refining technology of high sulfur coarse nickel iron as claimed in claim 1 is characterized in that, described melt is heated up realize by aerating oxygen in described melt and Al powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100093055A CN102061358B (en) | 2011-01-17 | 2011-01-17 | Desulfuration refining process of high-sulfur crude ferronickel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100093055A CN102061358B (en) | 2011-01-17 | 2011-01-17 | Desulfuration refining process of high-sulfur crude ferronickel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102061358A true CN102061358A (en) | 2011-05-18 |
| CN102061358B CN102061358B (en) | 2012-12-26 |
Family
ID=43996864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100093055A Active CN102061358B (en) | 2011-01-17 | 2011-01-17 | Desulfuration refining process of high-sulfur crude ferronickel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102061358B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5198016A (en) * | 1990-11-05 | 1993-03-30 | Pechiney Electrometallurgie | Product for the desulphurization of molten pig iron or steel based on coated magnesium |
| CN101338353A (en) * | 2008-08-08 | 2009-01-07 | 昆明理工大学 | High sulfur coarse nickel iron refining desulphurization method |
| CN101386950A (en) * | 2008-10-17 | 2009-03-18 | 河北上大再生资源科技有限公司 | Nickel iron intermediate alloy and melting and purification treatment method thereof |
-
2011
- 2011-01-17 CN CN2011100093055A patent/CN102061358B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5198016A (en) * | 1990-11-05 | 1993-03-30 | Pechiney Electrometallurgie | Product for the desulphurization of molten pig iron or steel based on coated magnesium |
| CN101338353A (en) * | 2008-08-08 | 2009-01-07 | 昆明理工大学 | High sulfur coarse nickel iron refining desulphurization method |
| CN101386950A (en) * | 2008-10-17 | 2009-03-18 | 河北上大再生资源科技有限公司 | Nickel iron intermediate alloy and melting and purification treatment method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102061358B (en) | 2012-12-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102094094B (en) | Process for smelting ferronickel from red soil nickel ore | |
| CN104789718A (en) | Steel slag recycling method | |
| CN102952923A (en) | Process for smelting aluminum containing steel through calcium carbide deoxidation | |
| CN102061357B (en) | Dephosphorization refining process for phosphorus-containing coarse ferronickel | |
| SK19172000A3 (en) | Method for processing steel slags | |
| CN111961785B (en) | Method for producing ultra-pure pig iron by iron bath smelting reduction method | |
| CN108774662A (en) | A kind of induction furnace and RH-OB duplex techniques | |
| CN102747192B (en) | Method for smelting ultralow-sulfur steel | |
| CN103045793A (en) | Vacuum smelting device for converter and use method of vacuum smelting device | |
| CN105506226A (en) | Method for carrying out pre-desiliconization, pre-decarburization and pre-dephosphorization on molten iron in molten iron tank | |
| CN103643056B (en) | The smelting process of low carbon ferromanganese | |
| CN101403023A (en) | Ultra-deep desulfuration method for hot metal | |
| CN102994688B (en) | Pretreatment technology of terminal steel slag in converter | |
| CN203080002U (en) | Converter vacuum smelting device | |
| EP2039788A1 (en) | Dephosphorization method in the process of smelting ni-cr pig iron from a nickel oxide ore | |
| CN103643094A (en) | Smelting method of high-carbon ferromanganese | |
| CN202030814U (en) | Ferronickel refining system | |
| CN103074543A (en) | Manufacturing technology of steel containing molybdenum | |
| CN102108428B (en) | Refining process of crude nickel iron | |
| CN102061358B (en) | Desulfuration refining process of high-sulfur crude ferronickel | |
| CN100540686C (en) | A kind of process for making | |
| US6364929B1 (en) | Method for reprocessing steel slags and ferriferous materials | |
| CN102094099B (en) | Ferronickel refining system | |
| CN102649987A (en) | Method for improving slugging effect at dephosphorization stage by slag-less generation refining process (SGRP) smelting in converter | |
| CN107267850B (en) | The stainless steel smelting method of chromium in a kind of recycling smelting slag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |