CN104946832A - Method for producing nickel-contained molten iron by using laterite nickel ore - Google Patents
Method for producing nickel-contained molten iron by using laterite nickel ore Download PDFInfo
- Publication number
- CN104946832A CN104946832A CN201510368572.XA CN201510368572A CN104946832A CN 104946832 A CN104946832 A CN 104946832A CN 201510368572 A CN201510368572 A CN 201510368572A CN 104946832 A CN104946832 A CN 104946832A
- Authority
- CN
- China
- Prior art keywords
- red soil
- nickel ore
- soil nickel
- ore
- blast
- 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
Abstract
The invention provides a method for producing nickel-contained molten iron by using a laterite nickel ore. The method comprises the following steps: the laterite nickel ore is sintered, and is smelted in a blast furnace to obtain the nickel-contained molten iron; the binary alkalinity of the sintered ore is 0.5-1; and by 100% of the total weight of the blast furnace smelting slag system, the blast furnace smelting slag system contains 20-35 wt% of CaO, 35-50 wt% of SiO2, 14-25 wt% of MgO, and 2-20 wt% of Al2O3. The method for producing the nickel-contained molten iron by using the laterite nickel ore can reduce the smelting slag quantity and the coke ratio, decreases the energy consumption, improves the fluidity of the blast furnace smelting slag system, and reduces the smelting difficulty and cost.
Description
Technical field
The present invention relates to a kind of method utilizing red soil nickel ore to produce nickel-containing molten iron, be specifically related to a kind of adopt " sintering-blast furnace process " and utilize red soil nickel ore to produce the method for nickel-containing molten iron, belong to metallurgical and mine technology field.
Background technology
The nickel that Present Global is about 70wt% is produced for stainless steel.Whole world nickel ore resource mainly contains two kinds, and one is nickel sulfide ore, and another kind is red soil nickel ore.Nickel sulfide ore resource is day by day exhausted, and red soil nickel ore is the main source of following nickel resources, and red soil nickel ore contains part chromium element, is also the principal element that production stainless steel uses.
It is low that the technique using " sintering-blast furnace process " smelting red clay nickel ore to produce nickel-containing molten iron has investment, and technology maturation, not high to electric power interdependency, the features such as high financial profit is obvious, therefore, this technique at home and abroad all obtains and develops rapidly.
Red soil nickel ore is divided into limonite type red soil nickel ore, transition stratotype red soil nickel ore and serpentine type red soil nickel ore three types by deposit distribution from earth's surface to underground.The constituent contents such as iron, nickel, silicon, magnesium, aluminium are terraced distribution from earth's surface to underground.Limonite type red soil nickel ore has the feature of low nickel, high ferro, low silicon, low magnesium, high alumina, and each element content range is Ni:0.8-1.5wt%, TFe:40-55wt%, SiO
2: 1.5-10wt%, MgO:1-3wt%, Al
2o
3: 4-8wt%, Cr
2o
3: 2-3wt%.Serpentine type red soil nickel ore has the feature of nickelic, low iron, high silicon, Gao Mei, low aluminium, and each element content range is: Ni:1.8-3wt%, TFe:10-20wt%, SiO
2: 25-45wt%, MgO:15-25wt%, Al
2o
3: 1-2wt%, Cr
2o
3: 0.4-1wt%.The each element content range of transition stratotype red soil nickel ore is: Ni:1.5-1.8wt%, TFe:20-40wt%, SiO
2: 10-25wt%, MgO:3-15wt%, Al
2o
3: 2-4wt%, Cr
2o
3: 1-2wt%.
Mainly there is following several mode in the use of current red soil nickel ore: one is that ordinary blast is smelted, with addition of the limonite type red soil nickel ore of 5-10wt%, in order to reduce breeze cost; Two is molten iron that the limonite type smelting laterite-nickel ores on 100% upper strata, use mineral deposit obtains nickeliferous about 2wt%, and due to nickeliferous less, product generally presses molten iron valuation; Three is nickel-containing molten irons that 100% use bottom height nickel laterite (serpentine type red soil nickel ore) blast-furnace smelting produces 10-15%.First two using method can obtain certain profit when powdered iron ore price is high, but obviously loses competitive edge when current high-quality iron ore is significantly made a price reduction, and result also in a large amount of top layer laterites and is abandoned, piles and be stored in mine.The third method, when processing serpentine type red soil nickel ore, although can produce the nickel-containing molten iron obtaining 10-15wt%, due at present when with blast fumance nickel-containing molten iron, generally ignores high MgO in slag system, high SiO
2feature, the structure of slag system is not adjusted, cause slag system temperature of fusion too high, cause the quantity of slag in smelting process excessive further, coke ratio is too high, molten iron and slag poor fluidity, blast furnace operating is very difficult, finally have to add fluorite to increase mobility, but adding fluorite can corrode refractory materials in stove, reduces the work-ing life of blast furnace.
Summary of the invention
For solving the problems of the technologies described above, the object of the present invention is to provide a kind of method utilizing red soil nickel ore to produce nickel-containing molten iron.
For achieving the above object, the invention provides a kind of method utilizing red soil nickel ore to produce nickel-containing molten iron, the method comprises the following steps: carried out sintering and blast-furnace smelting by red soil nickel ore, obtain nickel-containing molten iron;
The dual alkalinity of described agglomerate is 0.5-1;
In the gross weight of described blast-furnace smelting slag system for 100%, described blast-furnace smelting slag system comprises the SiO of CaO, 35-50wt% of 20-35wt%
2, 14-25wt% the Al of MgO and 2-20wt%
2o
3.
According to the present invention some preferred embodiment, impurity component also containing other in above-mentioned blast-furnace smelting slag system, but the content of impurity component is considerably less, therefore ignore the impurity in blast-furnace smelting slag system in the present invention, think that this blast-furnace smelting slag system only comprises CaO, SiO
2, MgO and Al
2o
3these four kinds of components.
According to the present invention some preferred embodiment, the quaternary basicity of described blast-furnace smelting slag system is 0.8-1.2; The quaternary basicity of above-mentioned slag system is by (CaO+MgO)/(Al
2o
3+ SiO
2) mass values characterize.
According to the present invention some preferred embodiment, the dual alkalinity of above-mentioned agglomerate passes through CaO/SiO
2mass values characterize.
According to the present invention some preferred embodiment, in above-mentioned agglomerate, blast-furnace smelting slag system the content of CaO be by add flux (unslaked lime or Wingdale) amount decide.
According to the present invention some preferred embodiment, the iron of described red soil nickel ore, the mass ratio of nickel are 22-5.
According to the present invention some preferred embodiment, when producing the nickel-containing molten iron of 4-6wt%, described red soil nickel ore is selected from the combination of transition stratotype red soil nickel ore and/or limonite type red soil nickel ore, serpentine type red soil nickel ore and limonite type red soil nickel ore or the combination of limonite type red soil nickel ore, transition stratotype red soil nickel ore and serpentine type red soil nickel ore.
According to the present invention some preferred embodiment, when producing the nickel-containing molten iron of 4-6wt%, in the gross weight of described red soil nickel ore for 100%, described red soil nickel ore comprises the limonite type red soil nickel ore of 0-35wt% and the transition stratotype red soil nickel ore of 65-100wt%.
According to the present invention some preferred embodiment, when producing the nickel-containing molten iron of 4-6wt%, in the gross weight of described red soil nickel ore for 100%, described red soil nickel ore comprises the limonite type red soil nickel ore of 0-55wt% and the serpentine type red soil nickel ore of 45-100wt%.
According to the present invention some preferred embodiment, when producing the nickel-containing molten iron of 4-6wt%, in the gross weight of described red soil nickel ore for 100%, described red soil nickel ore comprises the serpentine type red soil nickel ore of the limonite type red soil nickel ore of 10-50wt%, the transition stratotype red soil nickel ore of 5-40wt% and 20-85wt%.
According to the present invention some preferred embodiment, when producing the nickel-containing molten iron of 6-10wt%, described red soil nickel ore is selected from the combination of serpentine type red soil nickel ore and/or transition stratotype red soil nickel ore, serpentine type red soil nickel ore and limonite type red soil nickel ore or the combination of limonite type red soil nickel ore, transition stratotype red soil nickel ore and serpentine type red soil nickel ore.
According to the present invention some preferred embodiment, when producing the nickel-containing molten iron of 6-10wt%, in the gross weight of described red soil nickel ore for 100%, described red soil nickel ore comprises the transition stratotype red soil nickel ore of 0-65wt% and the serpentine type red soil nickel ore of 35-100wt%.
According to the present invention some preferred embodiment, when producing the nickel-containing molten iron of 6-10wt%, in the gross weight of described red soil nickel ore for 100%, described red soil nickel ore comprises the limonite type red soil nickel ore of 0-55wt% and the serpentine type red soil nickel ore of 45-100wt%.
According to the present invention some preferred embodiment, when producing the nickel-containing molten iron of 6-10wt%, in the gross weight of described red soil nickel ore for 100%, described red soil nickel ore comprises the serpentine type red soil nickel ore of the limonite type red soil nickel ore of 10-50wt%, the transition stratotype red soil nickel ore of 5-40wt% and 20-85wt%.
It should be noted that the nickel-containing molten iron of 10wt% can only be produced by the serpentine type red soil nickel ore of 100% to obtain, other material combination, as the combination of limonite type red soil nickel ore, transition stratotype red soil nickel ore and serpentine type red soil nickel ore; Or the combination of limonite type red soil nickel ore and serpentine type red soil nickel ore, because its nickel content is inadequate, so can not be used for preparing the nickel-containing molten iron of 10wt%.
According to the present invention some preferred embodiment, when producing the nickel-containing molten iron of 10-15wt%, described red soil nickel ore is serpentine type red soil nickel ore.
According to the present invention some preferred embodiment, the tapping temperature of described blast-furnace smelting is 1450 DEG C-1550 DEG C.
According to the present invention some preferred embodiment, the sintering negative pressure of described sintering is 8000-14000Pa, and the sintering temperature in sintering process and other conditions can be determined by fuel (the fixed carbon cubage with in the fuel) proportioning in blending process.
According to the present invention some preferred embodiment, said method comprising the steps of: red soil nickel ore through screening, broken, dehydration, batching, mixing, granulate, after cloth, sintering carried out to it and obtains agglomerate;
By described agglomerate through cooling, screening, obtains finished product agglomerate, then carries out blast-furnace smelting to finished product agglomerate, obtain nickel-containing molten iron.
According to the present invention some preferred embodiment, described red soil nickel ore is through screening, obtain the red soil nickel ore that grade is-50mm after fragmentation;
In a preferred embodiment of the invention, above-mentioned screening, fragmentation are carried out according to following steps: sieved by red soil nickel ore, obtain the red soil nickel ore that grade is-50mm, screening out the red soil nickel ore that grade is+50mm, is that the red soil nickel ore of+50mm carries out using after fragmentation makes the grade of the red soil nickel ore of+50mm meet the requirements by grade.
According to the present invention some preferred embodiment, described red soil nickel ore through dehydration after, its water content is 20-30wt%; Described dehydration is the technique means of this area routine, and the dehydration in the present invention comprises two kinds of methods: one adopts to store up digestion dehydration with addition of unslaked lime in red soil nickel ore raw material; Another kind adopts dry kiln to dewater to red soil nickel ore;
According to the present invention some preferred embodiment, when adopting dry kiln to dewater to red soil nickel ore, drying temperature during dehydration is about 300-800 DEG C, and time of drying is 5min-20min, the water content of the red soil nickel ore after dehydration is 20-30wt%.
According to the present invention some preferred embodiment, described mixing can be carried out according to following steps: by dehydration after red soil nickel ore, flux, fuel and mixing of returning mine, obtain compound.
According to the present invention some preferred embodiment, in the gross weight of this compound for 100%, described fixed carbon is 8-16wt%, returns mine as 20-30wt%.
According to the present invention some preferred embodiment, described fixed carbon is 8-12wt%; Describedly to return mine as 25wt%.
According to the present invention some preferred embodiment, described flux comprises unslaked lime or Wingdale, and described fuel comprises coke powder or coal dust.
According to the present invention some preferred embodiment, the particle diameter of the grain that obtains after described granulation group is 1-8mm.
According to the present invention some preferred embodiment, will prevent excessive binder when cloth, reduce external force to the destruction of bed of material natural structure, after cloth, the thickness of the bed of material is 500-1200mm as far as possible.
According to the present invention some preferred embodiment, after cloth, the thickness of the bed of material is 700-1000mm.
According to the present invention some preferred embodiment, after cloth, the water content of described compound is 18-30wt%; Be preferably 20-25wt%.
According to the present invention some preferred embodiment, described agglomerate is cooled to less than 150 DEG C, screening, obtain finished product agglomerate, the grade of described finished product agglomerate is+5mm.
According to the present invention some preferred embodiment, said method comprising the steps of:
Red soil nickel ore through screening, broken, dehydration, batching, mixing, granulate, after cloth, sintering carried out to it and obtains agglomerate;
By described agglomerate through cooling, screening, obtains finished product agglomerate, then carries out blast-furnace smelting to finished product agglomerate, obtain nickel-containing molten iron.
The first step: choose red soil nickel ore
Choose limonite type red soil nickel ore, transition type red soil nickel ore and serpentine type red soil nickel ore respectively, make it meet following requirement:
When producing the nickel-containing molten iron of 8wt%, in limonite type red soil nickel ore, transition stratotype red soil nickel ore and serpentine type red soil nickel ore three kinds mixing red soil nickel ore, the content of each element need meet following requirement: Ni is 1.8wt%, TFe is 18.7wt%, the grade of nickel, iron can be floated, but iron nickel ratio need be met and be about 10.4, require SiO simultaneously
2, MgO, Al
2o
3content Deng gangue mineral is as far as possible low, and suitable agglomerate dual alkalinity is 0.5-0.7.
When producing the nickel-containing molten iron of 6wt%, in limonite type red soil nickel ore, transition stratotype red soil nickel ore and serpentine type red soil nickel ore three kinds mixing red soil nickel ore, the content of each element need meet following requirement: Ni is 1.6wt%, TFe is 22.8wt%, the grade of nickel, iron can be floated, but iron nickel ratio need be met and be about 14.2, require SiO simultaneously
2, MgO, Al
2o
3content Deng gangue mineral is as far as possible low, and suitable agglomerate dual alkalinity is 0.6-0.8.
When producing the nickel-containing molten iron of 4wt%, in limonite type red soil nickel ore, transition stratotype red soil nickel ore and serpentine type red soil nickel ore three kinds mixing red soil nickel ore, the content of each element need meet following requirement: Ni is 1.4wt%, TFe is 30.8wt%, the grade of nickel, iron can be floated, but iron nickel ratio need be met and be about 22, require SiO simultaneously
2, MgO, Al
2o
3content Deng gangue mineral is as far as possible low, and suitable agglomerate dual alkalinity is 0.6-0.8.
Can the production concentration nickel-containing molten iron that is 4-15wt% by the method utilizing red soil nickel ore to produce nickel-containing molten iron of the present invention, only lift three examples above, the present invention is not limited to above-mentioned three examples.
Second step: screening, fragmentation
Being sieved by red soil nickel ore, obtain the red soil nickel ore that grade is-50mm, screen out the red soil nickel ore that grade is+50mm, is that the red soil nickel ore of+50mm carries out using after fragmentation makes the grade of the red soil nickel ore of+50mm meet the requirements by grade.
3rd step: dehydration
Dewatered by red soil nickel ore after screening, dewater as the technique means of this area routine, the dehydration in the present invention can adopt two kinds of methods: one stores up digestion dehydration with addition of unslaked lime in red soil nickel ore raw material; Another kind is dewatered to red soil nickel ore raw material by dry kiln; Wherein, drying temperature when adopting dry kiln to dewater to red soil nickel ore raw material is about 300-800 DEG C, and time of drying is 5min-20min.Before dehydration, the water content of red soil nickel ore is generally 35-40wt%, and the water content (mechanical water mass percent) of the red soil nickel ore after dehydration is 20-30wt%; The present invention some preferred embodiment in, described water content is 20-25wt%.
4th step: batching
5th step: mixing
Described mixing can be carried out according to following steps: by red soil nickel ore, flux, the fuel after dehydration and mixing of returning mine, obtain compound;
In the gross weight of this compound for 100%, described fixed carbon is 8-16wt%, returns mine as 20-30wt%.
The present invention some preferred embodiment in, described fixed carbon is 8-12wt%; Describedly return mine as 25wt%; Described flux comprises unslaked lime or Wingdale, and described fuel comprises coke powder or coal dust.
5th step: granulate
Granulate to the compound obtained after batching, the particle diameter of the grain group obtained after granulation is 1-8mm.
6th step: cloth
Will prevent excessive binder when cloth, reduce external force to the destruction of bed of material natural structure, after cloth, the thickness of the bed of material is 500-1200mm as far as possible; The water content of compound is 18-30wt%; The present invention some preferred embodiment, after cloth, the thickness of the bed of material is 700-1000mm; The water content of compound is 20-25wt%.
7th step: sintering
Sinter after cloth, obtain agglomerate; Sintering negative pressure is 8000-14000Pa, and igniting negative pressure is 6000pa, ignition temperature is 1100 ± 50 DEG C, the dual alkalinity CaO/SiO of described agglomerate
2for 0.5-1.
8th step: cooling, screening
Described agglomerate is cooled to less than 150 DEG C, and screening after cooling, sift out the finished product agglomerate of+5mm, the grate-layer material of 10-20mm and the sinter return fine of-5mm, this sinter return fine adds in blending process again to carry out recycle.
9th step: blast-furnace smelting
According to the requirement of blast-furnace smelting slag system, can suitably with addition of flux and fluorite in blast furnace ironmaking process; Optimal situation is: in blast furnace ironmaking process, do not add flux and fluorite, only uses finished product agglomerate and coke to smelt, and produces the nickeliferous molten iron for 4wt%-15wt%; Smelting temperature in blast furnace ironmaking process is 1450 DEG C-1550 DEG C; In the gross weight of described blast-furnace smelting slag system for 100%, described slag system comprises the SiO of CaO, 35-50wt% of 20-35wt%
2, 14-25wt% the Al of MgO and 2-20wt%
2o
3; Quaternary basicity (CaO+MgO)/(Al of described blast-furnace smelting slag system
2o
3+ SiO
2) be 0.8-1.2.
The method of being produced nickel-containing molten iron by step comprehensive utilization of laterite nickel ore of the present invention can obtain the nickel-containing molten iron that nickel content is 4-15wt% (in the gross weight of nickel-containing molten iron for 100%).
At present, when adopting blast furnace process smelting red clay nickel ore, due to slag system temperature of fusion high (>=1500 DEG C), usually adopt and control sintering low alkalinity, the method for flux and fluorite of adding at blast furnace is to reduce the melt temperature of slag system, to obtain the direct motion of blast furnace, but sintering low alkalinity can cause the of low quality of agglomerate, adds flux and fluorite not only significantly increases energy consumption at blast furnace, and to blast furnace, there is extremely strong corrodibility due to fluorite, can blast furnace campaign be shortened, increase the cost smelted.
Produce at step comprehensive utilization of laterite nickel ore of the present invention in the method for nickel-containing molten iron, in the gross weight of described blast-furnace smelting slag system for 100%, described blast-furnace smelting slag system comprises the SiO of CaO, 35-50wt% of 20-35wt%
2, 14-25wt% the Al of MgO and 2-20wt%
2o
3, make the quaternary basicity of blast-furnace smelting slag system be 0.8-1.2, above-mentioned blast-furnace smelting slag system can reduce temperature of fusion during smelting laterite-nickel ores, strengthens the mobility of smelting slag system; Utilize simultaneously each element of red soil nickel ore from earth's surface the terraced distribution rule to underground, control upper strata, mineral deposit (limonite type red soil nickel ore), lower floor's (serpentine type red soil nickel ore); Upper strata (limonite type red soil nickel ore), middle level red soil nickel ore (transition stratotype red soil nickel ore); Middle level (transition stratotype red soil nickel ore), lower floor's (serpentine type red soil nickel ore); Upper (limonite type red soil nickel ore), in (transition stratotype red soil nickel ore), lower floor's (serpentine type red soil nickel ore) red soil nickel ore blending ratio, control the dual alkalinity of agglomerate, not only can intensified-sintered mineral amount, and greatly can reduce the temperature of fusion of blast-furnace smelting slag system, under the temperature condition of 1450 DEG C-1550 DEG C, do not add or add less flux and fluorite just can realize smelting, blast-furnace smelting slag system has dynamic property preferably, also reduces energy consumption simultaneously; The nickeliferous molten iron for 4-15wt% can be obtained by method of the present invention.
The present invention is by the specific high silicon Smelting magnesium slag system of design red soil nickel ore, and the Appropriate application to red soil nickel ore ore bed, improve upper strata, mineral deposit value-added content of product, improve the content of nickel in the laterite of upper strata, mineral deposit, reduce the content of aluminium in the upper ore of mineral deposit, improve the content of iron in mineral deposit lower floor laterite, reduce silicon in mineral deposit lower floor ore, the content of the gangue elements such as magnesium, decrease the smelting quantity of slag, and the present invention is by controlling silicon, magnesium, the scope of the constituent contents such as aluminium, control sintering dual alkalinity at 0.5-1.0, reduce smelting coke ratio, improve the mobility of nickel-containing molten iron and blast-furnace smelting slag system, finally achieve minimizing energy consumption, reduce smelting cost, reduce and smelt difficulty, save the object of nickel resources.
Embodiment
To be explained the Advantageous Effects of implementation process of the present invention and generation by specific embodiment below, object is to help reader to understand essence of the present invention and feature better, but not as can the restriction of practical range to this case.
Embodiment 1
Present embodiments provide a kind of method that red soil nickel ore produces nickel-containing molten iron, the method comprises the following steps:
Choosing 100% serpentine type red soil nickel ore (grade is-50mm) is raw materials for metallurgy, and carry out processed to serpentine type red soil nickel ore, after processed, its water content is 28wt%;
Above-mentioned processed can adopt stores up digestion dehydration with addition of unslaked lime in serpentine type red soil nickel ore raw material, dry kiln can also be adopted to dewater to red soil nickel ore, these two kinds of dewaterings are the routine dehydration means of this area, under the prerequisite realizing dehydration object, those skilled in the art can require to select suitable dewatering and suitable operational condition according to site work;
Carry out again preparing burden, mixing, mixing of returning mine is joined by serpentine type red soil nickel ore, flux (unslaked lime), fuel (coke powder) and the outer of 25wt%, obtain compound, the water content of this compound is 23wt%, and fixed carbon content is 10wt%;
Again compound is granulated, cloth, the thickness of the bed of material is 600mm;
Then, compound is sintered, sintering negative pressure is 12000Pa, igniting negative pressure is 6000pa, ignition temperature is 1100 ± 50 DEG C, agglomerate dual alkalinity CaO/SiO
2be 0.6, after terminating, obtain agglomerate, the yield rate of agglomerate is 72wt%, barrate strength is 65wt%;
Next carry out blast-furnace smelting, add 30kg/t
ironfluorite, in blast-furnace smelting slag system, the content of each component is respectively: CaO:25.6wt%, SiO
2: 45.64wt%, MgO:21.04wt%, Al
2o
3: 2.73wt%, quaternary basicity (CaO+MgO)/(Al of blast-furnace smelting slag system
2o
3+ SiO
2) be 0.96, blast-furnace smelting coke ratio is 2.2t/t
iron, slag iron is than being 4.9t/t
iron, under tapping temperature is 1450-1550 DEG C of condition, can slag tap smoothly.
The nickel content of the nickel-containing molten iron that the method for producing nickel-containing molten iron by the red soil nickel ore of the present embodiment obtains is 10wt%.
Embodiment 2
Present embodiments provide a kind of method that red soil nickel ore produces nickel-containing molten iron, the method comprises the following steps:
Red soil nickel ore (grade is-50mm) in the present embodiment comprises the limonite type red soil nickel ore of the serpentine type red soil nickel ore of 80wt%, the transition stratotype red soil nickel ore of 8wt% and 12wt%, processed is carried out to above-mentioned mixing red soil nickel ore, after processed, its water content is 28wt%;
Above-mentioned processed can adopt stores up digestion dehydration with addition of unslaked lime in mixing red soil nickel ore raw material, dry kiln can also be adopted to dewater to red soil nickel ore, these two kinds of dewaterings are the routine dehydration means of this area, under the prerequisite realizing dehydration object, those skilled in the art can require to select suitable dewatering and suitable operational condition according to site work;
Carry out again preparing burden, mixing, mixing of returning mine is joined by above-mentioned mixing red soil nickel ore, flux (unslaked lime), fuel (coke powder) and the outer of 25wt%, obtain compound, the water content of this compound is 23wt%, and fixed carbon content is 10wt%;
Again compound is granulated, cloth, the thickness of the bed of material is 600mm;
Then, compound is sintered, sintering negative pressure is 12000Pa, igniting negative pressure is 6000pa, ignition temperature is 1100 ± 50 DEG C, agglomerate dual alkalinity CaO/SiO
2be 0.6, after terminating, obtain agglomerate, the yield rate of agglomerate is 78wt%, barrate strength is 67wt%;
Next carry out blast-furnace smelting, add 20kg/t
ironfluorite, in blast-furnace smelting slag system, the content of each component is respectively: CaO:25.98wt%, SiO
2: 45.33wt%, MgO:20.92wt%, Al
2o
3: 2.77wt%, quaternary basicity (CaO+MgO)/(Al of blast-furnace smelting slag system
2o
3+ SiO
2) be 0.98, blast-furnace smelting coke ratio is 2.0t/t
iron, slag iron is than being 4.4t/t
iron, under tapping temperature is 1450-1550 DEG C of condition, can slag tap smoothly.
The nickel content of the nickel-containing molten iron that the method for producing nickel-containing molten iron by the red soil nickel ore of the present embodiment obtains is 8wt%.
Embodiment 3
Present embodiments provide a kind of method that red soil nickel ore produces nickel-containing molten iron, the method comprises the following steps:
Red soil nickel ore (grade is-50mm) in the present embodiment comprises the limonite type red soil nickel ore of the serpentine type red soil nickel ore of 50wt%, the transition stratotype red soil nickel ore of 30wt% and 20wt%, processed is carried out to above-mentioned mixing red soil nickel ore, after processed, its water content is 28wt%;
Above-mentioned processed can adopt stores up digestion dehydration with addition of unslaked lime in mixing red soil nickel ore raw material, dry kiln can also be adopted to dewater to red soil nickel ore, these two kinds of dewaterings are the routine dehydration means of this area, under the prerequisite realizing dehydration object, those skilled in the art can require to select suitable dewatering and suitable operational condition according to site work;
Carry out again preparing burden, mixing, mixing of returning mine is joined by above-mentioned mixing red soil nickel ore, flux (unslaked lime), fuel (coke powder) and the outer of 25wt%, obtain compound, the water content of this compound is 23wt%, and fixed carbon content is 10wt%;
Again compound is granulated, cloth, the thickness of the bed of material is 600mm;
Then, compound is sintered, sintering negative pressure is 12000Pa, igniting negative pressure is 6000pa, ignition temperature is 1100 ± 50 DEG C, agglomerate dual alkalinity CaO/SiO
2be 0.7, after terminating, obtain agglomerate, the yield rate of agglomerate is 79wt%, barrate strength is 68wt%;
Next carry out blast-furnace smelting, do not add fluorite, in blast-furnace smelting slag system, the content of each component is respectively: CaO:25.98wt%, SiO
2: 45.33wt%, MgO:20.92wt%, Al
2o
3: 2.77wt%, quaternary basicity (CaO+MgO)/(Al of blast-furnace smelting slag system
2o
3+ SiO
2) be 0.97, blast-furnace smelting coke ratio is 1.6t/t
iron, slag iron is than being 2.9t/t
iron, under tapping temperature is 1450-1550 DEG C of condition, can slag tap smoothly.
The nickel content of the nickel-containing molten iron that the method for producing nickel-containing molten iron by the red soil nickel ore of the present embodiment obtains is 6wt%.
Embodiment 4
Present embodiments provide a kind of method that red soil nickel ore produces nickel-containing molten iron, the method comprises the following steps:
Red soil nickel ore (grade is-50mm) in the present embodiment comprises the limonite type red soil nickel ore of the serpentine type red soil nickel ore of 40wt%, the transition stratotype red soil nickel ore of 10wt% and 50wt%, processed is carried out to above-mentioned mixing red soil nickel ore, after processed, its water content is 28wt%;
Above-mentioned processed can adopt stores up digestion dehydration with addition of unslaked lime in mixing red soil nickel ore raw material, dry kiln can also be adopted to dewater to red soil nickel ore, these two kinds of dewaterings are the routine dehydration means of this area, under the prerequisite realizing dehydration object, those skilled in the art can require to select suitable dewatering and suitable operational condition according to site work;
Carry out again preparing burden, mixing, mixing of returning mine is joined by above-mentioned mixing red soil nickel ore, flux (unslaked lime), fuel (coke powder) and the outer of 25wt%, obtain compound, the water content of this compound is 23wt%, and fixed carbon content is 10wt%;
Again compound is granulated, cloth, the thickness of the bed of material is 600mm;
Then, compound is sintered, sintering negative pressure is 12000Pa, igniting negative pressure is 6000pa, ignition temperature is 1100 ± 50 DEG C, agglomerate dual alkalinity CaO/SiO
2be 0.7, after terminating, obtain agglomerate, the yield rate of agglomerate is 80wt%, barrate strength is 68wt%;
Next carry out blast-furnace smelting, do not add fluorite, in blast-furnace smelting slag system, the content of each component is respectively: CaO:27.87wt%, SiO
2: 43.54wt%, MgO:17.36wt%, Al
2o
3: 6.24wt%, quaternary basicity (CaO+MgO)/(Al of blast-furnace smelting slag system
2o
3+ SiO
2) be 0.91, blast-furnace smelting coke ratio is 1.2t/t
iron, slag iron is than being 2t/t
iron, under tapping temperature is 1450-1550 DEG C of condition, can slag tap smoothly.
The nickel content of the nickel-containing molten iron that the method for producing nickel-containing molten iron by the red soil nickel ore of the present embodiment obtains is 4wt%.
Embodiment 5
Present embodiments provide a kind of method that red soil nickel ore produces nickel-containing molten iron, the method comprises the following steps:
Red soil nickel ore (grade is-50mm) in the present embodiment comprises the serpentine type red soil nickel ore of 70wt% and the limonite type red soil nickel ore of 30wt%, carries out processed to above-mentioned mixing red soil nickel ore, and after processed, its water content is 28wt%;
Above-mentioned processed can adopt stores up digestion dehydration with addition of unslaked lime in mixing red soil nickel ore raw material, dry kiln can also be adopted to dewater to red soil nickel ore, these two kinds of dewaterings are the routine dehydration means of this area, under the prerequisite realizing dehydration object, those skilled in the art can require to select suitable dewatering and suitable operational condition according to site work;
Carry out again preparing burden, mixing, mixing of returning mine is joined by above-mentioned mixing red soil nickel ore, flux (unslaked lime), fuel (coke powder) and the outer of 25wt%, obtain compound, the water content of this compound is 23wt%, and fixed carbon content is 10wt%;
Again compound is granulated, cloth, the thickness of the bed of material is 600mm;
Then, compound is sintered, sintering negative pressure is 12000Pa, igniting negative pressure is 6000pa, ignition temperature is 1100 ± 50 DEG C, agglomerate dual alkalinity CaO/SiO
2be 0.7, after terminating, obtain agglomerate, the yield rate of agglomerate is 77wt%, barrate strength is 65wt%;
Next carry out blast-furnace smelting, do not add fluorite, in blast-furnace smelting slag system, the content of each component is respectively: CaO:26.72wt%, SiO
2: 45.73wt%, MgO:19.47wt%, Al
2o
3: 3.08wt%, quaternary basicity (CaO+MgO)/(Al of blast-furnace smelting slag system
2o
3+ SiO
2) be 0.95, blast-furnace smelting coke ratio is 1.7t/t
iron, slag iron is than being 3t/t
iron, under tapping temperature is 1450-1550 DEG C of condition, can slag tap smoothly.
The nickel content of the nickel-containing molten iron that the method for producing nickel-containing molten iron by the red soil nickel ore of the present embodiment obtains is 6wt%.
Embodiment 6
Present embodiments provide a kind of method that red soil nickel ore produces nickel-containing molten iron, the method comprises the following steps:
Red soil nickel ore (grade is-50mm) in the present embodiment comprises the transition stratotype red soil nickel ore of 65wt% and the limonite type red soil nickel ore of 35wt%, carries out processed to above-mentioned mixing red soil nickel ore, and after processed, its water content is 28wt%;
Above-mentioned processed can adopt stores up digestion dehydration with addition of unslaked lime in mixing red soil nickel ore raw material, dry kiln can also be adopted to dewater to red soil nickel ore, these two kinds of dewaterings are the routine dehydration means of this area, under the prerequisite realizing dehydration object, those skilled in the art can require to select suitable dewatering and suitable operational condition according to site work;
Carry out again preparing burden, mixing, mixing of returning mine is joined by above-mentioned mixing red soil nickel ore, flux (unslaked lime), fuel (coke powder) and the outer of 25wt%, obtain compound, the water content of this compound is 23wt%, and fixed carbon content is 10wt%;
Again compound is granulated, cloth, the thickness of the bed of material is 600mm;
Then, compound is sintered, sintering negative pressure is 12000Pa, igniting negative pressure is 6000pa, ignition temperature is 1100 ± 50 DEG C, agglomerate dual alkalinity CaO/SiO
2be 0.7, after terminating, obtain agglomerate, the yield rate of agglomerate is 79wt%, barrate strength is 69wt%;
Next carry out blast-furnace smelting, do not add fluorite, in blast-furnace smelting slag system, the content of each component is respectively: CaO:27.48wt%, SiO
2: 44.00wt%, MgO:17.30wt%, Al
2o
3: 6.22wt%, quaternary basicity (CaO+MgO)/(Al of blast-furnace smelting slag system
2o
3+ SiO
2) be 0.9, blast-furnace smelting coke ratio is 1.22t/t
iron, slag iron is than being 2.1t/t
iron, under tapping temperature is 1450-1550 DEG C of condition, can slag tap smoothly.
The nickel content of the nickel-containing molten iron that the method for producing nickel-containing molten iron by the red soil nickel ore of the present embodiment obtains is 4wt%.
Embodiment 7
Present embodiments provide a kind of method that red soil nickel ore produces nickel-containing molten iron, the method comprises the following steps:
The transition stratotype red soil nickel ore that red soil nickel ore (grade is-50mm) in the present embodiment is 100wt%, carry out processed to above-mentioned transition stratotype red soil nickel ore, after processed, its water content is 28wt%;
Above-mentioned processed can adopt stores up digestion dehydration with addition of unslaked lime in transition stratotype red soil nickel ore raw material, dry kiln can also be adopted to dewater to transition stratotype red soil nickel ore, these two kinds of dewaterings are the routine dehydration means of this area, under the prerequisite realizing dehydration object, those skilled in the art can require to select suitable dewatering and suitable operational condition according to site work;
Carry out again preparing burden, mixing, mixing of returning mine is joined by above-mentioned transition stratotype red soil nickel ore, flux (unslaked lime), fuel (coke powder) and the outer of 25wt%, obtain compound, the water content of this compound is 23wt%, and fixed carbon content is 10wt%;
Again compound is granulated, cloth, the thickness of the bed of material is 600mm;
Then, compound is sintered, sintering negative pressure is 12000Pa, igniting negative pressure is 6000pa, ignition temperature is 1100 ± 50 DEG C, agglomerate dual alkalinity CaO/SiO
2be 0.7, after terminating, obtain agglomerate, the yield rate of agglomerate is 75wt%, barrate strength is 64wt%;
Next carry out blast-furnace smelting, do not add fluorite, in blast-furnace smelting slag system, the content of each component is respectively: CaO:27.36wt%, SiO
2: 45.64wt%, MgO:18.97wt%, Al
2o
3: 3.03wt%, quaternary basicity (CaO+MgO)/(Al of blast-furnace smelting slag system
2o
3+ SiO
2) be 0.95, blast-furnace smelting coke ratio is 1.6t/t
iron, slag iron is than being 3.05t/t
iron, under tapping temperature is 1450-1550 DEG C of condition, can slag tap smoothly.
The nickel content of the nickel-containing molten iron that the method for producing nickel-containing molten iron by the red soil nickel ore of the present embodiment obtains is 6wt%.
Reference examples 1
This reference examples provides a kind of method that red soil nickel ore produces nickel-containing molten iron, and the method comprises the following steps:
Choosing 100% serpentine type red soil nickel ore (grade is-50mm) is raw materials for metallurgy, and carry out processed to serpentine type red soil nickel ore, after processed, its water content is 28wt%;
Above-mentioned processed can adopt stores up digestion dehydration with addition of unslaked lime in serpentine type red soil nickel ore raw material, dry kiln can also be adopted to dewater to serpentine type red soil nickel ore, these two kinds of dewaterings are the routine dehydration means of this area, under the prerequisite realizing dehydration object, those skilled in the art can require to select suitable dewatering and suitable operational condition according to site work;
Carry out again preparing burden, mixing, mixing of returning mine is joined by serpentine type red soil nickel ore, flux (unslaked lime), fuel (coke powder) and the outer of 25wt%, obtain compound, the water content of this compound is 23wt%, and fixed carbon content is 10wt%; Again compound is granulated, cloth, the thickness of the bed of material is 600mm;
Then, compound is sintered, sintering negative pressure is 12000Pa, igniting negative pressure is 6000pa, ignition temperature is 1100 ± 50 DEG C, agglomerate dual alkalinity CaO/SiO
2be 0.25, after terminating, obtain agglomerate, the yield rate of agglomerate is 51wt%, barrate strength is 58wt%;
Next carry out blast-furnace smelting, in blast furnace ironmaking process, add 100kg/t
ironunslaked lime, 120kg/t
ironfluorite, in blast-furnace smelting slag system, the content of each component is respectively: CaO:14.24wt%, SiO
2: 51.68wt%, MgO:26.02wt%, Al
2o
3: 3.07wt%, quaternary basicity (CaO+MgO)/(Al of blast-furnace smelting slag system
2o
3+ SiO
2) be 0.74, blast-furnace smelting coke ratio is 3.2t/t
iron, slag iron is than being 6.5t/t
iron, under tapping temperature is 1450-1550 DEG C of condition, difficulty of slagging tap, must add the mobility that a large amount of fluorites could improve slag system, and fluorite is serious to refractory corrosion in blast furnace;
The nickel content of the nickel-containing molten iron that the method for producing nickel-containing molten iron by the red soil nickel ore of the present embodiment obtains is 10wt%.
Reference examples 2
This reference examples provides a kind of method that red soil nickel ore produces nickel-containing molten iron, and the method comprises the following steps:
Red soil nickel ore (grade is-50mm) in the present embodiment comprises the limonite type red soil nickel ore of the serpentine type red soil nickel ore of 80wt%, the transition stratotype red soil nickel ore of 8wt% and 12wt%, processed is carried out to above-mentioned mixing red soil nickel ore, after processed, its water content is 28wt%;
Above-mentioned processed can adopt stores up digestion dehydration with addition of unslaked lime in mixing red soil nickel ore raw material, dry kiln can also be adopted to dewater to mixing red soil nickel ore, these two kinds of dewaterings are the routine dehydration means of this area, under the prerequisite realizing dehydration object, those skilled in the art can require to select suitable dewatering and suitable operational condition according to site work;
Carry out again preparing burden, mixing, mixing of returning mine is joined by above-mentioned mixing red soil nickel ore, flux (unslaked lime), fuel (coke powder) and the outer of 25wt%, obtain compound, the water content of this compound is 23wt%, and fixed carbon content is 10wt%;
Again compound is granulated, cloth, the thickness of the bed of material is 600mm;
Then, compound is sintered, sintering negative pressure is 12000Pa, igniting negative pressure is 6000pa, ignition temperature is 1100 ± 50 DEG C, agglomerate dual alkalinity CaO/SiO
2be 0.25, after terminating, obtain agglomerate, the yield rate of agglomerate is 52wt%, barrate strength is 51wt%;
Next carry out blast-furnace smelting, in blast furnace ironmaking process, add 100kg/t
ironunslaked lime, 110kg/t
ironfluorite, in blast-furnace smelting slag system, the content of each component is respectively: CaO:14.42wt%, SiO
2: 52.08wt%, MgO:25.34wt%, Al
2o
3: 3.16wt%, quaternary basicity (CaO+MgO)/(Al of blast-furnace smelting slag system
2o
3+ SiO
2) be 0.72, blast-furnace smelting coke ratio is 2.9t/t
iron, slag iron is than being 6.1t/t
iron, under tapping temperature is 1450-1550 DEG C of condition, difficulty of slagging tap, must add the mobility that a large amount of fluorites could improve slag system, and fluorite is serious to refractory corrosion in blast furnace;
The nickel content of the nickel-containing molten iron that the method for producing nickel-containing molten iron by the red soil nickel ore of the present embodiment obtains is 8wt%.
Compare example 1 and embodiment 1, blast-furnace smelting slag system quaternary basicity (CaO+MgO)/(Al in reference examples 1
2o
3+ SiO
2) be 0.74, agglomerate dual alkalinity CaO/SiO
2be 0.25, in reference examples 1, the yield rate of agglomerate is 51wt%, and barrate strength is 58wt%, and blast-furnace smelting coke ratio is 3.2t/t
iron, slag iron is than being 6.5t/t
iron, the addition of fluorite is 120kg/t
iron; And blast-furnace smelting slag system quaternary basicity (CaO+MgO)/(Al in embodiment 1
2o
3+ SiO
2) be 0.96, agglomerate dual alkalinity CaO/SiO
2be 0.6, the yield rate 72wt% of agglomerate in embodiment 1, barrate strength is 65wt%, and blast-furnace smelting coke ratio is 2.2t/t
iron, slag iron is than being 4.9t/t
iron, the addition of fluorite is 30kg/t
iron; This shows, along with the raising of blast-furnace smelting slag system quaternary basicity, agglomerate dual alkalinity, yield rate and the barrate strength of agglomerate all significantly improve, blast-furnace smelting coke ratio and slag iron ratio decline to a great extent simultaneously, and under 1450-1550 DEG C of condition, slag system has good mobility, slags tap smoothly; Significantly can reduce the usage quantity of fluorite simultaneously, extend the work-ing life of blast furnace.
Compare example 2 and embodiment 2, blast-furnace smelting slag system quaternary basicity (CaO+MgO)/(Al in reference examples 2
2o
3+ SiO
2) be 0.72, agglomerate dual alkalinity CaO/SiO
2be 0.25, in reference examples 2, the yield rate of agglomerate is 52wt%, and barrate strength is 51wt%, and blast-furnace smelting coke ratio is 2.9t/t
iron, slag iron is than being 6.1t/t
iron, the addition of fluorite is 110kg/t
iron; And blast-furnace smelting slag system quaternary basicity (CaO+MgO)/(Al in example 2
2o
3+ SiO
2) be 0.98, agglomerate dual alkalinity CaO/SiO
2be 0.6, the yield rate 78wt% of agglomerate in embodiment 2, barrate strength is 67wt%, and blast-furnace smelting coke ratio is 2.0t/t
iron, slag iron is than being 4.4t/t
iron, the addition of fluorite is 20kg/t
iron; This shows, along with the raising of blast-furnace smelting slag system quaternary basicity, agglomerate dual alkalinity, yield rate and the barrate strength of agglomerate all significantly improve, blast-furnace smelting coke ratio and slag iron ratio decline to a great extent simultaneously, and under 1450-1550 DEG C of condition, slag system has good mobility, slags tap smoothly; Significantly can reduce the usage quantity of fluorite simultaneously, extend the work-ing life of blast furnace.
Claims (10)
1. utilize red soil nickel ore to produce a method for nickel-containing molten iron, wherein, the method comprises the following steps: carried out sintering and blast-furnace smelting by red soil nickel ore, obtain nickel-containing molten iron;
The dual alkalinity of described agglomerate is 0.5-1;
In the gross weight of described blast-furnace smelting slag system for 100%, described blast-furnace smelting slag system comprises the SiO of CaO, 35-50wt% of 20-35wt%
2, 14-25wt% the Al of MgO and 2-20wt%
2o
3;
The iron of preferred described red soil nickel ore, nickel mass ratio are 22-5;
Also the quaternary basicity of preferred described blast-furnace smelting slag system is 0.8-1.2.
2. method according to claim 1, wherein, when producing the nickel-containing molten iron of 4-6wt%, described red soil nickel ore is selected from the combination of transition stratotype red soil nickel ore and/or limonite type red soil nickel ore, serpentine type red soil nickel ore and limonite type red soil nickel ore or the combination of limonite type red soil nickel ore, transition stratotype red soil nickel ore and serpentine type red soil nickel ore;
Preferably, in the gross weight of described red soil nickel ore for 100%, described red soil nickel ore comprises the limonite type red soil nickel ore of 0-35wt% and the transition stratotype red soil nickel ore of 65-100wt%.
3. method according to claim 1, wherein, when producing the nickel-containing molten iron of 6-10wt%, described red soil nickel ore is selected from the combination of serpentine type red soil nickel ore and/or transition stratotype red soil nickel ore, serpentine type red soil nickel ore and limonite type red soil nickel ore or the combination of limonite type red soil nickel ore, transition stratotype red soil nickel ore and serpentine type red soil nickel ore;
Preferably, in the gross weight of described red soil nickel ore for 100%, described red soil nickel ore comprises the transition stratotype red soil nickel ore of 0-65wt% and the serpentine type red soil nickel ore of 35-100wt%.
4., according to the method in claim 2 or 3, wherein, in the gross weight of described red soil nickel ore for 100%, described red soil nickel ore comprises the limonite type red soil nickel ore of 0-55wt% and the serpentine type red soil nickel ore of 45-100wt%.
5. according to the method in claim 2 or 3, wherein, in the gross weight of described red soil nickel ore for 100%, described red soil nickel ore comprises the serpentine type red soil nickel ore of the limonite type red soil nickel ore of 10-50wt%, the transition stratotype red soil nickel ore of 5-40wt% and 20-85wt%.
6. method according to claim 1, wherein, when producing the nickel-containing molten iron of 10-15wt%, described red soil nickel ore is serpentine type red soil nickel ore.
7. method according to claim 1, wherein, the sintering negative pressure of described sintering is 8000-14000Pa.
8. the method according to any one of claim 1-7, wherein, the method comprises the following steps: described red soil nickel ore through screening, broken, dehydration, batching, mixing, granulate, after cloth, sintering carried out to it and obtains agglomerate;
By described agglomerate through cooling, screening, obtains finished product agglomerate, then carries out blast-furnace smelting to finished product agglomerate, obtain nickel-containing molten iron;
Preferred described red soil nickel ore obtains the red soil nickel ore that grade is-50mm after screening, fragmentation;
Also preferred described red soil nickel ore is after dehydration, and its water content is 20-30wt%;
Also preferred described mixing is carried out according to following steps: by red soil nickel ore, flux, the fuel after dehydration and mixing of returning mine, obtain compound;
Also preferred described flux comprises unslaked lime or Wingdale, and described fuel comprises coke powder or coal dust;
The particle diameter of the grain group obtained after also preferably granulating is 1-8mm;
Also preferred after cloth, the thickness of the bed of material is 500-1200mm; Be more preferably 700-1000mm;
Also preferred described agglomerate is cooled to less than 150 DEG C;
Also the grade of preferred described finished product agglomerate is+5mm.
9. method according to claim 8, wherein, described red soil nickel ore is after cloth, and the water content of described compound is 18-30wt%, is preferably 20-25wt%.
10. method according to claim 1, wherein, before sintering, mixes described red soil nickel ore and flux, fuel and returning mine, obtains compound;
In the gross weight of this compound for 100%, fixed carbon is 8-16wt%, returns mine as 20-30wt%;
Preferred described fixed carbon is 8-12wt%, returns mine as 25wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510368572.XA CN104946832B (en) | 2015-06-29 | 2015-06-29 | A kind of method that utilization lateritic nickel ore produces nickel-containing molten iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510368572.XA CN104946832B (en) | 2015-06-29 | 2015-06-29 | A kind of method that utilization lateritic nickel ore produces nickel-containing molten iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104946832A true CN104946832A (en) | 2015-09-30 |
| CN104946832B CN104946832B (en) | 2017-07-28 |
Family
ID=54161894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510368572.XA Active CN104946832B (en) | 2015-06-29 | 2015-06-29 | A kind of method that utilization lateritic nickel ore produces nickel-containing molten iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104946832B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106676261A (en) * | 2017-01-23 | 2017-05-17 | 宝钢德盛不锈钢有限公司 | Efficient uniform mixing process for laterite nickel ore |
| CN108277364A (en) * | 2018-01-11 | 2018-07-13 | 中南大学 | The method of various factors coupling cooperative reinforcing lateritic nickel ore sintering |
| CN110527783A (en) * | 2019-10-14 | 2019-12-03 | 江苏江南铁合金有限公司 | A kind of technique improving the nickel recovery rate in ferronickel production |
| CN111286611A (en) * | 2020-03-27 | 2020-06-16 | 中南大学 | Method for smelting chromium-nickel-containing iron and nickel from laterite-nickel ore |
| CN111663034A (en) * | 2020-06-28 | 2020-09-15 | 宝钢德盛不锈钢有限公司 | Low-cost blast furnace molten iron production process |
| CN115354214A (en) * | 2022-09-30 | 2022-11-18 | 日照钢铁控股集团有限公司 | Method for producing weathering steel with low energy consumption, low carbon emission and low cost |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101020943A (en) * | 2006-07-12 | 2007-08-22 | 刘光火 | Phosphorus reducing method for process of smelting Ni-Cr pig iron with nickel oxide ore |
| CN101082067A (en) * | 2007-07-05 | 2007-12-05 | 中南大学 | Comprehensive utilization technique for low-grade laterite nickel ore |
| CN101353710A (en) * | 2008-09-11 | 2009-01-28 | 张家港浦项不锈钢有限公司 | Nickel iron blast furnace smelting process with nickel oxide ore as raw material |
| CN101603140A (en) * | 2009-07-25 | 2009-12-16 | 山西太钢不锈钢股份有限公司 | Method with the laterite ore smelting nickel-containing molten iron |
| CN104152676A (en) * | 2014-07-25 | 2014-11-19 | 中南大学 | Method for sintering and blending nickel laterite ore |
-
2015
- 2015-06-29 CN CN201510368572.XA patent/CN104946832B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101020943A (en) * | 2006-07-12 | 2007-08-22 | 刘光火 | Phosphorus reducing method for process of smelting Ni-Cr pig iron with nickel oxide ore |
| CN101082067A (en) * | 2007-07-05 | 2007-12-05 | 中南大学 | Comprehensive utilization technique for low-grade laterite nickel ore |
| CN101353710A (en) * | 2008-09-11 | 2009-01-28 | 张家港浦项不锈钢有限公司 | Nickel iron blast furnace smelting process with nickel oxide ore as raw material |
| CN101603140A (en) * | 2009-07-25 | 2009-12-16 | 山西太钢不锈钢股份有限公司 | Method with the laterite ore smelting nickel-containing molten iron |
| CN104152676A (en) * | 2014-07-25 | 2014-11-19 | 中南大学 | Method for sintering and blending nickel laterite ore |
Non-Patent Citations (3)
| Title |
|---|
| 刘光火: "《镍铬生铁技术创新及其应用》", 30 November 2008, 上海科学普及出版社 * |
| 张友平: "红土矿高炉冶炼含镍铁水的技术经济分析", 《铁合金》 * |
| 郭培民等: "高炉冶炼红土矿生产镍铁合金关键技术分析与发展方向", 《有色金属（冶炼部分）》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106676261A (en) * | 2017-01-23 | 2017-05-17 | 宝钢德盛不锈钢有限公司 | Efficient uniform mixing process for laterite nickel ore |
| CN108277364A (en) * | 2018-01-11 | 2018-07-13 | 中南大学 | The method of various factors coupling cooperative reinforcing lateritic nickel ore sintering |
| CN108277364B (en) * | 2018-01-11 | 2019-12-06 | 中南大学 | Method for strengthening laterite-nickel ore sintering by multi-factor coupling synergy |
| CN110527783A (en) * | 2019-10-14 | 2019-12-03 | 江苏江南铁合金有限公司 | A kind of technique improving the nickel recovery rate in ferronickel production |
| CN110527783B (en) * | 2019-10-14 | 2021-05-28 | 江苏江南铁合金有限公司 | Process for improving nickel yield in nickel iron production |
| CN111286611A (en) * | 2020-03-27 | 2020-06-16 | 中南大学 | Method for smelting chromium-nickel-containing iron and nickel from laterite-nickel ore |
| CN111663034A (en) * | 2020-06-28 | 2020-09-15 | 宝钢德盛不锈钢有限公司 | Low-cost blast furnace molten iron production process |
| CN115354214A (en) * | 2022-09-30 | 2022-11-18 | 日照钢铁控股集团有限公司 | Method for producing weathering steel with low energy consumption, low carbon emission and low cost |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104946832B (en) | 2017-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104946832A (en) | Method for producing nickel-contained molten iron by using laterite nickel ore | |
| CN100507013C (en) | Method for directly producing ferrochromium from chrome ore powder and coal | |
| AU2005299184B2 (en) | A smelting process of ferronickel with nickel oxide ore containing of crystal water in a blast furnace | |
| EP1927667B1 (en) | A smelting process of ferronickel with nickel oxide ore free of crystal water in a blast furnace | |
| CN100529120C (en) | Sintering method for high-chromic vanadium-titanium ferroferrite | |
| CN107312899B (en) | A kind of blast furnace smelting method of the high vanadium v-ti magnetite concentrate containing chromium type of high-grade | |
| CN102168156B (en) | Iron and aluminum melting separation method for complicated and hard-dressing aluminum and iron intergrowth ore | |
| CN105431557A (en) | Fluxing agent, process of its production, agglomeration mixture and use of slug from secondary metallurgy | |
| CN110106347B (en) | Treatment method for applying copper smelting waste residues to sintering | |
| CN110295261A (en) | A kind of smelting process of high manganese hot metal in steelmaking | |
| CN103866076B (en) | A kind of compact type production method of austenitic stainless steel | |
| CN104561530A (en) | Medium-titanium high-strength sintered ore and preparation method thereof | |
| CN106755653A (en) | A kind of method containing rare earth or the also original production of niobium slag metallurgy melting | |
| CN106755658A (en) | A kind of method of the metallurgical also original production of titanium-containing slag | |
| CN108220623B (en) | Method for reducing energy consumption of RKEF process ferronickel production | |
| CN101660064B (en) | Technique for preparing nickel-iron alloy | |
| CN110655942A (en) | Method for preparing high-reactivity coke by adding steel slag to participate in coking process of coal | |
| CN101358291A (en) | Feedstock for preparing low nickel matte | |
| CN106148679A (en) | A kind of Application way of the lean josephinite of high aluminium profiles | |
| CN105821281B (en) | A kind of direct steelmaking metal of alloying oxide core-spun yarn and preparation method thereof | |
| CN107828930A (en) | A kind of high phosphorus high ferro difficulty selects the method that the deferrization of manganese ore dephosphorization produces ultrapure Mn-rich slag | |
| CN106755659A (en) | A kind of method that the slag of mixing containing rare earth metallurgy melting reduction is reclaimed | |
| CN103421925A (en) | Method of preparing titanium dichloride slag | |
| CN113957185B (en) | Furnace charge formula for smelting vanadium-titanium magnetite in blast furnace | |
| CN111154934A (en) | Furnace burden structure ratio for adjusting blast furnace slag MgO |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |