CN105695773B - A kind of molten point of method for producing dilval of the step of natural gas two reduction lateritic nickel ore electric furnace - Google Patents
A kind of molten point of method for producing dilval of the step of natural gas two reduction lateritic nickel ore electric furnace Download PDFInfo
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- CN105695773B CN105695773B CN201610042378.7A CN201610042378A CN105695773B CN 105695773 B CN105695773 B CN 105695773B CN 201610042378 A CN201610042378 A CN 201610042378A CN 105695773 B CN105695773 B CN 105695773B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/023—Alloys based on nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/02—Obtaining nickel or cobalt by dry processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
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Abstract
The present invention relates to a kind of molten point of method for producing dilval of step of natural gas two reduction lateritic nickel ore electric furnace, belong to non-ferrous metallurgy technology field.Molten point of method for producing dilval of the step of natural gas two reduction lateritic nickel ore electric furnace, lateritic nickel ore is crushed, then pass to natural gas and carry out the first step in first closed reduction furnace as reducing agent and reduce to obtain reduzate and reproducibility tail gas, reduzate and reproducibility tail gas are added into progress second step in second closed reduction furnace to reduce to obtain reduzate and tail gas, tail gas is returned in second closed reduction furnace, reduzate gets dilval and slag through electric furnace is molten, above-mentioned whole production process is continuity process, thermal loss is smaller, energy utilization rate is high.This method is reduced using two step closed reduction furnaces and combined with the molten split-phase of electric furnace, is handled lateritic nickel ore by the use of natural gas as reducing agent, is realized the efficient of lateritic nickel ore production process and cleaning.
Description
Technical field
The present invention relates to a kind of molten point of method for producing dilval of step of natural gas two reduction lateritic nickel ore-electric furnace, belong to
Non-ferrous metallurgy technology field.
Background technology
Nickel has the performances such as good plasticity, corrosion resistance and magnetic, thus be primarily used to steel, nickel-base alloy,
The field such as plating and battery, is widely used in the various military industrial manufacturing enterprises such as aircraft, radar, civilian machinery manufacturing industry and electroplating industry
Deng.The primary nickel minerals in the whole world 2/3 is all used for the production of stainless steel, and stainless steel accounts for 61% in the consumption structure of nickel in world wide, in
State's stainless steel has accounted for the 84% of aggregate consumption with nickel.With the fast development of social industry, the consumption of nickel is continuously increased, contained
The higher nickel sulfide ore of nickel grade also increasingly depleted, effective exploitation and is paid attention to using lateritic nickel ore by more and more national.
Lateritic nickel ore is different according to the composition of its mineral and has different handling process.Limonite layer positioned at mineral deposit top
With the transition zone at middle part, iron content is higher, and content of magnesium is relatively low, is adapted to handle using wet processing, stove caused by smelting ferronickel
Slag is used for the production of steel.Garnierite positioned at lateritic nickel ore mineral deposit bottom, siliceous and magnesium is higher, and iron-holder is relatively low, such
Ore is adapted to handle using fire metallurgy process, and clinker caused by production ferronickel can be used as construction material and production chemical fertilizer.
The various types of mineral features of utilization power and lateritic nickel ore for above-mentioned nickel resources, domestic and foreign scholars are based on
The method that the ferronickel technique of thermal process discloses various different process processing lateritic nickel ores, but because of its high energy consumption so that production
Cost is higher, and caused tail gas is not fully utilized, and thermal loss is more serious, environment also result in certain
Influence.
The content of the invention
For the above-mentioned problems of the prior art and deficiency, the present invention provides a kind of step of natural gas two reduction laterite nickel
Molten point of method for producing dilval of ore deposit-electric furnace.This method is reduced using two step closed reduction furnaces and combined with the molten split-phase of electric furnace,
Lateritic nickel ore is handled by the use of natural gas as reducing agent, the efficient of lateritic nickel ore production process and cleaning is realized, is industrialized production
Dilval provides a kind of brand-new method, and the present invention is achieved through the following technical solutions.
A kind of molten point of method for producing dilval of the step of natural gas two reduction lateritic nickel ore-electric furnace, lateritic nickel ore is crushed,
Then pass to natural gas and carry out the first step in first closed reduction furnace as reducing agent and reduce to obtain reduzate and reduction
Property tail gas, reduzate and reproducibility tail gas are added in second closed reduction furnace and carries out second step and reduces and also originated in
Thing and tail gas, tail gas are returned in second closed reduction furnace, and reduzate gets dilval and slag through electric furnace is molten, on
It is continuity process to state whole production process, and thermal loss is smaller, energy utilization rate is high.
Comprise the following steps that：
（1）It is 2~5mm that lateritic nickel ore is crushed into granularity first, is then added in first closed reduction furnace, with
30~100L/h of flow natural gases are reducing agent, and in reduction temperature, 800 ~ 1000 DEG C carry out the first step 30~60min of reduction, obtain
Reduzate and reproducibility tail gas；
（2）By step（1）Obtained reduzate and temperature be 400 ~ 500 DEG C of reproducibility tail gas be added to second it is closed
In formula reduction furnace, reduce 30~60min in 800 ~ 1000 DEG C of progress second steps of reduction temperature and obtain reduzate and tail gas；
（3）By step（2）Obtained reduzate is placed in electric furnace, is melted under the conditions of being 1400~1500 DEG C in temperature and is divided 3
~5h obtains dilval and slag, step（2）Obtained tail gas return to step（2）As being passed through reducibility gas；
（4）Above-mentioned steps（1）Extremely（3）For continuity process, work as step（2）In reduzate enter step（3）In
After electric furnace, step（1）Obtained reduzate and reproducibility tail gas enters step（2）, will into second closed reduction furnace
Heat transfer gives next link, and thermal loss is smaller, energy utilization rate is high.
The step（3）In can also add CaO flux, addition is step（2）The 5 of obtained reduzate quality~
15%。
Above-mentioned steps（2）H in obtained reproducibility tail gas2The 80~90% of reproducibility tail gas integral molar quantity are accounted for CO contents,
H2Content accounts for the 70~80% of reproducibility tail gas integral molar quantity.
Above-mentioned steps（3）Tail gas（Temperature is 500~600 DEG C）Middle H2The 30~40% of tail gas integral molar quantity are accounted for CO contents,
H2Content accounts for the 20~30% of reproducibility tail gas integral molar quantity.
Nickeliferous 10~15wt%, 80~90wt% of iron content in the dilval being prepared, nickel, the rate of recovery of iron reach 95%
With more than 85%.
The beneficial effects of the invention are as follows：
（1）The step of natural gas two reduces lateritic nickel ore, it is possible to achieve continuous production, reduces thermal loss, reduces smelting
The energy consumption of process, realize the efficient utilization of the energy；
（2）Reducing agent is used as by the use of natural gas, it is possible to achieve circulation of tail gas utilizes, and valuable metal reduction effect is good, production
Efficiency high；
（3）The method that molten point of the step reduction of natural gas two-electric furnace, improves nickel grade in dilval, promotes nickel, iron
Synthetical recovery, the perfect smelting process of lateritic nickel ore.
Brief description of the drawings
Fig. 1 is present invention process flow chart.
Embodiment
With reference to the accompanying drawings and detailed description, the invention will be further described.
Embodiment 1
As shown in figure 1, molten point of method for producing dilval of the step of natural gas two reduction lateritic nickel ore-electric furnace, by laterite
Nickel minerals crushes, and then passes to natural gas and carries out the first step in first closed reduction furnace as reducing agent and is reduced
Thing and reproducibility tail gas, reduzate and reproducibility tail gas are added to progress second step in second closed reduction furnace and reduced
To reduzate and tail gas, tail gas is returned in second closed reduction furnace, and reduzate closes through the molten ferronickel of getting of electric furnace
Gold and slag, above-mentioned whole production process is continuity process, and thermal loss is smaller, energy utilization rate is high.
Comprise the following steps that：
（1）First by lateritic nickel ore（Including following mass percent component：Ni0.82%、Fe9.67%、MgO31.49%、
SiO237.37% and Al2O31.89%）It is 2~5mm to be crushed to granularity, is then added in first closed reduction furnace, with stream
It is reducing agent to measure 30L/h natural gases, and in reduction temperature, 900 DEG C carry out first step reduction 30min, obtain reduzate and reproducibility tail
Gas；
（2）By step（1）Obtained reduzate and temperature is that 400 DEG C of reproducibility tail gas is added to second closed also
In former stove, reduzate and tail gas are obtained in 900 DEG C of progress second step reduction 30min of reduction temperature；
（3）By step（2）Obtained reduzate is placed in electric furnace, is melted under the conditions of being 1400 DEG C in temperature and is divided 3h to obtain nickel
Ferroalloy and slag, step（2）Obtained tail gas return to step（2）As being passed through reducibility gas；
（4）Above-mentioned steps（1）Extremely（3）For continuity process, work as step（2）In reduzate enter step（3）In
After electric furnace, step（1）Obtained reduzate and reproducibility tail gas enters step（2）, will into second closed reduction furnace
Heat transfer gives next link, and thermal loss is smaller, energy utilization rate is high.
Nickeliferous 11.5wt%, iron content 82.2wt% in the dilval that the present embodiment is prepared, nickel, the rate of recovery difference of iron
For 95.4% and 85.2%.
Embodiment 2
As shown in figure 1, molten point of method for producing dilval of the step of natural gas two reduction lateritic nickel ore-electric furnace, by laterite
Nickel minerals crushes, and then passes to natural gas and carries out the first step in first closed reduction furnace as reducing agent and is reduced
Thing and reproducibility tail gas, reduzate and reproducibility tail gas are added to progress second step in second closed reduction furnace and reduced
To reduzate and tail gas, tail gas is returned in second closed reduction furnace, and reduzate closes through the molten ferronickel of getting of electric furnace
Gold and slag, above-mentioned whole production process is continuity process, and thermal loss is smaller, energy utilization rate is high.
Comprise the following steps that：
（1）First by lateritic nickel ore（Including following mass percent component：Ni1.17%, TFe35.71%, MgO4.54%,
SiO216.75% and Al2O311.17%）It is 2~5mm to be crushed to granularity, is then added in first closed reduction furnace, with stream
It is reducing agent to measure 50L/h natural gases, and in reduction temperature, 1000 DEG C carry out first step reduction 45min, obtain reduzate and reproducibility
Tail gas；
（2）By step（1）Obtained reduzate and temperature is that 500 DEG C of reproducibility tail gas is added to second closed also
In former stove, reduzate and tail gas are obtained in 1000 DEG C of progress second step reduction 45min of reduction temperature；
（3）By step（2）Obtained reduzate is placed in electric furnace, is melted under the conditions of being 1450 DEG C in temperature and is divided 4h to obtain nickel
Ferroalloy and slag, step（2）Obtained tail gas return to step（2）As being passed through reducibility gas；
（4）Above-mentioned steps（1）Extremely（3）For continuity process, work as step（2）In reduzate enter step（3）In
After electric furnace, step（1）Obtained reduzate and reproducibility tail gas enters step（2）, will into second closed reduction furnace
Heat transfer gives next link, and thermal loss is smaller, energy utilization rate is high.
Nickeliferous 13.2wt%, iron content 85.3wt% in the dilval that the present embodiment is prepared, nickel, the rate of recovery difference of iron
For 96.8% and 88.9%.
Embodiment 3
As shown in figure 1, molten point of method for producing dilval of the step of natural gas two reduction lateritic nickel ore-electric furnace, by laterite
Nickel minerals crushes, and then passes to natural gas and carries out the first step in first closed reduction furnace as reducing agent and is reduced
Thing and reproducibility tail gas, reduzate and reproducibility tail gas are added to progress second step in second closed reduction furnace and reduced
To reduzate and tail gas, tail gas is returned in second closed reduction furnace, and reduzate closes through the molten ferronickel of getting of electric furnace
Gold and slag, above-mentioned whole production process is continuity process, and thermal loss is smaller, energy utilization rate is high.
Comprise the following steps that：
（1）First by lateritic nickel ore（Including following mass percent component：Ni1.09%, TFe9.12%, MgO29.08%,
SiO236.48% and Al2O32.47%）It is 2~5mm to be crushed to granularity, is then added in first closed reduction furnace, with stream
It is reducing agent to measure 100L/h natural gases, and in reduction temperature, 800 DEG C carry out first step reduction 60min, obtain reduzate and reproducibility
Tail gas；
（2）By step（1）Obtained reduzate and temperature is that 450 DEG C of reproducibility tail gas is added to second closed also
In former stove, reduzate and tail gas are obtained in 800 DEG C of progress second step reduction 60min of reduction temperature；
（3）By step（2）Obtained reduzate is placed in electric furnace, is melted under the conditions of being 1500 DEG C in temperature and is divided 5h to obtain nickel
Ferroalloy and slag, step（2）Obtained tail gas return to step（2）As being passed through reducibility gas；
（4）Above-mentioned steps（1）Extremely（3）For continuity process, work as step（2）In reduzate enter step（3）In
After electric furnace, step（1）Obtained reduzate and reproducibility tail gas enters step（2）, will into second closed reduction furnace
Heat transfer gives next link, and thermal loss is smaller, energy utilization rate is high.
Nickeliferous 13.8wt%, iron content 84.9wt% in the dilval that the present embodiment is prepared, nickel, the rate of recovery difference of iron
For 97.2% and 88.3%.
Embodiment 4
Other parameters are set with embodiment 1 unanimously, only in step（3）During be also added into another material, the material
For 5% CaO flux of reduzate quality.
Embodiment 5
Other parameters are set with embodiment 1 unanimously, only in step（3）During be also added into another material, the material
For 15% CaO flux of reduzate quality.
Embodiment 6
Other parameters are set with embodiment 1 unanimously, only in step（3）During be also added into another material, the material
For 10% CaO flux of reduzate quality.
Above in association with accompanying drawing to the present invention embodiment be explained in detail, but the present invention be not limited to it is above-mentioned
Embodiment, can also be before present inventive concept not be departed from those of ordinary skill in the art's possessed knowledge
Put that various changes can be made.
Claims (2)
- A kind of 1. molten point of method for producing dilval of the step of natural gas two reduction lateritic nickel ore-electric furnace, it is characterised in that：By laterite Nickel minerals crushes, and then passes to natural gas and carries out the first step in first closed reduction furnace as reducing agent and is reduced Thing and reproducibility tail gas, reduzate and reproducibility tail gas are added to progress second step in second closed reduction furnace and reduced To reduzate and tail gas, tail gas is returned in second closed reduction furnace, and reduzate closes through the molten ferronickel of getting of electric furnace Gold and slag, above-mentioned whole production process is continuity process；It is comprised the following steps that：（1）It is 2~5mm that lateritic nickel ore is crushed into granularity first, is then added in first closed reduction furnace, with flow 30~100L/h natural gases are reducing agent, and in reduction temperature, 800 ~ 1000 DEG C carry out the first step 30~60min of reduction, are reduced Thing and reproducibility tail gas；（2）By step（1）Obtained reduzate and temperature is that 400 ~ 500 DEG C of reproducibility tail gas is added to second closed also In former stove, reduce 30~60min in 800 ~ 1000 DEG C of progress second steps of reduction temperature and obtain reduzate and tail gas；（3）By step（2）Obtained reduzate is placed in electric furnace, melts a point 3~5h under the conditions of being 1400~1500 DEG C in temperature Obtain dilval and slag, step（2）Obtained tail gas return to step（2）As being passed through reducibility gas；（4）Above-mentioned steps（1）Extremely（3）For continuity process.
- 2. molten point of method for producing dilval of the step of natural gas two reduction lateritic nickel ore-electric furnace according to claim 1, its It is characterised by：The step（3）In can also add CaO flux, addition is step（2）The 5 of obtained reduzate quality~ 15%。
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| CN102643997B (en) * | 2012-04-09 | 2015-07-01 | 北京神雾环境能源科技集团股份有限公司 | Laterite-nickel ore processing method for efficiently recovering nickel resources |
| CN103643034A (en) * | 2013-12-12 | 2014-03-19 | 毛黎生 | Method for reducing granular ferronickel through laterite-nickel ore in two-stage rotary kiln |
| CN104531933B (en) * | 2014-12-26 | 2017-01-18 | 北京神雾环境能源科技集团股份有限公司 | Method for producing high-quality nickel-iron alloy by reducing laterite-nickel ore under control |
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