CN110819791A - Production process of nickel-containing molten iron with low iron distribution and low silicon-magnesium ratio for submerged arc furnace - Google Patents
Production process of nickel-containing molten iron with low iron distribution and low silicon-magnesium ratio for submerged arc furnace Download PDFInfo
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- CN110819791A CN110819791A CN201911317472.9A CN201911317472A CN110819791A CN 110819791 A CN110819791 A CN 110819791A CN 201911317472 A CN201911317472 A CN 201911317472A CN 110819791 A CN110819791 A CN 110819791A
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 118
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 74
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 38
- 238000009826 distribution Methods 0.000 title claims abstract description 19
- MKPXGEVFQSIKGE-UHFFFAOYSA-N [Mg].[Si] Chemical compound [Mg].[Si] MKPXGEVFQSIKGE-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 238000003723 Smelting Methods 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 13
- 230000009467 reduction Effects 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 12
- 239000011777 magnesium Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000012216 screening Methods 0.000 claims abstract description 6
- 239000000571 coke Substances 0.000 claims description 13
- 239000003245 coal Substances 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 5
- 239000003546 flue gas Substances 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 5
- 229910001710 laterite Inorganic materials 0.000 claims description 5
- 239000011504 laterite Substances 0.000 claims description 5
- 238000011112 process operation Methods 0.000 claims description 5
- 238000005245 sintering Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 239000002918 waste heat Substances 0.000 claims description 5
- 238000010304 firing Methods 0.000 claims description 3
- 239000011819 refractory material Substances 0.000 abstract description 15
- 239000000779 smoke Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000012774 insulation material Substances 0.000 abstract 1
- 239000004576 sand Substances 0.000 abstract 1
- 239000002893 slag Substances 0.000 description 9
- 210000003128 head Anatomy 0.000 description 8
- 229910000863 Ferronickel Inorganic materials 0.000 description 3
- 238000007363 ring formation reaction Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- DYRBFMPPJATHRF-UHFFFAOYSA-N chromium silicon Chemical compound [Si].[Cr] DYRBFMPPJATHRF-UHFFFAOYSA-N 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- 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
- C22B23/005—Preliminary treatment of ores, e.g. by roasting or by the Krupp-Renn process
-
- 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
- C22B23/023—Obtaining nickel or cobalt by dry processes with formation of ferro-nickel or ferro-cobalt
-
- 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
- C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
- C22B4/06—Alloys
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacture Of Iron (AREA)
Abstract
The invention provides a process for producing nickel-containing molten iron with low iron distribution and low silicon-magnesium ratio in a submerged arc furnace, which belongs to the technical field of smelting of the submerged arc furnace and comprises the following steps: 1) carrying out wet field stacking on the laterite-nickel ore, taking materials, crushing and screening, and conveying to a drying kiln; 2) drying the wet ore; 3) conveying the laterite-nickel ore to a batching plant, and preparing furnace burden according to the Ni grade of 1.6-1.8, the TFe of 18.0-20.75%, the weight ratio of Si to Mg of 1.53-1.69 and the alkalinity of 0.61-0.66; 4) roasting and pre-reducing the prepared furnace burden through a rotary kiln to obtain red hot roasted sand; 5) and (3) loading the red hot calcine into a heat insulation material tank, and transferring the red hot calcine into a submerged arc furnace for reduction smelting to obtain nickel-containing molten iron. The production process of the nickel-containing molten iron can obviously reduce the production cost, prolong the service life of refractory materials and improve the operating rate of the rotary kiln, solve the environmental protection problem of furnace cover fire blow-by and smoke generation, obviously reduce the probability of furnace cover collapse accidents and realize the continuous and efficient operation of the submerged arc furnace.
Description
Technical Field
The invention relates to the technical field of smelting of submerged arc furnaces, in particular to a smelting process of nickel-containing molten iron of a submerged arc furnace.
Background
In recent years, the price of nickel enters a drop-down passage under the influence of global economy, but the prices of raw materials such as coke and coal are still high, and in order to realize the optimization of cost and the maximization of capacity, the submerged arc furnace smelting needs to further innovate a process, control the production cost and improve the capacity, so that the development situation can be reached.
In the production process of a nickel-iron plant, the service life of the refractory materials of a plurality of submerged arc furnaces exceeds 6 years, the phenomena of great reduction of the depth of iron eyes, great increase of the temperature difference before and after tapping and obvious rise of the temperature difference of the water of the four-level water jacket occur in the furnaces, and the refractory materials are seriously deteriorated. If the prior production process is continued, the maintenance of the submerged arc furnace is obviously not facilitated, the abrasion of refractory materials is only more serious, and the service life is shorter; the working condition of the refractory material of the rotary kiln is gradually worsened after being used for more than 6 years, the ring formation in the kiln is more and more serious, and the operation rate is low, so that the difficulty is increased for the later use and maintenance of the refractory material, the production cost is increased, the smelting capacity and quality of a ferronickel factory are restricted, the refractory material is directly scrapped and is not used any more, and the waste is caused.
In addition, in the production process of the furnace, the furnace cover is easy to blow fire and smoke, which causes great trouble to the cleanness of the production environment, is not beneficial to the health of surrounding workers and is not environment-friendly; and the temperature of the furnace cover is over-high, so that the failure of collapse of a refractory material of the furnace cover is easy to occur, the risks of deformation, cracking and the like of a girder of the furnace cover are easy to cause, the personal safety of operating personnel is threatened, and the nervous production operation is delayed.
Therefore, in order to solve the problems of high production cost, deteriorated furnace life, environmental protection, safe operation, frequent production failures and the like in the prior art, a production process for protecting the furnace, prolonging the service life of refractory materials, fully controlling the cost of nickel alloy and improving the productivity is urgently needed in the smelting of the ore heating furnace of the nickel-iron plant.
Disclosure of Invention
Aiming at the defects and the defects in the background technology, the invention provides the process for producing the nickel-containing molten iron with low iron distribution and low silicon-magnesium ratio for the submerged arc furnace, which can reduce the production cost, prolong the service life of refractory materials, improve the operation rate of the whole rotary kiln, realize the maximum productivity of the rotary kiln, solve the environmental protection problem of fire blow-by and smoke generation, greatly reduce the probability of furnace cover collapse accidents and realize the continuous and efficient operation of the submerged arc furnace.
In order to realize the purpose, the invention adopts the following technical scheme to realize the purpose:
a production process of molten iron containing nickel with low iron distribution and low silicon-magnesium ratio for a submerged arc furnace comprises the following steps:
1) stacking the laterite-nickel ore in a wet field, conveying the laterite-nickel ore to a factory, taking the laterite-nickel ore by a loader, crushing and screening the laterite-nickel ore, and quantitatively conveying the laterite-nickel ore to a drying kiln;
2) drying wet ore by using the flue gas waste heat of the rotary kiln and the submerged arc furnace, and controlling the moisture within the range of 20-27%;
3) piling and taking the laterite-nickel ore after the step 2) by a piling and taking machine, and sending the laterite-nickel ore to a batching plant, and preparing furnace burden by using the laterite-nickel ore dry ores with different grades, coke breeze and coal powder according to the Ni grade of 1.6-1.8, the TFe of 18.0-20.75%, the weight ratio of Si to Mg of 1.53-1.69 and the alkalinity of 0.61-0.66;
4) feeding laterite nickel ore and nut coke in the furnace burden prepared in the step 3) from the tail part of the rotary kiln, spraying coal powder in the furnace burden from the head part of the rotary kiln through the head part of the rotary kiln, and roasting and pre-reducing to obtain red hot calcine;
5) and (3) filling the red hot calcine into a heat-insulating material tank, transferring the red hot calcine into a submerged arc furnace for reduction smelting, heating and smelting by using an electrode, and controlling the sintering temperature to be between 700 and 800 ℃ according to the melting point and the production process of furnace burden to obtain the nickel-containing molten iron.
Further measures taken are: in the step 2), the moisture is controlled within the range of 20-24%.
Further measures taken are: in the step 2), the moisture is controlled within the range of 21-22%.
Further measures taken are: in the step 3), the Ni grade is 1.6-1.7, the TFe is 18.2-18.8%, and the weight ratio of Si to Mg is 1.58-1.63.
Further measures taken are: in the step 3), the Ni grade is 1.6, the TFe is 18.5 percent, and the weight ratio of Si to Mg is 1.6.
Further measures taken are: in the step 5), the firing temperature is 730-760 ℃.
Further measures taken are: the process operation level is 12-15 levels, the operation voltage is 480-.
Further measures taken are: the thickness of the material layer in the reduction smelting process is controlled to be 1.0-1.2m, and the clearance of the furnace core is 800-900 mm.
Through the technical scheme, compared with the prior art, the invention has the following beneficial effects:
(1) the production process has the advantages that the iron distribution ratio is low, the problem of 'fire fleeing and smoke generation' of the furnace cover in the production process of the submerged arc furnace is effectively inhibited, the production environment is cleaner and more environment-friendly, the temperature of the furnace cover is reduced from 880 ℃ to 800 ℃, the refractory material of the furnace cover is protected, and the probability of 'collapse' accident of the refractory material of the furnace cover is greatly reduced.
(2) According to the invention, the melting point of furnace burden is controlled by reasonably matching the Ni feeding grade, the TFe content and the low silicon-magnesium ratio and controlling the material layer thickness and the furnace core clearance, so that the potential safety hazard of ring formation of the rotary kiln is effectively controlled, the refractory material of the rotary kiln is protected, and the service life of the refractory material is prolonged.
(3) According to the invention, the working end of the electrode is easy to insert downwards through low iron distribution, the smelting current of the submerged arc furnace is more stable, and the power factor is as high as 0.99, so that the effective power is improved; meanwhile, the firing temperature of the rotary kiln calcine is controlled to be 730-760 ℃, and the conversion of 3-valent iron of the calcine into 2-valent iron is promoted, so that the melting speed of furnace burden is increased, the power consumption is reduced, and the operation efficiency is improved by 7.1%.
(4) By the invention to Fe2O3The reduction of the addition amount leads the usage amount of the coke oven to be reduced, which is about 8.35 percent, and keeps the stability of smelting components of the submerged arc furnace, and stabilizes the FeO of the slag and the temperature of the slag, thereby keeping the stability of the furnace condition.
(5) The process can continuously carry out the slag adhering process on the submerged arc furnace lining, control the slag adhering thickness of the lining, stabilize the depth of the iron eye between 1.1 and 1.5m, keep the temperature difference of the water jacket less than or equal to 3.5 ℃, and realize the continuous, safe and efficient operation of the submerged arc furnace lining.
Detailed Description
In order to clearly understand the technical solutions adopted by the present invention, the following description is made on the preferred embodiments of the present invention, and it should be understood that the embodiments described herein are only used for illustrating and explaining the present invention, and are not used to limit the present invention.
Example 1: a production process of molten iron containing nickel with low iron distribution and low silicon-magnesium ratio for a submerged arc furnace comprises the following steps:
1) stacking the laterite-nickel ore in a wet field, conveying the laterite-nickel ore to a factory, taking the laterite-nickel ore by a loader, crushing and screening the laterite-nickel ore, and quantitatively conveying the laterite-nickel ore to a drying kiln;
2) drying wet ore by using the flue gas waste heat of the rotary kiln and the submerged arc furnace, and controlling the moisture within the range of 21-22%;
3) piling and taking the laterite-nickel ore subjected to the step 2) by a piling and taking machine, conveying the laterite-nickel ore to a batching workshop, and preparing furnace burden by mixing the laterite-nickel ore dry ores with different grades, coke breeze and coal powder according to the Ni grade of 1.6, the TFe of 18.5%, the weight ratio of Si to Mg of 1.6 and the alkalinity of 0.62;
4) feeding laterite nickel ore and nut coke in the furnace burden prepared in the step 3) from the tail part of the rotary kiln, spraying coal powder in the furnace burden from the head part of the rotary kiln through the head part of the rotary kiln, and roasting and pre-reducing to obtain red hot calcine;
5) and (3) filling the red hot calcine into a heat-insulating material tank, transferring the red hot calcine into a submerged arc furnace for reduction smelting, heating and smelting by using an electrode, and controlling the sintering temperature to be between 730 and 760 ℃ according to the melting point and the production process of furnace burden to obtain the nickel-containing molten iron.
In addition, the process operation level is 12-15 levels, the operation voltage is 480-; the thickness of the material layer in the reduction smelting process is controlled to be 1.0-1.2m, and the clearance of the furnace core is 800-900 mm.
Example 2: a production process of molten iron containing nickel with low iron distribution and low silicon-magnesium ratio for a submerged arc furnace comprises the following steps:
1) stacking the laterite-nickel ore in a wet field, conveying the laterite-nickel ore to a factory, taking the laterite-nickel ore by a loader, crushing and screening the laterite-nickel ore, and quantitatively conveying the laterite-nickel ore to a drying kiln;
2) drying wet ore by using the flue gas waste heat of the rotary kiln and the submerged arc furnace, and controlling the moisture within the range of 21-24%;
3) piling and taking the laterite-nickel ore subjected to the step 2) by a piling and taking machine, conveying the laterite-nickel ore to a batching plant, and preparing furnace burden by mixing the laterite-nickel ore dry ores with different grades, coke breeze and coal powder according to the Ni grade of 1.73, the TFe of 18.21%, the weight ratio of Si to Mg of 1.66 and the alkalinity of 0.61;
4) feeding laterite nickel ore and nut coke in the furnace burden prepared in the step 3) from the tail part of the rotary kiln, spraying coal powder in the furnace burden from the head part of the rotary kiln through the head part of the rotary kiln, and roasting and pre-reducing to obtain red hot calcine;
5) and (3) filling the red hot calcine into a heat-insulating material tank, transferring the red hot calcine into a submerged arc furnace for reduction smelting, heating and smelting by using an electrode, and controlling the sintering temperature to be between 700 and 730 ℃ according to the melting point and the production process of furnace burden to obtain the nickel-containing molten iron.
In addition, the process operation level is 12-15 levels, the operation voltage is 480-; the thickness of the material layer in the reduction smelting process is controlled to be 1.0-1.2m, and the clearance of the furnace core is 800-900 mm.
Example 3: a production process of molten iron containing nickel with low iron distribution and low silicon-magnesium ratio for a submerged arc furnace comprises the following steps:
1) stacking the laterite-nickel ore in a wet field, conveying the laterite-nickel ore to a factory, taking the laterite-nickel ore by a loader, crushing and screening the laterite-nickel ore, and quantitatively conveying the laterite-nickel ore to a drying kiln;
2) drying wet ore by using the flue gas waste heat of the rotary kiln and the submerged arc furnace, and controlling the moisture within the range of 25-27%;
3) piling and taking the laterite-nickel ore subjected to the step 2) by a piling and taking machine, conveying the laterite-nickel ore to a batching workshop, and preparing furnace burden by using the laterite-nickel ore dry ores with different grades, coke breeze and coal powder according to the Ni grade of 1.8, the TFe of 20.75%, the weight ratio of Si to Mg of 1.53 and the alkalinity of 0.66;
4) feeding laterite nickel ore and nut coke in the furnace burden prepared in the step 3) from the tail part of the rotary kiln, spraying coal powder in the furnace burden from the head part of the rotary kiln through the head part of the rotary kiln, and roasting and pre-reducing to obtain red hot calcine;
5) and (3) filling the red hot calcine into a heat-insulating material tank, transferring the red hot calcine into a submerged arc furnace for reduction smelting, heating and smelting by using an electrode, and controlling the sintering temperature to be between 760 and 800 ℃ according to the melting point and the production process of furnace burden to obtain the nickel-containing molten iron.
In addition, the process operation level is 12-15 levels, the operation voltage is 480-; the thickness of the material layer in the reduction smelting process is controlled to be 1.0-1.2m, and the clearance of the furnace core is 800-900 mm.
In the operation process of the production process, the following points need to be noted:
e1, reasonably pressing and releasing the electrode to ensure the insertion depth in the smelting process and reduce the current fluctuation;
e2, uniformly discharging slag, and facilitating the stabilization of slag lines, hot melting and current;
e3, stable control of the temperature of the calcine in the former procedure.
The above is the preferred embodiment of the invention, after the ferronickel plant is put into the submerged arc furnace with blast furnace age by using the above embodiment, on the premise that the silicon-magnesium ratio of the slag is 1.53-1.66, the slag temperature is controlled at 1550-; slag adhering of the furnace body is effectively realized, refractory materials of the furnace lining of the submerged arc furnace are effectively ensured, and the depth of iron holes of four submerged arc furnaces tested by a ferronickel plant is completely recovered to 1.1-1.4 meters; meanwhile, the material melting speed of the furnace is effectively improved, and the consumption of 8000t dry ores per day of 4 furnaces is ensured; and because the iron distribution is low, the problem of ring formation in the kiln is reduced, and the safe production is ensured.
By increasing the content of 2-valent iron, the temperature of the furnace charge starting to melt is reduced by 20-30 ℃, and the daily consumption of 2000 tons of dry ore by a single ore-smelting furnace is ensured; the Ni point in the molten iron is increased to 10.5-10.8%, the total nickel point of the submerged arc furnace daily production is increased from 6200 (non-silicon chromium) of 1-4 months to 6600 of 5-7 months and 7500 of 8-12 months, the total energy is effectively improved, the power consumption of the submerged arc furnace nickel smelting point is also reduced from 375 ℃ to 352 ℃, and the consumption of the coke is reduced by 8.35%.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. A production process of nickel-containing molten iron with low iron distribution and low silicon-magnesium ratio for a submerged arc furnace is characterized by comprising the following steps:
1) stacking the laterite-nickel ore in a wet field, conveying the laterite-nickel ore to a factory, taking the laterite-nickel ore by a loader, crushing and screening the laterite-nickel ore, and quantitatively conveying the laterite-nickel ore to a drying kiln;
2) drying wet ore by using the flue gas waste heat of the rotary kiln and the submerged arc furnace, and controlling the moisture within the range of 20-27%;
3) piling and taking the laterite-nickel ore after the step 2) by a piling and taking machine, and sending the laterite-nickel ore to a batching plant, and preparing furnace burden by using the laterite-nickel ore dry ores with different grades, coke breeze and coal powder according to the Ni grade of 1.6-1.8, the TFe of 18.0-20.75%, the weight ratio of Si to Mg of 1.53-1.69 and the alkalinity of 0.61-0.66;
4) feeding laterite nickel ore and nut coke in the furnace burden prepared in the step 3) from the tail part of the rotary kiln, spraying coal powder in the furnace burden from the head part of the rotary kiln through the head part of the rotary kiln, and roasting and pre-reducing to obtain red hot calcine;
5) and (3) filling the red hot calcine into a heat-insulating material tank, transferring the red hot calcine into a submerged arc furnace for reduction smelting, heating and smelting by using an electrode, and controlling the sintering temperature to be between 700 and 800 ℃ according to the melting point and the production process of furnace burden to obtain the nickel-containing molten iron.
2. The production process of nickel-containing molten iron with low iron distribution and low silicon-magnesium ratio for submerged arc furnace as claimed in claim 1, wherein: in the step 2), the moisture is controlled within the range of 20-24%.
3. The production process of nickel-containing molten iron with low iron distribution and low silicon-magnesium ratio for submerged arc furnace as claimed in claim 2, characterized in that: in the step 2), the moisture is controlled within the range of 21-22%.
4. The production process of nickel-containing molten iron with low iron distribution and low silicon-magnesium ratio for submerged arc furnace as claimed in claim 1, wherein: in the step 3), the Ni grade is 1.6-1.7, the TFe is 18.2-18.8%, the weight ratio of Si to Mg is 1.58-1.63, and the alkalinity is 0.61-0.63.
5. The production process of nickel-containing molten iron with low iron distribution and low silicon-magnesium ratio for submerged arc furnace as claimed in claim 4, wherein: in the step 3), the Ni grade is 1.6, the TFe is 18.5 percent, the weight ratio of Si to Mg is 1.6, and the alkalinity is 0.62.
6. The production process of nickel-containing molten iron with low iron distribution and low silicon-magnesium ratio for submerged arc furnace as claimed in claim 1, wherein: in the step 5), the firing temperature is 730-760 ℃.
7. The production process of nickel-containing molten iron with low iron distribution and low silicon-magnesium ratio for submerged arc furnace according to claim 1, characterized in that: the process operation level is 12-15 levels, the operation voltage is 480-.
8. The production process of nickel-containing molten iron with low iron distribution and low silicon-magnesium ratio for submerged arc furnace as claimed in claim 1, wherein: the thickness of the material layer in the reduction smelting process is controlled to be 1.0-1.2m, and the clearance of the furnace core is 800-900 mm.
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| CN201911317472.9A CN110819791A (en) | 2019-12-19 | 2019-12-19 | Production process of nickel-containing molten iron with low iron distribution and low silicon-magnesium ratio for submerged arc furnace |
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| CN201911317472.9A CN110819791A (en) | 2019-12-19 | 2019-12-19 | Production process of nickel-containing molten iron with low iron distribution and low silicon-magnesium ratio for submerged arc furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112080649A (en) * | 2020-08-10 | 2020-12-15 | 广东广青金属科技有限公司 | Process for smelting ferronickel from laterite-nickel ore under high power of submerged arc furnace |
| CN113549807A (en) * | 2021-07-21 | 2021-10-26 | 广东广青金属科技有限公司 | Method for smelting molten nickel iron with low cost and high yield |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102650002A (en) * | 2011-02-25 | 2012-08-29 | 云南锡业集团（控股）有限责任公司 | Improved method for smelting laterite nickel ore to produce nickelferrite or nickel matte |
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| CN108559838A (en) * | 2018-05-10 | 2018-09-21 | 重庆大学 | Method for preparing nickel-iron alloy by mixed smelting of laterite nickel ore |
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| CN105586489A (en) * | 2014-09-30 | 2016-05-18 | 陈芳 | Submerged arc furnace smelting ferronickel production process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112080649A (en) * | 2020-08-10 | 2020-12-15 | 广东广青金属科技有限公司 | Process for smelting ferronickel from laterite-nickel ore under high power of submerged arc furnace |
| CN113549807A (en) * | 2021-07-21 | 2021-10-26 | 广东广青金属科技有限公司 | Method for smelting molten nickel iron with low cost and high yield |
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