CN103421922B - Method for producing ferronickel by processing laterite nickel ore in Sulawesi, Indonesia through RKEF technology - Google Patents
Method for producing ferronickel by processing laterite nickel ore in Sulawesi, Indonesia through RKEF technology Download PDFInfo
- Publication number
- CN103421922B CN103421922B CN201210167023.2A CN201210167023A CN103421922B CN 103421922 B CN103421922 B CN 103421922B CN 201210167023 A CN201210167023 A CN 201210167023A CN 103421922 B CN103421922 B CN 103421922B
- Authority
- CN
- China
- Prior art keywords
- kiln
- coal
- laterite
- reduction
- kiln body
- 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.)
- Expired - Fee Related
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a method for producing ferronickel by processing laterite nickel ore in Sulawesi, Indonesia through an RKEF technology. The method comprises the following steps: 1, prescreening a laterite ore raw material by a 50mm grizzly screen, crushing a part not passing through the screen by a jaw crusher to below 50mm, and mixing the obtained crushed material with a product passing through the screen; 2, sending mixed laterite ore obtained in step 1 to a rotary drying kiln, and drying until the water content reaches 20-22wt% of the total weight of the laterite ore; 3, adding the dried laterite ore and reducing coal to a swirl injection revolving kiln for pre-reduction; 4, putting a reduced roasted product obtained in step 3 to a heat pot, and directly suspending the heat pot in an electric furnace for reduction melting; and 5, trapping flue dusts generated in the above drying, pre-reduction and reduction melting processes by a bag connector, granulating, and returning as a raw ore ingredient.
Description
Technical field
The present invention relates to a kind of method of producing ferronickel, especially, relate to a kind of method being specially adapted to smelting ferronickel from nickel laterite.
Background technology
China smelts with laterite-type nickel ore in the world to produce ferronickel (comprising nickel-contained pig iron) first big country, has the hundreds of smeltery of size.Wherein, smelting process used has the smelting of blast-furnace smelting, local method sintering-electric furnace reduction respectively, sinter machine sintering-electric furnace reduction smelts and rotary kiln drying-rotary kiln reduction-electric furnace reduction smelts (hereinafter referred to as RKEF technique).Four kinds of described methods, can produce the ferro-nickel product of different grade.But first three is planted technique and there is the problem that pollution is heavy, energy consumption is high, level of resource utilization is low all to some extent.
Summary of the invention
Main purpose of the present invention is to provide a kind of method being specially adapted to smelting ferronickel from Indonesia's Sulawesi nickel laterite.
For achieving the above object, the present invention is by the following technical solutions:
RKEF art breading Indonesia Sulawesi nickel laterite produces a method for ferronickel, and its step is as follows:
A. laterite raw material is carried out prescreening through 50mm diagrid, sieve upper part is crushed to after-50mm through jaw crusher and mixes with screen undersize;
B. mixed laterite is delivered to rotary drying kiln and carry out drying, until water content reaches 20 ~ 22wt% of laterite gross weight;
C. dried laterite allocate into reduction coal enter revolution reduction kiln carry out prereduction;
D. the calcining after reduction directly hangs in electric furnace with hot batch can and carries out retailoring;
E. the flue dust produced in drying, prereduction and retailoring process, respectively through bagroom trapping, returns raw ore batching after granulation;
F., after retailoring completes, slag, ferronickel are by slag tap and iron notch is released respectively, and the ferronickel sampling elements such as direct reading spectrometry real-time analysis Ni, Fe, C, Si, P, S, slag sampling chemical method analyzes Ni, Fe, SiO
2, MgO, Al
2o
3, the composition such as CaO.
Method as above, wherein preferably, in described pre-reduction procedure, maturing temperature is at 900 ~ 950 DEG C.
Method as above, wherein preferably, in described pre-reduction procedure, the add-on of reduction coal is the 7wt% of laterite weight.
Method as above, wherein preferably, in described granulation step, allocates wet ore deposit into by the 25wt% of flue dust, the obtained moisture 30wt% of dustball.
Method as above, wherein preferably, described rotary drying kiln comprises:
One kiln body and a support, this support is provided with support roller and supports this kiln body, this support is also provided with the driving and transmission mechanism that this kiln can be made to rotate on support roller;
This kiln body is slant setting, and relatively high upper end, position is provided with opening for feed, and opening for feed connects a spoon formula feeding hopper, and the junction of this feeding hopper and this opening for feed is provided with a smoke-box;
Relatively low lower end, this kiln body position is provided with ferronickel discharge port, and this kiln body lower end also connects a gas blower by a swirl injection coal injection pipe; Be provided with a fine coal storehouse above this coal injection pipe, this lower end, fine coal storehouse is communicated with this coal injection pipe; The outside of this kiln body lower end is also provided with cooling cylinder.
Method as above, wherein preferably, described revolution reduction kiln comprises:
One kiln body and a support, this support is provided with support roller and supports this kiln body, this support is also provided with the driving and transmission mechanism that this kiln can be made to rotate on support roller;
This kiln body is slant setting, and relatively high upper end, position is provided with opening for feed, and opening for feed connects a spoon formula feeding hopper, and the junction of this feeding hopper and this opening for feed is provided with a smoke-box;
Relatively low lower end, this kiln body position is provided with ferronickel discharge port, and this kiln body lower end also connects a gas blower by a swirl injection coal injection pipe; Be provided with a fine coal storehouse above this coal injection pipe, this lower end, fine coal storehouse is communicated with this coal injection pipe; The outside of this kiln body lower end is also provided with cooling cylinder.
Method as above, wherein preferably, a swirl injection nozzle is provided with in described swirl injection coal injection pipe, this nozzle forms one section of inwall in truncated cone-shaped in coal injection pipe, this inwall is provided with spiral helicine groove, when flyash is via this nozzle place, spurt into equably in rotary kiln by this groove affects.
Produce the rotary kiln in ferronickel method for RKEF art breading Indonesia Sulawesi nickel laterite, it can be used as rotary drying kiln as described in claim 1 or revolution reduction kiln, and it comprises:
One kiln body and a support, this support is provided with support roller and supports this kiln body, this support is also provided with the driving and transmission mechanism that this kiln can be made to rotate on support roller;
This kiln body is slant setting, and relatively high upper end, position is provided with opening for feed, and opening for feed connects a spoon formula feeding hopper, and the junction of this feeding hopper and this opening for feed is provided with a smoke-box;
Relatively low lower end, this kiln body position is provided with ferronickel discharge port, and this kiln body lower end also connects a gas blower by a swirl injection coal injection pipe; Be provided with a fine coal storehouse above this coal injection pipe, this lower end, fine coal storehouse is communicated with this coal injection pipe; The outside of this kiln body lower end is also provided with cooling cylinder.
Rotary kiln as above, wherein preferably, a swirl injection nozzle is provided with in described swirl injection coal injection pipe, this nozzle forms one section of inwall in truncated cone-shaped in coal injection pipe, this inwall is provided with spiral helicine groove, when flyash is via this nozzle place, spurt into equably in rotary kiln by this groove affects.
A kind of swirl injection nozzle producing the rotary kiln of ferronickel for RKEF art breading Indonesia Sulawesi nickel laterite, this nozzle is located in swirl injection coal injection pipe, this nozzle forms one section of inwall in truncated cone-shaped in coal injection pipe, this inwall is provided with spiral helicine groove, when flyash is via this nozzle place, spurt into equably in rotary kiln by this groove affects.
Beneficial effect of the present invention is:
(1) the invention provides a kind of various red soil nickel ores being difficult to smelt such as Indonesia's Sulawesi nickel laterite that can effectively process to produce the technology of ferronickel.And according to the inventive method, the laterite adopted directly can be used as flue dust granulation binder, can economize no-bonder cost.
(2) adopt the inventive method to process, nickel reduction ratio is higher, and rotary kiln not ring formation; Reclaim nickel grade about 19%, the rate of recovery can reach about 91%.And it is high to reclaim the ferronickel quality obtained, and can directly make stainless raw materials for production.
(3) compare with electric furnace process with blast furnace process of the prior art, the main energy sources in the inventive method is coal, instead of the coke of costliness and electric energy.
(4) rotary kiln coal powder injection of the prior art was all that gas blower directly blows and sprays electric coal fuel in the past, the invention provides a kind of swirl injection nozzle, adopted swirl injection gas blower coal powder injection mode, and make coal powder injection more abundant, even, energy-saving effect is obvious.
(5) the inventive method uses rotary kiln directly to carry out also original production, energy-conservation, economize on electricity, environmental protection, efficiently.
Accompanying drawing explanation
Fig. 1 is the one-piece construction schematic diagram of the present invention's swirl injection rotary kiln used.
Fig. 2 is the front schematic view of the present invention's swirl injection nozzle used.
Embodiment
Embodiment 1. testing installation
Test wire of the present invention is by main equipment: ∮ 1 × 10m rotary drying kiln, and ∮ 1.5 × 12.5m turns round reduction kiln, 1000KVA ore-smelting furnace; Utility appliance: 250 × 150mm jaw crusher, ∮ 1500mm disk pelletizing machine; Flue gas dust collection system; Testo360 type smoke detecting instrument, terminal control system etc. four part composition.
As shown in Figure 1, the rotary kiln that the present invention is used, comprise kiln body 1 and a support 2, this support is provided with support roller 3 and supports this kiln body.This support 2 is also provided with the driving and transmission mechanism that this kiln body 1 can be made to rotate on support roller 3, wherein one is preferred embodiment: this drive unit is motor 4, and it connects a wheel box 5, and by gear 6 transmission to kiln body 1.
This kiln body 1 is in slant setting, and relatively high upper end, position is provided with opening for feed, and opening for feed connects a spoon formula feeding hopper 7, and the junction of this feeding hopper 7 and this opening for feed is provided with a smoke-box 8.
Relatively low lower end, this kiln body 1 position is provided with ferronickel discharge port 9, and this kiln body 1 lower end also connects a gas blower 11 by a swirl injection coal injection pipe 10.Be provided with a fine coal storehouse 12 above this coal injection pipe 10, this lower end, fine coal storehouse 12 is communicated with this coal injection pipe 10; The outside of this kiln body 1 lower end is also provided with cooling cylinder 13.
A swirl injection nozzle (not shown) is also provided with in described swirl injection coal injection pipe 10.As shown in Figure 2, this swirl injection nozzle forms the inwall 141 of a truncated cone-shaped in swirl injection coal injection pipe 10, and this inwall 141 is provided with many spiral helicine grooves 142.When flyash is via this nozzle place, spurt into equably in rotary kiln by this groove 142 affects.
The inventive method uses rotary kiln directly to carry out also original production, has energy-conservation, economize on electricity, environmental protection, the advantage such as efficient.Use swirl injection nozzle provided by the invention, adopt swirl injection gas blower coal powder injection mode, coal powder injection can be made more abundant, even, and coal ash sprays more even, and in kiln, accessible temperature is higher, and therefore energy-saving effect is fairly obvious.
Embodiment 2. experiment process
Test technology flow process of the present invention is:
Test laterite carries out prescreening through 50mm diagrid, and sieve upper part is crushed to after-50mm through jaw crusher and mixes with screen undersize, delivers to the moisture that rotary drying kiln carries out being dried to needs.Dried laterite is allocated reduction coal into and is entered reduction kiln and carry out prereduction.Calcining after reduction directly hangs in electric furnace with hot batch can and carries out retailoring.Dry, reduction uses coal-fired as the energy.Rotary kiln drying, reduction, the flue dust that electrosmelting produces, respectively through bagroom trapping, returns raw ore batching after granulation.After electrosmelting completes, slag, ferronickel are by slag tap and iron notch is released respectively, and the ferronickel sampling elements such as direct reading spectrometry real-time analysis Ni, Fe, C, Si, P, S, slag sampling chemical method analyzes Ni, Fe, SiO
2, MgO, Al
2o
3, the composition such as CaO.
The concrete testing sequence of embodiment 3. and result
3.1 test raw materials
Test picks up from Indonesia's Sulawesi nickel minerals with 400 tons of laterites, and sample ore on average contains Ni1.99wt%, containing Fe 12.37wt%, and moisture 35.02wt%; Fe/Ni=6.22(w/w), SiO
2/ MgO=1.87(w/w), Mg and Si content is higher, belongs to silicon magnesium types nickel laterite.Test laterite composition refers to table 1.
Laterite material composition is used in table 1 test
| Element | Ni | MgO | Cr 2O 3 | Co | Fe | SiO 2 | Al 2O 3 | S |
| % | 1.99 | 19.09 | 1.17 | 0.027 | 13.72 | 42.14 | 2.61 | 0.086 |
| Element | C | H 2O | Cu | Mn | CaO | Burn and lose | P | |
| % | 0.88 | 35.50 | 0.008 | 0.222 | 1.51 | 13.54 | 0.023 |
Test reduction coal is popular smokeless coal, and analysis of components is in table 2.
Reduction coal composition is used in table 2 test
3.2 laterite drying tests
The object of laterite drying removes portion of water contained in raw ore, avoids producing excessive dust in process simultaneously.This section test will find out the dry rear moisture in ore deposit and the relation of dust-producing amount, determines best drying conditions.Laterite rotary kiln drying mineral water divide be set as moisture 12%, 15%, 18%, 20%, 22%(is all weight percentage), corresponding dust-producing amount test-results refers to table 3.
Table 3 moisture drying test-results
As can be seen from data in table, dry ore deposit is moisture lower, and dust-producing amount is larger.By controlling the suitable moisture in dry ore deposit, effectively dust-producing amount can be controlled.Controlling dry ore deposit when therefore advising this ore deposit industrial production moisture is that 20 ~ 22wt% is more suitable.
3.3 prereduction tests
Reducing roasting is the important step in the technical process of RKEF method, adjusts the reduction degree of nickel in calcining, ensure reduction kiln not ring formation simultaneously in process of the test by the proportioning of control reducing roasting temperature, reductive agent.In suitable temperature range and under the certain reductive agent amount of allocating into condition, reduction degree and maturing temperature positive correlation.In the slag of ring formation temperature and laterite and reduction coal, the softening temperature of ash is relevant.Therefore, the ring formation temperature of different laterites, different reduction coal is not quite similar.
This test reduction kiln maturing temperature node sets is: 800 DEG C, 900 DEG C, 1000 DEG C and 1100 DEG C, and the amount of allocating into of reduction coal is the 7wt% in butt ore deposit, and test-results refers to table 4.
Table 4 prereduction test-results
As can be seen from Table 4: during maturing temperature about 900 DEG C, metallic nickel, iron and ferrous reduction degree index are all better.Reduction kiln starts ring formation 1000 DEG C time, and calcining sintering is serious, but ring formation block and agglomerate hardness are not quite, easily smash.Therefore maturing temperature should be controlled at about 900 DEG C during this sample ore industrial production.
3.4 reasonable nickel product bit tests
Rational ferronickel grade refers to when ensureing that the technico-economical comparisones such as nickel recovery, quality product and energy consumption are good, nickeliferous grade in Rhometal.Ferronickel grade, by the amount of allocating into of reduction coal in adjustment reduction kiln and electric furnace, controls the reduction ratio of iron under the condition that nickel fully reduces, thus improves or reduce the nickeliferous grade of ferronickel.Proved by a large amount of tests, in ferronickel, the grade of nickel is controlled within the specific limits.
The amount of allocating into of test setting reduction coal be butt ore deposit 11%, 9%, 7%, 5%, 3%(weight percent), examine or check ferronickel grade and the rate of recovery with this understanding, test-results is in table 5.
Table 5 is nickel grade test-results rationally
| The reduction coal amount of allocating into wt% | 11 | 9 | 7 | 5 | 3 |
| Ferronickel grade wt% | 12.32% | 14.97% | 18.66% | 22.52% | 25.67% |
| Nickel recovery wt% | 91.2 | 90.9 | 90.8 | 88.6 | 80.3 |
Test-results shows, along with the raising of the reduction coal amount of allocating into, in ferronickel, the rate of recovery of nickel rises, and nickel grade declines.Consider Technological Economy factor, the reasonable nickel grade 18.66% of ferronickel produced by this sample ore.The rate of recovery is now 90.8%.The suggestion 19 ± 2% of industrial production ferronickel grade is proper, and this condition slag is nickeliferous is about 0.08%.
Under about 19% nickel grade condition, Rhometal composition is analyzed, the results are shown in Table 6.
Table 6 Rhometal composition
| Sequence number | C | Cu | Cr | Ni | Fe | Co | S | Si | P |
| 1 | 0.72 | 0.022 | 0.620 | 19.35 | 77.7 | 0.255 | 0.231 | 0.900 | 0.107 |
| 2 | 1.08 | 0.022 | 0.467 | 20.13 | 77.5 | 0.204 | 0.341 | 0.033 | 0.096 |
| 3 | 0.87 | 0.024 | 0.387 | 18.74 | 79.2 | 0.252 | 0.187 | 0.089 | 0.096 |
The bit test of reasonable ferronickel product, has found two problems by alloy analysis of components and to experimental phenomena observation:
(1) alloy impurity exceeds standard containing P
Find in process of the test that the content of P in Rhometal product is far longer than estimated value, add up ferro-nickel product by analysis on average containing P about 0.1%.It is about 35% that P enters alloy Constant, and contrast containing grade with raw ore, enrichment times is greater than 4, needs to attract great attention.
P compares stubborn problem, before its reduction sequence comes Fe, and almost its enrichment in the product uncontrollable in smelt production.Therefore, according to property of raw material, the mode of batching dilution can only be taked to be controlled, or takes refining measure to carry out de-P process to product in production.But do like this and not only bother, also will increase cost.
(2) foamy slag occurs
When carrying out 25% nickel product bit test, the amount of allocating into of reduction coal drops to 3%, produces a large amount of foamy slags in electric furnace, and condition slag is nickeliferous is up to 1.24% for this, has had a strong impact on the rate of recovery, and has narrowly caused security incident.Therefore the generation of foamy slag to strictly be controlled in production practice process, the ferronickel grade not coveting too high.
Foamy slag Producing reason: one is the minimizing due to reductive agent, the resistance of the bed of material increases, and electrode insertion depth increases, and furnace bottom alloy temperature raises, and decarburizing reaction improves rapidly, produces a large amount of gas instantaneously; Two is because the minimizing of reductive agent causes reaction heat to reduce, and slag temperature declines and causes top layer crust gas to discharge not smooth.So when gas rises and can not discharge in time again to a certain extent, slag is heaved by gas and is just created foamy slag.
3.5 smelting temperature tests
In laterite smelting process, Rhometal and slag tapping temperature are selected the impact of smelting technology economic target larger.Slag temperature is too low, and it is bad that slag glues mobility, and nickel reduction is not thorough, and nickel is separated bad with slag, affect nickel recovery; Slag temperature is too high, need consume a large amount of electric energy and reduce lining life.Alloy temperature is too low, causes and cannot cast; Alloy temperature is too high, also needs consume a large amount of electric energy and affect lining life.Therefore, suitable tapping temperature is selected to be nickel-iron smelting critical technical parameter.In order to determine rational smelting temperature, testing and Rhometal and slag composition are analyzed, and carried out differential thermal analysis respectively, determine the smelting temperature that this sample ore is suitable on this basis.
(1) Rhometal and slag composition
Test Rhometal and slag composition are in table 7 and table 8.
Table 7 ferronickel component list
| Heat | C | Cu | Cr | Ni | Fe | Co | S | Si | P |
| 50 | 0.383 | 0.030 | 0.111 | 25.24 | 73.47 | 0.301 | 0.207 | 0.004 | 0.096 |
| 63 | 0.450 | 0.022 | 0.231 | 22.24 | 76.2 | 0.268 | 0.360 | 0.004 | 0.096 |
| 70 | 1.08 | 0.022 | 0.467 | 20.13 | 77.5 | 0.204 | 0.341 | 0.033 | 0.096 |
| 75 | 1.21 | 0.023 | 0.940 | 18.00 | 78.5 | 0.236 | 0.610 | 0.610 | 0.096 |
Table 8 slag composition table
| Heat | Ni | Fe | C | S | P | SiO2 | MgO | Al 2O 3 | Cr 2O 3 |
| 50 | 0.224 | 5.20 | 0.13 | 0.08 | 0.017 | 55.76 | 24.91 | 2.65 | 1.17 |
| 63 | 0.079 | 13.94 | 0.19 | .021 | 0.019 | 49.54 | 27.13 | 2.39 | 1.59 |
| 70 | 0.102 | 4.44 | 0.08 | 0.09 | 0.015 | 53.61 | 24.87 | 3.15 | 1.16 |
| 75 | 0.094 | 6.51 | 0.14 | 0.13 | 0.016 | 60.49 | 27.51 | 3.45 | 1.13 |
(2) Rhometal and slag melting are determined
Test carries out differential thermal analysis respectively to above sample, has measured ferronickel and slag melting, the results are shown in Table 9.
Table 9 ferronickel and slag melting result
| Project | 50# | 63# | 70# | 75# |
| Ferronickel fusing point DEG C | 1439 | 1426 | 1379 | 1359 |
| Slag melting DEG C | 1433 | 1440 | 1426 | 1426 |
According to differential thermal analysis result, the Rhometal fusing point of nickel grade about 19% is between 1360 ~ 1380 DEG C, and during production, Rhometal releasing temperature is proper between 1450 ~ 1500 DEG C; Slag melting is between 1420 ~ 1440 DEG C, and during production, slag releasing temperature is advisable between 1550 ~ 1600 DEG C.Pilot plant test checking is substantially identical with the above results.
3.6 flue dust are granulated and are tested
The flue dust that laterite smelting process produces returns smelting system in the mode of granulating substantially.Multiple flue dust granulation scheme has been attempted in this test, but result is all undesirable.According to the tough feature of Indonesia's Sulawesi laterite, using wet laterite as the binding agent of flue dust, add a small amount of water, adopt disk pelletizing machine to granulate.Do the cost reducing the outer adding additives of flue dust granulation like this.This section test determines the optimum proportioning condition of flue dust, wet ore deposit, water three.
(1) laterite proportioning
The wet laterite amount of allocating into of test setting is respectively 15%, 20%, 25%, 30% of fume amount.
Dustball is moisture to be respectively: 20%, 25%, 30%, 35%.
(2) test-results
Carry out returning dirt test by the test conditions determined, return dirt ratio with reference to the normal dust-producing amount of smelt production, determine effect best be sequence number 4, test-results is in table 10.
Table 10 is granulated test-results table
As can be seen from the above table, the test-results of sequence number 4 is best, but its dustball moisture and ore proportioning quantity are all comparatively large, ball cost processed and subsequent treatment cost also higher.The test-results of reference number 3 and granulation overall economics index, determine that best granulation conditions is: the wet ore deposit amount of allocating into is the 25wt% of flue dust, the obtained moisture 30wt% of dustball.
4. conclusion
(1) proved by pilot scale research, adopt RKEF art breading Indonesia Sulawesi nickel laterite to produce ferronickel technical feasibility.Dry ore deposit water ratio 20 ~ 22wt% is proper; Reduction kiln baking operation temperature controls at about 900 DEG C, and now nickel reduction ratio is higher, and rotary kiln not ring formation; The amount of allocating into of reduction coal is advisable with 7wt%, and now nickel grade about 19%, the rate of recovery reach about 91%.
(2) Reasonable Grade testing sample ore electrosmelting ferronickel is 19 ± 2%, and now technico-economical comparison is best.Use this ore deposit also can the Rhometal of production grade 25%, but nickel recovery loss be comparatively large, and occurs foamy slag, be unfavorable for safety in production.
(3) because sample ore is higher containing P, the concentration ratio of smelting process P in ferro-nickel product reaches more than 4 times, product can be caused to contain P and exceed standard, and should note joining ore deposit or taking de-P measure in production.
(4) research shows, test mining and metallurgy nickel metallurgy iron alloy, slag releases temperature 1550 ~ 1600 DEG C, and Rhometal releasing temperature 1450 ~ 1500 DEG C is comparatively suitable.
(5) this test laterite directly can be used as flue dust granulation binder, can economize no-bonder cost.
(6) compare with electric furnace process with blast furnace process of the prior art, the main energy sources in the inventive method is coal, instead of the coke of costliness and electric energy.
(7) swirl injection nozzle provided by the invention, adopts swirl injection gas blower coal powder injection mode, and make coal powder injection more abundant, even, energy-saving effect is obvious.
(8) the inventive method uses rotary kiln directly to carry out also original production, energy-conservation, economize on electricity, environmental protection, efficiently.
Claims (5)
1. RKEF art breading Indonesia Sulawesi nickel laterite produces a method for ferronickel, and it is characterized in that, step is as follows:
A. laterite raw material is carried out prescreening through 50mm diagrid, sieve upper part is crushed to after-50mm through jaw crusher and mixes with screen undersize;
B. mixed laterite is delivered to rotary drying kiln and carry out drying, until water content reaches 20 ~ 22wt% of laterite gross weight;
C. dried laterite allocate into reduction coal enter revolution reduction kiln carry out prereduction;
D. the calcining after reduction directly hangs in electric furnace with hot batch can and carries out retailoring;
E. the flue dust produced in drying, prereduction and retailoring process, respectively through bagroom trapping, returns raw ore batching after granulation;
F., after retailoring completes, slag, ferronickel are by slag tap and iron notch is released respectively, and the ferronickel sampling elements such as direct reading spectrometry real-time analysis Ni, Fe, C, Si, P, S, slag sampling chemical method analyzes Ni, Fe, SiO
2, MgO, Al
2o
3, the composition such as CaO;
Wherein, the maturing temperature of the prereduction of step c is at 900 ~ 950 DEG C, and the add-on of reduction coal is the 7wt% of laterite weight.
2. the method for claim 1, is characterized in that, in described granulation step, allocates wet ore deposit into by the 25wt% of flue dust, the obtained moisture 30wt% of dustball.
3. the method for claim 1, is characterized in that, described rotary drying kiln comprises:
One kiln body and a support, this support is provided with support roller and supports this kiln body, this support is also provided with the driving and transmission mechanism that this kiln can be made to rotate on support roller;
This kiln body is slant setting, and relatively high upper end, position is provided with opening for feed, and opening for feed connects a spoon formula feeding hopper, and the junction of this feeding hopper and this opening for feed is provided with a smoke-box;
Relatively low lower end, this kiln body position is provided with ferronickel discharge port, and this kiln body lower end also connects a gas blower by a swirl injection coal injection pipe; Be provided with a fine coal storehouse above this coal injection pipe, this lower end, fine coal storehouse is communicated with this coal injection pipe; The outside of this kiln body lower end is also provided with cooling cylinder.
4. the method for claim 1, is characterized in that, described revolution reduction kiln comprises:
One kiln body and a support, this support is provided with support roller and supports this kiln body, this support is also provided with the driving and transmission mechanism that this kiln can be made to rotate on support roller;
This kiln body is slant setting, and relatively high upper end, position is provided with opening for feed, and opening for feed connects a spoon formula feeding hopper, and the junction of this feeding hopper and this opening for feed is provided with a smoke-box;
Relatively low lower end, this kiln body position is provided with ferronickel discharge port, and this kiln body lower end also connects a gas blower by a swirl injection coal injection pipe; Be provided with a fine coal storehouse above this coal injection pipe, this lower end, fine coal storehouse is communicated with this coal injection pipe; The outside of this kiln body lower end is also provided with cooling cylinder.
5. the method as described in claim 3 or 4, it is characterized in that, a swirl injection nozzle is provided with in described swirl injection coal injection pipe, this nozzle forms one section of inwall in truncated cone-shaped in coal injection pipe, this inwall is provided with spiral helicine groove, when flyash is via this nozzle place, spurt into equably in rotary kiln by this groove affects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210167023.2A CN103421922B (en) | 2012-05-25 | 2012-05-25 | Method for producing ferronickel by processing laterite nickel ore in Sulawesi, Indonesia through RKEF technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210167023.2A CN103421922B (en) | 2012-05-25 | 2012-05-25 | Method for producing ferronickel by processing laterite nickel ore in Sulawesi, Indonesia through RKEF technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103421922A CN103421922A (en) | 2013-12-04 |
| CN103421922B true CN103421922B (en) | 2015-03-18 |
Family
ID=49647313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210167023.2A Expired - Fee Related CN103421922B (en) | 2012-05-25 | 2012-05-25 | Method for producing ferronickel by processing laterite nickel ore in Sulawesi, Indonesia through RKEF technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103421922B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104451148A (en) * | 2014-12-01 | 2015-03-25 | 偏关县晋电化工有限责任公司 | Production technology for smelting ferronickel from laterite-nickel ore |
| CN106088694B (en) * | 2016-06-08 | 2018-05-08 | 中冶南方工程技术有限公司 | Lateritic nickel ore raw material storage and lateritic nickel ore stock preparation system |
| CN106964465A (en) * | 2017-04-26 | 2017-07-21 | 江苏德龙镍业有限公司 | Nickel soil ore deposit pretreating device |
| CN110343878B (en) * | 2019-07-22 | 2021-03-19 | 广西冶金研究院有限公司 | Energy-saving and environment-friendly production method of nickel-iron alloy |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201611208U (en) * | 2009-12-31 | 2010-10-20 | 中国恩菲工程技术有限公司 | Nickel-containing material calcination device |
| CN202171388U (en) * | 2011-07-15 | 2012-03-21 | 攀枝花泓兵钒镍有限责任公司 | Rotary kiln for smelting red soil nickel ores |
| CN202973836U (en) * | 2012-05-25 | 2013-06-05 | 李宾 | Rotary kiln for producing ferronickel from Indonesia Sulawesi nickel laterite ore through RKEF (rotary kiln-electric furnace) technical processing |
-
2012
- 2012-05-25 CN CN201210167023.2A patent/CN103421922B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201611208U (en) * | 2009-12-31 | 2010-10-20 | 中国恩菲工程技术有限公司 | Nickel-containing material calcination device |
| CN202171388U (en) * | 2011-07-15 | 2012-03-21 | 攀枝花泓兵钒镍有限责任公司 | Rotary kiln for smelting red soil nickel ores |
| CN202973836U (en) * | 2012-05-25 | 2013-06-05 | 李宾 | Rotary kiln for producing ferronickel from Indonesia Sulawesi nickel laterite ore through RKEF (rotary kiln-electric furnace) technical processing |
Non-Patent Citations (2)
| Title |
|---|
| 镍红土矿RKEF法工艺进展;秦丽娟等;《有色矿冶》;20120430;第28卷(第2期);34-36，39 * |
| 镍红土矿干燥含水量控制和烟尘制团方法;赵景富等;《有色矿冶》;20111231;第27卷(第6期);29-31 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103421922A (en) | 2013-12-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101413057B (en) | Method for efficiently separating low-ore grade and complicated iron ore | |
| CN104404246B (en) | The method improving metallurgical slag pelletizing degree of metalization | |
| CN101538645A (en) | Technique for roasting and dressing laterite nickel ore | |
| CN102766718B (en) | Method for producing sponge iron and zinc-rich materials by blast furnace zinc-containing ash | |
| CN101418389B (en) | Method for directly reducing grain nickel iron in rotary kiln by using laterite nickle mine | |
| CN104313308B (en) | Iron ore low-carbon sintering method | |
| CN103421922B (en) | Method for producing ferronickel by processing laterite nickel ore in Sulawesi, Indonesia through RKEF technology | |
| CN101418378A (en) | Method for adding additive agent in reducing roasting process of laterite nickle mine | |
| CN102094093A (en) | Method for producing ferronickel alloy grain by directly reducing lateritic nickel ore by rotary kiln | |
| CN103643034A (en) | Method for reducing granular ferronickel through laterite-nickel ore in two-stage rotary kiln | |
| CN103290161B (en) | Equipment and method for carrying out slag-iron separation and iron reduction on refractory ore, complex ore and chemical industry ferruginous waste | |
| CN202973836U (en) | Rotary kiln for producing ferronickel from Indonesia Sulawesi nickel laterite ore through RKEF (rotary kiln-electric furnace) technical processing | |
| CN104164556A (en) | Chain grate-tandem rotary kiln whole-particle fraction magnetic roasting process for refractory low-grade iron ore | |
| CN105907990B (en) | A kind of method for producing ferro-niobium | |
| CN103866115B (en) | The preparation of red soil nickel ore single stage method is containing the method for nickel and stainless steel raw material | |
| CN102268502B (en) | Spongy iron preparation method by smelting refractory iron ore (slag) with reduction rotary kiln | |
| CN103667700A (en) | Production method for smelting high carbon chromium iron by using carbonaceous combination reducing agent | |
| CN101538628A (en) | Method for directly reducing laterite-nickel into nickel-bearing ball iron in tunnel kilns | |
| CN101603141B (en) | Method for producing ferronickel by utilizing low-magnesium intermediate type laterite nickel ore | |
| CN104263916A (en) | Adhesive for pellet and preparation method of pellet | |
| CN101638703B (en) | Method for directly reducing nickel containing pig iron by lateritic nickel in tunnel kiln | |
| CN206256139U (en) | The system for processing zinc leaching residue | |
| CN105200228B (en) | A kind of processing method of DRI pelletizings | |
| CN101418356A (en) | A kind of from nickel oxide ore the method for refining ferronickel alloy | |
| CN103436698A (en) | Method for directly reducing laterite-nickel ore to produce ferronickel alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150318 Termination date: 20200525 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |