CN101423897A - Method for extracting nickel oxide from lateritic nickel - Google Patents

Method for extracting nickel oxide from lateritic nickel Download PDF

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CN101423897A
CN101423897A CNA2008102290499A CN200810229049A CN101423897A CN 101423897 A CN101423897 A CN 101423897A CN A2008102290499 A CNA2008102290499 A CN A2008102290499A CN 200810229049 A CN200810229049 A CN 200810229049A CN 101423897 A CN101423897 A CN 101423897A
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nickel
solution
red soil
slag
nickel ore
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翟玉春
刘岩
牟文宁
吴艳
解淑倩
赵昌明
许茜
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Northeastern University China
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Abstract

The invention provides a method for extracting nickel oxide from lateritic nickel ores. The method comprises the following steps: the lateritic nickel ores are adopted to react with alkali; an obtained sodium silicate solution is used for preparing silicon dioxide through carbonization and decomposition; filter residue is carbonized and leached so as to obtain a magnesium bicarbonate solution; the magnesium bicarbonate solution is heated and decomposed so as to obtain magnesium carbonate; the remaining filter residue reacts with ammonium carbonate and then is filtered; and the nickel oxide is prepared from filtrate through ammonia distillation and calcinations. The remaining filter residue is mainly ferric oxide containing a few impurities, and can be used as an ironmaking raw material or to be deeply processed into the products with high additional value. The method has the advantages that the method is suitable for treating various lateritic nickel ores, simple in process flow and convenient in equipment, realizes the high-additional-value environment-friendly comprehensive utilization of lateritic nickel ore resources and the recycling of chemical raw materials, emits no waste residue, waste liquid or waste gas, and meets the requirements of industrial production.

Description

A kind of method of extracting nickel oxide from red soil nickel ore
Technical field
The present invention relates to a kind of method of handling red soil nickel ore, be specifically related to a kind of method, belong to non-ferrous metal hydrometallurgy field from red soil nickel ore extraction nickel oxide.
Background technology
World's continental rise nickel reserves are about 6.2 hundred million t, and wherein 30% form with nickel sulfide ore exists, and 70% form with red soil nickel ore exists.About in the world 60% nickel extracts from nickel sulfide ore at present, but along with the continuous increase of nickel demand and the minimizing gradually that can supply the nickel sulfide ore resource of exploitation, the economic development of red soil nickel ore has become the research focus of current metallurgy of nickel.
Red soil nickel ore is nickeliferous ore through long-term weathering, soaks pouring, alteration, enrichment and form, the loose argillaceous ore of being made up of hydrous oxides such as iron, aluminium, silicon.The red soil nickel ore mineral deposit generally is divided into three layers, and the upper strata is a limonite, and iron, cobalt contents are higher, and silicon, magnesium, nickel content are lower; Lower floor is a noumeite, silicon, Mg content height, and iron, cobalt contents are lower, but the content of nickel is higher; The centre is a transition layer, and each major metal content is between the upper and lower.
At present, both at home and abroad the treatment process of red soil nickel ore has two kinds of pyrogenic process and wet methods.Thermal process is according to the difference of the finished product, be divided into ferronickel technology and nickel matte technology, this technology is fit to handle the ore that nickel is of high grade, magnesium is high, iron is low, is to handle the reasonable technology of red soil nickel ore effect, but there is the energy consumption height, pollutes and heavily wait problem, do not meet the direction of Future Social Development.Wet processing mainly contains technical process such as reduction-ammonia leaching process, high pressure pickling process, normal pressure pickling process, microorganism leaching.Reduction-ammonia soaking technology is a wet processing the earliest, and this technology is fit to handle the red soil nickel ore on upper strata, mineral deposit, is not suitable for handling the high ore bed of lower floor's silicon Mg content, has limited the application of ammonia leaching process.The high pressure acid leaching process is the technology that grows up the fifties in last century, and this technology is compared with other flow processs, and the leaching yield of nickel, cobalt is all higher.But this technology only is fit to handle the lower red soil nickel ore of Mg content, because Mg content is high in the ore can strengthen sour consumption and influence technical process.In addition, the highly compressed operational condition has also limited the application of high pressure pickling process.The normal pressure acid leaching process is the comparatively popular direction of present red soil nickel ore treatment process research, have that technology is simple, energy consumption is low, do not use autoclave, few, the simple operation and other advantages of investment cost, but nickel content height in the leached mud is seriously polluted.The microorganism lixiviation process is a kind of red soil nickel ore treatment process of relatively environmental protection, but exist production cycle length, microorganism culturing cost height, organic acid can not recycle etc. problem.
The method of above-mentioned processing red soil nickel ore all is the nickel that only is conceived to reclaim wherein, the recovery that has iron and cobalt, other materials all become waste sludge discharge, serious environment pollution.Therefore, the novel process and the new technology of red soil nickel ore handled in research, red soil nickel ore carried out the high value-added greening comprehensive utilization have important and practical meanings and using value.
Summary of the invention
Fail the present situation rationally handled at red soil nickel ore, the invention provides a kind of method of high value-added greening comprehensive utilization red soil nickel ore.
Purpose of the present invention can reach by following measure:
Red soil nickel ore is levigate to 80 μ m, with the sodium hydroxide reaction,, can be divided into two kinds of methods of fusion alkaline process and alkaline solution lixiviation process according to the difference of reaction conditions.The fusion alkaline process is that red soil nickel ore is mixed by mass ratio 1:2～1:6 with solid sodium hydroxide, after under temperature is 300～550 ℃ and stirring condition, reacting 10～120min, system temperature is reduced to below 100 ℃, the water that adds 2～5 times of volumes, stir 30～60min at 80～90 ℃, leach the water glass that generates.The alkaline solution lixiviation process is to be that 30%～90% sodium hydroxide solution mixes by mass volume ratio (g:ml) 1:2～1:6 with red soil nickel ore and concentration, after under temperature is 100～300 ℃ and stirring condition, reacting 30～180min, system temperature is reduced to below 100 ℃, the water dilution that adds 2～5 times of volumes, continue to stir 20～40min at 80～90 ℃, leach the water glass that generates.Filtering separation, filter cake are to contain 1 of oxyhydroxide such as magnesium, iron, nickel #Slag, filtrate are sodium silicate solution and unreacted sodium hydroxide solution.
The main chemical reactions that relates to is:
MgO+SiO 2+2NaOH＝Mg(OH) 2↓+Na 2SiO 3
Sodium silicate solution under the condition of 60～90 ℃ of temperature, is fed carbon dioxide while stirring, and the content of carbonic acid gas is 20%～90% in the gas, and all the other are nitrogen, and gas flow is 30～150ml/min.Drop to 8.5～9 until the pH of solution value.If foreign matter content height in the sodium silicate solution can transfer to 13 with pH earlier, filtering separation is removed the high precipitation of silica of foreign matter content, and then continuation feeding carbonic acid gas transfers to 8.5～9 with the pH value of solution value.Filter, obtain sodium carbonate solution and filter cake.Filter cake can obtain the silicon-dioxide powdery that median size is about 15 μ m at 60～80 ℃ of drying 4～12h after washing.Sodium carbonate solution generates sodium hydroxide solution and precipitation of calcium carbonate at 70～90 ℃ of following and calcium oxide reaction 5～20min.Wherein the mass ratio of calcium oxide and yellow soda ash is 1:1～1.5:1.Sodium hydroxide solution can be used for handling red soil nickel ore after concentrating, realize recycle.The lime carbonate thermal degradation generates calcium oxide and carbonic acid gas, and calcium oxide is used for the causticization of sodium carbonate solution, and the carbonization decomposition reaction that carbonic acid gas is used for sodium silicate solution all realizes recycle.
The chemical reaction that water glass carbonization decomposition course relates to is:
Na 2SiO 3+CO 2+H 2O＝SiO 2·H 2O+Na 2CO 3
2NaOH+CO 2＝Na 2CO 3+H 2O
The chemical reaction that sodium carbonate solution causticization process relates to is:
Na 2CO 3+CaO+H 2O＝CaCO 3↓+2NaOH
CaCO 3＝CaO+CO 2↑
With red soil nickel ore after alkaline purification, the elimination sodium silicate solution obtain 1 #Slag mixes by mass volume ratio (g:ml) 1:20～1:50 with water, controlled temperature is 15～30 ℃, and the flow with 50～200ml/min under the agitation condition feeds carbon dioxide, and the pH value of solution reaches at 7.5～8.0 o'clock, filtering separation obtains magnesium bicarbonate solution and 2 #Slag.Magnesium bicarbonate solution is heated to 40～80 ℃ stirs 30～180min down, generate precipitation.Filter, filter cake is through washing, and drying can obtain magnesiumcarbonate.
1 #The chemical reaction that the slag carbonization process relates to is:
Mg(OH) 2+CO 2+2H 2O＝MgCO 3·3H 2O↓
MgCO 3·3H 2O+CO 2+＝Mg(HCO 3) 2+2H 2O
The chemical reaction that the magnesium bicarbonate solution pyrolytic process relates to is:
Mg(HCO 3) 2+2H 2O＝MgCO 3·3H 2O↓+CO 2↑
With 2 #Slag and concentration are that the sal volatile of 2～8mol/ml mixes by mass volume ratio (g:ml), are under 30～70 ℃ the condition in temperature, bubbling air while stirring, reaction 60～240min.Filtering separation obtains nickel amine complex solution and 3 #Slag, essential substance is a ferric oxide in the slag, can be used as iron-smelting raw material or deep processing becomes high value added product.With nickel amine complex solution after 90～100 ℃ of ammonia still process, filtering separation, filter cake is a basic nickel carbonate.Basic nickel carbonate is made the nickel oxide product 300～600 ℃ of calcinings, and ammonia that the ammonia still process process produces and carbon dioxide recovery are returned ammonia and are soaked, and the carbonic acid gas that the basic nickel carbonate calcining produces returns carbonation process through collection.
Volatile salt leaches the chemical reaction that relates to:
Ni 2++6NH 3·H 2O＝[Ni(NH 3) 6] 2++6H 2O
Fe 2++6NH 3·H 2O＝[Fe(NH 3) 6] 2++6H 2O
Figure A200810229049D00061
The chemical reaction that ammonia still process relates to:
2Ni(NH 3) 6CO 3+2H 2O＝Ni(OH) 2·NiCO 3·H 2O↓+12NH 3↑+CO 2↑
(NH 4) 2CO 3＝2NH 3+CO 2↑+H 2O
The chemical reaction that the basic nickel carbonate calcining relates to:
3Ni(OH) 2·2NiCO 3＝5NiO+3H 2O+2CO 2↑
The inventive method technical process is simple, simple equipments has prepared silicon-dioxide, magnesiumcarbonate and nickel oxide with lower cost, has realized the high added value comprehensive utilization of red soil nickel ore resource and the recycle of industrial chemicals, no waste residue, waste liquid, exhaust gas emission meet industrial requirement.
Description of drawings
Extract the process flow sheet of nickel oxide from red soil nickel ore
Embodiment
Embodiment 1
Used red soil nickel ore consists of: NiO 0.91%, SiO 238.74%, MgO 22.53%, Fe 2O 319.82%, Al 2O 34.65%, CaO 0.62%, Cr 2O 30.55%, other impurity 0.78%, loss on ignition 11.4%.
Levigate red soil nickel ore to 80 μ m is mixed by mass ratio 1:3 with solid sodium hydroxide, under 500 ℃ and stirring condition, react 30min, stop heating then, when being cooled to 90 ℃, add the water of 4 times of volumes, 85 ℃ boil molten 40min after, filter, filtrate is sodium silicate solution, and filter cake is 1 #Slag.
Sodium silicate solution is heated to 80 ℃, and under the stirring condition, the flow velocity feeding carbon dioxide with 100ml/min drops at 9 o'clock until the pH of solution value, filters, and obtains sodium carbonate solution and filter cake.Filter cake can obtain silicon-dioxide powdery that median size be about 15 μ ms at 60 ℃ of following dry 10h through washing after neutral.Sodium carbonate solution generates sodium hydroxide solution and precipitation of calcium carbonate at 70 ℃ of following and calcium oxide reaction 15min.Wherein the mass ratio of calcium oxide and yellow soda ash is 1:1.Sodium hydroxide solution and the equal reusable edible of lime carbonate that this process produces.
With the red soil nickel ore fusion behind alkaline purification elimination sodium silicate solution, obtain 1 #Slag mixes with the mass volume ratio (g:ml) of water by 1:30, under temperature is 15 ℃ and stirring condition, feeds carbon dioxide with the flow velocity of 100ml/min, and system pH reaches at 8.0 o'clock, filtering separation, and filtrate is magnesium bicarbonate solution, filter cake is 2 #Slag.Magnesium bicarbonate solution is pyrolysis 150min under 50 ℃ and the stirring condition in temperature, filters, and filter cake obtains magnesiumcarbonate through washing, drying.
With 2 #Slag and concentration are that the sal volatile of 5mol/ml mixes by mass volume ratio (g:ml) 1:4, are under 50 ℃ the condition in temperature, bubbling air while stirring, and reaction 120min filters, and obtains nickel amine complex solution and 3 #Slag.
Nickel amine complex solution 95 ℃ of ammonia still processs, is obtained basic nickel carbonate, and the ammonia of generation and carbonic acid gas return the ammonia soaking system and test through recovery.Basic nickel carbonate is made the nickel oxide product 400 ℃ of calcinings, produce carbonic acid gas and return carbonation process through recovery.
Embodiment 2
Used red soil nickel ore consists of: NiO 1.03%, SiO 240.57%, MgO 20.31%, Fe 2O 318.66%, Al 2O 33.87%, CaO 0.68%, Cr 2O 30.52%, other impurity 0.86%, loss on ignition 13.65%.
Be that 75% sodium hydroxide solution mixes by mass volume ratio (g:ml) 1:5 with levigate red soil nickel ore to 80 μ m and concentration, under 225 ℃ and stirring condition, react 1.5h, stop heating then, be cooled to 80 ℃, the water dilution that adds 5 times of volumes, after 20min is leached in 85 ℃ of continuation, filtering separation, filtrate is sodium silicate solution, and filter cake is 1 #Slag.
Sodium silicate solution is heated to 85 ℃, and under the agitation condition, the flow velocity feeding carbon dioxide with 150ml/min drops at 8.5 o'clock until the pH of solution value, filters, and obtains sodium carbonate solution and filter cake.Filter cake can obtain silicon-dioxide powdery that median size be about 15 μ ms at 70 ℃ of following dry 5h through washing after neutral.Sodium carbonate solution generates sodium hydroxide solution and precipitation of calcium carbonate at 80 ℃ of following and calcium oxide reaction 10min.Wherein the mass ratio of calcium oxide and yellow soda ash is 1.2:1.Sodium hydroxide solution and the equal reusable edible of lime carbonate that this process produces.
With the red soil nickel ore fusion behind alkaline purification elimination sodium silicate solution, obtain 1 #Wash heat is washed, mixes with the mass volume ratio (g:ml) of water by 1:40, and be under the condition of 20 ℃ and stirring intensity in temperature, feed carbon dioxide with the flow velocity of 150ml/min, system pH reaches at 7.5 o'clock, filters, and filtrate is magnesium bicarbonate solution, and filter cake is 2 #Slag.Magnesium bicarbonate solution is pyrolysis 120min under 60 ℃ and the agitation condition in temperature, filters, and filter cake obtains magnesiumcarbonate through washing, drying.
With 2 #Slag and concentration are that the sal volatile of 5mol/ml mixes by mass volume ratio (g:ml) 1:5, are under 40 ℃ the condition in temperature, bubbling air while stirring, and reaction 180min filters, and obtains nickel amine complex solution and 3 #Slag.
Nickel amine complex solution 90 ℃ of ammonia still processs, is obtained basic nickel carbonate, and the ammonia of generation and carbonic acid gas return the ammonia soaking system and test through recovery.Basic nickel carbonate is made the nickel oxide product 450 ℃ of calcinings, produce carbonic acid gas and return carbonation process through recovery.
Embodiment 3
Used red soil nickel ore consists of: NiO 1.21%, SiO 236.88%, MgO 24.63%, Fe 2O 321.95%, Al 2O 35.05%, CaO 0.57%, Cr 2O 30.61%, other impurity 0.46%, loss on ignition 12.05%.
Be that 85% sodium hydroxide solution mixes by mass volume ratio (g:ml) 1:4 with levigate red soil nickel ore to 80 μ m and concentration, under 250 ℃ and stirring condition, react 1h, stop heating then, when being cooled to 90 ℃, add the water dilution of 3 times of volumes, after 30min is leached in 80 ℃ of continuation, filter, filtrate is sodium silicate solution, and filter cake is 1 #Slag.
Sodium silicate solution is heated to 90 ℃, and under the condition of stirring intensity, the flow velocity feeding carbon dioxide with 100ml/min drops at 9 o'clock until the pH of solution value, filters, and obtains sodium carbonate solution and filter cake.Filter cake can obtain silicon-dioxide powdery that median size be about 15 μ ms at 70 ℃ of following dry 6h through washing after neutral.Sodium carbonate solution generates sodium hydroxide solution and precipitation of calcium carbonate at 90 ℃ of following and calcium oxide reaction 5min.Wherein the mass ratio of calcium oxide and yellow soda ash is 1.5:1.Sodium hydroxide solution and the equal reusable edible of lime carbonate that this process produces.
With the red soil nickel ore fusion behind alkaline purification elimination sodium silicate solution, obtain 1 #Wash heat is washed, and mixes with the mass volume ratio (g:ml) of water by 1:50, under temperature is 20 ℃ and stirring condition, feeds carbon dioxide with the flow velocity of 80ml/min, and system pH reaches at 8.0 o'clock, filtering separation, and filtrate is magnesium bicarbonate solution, filter cake is 2 #Slag.Magnesium bicarbonate solution is pyrolysis 90min under 80 ℃ and the stirring condition in temperature, filters, and filter cake obtains magnesiumcarbonate through washing, drying.
With 2 #Slag and concentration are that the sal volatile of 7mol/ml mixes by mass volume ratio (g:ml) 1:3, are under 60 ℃ the condition in temperature, bubbling air while stirring, and reaction 90min filters, and obtains nickel ammine solution and 3 #Slag.
Nickel ammine solution 100 ℃ of ammonia still processs, is obtained basic nickel carbonate, and the ammonia of generation and carbonic acid gas return the ammonia soaking system and test through recovery.Basic nickel carbonate is made the nickel oxide product 500 ℃ of calcinings, produce carbonic acid gas and return carbonation process through recovery.
Embodiment 4
Used red soil nickel ore consists of: NiO 1.48%, SiO 240.83%, MgO 23.42%, Fe 2O 320.71%, Al 2O 33.97%, CaO 0.53%, Cr 2O 30.46%, other impurity 0.82%, loss on ignition 7.08%.
Levigate red soil nickel ore to 80 μ m is mixed by mass ratio 1:5 with solid sodium hydroxide, under 450 ℃ and stirring condition, react 60min, stop heating then, when being cooled to 95 ℃, add the water of 4 times of volumes, 85 ℃ boil molten 40min after, filter, filtrate is sodium silicate solution, and filter cake is 1 #Slag.
Sodium silicate solution is heated to 80 ℃, and under the stirring condition, the flow velocity feeding carbon dioxide with 120ml/min drops at 8.5 o'clock until the pH of solution value, filters, and obtains sodium carbonate solution and filter cake.Filter cake can obtain silicon-dioxide powdery that median size be about 15 μ ms at 60 ℃ of following dry 12h through washing after neutral.Sodium carbonate solution generates sodium hydroxide solution and precipitation of calcium carbonate at 70 ℃ of following and calcium oxide reaction 15min.Wherein the mass ratio of calcium oxide and yellow soda ash is 1.2:1.Sodium hydroxide solution and the equal reusable edible of lime carbonate that this process produces.
With the red soil nickel ore fusion behind alkaline purification elimination sodium silicate solution, obtain 1 #Slag mixes with the mass volume ratio (g:ml) of water by 1:40, under temperature is 20 ℃ and stirring condition, feeds carbon dioxide with the flow velocity of 150ml/min, and system pH reaches at 7.5 o'clock, filtering separation, and filtrate is magnesium bicarbonate solution, filter cake is 2 #Slag.Magnesium bicarbonate solution is pyrolysis 100min under 70 ℃ and the stirring condition in temperature, filters, and filter cake obtains magnesiumcarbonate through washing, drying.
With 2 #Slag and concentration are that the sal volatile of 8mol/ml mixes by mass volume ratio (g:ml) 1:6, are under 50 ℃ the condition in temperature, bubbling air while stirring, and reaction 150min filters, and obtains nickel amine complex solution and 3 #Slag.
Nickel amine complex solution 90 ℃ of ammonia still processs, is obtained basic nickel carbonate, and the ammonia of generation and carbonic acid gas return the ammonia soaking system and test through recovery.Basic nickel carbonate is made the nickel oxide product 350 ℃ of calcinings, produce carbonic acid gas and return carbonation process through recovery.

Claims (9)

1. the method from red soil nickel ore extraction nickel oxide is characterized in that comprising the steps:
(1) grinds: red soil nickel ore is ground to below the 80 μ m;
(2) alkaline purification: with levigated red soil nickel ore and alkali reaction, leach the water glass that generates, filter, obtain sodium silicate solution and 1 #Slag;
(3) carbonization is leached: with 1 #Slag and water are by mass volume ratio (g:ml) 1 :～1:50 mixes, and controlled temperature is 15～30 ℃, feeds carbon dioxide with the flow velocity of 50～200ml/min, reaches 7.5～8.0 until the pH of solution value.Filter, obtain magnesium bicarbonate solution and 2 #Slag;
(4) ammonia soaks: with 2 #Slag and concentration are that the sal volatile of 2～8mol/ml mixes, and temperature is under 30～70 ℃ the condition, bubbling air while stirring, reaction 60～240min.Filter, obtain nickel amine complex solution and 3 #Slag;
(5) nickel oxide preparation: nickel ammine solution 90～100 ℃ of ammonia still processs, is obtained basic nickel carbonate, and produce ammonia and carbon dioxide.Basic nickel carbonate makes the nickel oxide product 300～600 ℃ of calcinings.
2. a kind of method of extracting nickel oxide from red soil nickel ore according to claim 1, it is characterized in that step (2) alkaline purification employing fusion alkaline process or alkaline solution lixiviation process, its fusion alkaline process is that red soil nickel ore is mixed by mass ratio 1:2～1:6 with solid NaOH, in temperature is 300～550 ℃, reacts 10～120min under the stirring condition.When system temperature is brought down below 100 ℃, add the water of 2～5 times of volumes, leach 30～60min at 80～90 ℃.
3. a kind of method of extracting nickel oxide from red soil nickel ore according to claim 2, it is characterized in that the alkaline solution lixiviation process is is that 30%～90% sodium hydroxide solution mixes by mass volume ratio (g:ml) 1:2～1:6 with red soil nickel ore and concentration, under being 100～300 ℃ and stirring condition, temperature reacts 30～180min, system temperature is brought down below 100 ℃, add the water dilution of 2～5 times of volumes, continue to leach 20～40min at 80～90 ℃.
4. a kind of method of extracting nickel oxide from red soil nickel ore according to claim 1, it is characterized in that sodium silicate solution that step (2) obtains is under 60～90 ℃ the condition in temperature, feed carbon dioxide while stirring, the content of carbonic acid gas is 20%～90% in the gas, all the other are nitrogen, gas flow is 30～150ml/min, drops to 8.5～9 until the pH value of solution.If foreign matter content height in the sodium silicate solution can transfer to 13 with pH earlier, filtering separation is removed the high precipitation of silica of foreign matter content, and then continuation feeding carbonic acid gas transfers to 8.5～9 with the pH value of solution value.Filter, filtrate is sodium carbonate solution, and filter cake obtains the silicon-dioxide powdery that median size is about 15 μ m at 60～80 ℃ of drying 4～12h.
5. a kind of method of extracting nickel oxide from red soil nickel ore according to claim 1, it is characterized in that the magnesium bicarbonate solution that step (3) obtains stirs 30～180min down at 40～80 ℃, filter, filter cake is through washing, drying obtains magnesiumcarbonate, and the carbon dioxide of generation returns carbonation process through collection.
6. according to claim 1ly a kind ofly extract the method for nickel oxide from red soil nickel ore, it is characterized in that step (3) obtains 2 #Slag reduces with materials such as charcoal, carbon monoxide, hydrogen at 1100～1400 ℃, preparation Rhometal or metallic nickel.
7. a kind of method from red soil nickel ore extraction nickel oxide according to claim 1 is characterized in that in the step (4) 2 #The mass volume ratio of slag and sal volatile (g:ml) is 1:2～1:6.
8. a kind of method from red soil nickel ore extraction nickel oxide according to claim 1 is characterized in that in the step (5) that ammonia that the ammonia still process of nickel ammine solution produces and carbonic acid gas return ammonia and soak operation through water dissolution.The carbonic acid gas that the basic nickel carbonate calcining generates returns carbonation process through collection.
9. a kind of method from red soil nickel ore extraction nickel oxide according to claim 3, the sodium carbonate solution that it is characterized in that obtaining generates sodium hydroxide solution and precipitation of calcium carbonate at 70～90 ℃ of following and calcium oxide reaction 5～20min.Wherein the mass ratio of calcium oxide and yellow soda ash is 1:1～1.5:1.
CNA2008102290499A 2008-11-26 2008-11-26 Method for extracting nickel oxide from lateritic nickel Pending CN101423897A (en)

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CN102080159A (en) * 2011-01-07 2011-06-01 东北大学 Method for comprehensive exploitation and utilization of silicon, magnesium, iron, and nickel in laterite-nickel ore
CN103274483A (en) * 2013-06-06 2013-09-04 重庆莘然高分子材料有限公司 Technology for recovering nickel from nickel coating stripping waste liquid
CN103274483B (en) * 2013-06-06 2016-01-13 重庆莘然高分子材料有限公司 The nickel recovery process of nickel coating strip waste liquid
CN105483381A (en) * 2015-11-26 2016-04-13 辽宁科技大学 Comprehensive utilization method of nickel and iron slags
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CN106086467A (en) * 2016-08-09 2016-11-09 江苏省冶金设计院有限公司 A kind of method and system utilizing lateritic nickel ore to extract nickel oxide
CN106086469A (en) * 2016-08-09 2016-11-09 江苏省冶金设计院有限公司 A kind of method and system utilizing lateritic nickel ore to extract nickel oxide
CN106119573A (en) * 2016-08-09 2016-11-16 江苏省冶金设计院有限公司 A kind of method and system utilizing lateritic nickel ore to extract nickel oxide
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CN106868309A (en) * 2017-03-24 2017-06-20 江苏省冶金设计院有限公司 The system and method for Treatment of Copper iron powder
CN106898504A (en) * 2017-05-05 2017-06-27 孝感双华应用科技开发有限公司 A kind of preparation method of the nano composite material based on Graphene
CN108588416A (en) * 2018-05-21 2018-09-28 江西铜业集团有限公司 A method of deep oxidation removes iron cobalt from nickel salt
WO2022077112A1 (en) * 2020-10-14 2022-04-21 The University Of British Columbia Concerted mineral carbonation and selective leaching of laterites
CN112723428A (en) * 2020-12-18 2021-04-30 湖南德景源科技有限公司 Method for preparing battery-grade nickel oxide by using metallic nickel
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