CN101338376A - Process for comprehensively developing and utilizing nickel, cobalt, iron and magnesium from laterite-nickel ore - Google Patents
Process for comprehensively developing and utilizing nickel, cobalt, iron and magnesium from laterite-nickel ore Download PDFInfo
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Abstract
The invention relates to a method for compressively developing and utilizing nickel and cobalt in a lateritic nickel ore. The lateritic nickel ore is used as the raw material; the technical flows of mining, defibrination and ore preparation, pressurizing and wet chlorinating extraction, separating the nickel (cobalt) and iron by extraction, hydrolyzing magnesium chloride with a high temperature, magnetizing and roasting the extracted slag, magnetically separating, etc., and the like, are adopted to extract the middle product of the nickel and cobalt, recycle the light magnesium chloride and the materials used for pudding. The invention is mainly characterized in that the nickel and cobalt in the lateritic nickel ore is firstly and selectively dissolved and extracted by using the pressurized muriatic acid; a depositing method is used on the nickel and cobalt in a liquid to obtain the middle product; the mother liquid after the nickel is deposited is hydrolyzed by high temperature to obtain the light magnesium chloride and the chlorine hydride is recycled to obtain the muriatic acid; a material used for pudding is obtained after the extracted slag is reduced, magnetized, roasted and weakly separated in a magnetic way; the recycling muriatic acid enters the working period of extraction, thereby leading the muriatic acid to closely circulate. The method of the invention comprehensively recycles nickel and cobalt, magnesium and iron and has the advantages of high nickel and cobalt extraction rate, low cost, less investment and closed muriatic acid circulation. The whole technique is simple, clean, environmental friendly and is applicable for industrial production with large scale in particular.
Description
Technical field
The invention belongs to a kind of wet chlorination method in non-ferrous metal hydrometallurgy field and from red soil nickel ore, extract the nickel cobalt, and fully utilize the processing method of magnesium, iron, especially a kind of method of handling low-grade red soil nickel ore, comprehensive utilization valuable metal.
Background technology
The nickel resources type is divided into nickel sulfide ore and nickel oxide ore two classes usually.From world wide, about 70% nickel is to extract from nickel sulfide ore at present, exists the nickel in the oxidized ore to account for 65～70% of total reserves but compose.Along with the minimizing gradually of nickelous sulfide resource and higher-grade red soil nickel ore resource, the economic development of a large amount of red soil nickel ores of grade about 1% that exist is paid close attention to by people day by day.
Different according to iron in ore and Mg content, nickel-bearing laterite is divided into limonite type and eluvial ore type simply.It is higher that general eluvial ore type nickel oxide ore contains magnesium, and limonite type nickel laterite iron content is higher and to contain magnesium lower.
Aspect the red soil nickel ore processing, the smelting process of comparative maturity comprises: rotary kiln preliminary reduction process-electric furnace smelting process (RKEF), sintering-blast furnace sulfiding smelting method, sintering-blast furnace smelting method, reduction roasting-ammonia leaching method and high pressure pickling process etc.In addition, dump leaching method, hydroxyl method, chlorination water seaoning, chloride volatility process, chlorination segregation process etc. also have small-scale production or carry out overtesting research.Above treatment process all has adaptability separately, need be according to the difference of the ore type of ore nickel, cobalt contents, and the supply situation of indigenous fuel, water, electricity and chemical etc. is different, selects suitable smelting process for use.From in general, the processing of nickel oxide ore mainly is divided into two kinds of pyrometallurgy and hydrometallurgys, in the aforesaid method, rotary kiln preliminary reduction process-electric furnace smelting process (RKEF), sintering-blast furnace sulfiding smelting method, sintering-blast furnace smelting method are the pyrometallurgical smelting method, and reduction roasting-ammonia leaching method and high pressure pickling process, dump leaching method etc. are Wet-smelting method.
According to existing treatment process, the nickeliferous high ore deposit of pyrogenic attack to obtain Rhometal, fully utilizes nickel and iron in the laterite, and wet processing can be used for handling nickeliferous lower ore deposit, with chemistry or the metallurgic product that obtains nickel and cobalt.
In the laterite to mainly contain with metal ingredient be nickel, cobalt, magnesium, iron and silicon, in the low ore grade nickel laterite, nickel and cobalt total amount only have about 1%, and silicon, iron and magnesium account for the major portion that the ore deposit is formed.It is low that the magnesium iron ratio in dissimilar ore deposits has height to have, and magnesium iron is lower in the limonite type laterite, and eluvial ore type laterite magnesium iron is than higher.The general Wet-smelting method of a kind of economy of this process exploitation is handled low-grade laterite, comprehensive utilization nickel, cobalt, magnesium and iron.
Summary of the invention
The prior art versatility is strong in order to overcome, comprehensive utilization of resources deficiency etc., the invention provides a kind of less investment, comprehensive utilization of resources, the mineral scope of application is wide, technology is succinct, energy consumption is low, production cost is low, acid and closed circuit the following of water do not produce pollution, the method for nickel cobalt, iron and magnesium comprehensive development and utilization in environmentally friendly, as the to adapt to scale operation red soil nickel ore.
The present invention realizes by following technical proposal, comprises following processing step;
(1) salt acidleach ore deposit: ore pulp is made in ore reduction, and ore pulp enters the nickel in the ore, cobalt, magnesium in the leach liquor with muriate with the hydrochloric acid agitation leach of heating of pressurizeing, and iron is suppressed in the leached mud; It is at pressure 0.35～0.5MPa that described pressurization is heated; 150～165 ℃ of temperature; Concentration is not less than hydrochloric acid soln and the ore weight ratio (acid material ratio) 1.2～1.5: 1 of 28%HCl;
(2) leach liquor and leached mud solid-liquid separation are made ball reduction magnetizing roasting with leached mud, through broken, magnetic concentration iron, are used for ironmaking;
(3) leach liquor adopts the extraction agent extraction to obtain ferruginous organic phase, reaches nickel cobalt, magnesium aqueous chloride solution; The ferric chloride Solution that back extraction obtains from extracted organic phase, mother liquor after neutralization precipitation, solid-liquid separation get ironic hydroxide, precipitated iron;
(4) with nickel cobalt, magnesium aqueous chloride solution neutralization precipitation nickel hydroxide cobalt: solid-liquid separation gets mother liquor behind nickel hydroxide cobalt, the coprecipitated nickel hydroxide cobalt; The nickel cobalt is separated with magnesium;
(5) mother liquor behind mother liquor, the coprecipitated nickel hydroxide cobalt after the precipitated iron of gained in (3) step, (4) step is merged, through concentrate, roasting, hydrogenchloride; Hydrogenchloride obtains regeneration hydrochloric acid after water absorbs;
(6) hydrogenchloride is regenerated return salt acidleach mine order after the hydrochloric acid adjustment, realize the closed cycle of hydrochloric acid.
In described (1) step, the ore pulp process made in ore reduction be: to the ore of extraction carry out fragmentation (preferably be crushed to-30mm), when the ore water content be suitable for less than 15% the time do broken, when the ore water content is suitable for greater than 15% the time wet broken; The liquid-solid ratio that adds the water mill slurry is 1～2: 1, and slurry is crossed 100 mesh sieves.
In described (1) step, leach and to carry out in the leaching vat that pressurization is heated, total liquid and solid weight ratio (being liquid-solid ratio) are 3: 1～4: 1 in the moisturizing control material; Extraction time 0.5～2 hour.
Described (3), (4) step in, the present invention preferably adopts light magnesium oxide to do the neutralization precipitation agent, after the precipitated iron behind mother liquor, the coprecipitated nickel hydroxide cobalt mother liquor be magnesium chloride solution; Thereby roasting is a pyrohydrolysis in (5) step, then obtains light magnesium oxide and hydrogenchloride, and resulting light magnesium oxide then continues as the neutralization precipitation agent.
Described (2) make ball in the step be that moisture leached mud, compound binding agent, reductive agent are mixed, and manufacture 5～10mm green-ball grain; Compound binding agent is 80% Sodium salts humic acids+10% unslaked lime+10% yellow soda ash, and the amount of allocating into is 2～3% of a leached mud dry measure; Reductive agent is charcoal, hard coal, bituminous coal or brown coal
The preferred bituminous coal of the present invention is reductive agent, and making the ball amount of allocating into is 6～10% of leached mud dry weight.
The reduction magnetizing roasting is carried out in rotary kiln in described (2) step; 700～750 ℃ of maturing temperatures; Roasting time 30～40 minutes.
The ripe ball warp fragmentation, the ball milling that obtain after the reduction magnetizing roasting in described (2) step, and cross 200 mesh sieves;-200 powder material magnetic separation low intensity magnetic separation machines; Magnetic separation magneticstrength 80～100 teslas; Magnetic separation product control iron level 55～65%.
Extraction iron extraction agent is neutral organic phosphine (as TBP) or amine (as N235, N503 etc.) compound
It is 25%N235+10% glycerol+kerosene with extraction agent preferably that the present invention extracts iron.
Extracting operation chamber type extraction apparatus (mixer-settler) or vertical extraction equipment extraction tower); Adopt counter-current extraction and countercurrent reextraction is got, normal temperature operation down; Effectively extraction progression is 3～5 grades, and extraction phase is than O/A=1: 2～3; Effectively reextraction progression is 3～5 grades, strips and compares O/A=2.5～3: 1.Iron clearance 〉=99%.
In described (3) step, the anti-stripping agent of extraction deironing is an Acidic Ferric Chloride Solution, is the neutralization precipitation agent with light magnesium oxide, and with ironic hydroxide form precipitation, ferric chloride Solution is converted into magnesium chloride solution with iron; The neutralization precipitation condition is: 15 (normal temperature)～60 ℃ add light magnesium oxide at a slow speed, control terminal point pH6.0～7.0.Iron deposition rate 〉=99%.Ironic hydroxide can go into to make the roasting of ball reduction roastingization, also can be used for producing other iron products; Magnesium chloride solution is gone into pyrohydrolysis (roasting).
In described (4) step is the neutralization precipitation agent with the light magnesium oxide, and nickel cobalt in the surplus liquid of extraction of extraction deironing is precipitated with hydroxide form; Deposition condition is: 15 (normal temperature)～60 ℃ add light magnesium oxide at a slow speed, control terminal point pH9.5～10.0.Nickel cobalt deposition rate 〉=98%.
In described (5) step, the magnesium chloride solution through merging is through evaporation concentration, and being adjusted to chloride content is 220 ± 30g/L.
The main technologic parameters of magnesium chloride roasting and regeneration of hydrochloric acid:
A, magnesium chloride solution Cl total content (free state+chemical combination attitude) 220 ± 30g/l
B, stoving oven throat temperature: 360～440 ℃
C, stoving oven fire box temperature: 650～750 ℃
D, Venturi preconcentrator temperature: 90 ℃
E, absorption tower temperature: 85-90 ℃
Regenerating acid HCl total content is 280 ± 30g/l.
Solid-liquid separation in the above-mentioned steps can be used with in the filters such as thickener, Hhigh-efficient thickener, flame filter press, vacuum filter, band filter one or more.
The magnesium chloride roasting can be adopted in sulfuration bed process, spray roasting technology, the spent acid distillation and technology such as oxidizing process; The present invention recommends to use spray roasting technology.
The present invention is directed to that the red soil nickel ore grade is low, the characteristics of the occurrence status complexity of nickel, provide a kind of scheme complete, help the circulation of material, save the method for nickel cobalt, iron and magnesium comprehensive development and utilization in the red soil nickel ore of cost.It is fast that this method compared with prior art has leaching velocity, nickel cobalt leaching yield height, and iron, magnesium comprehensive utilization, hydrochloric acid can be realized advantages such as recycle, and Technology, equipment, economy and environmental protection aspect can both meet big industrial production requirement.Thereby treatment process of the present invention also is effectively to extract the optimum process method of nickel cobalt from red soil nickel ore.
Advantage of the present invention and positively effect are as follows:
1, the high-recovery of nickel cobalt;
2, the scope of application to mineral is big;
3, recyclable magnesium, iron are realized comprehensive utilization of resources.
4, the unit metal is invested little and is adapted to scale operation especially;
5, flow process is succinct, cost is low;
6, hydrochloric acid (HCl) regeneration, closed cycle;
7, water closed cycle;
8, produce certainly in neutralizing agent (magnesium) flow process;
Description of drawings
Accompanying drawing is a process flow sheet of the present invention.
Embodiment
Below in conjunction with concrete enforcement the present invention is described further.The present invention can implement by arbitrary mode of summary of the invention.Providing of these embodiment limits the present invention anything but.
Embodiment is respectively with the valency that the mainly contains metal content in the red soil nickel ore: Ni 0.92%; Co 0.07%; Mg 14.21%; Fe 19.36%.Through coarse breaking.
Embodiment 1
A. add water by material-water ratio 1: 1 (wt) the red soil nickel ore ball milling is also crossed 100 mesh sieves.Get-100 order slurries and pump in the pressure reactor, by liquid-solid ratio 3.0: 1, acid material (weight) than being respectively to pump into water and hydrochloric acid (HCl content is more than 28%), agitation leach at 1.2: 1.
B. leaching condition control: agitation leach is 0.5 hour under 165 ℃ (pressure is not more than 0.5MPa).
C. filtered while hot, residue is washed.The comprehensive leaching yield of valuable metal is respectively: Ni+Co 92.1%; Mg 94.6%; Fe 3.1%.
Embodiment 2
A. add water by material-water ratio 1: 2 (wt) the red soil nickel ore ball milling is also crossed 100 mesh sieves.Get-100 order slurries and pump in the pressure reactor, by liquid-solid ratio 4.0: 1, acid material (weight) than being respectively to pump into water and hydrochloric acid (HCl content is more than 28%), agitation leach at 1.5: 1.
B. leaching condition control: agitation leach is 2 hours under 150 ℃ (pressure is greater than 0.35MPa).
C. filtered while hot, residue is washed.The comprehensive leaching yield of valuable metal is respectively: Ni+Co 91.4%; Mg 95.2%; Fe 5.7%.
Leach red soil nickel ore through the hydrochloric acid pressurization, leach liquor nickel cobalt contents (g/L) is respectively: Ni+Co 2.27; Mg 33.5Fe2.16; Leach liquor acidity is: H
+0.82mol/L.Following embodiment is based on this leach liquor.
Leached mud (doing) valuable metal composition (%) is: Ni 0.04; Co～0.01; Mg 0.63; Fe 22.6.Leached mud moisture 17.2%.Following embodiment is based on this leached mud.
Embodiment 3
A. make ball: moisture leached mud, compound binding agent, reductive agent are mixed, and with garden pan-type pelletizer granulation.Compound binding agent is 80% Sodium salts humic acids+10% unslaked lime+10% yellow soda ash, and the amount of allocating into is 3% of a leached mud dry measure; Reductive agent is a bituminous coal, and the amount of allocating into is 10% of a leached mud dry measure.
B. magnetizing roasting: green-ball is gone in the reducing roasting rotary kiln, 700 ℃ of maturing temperatures, roasting time 40 minutes.
C. magnetic separation: reduce ripe ball warp fragmentation, ball milling, and cross 200 mesh sieves;-200 powder materials carry out magnetic separation with the low intensity magnetic separation machine, magnetic separation magneticstrength 100 teslas; Magnetic separation product iron level 58.4%; Iron yield 76.3%.
Embodiment 4
A. make ball: moisture leached mud, compound binding agent, reductive agent are mixed, and with garden pan-type pelletizer granulation.Compound binding agent is 80% Sodium salts humic acids+10% unslaked lime+10% yellow soda ash, and the amount of allocating into is 2% of a leached mud dry measure; Reductive agent is a bituminous coal, and the amount of allocating into is 6% of a leached mud dry measure.
B. magnetizing roasting: green-ball is gone in the reducing roasting rotary kiln, 750 ℃ of maturing temperatures, roasting time 30 minutes.
C. magnetic separation: reduce ripe ball warp fragmentation, ball milling, and cross 200 mesh sieves;-200 powder materials carry out magnetic separation with the low intensity magnetic separation machine, magnetic separation magneticstrength 80 teslas; Magnetic separation product iron level 62.5%; Iron yield 72.6%.
Embodiment 5
A. leach liquor is with 25%N235+10% glycerol+kerosene extraction deironing: strip with 3 grades of extractions, 5 grades and connect, normal temperature is finished drilling, and extraction phase is than O/A=1: 2, and O/A=3 is compared in reextraction: 1.Iron clearance 99.6%.
B. anti-stripping agent (iron(ic) chloride) is gone into stirred tank, neutralization precipitation iron under the normal temperature.The neutralization precipitation agent is a light magnesium oxide, and add-on is decided on terminal point pH, control terminal point pH～6.0, iron deposition rate 99.2%.
C. extract surplus liquid (nickel cobalt, magnesium muriate) and go into stirred tank, 60 ℃ of following neutralization precipitation nickel cobalts.The neutralization precipitation agent is a light magnesium oxide, and add-on is decided on terminal point pH, control terminal point pH～10.0, nickel cobalt deposition rate 98.4%.
Embodiment 6
D. leach liquor is with 25%N235+10% glycerol+kerosene extraction deironing: strip with 5 grades of extractions, 3 grades and connect, normal temperature is finished drilling, and extraction phase is than O/A=1: 3, and O/A=2.5 is compared in reextraction: 1.Iron clearance 99.2%.
E. anti-stripping agent (iron(ic) chloride) is gone into stirred tank, 60 ℃ of following neutralization precipitation iron.The neutralization precipitation agent is a light magnesium oxide, and add-on is decided on terminal point pH, control terminal point pH～7.0, iron deposition rate 99.4%.
F. extract surplus liquid (nickel cobalt, magnesium muriate) and go into stirred tank, neutralization precipitation nickel cobalt under the normal temperature.The neutralization precipitation agent is a light magnesium oxide, and add-on is decided on terminal point pH, control terminal point pH～9.5, nickel cobalt deposition rate 98.7%.
Embodiment 7
A sinks the nickel mother liquor, is adjusted to Cl total amount 250g/l through concentrating.
650 ℃ of the constant tubular type vertical furnace of B bore temperatures; Adjusted mother liquor is introduced furnace roof portion's nozzle and be sprayed in the stove pyrohydrolysis of metal chloride in the realization mother liquor.
C draws furnace gas from furnace roof, and water absorbs to the water; Come out of the stove 370～390 ℃ of furnace gas temperatures, the water temperature that absorbs furnace gas rises to 85-90 ℃; Furnace gas is emptying behind multistage absorption.
D absorbs from the first step and obtains the hydrochloric acid that HCl content reaches 304g/L.
Embodiment 8
A sinks the nickel mother liquor, is adjusted to Cl total amount 190g/l through concentrating.
750 ℃ of the constant tubular type vertical furnace of B bore temperatures; Adjusted mother liquor is introduced furnace roof portion's nozzle and be sprayed in the stove pyrohydrolysis of metal chloride in the realization mother liquor.
C draws furnace gas from furnace roof, and water absorbs to the water; Come out of the stove 420～430 ℃ of furnace gas temperatures, the water temperature that absorbs furnace gas rises to 85-90 ℃; Furnace gas is emptying behind multistage absorption.
D absorbs from the first step and obtains the hydrochloric acid that HCl content reaches 291g/L.
Claims (16)
1, the method for nickel cobalt, iron and magnesium comprehensive development and utilization in the red soil nickel ore is characterized in that, comprises following processing step:
(1) salt acidleach ore deposit: ore pulp is made in ore reduction, and ore pulp enters the nickel in the ore, cobalt, magnesium in the leach liquor with muriate with the hydrochloric acid agitation leach of heating of pressurizeing, and iron is suppressed in the leached mud; It is at pressure 0.35～0.5MPa that described pressurization is heated; 150～165 ℃ of temperature; Concentration is not less than hydrochloric acid soln and the ore weight ratio 1.2～1.5: 1 of 28%HCl;
(2) with the leach liquor and the leached mud solid-liquid separation that obtain in (1) step, leached mud is made ball reduction magnetizing roasting, through broken, magnetic concentration iron, be used for ironmaking;
(3) leach liquor adopts the extraction agent extraction to obtain ferruginous organic phase, reaches nickel cobalt, magnesium aqueous chloride solution; The ferric chloride Solution that back extraction obtains from extracted organic phase, mother liquor after neutralization precipitation, solid-liquid separation get ironic hydroxide, precipitated iron;
(4) at nickel cobalt, magnesium aqueous chloride solution neutralization precipitation nickel hydroxide cobalt: mother liquor after solid-liquid separation gets nickel hydroxide cobalt, coprecipitated nickel hydroxide cobalt;
(5) mother liquor behind mother liquor, the coprecipitated nickel hydroxide cobalt after the precipitated iron of gained in (3) step, (4) step is merged, through concentrate, roasting, hydrogenchloride; Hydrogenchloride obtains regeneration hydrochloric acid after water absorbs;
(6) hydrogenchloride is regenerated return salt acidleach mine order after the hydrochloric acid adjustment, realize the closed cycle of hydrochloric acid.
2, the method for nickel cobalt, iron and magnesium comprehensive development and utilization in the red soil nickel ore according to claim 1, it is characterized in that: in described (1) step, leaching is carried out in the leaching vat that pressurization is heated, and total liquid and solid weight ratio are 3: 1～4: 1 in the moisturizing control material; Extraction time 0.5～2 hour.
3, the method for nickel cobalt, iron and magnesium comprehensive development and utilization in the red soil nickel ore according to claim 1 and 2, it is characterized in that: described (3), (4) are in the step, adopt light magnesium oxide to do the neutralization precipitation agent, after the precipitated iron behind mother liquor, the coprecipitated nickel hydroxide cobalt mother liquor be magnesium chloride solution.
4, the method for nickel cobalt, iron and magnesium comprehensive development and utilization in the red soil nickel ore according to claim 3 is characterized in that: described (5) one-step baking, then obtain light magnesium oxide and hydrogenchloride, and resulting light magnesium oxide then continues as the neutralization precipitation agent.
5, the method for nickel cobalt, iron and magnesium comprehensive development and utilization in the red soil nickel ore according to claim 1 is characterized in that: described (2) make ball in the step be that moisture leached mud, compound binding agent, reductive agent are mixed, and manufacture 5～10mm green-ball grain; Compound binding agent is 80% Sodium salts humic acids+10% unslaked lime+10% yellow soda ash, and the amount of allocating into is 2～3% of a leached mud dry measure; Reductive agent is charcoal, hard coal, bituminous coal or brown coal
6, the method for nickel cobalt, iron and magnesium comprehensive development and utilization in the red soil nickel ore according to claim 5, it is characterized in that: bituminous coal is reductive agent, making the ball amount of allocating into is 6～10% of leached mud dry weight.
7, according to the method for nickel cobalt, iron and magnesium comprehensive development and utilization in claim 1 or the 5 or 6 described red soil nickel ores, it is characterized in that: the reduction magnetizing roasting is carried out in rotary kiln in described (2) step; 700～750 ℃ of maturing temperatures; Roasting time 30～40 minutes.
8, the method for nickel cobalt, iron and magnesium comprehensive development and utilization in the red soil nickel ore according to claim 7 is characterized in that: the ripe ball warp fragmentation, the ball milling that obtain after the reduction magnetizing roasting in described (2) step, and cross 200 mesh sieves;-200 powder material magnetic separation low intensity magnetic separation machines; Magnetic separation magneticstrength 80～100 teslas; Magnetic separation product control iron level 55～65%.
9, the method for nickel cobalt, iron and magnesium comprehensive development and utilization in the red soil nickel ore according to claim 7 is characterized in that: extraction iron extraction agent is neutral organic phosphine or aminated compounds
10, according to the method for nickel cobalt, iron and magnesium comprehensive development and utilization in claim 1 or the 9 described red soil nickel ores, it is characterized in that: extraction iron extraction agent is 25%N235+10% glycerol+kerosene.
11, according to the method for nickel cobalt, iron and magnesium comprehensive development and utilization in claim 1 or the 8 or 9 described red soil nickel ores, it is characterized in that: extracting operation is with chamber type extraction apparatus or vertical extraction equipment; Adopt counter-current extraction and countercurrent reextraction is got, normal temperature operation down; Effectively extraction progression is 3～5 grades, and extraction phase is than O/A=1: 2～3; Effectively reextraction progression is 3～5 grades, strips and compares O/A=2.5～3: 1.
12, the method for nickel cobalt, iron and magnesium comprehensive development and utilization in the red soil nickel ore according to claim 1, it is characterized in that: in described (3) step, the anti-stripping agent of extraction deironing is an Acidic Ferric Chloride Solution, with light magnesium oxide is the neutralization precipitation agent, with ironic hydroxide form precipitation, ferric chloride Solution is converted into magnesium chloride solution with iron; The neutralization precipitation condition is: 15～60 ℃, add light magnesium oxide at a slow speed, control terminal point pH6.0～7.0.
13, the method for nickel cobalt, iron and magnesium comprehensive development and utilization in the red soil nickel ore according to claim 1 is characterized in that: in described (4) step is the neutralization precipitation agent with the light magnesium oxide, and nickel cobalt in the surplus liquid of extraction of extraction deironing is precipitated with hydroxide form; Deposition condition is: 15～60 ℃, add light magnesium oxide at a slow speed, control terminal point pH9.5～10.0.
14, the method for nickel cobalt, iron and magnesium comprehensive development and utilization in the red soil nickel ore according to claim 1 is characterized in that: in described (5) step, the magnesium chloride solution through merging is through evaporation concentration, and being adjusted to chloride content is 220 ± 30g/L.
15, the method for nickel cobalt, iron and magnesium comprehensive development and utilization in the red soil nickel ore according to claim 1 is characterized in that: the main technologic parameters of magnesium chloride roasting and regeneration of hydrochloric acid:
A, magnesium chloride solution Cl total content (free state+chemical combination attitude) 220 ± 30g/l
B, stoving oven throat temperature: 360～440 ℃
C, stoving oven fire box temperature: 650～750 ℃
D, Venturi preconcentrator temperature: 90 ℃
E, absorption tower temperature: 85-90 ℃
Regenerating acid HCl total content is 280 ± 30g/l.
16, the method for nickel cobalt, iron and magnesium comprehensive development and utilization in the red soil nickel ore according to claim 1, it is characterized in that: in described (1) step, the ore pulp process is made in ore reduction is: the ore to extraction carries out fragmentation, when the ore water content be suitable for less than 15% the time do broken, when the ore water content is suitable for greater than 15% the time wet broken; The liquid-solid ratio that adds the water mill slurry is 1～2: 1, and slurry is crossed 100 mesh sieves, uses for leaching.
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2008
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| CN112593080A (en) * | 2020-12-21 | 2021-04-02 | 北京博萃循环科技有限公司 | Method for treating laterite-nickel ore by combination of pyrogenic process and wet process |
| CN114774685A (en) * | 2022-04-24 | 2022-07-22 | 酒泉钢铁(集团)有限责任公司 | Method for treating limonite type laterite-nickel ore hydrometallurgy slag |
| CN115261606A (en) * | 2022-08-06 | 2022-11-01 | 江西理工大学 | Process for preparing high-emissivity multielement doped rare earth ferrite by comprehensively utilizing laterite-nickel ore |
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