CN103667726B - Method for processing nickle-containing residual ores - Google Patents
Method for processing nickle-containing residual ores Download PDFInfo
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- CN103667726B CN103667726B CN201410014471.8A CN201410014471A CN103667726B CN 103667726 B CN103667726 B CN 103667726B CN 201410014471 A CN201410014471 A CN 201410014471A CN 103667726 B CN103667726 B CN 103667726B
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Abstract
The invention discloses a method for processing nickle-containing residual ores. The method comprises the following steps of dividing the nickle-containing residual ores into magnesium ores and iron ores; carrying out leaching processing on the iron ores by utilizing sulfuric acid so as to obtain lixivium containing ferric sulfate, wherein content of free acid in the lixivium containing ferric sulfate is 40 to 45g/L; at a temperature of 85 to 98 DEG C, carrying out primary neutralizing treatment on the lixivium containing ferric sulfate by utilizing the magnesium ores so as to reduce the content of the free acid in the lixivium to 5g/L; at a temperature of 85 to 98 DEG C, carrying out secondary neutralizing treatment on the lixivium subjected to primary neutralizing treatment by utilizing a first neutralizer so as to keep the pH of the lixivium subjected to primary neutralizing treatment in the range of 1.0 to 2.5; and carrying out tertiary neutralizing treatment on the lixivium subjected to secondary neutralizing treatment by utilizing a second neutralizer and filtering so as to obtain high-iron filter residues and the lixivium containing nickel and cobalt. By utilizing the method, valued metals in the nickle-containing residual ores can be effectively recovered.
Description
Technical field
The present invention relates to field of metallurgy, be specifically related to the method for nickel-containing eluvial ore process.
Background technology
When carrying out sulfuric acid leaching process to nickel-containing eluvial ore, while the stripping of the valuable metal such as nickel, cobalt, the impurity such as a large amount of iron and magnesium also can stripping simultaneously.In metallurgy industry, usually adopt Jarosite process deironing, in brief, by introducing sodium ion in leach liquor, control ph at about 1.1-1.2, thus generates yellow modumite method, to reach the object of deironing.But the scum that Jarosite process deironing produces causes because iron content low sulfur-bearing height slag is loose and is difficult to use in the such as industry such as cement, building materials.Cause a large amount of slag muck to deposit, not only occupy a large amount of soil, also potentially contaminated is caused to environment.
Thus, the method for process nickel-containing eluvial ore still haves much room for improvement at present.
Summary of the invention
The present invention one of is intended to solve the problems of the technologies described above at least to a certain extent or at least provides a kind of useful business to select.For this reason, the object of the invention is to propose both effectively to process nickel-containing eluvial ore, again can Appropriate application nickel-containing eluvial ore, while increasing enterprise's income, the nickel-containing eluvial ore treatment process of environmental pollution can be reduced again.
Thus, the present invention proposes a kind of process nickel-containing eluvial ore method.According to embodiments of the invention, the method comprises the following steps: described nickel-containing eluvial ore to be divided into magnesia ore deposit and irony ore deposit; Utilize sulfuric acid to carry out leaching process to described irony ore deposit, to obtain the leach liquor containing ferric sulfate, wherein, the content of the described leach liquor Free Acid containing ferric sulfate is 40 ~ 45g/L; At the temperature of 85 ~ 98 degrees Celsius, described magnesia ore deposit is utilized to carry out the first neutralizing treatment, the content of described leach liquor Free Acid is down to 5g/L to the described leach liquor containing ferric sulfate; At the temperature of 85 ~ 98 degrees Celsius, the first neutralizing agent is utilized to carry out the second neutralizing treatment to the leach liquor through the first neutralizing treatment, the pH of the described leach liquor through the first neutralizing treatment is maintained 1.0 ~ 2.5; And utilize the second neutralizing agent carry out the 3rd neutralizing treatment to the leach liquor through the second neutralizing treatment and filter, to obtain high ferro filter residue and the leach liquor containing nickel cobalt.By the method, effectively can remove the iron containing compounds in nickel-containing eluvial ore, and the filter residue of high ferro height silicon can be obtained.High ferro height silicon filter residue, slag is good, can be widely used in brickmaking, the industries such as cement.Nickel liquid in addition after purification can continue to reclaim the product such as nickel, cobalt.Therefore, the method for nickel minerals is remained in the new process that the present invention proposes, and not only decreases metal smelting generation waste residue and causes secondary pollution to environment, and greatly improve utilization of resources.
According to embodiments of the invention, the method can also have following additional technical feature:
In one embodiment of the invention, the magnesium of 18 ~ 20 % by weight is contained in described magnesia ore deposit.Thus, the efficiency utilizing magnesia ore deposit to carry out the first neutralizing treatment can be improved further, thus improve the efficiency of process nickel-containing eluvial ore further.
In one embodiment of the invention, described first neutralizing agent and described second neutralizing agent are independently for being selected from oxide compound, oxyhydroxide or the carbonate one of at least of magnesium, nickel and cobalt.Thus, the efficiency of the second neutralizing treatment and the 3rd neutralizing treatment can be improved further.
In one embodiment of the invention, one of at least the carrying out containing under oxygen atmosphere of described first neutralizing treatment and described second neutralizing treatment.Thus, in the process of neutralizing treatment, ferrous ion can be converted into ferric ion, thus de-ironing efficiency can be improved further.In one embodiment of the invention, the described oxygen atmosphere that contains is provided by pure oxygen or air.Thus, can improve further and ferrous iron is converted into ferric efficiency, thus de-ironing efficiency can be improved further.
In one embodiment of the invention, one of at least the carrying out at ambient pressure of described first neutralizing treatment, the second neutralizing treatment and the 3rd neutralizing treatment.Thus, the safety performance of the method can be improved, reduce equipment investment, thus reduce the implementation cost of the method.
In one embodiment of the invention, before the 3rd neutralizing treatment is carried out to the leach liquor through the second neutralizing treatment, filtration washing is carried out to the described leach liquor through the second neutralizing treatment, to obtain filtrate and high ferro height silicon filter residue; And obtained filtrate is carried out the 3rd neutralizing treatment.Thus, can realize the recovery to high ferro height sial slag, contriver finds, the content of silicon-dioxide in high ferro height sial slag is the iron of 55 ~ 60 % by weight and about 20%, thus is suitable as building materials industry material.
In one embodiment of the invention, in the first neutralizing treatment and the second neutralizing treatment process one of at least, with the stirring velocity of 250rpm in and system stir.Thus, the efficiency of neutralization reaction can be improved further, thus improve the processing efficiency to nickel-containing eluvial ore further.
In one embodiment of the invention, comprise further and described filter residue after the 3rd neutralizing treatment and described irony ore deposit are carried out leaching process.Thus, filter residue can be returned leaching treatment step, realize the circular treatment to filter residue, thus can de-ironing efficiency be improved, and efficient recovery is carried out to the nickel cobalt residued in filter residue.
In one embodiment of the invention, comprise the step reclaiming nickel and cobalt from described nickel and cobalt containing leach liquor further, thus, effectively can obtain nickel cobalt metal.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the schematic flow sheet of the method processing nickel-containing eluvial ore according to an embodiment of the invention.
Fig. 2 is the schematic flow sheet of the method processing nickel-containing eluvial ore in accordance with another embodiment of the present invention.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
Similar terms such as used in this article " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, one or more these features can be expressed or impliedly be comprised to the feature being limited with " first ", " second " etc.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
Below with reference to Fig. 1, the method for the process nickel-containing eluvial ore according to the embodiment of the present invention is described.As shown in Figure 1, the method for process nickel-containing eluvial ore of the present invention can comprise:
S100: sulfuric acid leaching process is carried out to irony ore deposit
Before carrying out sulfuric acid leaching process to nickel-containing eluvial ore, need nickel-containing eluvial ore to be divided into magnesia ore deposit and irony ore deposit.Then, sulfuric acid is utilized to carry out leaching process to irony ore deposit, to obtain the leach liquor containing ferric sulfate.According to embodiments of the invention, the content of the leach liquor Free Acid containing ferric sulfate can be 40 ~ 45g/L.In this article, the term " magnesia ore deposit " used refers to the ore that in nickel-containing eluvial ore, Mg content is higher, and usual Mg content is about 16%, in this article, the term " irony ore deposit " used refers to the ore that in nickel-containing eluvial ore, iron level is higher, and usual iron level is 25 ~ 30%.Those skilled in the art can adopt any known method, distinguish magnesia ore deposit and irony ore deposit.Such as, according to embodiments of the invention, can be sieved by the mixture of granularity to magnesia ore deposit and irony ore deposit and obtain magnesia ore deposit and irony ore deposit respectively.
According to embodiments of the invention, be beneficial to sulfuric acid and the mode of process carried out leaching in irony ore deposit and is not particularly limited.Those skilled in the art can adopt any known method to carry out sulfuric acid leaching process.According to embodiments of the invention, before sulfuric acid leaching process is carried out in irony ore deposit, in advance irony ore deposit can be pulverized, such as, irony ore deposit can be carried out being crushed to the particle that granularity is not more than 75 microns (200 orders) and account for more than 95 % by weight.By after broken for irony breeze, the irony ore deposit through pulverizing can be mixed with sulfuric acid.The concentration of sulfuric acid here is also not particularly limited.According to embodiments of the invention, can adopt sulphuric acid soln, such as concentration is the sulphuric acid soln of 93 ~ 98%.
In sulfuric acid leaching reaction, sulfuric acid can with the metallic element generation chemical reaction in irony ore deposit, mainly as follows:
NiO+H
2SO
4=NiSO
4+H
2O
2FeOOH+3H
2SO
4=Fe
2(SO
4)
3+4H
2O
Thus, the metal ion containing above-mentioned leaching in obtained leach liquor, wherein higher with the content of the iron ion of sulphate form existence, such as ferric sulfate and ferrous sulfate.According to embodiments of the invention, when carrying out sulfuric acid leaching reaction, the ratio in the sulphuric acid soln adopted and irony ore deposit is also not particularly limited, as long as at the obtained content containing the leach liquor Free Acid of ferric sulfate within the scope of 40 ~ 45g/L, in other words, finally obtaining containing the leach liquor of ferric sulfate in still containing the sulfuric acid of non-complete reaction of 40 ~ 45g/L, it is excessive for being the amount that sulfuric acid leaching reacts the sulfuric acid added.
S200: the first neutralizing treatment
In this step, can, at the temperature of 85 ~ 98 degrees Celsius, magnesia ore deposit be utilized to carry out the first neutralizing treatment, the content of leach liquor Free Acid is down to 5g/L to the leach liquor containing ferric sulfate obtained in a previous step.According to the embodiment of the present invention, utilizing magnesia ore deposit before the leach liquor with ferric sulfate carries out the first neutralizing treatment, in advance magnesia ore deposit can be pulverized, such as, irony ore deposit can be carried out being crushed to the particle that granularity is not more than 75 microns (200 orders) and account for more than 95 % by weight.When carrying out the first neutralizing treatment, adopt the ratio in the leach liquor of ferric sulfate and magnesia ore deposit and be not particularly limited, as long as the content of the obtained leach liquor Free Acid containing ferric sulfate is down to 5g/L, pH value can be adjusted between 1.0 ~ 2.5 thus.According to embodiments of the invention, the leach liquor of magnesia ore deposit and ferric sulfate adds the mode of reactor and is not particularly limited, according to the embodiment of the present invention, when carrying out the first neutralizing treatment, this neutralization reaction can be carried out by the temperature of 85 ~ 95 degrees Celsius, and according to embodiments of the invention, the mode of heating is also not particularly limited, the method such as electrically heated, burning heat-dissipating can be adopted.According to embodiments of the invention, when carrying out the first neutralizing treatment, because temperature of reaction is close to boiling point, thus can guarantee first neutralizing treatment reaction in, magnesia ore deposit can with containing ferric sulfate leach liquor generation chemical reaction, mainly as follows:
H
2SO
4+MgO=MgSO
4+H
2O
Fe
2（SO
4）
3+3H
2O=Fe
2O
3+3H
2SO
4
From above-mentioned reaction formula, when can find out the first neutralizing treatment, mainly can there are two kinds of reactions, one is residual free acid generation neutralization reaction in magnesium-containing compound and described sulfur acid iron leach liquor in magnesia ore deposit, according to the embodiment of the present invention, magnesium-containing compound can comprise magnesium oxide, magnesiumcarbonate and magnesium hydroxide one of at least.Two is along with the leach liquor Free Acid of sulfur acid iron is neutralized, and when the pH value of described sulfur acid iron leach liquor is adjusted to 1.0 ~ 2.5, ferric ion generation hydrolysis reaction in the leach liquor of sulfur acid iron, generates oxides-containing iron.
According to embodiments of the invention, above-mentioned reaction can be carried out at ambient pressure, thus, can improve the safety performance of the method, reduces equipment investment, thus reduces the implementation cost of the method.
According to embodiments of the invention, for implementing the kind of the reactor of above-mentioned neutralization reaction and being not particularly limited, those skilled in the art can select any known reactor.According to the embodiment of the present invention, when carrying out the first neutralizing treatment, by mechanical stirring mode by magnesia ore deposit and the leach liquor Homogeneous phase mixing containing ferric sulfate, so that the efficiency of raising first neutralizing treatment.According to embodiments of the invention, stirring velocity can be 200 ~ 300rpm, preferred 250rpm.Thus, the efficiency of neutralization reaction can be improved further, thus improve the processing efficiency to nickel-containing eluvial ore further.
S300: the second neutralizing treatment
According to the embodiment of the present invention, due to carry out in first and process in, can there is hydrolysis reaction in the ferric ion in sulfur acid iron leach liquor, while ferric ions precipitation, generate sulfuric acid.Continuing for making hydrolysis reaction to carry out, according to the embodiment of the present invention, at the temperature of 85 ~ 98 degrees Celsius, having carried out the second neutralizing treatment.Concrete, in this step, the first alkaline neutralization reagent is joined in the leach liquor of sulfur acid iron.
According to embodiments of the invention, in this second neutralizing treatment, the acid meeting in the leach liquor of sulfur acid iron and alkaline neutralization reagent generation chemical reaction, mainly as follows:
OH
-+H
+=H
2O
By this second neutralizing treatment, the pH of leaching solution of described sulfur acid iron maintains between 1.0 ~ 2.5, thus constantly there is hydrolysis reaction in the ferric ion in the leach liquor of sulfur acid iron, wherein the second neutralizing treatment time being not particularly limited, as long as 85 ~ 90% ferric ions precipitation in the leach liquor of sulfur acid iron, such as can control the reaction times is 1 ~ 4h.
According to embodiments of the invention, the kind of the first alkaline neutralization reagent is also not particularly limited, and can be oxide compound, oxyhydroxide or the carbonate one of at least that are selected from magnesium, nickel and cobalt.In other words, the first alkaline neutralization reagent can for being selected from following at least one group:
The oxide compound of (a) magnesium, the carbonate of oxyhydroxide one of at least;
The oxide compound of (b) nickel, the carbonate of oxyhydroxide one of at least; And
The oxide compound of (c) cobalt, the carbonate of oxyhydroxide one of at least.
Thus, the efficiency utilizing the first alkaline neutralization reagent to carry out the second neutralizing treatment can be improved further.
According to embodiments of the invention, the form of the first alkaline neutralization reagent is also not particularly limited, namely can be that first of solution state the alkaline neutralization reagent is joined in the leach liquor of the first neutralizing treatment, also can directly first of solid state the alkaline neutralization reagent be joined in the leach liquor of the first neutralizing treatment.
According to embodiments of the invention, when carrying out the second neutralizing treatment, adopt the ratio of the leach liquor of ferric sulfate and the first alkaline neutralization reagent and be not particularly limited, as long as the obtained pH of leaching solution containing ferric sulfate is maintained between 1.0 ~ 2.5.According to embodiments of the invention, above-mentioned second neutralization reaction can be carried out at ambient pressure, thus, can improve the safety performance of the method, reduces equipment investment, thus reduces the implementation cost of the method.
According to embodiments of the invention, for implementing the kind of the reactor of above-mentioned neutralization reaction and being not particularly limited, those skilled in the art can select any known reactor.According to the embodiment of the present invention, when carrying out the second neutralizing treatment, by mechanical stirring mode by the first alkaline neutralization reagent and the leach liquor Homogeneous phase mixing containing ferric sulfate, so that the efficiency of raising second neutralizing treatment.According to embodiments of the invention, stirring velocity can be 200 ~ 300rpm, preferred 250rpm.Thus, the efficiency of neutralization reaction can be improved further, thus improve the processing efficiency to nickel-containing eluvial ore further.
According to embodiments of the invention, after carrying out the second neutralizing treatment, can by and rear slurry filter, washing, obtain high ferro height silicon filter residue.According to embodiments of the invention, filter, mode of washing is also not particularly limited, and those skilled in the art can adopt any known filtration, mode of washing.According to embodiments of the invention, the high ferro height silicon filter residue obtained due to its iron content high, siliceous height, thus can be widely used in brickmaking, the building materials industries such as cement.
In addition, according to the embodiment of the present invention, due in the leach liquor of sulfur acid ferrous iron containing a small amount of ferrous ion, therefore, in embodiments of the present invention, one of at least carrying out containing under oxygen atmosphere of the first neutralizing treatment and the second neutralizing treatment.Thus, in the process of neutralizing treatment, ferrous ion can be converted into ferric ion, thus de-ironing efficiency can be improved further.According in the embodiment of the present invention, containing oxygen atmosphere by introduce in the first neutralizing treatment and the second neutralizing treatment pure oxygen, air, hydrogen peroxide, potassium perchlorate one of at least or their combination, wherein, according to the embodiment of the present invention, by adding pure oxygen or air, thus de-ironing efficiency can be improved further.
S400: the three neutralizing treatment
According to the embodiment of the present invention, filtered by the leach liquor of the sulfur acid iron through the second neutralizing treatment, obtain filtrate and high ferro height silicon filter residue, wherein filtrate contains the metal such as nickel, cobalt.According to the embodiment of the present invention, for reclaiming nickel and cobalt in filtrate, the 3rd neutralizing treatment is carried out to filtrate.Particularly, at the temperature of 85 ~ 98 degrees Celsius, the second alkaline neutralization reagent is added in filtrate and carries out the 3rd neutralizing treatment.
According to embodiments of the invention, in the 3rd neutralizing treatment, the free acid in the leach liquor after the second neutralizing treatment can with the second alkaline neutralization reagent generation chemical reaction, mainly as follows:
OH
-+H
+=H
2O
According to embodiments of the invention, the kind of the second alkaline neutralization reagent is also not particularly limited, and can be oxide compound, oxyhydroxide or the carbonate one of at least that are selected from magnesium, nickel and cobalt.In other words, the second alkaline neutralization reagent can for being selected from following at least one group:
The oxide compound of (a) magnesium, the carbonate of oxyhydroxide one of at least;
The oxide compound of (b) nickel, the carbonate of oxyhydroxide one of at least; And
The oxide compound of (c) cobalt, the carbonate of oxyhydroxide one of at least.
Thus, the efficiency utilizing the second alkaline neutralization reagent to carry out the 3rd neutralizing treatment can be improved further.
According to embodiments of the invention, the form of the second alkaline neutralization reagent is also not particularly limited, namely can be that second of solution state the alkaline neutralization reagent is joined in the leach liquor of the second neutralizing treatment, also can directly second of solid state the alkaline neutralization reagent be joined in the leach liquor of the second neutralizing treatment.
According to embodiments of the invention, for implementing the kind of the reactor of above-mentioned neutralization reaction and being not particularly limited, those skilled in the art can select any known reactor.According to the embodiment of the present invention, when carrying out the 3rd neutralizing treatment, by mechanical stirring mode by the second alkaline neutralization reagent and filtrate liquid Homogeneous phase mixing, so that the efficiency of raising the 3rd neutralizing treatment.According to embodiments of the invention, stirring velocity can be 200 ~ 300rpm, preferred 250rpm.Thus, the efficiency of neutralization reaction can be improved further, thus improve the processing efficiency to nickel-containing eluvial ore further.
According to the embodiment of the present invention, those skilled in the art can adopt any known feed postition, such as and add mode or to add mode.Second alkaline neutralization reagent and filtrate ratio are also not particularly limited, as long as obtain filtrate pH value between 3.5 ~ 4.0, ferric iron can be removed clean thus, after the 3rd neutralizing treatment, will in and rear slurry again filter, washing, obtains filtrate and filter residue.According to the embodiment of the present invention, the filter residue that obtains returns to irony ore deposit and leaches process.Realize the circular treatment to filter residue, thus can de-ironing efficiency be improved, and efficient recovery is carried out to the nickel cobalt residued in filter residue.The filtrate that obtains returns extracts nickel, cobalt product step, thus, effectively can obtain nickel cobalt metal.
In addition, according to the embodiment of the present invention, each step of process nickel-containing eluvial ore method provided by the invention is carried out at normal pressure.Namely not high to equipment requirements when processing nickel-containing eluvial ore.Change and talk about, the process nickel-containing eluvial ore method equipment investment expense that the present invention proposes is low, can reduce operation cost of enterprises.
In addition, as previously mentioned, according to the embodiment of the present invention, the alkaline neutralization reagent that can adopt in the present invention is oxide compound, oxyhydroxide or the carbonate one of at least that are selected from magnesium, nickel and cobalt.Because the oxide compound of magnesium, oxyhydroxide or carbonate can obtain in the waste water of process nickel-containing eluvial ore, therefore achieve resource circulation utilization, reduce production cost.
Below by specific embodiment, present invention is described, it should be noted that, the following examples are only used to the object illustrated, and the scope do not limited the present invention in any way.In addition, as nothing clearly states, the reagent adopted in embodiment is below commercially available.
Embodiment 1
With reference to figure 2, utilize sulfuric acid to carry out sulfuric acid leaching to irony ore deposit, obtain the leach liquor (leaching slurry) containing ferric sulfate.Under normal pressure, temperature 85 ~ 98 DEG C and mechanical stirring speed are the condition of 250rpm, utilize magnesia ore deposit that obtained leach liquor Free Acid concentration is dropped to 4.5 ~ 5g/L from 40 ~ 45g/L, pH drops to 1.0 ~ 2.5, when temperature is 95 degrees Celsius, ferric iron hydrolysis generates ferric oxide precipitation, as reaction formula below.Thus realize deironing from leach liquor, the valuable component such as nickel, cobalt simultaneously in magnesia ore deposit by acid-soluble go out.
Fe
2（SO
4）
3+3H
2O=Fe
2O
3+3H
2SO
4
Next, with magnesium hydroxide slurry as neutralizing agent at boiling temperature in and the sulfuric acid that generates in above-mentioned steps, to maintain pH 1.0 ~ 2.5, reaction 3 ~ 6h, and then make ferric iron continue hydrolysis.The iron of nearly 85 ~ 90% is finally made to form precipitation.Filter, wash rear output leach liquor and filter residue, iron level 55% in filter residue, sulphur content about 2%, nickel content 0.15%.
Again utilize magnesium hydroxide slurry process leach liquor, make its pH value rise to 3.5 ~ 4.0, then filter, wash output nickel cobalt leach liquor and leach residue, leaching residue is back to sulfuric acid leaching.
From above-described embodiment, can find out, in process nickel-containing eluvial ore process, temperature maintains between 85 to boiling temperature, control pH maintains between 1.0 ~ 2.5, mechanical stirring speed is 250rpm and under the condition of normal pressure, be the top condition of precipitated iron from nickel-containing eluvial ore.The throw out iron content that obtains, silicon content is high, and sulfur-bearing nickel content is low.And water content is low.Therefore, this this throw out can be used for the industrial circle such as brickmaking, cement.
In the description of this specification sheets, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art can change above-described embodiment within the scope of the invention when not departing from principle of the present invention and aim, revising, replacing and modification.
Claims (10)
1. process a method for nickel-containing eluvial ore, it is characterized in that, comprise the following steps:
Described nickel-containing eluvial ore is divided into magnesia ore deposit and irony ore deposit;
At the temperature of 85 ~ 98 degrees Celsius, utilize sulfuric acid to carry out leaching process to described irony ore deposit, to obtain the leach liquor containing ferric sulfate, wherein, the content of the described leach liquor Free Acid containing ferric sulfate is 40 ~ 45g/L;
At the temperature of 85 ~ 98 degrees Celsius, described magnesia ore deposit is utilized to carry out the first neutralizing treatment, the content of described leach liquor Free Acid is down to 5g/L to the described leach liquor containing ferric sulfate;
At the temperature of 85 ~ 98 degrees Celsius, the first neutralizing agent is utilized to carry out the second neutralizing treatment to the leach liquor through the first neutralizing treatment, the pH of the described leach liquor through the first neutralizing treatment is maintained 1.0 ~ 2.5; And
The second neutralizing agent is utilized to carry out the 3rd neutralizing treatment to the leach liquor through the second neutralizing treatment and filter, to obtain high ferro filter residue and the leach liquor containing nickel cobalt,
Wherein, described first neutralizing agent and described second neutralizing agent are independently for being selected from oxide compound, oxyhydroxide or the carbonate one of at least of magnesium, nickel and cobalt.
2. method according to claim 1, is characterized in that, the magnesium of 18 ~ 20 % by weight is contained in described magnesia ore deposit.
3. method according to claim 1, is characterized in that, one of at least carrying out containing under oxygen atmosphere of described first neutralizing treatment and described second neutralizing treatment.
4. method according to claim 3, is characterized in that, the described oxygen atmosphere that contains is provided by hydrogen peroxide, potassium perchlorate, pure oxygen or air.
5. method according to claim 4, is characterized in that, described is pure oxygen or air containing oxygen atmosphere.
6. method according to claim 1, is characterized in that, one of at least carrying out at ambient pressure of described first neutralizing treatment, the second neutralizing treatment and the 3rd neutralizing treatment.
7. method according to claim 1, is characterized in that, before carrying out the 3rd neutralizing treatment to the leach liquor through the second neutralizing treatment, carries out filtration washing to the described leach liquor through the second neutralizing treatment, to obtain filtrate and high ferro height silicon filter residue; And
Obtained filtrate is carried out the 3rd neutralizing treatment.
8. method according to claim 4, is characterized in that, in the first neutralizing treatment and the second neutralizing treatment process one of at least, with the stirring velocity of 250rpm in and system stir.
9. method according to claim 1, is characterized in that, comprises further described high ferro filter residue after the 3rd neutralizing treatment and described irony ore deposit are carried out leaching processing.
10. method according to claim 1, is characterized in that, comprises the step reclaiming nickel and cobalt from described nickel and cobalt containing leach liquor further.
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| CN101736149A (en) * | 2008-11-05 | 2010-06-16 | 玉林伟镍科技矿冶有限公司 | Leaching method for nickel-containing eluvial ores |
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