CN103710542B - Class iron ore concentrate and preparation method thereof - Google Patents
Class iron ore concentrate and preparation method thereof Download PDFInfo
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- CN103710542B CN103710542B CN201410014464.8A CN201410014464A CN103710542B CN 103710542 B CN103710542 B CN 103710542B CN 201410014464 A CN201410014464 A CN 201410014464A CN 103710542 B CN103710542 B CN 103710542B
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Abstract
The invention discloses kind iron ore concentrate and preparation method thereof, the method comprises the following steps: nickel-containing eluvial ore to be divided into magnesia ore deposit and irony ore deposit; Under 95 ~ 100 centigradetemperatures, sulfuric acid is utilized to carry out leaching process to irony ore deposit, to obtain the leach liquor containing ferric sulfate; Leach liquor containing ferric sulfate is filtered, to obtain the first high silicon filter residue and the first filtrate; And utilize magnesia ore deposit to carry out the first neutralizing treatment to the first filtrate.The first filtrate through the first neutralizing treatment is filtered, the high silicon filter residue of output second and the second filtrate.And under 95 ~ 105 degree celsius temperature, utilizing alkaline neutralization reagent carry out the second neutralizing treatment to the second filtrate and filter, washing, obtains iron containing compounds precipitation.And under 85 ~ 90 degree celsius temperature, utilize alkaline reagents to carry out alkali cleaning post-drying to iron containing compounds, obtain class hematite concentrates and nickel and cobalt containing liquid.Can valuable metal in efficient recovery nickel-containing eluvial ore by the method.
Description
Technical field
The present invention relates to field of metallurgy, particularly relate to a kind of method preparing class iron ore concentrate from nickel-containing eluvial ore sulphuric leachate.
Background technology
Mainly contain Jarosite process, goethite process, secondary goethite process and hematite process from containing iron method heavy ferric sulfate (comprising ferrous sulfate) solution, they all have use in zinc abstraction.Autumn fields zinc company of Japan adopts its operating condition of hematite precipitation iron under 195-200 DEG C of centigradetemperature, and oxygen partial pressure is 150-250kPa, and reaction times 3h obtains rhombohedral iron ore and contains 56.3%Fe, 3.9%S and 0.33%Zn.This product can be used for ironmaking or Cement industry, thus eliminates scum accumulation problem.
In view of the method processing temperature is high, pressure is large, and in limitations such as equipment making, maintenance, production managements, current industrial application is little.
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 a kind of method preparing class iron ore concentrate from nickel-containing eluvial ore sulphuric leachate.Prepare class iron ore concentrate by the method, operation and equipment and simple, and operational condition can be carried out at atmospheric boiling point temperature.Therefore, greatly reduce on the one hand from the cost containing iron heavy nickel minerals, reduce the wasting of resources; To solve on the other hand in nickel ore smelting produce the problems such as waste residue land occupation and contaminate environment.
According to the embodiment of the present invention, the present invention proposes a kind of method preparing class iron ore concentrate, comprises the following steps: nickel-containing eluvial ore to be divided into magnesia ore deposit and irony ore deposit; Under 95 ~ 100 centigradetemperatures, 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; Under 95 ~ 100 centigradetemperatures, the described leach liquor containing ferric sulfate is filtered, to obtain the first high silicon filter residue and the first filtrate; Described magnesia ore deposit is utilized to carry out the first neutralizing treatment to described first filtrate, so that by pH regulator to 1.0 ~ 2.5 of described the first filtrate through the first neutralizing treatment.Described the first filtrate through the first neutralizing treatment is filtered, the high silicon filter residue of output second and the second filtrate.Under 95 ~ 105 degree celsius temperature, utilize alkaline neutralization reagent carry out the second neutralizing treatment to the second filtrate and filter, washing, obtain iron containing compounds precipitation.And under 85 ~ 90 degree celsius temperature, utilize alkaline reagents to carry out alkali cleaning post-drying to described iron containing compounds, obtain class hematite concentrates and nickel and cobalt containing solution.Sulfuric acid is utilized to leach process in nickel-containing eluvial ore by aforesaid method, deironing under boiling temperature under employing normal pressure, output iron content is approximately 60%, sulfur-bearing is approximately the class iron ore concentrate of 1%, not only can be used for Iron industry and increase enterprise's income, also can be used for cement, building materials industry, solve scum and store up and occupy a large amount of soil, also mitigate simultaneously and potentially contaminated caused to environment, and investment and running cost low.
According to the embodiment of the present invention, the method can also have following additional technical characteristic:
In an 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 preparation class iron ore concentrate further.
In an embodiment of the invention, described alkaline neutralization reagent is be selected from the oxide compound one of at least of magnesium, nickel and cobalt, oxyhydroxide, carbonate or their combinations.Thus, the efficiency utilizing alkaline neutralization reagent to carry out the second neutralizing treatment can be improved further, thus improve the efficiency of preparation class iron ore concentrate further.
In an 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 preparation class iron ore concentrate efficiency can be improved further.In one embodiment of the invention, described is provided by pure oxygen, air or their combination containing oxygen atmosphere.Thus, can improve further and ferrous iron is converted into ferric efficiency, thus preparation class iron ore concentrate efficiency can be improved further.
In an embodiment of the invention, described first neutralization reaction, one of at least the carrying out at ambient pressure of the second neutralization reaction and alkali cleaning.Thus, the safety performance of the method can be improved, reduce equipment investment, thus reduce the cost implementing described preparation class iron ore concentrate.
In an embodiment of the invention, before carrying out the first neutralizing treatment, the leach liquor of described sulfur acid iron is filtered, obtain containing 63 % by weight white residues and the first filtrate.Thus, improve the efficiency of the first neutralizing treatment further, thus improve the efficiency of preparation class iron ore concentrate further.
In an embodiment of the invention, before carrying out the second neutralizing treatment in described first neutralizing treatment and rear slurry filter, obtain containing 60 % by weight white residues and the second filtrate.Thus, improve the efficiency of the second neutralizing treatment further, thus improve the efficiency of preparation class iron ore concentrate further.
In an embodiment of the invention, described second filtrate is 44 ~ 50g/l containing concentration of iron, is 6g/l containing nickel concentration.Thus, improve the efficiency of the second neutralizing treatment further, thus improve the efficiency of preparation class iron ore concentrate further.
In an embodiment of the invention, before carrying out alkali cleaning in described second neutralizing treatment and rear slurry filter so that obtain iron containing compounds precipitation.Thus, improve the efficiency of alkali cleaning further, thus improve the efficiency of preparation class iron ore concentrate further.
In an embodiment of the invention, described alkaline reagents be selected from sodium hydroxide, potassium hydroxide one of at least.Thus, improve the efficiency of alkali cleaning further, thus improve the efficiency of preparation class iron ore concentrate further.
In an embodiment of the invention, the concentration of the alkali lye that described alkali cleaning adopts is 10g/l, and the mass ratio that alkali lye and described iron containing compounds precipitate is 2.5/1.Thus, improve the efficiency of alkali cleaning further, thus improve the efficiency of preparation class iron ore concentrate further.
In an embodiment of the invention, in the process one of at least of the first neutralizing treatment, the second neutralizing treatment and alkali cleaning, with the stirring velocity of 250rpm, reaction system is stirred.Thus, improve further the efficiency of the first neutralizing treatment, the second neutralizing treatment and alkali cleaning, thus improve the efficiency of preparation class iron ore concentrate further.
According to the embodiment of the present invention, by the sulfuric acid leaching process to nickel-containing eluvial ore, and the first neutralizing treatment through magnesia ore deposit, the steps such as the second neutralizing treatment of alkaline neutralization reagent and alkali cleaning, preparation class iron ore concentrate.The class iron ore concentrate iron content 60 % by weight prepared by the method, sulfur-bearing 1 ~ 1.5 % by weight.Described class iron ore concentrate iron content is high, and sulfur-bearing is low, can be used for Iron industry, increases enterprise's income, also can be used for cement, building materials industry.Thus, solve scum further and store up and occupy a large amount of soil, also mitigate and potentially contaminated is caused to environment.
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 preparation class iron ore concentrate of one embodiment of the invention;
Fig. 2 is the schematic flow sheet of the preparation class iron ore concentrate of 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.
In addition, term " 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, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.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 that the embodiment of the present invention prepares class iron ore concentrate is described.As shown in Figure 1, the method preparing 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, at the temperature of 95 ~ 100 degrees Celsius, utilize sulfuric acid 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, and iron content is 40g/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 sulphuric acid soln be adopted, such as can adopt concentration be 93 ~ 98% sulphuric acid soln.
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.
According to embodiments of the invention, for implement above-mentioned sulfuric acid to irony ore deposit leach processing reaction reactor kind and be not particularly limited, those skilled in the art can select any known reactor.Reaction reagent adds the feed postition of reactor and is not particularly limited, such as can and add mode or to add mode, preferably to add mode.According to the embodiment of the present invention, when carrying out sulfuric acid leaching process, by mechanical stirring mode, sulfuric acid is mixed with irony ore deposit, to improve the effect in sulfuric acid leaching irony ore deposit.According to embodiments of the invention, stirring velocity can be 200 ~ 300rpm, preferred 250rpm.Thus, the efficiency in sulfuric acid leaching irony ore deposit can be improved further, thus improve the efficiency of preparation class iron ore concentrate further.
S200: the first neutralizing treatment
Before carrying out the first neutralizing treatment to the leach liquor containing ferric sulfate, filter the leach liquor containing ferric sulfate, obtain the filter residue containing 63 % by weight silicon-dioxide, this filter residue is because siliceous High Availabitity is in building material industry.In this step, can, at the temperature of 95 ~ 100 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 S100 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 95 ~ 100 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.In addition, the valuable components such as the nickel in magnesia ore deposit, cobalt by acid-soluble go out, thus be convenient to follow-up further recovery nickel and cobalt containing product.
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 cost implementing described preparation class iron ore concentrate.
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.Reaction reagent adds the feed postition of reactor and is not particularly limited, such as can and add mode or to add mode, preferably to add mode.According to the embodiment of the present invention, when carrying out the first neutralizing treatment, by mechanical stirring mode, magnesia ore deposit is mixed with the leach liquor containing ferric sulfate, to improve the efficiency of the first neutralizing treatment.According to embodiments of the invention, stirring velocity can be 200 ~ 300rpm, preferred 250rpm.According to the embodiment of the present invention, being not particularly limited the type of heating of reactor, such as, can be electrically heated or combustion heating mode.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, after the first neutralizing treatment, the leach liquor of sulfur acid iron is filtered, obtain the silicon-dioxide and the filtrate that contain 60 % by weight, iron content 44 ~ 50g/l in this filtrate, nickel 6g/l.Alkaline neutralization reagent to be joined after the first neutralizing treatment in filtrate.
According to the embodiment of the present invention, this step is at normal pressure, carries out at the temperature of 95 ~ 105 degrees Celsius, the main following chemical reaction occurred:
OH
-+H
+=H
2O
Fe
2(SO4)
3+3H
2O=Fe
2O
3+3H
2SO
4
Alkalescence neutralization reagent kind is also not particularly limited, and can be selected from containing the oxide compound of magnesium, nickel or cobalt, oxyhydroxide or carbonate.In other words, alkaline neutralization reagent can be selected from following at least one group:
(1) containing the oxide compound of magnesium, oxyhydroxide or carbonate one of at least;
(2) nickeliferous oxide compound, oxyhydroxide or carbonate one of at least; And
(3) containing the oxide compound of cobalt, oxyhydroxide or carbonate one of at least.
Thus, alkaline neutralization reagent can be utilized further to improve the processing efficiency of the second neutralization.
According to the embodiment of the present invention, alkalescence neutralization reagent form and be not particularly limited, can join in the filtrate after the first neutralizing treatment with the alkaline neutralization reagent of liquid state, also can join in the filtrate after the first neutralizing treatment with the alkaline neutralization reagent of solid state.As long as the sulfuric acid generation neutralization reaction produced after can being hydrolyzed with iron ion in filtrate.
According to the embodiment of the present invention, the ratio of alkaline neutralization reagent and filtrate is also not particularly limited, as long as can sulfuric acid that fully iron ion hydrolysis produces in neutralization filtrate, in other words, the pH value of the filtrate of sulfur acid iron maintains 1.5 ~ 2.0.Thus, there is the efficiency of neutralization reaction in the alkaline neutralization reagent of raising and filtrate further.Thus, improve the efficiency of preparation class iron ore concentrate further.
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.Reaction reagent adds the feed postition of reactor and is not particularly limited, such as can and add mode or to add mode, preferably to add mode.According to the embodiment of the present invention, when carrying out the second neutralizing treatment, by mechanical stirring mode, alkaline neutralization reagent is mixed with the leach liquor containing ferric sulfate, to improve the efficiency of the second neutralizing treatment.According to embodiments of the invention, stirring velocity can be 200 ~ 300rpm, preferred 250rpm.According to the embodiment of the present invention, being not particularly limited the type of heating of reactor, such as, can be electrically heated or combustion heating mode.Thus, the efficiency of neutralization and hydrolysis reaction can be improved further, thus improve the efficiency of preparation class iron ore concentrate further.
S400: alkali cleaning
According to the embodiment of the present invention, before this step of enforcement, first filter carrying out in S300 step with rear slurry during the second neutralizing treatment obtains, washing, obtains the throw out of iron containing compounds and filtrate that is nickeliferous, cobalt.Wherein, iron content 55 % by weight in iron containing compounds throw out, sulfur-bearing 3 % by weight, nickeliferous 0.02 % by weight, moisture 12 % by weight, wherein iron containing compounds is mainly with Fe
4(OH)
10sO
4form exists.Add reactor by the throw out of iron containing compounds after washing and alkaline reagents, make it fully react.
According to the embodiment of the present invention, it is at normal pressure that the throw out of iron containing compounds and alkaline reagents react, and carries out at the temperature of 95 ~ 105 degrees Celsius, and with normally carrying out of guaranteeing that alkali cleaning reacts, the chemical reaction of generation is mainly as follows:
Fe
4(OH)
10SO
4=2Fe
2O
3+H
2SO
4+4H
2O
The mixture of iron containing compounds and the ratio of alkaline reagents are also not particularly limited, in an embodiment of the invention, the mass ratio of the iron in alkaline reagents and iron containing compounds is 2.5:1, and their reaction times in reactor is also not particularly limited, such as preferred reaction 3 ~ 6 hours.According to the embodiment of the present invention, the kind of alkaline reagents is also not particularly limited, can be selected from sodium hydroxide or potassium hydroxide one of at least, in addition, the concentration of alkaline reagents is also not particularly limited, the concentration of such as alkaline reagents can be 1 ~ 40g/L, the sodium hydroxide of preferred 10g/l or potassium hydroxide.
According to the embodiment of the present invention, the form of alkaline reagents is also not particularly limited, and can join in the filtrate after the 3rd neutralizing treatment with the alkaline reagents of liquid state, also can join in the filtrate after the 3rd neutralizing treatment with the alkaline neutralization reagent of solid state.As long as can with Fe in throw out
4(OH)
10sO
4fully react.
According to embodiments of the invention, for implementing the kind of the reactor of above-mentioned alkali cleaning reaction and being not particularly limited, those skilled in the art can select any known reactor.Reaction reagent adds the feed postition of reactor and is not particularly limited, such as can and add mode or to add mode, preferably to add mode.According to the embodiment of the present invention, when carrying out alkaline cleaning procedure, by mechanical stirring mode, alkaline reagents is mixed, to improve the efficiency of alkali cleaning with the mixture containing iron compound thing.According to embodiments of the invention, stirring velocity can be 200 ~ 300rpm, preferred 250rpm.According to the embodiment of the present invention, being not particularly limited the type of heating of reactor, such as, can be electrically heated or combustion heating mode.Thus, the efficiency of alkali cleaning reaction can be improved further, thus improve the efficiency of preparation class iron ore concentrate further.
According to the embodiment of the present invention, can turn back to for nickeliferous, the cobalt filtrate that obtain after the second neutralizing treatment and reclaim nickel cobalt step.Thus, obtain the product containing nickel cobalt, thus improve efficient recovery and the Appropriate application of resource further.After decreasing process, waste liquid is to the pollution of land resources and water resources.
In addition, according to the embodiment of the present invention, it is at normal pressure that the present invention prepares class iron ore concentrate, close to what carry out under boiling temperature.Owing to being not high especially to pressure and temperature requirement in preparation class iron ore concentrate process, namely not high to equipment requirements at preparation class iron ore concentrate.The preparation class iron ore concentrate method equipment investment expense describing the present invention's proposition is low, can reduce operation cost of enterprises.
According to the embodiment of the present invention, described alkaline neutralization reagent is oxide compound, oxyhydroxide or the carbonate one of at least that are selected from magnesium, nickel and cobalt.The oxide compound of described magnesium, oxyhydroxide or carbonate can be prepared the waste water after class iron ore concentrate from the present invention and obtains, and realize resource circulation utilization.
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.
The interruption test of embodiment 1 heavy iron from nickel-containing eluvial ore leach liquor
Use 3L glass beaker, electrically heated maintains temperature 95 ~ 105 DEG C in nickel-containing eluvial ore leach liquor, mechanical stirring speed 250rpm, with magnesium hydroxide slurry, pH of leaching solution is adjusted to 1.3, pH meter Real-Time Monitoring is used, reaction 3 ~ 6h, 85 ~ 95%Fe precipitation in leach liquor in reaction process, wherein nickel content 0.15%, scum iron content is about 54%.
Embodiment 2 sinks the long run test of iron from nickel-containing eluvial ore leach liquor
Be composed in series reaction vessel, mechanical stirring with 4 3L beakers, electrically heated maintains temperature of reaction 100 ~ 105 DEG C, the 2nd, 4 beaker fills pH meter to monitor leach liquor acidity, and maintaining pH of leaching solution is 1.3 ~ 2.0,5L settler.
Nickel-containing eluvial ore leach liquor (700ml/h) and magnesium hydroxide slurries simultaneous quantitative pump are added the first reactor, settler supernatant liquor is containing Fe2 ~ 3g/l, underflow iron content 55% sulfur-bearing 3.0 ~ 2.5%, the class rhombohedral iron ore of alkali cleaning output sulfur-bearing 1.0 ~ 1.5% after filtering.
Embodiment 3
At normal pressure, at the temperature of 95 ~ 100 degrees Celsius, utilize sulfuric acid to leach irony ore deposit, (in leaching slurry, iron content is about 40g/l (Fe to the leach liquor obtaining containing ferric sulfate
2+<0.002g/l)), 40-45g/l, Ni6g/l is about containing free acid).Leach liquor is filtered output filter residue (containing SiO
263%) and filtrate.Under normal pressure, temperature 95 ~ 100 DEG C and mechanical stirring speed are the condition of 250rpm, utilize magnesia ore deposit (containing Mg18-20%) to neutralize institute and obtain Fe in filtrate
3+the acid that hydrolysis reaction generates, considers liquid Free Acid concentration and drops to 4.5 ~ 5g/l from 40 ~ 45g/l.Simultaneously in magnesia ore deposit the valuable component such as nickel, cobalt by acid-soluble go out, when pH value drops to 1.5-2.0, thus, deironing from leach liquor can be realized.By to utilize in magnesia ore deposit and after mixing solutions carry out filtration treatment, and magnesium hydroxide slurry is added in filtrate, so that the sulfuric acid of separating out when neutralizing heavy iron, measure with pH meter in this reaction process, maintain pH to 1.0 ~ 2.5, after reaction 3 ~ 6h, after testing, 80 ~ 90%Fe is out precipitated, throw out is class iron ore concentrate, wherein iron level 55%, sulphur content about 2%, nickel content 0.15%.
Upper example illustrates that from nickel-containing eluvial ore leach liquor, be bordering on iron under boiling temperature is at ambient pressure feasible with class hematite precipitation
.Sink compared with iron with sodium jarosite, output rhombohedral iron ore slag iron content is high, sulfur-bearing is low, and filtration velocity is fast, slag is moisture low, slag
Form primarily of class rhombohedral iron ore.
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. prepare a method for class iron ore concentrate, it is characterized in that, comprise the following steps:
Nickel-containing eluvial ore is divided into magnesia ore deposit and irony ore deposit;
At the temperature of 95 ~ 100 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;
The described leach liquor containing ferric sulfate is filtered, to obtain the first high silicon filter residue and the first filtrate; At the temperature of 95 ~ 100 degrees Celsius, described magnesia ore deposit is utilized to carry out the first neutralizing treatment to described first filtrate, so that by pH regulator to 1.0 ~ 2.5 of described the first filtrate through the first neutralizing treatment, described the first filtrate through the first neutralizing treatment is filtered, to obtain the second high silicon filter residue and the second filtrate; Described second filtrate is 44 ~ 50g/l containing concentration of iron;
Under 95 ~ 105 degree celsius temperature, utilize alkaline neutralization reagent carry out the second neutralizing treatment to the second filtrate and filter, washing, obtain iron containing compounds precipitation and nickel and cobalt containing solution; Described alkaline neutralization reagent is be selected from magnesium, nickel and cobalt oxide compound, oxyhydroxide or carbonate one of at least;
Under 85 ~ 90 degree celsius temperature, utilize alkaline reagents to carry out alkali cleaning post-drying to described iron containing compounds precipitation, obtain class hematite concentrates.
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, described is provided by pure oxygen, air, hydrogen peroxide, potassium perchlorate or their combination containing oxygen atmosphere.
5. method according to claim 1, is characterized in that, described first neutralization reaction, one of at least the carrying out at ambient pressure of the second neutralization reaction and alkali cleaning.
6. method according to claim 1, is characterized in that, filters before carrying out the first neutralizing treatment to the leach liquor of described sulfur acid iron, obtains containing 63 % by weight white residues and the first filtrate.
7. method according to claim 1, is characterized in that, before carrying out the second neutralizing treatment in described first neutralizing treatment and rear slurry filter, obtain containing 60 % by weight white residues and the second filtrate.
8. method according to claim 7, is characterized in that, described second filtrate is 6g/l containing nickel concentration.
9. method according to claim 1, is characterized in that, the concentration of the alkali lye that described alkali cleaning adopts is 10g/l, and the mass ratio that described alkali lye and described iron containing compounds precipitate is 2.5/1.
10. a kind iron ore concentrate, is characterized in that, described class iron ore concentrate is prepared by the method described in any one of claim 1 ~ 9.
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| CN201410014464.8A CN103710542B (en) | 2014-01-13 | 2014-01-13 | Class iron ore concentrate and preparation method thereof |
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| CN100410399C (en) * | 2004-06-28 | 2008-08-13 | 斯凯资源有限公司 | Method for nickel and cobalt recovery from laterite ores by reaction with concentrated acid and water leaching |
| US7604783B2 (en) * | 2004-12-22 | 2009-10-20 | Placer Dome Technical Services Limited | Reduction of lime consumption when treating refractor gold ores or concentrates |
| EP1971697B1 (en) * | 2006-01-10 | 2012-07-25 | Murrin Murrin Operations Pty Ltd | Hematite precipitation |
| AU2009201837A1 (en) * | 2008-05-08 | 2010-11-25 | Bhp Billiton Ssm Development Pty Ltd | Atmospheric Leach of Laterite with Iron Precipitation as Hematite |
| CN103060549B (en) * | 2012-11-26 | 2015-02-04 | 广西师范大学 | Improved method for processing high-iron and high-magnesium laterite and obtaining hematite product |
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