CN103060551B - Method for leaching vanadium - Google Patents
Method for leaching vanadium Download PDFInfo
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- CN103060551B CN103060551B CN201210590772.6A CN201210590772A CN103060551B CN 103060551 B CN103060551 B CN 103060551B CN 201210590772 A CN201210590772 A CN 201210590772A CN 103060551 B CN103060551 B CN 103060551B
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Abstract
The invention discloses a method for leaching vanadium. The method comprises the following steps: A) crushing crude ore containing vanadium, subsequently conducting primary wet-type semi-self-grinding on the crushed ore so as to obtain ore pulp, and sieving the ore pulp to make the granularity P80 of the ore in the ore pulp be less than or equal to 190 microns; B) mixing sulfuric acid and the ore so as to conduct primary leaching on the ore, after the primary leaching is accomplished, conducting solid-liquid separation so as to obtain a pregnant solution and primary leaching slag; and C) mixing the sulfuric acid and the primary leaching slag so as to conduct secondary leaching on the primary leaching slag, and after the secondary leaching is accomplished, conducting solid-liquid separation so as to obtain a leaching solution and the secondary leaching slag. By utilizing the leaching method provided by the embodiment of the invention, blocking phenomena in the grinding process are avoided.
Description
Technical field
The present invention relates to field of metallurgy, in particular to a kind of leaching method of vanadium.
Background technology
In the extract technology of existing vanadium, need to utilize rod mill, ball mill and tuber grinder to carry out multistage grinding to the raw ore containing vanadium, this causes the auxiliary process such as griding technology and dust removal by ventilation complicated, and production cost and energy consumption are all higher, the more important thing is, easily produce latch up phenomenon.
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, one object of the present invention is to propose a kind of leaching method avoiding occurring the vanadium of latch up phenomenon in comminution process.
For achieving the above object, a kind of leaching method of vanadium is proposed according to embodiments of the invention, the leaching method of described vanadium comprises the following steps: A) fragmentation is carried out to the raw ore containing vanadium, then one section of wet type carried out to the ore after fragmentation Semi-Autogenous to obtain ore pulp, then described ore pulp is sieved to the granularity P of the ore made in described ore pulp
80be less than or equal to 190 microns; B) sulfuric acid is mixed with ore leach to carry out one section to ore, carry out solid-liquid separation after described one section of leaching terminates to obtain your liquid and one section of leached mud; And C) sulfuric acid mixed with described one section of leached mud and leaches to carry out two sections to described one section of leached mud, carry out solid-liquid separation after described two sections of leachings terminate to obtain leach liquor and two sections of leached muds.
According to the leaching method of the vanadium of the embodiment of the present invention, by utilizing, one section of wet type is Semi-Autogenous carries out ore grinding to the ore after fragmentation, is obtaining granularity P
80when being less than or equal to the ore of 190 microns, not only can simplify the auxiliary process such as griding technology and dust removal by ventilation, reduce production cost and energy consumption, and can also avoid occurring latch up phenomenon in comminution process.
In addition, the leaching method of vanadium according to the above embodiment of the present invention can also have following additional technical characteristic:
According to one embodiment of present invention, the leaching method of described vanadium also comprises: D) wash to obtain washings and tailings to described two sections of leached muds.Most of vanadium thus in described two sections of leached muds can enter into described washings, thus can reduce the vanadiumcontent of described tailings, namely can reduce the loss of vanadium.
According to one embodiment of present invention, described steps A) comprising: A-1) fragmentation is carried out to the raw ore containing vanadium that granularity is less than or equal to 500 millimeters, the ore after fragmentation is sieved and obtains granularity P
80be less than or equal to the ore of 130 millimeters, and to again not carrying out fragmentation and screening by the ore of screening; A-2) to granularity P
80it is Semi-Autogenous to obtain ore pulp that the ore being less than or equal to 130 millimeters carries out one section of wet type, and wherein the addition of Metal Ball is 5%-10%; A-3) described ore pulp is sieved to the granularity P of the ore made in described ore pulp
80be less than or equal to 190 microns, and to not by screening ore again carry out wet type Semi-Autogenous and screening; And A-4) described ore pulp is dewatered to obtain the filter cake that backwater and water content are less than or equal to 15%, described backwater and granularity P
80be less than or equal to the ore mixing of 130 millimeters.Not only can reduce the Semi-Autogenous water loss of described one section of wet type thus, reduce costs, and without the need to discharging backwater, namely can eliminate backwater treatment process, avoiding contaminate environment again.
According to one embodiment of present invention, described one section of leaching carries out 1-7 hour under normal temperature and pH are less than or equal to the condition of 3, and described two sections of leachings carry out 2-9 hour under 60-110 degree Celsius and pH are less than or equal to the condition of 3.The leaching yield (more than 80%) of vanadium can be improved thus.
According to one embodiment of present invention, a part for described washings and described leach liquor mix with ore and leach to carry out described one section to ore, and a part for wherein said washings and the liquid-solid ratio of described leach liquor and ore are (1-5): 1.By utilizing described leach liquor and described washings to carry out described one section of leaching to ore, the leaching yield of vanadium can be improved further.
According to one embodiment of present invention, another part of described washings mixes with described one section of leached mud and leaches to carry out described two sections to described one section of leached mud, and another part of wherein said washings and the liquid-solid ratio of described one section of leached mud are (1-5): 1.By utilizing described washings to carry out described two sections of leachings to described one section of leached mud, the leaching yield of vanadium can be improved further.
According to one embodiment of present invention, when carrying out described two sections of leachings, sulfuric acid and leaching agent is added in another part of described washings and the mixture of described one section of leached mud, wherein the add-on of sulfuric acid is 100-380 kg/ton raw ore, and the add-on of described leaching agent is 2-8 kg/ton raw ore.By adding sulfuric acid, the consumption of sulfuric acid in leaching process can be supplemented the vanadium in described one section of leached mud effectively can be leached.By adding described leaching agent, the leaching velocity of the vanadium in described one section of leached mud can be improved, shortening described two periods of leaching.
According to one embodiment of present invention, described leaching agent is strong oxidizer.
According to one embodiment of present invention, at described step D) in, 5 sections of countercurrent washings are carried out to described two sections of leached muds.The vanadiumcontent of described tailings can be reduced thus further, namely can reduce the loss of vanadium further.
According to one embodiment of present invention, described raw ore is bone coal.Semi-Autogenous by carrying out one section of wet type to the bone coal after fragmentation according to the leaching method of the vanadium of the embodiment of the present invention, thus can avoid occurring latch up phenomenon.
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 schema of the leaching method of vanadium according to an embodiment of the invention; With
Fig. 2 is the schema of the leaching method of vanadium according to another embodiment of the 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 describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of the instruction such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not 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.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can comprise the first and second features and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature immediately below second feature and tiltedly below, or only represent that fisrt feature level height is less than second feature.
Referring to Fig. 1 and Fig. 2, the leaching method according to the vanadium of the embodiment of the present invention is described.As depicted in figs. 1 and 2, comprise the following steps according to the leaching method of the vanadium of the embodiment of the present invention:
A) carry out fragmentation to containing the raw ore of vanadium, then one section of wet type carried out to the ore after fragmentation Semi-Autogenous to obtain ore pulp, then described ore pulp is sieved to the granularity P of the ore made in described ore pulp
80be less than or equal to 190 microns;
B) sulfuric acid is mixed with ore leach to carry out one section to ore, carry out solid-liquid separation after described one section of leaching terminates to obtain your liquid and one section of leached mud; With
C) sulfuric acid is mixed with described one section of leached mud leach to carry out two sections to described one section of leached mud, carry out solid-liquid separation after described two sections of leachings terminate to obtain leach liquor and two sections of leached muds.
In the extract technology of existing vanadium, need to utilize rod mill, ball mill and tuber grinder to carry out multistage grinding to the raw ore containing vanadium, this causes the auxiliary process such as griding technology and dust removal by ventilation complicated, and production cost and energy consumption are all higher, the more important thing is, easily produce latch up phenomenon.
According to the leaching method of the vanadium of the embodiment of the present invention, by utilizing, one section of wet type is Semi-Autogenous carries out ore grinding to the ore after fragmentation, is obtaining granularity P
80when being less than or equal to the ore of 190 microns, not only can simplify the auxiliary process such as griding technology and dust removal by ventilation, reduce production cost and energy consumption, and can also avoid occurring latch up phenomenon in comminution process.
Particularly, described raw ore can be bone coal.Because bone coal is carbonaceous loam mould ore, when therefore adopting multistage grinding technique to carry out ore grinding to bone coal, very serious latch up phenomenon can be produced.Semi-Autogenous by carrying out one section of wet type to the bone coal after fragmentation according to the leaching method of the vanadium of the embodiment of the present invention, thus can avoid occurring latch up phenomenon.Your the liquid described operation can sent into below carries out processing to obtain smart vanadium, such as, can carry out your liquid purification-ammonium salt precipitation-ammonium poly-vanadate-calcining to your liquid described successively.
In one embodiment of the invention, as shown in Figure 2, described steps A) can also comprise:
A-1) to granularity be less than or equal to 500 millimeters carry out fragmentation containing the raw ore of vanadium, the ore after fragmentation is sieved and obtains granularity P
80be less than or equal to the ore of 130 millimeters, and to again not carrying out fragmentation and screening by the ore of screening.
Specifically, stationary screen, trommel screen, vibratory screening apparatus or high frequency fine screen can be utilized to sieve the raw ore containing vanadium to obtain the raw ore containing vanadium that granularity is less than or equal to 500 millimeters.By granularity is less than or equal to 500 millimeters carry out fragmentation containing the raw ore of vanadium and one section of wet type is Semi-Autogenous, granularity P can be obtained more easily
80be less than or equal to the ore of 190 microns.
The raw ore containing vanadium granularity being less than or equal to 500 millimeters carries out fragmentation (such as utilizing jaw crusher, cone crusher, roller crusher, impact crusher etc. to carry out fragmentation), then sieves (such as utilizing stationary screen, trommel screen, vibratory screening apparatus or high frequency fine screen) to obtain granularity P to the ore after fragmentation
80be less than or equal to the ore (granularity of namely sieving 80% in the ore obtained is less than or equal to 130 millimeters) of 130 millimeters.In other words, sieve ore that granularity in the ore that obtains is less than or equal to 130 millimeters to account for and all sieve 80% of the ore obtained.To again fragmentation and screening can not carried out by the ore of screening, can be formed closed circuit to the fragmentation of the raw ore containing vanadium with screening thus.
A-2) to granularity P
80it is Semi-Autogenous to obtain ore pulp (such as utilizing semi-autogenous mill) that the ore being less than or equal to 130 millimeters carries out one section of wet type, and wherein the addition of Metal Ball (such as steel ball) can be 5%-10%(volume ratio).In other words, the volume of the Metal Ball of interpolation is 5%-10% with the ratio of the volume of semi-autogenous mill.Preferably, the addition of Metal Ball can be 6%-8%, better can carry out ore grinding to ore thus.
A-3) (such as utilize stationary screen, trommel screen, vibratory screening apparatus or high frequency fine screen, preferably, utilize high frequency fine screen) is sieved to make the granularity P of the ore in described ore pulp to described ore pulp
80be less than or equal to 190 microns (granularity of namely sieving 80% in the ore in the ore pulp that obtains is less than or equal to 190 microns).In other words, sieve that ore that granularity in the ore in the ore pulp that obtains is less than or equal to 190 microns accounts for the ore in the ore pulp that all sieves and obtain 80%.To again not carrying out the Semi-Autogenous and screening of wet type by the ore of screening, can be formed closed circuit to the fragmentation of ore and screening thus, thus semi-autogenous mill can be made to be in stably running status, granularity P can be obtained more easily
80be less than or equal to the ore of 190 microns.
A-4) described ore pulp is dewatered to obtain the filter cake that backwater and water content are less than or equal to 15%, described backwater can with granularity P
80be less than or equal to the ore mixing of 130 millimeters.In other words, described backwater can be turned back to described steps A-2), by described backwater and granularity P
80the ore mixing being less than or equal to 130 millimeters is Semi-Autogenous to carry out described one section of wet type.Not only can reduce the Semi-Autogenous water loss of described one section of wet type thus, reduce costs, and without the need to discharging backwater, namely can eliminate backwater treatment process, avoiding contaminate environment again.
It will be appreciated by persons skilled in the art that when not dewatering to described ore pulp, sulfuric acid mixes with described ore pulp and leaches to carry out described one section to the ore in described ore pulp.
Advantageously, described one section of leaching can carry out 1-7 hour under normal temperature and pH are less than or equal to the condition of 3, can improve the leaching yield (more than 80%) of vanadium thus.Preferably, described one section of leaching can be carried out under pH is the condition of 1-3.Further preferably, described one section of leaching can be carried out under pH is the condition of 2-3.Most preferably, described one section of leaching can be carried out under pH is the condition of 2.5.Preferably, described one section of leaching can carry out 2-6 hour.Further preferably, described one section of leaching can carry out 3-5 hour.Most preferably, described one section of leaching can carry out 4 hours.
Described two sections of leachings can carry out 2-9 hour under 60-110 degree Celsius and pH are less than or equal to the condition of 3, can improve the leaching yield (more than 80%) of vanadium thus.Specifically, in the extract technology of existing vanadium, before leaching the ore containing vanadium, need to carry out roasting to improve the leaching yield (in the extract technology of existing vanadium, the leaching yield of vanadium is not higher than 70%) of vanadium to the ore containing vanadium.If do not carry out roasting to the ore containing vanadium, then the leaching yield of vanadium can reduce (not higher than 60%) widely.But not only need to consume a large amount of fuel (increase cost) to carrying out roasting containing the ore of vanadium, but also produce a large amount of obnoxious flavoures, contaminate environment.Passing through under the condition of 60-110 degree Celsius, carry out described two sections of leachings according to the leaching method of the vanadium of the embodiment of the present invention, still can obtain the leaching yield (more than 80%) of higher vanadium when not carrying out roasting to the ore containing vanadium.Not only can reduce the consumption of fuel thus, reduce production cost, and can avoid producing obnoxious flavour, preventing pollution environment.
Preferably, described two sections of leachings can be carried out under the condition of 70-100 degree Celsius.Further preferably, described two sections of leachings can be carried out under the condition of 80-90 degree Celsius.Most preferably, described two sections of leachings can be carried out under the condition of 85 degrees Celsius.Preferably, described two sections of leachings can be carried out under pH is the condition of 1-3.Further preferably, described two sections of leachings can be carried out under pH is the condition of 2-3.Most preferably, described two sections of leachings can be carried out under pH is the condition of 2.5.Preferably, described two sections of leachings can carry out 3-8 hour.Further preferably, described two sections of leachings can carry out 4-7 hour.Most preferably, described two sections of leachings can carry out 5-6 hour.
In one embodiment of the invention, as shown in Figure 2, described leach liquor can with granularity P
80be less than or equal to the ore mixing of 190 microns to carry out described one section of leaching to ore.Particularly, described leach liquor can with described steps A-4) filter cake that obtains mixes to carry out described one section and leaches.The liquid-solid ratio of described leach liquor and described filter cake can be determined according to described one section of pH leached.Owing to containing a certain amount of vanadium in described leach liquor, described leach liquor is therefore utilized to carry out to ore the vanadiumcontent that described one section of leaching can improve your liquid described.In other words, by utilizing described leach liquor to carry out described one section of leaching to ore, the leaching yield of vanadium can be improved further.And by utilizing described leach liquor to carry out described one section of leaching to ore, the recycle to the sulfuric acid in described leach liquor can be realized, thus production cost can be reduced further.
It will be appreciated by persons skilled in the art that when coming into effect the leaching method according to the vanadium of the embodiment of the present invention, also not producing described leach liquor.Therefore can by sulfuric acid and described steps A-4) filter cake that obtains mixes to carry out described one section and leaches.Particularly, the concentration of sulfuric acid can be 98%.After described leach liquor to be generated, just can without the need to adding sulfuric acid again.
As shown in Figure 2, in examples more of the present invention, the leaching method according to the vanadium of the embodiment of the present invention can also comprise: D) wash to obtain washings and tailings to described two sections of leached muds.Most of vanadium thus in described two sections of leached muds can enter into described washings, thus can reduce the vanadiumcontent of described tailings, namely can reduce the loss of vanadium.Advantageously, alkaline matter (such as lime) can be utilized to neutralize to obtain described tailings to the described two sections of leached muds after washing, described tailings contaminate environment can be prevented thus.
Particularly, at described step D) in, 5 sections of countercurrent washings are carried out to described two sections of leached muds.The vanadiumcontent of described tailings can be reduced thus further, namely can reduce the loss of vanadium further.
As shown in Figure 2, in an example of the present invention, a part for described washings and described leach liquor can with ore (granularity P
80being less than or equal to the ore of 190 microns) mixing is to carry out described one section of leaching to ore, a part for wherein said washings and the liquid-solid ratio of described leach liquor and ore are (1-5): 1(mass ratio, and following liquid-solid ratio is mass ratio).Particularly, the part of described washings and described leach liquor can with described steps A-4) filter cake that obtains mixes to carry out described one section and leaches.
Owing to containing a certain amount of vanadium in described leach liquor and described washings, described leach liquor and described washings is therefore utilized to carry out to ore the vanadiumcontent that described one section of leaching can improve your liquid described further.In other words, by utilizing described leach liquor and described washings to carry out described one section of leaching to ore, the leaching yield of vanadium can be improved further.And by utilizing described leach liquor and described washings to carry out described one section of leaching to ore, the recycle to the sulfuric acid in described leach liquor and described washings can be realized, thus production cost can be reduced further.
Preferably, a part for described washings and the liquid-solid ratio of described leach liquor and ore are (1-4): 1.Further preferably, a part for described washings and the liquid-solid ratio of described leach liquor and ore are (1.5-3): 1.Most preferably, a part for described washings and the liquid-solid ratio of described leach liquor and ore are (2-2.5): 1.Wherein, a part for described washings and the liquid-solid ratio of described leach liquor and ore can be determined according to described one section of pH leached.
In a concrete example of the present invention, as shown in Figure 2, another part of described washings can mix with described one section of leached mud and leaches to carry out described two sections to described one section of leached mud, and another part of wherein said washings and the liquid-solid ratio of described one section of leached mud can be (1-5): 1(volume mass than).
Owing to containing a certain amount of vanadium in described washings, therefore utilize described washings to carry out to described one section of leached mud the vanadiumcontent that described two sections of leachings can improve described leach liquor further, and then the vanadiumcontent of your liquid described can be improved further.In other words, by utilizing described washings to carry out described two sections of leachings to described one section of leached mud, the leaching yield of vanadium can be improved further.And by utilizing described washings to carry out described two sections of leachings to described one section of leached mud, the recycle to the sulfuric acid in described washings can be realized, thus production cost can be reduced further.
In addition, leach by a part for described washings being used for described one section and another part of described washings being used for described two sections of leachings, thus can avoid discharging described washings, so namely eliminating washings treatment process, avoid contaminate environment again.
Preferably, another part of described washings and the liquid-solid ratio of described one section of leached mud can be (1-4): 1.Further preferably, another part of described washings and the liquid-solid ratio of described one section of leached mud can be (1-3): 1.Most preferably, another part of described washings and the liquid-solid ratio of described one section of leached mud can be (1.5-2): 1.Wherein, another part of described washings and the liquid-solid ratio of described one section of leached mud can be determined according to described two sections of pH leached.
Advantageously, when carrying out described two sections of leachings, can add sulfuric acid and leaching agent in the mixture of another part of described washings and described one section of leached mud, wherein the add-on of sulfuric acid is 100-380 kg/ton raw ore, and the add-on of described leaching agent is 2-8 kg/ton raw ore.By adding sulfuric acid, the consumption of sulfuric acid in leaching process can be supplemented the vanadium in described one section of leached mud effectively can be leached.By adding described leaching agent, the leaching velocity of the vanadium in described one section of leached mud can be improved, shortening described two periods of leaching.Advantageously, described leaching agent can be strong oxidizer, such as Manganse Dioxide, NaClO
3, hydrofluoric acid.
Preferably, the add-on of sulfuric acid is 150-350 kg/ton raw ore, and the add-on of described leaching agent is 3-7 kg/ton raw ore.Further preferably, the add-on of sulfuric acid is 200-280 kg/ton raw ore, and the add-on of described leaching agent is 4-6 kg/ton raw ore.
Embodiment 1
Utilize jaw crusher (U.S. tall and erect ore deposit machine) to carry out fragmentation to the bone coal containing vanadium that granularity is less than or equal to 500 millimeters, then utilize linear vibrating screen (ore deposit, Nanchang machine) sieve the ore after fragmentation and obtain granularity P
80be less than or equal to the ore of 130 millimeters, and to again not carrying out fragmentation and screening by the ore of screening.
Then utilize semi-autogenous mill (middle letter heavy industry) to granularity P
80it is Semi-Autogenous to obtain ore pulp that the ore being less than or equal to 130 millimeters carries out one section of wet type, and wherein the addition of Metal Ball is 5%.High frequency fine screen (MICHAEL DRAKE company) is utilized ore pulp to be sieved to the granularity P of the ore made in ore pulp
80be less than or equal to 190 microns, and to not by screening ore again carry out wet type Semi-Autogenous and screening.Belt filter (prospering together in Yantai) is utilized to dewater to obtain to ore pulp the filter cake that backwater and water content are less than or equal to 15% subsequently.Wherein, backwater can with granularity P
80the ore mixing being less than or equal to 130 millimeters is Semi-Autogenous to carry out one section of wet type.
A part for washings and leach liquor mixed with filter cake and leach to carry out one section to filter cake, the liquid-solid ratio of a part for washings and leach liquor and ore is 5:1.Wherein one section of leaching carries out 1 hour under normal temperature and pH are the condition of 1.Thickener (fragrant in the Huaibei) is utilized to carry out solid-liquid separation to obtain your liquid and one section of leached mud after one section of leaching terminates.
Mixed with one section of leached mud by another part of washings and leach to carry out two sections to one section of leached mud, the liquid-solid ratio of another part of washings and one section of leached mud is 5:1.Simultaneously in the mixture of washings and one section of leached mud, add sulfuric acid and Manganse Dioxide, the add-on of sulfuric acid is double centner/ton raw ore, and the add-on of Manganse Dioxide is 2 kg/ton raw ores.Two sections of leachings carry out 2 hours under 60 degrees Celsius and pH are the condition of 1.Thickener is utilized to carry out solid-liquid separation to obtain leach liquor and two sections of leached muds after two sections of leachings terminate.
5 sections of countercurrent washings are carried out to two sections of leached muds, finally utilizes lime to neutralize to obtain tailings to two sections of leached muds.
In the present embodiment, the leaching yield of vanadium is 85%.
Embodiment 2
Utilize jaw crusher to carry out fragmentation to the bone coal containing vanadium that granularity is less than or equal to 500 millimeters, then utilize linear vibrating screen sieve the ore after fragmentation and obtain granularity P
80be less than or equal to the ore of 130 millimeters, and to again not carrying out fragmentation and screening by the ore of screening.
Then utilize semi-autogenous mill to granularity P
80it is Semi-Autogenous to obtain ore pulp that the ore being less than or equal to 130 millimeters carries out one section of wet type, and wherein the addition of Metal Ball is 10%.High frequency fine screen is utilized ore pulp to be sieved to the granularity P of the ore made in ore pulp
80be less than or equal to 190 microns, and to not by screening ore again carry out wet type Semi-Autogenous and screening.Belt filter is utilized to dewater to obtain to ore pulp the filter cake that backwater and water content are less than or equal to 15% subsequently.Wherein, backwater can with granularity P
80the ore mixing being less than or equal to 130 millimeters is Semi-Autogenous to carry out one section of wet type.
A part for washings and leach liquor mixed with filter cake and leach to carry out one section to filter cake, the liquid-solid ratio of a part for washings and leach liquor and ore is 1:1.Wherein one section of leaching carries out 7 hours under normal temperature and pH are the condition of 3.Thickener is utilized to carry out solid-liquid separation to obtain your liquid and one section of leached mud after one section of leaching terminates.
Mixed with one section of leached mud by another part of washings and leach to carry out two sections to one section of leached mud, the liquid-solid ratio of another part of washings and one section of leached mud is 1:1.Simultaneously in the mixture of washings and one section of leached mud, add sulfuric acid and NaClO
3, the add-on of sulfuric acid is 380 kg/ton raw ores, NaClO
3add-on be 8 kg/ton raw ores.Two sections of leachings carry out 9 hours under 110 degrees Celsius and pH are the condition of 3.Thickener is utilized to carry out solid-liquid separation to obtain leach liquor and two sections of leached muds after two sections of leachings terminate.
5 sections of countercurrent washings are carried out to two sections of leached muds, finally utilizes lime to neutralize to obtain tailings to two sections of leached muds.
In the present embodiment, the leaching yield of vanadium is 87%.
Embodiment 3
Utilize jaw crusher to carry out fragmentation to the bone coal containing vanadium that granularity is less than or equal to 500 millimeters, then utilize linear vibrating screen sieve the ore after fragmentation and obtain granularity P
80be less than or equal to the ore of 130 millimeters, and to again not carrying out fragmentation and screening by the ore of screening.
Then utilize semi-autogenous mill to granularity P
80it is Semi-Autogenous to obtain ore pulp that the ore being less than or equal to 130 millimeters carries out one section of wet type, and wherein the addition of Metal Ball is 7%.High frequency fine screen is utilized ore pulp to be sieved to the granularity P of the ore made in ore pulp
80be less than or equal to 190 microns, and to not by screening ore again carry out wet type Semi-Autogenous and screening.Belt filter is utilized to dewater to obtain to ore pulp the filter cake that backwater and water content are less than or equal to 15% subsequently.Wherein, backwater can with granularity P
80the ore mixing being less than or equal to 130 millimeters is Semi-Autogenous to carry out one section of wet type.
A part for washings and leach liquor mixed with filter cake and leach to carry out one section to filter cake, the liquid-solid ratio of a part for washings and leach liquor and ore is 2.5:1.Wherein one section of leaching carries out 4 hours under normal temperature and pH are the condition of 2.5.Thickener is utilized to carry out solid-liquid separation to obtain your liquid and one section of leached mud after one section of leaching terminates.
Mixed with one section of leached mud by another part of washings and leach to carry out two sections to one section of leached mud, the liquid-solid ratio of another part of washings and one section of leached mud is 2:1.Simultaneously in the mixture of washings and one section of leached mud, add sulfuric acid and hydrofluoric acid, the add-on of sulfuric acid is 380 kg/ton raw ores, and the add-on of hydrofluoric acid is 8 kg/ton raw ores.Two sections of leachings carry out 5 hours under 85 degrees Celsius and pH are the condition of 2.5.Thickener is utilized to carry out solid-liquid separation to obtain leach liquor and two sections of leached muds after two sections of leachings terminate.
5 sections of countercurrent washings are carried out to two sections of leached muds, finally utilizes lime to neutralize to obtain tailings to two sections of leached muds.
In the present embodiment, the leaching yield of vanadium is 89%.
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 (8)
1. a leaching method for vanadium, is characterized in that, comprises the following steps:
A) to granularity be less than or equal to 500 millimeters carry out fragmentation containing the raw ore of vanadium, the ore after fragmentation is sieved and obtains granularity P
80be less than or equal to the ore of 130 millimeters, and to again not carrying out fragmentation and screening by the ore of screening;
To granularity P
80it is Semi-Autogenous to obtain ore pulp that the ore being less than or equal to 130 millimeters carries out one section of wet type, and wherein the addition of Metal Ball is 5-10 volume %;
High frequency fine screen is adopted described ore pulp to be sieved to the granularity P of the ore made in described ore pulp
80be less than or equal to 190 microns, and to not by screening ore again carry out wet type Semi-Autogenous and screening;
Described ore pulp is dewatered to obtain the filter cake that backwater and water content are less than or equal to 15%, described backwater and granularity P
80be less than or equal to the ore mixing of 130 millimeters;
B) sulfuric acid is mixed with filter cake leach to carry out one section to filter cake, carry out solid-liquid separation after described one section of leaching terminates to obtain your liquid and one section of leached mud; With
C) sulfuric acid mixed with described one section of leached mud leach to carry out two sections to described one section of leached mud, carry out solid-liquid separation after described two sections of leachings terminate to obtain leach liquor and two sections of leached muds,
Wherein,
Described one section of leaching carries out 1-7 hour under normal temperature and pH are less than or equal to the condition of 3, and described two sections of leachings carry out 2-9 hour under 60-110 degree Celsius and pH are less than or equal to the condition of 3.
2. the leaching method of vanadium according to claim 1, is characterized in that, also comprises:
D) wash to obtain washings and tailings to described two sections of leached muds.
3. the leaching method of vanadium according to claim 2, it is characterized in that, a part for described washings and described leach liquor mix with ore and leach to carry out described one section to ore, a part for wherein said washings and the liquid-solid ratio of described leach liquor and ore are (1-5): 1, and described liquid-solid ratio is mass ratio.
4. the leaching method of vanadium according to claim 3, is characterized in that, another part of described washings mixes with described one section of leached mud and leaches to carry out described two sections to described one section of leached mud.
5. the leaching method of vanadium according to claim 4, it is characterized in that, when carrying out described two sections of leachings, sulfuric acid and leaching agent is added in another part of described washings and the mixture of described one section of leached mud, wherein the add-on of sulfuric acid is 100-380 kg/ton raw ore, and the add-on of described leaching agent is 2-8 kg/ton raw ore.
6. the leaching method of vanadium according to claim 5, is characterized in that, described leaching agent is strong oxidizer.
7. the leaching method of vanadium according to claim 2, is characterized in that, at described step D) in, 5 sections of countercurrent washings are carried out to described two sections of leached muds.
8. the leaching method of the vanadium according to any one of claim 1-7, is characterized in that, described raw ore is bone coal.
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| CN103421964B (en) * | 2013-08-26 | 2014-12-03 | 武汉科技大学 | Method for leaching vanadium from stone coal containing vanadium |
| CN104046786B (en) * | 2013-10-15 | 2016-08-31 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method reclaiming metal from vanadium slag |
| CN105695760B (en) * | 2016-03-02 | 2018-05-29 | 东北大学 | A kind of method of two sections of counterflow leachings of vanadium slag containing chromium type and separation and Extraction vanadium chromium |
| CN106435177A (en) * | 2016-12-05 | 2017-02-22 | 武汉科技大学 | Method for leaching vanadium from vanadium-containing stone coal |
| CN107081203B (en) * | 2017-06-23 | 2019-09-03 | 攀钢集团矿业有限公司 | A kind of iron ore Semi-autogenous Grinding Technology |
| CN109136551B (en) * | 2018-10-29 | 2020-09-08 | 武汉轻工大学 | Method for extracting vanadium from high-calcium stone coal |
| CN109112302B (en) * | 2018-10-29 | 2020-09-08 | 武汉轻工大学 | Method for extracting vanadium from high-carbon stone coal |
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| CN101481755A (en) * | 2009-02-17 | 2009-07-15 | 昆明理工大学 | Method for leaching vanadium from vanadium-containing coal mine |
| CN101935755A (en) * | 2010-09-15 | 2011-01-05 | 长沙达华矿业技术开发有限公司 | Two-stage leaching method for vanadium in vanadium-containing ore |
| CN102059172A (en) * | 2010-11-11 | 2011-05-18 | 攀钢集团冶金工程技术有限公司 | Ore milling method for vanadium-titanium magnetite ore |
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Address after: 330031 No. 888, Qian Hu Road, Hongjiao Island, Nanchang, Jiangxi. Patentee after: China ruim engineering technology Limited by Share Ltd Address before: 330031 No. 888, Qian Hu Road, Hongjiao Island, Nanchang, Jiangxi. Patentee before: China Nerin Engineering Co., Ltd. |