CN103060551A - Method for leaching vanadium - Google Patents
Method for leaching vanadium Download PDFInfo
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- CN103060551A CN103060551A CN2012105907726A CN201210590772A CN103060551A CN 103060551 A CN103060551 A CN 103060551A CN 2012105907726 A CN2012105907726 A CN 2012105907726A CN 201210590772 A CN201210590772 A CN 201210590772A CN 103060551 A CN103060551 A CN 103060551A
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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 that the raw ore that contains vanadium is carried out multistage grinding, this causes the auxiliary processes 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 provides at least a kind of useful commerce to select.For this reason, one object of the present invention is to propose a kind of leaching method of avoiding occurring the vanadium of latch up phenomenon in the 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 may further comprise the steps: A) raw ore that contains vanadium is carried out fragmentation, then the ore after the fragmentation is carried out one section wet type Semi-Autogenous to obtain ore pulp, then described ore pulp is sieved so that the granularity P of the ore in the described ore pulp
80Less than or equal to 190 microns; B) sulfuric acid is mixed ore is carried out one section leaching with ore, carry out solid-liquid separation to obtain your liquid and one section leached mud after described one section leaching finishes; And C) sulfuric acid is mixed that with described one section leached mud described one section leached mud is carried out two sections leachings, carry out solid-liquid separation to obtain leach liquor and two sections leached muds after described two sections leachings finish.
One section wet type is Semi-Autogenous carries out ore grinding to the ore after the fragmentation by utilizing according to the leaching method of the vanadium of the embodiment of the invention, is obtaining granularity P
80In the situation less than or equal to 190 microns ores, not only can simplify the auxiliary processes such as griding technology and dust removal by ventilation, reduce production costs and energy consumption, and in the comminution process, can also avoid occurring latch up phenomenon.
In addition, the leaching method of vanadium according to the above embodiment of the present invention can also have following additional technical characterictic:
According to one embodiment of present invention, the leaching method of described vanadium also comprises: D) described two sections leached muds are washed to obtain washings and tailings.Most of vanadium in described two sections leached muds can enter into described washings thus, thereby 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) granularity is carried out fragmentation less than or equal to 500 millimeters the raw ore that contains vanadium, the ore after the fragmentation is sieved and obtain granularity P
80Less than or equal to 130 millimeters ore, and to again not carrying out fragmentation and screening by the ore that sieves; A-2) to granularity P
80Carry out one section wet type less than or equal to 130 millimeters ores Semi-Autogenous to obtain ore pulp, wherein the addition of Metal Ball is 5%-10%; A-3) described ore pulp is sieved so that the granularity P of the ore in the described ore pulp
80Less than or equal to 190 microns, and to not by the screening ore again carry out wet type Semi-Autogenous and the screening; And A-4) described ore pulp is dewatered to obtain backwater and water content less than or equal to 15% filter cake, described backwater and granularity P
80Mix less than or equal to 130 millimeters ores.Not only can reduce thus described one section water loss that wet type is Semi-Autogenous, reduce cost, and can need not to discharge backwater, namely save the backwater treatment process, avoid again contaminate environment.
According to one embodiment of present invention, described one section leaching was carried out 1-7 hour under less than or equal to 3 condition at normal temperature and pH, and described two sections leachings were carried out 2-9 hour under less than or equal to 3 condition at 60-110 degree centigrade and pH.Can improve thus the leaching yield (more than 80%) of vanadium.
According to one embodiment of present invention, the part of described washings and described leach liquor mix ore to be carried out described one section leaching with ore, and the liquid-solid ratio of the part of wherein said washings and described leach liquor and ore is (1-5): 1.By utilizing described leach liquor and described washings that ore is carried out described one section leaching, can further improve the leaching yield of vanadium.
According to one embodiment of present invention, another part of described washings mixes that with described one section leached mud described one section leached mud is carried out described two sections leachings, and the liquid-solid ratio of another part of wherein said washings and described one section leached mud is (1-5): 1.By utilizing described washings that described one section leached mud is carried out described two sections leachings, can further improve the leaching yield of vanadium.
According to one embodiment of present invention, when carrying out described two sections leachings, in the mixture of another part of described washings and described one section leached mud, add sulfuric acid and leaching agent, 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, can replenish the consumption of sulfuric acid in the leaching process in order to can effectively leach vanadium in described one section leached mud.By adding described leaching agent, can improve the leaching velocity of the vanadium in described one section leached mud, shorten the time of described two sections leachings.
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, described two sections leached muds are carried out 5 sections countercurrent washings.Can further reduce thus the vanadiumcontent of described tailings, namely can further reduce the loss of vanadium.
According to one embodiment of present invention, described raw ore is bone coal.Leaching method according to the vanadium of the embodiment of the invention is Semi-Autogenous by the bone coal after the fragmentation being carried out one section wet type, thereby can avoid occurring latch up phenomenon.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, 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
The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center "; " vertically "; " laterally "; " 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 indications such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only be for convenience of description the present invention and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the invention, the implication of " a plurality of " is two or more, unless clear and definite concrete restriction is arranged in addition.
In the present invention, unless clear and definite regulation and restriction are arranged in addition, broad understanding should be done in the terms such as term " installation ", " linking to each other ", " connection ", " fixing ", for example, can be to be fixedly connected with, and also can be to removably connect, or connect integratedly; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can indirectly link to each other by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.
In the present invention, unless clear and definite regulation and restriction are arranged in addition, First Characteristic Second Characteristic it " on " or D score can comprise that the first and second features directly contact, can comprise that also the first and second features are not directly contacts but by the other feature contact between them.And, First Characteristic Second Characteristic " on ", " top " and " above " comprise First Characteristic directly over Second Characteristic and oblique upper, or only represent that the First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " comprise First Characteristic under the Second Characteristic and tiltedly, or only represent that the First Characteristic level height is less than Second Characteristic.
Below with reference to Fig. 1 and Fig. 2 leaching method according to the vanadium of the embodiment of the invention is described.As depicted in figs. 1 and 2, the leaching method according to the vanadium of the embodiment of the invention may further comprise the steps:
A) raw ore that contains vanadium is carried out fragmentation, then the ore after the fragmentation is carried out one section wet type Semi-Autogenous to obtain ore pulp, then described ore pulp is sieved so that the granularity P of the ore in the described ore pulp
80Less than or equal to 190 microns;
B) sulfuric acid is mixed ore is carried out one section leaching with ore, carry out solid-liquid separation to obtain your liquid and one section leached mud after described one section leaching finishes; With
C) sulfuric acid is mixed that with described one section leached mud described one section leached mud is carried out two sections leachings, carry out solid-liquid separation to obtain leach liquor and two sections leached muds after described two sections leachings finish.
In the extract technology of existing vanadium, need to utilize rod mill, ball mill and tuber grinder that the raw ore that contains vanadium is carried out multistage grinding, this causes the auxiliary processes 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.
One section wet type is Semi-Autogenous carries out ore grinding to the ore after the fragmentation by utilizing according to the leaching method of the vanadium of the embodiment of the invention, is obtaining granularity P
80In the situation less than or equal to 190 microns ores, not only can simplify the auxiliary processes such as griding technology and dust removal by ventilation, reduce production costs and energy consumption, and in the comminution process, can also avoid occurring latch up phenomenon.
Particularly, described raw ore can be bone coal.Because bone coal is carbonaceous loam mould ore, can produce very serious latch up phenomenon when therefore adopting multistage grinding technique that bone coal is carried out ore grinding.Leaching method according to the vanadium of the embodiment of the invention is Semi-Autogenous by the bone coal after the fragmentation being carried out one section wet type, thereby can avoid occurring latch up phenomenon.The operation described your liquid can be sent into the back is processed in order to obtain smart vanadium, for example can carry out your liquid purification-ammonium salt precipitation-ammonium poly-vanadate-calcining to described your liquid successively.
In one embodiment of the invention, as shown in Figure 2, described steps A) can also comprise:
A-1) granularity is carried out fragmentation less than or equal to 500 millimeters the raw ore that contains vanadium, the ore after the fragmentation is sieved and obtain granularity P
80Less than or equal to 130 millimeters ore, and to again not carrying out fragmentation and screening by the ore that sieves.
Particularly, can utilize stationary screen, trommel screen, vibratory screening apparatus or high frequency fine screen that the raw ore that contains vanadium is sieved in order to obtain granularity less than or equal to 500 millimeters the raw ore that contains vanadium.By granularity being carried out fragmentation less than or equal to 500 millimeters the raw ore that contains vanadium and one section wet type is Semi-Autogenous, can obtain more easily granularity P
80Ore less than or equal to 190 microns.
Granularity is carried out fragmentation (such as utilizing jaw crusher, cone crusher, roller crusher, impact crusher etc. to carry out fragmentation) less than or equal to 500 millimeters the raw ore that contains vanadium, then the ore after the fragmentation is sieved (for example utilizing stationary screen, trommel screen, vibratory screening apparatus or high frequency fine screen) in order to obtain granularity P
80Less than or equal to 130 millimeters ores (i.e. the granularity of 80% in the ore that screening obtains is less than or equal to 130 millimeters).In other words, granularity accounts for 80% of ore that whole screenings obtain less than or equal to 130 millimeters ore in the ore that obtains of screening.Can again not carry out fragmentation and screening to the ore by screening, can form closed circuit to fragmentation and the screening of the raw ore that contains vanadium thus.
A-2) to granularity P
80Carry out one section wet type less than or equal to 130 millimeters ores Semi-Autogenous to obtain ore pulp (for example utilizing semi-autogenous mill), wherein the addition of Metal Ball (for example steel ball) can be the 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%, can better carry out ore grinding to ore thus.
A-3) described ore pulp is sieved (for example utilize stationary screen, trommel screen, vibratory screening apparatus or high frequency fine screen, preferably, utilize high frequency fine screen) so that the granularity P of the ore in the described ore pulp
80Less than or equal to 190 microns (i.e. the granularity of 80% in the ore in the ore pulp that screening obtains is less than or equal to 190 microns).In other words, granularity accounts for 80% of ore in the ore pulp that whole screenings obtain less than or equal to 190 microns ore in the ore in the ore pulp that obtains of screening.The ore by screening is not carried out the Semi-Autogenous and screening of wet type again, can form the fragmentation of ore and screening thus closed circuit, thereby can make semi-autogenous mill be in stably running status, can obtain more easily granularity P
80Ore less than or equal to 190 microns.
A-4) described ore pulp is dewatered to obtain backwater and water content less than or equal to 15% filter cake, described backwater can with granularity P
80Mix less than or equal to 130 millimeters ores.In other words, described backwater can be turned back to described steps A-2), with described backwater and granularity P
80Mix in order to carry out described one section wet type Semi-Autogenous less than or equal to 130 millimeters ores.Not only can reduce thus described one section water loss that wet type is Semi-Autogenous, reduce cost, and can need not to discharge backwater, namely save the backwater treatment process, avoid again contaminate environment.
It will be appreciated by persons skilled in the art that when described ore pulp not being dewatered, sulfuric acid mixes with described ore pulp in order to the ore in the described ore pulp is carried out described one section leaching.
Advantageously, described one section leaching can be carried out 1-7 hour under less than or equal to 3 condition at normal temperature and pH, can improve thus the leaching yield (more than 80%) of vanadium.Preferably, described one section leaching can be carried out under pH is the condition of 1-3.Further preferably, described one section leaching can be carried out under pH is the condition of 2-3.Most preferably, described one section leaching can be carried out under pH is 2.5 condition.Preferably, described one section leaching can be carried out 2-6 hour.Further preferably, described one section leaching can be carried out 3-5 hour.Most preferably, described one section leaching can be carried out 4 hours.
Described two sections leachings can be carried out 2-9 hour under less than or equal to 3 condition at 60-110 degree centigrade and pH, can improve thus the leaching yield (more than 80%) of vanadium.Particularly, in the extract technology of existing vanadium, before the ore that contains vanadium is leached, need to carry out roasting to the ore that contains vanadium in order to improve the leaching yield (in the extract technology of existing vanadium, the leaching yield of vanadium is not higher than 70%) of vanadium.If the ore that contains vanadium is not carried out roasting, then the leaching yield of vanadium can reduce (not being higher than 60%) widely.Not only need to consume a large amount of fuel (increase cost) yet the ore that contains vanadium is carried out roasting, but also produce a large amount of obnoxious flavoures, contaminate environment.By under 60-110 degree centigrade condition, carrying out described two sections leachings, in the situation of ore that contains vanadium not being carried out roasting, still can obtain the leaching yield (more than 80%) of higher vanadium according to the leaching method of the vanadium of the embodiment of the invention.Not only can reduce thus the consumption of fuel, reduce production costs, and can avoid producing obnoxious flavour, prevent contaminate environment.
Preferably, described two sections leachings can be carried out under 70-100 degree centigrade condition.Further preferably, described two sections leachings can be carried out under 80-90 degree centigrade condition.Most preferably, described two sections leachings can be carried out under 85 degrees centigrade condition.Preferably, described two sections leachings can be carried out under pH is the condition of 1-3.Further preferably, described two sections leachings can be carried out under pH is the condition of 2-3.Most preferably, described two sections leachings can be carried out under pH is 2.5 condition.Preferably, described two sections leachings can be carried out 3-8 hour.Further preferably, described two sections leachings can be carried out 4-7 hour.Most preferably, described two sections leachings can be carried out 5-6 hour.
In one embodiment of the invention, as shown in Figure 2, described leach liquor can with granularity P
80Mix ore is carried out described one section leaching less than or equal to 190 microns ores.Particularly, described leach liquor can with described steps A-4) filter cake that obtains mixes to carry out described one section leaching.The liquid-solid ratio of described leach liquor and described filter cake can be determined according to the pH of described one section leaching.Owing to containing a certain amount of vanadium in the described leach liquor, therefore utilizing described leach liquor that ore is carried out the vanadiumcontent that described one section leaching can improve described your liquid.In other words, by utilizing described leach liquor ore is carried out described one section leaching, can further improve the leaching yield of vanadium.And by utilizing described leach liquor that ore is carried out described one section leaching, can realize the recycle to the sulfuric acid in the described leach liquor, thereby can further reduce production costs.
It will be appreciated by persons skilled in the art that when the leaching method that comes into effect according to the vanadium of the embodiment of the invention, also do not produce described leach liquor.Therefore can be with sulfuric acid and described steps A-4) filter cake that obtains mixes to carry out described one section leaching.Particularly, the concentration of sulfuric acid can be 98%.After the described leach liquor to be generated, just can need not to add again sulfuric acid.
As shown in Figure 2, in examples more of the present invention, can also comprise according to the leaching method of the vanadium of the embodiment of the invention: D) described two sections leached muds are washed to obtain washings and tailings.Most of vanadium in described two sections leached muds can enter into described washings thus, thereby can reduce the vanadiumcontent of described tailings, namely can reduce the loss of vanadium.Advantageously, can utilize alkaline matter (for example lime) that the described two sections leached muds after washing are neutralized in order to obtain described tailings, can prevent thus described tailings contaminate environment.
Particularly, at described step D) in, described two sections leached muds are carried out 5 sections countercurrent washings.Can further reduce thus the vanadiumcontent of described tailings, namely can further reduce the loss of vanadium.
As shown in Figure 2, in an example of the present invention, the part of described washings and described leach liquor can with ore (granularity P
80Ore less than or equal to 190 microns) mix ore is carried out described one section leaching, the liquid-solid ratio of the part of wherein said washings and described leach liquor and ore is (1-5): the 1(mass ratio, 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 leaching.
Owing to containing a certain amount of vanadium in described leach liquor and the described washings, therefore utilizing described leach liquor and described washings that ore is carried out the vanadiumcontent that described one section leaching can further improve described your liquid.In other words, by utilizing described leach liquor and described washings ore is carried out described one section leaching, can further improve the leaching yield of vanadium.And by utilizing described leach liquor and described washings that ore is carried out described one section leaching, can realize the recycle to the sulfuric acid in described leach liquor and the described washings, thereby can further reduce production costs.
Preferably, the liquid-solid ratio of the part of described washings and described leach liquor and ore is (1-4): 1.Further preferably, the liquid-solid ratio of the part of described washings and described leach liquor and ore is (1.5-3): 1.Most preferably, the liquid-solid ratio of the part of described washings and described leach liquor and ore is (2-2.5): 1.Wherein, the liquid-solid ratio of the part of described washings and described leach liquor and ore can be determined according to the pH of described one section leaching.
In a concrete example of the present invention, as shown in Figure 2, another part of described washings can mix that described one section leached mud is carried out described two sections leachings with described one section leached mud, and the liquid-solid ratio of another part of wherein said washings and described one section leached mud can be (1-5): 1(volume mass ratio).
Owing to containing a certain amount of vanadium in the described washings, therefore utilizing described washings that described one section leached mud is carried out the vanadiumcontent that described two sections leachings can further improve described leach liquor, and then can further improve the vanadiumcontent of described your liquid.In other words, by utilizing described washings described one section leached mud is carried out described two sections leachings, can further improve the leaching yield of vanadium.And by utilizing described washings that described one section leached mud is carried out described two sections leachings, can realize the recycle to the sulfuric acid in the described washings, thereby can further reduce production costs.
In addition, leach and another part of described washings is used for described two sections leachings by the part of described washings being used for described one section, thereby can avoid discharging described washings, so namely saved the washings treatment process, avoid again contaminate environment.
Preferably, the liquid-solid ratio of another part of described washings and described one section leached mud can be (1-4): 1.Further preferably, the liquid-solid ratio of another part of described washings and described one section leached mud can be (1-3): 1.Most preferably, the liquid-solid ratio of another part of described washings and described one section leached mud can be (1.5-2): 1.Wherein, the liquid-solid ratio of another part of described washings and described one section leached mud can be determined according to the pH of described two sections leachings.
Advantageously, when carrying out described two sections leachings, can add sulfuric acid and leaching agent in the mixture of another part of described washings and described one section 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, can replenish the consumption of sulfuric acid in the leaching process in order to can effectively leach vanadium in described one section leached mud.By adding described leaching agent, can improve the leaching velocity of the vanadium in described one section leached mud, shorten the time of described two sections leachings.Advantageously, described leaching agent can be strong oxidizer, for example 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) that granularity is carried out fragmentation less than or equal to 500 millimeters the bone coal that contains vanadium, then utilize linear vibrating screen (ore deposit, Nanchang machine) that the ore after the fragmentation is sieved and obtain granularity P
80Less than or equal to 130 millimeters ore, and to again not carrying out fragmentation and screening by the ore that sieves.
Then utilize semi-autogenous mill (middle letter heavy industry) to granularity P
80Carry out one section wet type less than or equal to 130 millimeters ores Semi-Autogenous to obtain ore pulp, wherein the addition of Metal Ball is 5%.Utilize high frequency fine screen (MICHAEL DRAKE company) that ore pulp is sieved so that the granularity P of the ore in the ore pulp
80Less than or equal to 190 microns, and to not by the screening ore again carry out wet type Semi-Autogenous and the screening.Utilize subsequently belt filter (prospering together in Yantai) that ore pulp is dewatered to obtain backwater and water content less than or equal to 15% filter cake.Wherein, backwater can with granularity P
80Mix in order to carry out one section wet type Semi-Autogenous less than or equal to 130 millimeters ores.
A part and the leach liquor of washings are mixed filter cake to be carried out one section leaching with filter cake, the liquid-solid ratio of the part of washings and leach liquor and ore is 5:1.Wherein one section leaching is to carry out 1 hour under 1 the condition at normal temperature and pH.After finishing, one section leaching utilize thickener (fragrant in the Huaibei) to carry out solid-liquid separation to obtain your liquid and one section leached mud.
Another part of washings is mixed that with one section leached mud one section leached mud is carried out two sections leachings, and the liquid-solid ratio of another part of washings and one section leached mud is 5:1.Add sulfuric acid and Manganse Dioxide simultaneously in the mixture of washings and one section leached mud, 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 leachings are to carry out 2 hours under 1 the condition at 60 degrees centigrade and pH.After finishing, two sections leachings utilize thickener to carry out solid-liquid separation to obtain leach liquor and two sections leached muds.
Two sections leached muds are carried out 5 sections countercurrent washings, utilize at last lime that two sections leached muds are neutralized to obtain tailings.
In the present embodiment, the leaching yield of vanadium is 85%.
Embodiment 2
Utilize jaw crusher that granularity is carried out fragmentation less than or equal to 500 millimeters the bone coal that contains vanadium, the ore after then utilizing linear vibrating screen to fragmentation sieves and obtains granularity P
80Less than or equal to 130 millimeters ore, and to again not carrying out fragmentation and screening by the ore that sieves.
Then utilize semi-autogenous mill to granularity P
80Carry out one section wet type less than or equal to 130 millimeters ores Semi-Autogenous to obtain ore pulp, wherein the addition of Metal Ball is 10%.Utilize high frequency fine screen ore pulp to be sieved so that the granularity P of the ore in the ore pulp
80Less than or equal to 190 microns, and to not by the screening ore again carry out wet type Semi-Autogenous and the screening.Utilize subsequently the belt filter that ore pulp is dewatered to obtain backwater and water content less than or equal to 15% filter cake.Wherein, backwater can with granularity P
80Mix in order to carry out one section wet type Semi-Autogenous less than or equal to 130 millimeters ores.
A part and the leach liquor of washings are mixed filter cake to be carried out one section leaching with filter cake, the liquid-solid ratio of the part of washings and leach liquor and ore is 1:1.Wherein one section leaching is to carry out 7 hours under 3 the condition at normal temperature and pH.After finishing, one section leaching utilize thickener to carry out solid-liquid separation to obtain your liquid and one section leached mud.
Another part of washings is mixed that with one section leached mud one section leached mud is carried out two sections leachings, and the liquid-solid ratio of another part of washings and one section leached mud is 1:1.In the mixture of washings and one section leached mud, add sulfuric acid and NaClO simultaneously
3, the add-on of sulfuric acid is 380 kg/ton raw ores, NaClO
3Add-on be 8 kg/ton raw ores.Two sections leachings are to carry out 9 hours under 3 the condition at 110 degrees centigrade and pH.After finishing, two sections leachings utilize thickener to carry out solid-liquid separation to obtain leach liquor and two sections leached muds.
Two sections leached muds are carried out 5 sections countercurrent washings, utilize at last lime that two sections leached muds are neutralized to obtain tailings.
In the present embodiment, the leaching yield of vanadium is 87%.
Embodiment 3
Utilize jaw crusher that granularity is carried out fragmentation less than or equal to 500 millimeters the bone coal that contains vanadium, the ore after then utilizing linear vibrating screen to fragmentation sieves and obtains granularity P
80Less than or equal to 130 millimeters ore, and to again not carrying out fragmentation and screening by the ore that sieves.
Then utilize semi-autogenous mill to granularity P
80Carry out one section wet type less than or equal to 130 millimeters ores Semi-Autogenous to obtain ore pulp, wherein the addition of Metal Ball is 7%.Utilize high frequency fine screen ore pulp to be sieved so that the granularity P of the ore in the ore pulp
80Less than or equal to 190 microns, and to not by the screening ore again carry out wet type Semi-Autogenous and the screening.Utilize subsequently the belt filter that ore pulp is dewatered to obtain backwater and water content less than or equal to 15% filter cake.Wherein, backwater can with granularity P
80Mix in order to carry out one section wet type Semi-Autogenous less than or equal to 130 millimeters ores.
A part and the leach liquor of washings are mixed filter cake to be carried out one section leaching with filter cake, the liquid-solid ratio of the part of washings and leach liquor and ore is 2.5:1.Wherein one section leaching is to carry out 4 hours under 2.5 the condition at normal temperature and pH.After finishing, one section leaching utilize thickener to carry out solid-liquid separation to obtain your liquid and one section leached mud.
Another part of washings is mixed that with one section leached mud one section leached mud is carried out two sections leachings, and the liquid-solid ratio of another part of washings and one section leached mud is 2:1.Add sulfuric acid and hydrofluoric acid simultaneously in the mixture of washings and one section leached mud, 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 leachings are to carry out 5 hours under 2.5 the condition at 85 degrees centigrade and pH.After finishing, two sections leachings utilize thickener to carry out solid-liquid separation to obtain leach liquor and two sections leached muds.
Two sections leached muds are carried out 5 sections countercurrent washings, utilize at last lime that two sections leached muds are neutralized to obtain tailings.
In the present embodiment, the leaching yield of vanadium is 89%.
In the description of this specification sheets, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or the example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although the above has illustrated and has described embodiments of the invention, 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 is not in the situation that break away from principle of the present invention and aim can change above-described embodiment within the scope of the invention, modification, replacement and modification.
Claims (10)
1. the leaching method of a vanadium is characterized in that, may further comprise the steps:
A) raw ore that contains vanadium is carried out fragmentation, then the ore after the fragmentation is carried out one section wet type Semi-Autogenous to obtain ore pulp, then described ore pulp is sieved so that the granularity P of the ore in the described ore pulp
80Less than or equal to 190 microns;
B) sulfuric acid is mixed ore is carried out one section leaching with ore, carry out solid-liquid separation to obtain your liquid and one section leached mud after described one section leaching finishes; With
C) sulfuric acid is mixed that with described one section leached mud described one section leached mud is carried out two sections leachings, carry out solid-liquid separation to obtain leach liquor and two sections leached muds after described two sections leachings finish.
2. the leaching method of vanadium according to claim 1 is characterized in that, also comprises:
D) described two sections leached muds are washed to obtain washings and tailings.
3. the leaching method of vanadium according to claim 1 is characterized in that, described steps A) comprising:
A-1) granularity is carried out fragmentation less than or equal to 500 millimeters the raw ore that contains vanadium, the ore after the fragmentation is sieved and obtain granularity P
80Less than or equal to 130 millimeters ore, and to again not carrying out fragmentation and screening by the ore that sieves;
A-2) to granularity P
80Carry out one section wet type less than or equal to 130 millimeters ores Semi-Autogenous to obtain ore pulp, wherein the addition of Metal Ball is 5%-10%;
A-3) described ore pulp is sieved so that the granularity P of the ore in the described ore pulp
80Less than or equal to 190 microns, and to not by the screening ore again carry out wet type Semi-Autogenous and the screening; With
A-4) described ore pulp is dewatered to obtain backwater and water content less than or equal to 15% filter cake, described backwater and granularity P
80Mix less than or equal to 130 millimeters ores.
4. the leaching method of each described vanadium according to claim 1-3, it is characterized in that, described one section leaching was carried out 1-7 hour under less than or equal to 3 condition at normal temperature and pH, and described two sections leachings were carried out 2-9 hour under less than or equal to 3 condition at 60-110 degree centigrade and pH.
5. the leaching method of vanadium according to claim 2, it is characterized in that, the part of described washings and described leach liquor mix ore to be carried out described one section leaching with ore, the liquid-solid ratio of the part of wherein said washings and described leach liquor and ore is (1-5): 1.
6. the leaching method of vanadium according to claim 5, it is characterized in that, another part of described washings mixes that with described one section leached mud described one section leached mud is carried out described two sections leachings, and the liquid-solid ratio of another part of wherein said washings and described one section leached mud is (1-5): 1.
7. the leaching method of vanadium according to claim 6, it is characterized in that, when carrying out described two sections leachings, in the mixture of another part of described washings and described one section leached mud, add sulfuric acid and leaching agent, 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.
8. the leaching method of vanadium according to claim 7 is characterized in that, described leaching agent is strong oxidizer.
9. the leaching method of vanadium according to claim 2 is characterized in that, at described step D) in, described two sections leached muds are carried out 5 sections countercurrent washings.
10. the leaching method of each described vanadium is characterized in that according to claim 1-9, and described raw ore is bone coal.
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| CN103421964A (en) * | 2013-08-26 | 2013-12-04 | 武汉科技大学 | Method for leaching vanadium from stone coal containing vanadium |
| CN104046786A (en) * | 2013-10-15 | 2014-09-17 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for recovering metals from vanadium slag |
| CN105695760A (en) * | 2016-03-02 | 2016-06-22 | 东北大学 | Method for carrying out two-stage countercurrent leaching on chromium-containing vanadium slag and extracting vanadium and chromium in separating manner |
| CN106435177A (en) * | 2016-12-05 | 2017-02-22 | 武汉科技大学 | Method for leaching vanadium from vanadium-containing stone coal |
| CN107081203A (en) * | 2017-06-23 | 2017-08-22 | 攀钢集团矿业有限公司 | A kind of iron ore Semi-autogenous Grinding Technology |
| CN109112302A (en) * | 2018-10-29 | 2019-01-01 | 武汉轻工大学 | A method of extracting vanadium from high-carbon bone coal |
| CN109136551A (en) * | 2018-10-29 | 2019-01-04 | 武汉轻工大学 | A method of extracting vanadium from high calcium bone coal |
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| CN103421964A (en) * | 2013-08-26 | 2013-12-04 | 武汉科技大学 | Method for leaching vanadium from stone coal containing vanadium |
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| CN105695760A (en) * | 2016-03-02 | 2016-06-22 | 东北大学 | Method for carrying out two-stage countercurrent leaching on chromium-containing vanadium slag and extracting vanadium and chromium in separating manner |
| 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 |
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| CN107081203A (en) * | 2017-06-23 | 2017-08-22 | 攀钢集团矿业有限公司 | A kind of iron ore Semi-autogenous Grinding Technology |
| 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 |
| CN109112302A (en) * | 2018-10-29 | 2019-01-01 | 武汉轻工大学 | A method of extracting vanadium from high-carbon bone coal |
| CN109136551A (en) * | 2018-10-29 | 2019-01-04 | 武汉轻工大学 | A method of extracting vanadium from high calcium bone coal |
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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. |