CN103898336B - Method for treating zinc roasted ore - Google Patents
Method for treating zinc roasted ore Download PDFInfo
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- CN103898336B CN103898336B CN201410112042.4A CN201410112042A CN103898336B CN 103898336 B CN103898336 B CN 103898336B CN 201410112042 A CN201410112042 A CN 201410112042A CN 103898336 B CN103898336 B CN 103898336B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a method for treating zinc roasted ore. The method comprises the following steps: (1) zinc roasted ore is mixed with an oxidant and an electrolyte for neutral leaching treatment, and the neutral leaching solution undergoes first thickening treatment; (2) the first base solution undergoes neutral treatment, and the neutralized solution undergoes second thickening treatment; (3) the second base solution undergoes high acid leaching treatment, and the solution treated by high acid leaching undergoes third thickening treatment; (4) the third base solution undergoes superacid leaching treatment, and the solution treated by superacid leaching undergoes a fourth thickening treatment; (5) the fourth base solution undergoes first washing filtering; (6) the second supernatant undergoes iron removal based on spraying by using zinc roasted ore and/or zinc oxide dust; (7) iron ore slurry undergoes stage treatment, and the mixed solution undergoes fifth thickening treatment; (8) the fifth base solution undergoes second washing filtering. With the method, the recovery rate of valuable metals can be remarkably improved.
Description
Technical field
The present invention relates to field of metallurgy, specifically, the present invention relates to a kind of method processing zinc roasted ore.
Background technology
The leading technique of current zinc hydrometallurgy is divided into the large class of the direct leaching two of sulfuric acid+leaching and zinc ore concentrate, wherein sulfuric acid+leaching comprises again conventional two sections of leachings and hot acid leaching, for the difference of heavy iron method, hot acid leaches and has derived again the techniques such as jarosite process, goethite process, hematite process.The direct leaching of zinc ore concentrate comprises pressure leaching and normobaric oxygen soaks two kinds.All there is the deficiency of self in various technique above.
Summary of the invention
The present invention is intended to one of solve the problems of the technologies described above at least to a certain extent.For this reason, one object of the present invention is to propose a kind of method processing zinc roasted ore, and the method can significantly improve the recovery utilization rate of valuable metal.
In one aspect of the invention, the present invention proposes a kind of method processing zinc roasted ore.According to embodiments of the invention, the method comprises:
(1) zinc roasted ore mixed with oxygenant and electrolytic solution and carry out meutral innersion process, and the first dense process is carried out to the meutral innersion liquid obtained, to obtain the first supernatant liquor and the first end liquid respectively;
(2) described first end liquid step (1) obtained carries out neutralizing treatment, and carries out the second dense process to the solution through neutralizing treatment obtained, to obtain the second supernatant liquor and the second end liquid respectively;
(3) described second end liquid step (2) obtained carries out high acidic oils process, and carries out the 3rd dense process to the solution through high acidic oils process obtained, to obtain the 3rd supernatant liquor and the 3rd end liquid respectively;
(4) described 3rd end liquid step (3) obtained carries out super acid and leaches process, and carries out the 4th dense process, to obtain the 4th supernatant liquor and the 4th end liquid respectively to the solution through super acid leaching process obtained;
(5) described 4th end liquid step (4) obtained carries out the first washing and filtering, to obtain lead smelting gas and the first filtrate respectively;
(6) zinc roasted ore and/or zinc oxide fumes is utilized to carry out spray deironing process to the second supernatant liquor that step (2) obtains, to obtain iron ore slurry;
(7) described iron ore slurry step (6) obtained carries out stage treatment, to obtain coarse sand and mixing solutions respectively, and carries out the 5th dense process to described mixing solutions, to obtain the 5th supernatant liquor and the 5th end liquid respectively; And
(8) described 5th end liquid step (7) obtained carries out the second washing and filtering, to obtain scum and the second filtrate respectively.
Method according to the process zinc roasted ore of the embodiment of the present invention can significantly improve scum quality by employing super acid leaching treatment process with using zinc roasted ore or oxygenant flue dust as the neutralizing agent of spray deironing treating processes, and significantly reduce lead smelting gas slag rate, in gained lead smelting gas, plumbous silver is of high grade simultaneously, in addition, obtain lead smelting gas and can deliver to plumbous reduction furnace for smelting direct production lead bullion, thus it is complementary to realize plumbous zinc, wet fire is compatible, the technique object of energy-saving and emission-reduction, new way is opened for reducing zinc hydrometallurgy production cost, achieve smelting waste slag innoxious, the object of resource utilization, facilitate the lifting of Business Economic Benefit.
In addition, the method for process zinc roasted ore according to the above embodiment of the present invention can also have following additional technical characteristic:
In some embodiments of the invention, the method for described process zinc roasted ore comprises further: described first supernatant liquor that step (1) obtains by (9) carries out purifying treatment; (10) the described coarse sand that described 3rd supernatant liquor step (3) obtained and step (7) obtain returns and carries out described neutralizing treatment; (11) described first filtrate the returning that described 4th supernatant liquor step (4) obtained and step (5) obtain carries out described high acidic oils process; And described second filtrate the returning that (12) described 5th supernatant liquor of step (7) being obtained and step (8) obtain carries out described meutral innersion process.Thus, the recovery utilization rate of valuable metal can be significantly improved.
In some embodiments of the invention, described oxygenant is be selected from least one in manganese mineral powder, potassium permanganate, air and oxygen.Thus, the recovery utilization rate of valuable metal can be improved further.
In some embodiments of the invention, described electrolytic solution is zinc electrolytic waste liquid.Thus, the recovery utilization rate of valuable metal can be improved further.
In some embodiments of the invention, described meutral innersion process is carried out completing for 1.5 ~ 2.5 hours under the terminal acidity of 4.8 ~ 5.2 with pH at the temperature of 50 ~ 70 degrees Celsius.Thus, the recovery utilization rate of valuable metal can be improved further.
In some embodiments of the invention, the iron concentration in described first supernatant liquor is lower than 30mg/L.Thus, the recovery utilization rate of valuable metal can be improved further.
In some embodiments of the invention, in described first end liquid, the content of ferro element is 10 ~ 15wt%.Thus, the recovery utilization rate of valuable metal can be improved further.
In some embodiments of the invention, described neutralizing treatment carries out completing for 1.5 ~ 2.5 hours under the terminal acidity of 1.5 ~ 2.5 with pH at the temperature of 60 ~ 75 degrees Celsius.Thus, the recovery utilization rate of valuable metal can be improved further.
In some embodiments of the invention, described high acidic oils process be at the temperature of 85 ~ 95 degrees Celsius and terminal acidity be carry out at least 2 hours under 40 ~ 70g/L condition.Thus, the recovery utilization rate of valuable metal can be improved further.
In some embodiments of the invention, described super acid leaches process is at the temperature of 85 ~ 95 degrees Celsius and terminal acidity is carry out at least 2 hours under 100 ~ 120g/L condition.Thus, the recovery utilization rate of valuable metal can be improved further.
In some embodiments of the invention, in described second supernatant liquor, iron concentration is 5 ~ 35g/L.Thus, the recovery utilization rate of valuable metal can be improved further.
In some embodiments of the invention, described spray deironing process carries out under the terminal acidity of 3.0 ~ 4.5 with pH at the temperature of 80 ~ 90 degrees Celsius.Thus, the recovery utilization rate of valuable metal can be improved further.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the schematic flow sheet of the method processing zinc roasted ore according to an embodiment of the invention;
Fig. 2 is the schematic flow sheet of the method for process zinc roasted ore according to another embodiment of the present invention;
Fig. 3 is the schematic flow sheet of the method for process zinc roasted ore according to another embodiment of the present invention;
Fig. 4 is the structural representation of the system of the process zinc roasted ore of the method for the process zinc roasted ore implementing one embodiment of the invention;
Fig. 5 is the structural representation of the system of the process zinc roasted ore of the method for the process zinc roasted ore implementing another embodiment of the present invention;
Fig. 6 is the structural representation of the system of the process zinc roasted ore of the method for the process zinc roasted ore implementing 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 describing the invention, it is to be appreciated that term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or the implicit 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 one aspect of the invention, the present invention proposes a kind of method processing zinc roasted ore.Method below with reference to the process zinc roasted ore of Fig. 1-3 pairs of embodiment of the present invention is described in detail.According to embodiments of the invention, the method comprises:
S100: meutral innersion process
According to embodiments of the invention, roasted ore is mixed with oxygenant and electrolytic solution and carries out meutral innersion process, thus meutral innersion liquid can be obtained.According to embodiments of the invention, the composition of zinc roasted ore is also not particularly limited, according to a particular embodiment of the invention, zinc roasted ore can be the calcium oxide of the sulphur of the iron of the copper of the lead of the cadmium of the zinc containing 45 ~ 55wt%, 0.1 ~ 0.5wt%, 1 ~ 3wt%, 0.2 ~ 1.0wt%, 8 ~ 20wt%, 0.1 ~ 2.5wt%, 0.5 ~ 1.0wt%, the magnesium oxide of 0.5 ~ 1.0wt%, the silicon-dioxide of 1.0 ~ 5.0wt% and a small amount of arsenic, silver, fluorine, chlorine, indium, germanium, cobalt and nickel etc.
According to embodiments of the invention, the particular type of oxygenant is also not particularly limited, and according to a particular embodiment of the invention, oxygenant can for being selected from least one in manganese mineral powder, potassium permanganate, air and oxygen.According to embodiments of the invention, the particular type of electrolytic solution is also not particularly limited, and according to a particular embodiment of the invention, electrolytic solution can be zinc electrolytic waste liquid.According to a particular embodiment of the invention, Zn in zinc electrolytic waste liquid
2+concentration can be 45-55g/L, H
2sO
4concentration can be 160-180g/L.According to embodiments of the invention, the condition of meutral innersion process is also not particularly limited, according to a particular embodiment of the invention, meutral innersion process can be carried out completing for 1.5 ~ 2.5 hours under the terminal acidity of 4.8 ~ 5.2 with pH at the temperature of 50 ~ 70 degrees Celsius.In this step, particularly, first under the effect of oxygenant, make zinc, copper, cadmium etc. be oxidized into oxide compound, then under the effect of electrolytic solution, mainly carry out following chemical reaction:
ZnO+H
2SO
4=ZnSO
4+H
2O
CuO+H
2SO
4=CuSO
4+H
2O
CdO+H
2SO
4=CdSO
4+H
2O
S200: the first dense process
According to embodiments of the invention, the first dense process is carried out to obtained meutral innersion liquid, thus the first supernatant liquor and the first end liquid can be obtained respectively.According to embodiments of the invention, the first supernatant liquor main component: Zn
2+concentration can be 140 ~ 160g/L, Fe
alwaysthe concentration of ion can lower than 30mg/L, Cu
2+concentration can be 200 ~ 1000mg/L, Cd
2+concentration can be 200 ~ 600mg/L, the first end liquid main component: the content of zinc element can be 18 ~ 22wt%, the content of ferro element can be 10 ~ 15wt%.In this step, particularly, meutral innersion liquid is added in thickener, after adding polyacrylamide flocculant, carry out solid-liquor separation through natural subsidence process simultaneously.
S300: neutralizing treatment
According to embodiments of the invention, the first obtained end liquid is carried out neutralizing treatment, thus the solution through neutralizing treatment can be obtained.According to embodiments of the invention, the condition of neutralizing treatment is also not particularly limited, according to a particular embodiment of the invention, neutralizing treatment can at the temperature of 60 ~ 75 degrees Celsius and pH carry out completing for 1.5 ~ 2.5 hours under the terminal acidity of 1.5 ~ 2.5.In this step, concrete, contain a large amount of zinc in the first end liquid obtained by neutralizing treatment, most of zinc can be made to be dissolved in solution, thus the zinc concentration in solution can be improved, for follow-up spray deironing is prepared.
S400: the second dense process
According to embodiments of the invention, the obtained solution through neutralizing treatment is carried out the second dense process, thus the second supernatant liquor and the second end liquid can be obtained respectively.According to embodiments of the invention, the second supernatant liquor main component: Zn
2+concentration can be 100 ~ 140g/L, Fe
alwaysionic concn can be 5 ~ 35g/L, and the content of the second end liquid main component Zn element is the content of 15 ~ 25wt%, Fe element is 15 ~ 25wt%.
S500: high acidic oils process
According to embodiments of the invention, the second obtained end liquid is carried out high acidic oils process, thus the solution through high acidic oils process can be obtained.According to embodiments of the invention, the condition of high acidic oils process is also not particularly limited, according to a particular embodiment of the invention, high acidic oils process can at the temperature of 85 ~ 95 degrees Celsius and terminal acidity be carry out at least 2 hours under 40 ~ 70g/L condition.The main chemical reactions occurred is:
ZnFe
2O
4+4H
2SO
4=Fe
2（SO
4）
3+ZnSO
4+4H
2O
ZnO+H
2SO
4=ZnSO
4+H
2O
S600: the three dense process
According to embodiments of the invention, the solution through high acidic oils process obtained is carried out the 3rd dense process, to obtain the 3rd supernatant liquor and the 3rd end liquid respectively.According to embodiments of the invention, the 3rd supernatant liquor main component: Zn
2+concentration can be 100 ~ 120g/L, Fe
alwaysthe concentration of ion can be 15 ~ 30g/L, H
2sO
4concentration can be 40 ~ 70g/L; 3rd end liquid main component: the content of zinc element can be 5 ~ 12wt%, the content of ferro element can be 5 ~ 15wt%.With reference to figure 2, according to embodiments of the invention, the 3rd supernatant liquor can be returned and carry out neutralizing treatment.Thus, the acid in zinc oxide neutralization the 3rd supernatant liquor in the first end liquid can be utilized, thus liquid before qualified deironing can be provided.
S700: super acid leaches process
According to embodiments of the invention, the 3rd obtained end liquid is carried out super acid and leach process, thus the solution leaching process through super acid can be obtained.According to embodiments of the invention, super acid-treated condition is also not particularly limited, according to a particular embodiment of the invention, super acid leach process can at the temperature of 85 ~ 95 degrees Celsius and terminal acidity be carry out at least 2 hours under 100 ~ 120g/L condition.In this step, concrete, in the 3rd end liquid, add the vitriol oil and zinc electrolytic waste liquid, adopt high temperature peracid Strengthen education to be difficult to the zinc ferrite leached, the leaching yield of zinc can be improved thus further.The main chemical reactions occurred is: ZnFe
2o
4+ 4H
2sO
4=Fe
2(SO
4)
3+ ZnSO
4+ 4H
2o.
S800: the four dense process
According to embodiments of the invention, the 4th dense process is carried out, to obtain the 4th supernatant liquor and the 4th end liquid respectively to the obtained solution through super acid leaching process.According to embodiments of the invention, the 4th supernatant liquor main component: Zn
2+concentration can be 100 ~ 120g/L, Fe
alwaysthe concentration of ion can be 10 ~ 35g/L, H
2sO
4concentration can be 100 ~ 120g/L, the 4th end liquid main component: the content of zinc element can be 4 ~ 10wt%, and the content of ferro element can be 5 ~ 15wt%, and the content of lead element can be 10 ~ 20wt%.
S900: the first washing and filtering
According to embodiments of the invention, the first washing and filtering is carried out to the 4th obtained end liquid, thus lead smelting gas and the first filtrate can be obtained respectively.With reference to figure 2, according to embodiments of the invention, can by the first obtained filtrate and and the 4th supernatant liquor return and carry out high acidic oils process, the leaching yield of zinc can be improved thus.
S1000: spray deironing process
According to embodiments of the invention, utilize zinc roasted ore and/or zinc oxide fumes to carry out spray deironing process to the second supernatant liquor that S400 obtains, thus iron ore slurry can be obtained.According to embodiments of the invention, spray the condition of deironing process and be not particularly limited, according to a particular embodiment of the invention, spray deironing process can be carried out under the terminal acidity of 3.0 ~ 4.5 with pH at the temperature of 80 ~ 90 degrees Celsius.The main chemical reactions occurred is:
Fe
2（SO
4）
3+H
2O+3ZnO=2FeO.OH↓+3ZnSO
4
S1100: stage treatment
According to embodiments of the invention, stage treatment is carried out to obtained iron ore slurry, thus coarse sand and mixing solutions can be obtained respectively.With reference to figure 2, according to embodiments of the invention, obtained coarse sand can be returned and carry out neutralizing treatment, to provide liquid before qualified deironing.In this step, concrete, obtained iron ore slurry is carried out cyclone classification or screw classifying, and fine particle (scum) is separated with coarse particles (unreacted is calcining completely), and the fine particle separated carries out dense process, and coarse particles returns neutralizing treatment.
S1200: the five dense process
According to embodiments of the invention, the 5th dense process is carried out to above obtained mixing solutions, thus the 5th supernatant liquor and the 5th end liquid can be obtained respectively.According to embodiments of the invention, the 5th supernatant liquor main component: Zn
2+concentration can be 100 ~ 140g/L, Fe
alwaysthe concentration of ion can be 1 ~ 4g/L, the 5th end liquid main component: the content of zinc element can be 5.0 ~ 12.0wt%, and the content of ferro element can be 25 ~ 35wt%.
S1300: the second washing and filtering
According to embodiments of the invention, the second washing and filtering is carried out to above the 5th obtained end liquid, thus scum and the second filtrate can be obtained.With reference to figure 2, according to embodiments of the invention, the 5th obtained supernatant liquor and the second filtrate returning can be carried out meutral innersion process.
Method according to the process zinc roasted ore of the embodiment of the present invention can significantly improve scum slag rate by employing super acid leaching treatment process with using zinc roasted ore or oxygenant flue dust as the neutralizing agent of spray deironing treating processes, and significantly reduce lead smelting gas slag rate, in gained lead smelting gas, plumbous silver is of high grade, simultaneously, the process employs zinc hydrometallurgy hot acid leaching-Spraying Precipitator in Iron Removal, adhere to that liquid walks short circuit, material walk long distances, 2 are fed in raw material, the feature of 3 acid addings, comprehensive recovery of lead, silver, copper, cadmium, cobalt, indium, the valuable metals such as bismuth, effectively improve the recovery utilization rate of valuable metal, in addition, the method is simple compared with other procedure, by means of only regulate neutralizing agent (roasted ore) and iron-containing liquor add speed, need not reduction process and add other additive, scum can be realized be separated with the effective of lead smelting gas, the scum obtained can be delivered to the plumbous plumbous warm sludge of smelting of fuming furnace collocation of smelting and process together, the higher-grade lead smelting gas obtained send plumbous reduction furnace for smelting direct production lead bullion, achieve plumbous zinc complementary, wet fire is compatible, the technique object of energy-saving and emission-reduction, new way is opened for reducing zinc hydrometallurgy production cost, achieve smelting waste slag innoxious, the object of resource utilization, facilitate the lifting of Business Economic Benefit.
With reference to figure 3, according to embodiments of the invention, the method for process zinc roasted ore comprises further:
S1400: purifying treatment
According to embodiments of the invention, the first obtained supernatant liquor is carried out purifying treatment.In this step, particularly, purifying treatment is in fact by adding zinc dust precipitation copper removal, cadmium, or adds Zinc dust Cementation for Cobalt Removal, nickel when other additive (as antimonic salt) exists.Thus, the Cu in the first supernatant liquor can be made by purifying treatment
2+, Cd
2+, Co
2+, Ni
2+deng impurity except within the permission content range to Zinc electrolysis process, guarantee normally carrying out and producing the zinc metal sheet of better quality of electrolytic deposition process, simultaneously, by the inrichment of scavenging process, make there is valency associated element in raw material, as Cu, Cd, Co etc. obtain enrichment, and byproduct copper ore concentrates, Spongy Cadmium and cobalt concentrate can be obtained through process.Its main main chemical reactions equation is as follows:
CuSO
4+Zn=Cu↓+ZnSO
4
CdSO
4+Zn=Cd↓+ZnSO
4
CoSO
4+Zn=Co↓+ZnSO
4
NiSO
4+Zn=Ni↓+ZnSO
4
As mentioned above, can have according to the method for the process zinc roasted ore of the embodiment of the present invention and be selected from following advantage one of at least:
Adhere to that liquid walks short circuit, material walk long distances according to the method for the process zinc roasted ore of the embodiment of the present invention, the feature of 2 reinforced, 3 acid addings, the valuable metals such as comprehensive recovery of lead, silver, copper, cadmium, cobalt, indium, bismuth, effectively improve the recovery utilization rate of valuable metal;
Control simple according to the operation of the method for the process zinc roasted ore of the embodiment of the present invention, what only need control neutralizing agent (roasted ore or zinc oxide fumes) and iron-containing liquor adds speed, temperature, pH value;
According to the method for the process zinc roasted ore of the embodiment of the present invention without the need to adding Na
+, NH
4 +the additives such as salt;
Adopt low iron to sink iron according to the method for the process zinc roasted ore of the embodiment of the present invention, make Fe
3+solution is entered with injection mode;
According to the method for the process zinc roasted ore of the embodiment of the present invention without the need to reducing operation, lower concentration ferric iron directly generates goethite precipitation;
Low according to the dust rate of the method scum pyrogenic attack output of the process zinc roasted ore of the embodiment of the present invention, flue dust quality is good;
Strong according to method removing impurities (F, Cl, As, Sb, the Si etc.) ability of the process zinc roasted ore of the embodiment of the present invention;
Simple according to the method equipment configuration of the process zinc roasted ore of the embodiment of the present invention, without the need to high pressure or specific installation;
Of high grade according to the plumbous silver of the super acid leached mud (lead smelting gas) in the method for the process zinc roasted ore of the embodiment of the present invention, plumbous as byproduct direct Song Qian smeltery refining.
Conveniently understand, below with reference to Fig. 4-6, the system of the process zinc roasted ore of the method for the process zinc roasted ore of the enforcement embodiment of the present invention is described in detail.According to embodiments of the invention, this system comprises:
Meutral innersion device 100: according to embodiments of the invention, meutral innersion device 100 for being mixed with oxygenant and electrolytic solution by zinc roasted ore and carrying out meutral innersion process, thus can obtain meutral innersion liquid.According to embodiments of the invention, the composition of zinc roasted ore is also not particularly limited, according to a particular embodiment of the invention, zinc roasted ore can be the calcium oxide of the sulphur of the iron of the copper of the lead of the cadmium of the zinc containing 45 ~ 55wt%, 0.1 ~ 0.5wt%, 1 ~ 3wt%, 0.2 ~ 1.0wt%, 8 ~ 20wt%, 0.1 ~ 2.5wt%, 0.5 ~ 1.0wt%, the magnesium oxide of 0.5 ~ 1.0wt%, the silicon-dioxide of 1.0 ~ 5.0wt% and a small amount of arsenic, silver, fluorine, chlorine, indium, germanium, cobalt and nickel etc.
According to embodiments of the invention, the particular type of oxygenant is also not particularly limited, and according to a particular embodiment of the invention, oxygenant can for being selected from least one in manganese mineral powder, potassium permanganate, air and oxygen.According to embodiments of the invention, the particular type of electrolytic solution is also not particularly limited, and according to a particular embodiment of the invention, electrolytic solution can be zinc electrolytic waste liquid.According to a particular embodiment of the invention, Zn in zinc electrolytic waste liquid
2+concentration can be 45-55g/L, H
2sO
4concentration can be 160-180g/L.According to embodiments of the invention, the condition of meutral innersion process is also not particularly limited, according to a particular embodiment of the invention, meutral innersion process can be carried out completing for 1.5 ~ 2.5 hours under the terminal acidity of 4.8 ~ 5.2 with pH at the temperature of 50 ~ 70 degrees Celsius.In this step, particularly, first under the effect of oxygenant, make zinc, copper, cadmium etc. be oxidized into oxide compound, then under the effect of electrolytic solution, mainly carry out following chemical reaction:
ZnO+H
2SO
4=ZnSO
4+H
2O
CuO+H
2SO
4=CuSO
4+H
2O
CdO+H
2SO
4=CdSO
4+H
2O
First dense device 200: according to embodiments of the invention, the first dense device 200 is connected with meutral innersion device 100, for carrying out the first dense process to the meutral innersion liquid obtained, thus can obtain the first supernatant liquor and the first end liquid respectively.According to embodiments of the invention, the first supernatant liquor main component: Zn
2+concentration can be 140 ~ 160g/L, Fe
alwaysthe concentration of ion can lower than 30mg/L, Cu
2+concentration can be 200 ~ 1000mg/L, Cd
2+concentration can be 200 ~ 600mg/L, the first end liquid main component: the content of zinc element can be 18 ~ 22wt%, the content of ferro element can be 10 ~ 15wt%.In this step, particularly, meutral innersion liquid is added in thickener, after adding polyacrylamide flocculant, carry out solid-liquor separation through natural subsidence process simultaneously.
Neutralizing treatment device 300: according to embodiments of the invention, neutralizing treatment device 300 is connected with the first dense device 200, for carrying out neutralizing treatment to the first end liquid obtained, thus can obtain the solution through neutralizing treatment.According to embodiments of the invention, the condition of neutralizing treatment is also not particularly limited, according to a particular embodiment of the invention, neutralizing treatment can at the temperature of 60 ~ 75 degrees Celsius and pH carry out completing for 1.5 ~ 2.5 hours under the terminal acidity of 1.5 ~ 2.5.In this step, concrete, contain a large amount of zinc in the first end liquid obtained by neutralizing treatment, most of zinc can be made to be dissolved in solution, thus the zinc concentration in solution can be improved, for follow-up spray deironing is prepared.
Second dense device 400: according to embodiments of the invention, the second dense device 400 is connected with neutralizing treatment device 300, for carrying out the second dense process to the solution through neutralizing treatment obtained, thus can obtain the second supernatant liquor and the second end liquid respectively.According to embodiments of the invention, the second supernatant liquor main component: Zn
2+concentration can be 100 ~ 140g/L, Fe
alwaysionic concn can be 5 ~ 35g/L, and the content of the second end liquid main component Zn element is the content of 15 ~ 25wt%, Fe element is 15 ~ 25wt%.
High acidic oils device 500: according to embodiments of the invention, high acidic oils device 500 is connected with the second dense device 400, for carrying out high acidic oils process to the second end liquid obtained, thus can obtain the solution through high acidic oils process.According to embodiments of the invention, the condition of high acidic oils process is also not particularly limited, according to a particular embodiment of the invention, high acidic oils process can at the temperature of 85 ~ 95 degrees Celsius and terminal acidity be carry out at least 2 hours under 40 ~ 70g/L condition.The main chemical reactions occurred is:
ZnFe
2O
4+4H
2SO
4=Fe
2（SO
4）
3+ZnSO
4+4H
2O
ZnO+H
2SO
4=ZnSO
4+H
2O
3rd dense device 600: according to embodiments of the invention, 3rd dense device 600 is connected with high acidic oils device 500, for carrying out the 3rd dense process to the solution through high acidic oils process obtained, thus the 3rd supernatant liquor and the 3rd end liquid can be obtained respectively.According to embodiments of the invention, the 3rd supernatant liquor main component: Zn
2+concentration can be 100 ~ 120g/L, Fe
alwaysthe concentration of ion can be 15 ~ 30g/L, H
2sO
4concentration can be 40 ~ 70g/L; 3rd end liquid main component: the content of zinc element can be 5 ~ 12wt%, the content of ferro element can be 5 ~ 15wt%.With reference to figure 2, according to embodiments of the invention, the 3rd supernatant liquor can be returned and carry out neutralizing treatment.Thus, the acid in zinc oxide neutralization the 3rd supernatant liquor in the first end liquid can be utilized, thus liquid before qualified deironing can be provided.
Super acid leaching device 700: according to embodiments of the invention, super acid leaching device 700 is connected with the 3rd dense device 600, leaches process, thus can obtain the solution leaching process through super acid for carrying out super acid to described 3rd end liquid obtained.According to embodiments of the invention, super acid-treated condition is also not particularly limited, according to a particular embodiment of the invention, super acid leach process can at the temperature of 85 ~ 95 degrees Celsius and terminal acidity be carry out at least 2 hours under 100 ~ 120g/L condition.In this step, concrete, in the 3rd end liquid, add the vitriol oil and zinc electrolytic waste liquid, adopt high temperature peracid Strengthen education to be difficult to the zinc ferrite leached, the leaching yield of zinc can be improved thus further.The main chemical reactions occurred is: ZnFe
2o
4+ 4H
2sO
4=Fe
2(SO
4)
3+ ZnSO
4+ 4H
2o.
4th dense device 800: according to embodiments of the invention, 4th dense device 800 is connected with super acid leaching device 700, carry out the 4th dense process for the obtained solution through super acid leaching process, thus the 4th supernatant liquor and the 4th end liquid can be obtained respectively.According to embodiments of the invention, the 4th supernatant liquor main component: Zn
2+concentration can be 100 ~ 120g/L, Fe
alwaysthe concentration of ion can be 10 ~ 35g/L, H
2sO
4concentration can be 100 ~ 120g/L, the 4th end liquid main component: the content of zinc element can be 4 ~ 10wt%, and the content of ferro element can be 5 ~ 15wt%, and the content of lead element can be 10 ~ 20wt%.
First washing and filtering device 900: according to embodiments of the invention, the first washing and filtering device 900 is connected with the 4th dense device 800, for carrying out the first washing and filtering to described 4th end liquid obtained, thus can obtain lead smelting gas and the first filtrate respectively.
Spray deironing apparatus 1000: according to embodiments of the invention, spray Chen Tie device 1000 is connected with the second dense device 400, be suitable for utilizing zinc roasted ore and/or zinc oxide fumes to carry out spray deironing process to by described second supernatant liquor, thus iron ore slurry can be obtained.According to embodiments of the invention, spray the condition of deironing process and be not particularly limited, according to a particular embodiment of the invention, spray deironing process can be carried out under the terminal acidity of 3.0 ~ 4.5 with pH at the temperature of 80 ~ 90 degrees Celsius.The main chemical reactions occurred is:
Fe
2（SO
4）
3+H
2O+3ZnO=2FeO.OH↓+3ZnSO
4
Sorting equipment 1100: according to embodiments of the invention, sorting equipment 1100 is connected with spray deironing apparatus 1000, for carrying out stage treatment to iron ore slurry, thus can obtain coarse sand and mixing solutions respectively.In this step, concrete, obtained iron ore slurry is carried out cyclone classification or screw classifying, and fine particle (scum) is separated with coarse particles (unreacted is calcining completely), and the fine particle separated carries out dense process, and coarse particles returns neutralizing treatment.
5th dense device 1200: according to embodiments of the invention, the 5th dense device 1200 is connected with sorting equipment 1100, for carrying out the 5th dense process to mixing solutions, thus can obtain the 5th supernatant liquor and the 5th end liquid respectively.According to embodiments of the invention, the 5th supernatant liquor main component: Zn
2+concentration can be 100 ~ 140g/L, Fe
alwaysthe concentration of ion can be 1 ~ 4g/L, the 5th end liquid main component: the content of zinc element can be 5.0 ~ 12.0wt%, and the content of ferro element can be 25 ~ 35wt%.
Second washing and filtering device 1300: according to embodiments of the invention, the second washing and filtering device 1300 is connected with the 5th dense device 1200, for the 5th end liquid is carried out the second washing and filtering, thus can obtain scum and the second filtrate.
The system implementing the process zinc roasted ore of the method for the process zinc roasted ore of the embodiment of the present invention effectively can implement the method for above-mentioned process zinc roasted ore.
With reference to figure 5, according to embodiments of the invention, the system of process zinc roasted ore comprises further:
Refining plant 1400: according to embodiments of the invention, refining plant 1400 is connected with the first dense device 200, for carrying out purifying treatment to the first supernatant liquor.In this step, particularly, purifying treatment is in fact by adding zinc dust precipitation copper removal, cadmium, or adds Zinc dust Cementation for Cobalt Removal, nickel when other additive (as antimonic salt) exists.Thus, the Cu in the first supernatant liquor can be made by purifying treatment
2+, Cd
2+, Co
2+, Ni
2+deng impurity except within the permission content range to Zinc electrolysis process, guarantee normally carrying out and producing the zinc metal sheet of better quality of electrolytic deposition process, simultaneously, by the inrichment of scavenging process, make there is valency associated element in raw material, as Cu, Cd, Co etc. obtain enrichment, and byproduct copper ore concentrates, Spongy Cadmium and cobalt concentrate can be obtained through process.Its main main chemical reactions equation is as follows:
CuSO
4+Zn=Cu↓+ZnSO
4
CdSO
4+Zn=Cd↓+ZnSO
4
CoSO
4+Zn=Co↓+ZnSO
4
NiSO
4+Zn=Ni↓+ZnSO
4
With reference to figure 6, according to embodiments of the invention, according to the embodiment of the present invention, the 3rd dense device 600 is connected with neutralizing treatment device 300 respectively with sorting equipment 100, carries out neutralizing treatment for returning the 3rd supernatant liquor and coarse sand.Thus, thus, the acid in zinc oxide neutralization the 3rd supernatant liquor in the first end liquid can be utilized, thus liquid before qualified deironing can be provided.
According to embodiments of the invention, the 4th dense device 800 is connected with high acidic oils device 500 respectively with the first washing device 900, for carrying out high acidic oils process to the 4th supernatant liquor and the first filtrate returning.Thus, the leaching yield of zinc can be significantly improved.
According to embodiments of the invention, the 5th dense device 1200 is connected with meutral innersion device 100 respectively with the second washing and filtering device 1300, for carrying out meutral innersion process to the 5th supernatant liquor and the second filtrate returning.Thus, the recovery utilization rate of valuable metal can be improved further.
Below with reference to specific embodiment, present invention is described, it should be noted that, these embodiments are only descriptive, and do not limit the present invention in any way.
Embodiment 1
Zinc roasting mineral phase composite table 1:
Table 1
| Composition | Zn | Cd | Pb | Cu | Fe | S | S SO4 | CaO | MgO | SiO 2 |
| Amount to/% | 52.38 | 0.22 | 1.71 | 0.57 | 15.6 | 0.4 | 1.31 | 0.91 | 0.68 | 3.42 |
| Composition | As | Ag | F | Cl | In | Ge | Co | Ni | ||
| Amount to/g/t | 7970 | 194 | 23.9 | 51.2 | 228 | 4.55 | 433 | 399 |
Get the 100kg zinc roasted ore of said components, it is processed, specifically comprises the following steps:
At the temperature of 65 degrees Celsius, carry out meutral innersion process 2 hours with pH under the terminal acidity of 5.2 after being mixed with oxygenant and electrolytic solution by roasted ore, thus meutral innersion liquid can be obtained; First dense process is carried out to obtained meutral innersion liquid, thus the first supernatant liquor and the first end liquid can be obtained respectively; Under the terminal acidity being 2.0 with pH at the temperature of 70 degrees Celsius, the first obtained end liquid is carried out neutralizing treatment 2 hours, thus the solution through neutralizing treatment can be obtained; The obtained solution through neutralizing treatment is carried out the second dense process, thus the second supernatant liquor and the second end liquid can be obtained respectively; At the temperature of 95 degrees Celsius and terminal acidity for the second obtained end liquid being carried out high acidic oils process 2 hours under 60g/L condition, thus the solution through high acidic oils process can be obtained; The solution through high acidic oils process obtained is carried out the 3rd dense process, to obtain the 3rd supernatant liquor and the 3rd end liquid respectively; At the temperature of 95 degrees Celsius and terminal acidity be under 100g/L condition, the 3rd obtained end liquid is carried out super acid and leaches process 2 hours, thus the solution leaching process through super acid can be obtained; 4th dense process is carried out, to obtain the 4th supernatant liquor and the 4th end liquid respectively to the obtained solution through super acid leaching process; First washing and filtering is carried out to the 4th obtained end liquid, thus lead smelting gas and the first filtrate can be obtained respectively, and by the first obtained filtrate and and the 4th supernatant liquor return and carry out high acidic oils process; At the temperature of 90 degrees Celsius and pH be under the terminal acidity of 4.0, utilize zinc roasted ore to carry out spray deironing process to the second supernatant liquor obtained, thus can obtain iron ore starch; Stage treatment is carried out to obtained iron ore slurry, thus coarse sand and mixing solutions can be obtained respectively.And obtained coarse sand and the 3rd supernatant liquor are returned carry out neutralizing treatment; 5th dense process is carried out to above obtained mixing solutions, thus the 5th supernatant liquor and the 5th end liquid can be obtained respectively; Second washing and filtering is carried out to above the 5th obtained end liquid, thus scum and the second filtrate can be obtained, and the 5th obtained supernatant liquor and the second filtrate returning are carried out meutral innersion process.
By the composition of the first supernatant liquor, scum and lead smelting gas that obtains after aforesaid method process in Table 2-4:
First supernatant liquor composition is as following table 2:
Table 2
| Element | Zn | Cu | Cd | Co | Ni |
| Composition g/L | 130～140 | 0.47 | 0.28 | 0.04 | 0.037 |
Scum slag rate 46%, main component is as following table 3:
Table 3
| Composition | Zn | Pb | Cu | Fe | S is total | CaO | MgO | SiO 2 | Ag | In |
| Amount to/% | 10 | 1.34 | 0.29 | 30 | 2.57 | 0.72 | 0.16 | 3.35 | 0.0152 | 0.044 |
Lead smelting gas slag rate 12%, main component is as following table 4:
Table 4
| Composition | Zn | Pb | Cu | Fe | S is total | CaO | MgO | SiO 2 | Ag | In |
| Amount to/% | 5.0 | 11.4 | 0.76 | 12 | 15.0 | 5.77 | 0.68 | 19.47 | 0.1265 | 0.015 |
Embodiment 2
Get the 100kg zinc roasted ore of said components, it is processed, specifically comprises the following steps:
At the temperature of 70 degrees Celsius, carry out meutral innersion process 2.5 hours with pH under the terminal acidity of 5.0 after being mixed with oxygenant and electrolytic solution by roasted ore, thus meutral innersion liquid can be obtained; First dense process is carried out to obtained meutral innersion liquid, thus the first supernatant liquor and the first end liquid can be obtained respectively; Under the terminal acidity being 1.5 with pH at the temperature of 65 degrees Celsius, the first obtained end liquid is carried out neutralizing treatment 2 hours, thus the solution through neutralizing treatment can be obtained; The obtained solution through neutralizing treatment is carried out the second dense process, thus the second supernatant liquor and the second end liquid can be obtained respectively; At the temperature of 95 degrees Celsius and terminal acidity for the second obtained end liquid being carried out high acidic oils process 4 hours under 55g/L condition, thus the solution through high acidic oils process can be obtained; The solution through high acidic oils process obtained is carried out the 3rd dense process, to obtain the 3rd supernatant liquor and the 3rd end liquid respectively; At the temperature of 95 degrees Celsius and terminal acidity be under 120g/L condition, the 3rd obtained end liquid is carried out super acid and leaches process 4 hours, thus the solution leaching process through super acid can be obtained; 4th dense process is carried out, to obtain the 4th supernatant liquor and the 4th end liquid respectively to the obtained solution through super acid leaching process; First washing and filtering is carried out to the 4th obtained end liquid, thus lead smelting gas and the first filtrate can be obtained respectively, and by the first obtained filtrate and and the 4th supernatant liquor return and carry out high acidic oils process; At the temperature of 90 degrees Celsius and pH be under the terminal acidity of 3.8, utilize zinc oxide fumes to carry out spray deironing process to the second supernatant liquor obtained, thus can obtain iron ore starch; Stage treatment is carried out to obtained iron ore slurry, thus coarse sand and mixing solutions can be obtained respectively.And obtained coarse sand and the 3rd supernatant liquor are returned carry out neutralizing treatment; 5th dense process is carried out to above obtained mixing solutions, thus the 5th supernatant liquor and the 5th end liquid can be obtained respectively; Second washing and filtering is carried out to above the 5th obtained end liquid, thus scum and the second filtrate can be obtained, and the 5th obtained supernatant liquor and the second filtrate returning are carried out meutral innersion process.
By the composition of the first supernatant liquor, scum and lead smelting gas that obtains after aforesaid method process in Table 5-7:
First supernatant liquor composition is as following table 5:
Table 5
| Element | Zn | Cu | Cd | Co | Ni |
| Composition g/L | 130～140 | 0.5 | 0.3 | 0.05 | 0.04 |
Scum slag rate 44%, main component is as following table 6:
Table 6
| Composition | Zn | Pb | Cu | Fe | S is total | CaO | MgO | SiO 2 | Ag | In |
| Amount to/% | 8 | 1.5 | 0.2 | 32 | 2.6 | 0.76 | 0.17 | 3.58 | 0.018 | 0.05 |
Lead smelting gas slag rate 10%, main component is as following table 7:
Table 7
| Composition | Zn | Pb | Cu | Fe | S is total | CaO | MgO | SiO 2 | Ag | In |
| Amount to/% | 4.5 | 15 | 0.76 | 10 | 15.2 | 5.77 | 0.68 | 19.48 | 0.15 | 0.015 |
Comparative example
Get the 100kg zinc roasted ore of said components, it is processed, specifically comprises the following steps:
At the temperature of 65 degrees Celsius, carry out meutral innersion process 2 hours with pH under the terminal acidity of 5.2 after being mixed with oxygenant and electrolytic solution by roasted ore, thus meutral innersion liquid can be obtained; First dense process is carried out to obtained meutral innersion liquid, thus the first supernatant liquor and the first end liquid can be obtained respectively; Under the terminal acidity being 2.0 with pH at the temperature of 70 degrees Celsius, the first obtained end liquid is carried out neutralizing treatment 2 hours, thus the solution through neutralizing treatment can be obtained; The obtained solution through neutralizing treatment is carried out the second dense process, thus the second supernatant liquor and the second end liquid can be obtained respectively; At the temperature of 90 degrees Celsius and terminal acidity for the second obtained end liquid being carried out high acidic oils process 2 hours under 50g/L condition, thus the solution through high acidic oils process can be obtained; The solution through high acidic oils process obtained is carried out the 3rd dense process, to obtain the 3rd supernatant liquor and the 3rd end liquid respectively; First washing and filtering is carried out to the 3rd end liquid, thus lead smelting gas and the first filtrate can be obtained respectively, and by the first obtained filtrate and and the 3rd supernatant liquor return and carry out high acidic oils process; At the temperature of 90 degrees Celsius and terminal acidity be under the condition of 3.5, utilize bicarbonate of ammonia and sodium bicarbonate to carry out spray deironing process to the second supernatant liquor obtained, thus can obtain iron ore starch; Stage treatment is carried out to obtained iron ore slurry, thus coarse sand and mixing solutions can be obtained respectively; And obtained coarse sand and the second supernatant liquor are returned carry out neutralizing treatment; 4th dense process is carried out to above obtained mixing solutions, thus the 4th supernatant liquor and the 4th end liquid can be obtained respectively; Second washing and filtering is carried out to above the 4th obtained end liquid, thus scum and the second filtrate can be obtained, and the 4th obtained supernatant liquor and the second filtrate returning are carried out meutral innersion process.
By the composition of the first supernatant liquor, scum and lead smelting gas that obtains after aforesaid method process in Table 8-10:
First supernatant liquor composition is as following table 8:
Table 8
| Element | Zn | Cu | Cd | Co | Ni |
| Composition g/L | 130～140 | 0.4 | 0.2 | 0.02 | 0.02 |
Scum slag rate: 28%, main component is as following table 9:
Table 9
| Composition | Zn | Pb | Cu | Fe | S is total | CaO | MgO | SiO 2 | Ag | In |
| Amount to/% | 4.2 | 0.15 | 0.16 | 26 | 11.85 | 0.6 | 0.2 | 3.2 | 0.004 | 0.015 |
Lead smelting gas slag rate: 26%, main component is as following table 10:
Table 10
| Composition | Zn | Pb | Cu | Fe | S is total | CaO | MgO | SiO 2 | Ag | In |
| Amount to/% | 5.8 | 3.4 | 0.2 | 20 | 10.6 | 1.35 | 0.8 | 7.9 | 0.02 | 0.014 |
As can be seen here, comparatively comparative example is high for the scum rate in embodiment 1-2, and lead smelting gas rate comparatively comparative example is low, simultaneously without the need to adding N
a +, NH
4 +the heavy chalybeate such as salt, and plumbous silver is of high grade in lead smelting gas, can the valuable metal such as comprehensive recovery of lead, silver, copper, cadmium, cobalt, indium, bismuth, effective raising valuable metal recovery utilization ratio, the higher-grade lead smelting gas obtained send plumbous reduction furnace for smelting direct production lead bullion, achieving the technique object of complementary, the wet fire compatibility of plumbous zinc, energy-saving and emission-reduction, opening new way for reducing zinc hydrometallurgy production cost, achieve that smelting waste slag is innoxious, the object of resource utilization, facilitate the lifting of Business Economic Benefit.
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. process a method for zinc roasted ore, it is characterized in that, comprising:
(1) zinc roasted ore mixed with oxygenant and electrolytic solution and carry out meutral innersion process, and the first dense process is carried out to the meutral innersion liquid obtained, to obtain the first supernatant liquor and the first end liquid respectively;
(2) described first end liquid step (1) obtained carries out neutralizing treatment, and carries out the second dense process to the solution through neutralizing treatment obtained, to obtain the second supernatant liquor and the second end liquid respectively;
(3) described second end liquid step (2) obtained carries out high acidic oils process, and carries out the 3rd dense process to the solution through high acidic oils process obtained, to obtain the 3rd supernatant liquor and the 3rd end liquid respectively;
(4) described 3rd end liquid step (3) obtained carries out super acid and leaches process, and carries out the 4th dense process, to obtain the 4th supernatant liquor and the 4th end liquid respectively to the solution through super acid leaching process obtained;
(5) described 4th end liquid step (4) obtained carries out the first washing and filtering, to obtain lead smelting gas and the first filtrate respectively;
(6) zinc roasted ore and/or zinc oxide fumes is utilized to carry out spray deironing process to the second supernatant liquor that step (2) obtains, to obtain iron ore slurry;
(7) described iron ore slurry step (6) obtained carries out stage treatment, to obtain coarse sand and mixing solutions respectively, and carries out the 5th dense process to described mixing solutions, to obtain the 5th supernatant liquor and the 5th end liquid respectively; And
(8) described 5th end liquid step (7) obtained carries out the second washing and filtering, to obtain scum and the second filtrate respectively,
Wherein,
In step (1), described oxygenant is be selected from least one in manganese mineral powder, potassium permanganate, air and oxygen, and described electrolytic solution is zinc electrolytic waste liquid,
Described high acidic oils process is at the temperature of 85 ~ 95 degrees Celsius and terminal acidity is carry out at least 2 hours under 40 ~ 70g/L condition,
It is at the temperature of 85 ~ 95 degrees Celsius that described super acid leaches process and terminal acidity is carry out at least 2 hours under 100 ~ 120g/L condition.
2. the method for process zinc roasted ore according to claim 1, is characterized in that, comprise further:
(9) described first supernatant liquor that step (1) obtains is carried out purifying treatment;
(10) the described coarse sand that described 3rd supernatant liquor step (3) obtained and step (7) obtain returns and carries out described neutralizing treatment;
(11) described first filtrate the returning that described 4th supernatant liquor step (4) obtained and step (5) obtain carries out described high acidic oils process; And
(12) described second filtrate the returning that described 5th supernatant liquor step (7) obtained and step (8) obtain carries out described meutral innersion process.
3. the method for process zinc roasted ore according to claim 1, is characterized in that, described meutral innersion process is carried out completing for 1.5 ~ 2.5 hours under the terminal acidity of 4.8 ~ 5.2 with pH at the temperature of 50 ~ 70 degrees Celsius.
4. the method for process zinc roasted ore according to claim 1, is characterized in that, the iron concentration in described first supernatant liquor is lower than 30mg/L.
5. the method for process zinc roasted ore according to claim 1, is characterized in that, in described first end liquid, the content of ferro element is 10 ~ 15wt%.
6. the method for process zinc roasted ore according to claim 1, is characterized in that, described neutralizing treatment carries out completing for 1.5 ~ 2.5 hours under the terminal acidity of 1.5 ~ 2.5 with pH at the temperature of 60 ~ 75 degrees Celsius.
7. the method for process zinc roasted ore according to claim 1, is characterized in that, the iron concentration in described second supernatant liquor is 5 ~ 35g/L.
8. the method for process zinc roasted ore according to claim 1, is characterized in that, described spray deironing process is at the temperature of 80 ~ 90 degrees Celsius and pH carries out under the terminal acidity of 3.0 ~ 4.5.
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