CN105525097B - A kind of method and apparatus that zinc leaching residue is leached with sulfur dioxide controlling potential method - Google Patents

A kind of method and apparatus that zinc leaching residue is leached with sulfur dioxide controlling potential method Download PDF

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CN105525097B
CN105525097B CN201610039470.8A CN201610039470A CN105525097B CN 105525097 B CN105525097 B CN 105525097B CN 201610039470 A CN201610039470 A CN 201610039470A CN 105525097 B CN105525097 B CN 105525097B
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zinc
sulfur dioxide
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order
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CN105525097A (en
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邓志敢
魏昶
张帆
李兴彬
李存兄
樊刚
李旻廷
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Kunming University of Science and Technology
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Kunming University of Science and Technology
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/006—Wet processes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00—Obtaining copper
    • C22B15/0063—Hydrometallurgy
    • C22B15/0065—Leaching or slurrying
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B58/00—Obtaining gallium or indium
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The present invention relates to a kind of method and apparatus that zinc leaching residue is leached with sulfur dioxide controlling potential method, belong to technical field of wet metallurgy.This method is by zinc leaching residue and zinc concentrate mixing pulp, sulfur dioxide gas is passed through at being 90~120 DEG C in temperature, reacts 2~4h under agitation, pulp material is subjected to hot acid reducing leaching, control system and terminal 300~500mv of current potential, Fe is obtained after the completion of reaction in whole process3+Leachate less than 3g/L.The present apparatus is made up of I, II two-stage cylinder reactor, the I II two-stage cylinder reactor includes agitating device, reative cell, ring-like inlet plenum, exhaust chamber and ore pulp discharge port, reative cell of the reative cell of I order reactions room by ore pulp overfall according to the order reaction room of difference in height pipeline communication II, II grade of exhaust chamber of II order reaction room is flowed back by sulfur dioxide gas takes over the circulating line of ring-like I levels inlet plenum in connection I order reactions room.The present invention improves the leaching rate of valuable metal, simplifies technological process.

Description

A kind of method and apparatus that zinc leaching residue is leached with sulfur dioxide controlling potential method
Technical field
The present invention relates to a kind of method and apparatus that zinc leaching residue is leached with sulfur dioxide controlling potential method, belong to wet method smelting Technology for gold field.
Background technology
Zincblende is important zinc mineral resource, and in its mineralizing process, iron, indium are substituted in zincblende with isomorph Zinc atom, be difficult to make zinc, iron, indium to separate using the method for mechanical ore grinding and ore dressing, cause ore dressing output zinc concentrate contain compared with High iron is high, and is associated with the metals such as the indium of high level, copper.Iron of the association in zinc concentrate is in zinc sulfide concentrates roasting process In inevitably produce the ferrites of a large amount of zinc ferrites and other a small amount of valuable metals, zinc ferrite in neutral leaching process not It is destroyed, stayed in not dissolved zinc oxide and most iron, indium and most copper in zinc leaching residue.
In order to destroy zinc ferrite to reclaim zinc and indium, need to generally rotary kiln evaporation method or hot acid be used to leach-sink iron skill Art is handled.Wherein rotary kiln evaporation method can effectively destroy zinc ferrite, and output zinc oxide and indium oxide return to zinc metallurgy flow and returned Receive zinc indium.However, rotary kiln evaporation method high energy consumption, zinc indium recovery is low, and output low concentration sulphur dioxide flue gas is difficult to administer, Limit the popularization and application of this method.
It is a kind of effective ways for destroying zinc ferrite that hot acid, which leaches, but in the hot acid leaching process of zinc leaching residue, zinc, Iron, indium together enter in solution, and the most of presence in the form of Fe3+ of iron.With in leached mud a large amount of iron compounds it is molten Solution, a large amount of iron are entered in solution in the form of ferric ion, and the ferric ion of solution middle and high concentration will greatly improve molten The oxidation-reduction potential of liquid to more than 700mv, the zinc ferrite stability of indissoluble strengthens with the rise of current potential, it is suppressed that zinc soaks Slag tap the dissolving of middle zinc ferrite, cause metal leaching rate relatively low.
Simultaneously because the iron almost all in hot acid leachate is Fe3+, in leachate later separation deferrization process, it is The valuable metals such as heavy iron process zinc, indium, copper are avoided to enter scum, it usually needs the Fe3+ in leachate first is reduced into Fe2 +, then reclaim copper, indium with displacement method and neutralizing hydrolysis method.Currently used method is in acid condition, to utilize zinc sulfide concentrates Ferric ion in reducing leaching liquid, but because concentrate utilization rate is low, excessive addition zinc concentrate is needed, it is easily caused hot acid leachate In copper generation cuprous sulfide precipitation enter in reducing slag, and unreacted remaining zinc concentrate needs special disposal, causes this method The problems such as valuable metal leaching rate such as zinc in material, indium, copper is low, technological process is complicated, high energy consumption be present.
Therefore, how to realize the efficient leaching of zinc leaching residue, solve the problems, such as that zinc-iron separation and valuable metal efficiently utilize The key technology difficulty of zinc hydrometallurgy is turned into.
The content of the invention
For the above-mentioned problems of the prior art and deficiency, the present invention provides a kind of sulfur dioxide controlling potential method and soaked Go out the method and apparatus of zinc leaching residue.This method leaches zinc leaching residue, profit using sulfur dioxide gas and zinc concentrate collaborative SCM With ferric oxidation in the reduction of sulfide in sulfur dioxide gas and zinc sulfide concentrates and zinc leaching residue, will pass The zinc leaching residue hot acid of system leaches is merged into a process completion with leachate reducing process, synchronously realizes valuable in zinc leaching residue Metallic zinc, indium, copper efficient leaching and leachate in Fe3+It is reduced to Fe2+, the leaching rate of valuable metal is improved, is simplified Technological process, create the advantage of later separation zinc, iron, indium, copper；Simply, conveniently, the present invention passes through following skill to the present apparatus Art scheme is realized.
A kind of method that zinc leaching residue is leached with sulfur dioxide controlling potential method, by zinc leaching residue and zinc concentrate mixing slurry Change, be passed through sulfur dioxide gas at being 90~120 DEG C in temperature, react 2~4h under agitation, pulp material is subjected to heat Sour reducing leaching, control system and terminal 300~500mv of current potential, Fe is obtained after the completion of reaction in whole process3+Less than 3g/L Leachate.
It is comprised the following steps that：
（1）According to mass ratio it is 5 first by zinc leaching residue and zinc concentrate:1~10:1 is well mixed, then carries out pulp and obtains To pulp material；
（2）By step（1）Obtained pulp material is 6~10 according to liquid-solid ratio：1mL/g adds 130~180g/ of sulfur acid L zinc hydrometallurgy electrolytic liquid, temperature be 90~120 DEG C at be passed through sulfur dioxide gas, under agitation react 2~ 4h, pulp material is subjected to hot acid reducing leaching, control system and terminal 300~500mv of current potential, have reacted in whole process Into rear acquisition Fe3+Leachate less than 3g/L.
A kind of device that zinc leaching residue is leached with sulfur dioxide controlling potential method, by I, II two-stage cylinder reactor structure Into described I, II two-stage cylinder reactor includes agitating device, reative cell, ring-like inlet plenum, exhaust chamber and ore pulp discharging Mouthfuls 9, the inside of II order reaction room 16 in the I order reactions room 15 and II two-stage cylinder reactor of I two-stage cylinder reactor is Insert agitating device, I order reactions room 15 and the bottom of II order reaction room 16 are equipped with ore pulp discharge port 9, inside I order reactions room 15 from Ring-like tail gas absorption room 3, I levels exhaust chamber 19, ring-like I levels inlet plenum 17 and the ring-like ring of I levels inlet plenum 17 are sequentially provided with upper The air inlet pipe 13 that type pipeline communicates, II order reaction room 16 are sequentially provided with II grade of exhaust chamber 20, ring-like II grade of inlet plenum from top to bottom 18th, the air inlet pipe 13 communicated with ring-like II grade of inlet plenum, 18 ring-like pipeline, the top side of I order reactions room 15 are provided with exhaust port The side lower part of 2, I order reaction room 15 1 is provided with ore pulp feed socket 7 and heating steam connection 6, and the steam heated in steam connection 6 goes out The slurry liquid level lower end that mouth adds positioned at I order reactions room 15, the reative cell that I order reactions room 15 is provided with air inlet pipe 13 are overflow by ore pulp Head piece 12 is provided with the reative cell of air inlet pipe 13, II grade of row of II order reaction room 16 according to the order reaction room 16 of difference in height pipeline communication II Air chamber 20 is flowed back the circulating line of ring-like I levels inlet plenum 17 in the connection of adapter 4 I order reactions room 15 by sulfur dioxide gas, and II Another side bottom that order reaction room 16 does not connect with I order reactions room 15 is provided with sulfur dioxide gas access port 5, heating steam connection 6 and II order reaction room ore pulp overflow pipe 8.
The agitator 10 that the agitating device includes motor 1, is connected with motor 1, agitator 10 pass through stirring Sealing sleeve pipe 21 is sealed with absorption chamber or inlet plenum, and agitator 10 is sealed by sealed bearings 14 and exhaust chamber.
The end of II order reaction room ore pulp overflow pipe 8 is provided with ore pulp overfall 12.
It is above-mentioned with sulfur dioxide controlling potential method leach zinc leaching residue device application method be：
（1）By pump pulp material and zinc hydrometallurgy electrolytic liquid are passed into above-mentioned ore pulp feed socket 7, and to enter I levels anti- Answer in room 15, and be passed through steam from heating steam connection 6 and be heated to 90~120 DEG C, while from sulfur dioxide gas access port 5 Sulfur dioxide gas is passed through, and is passed into by air inlet pipe 13 in material, 1~2h of hot acid reducing leaching is controlled according to mineral slurry flux It is flowed into afterwards from ore pulp overfall 12 in II order reaction room 16；
（2）Material is entered with being passed through sulfur dioxide gas from sulfur dioxide gas access port 5 in II order reaction room 16, and The sulfur dioxide gas being passed into by air inlet pipe 13 in material continues hot acid reducing leaching, remaining two after the completion of reaction Sulfur oxide gas is entered in I order reactions room 15 by II grade of exhaust chamber 20, sulfur dioxide gas backflow adapter 4 passes through air inlet pipe 13 Reacted with new slurry, last remaining sulfur dioxide gas is by I levels exhaust chamber 19, finally by ring-like tail gas absorption The absorption lastness exhaust port 2 of room 3 is discharged, and material can pass through II order reaction room ore pulp overflow pipe 8 after the completion of Leach reaction Discharged provided with ore pulp overfall 12 end.
The beneficial effects of the invention are as follows：
（1）This method leaches zinc leaching residue using sulfur dioxide gas and zinc concentrate collaborative SCM, by Fe in leachate3+Quilt It is reduced to Fe2+, solve the problems, such as suppression of the solution potential higher in zinc leaching residue course of dissolution to zinc ferrite course of dissolution, together When promote the dissolving of zinc in material, indium, copper again, avoid copper when individually using zinc concentrate reducing leaching and precipitated with cuprous sulfide Into in leached mud and individually using caused Leaching Systems acid unbalanced problem during sulphur dioxide reduction leaching, improve Valency metal leaching rate, the leaching rate of zinc, indium, copper is realized respectively up to 98%, 96%, more than 97%；
（2）Zinc leaching residue is handled using sulfur dioxide gas, iron ion in zinc ferrite can be made to enter in the form of ferrous Into sulfuric acid solution, the acid consumption of leaching process is reduced, makes Fe in solution3+Less than 3g/L, the stable region of iron ion is increased, Avoid solution acidity change cause precipitation of iron ions caused by valuable metal loss, to realize zinc in leachate, copper, indium etc. With efficiently separating and using advantage is created for iron, technological process is simplified, energy consumption is reduced, improves the utilization of resources Rate；
（3）The present apparatus uses the continuous feeding and discharging reactor of two-stage countercurrent configuration, and waste electrolyte and zinc leaching residue are mixed Pulp is continuously pumped into I stage reactor, reacts after certain time continuous self-flowing to the IIth stage reactor, reacted ore pulp by IIth stage reactor is discharged；Sulfur dioxide gas is passed into the IIth stage reactor, the tail gas adverse current of the IIth stage reactor discharge To I stage reactor, sulfur dioxide gas is fully reacted in I stage reactor, exist in the IIth stage reactor enough Sulfur dioxide can realize the high efficiency extraction of valuable metal in zinc leaching residue, excessive zinc in I stage reactor be present and leach Slag can realize the efficient utilization of sulfur dioxide, so as to reach tail gas zero-emission, avoid environmental pollution.
Brief description of the drawings
Fig. 1 is apparatus of the present invention structural representation.
In figure：1- motors, 2- exhaust ports, the ring-like tail gas absorption rooms of 3-, the backflow adapter of 4- sulfur dioxide gas, 5- sulfur dioxide gas access ports, 6- heating steam connections, 7- ore pulp feed sockets, the order reaction room ore pulp overflow pipes of 8- II, 9- Ore pulp discharge port, 10- agitators, 11-I order reactions room ore pulp overflow pipe, 12- ore pulp overfalls, 13- air inlet pipe, 14- seal shafts Hold, 15-I order reactions room, the order reaction rooms of 16- II, the ring-like I levels inlet plenums of 17-, the ring-like II grade of inlet plenum of 18-, the exhaust of 19-I levels Room, II grade of exhaust chamber of 20-, 21- agitating shaft sealing sleeve pipes.
Embodiment
With reference to the accompanying drawings and detailed description, the invention will be further described.
Embodiment 1
This leaches the method for zinc leaching residue with sulfur dioxide controlling potential method, and it is comprised the following steps that：
（1）According to mass ratio it is 5 first by 1000g zinc leaching residues and zinc concentrate:1 is well mixed, then carries out pulp and obtains To pulp material；The composition of wherein zinc leaching residue and zinc concentrate is as shown in table 1；
The main chemical compositions content of table 1（wt.%）
（2）By step（1）Obtained pulp material is 6 according to liquid-solid ratio：1mL/g adds sulfur acid 180g/L wet method refining Liquid after zinc electrolysis, 0.1MPa sulfur dioxide gas is passed through under the conditions of being 90 DEG C in temperature, 4h is reacted under agitation, whole During control system and terminal current potential 300mv, obtain Fe after the completion of reaction3+Leachate less than 3g/L.
The leaching rate of zinc is 98.1% in the present embodiment, and the leaching rate of indium is 96.2%, the leaching rate of copper is 97.3%, is leached Fe in liquid3+Concentration is 2.97g/L.
As shown in figure 1, this leaches the device of zinc leaching residue with sulfur dioxide controlling potential method, it is anti-by I, II two-stage cylinder type Device is answered to form, described I, II two-stage cylinder reactor includes agitating device, reative cell, ring-like inlet plenum, exhaust chamber and ore deposit Discharge port 9 is starched, II order reaction room 16 in the I order reactions room 15 and II two-stage cylinder reactor of I two-stage cylinder reactor Agitating device is inserted in inside, and I order reactions room 15 and the bottom of II order reaction room 16 are equipped with ore pulp discharge port 9, I order reactions room 15 It is internal be sequentially provided with upper ring-like tail gas absorption room 3, I levels exhaust chamber 19, ring-like I levels inlet plenum 17, with ring-like I levels air inlet The air inlet pipe 13 that 17 ring-like pipeline of room communicates, II order reaction room 16 are sequentially provided with II grade of exhaust chamber 20, ring-like II grade from top to bottom Inlet plenum 18, the air inlet pipe 13 communicated with ring-like II grade of inlet plenum, 18 ring-like pipeline, the top side of I order reactions room 15 are provided with tail gas Floss hole 2, the side lower part of I order reactions room 15 1 are provided with ore pulp feed socket 7 and heating steam connection 6, heated in steam connection 6 Steam (vapor) outlet is located at the slurry liquid level lower end of the addition of I order reactions room 15, and the reative cell that I order reactions room 15 is provided with air inlet pipe 13 passes through Ore pulp overfall 12 is provided with the reative cell of air inlet pipe 13 according to the order reaction room 16 of difference in height pipeline communication II, II order reaction room 16 II grade of exhaust chamber 20 connects the ring pipe of ring-like I levels inlet plenum 17 in I order reactions room 15 by sulfur dioxide gas backflow adapter 4 Road, another side bottom that II order reaction room 16 does not connect with I order reactions room 15 is provided with sulfur dioxide gas access port 5, heating is steamed The order reaction room ore pulp overflow pipe 8 of vapour adapter 6 and II.
The agitator 10 that wherein agitating device includes motor 1, is connected with motor 1, agitator 10 pass through stirring Sealing sleeve pipe 21 and ring-like tail gas absorption room 3 or inlet plenum（Ring-like II grade of inlet plenum 18 and ring-like I levels inlet plenum 17）Sealing, Agitator 10 is sealed by sealed bearings 14 and exhaust chamber；The end of II order reaction room ore pulp overflow pipe 8 is provided with ore pulp overfall 12.
Embodiment 2
This leaches the method for zinc leaching residue with sulfur dioxide controlling potential method, and it is comprised the following steps that：
（1）According to mass ratio it is 8 first by 1000g zinc leaching residues and zinc concentrate:1 is well mixed, then carries out pulp and obtains To pulp material；The composition of wherein zinc leaching residue and zinc concentrate is as shown in table 1；
（2）By step（1）Obtained pulp material is 8 according to liquid-solid ratio：1mL/g adds sulfur acid 150g/L wet method refining Liquid after zinc electrolysis, 0.3MPa sulfur dioxide gas is passed through under the conditions of being 120 DEG C in temperature, 3h is reacted under agitation, whole Control system and terminal current potential 400mv, Fe is obtained after the completion of reaction during individual3+Leachate less than 3g/L.
The leaching rate of zinc is 98.3% in the present embodiment, and the leaching rate of indium is 96.3%, the leaching rate of copper is 97.2%, is leached Fe in liquid3+Concentration is 2.91g/L.
As shown in figure 1, this leaches the device of zinc leaching residue with sulfur dioxide controlling potential method, it is anti-by I, II two-stage cylinder type Device is answered to form, described I, II two-stage cylinder reactor includes agitating device, reative cell, ring-like inlet plenum, exhaust chamber and ore deposit Discharge port 9 is starched, II order reaction room 16 in the I order reactions room 15 and II two-stage cylinder reactor of I two-stage cylinder reactor Agitating device is inserted in inside, and I order reactions room 15 and the bottom of II order reaction room 16 are equipped with ore pulp discharge port 9, I order reactions room 15 It is internal be sequentially provided with upper ring-like tail gas absorption room 3, I levels exhaust chamber 19, ring-like I levels inlet plenum 17, with ring-like I levels air inlet The air inlet pipe 13 that 17 ring-like pipeline of room communicates, II order reaction room 16 are sequentially provided with II grade of exhaust chamber 20, ring-like II grade from top to bottom Inlet plenum 18, the air inlet pipe 13 communicated with ring-like II grade of inlet plenum, 18 ring-like pipeline, the top side of I order reactions room 15 are provided with tail gas Floss hole 2, the side lower part of I order reactions room 15 1 are provided with ore pulp feed socket 7 and heating steam connection 6, heated in steam connection 6 Steam (vapor) outlet is located at the slurry liquid level lower end of the addition of I order reactions room 15, and the reative cell that I order reactions room 15 is provided with air inlet pipe 13 passes through Ore pulp overfall 12 is provided with the reative cell of air inlet pipe 13 according to the order reaction room 16 of difference in height pipeline communication II, II order reaction room 16 II grade of exhaust chamber 20 connects the ring pipe of ring-like I levels inlet plenum 17 in I order reactions room 15 by sulfur dioxide gas backflow adapter 4 Road, another side bottom that II order reaction room 16 does not connect with I order reactions room 15 is provided with sulfur dioxide gas access port 5, heating is steamed The order reaction room ore pulp overflow pipe 8 of vapour adapter 6 and II.
The agitator 10 that wherein agitating device includes motor 1, is connected with motor 1, agitator 10 pass through stirring Sealing sleeve pipe 21 and ring-like tail gas absorption room 3 or inlet plenum（Ring-like II grade of inlet plenum 18 and ring-like I levels inlet plenum 17）Sealing, Agitator 10 is sealed by sealed bearings 14 and exhaust chamber；The end of II order reaction room ore pulp overflow pipe 8 is provided with ore pulp overfall 12.
Embodiment 3
This leaches the method for zinc leaching residue with sulfur dioxide controlling potential method, and it is comprised the following steps that：
（1）According to mass ratio it is 10 first by 1000g zinc leaching residues and zinc concentrate:1 is well mixed, then carries out pulp and obtains To pulp material；The composition of wherein zinc leaching residue and zinc concentrate is as shown in table 1；
（2）By step（1）Obtained pulp material is 10 according to liquid-solid ratio：1mL/g adds sulfur acid 130g/L wet method Zinc metallurgy electrolytic liquid, 0.3MPa sulfur dioxide gas is passed through under the conditions of being 100 DEG C in temperature, reacts 2h under agitation, Control system and terminal current potential 500mv, Fe is obtained after the completion of reaction in whole process3+Leachate less than 3g/L.
The leaching rate of zinc is 98.6% in the present embodiment, and the leaching rate of indium is 96.1%, the leaching rate of copper is 97.5%, is leached Fe in liquid3+Concentration is 2.89g/L.
As shown in figure 1, this leaches the device of zinc leaching residue with sulfur dioxide controlling potential method, it is anti-by I, II two-stage cylinder type Device is answered to form, described I, II two-stage cylinder reactor includes agitating device, reative cell, ring-like inlet plenum, exhaust chamber and ore deposit Discharge port 9 is starched, II order reaction room 16 in the I order reactions room 15 and II two-stage cylinder reactor of I two-stage cylinder reactor Agitating device is inserted in inside, and I order reactions room 15 and the bottom of II order reaction room 16 are equipped with ore pulp discharge port 9, I order reactions room 15 It is internal be sequentially provided with upper ring-like tail gas absorption room 3, I levels exhaust chamber 19, ring-like I levels inlet plenum 17, with ring-like I levels air inlet The air inlet pipe 13 that 17 ring-like pipeline of room communicates, II order reaction room 16 are sequentially provided with II grade of exhaust chamber 20, ring-like II grade from top to bottom Inlet plenum 18, the air inlet pipe 13 communicated with ring-like II grade of inlet plenum, 18 ring-like pipeline, the top side of I order reactions room 15 are provided with tail gas Floss hole 2, the side lower part of I order reactions room 15 1 are provided with ore pulp feed socket 7 and heating steam connection 6, heated in steam connection 6 Steam (vapor) outlet is located at the slurry liquid level lower end of the addition of I order reactions room 15, and the reative cell that I order reactions room 15 is provided with air inlet pipe 13 passes through Ore pulp overfall 12 is provided with the reative cell of air inlet pipe 13 according to the order reaction room 16 of difference in height pipeline communication II, II order reaction room 16 II grade of exhaust chamber 20 connects the ring pipe of ring-like I levels inlet plenum 17 in I order reactions room 15 by sulfur dioxide gas backflow adapter 4 Road, another side bottom that II order reaction room 16 does not connect with I order reactions room 15 is provided with sulfur dioxide gas access port 5, heating is steamed The order reaction room ore pulp overflow pipe 8 of vapour adapter 6 and II.
The agitator 10 that wherein agitating device includes motor 1, is connected with motor 1, agitator 10 pass through stirring Sealing sleeve pipe 21 and ring-like tail gas absorption room 3 or inlet plenum（Ring-like II grade of inlet plenum 18 and ring-like I levels inlet plenum 17）Sealing, Agitator 10 is sealed by sealed bearings 14 and exhaust chamber；The end of II order reaction room ore pulp overflow pipe 8 is provided with ore pulp overfall 12.
Above in association with accompanying drawing to the present invention embodiment be explained in detail, but the present invention be not limited to it is above-mentioned Embodiment, can also be before present inventive concept not be departed from those of ordinary skill in the art's possessed knowledge Put that various changes can be made.

Claims (4)

  1. A kind of 1. method that zinc leaching residue is leached with sulfur dioxide controlling potential method, it is characterised in that：By zinc leaching residue and zinc essence Ore deposit mixes pulp, is passed through sulfur dioxide gas at being 90~120 DEG C in temperature, 2~4h is reacted under agitation, by slurry Material carries out hot acid reducing leaching, and control system and terminal 300~500mv of current potential, Fe is obtained after the completion of reaction in whole process3+ Leachate less than 3g/L；
    Comprise the following steps that：
    （1）According to mass ratio it is 5 first by zinc leaching residue and zinc concentrate:1~10:1 is well mixed, then carries out pulp and is starched Compound material；
    （2）By step（1）Obtained pulp material is 6~10 according to liquid-solid ratio：1mL/g adds 130~180g/L's of sulfur acid Zinc hydrometallurgy electrolytic liquid, sulfur dioxide gas is passed through under the conditions of being 90~120 DEG C in temperature, reacts 2~4h under stirring condition, Control system and terminal 300~500mv of current potential, Fe is obtained after the completion of reaction in whole process3+Leachate less than 3g/L.
  2. 2. a kind of application of the method according to claim 1 that zinc leaching residue is leached with sulfur dioxide controlling potential method fills Put, it is characterised in that：It is made up of I, II two-stage cylinder reactor, described I, II two-stage cylinder reactor includes stirring dress Put, reative cell, ring-like inlet plenum, exhaust chamber and ore pulp discharge port（9）, the I order reactions room of I grade of cylinder reactor（15）With II II order reaction room in level cylinder reactor（16）Agitating device, I order reactions room are inserted in inside（15）With II order reaction room （16）Bottom is equipped with ore pulp discharge port（9）, I order reactions room（15）Inside is sequentially provided with ring-like tail gas absorption room from top to bottom （3）, I level exhaust chambers（19）, ring-like I levels inlet plenum（17）And ring-like I levels inlet plenum（17）The air inlet pipe that ring-like pipeline communicates （13）, II order reaction room（16）II grade of exhaust chamber is sequentially provided with from top to bottom（20）, ring-like II grade of inlet plenum（18）And ring-like II Level inlet plenum（18）The air inlet pipe that ring-like pipeline communicates（13）, I order reactions room（15）Top side is provided with exhaust port（2）, I Order reaction room（15）One side lower part is provided with ore pulp feed socket（7）With heating steam connection（6）, heat steam connection（6）In Steam (vapor) outlet is located at I order reactions room（15）The slurry liquid level lower end of addition, I order reactions room（15）Provided with air inlet pipe（13）Reaction Room passes through ore pulp overfall（12）According to the order reaction room of difference in height pipeline communication II（16）Provided with air inlet pipe（13）Reative cell, II Order reaction room（16）II grade of exhaust chamber（20）Flowed back and taken over by sulfur dioxide gas（4）Connect I order reactions room（15）Middle ring Type I level inlet plenums（17）Circulating line, II order reaction room（16）Not with I order reactions room（15）Another side bottom of connection is provided with Sulfur dioxide gas access port（5）, heating steam connection（6）With II order reaction room ore pulp overflow pipe（8）.
  3. 3. the application apparatus of the method according to claim 2 that zinc leaching residue is leached with sulfur dioxide controlling potential method, its It is characterised by：The agitating device includes motor（1）With motor（1）The agitator of connection（10）, agitator（10） Pass through agitating shaft sealing sleeve pipe（21）Sealed with absorption chamber or inlet plenum, agitator（10）Pass through sealed bearings（14）With exhaust chamber Sealing.
  4. 4. the application apparatus of the method according to claim 2 that zinc leaching residue is leached with sulfur dioxide controlling potential method, its It is characterised by：The II order reaction room ore pulp overflow pipe（8）End is provided with ore pulp overfall（12）.
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