CN102899497A - Zinc leaching slag treatment device and treatment process - Google Patents
Zinc leaching slag treatment device and treatment process Download PDFInfo
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- CN102899497A CN102899497A CN201210279820XA CN201210279820A CN102899497A CN 102899497 A CN102899497 A CN 102899497A CN 201210279820X A CN201210279820X A CN 201210279820XA CN 201210279820 A CN201210279820 A CN 201210279820A CN 102899497 A CN102899497 A CN 102899497A
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Abstract
The invention discloses a zinc leaching slag treatment device and a treatment process by using the device. The zinc leaching slag treatment device comprises a furnace body, wherein the furnace body limits a molten pool and comprises an upper furnace body, an intermediate furnace body and a furnace hearth; the furnace body comprises a zinc leaching slag and flux feed inlet, an exhaust opening, a slag removal opening, an air compensation opening and a spray gun jack formed on the sidewall of the furnace body; a side blowing spray gun is also provided on the device, and the side blowing spray gun is inserted in the spray gun jack and is used for injecting oxygen containing gas and fuel in the molten pool as well as injecting the oxygen containing gas and a reducing agent in the molten pool. The zinc leaching slag treatment device and the treatment process by using the device have the advantages of less energy consumption, low production cost and high recovery rate of zinc, lead, silver and dissipated metals, and can improve the operating environment.
Description
Technical field
The present invention relates to a kind of non-ferrous metal metallurgy, especially the treatment unit of zinc leaching residue and treatment process.
Background technology
Zinc leaching residue treatment process commonly used is rotary kiln evaporation method at present.But there is obvious shortcoming in rotary kiln evaporation method, and for example, capacity of equipment is low, lining life is short, and comprehensive energy consumption is high, needs price to need expensive coke, occupation area of equipment is large, and operating environment is poor, and the rate of recovery such as valuable metal such as silver, indium, germanium of other valuable metal in the zinc leaching residue are low.
Summary of the invention
The present invention is intended to solve the problems of the technologies described above at least to a certain extent or provides at least a kind of useful commerce to select.
For this reason, the first purpose of the present invention is to propose a kind of zinc leaching residue treatment unit, the zinc leaching residue treatment unit can carry out harmless treatment to zinc leaching residue, improve the comprehensive utilization of resources level, to improve operating environment, reduce energy consumption and cost, and the slag making melting of zinc leaching residue and reduction carry out in single stove, especially be suitable for the few situation for the treatment of capacity.
Second purpose of the present invention is to propose a kind of zinc leaching residue treatment process, can carry out harmless treatment to zinc leaching residue by this zinc leaching residue treatment process, improves the comprehensive utilization of resources level, to improve operating environment, reduces energy consumption and cost.
According to a first aspect of the invention, a kind of zinc leaching residue treatment unit is provided, comprise: body of heater, described body of heater limits the molten bath and comprises upper furnace body, middle body of heater, lower furnace body and cupola well, and described body of heater has zinc leaching residue and flux charging opening, smoke outlet, slag-drip opening, wind-supplying mouth and is formed on spray gun socket on the described sidewall of the furnace body; And side-blown spray gun, described side-blown spray gun is plugged in the described spray gun socket, for spraying into oxygen-containing gas and fuel and be used for spraying into oxygen-containing gas and reductive agent in described molten bath in described molten bath.
Zinc leaching residue treatment unit according to the embodiment of the invention has following beneficial effect at least:
1) the zinc leaching residue treatment unit of the embodiment of the invention can be processed zinc leaching residue, fully reclaim the valuable metals such as zinc in the zinc leaching residue, therefore metals resources that can either saves valuable can prevent from again containing the zinc leaching residue of the valuable metal such as zinc to environment;
Therefore 2) the zinc leaching residue treatment unit of the embodiment of the invention carries out slag making melting and reduction in single stove, compare with existing rotary kiln to have higher level of automation, equipment and energy-saving effect, and the rate of recovery of the valuable metal such as zinc improves;
3) the zinc leaching residue treatment unit of the embodiment of the invention can use the cheap reductive agent such as coal dust effectively to process zinc leaching residue, therefore compares with the rotary kiln of existing use metallurgical coke, and above-mentioned zinc leaching residue treatment unit can the decrease production cost;
4) the zinc leaching residue treatment unit continuity of the embodiment of the invention is strong and have good stopping property, so operating rate is high and can prevent that flue gas from revealing, and the working space that can greatly reduce in operational process the workman pollutes, and significantly improves production environment.
In addition, zinc leaching residue treatment unit according to the above embodiment of the present invention can also have following additional technical characterictic:
Preferably, waste heat boiler, described waste heat boiler links to each other with described smoke outlet; With
Dust-precipitator, described dust-precipitator links to each other with described waste heat boiler, is used for collecting the flue dust from the flue gas of described smoke outlet discharge.
Preferably, described waste heat boiler comprises: the transition section flue, and this transition section flue comprises riser portions and falling portion, and the upper end of riser portions links to each other with the upper end of falling portion, and the lower end of described riser portions links to each other with described smoke outlet; With the convection zone flue, this convection zone flue advance that mouth links to each other with the lower end of the falling portion of described transition section flue and the smoke end of described convection zone flue is formed with smoke outlet, and be provided with convection bank in the described convection zone flue.
Preferably, described cupola well has escape orifice.
Preferably, described smoke outlet is located at the top of described upper furnace body.
Preferably, the furnace wall of described upper furnace body is membrane wall structure, and described middle body of heater is jacket structure for water, and described lower furnace body constitutes the structure that lining refractories adds water jacket.
According to a second aspect of the invention, provide a kind of zinc leaching residue treatment process that utilizes described zinc leaching residue treatment unit to carry out, may further comprise the steps: zinc leaching residue and flux are joined in the described body of heater from described zinc leaching residue and flux charging opening; By described side-blown spray gun oxygen-containing gas and fuel are injected in the described molten bath to finish slag making melting and part dilution and restore zinc and other valuable metal in the described zinc leaching residue, obtain comprising the flue gas of the flue dust that contains zinc and other valuable metal; By described side-blown spray gun oxygen-containing gas and reductive agent are sprayed in the described molten bath with dilution and to restore zinc and other valuable metal in the described melting slag, obtain comprising flue gas and the waste of the flue dust that contains zinc and other valuable metal; With discharge described waste from described slag-drip opening.
Zinc leaching residue treatment process according to the embodiment of the invention has following beneficial effect at least:
1) by implementing the zinc leaching residue treatment process of the embodiment of the invention, can fully reclaim the valuable metals such as zinc in the zinc leaching residue, metals resources that therefore can either saves valuable can prevent from again containing the zinc leaching residue of the valuable metal such as zinc to environment;
2) in single stove, melt serially the dilution process by the zinc leaching residue treatment process of implementing the embodiment of the invention, therefore can improve to a certain extent the rate of recovery to valuable metals such as zinc.
Preferably, described zinc leaching residue treatment unit comprises waste heat boiler, dust-precipitator, and described zinc leaching residue treatment process also comprises: by the waste heat of described waste heat boiler recovery from the flue gas that described smoke outlet is discharged; With
By the described flue dust that contain zinc and other valuable metal of described dust-precipitator collection from the flue gas that described smoke outlet is discharged.
Preferably, described zinc leaching residue treatment process also comprises from described escape orifice discharge lead bullion or matte.
Preferably, the temperature in the described molten bath of described slag making smelt stage is 1150～1250 ℃, and the temperature in reduction described molten bath of dilution stage is 1250～1350 ℃.
Preferably, described fuel and reductive agent are fine coal, Sweet natural gas, coal gas or liquefied petroleum gas (LPG), and the volume ratio of oxygen is 25%～40% in the described oxygen-containing gas of described slag making smelt stage, is air at described described oxygen-containing gas of reduction dilution stage.
Preferably, described other valuable metal comprises at least a in indium, germanium and the silver.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 is the front view according to the zinc leaching residue treatment unit of the embodiment of the invention.
Fig. 2 is the side-view according to the zinc leaching residue treatment unit of the embodiment of the invention.
Fig. 3 is the structural representation according to the waste heat boiler of the zinc leaching residue treatment unit of the embodiment of the invention.
Fig. 4 is the schematic flow sheet according to the zinc leaching residue treatment process of the embodiment of the invention.
Description of symbols:
1 body of heater; 4 waste heat boilers; 11 upper furnace bodies; Body of heater in 12; 13 lower furnace bodies; 14 cupola wells; 15 side-blown spray guns; 41 transition section flues; 42 convection zone flues; 111 zinc leaching residues and flux charging opening; 112 smoke outlets; 131 spray gun sockets; 132 slag-drip openings; 133 escape orifices; 134 wind-supplying mouths; 411 riser portions; 412 falling portion; 421 smoke outlets; 422 convection banks.
Embodiment
The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center "; " laterally "; " vertically "; " length "; " width "; " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " level ", " vertically ", " top ", " end ", " interior ", " outward ", " clockwise ", orientation or the position relationship of indications such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only be for convenience of description the present invention and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " ", " second ".In description of the invention, except as otherwise noted, the implication of " a plurality of " is two or more, unless clear and definite restriction is arranged in addition.
In the present invention, unless clear and definite regulation and restriction are arranged in addition, broad understanding should be done in the terms such as term " installation ", " linking to each other ", " connection ", " fixing ", for example, can be to be fixedly connected with, and also can be to removably connect, or connect integratedly; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can indirectly link to each other by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.
In the present invention, unless clear and definite regulation and restriction are arranged in addition, feature Second Characteristic it " on " or D score can comprise with Second Characteristic and directly contacting, also can comprise and Second Characteristic is not directly contact but by the other feature contact between them.And, feature Second Characteristic " on ", " top " and " above " comprise feature directly over Second Characteristic and oblique upper, or only the representation feature level height is higher than Second Characteristic.Feature Second Characteristic " under ", " below " and " below " comprise feature directly over Second Characteristic and oblique upper, or only the representation feature level height less than Second Characteristic.
Below with reference to the zinc leaching residue treatment unit of accompanying drawing description according to the embodiment of the invention
As shown in Figure 1 to Figure 3, zinc leaching residue treatment unit according to the embodiment of the invention comprises body of heater 1, this body of heater 1 limits the molten bath and comprises upper furnace body 11, middle body of heater 12, lower furnace body 13 and cupola well 14, and body of heater 1 has zinc leaching residue and flux charging opening 111, smoke outlet 112, slag-drip opening 132, wind-supplying mouth 134 and is formed on spray gun socket 131 on the sidewall of the furnace body; With side-blown spray gun 15, this side-blown spray gun 15 is plugged in the spray gun socket 131, for spraying into oxygen-containing gas and fuel and be used for spraying into oxygen-containing gas and reductive agent in described molten bath in described molten bath.
The zinc leaching residue treatment unit of the embodiment of the invention can be processed zinc leaching residue, fully reclaim the valuable metals such as zinc in the zinc leaching residue, therefore metals resources that can either saves valuable can prevent from again containing the zinc leaching residue of the valuable metal such as zinc to environment; The zinc leaching residue treatment unit of the embodiment of the invention carries out slag making melting and dilution reduction in single stove, thereby can process continuously, compare with existing rotary kiln and to have higher level of automation and equipment, equipment investment cost is low, and the rate of recovery of the valuable metal such as zinc improves; The zinc leaching residue treatment unit of the embodiment of the invention can use the cheap reductive agent such as coal dust effectively to process zinc leaching residue, therefore compares with the rotary kiln of existing use metallurgical coke, and above-mentioned zinc leaching residue treatment unit can the decrease production cost; The zinc leaching residue treatment unit continuity of the embodiment of the invention is strong and have a good stopping property, so operating rate is high and can prevent the flue gas leakage, the working space that can greatly reduce in operational process the workman pollutes, and significantly improves production environment, is particularly suitable for the situation for the treatment of capacity when few.
As illustrated in fig. 1 and 2, be formed with zinc leaching residue and flux charging opening 111, smoke outlet 112 and tertiary air orifice (not shown) on the outer wall of upper furnace body 11.
Zinc leaching residue and flux charging opening 111 are used for adding the materials such as zinc leaching residue and flux to the inside of body of heater, and it can be formed on the optional position on upper furnace body 11 outer walls, for example on the sidewall or top.In an embodiment of the present invention, zinc leaching residue and flux charging opening 111 are arranged on the sidewall of upper furnace body 11, thereby are convenient to link to each other with the miscellaneous equipment of upstream.And the zinc leaching residue and the flux charging opening 111 that are arranged on the sidewall can also be for operation facilitate, the efficient thereby raising is fed in raw material.
In addition, as shown in Figure 1, in a preferred embodiment of the invention, upper furnace body 11 is provided with rake, and upper furnace body 11 is in the bottom-up toward the outer side inclination of the sidewall of this rake, go to the bottom long trapezoidally so that the planeform of the upper furnace body 11 of observing from direction shown in Figure 1 is upper base, smoke outlet 112 is arranged on the end face of rake of upper furnace body 11.So, can either allow at upper furnace body 11 tops more parts to be set, to take full advantage of headspace, the size of body of heater 12 and lower furnace body 13 in can avoiding again increasing, thus be conducive to realize the miniaturization of equipping.
Tertiary air orifice is to be arranged on the opening that the permission gas on the body of heater 1 enters, by this tertiary air orifice is set, can be blown into from this tertiary air orifice the ignition dopes such as air in the body of heater 1, with the CO in the flue gas and volatilization metallic vapor combustion oxidation, prevent environment.
Tertiary air orifice can arrange the optional position on body of heater 1, such as sidepiece or top, the sidepiece of middle body of heater 12 or the sidepiece of lower furnace body 13 of upper furnace body 11, as long as can realize above-mentioned effect.In a preferred embodiment of the present invention, tertiary air orifice is the opening that is arranged at upper furnace body 11 sidepieces, thereby utilize the heat of the high-temperature flue gas in the body of heater itself with the CO in the flue gas and the metallic vapor combustion oxidation that volatilizees, namely realized preventing the purpose to environment, solved the energy.
Middle body of heater 12 is the cavity configuration that opens wide up and down, and this cavity configuration can be straight tube or curved cylinder.In an embodiment of the present invention, enter into as much as possible upper furnace body 11 in order to make the high-temperature flue gas in the furnace chamber, preferably middle body of heater 12 is formed the straight tube of extending along the vertical direction.
The outer wall of middle body of heater 12 can form various structures, as long as can surround into internal cavity.In an embodiment of the present invention, the preferred employing has the middle body of heater 12 of jacket structure for water, thereby lowers the temperature by this jacket structure for water centering body of heater 12.
The outer wall of lower furnace body 13 can form various structures, as long as can surround into internal cavity.For example, in an embodiment of the present invention, lower furnace body 13 constitutes the structure that lining refractories adds water jacket, thereby lower furnace body 13 is lowered the temperature.
As shown in Figure 2, be formed with spray gun socket 131 and slag-drip opening 132 on the lower furnace body 13.
Slag-drip opening 132 can on the sidewall that is arranged on lower furnace body 13, be used for discharging waste.
As shown in Figure 2, the bottom of cupola well 14 can also be provided with escape orifice 133.So, just can in the zinc leaching residue smelting process, give off lead bullion and/or matte from cupola well 14, both reclaim lead and/or matte, prevent that again lead and/or matte are for the pollution of environment.
As shown in Figure 2, an end of side-blown spray gun 15 is inserted in spray gun socket 131, and the other end connects the material supply source, is used for spraying the materials such as oxygen-containing gas, fuel, reductive agent in the molten bath.And, can also be arranged at the wind-supplying mouth 134 of internal communication on the body of heater, in order to be blown into secondary air by this wind-supplying mouth 134 in the molten bath, increase is blown into effect.
In addition, at a kind of embodiment of the present invention, the zinc leaching residue treatment unit can also comprise waste heat boiler and dust-precipitator.Wherein, waste heat boiler links to each other with smoke outlet 112, be used for to receive from the high-temperature flue gas of body of heater 1 and reclaims the heat of this high-temperature flue gas.Dust-precipitator links to each other with waste heat boiler, is used for collecting the flue dust that contains zinc from the flue gas of smoke outlet 112 discharges.
Like this, on the one hand can be reclaimed the heat the high-temperature flue gas of discharging from body of heater 1 and the heat that reclaims is re-used (for example generate electricity, heat) by waste heat boiler, be reduced comprehensive energy consumption; On the other hand, can also reclaim flue dust in the high-temperature flue gas that body of heater 1 discharges by dust-precipitator, to avoid contaminate environment.
As shown in Figure 3, waste heat boiler can comprise transition section flue 41 and convection zone flue 42.
Wherein, transition flue duct 41 has upper end (being the upper end among Fig. 3) riser portions 411 and the falling portion 412 that are interconnected, and the lower end of riser portions 411 (being the lower end among Fig. 4) links to each other with 212 with corresponding smoke outlet 112.
The mouth that advances of convection zone flue 42 links to each other with the lower end of the falling portion 412 of transition section flue 41, and the smoke end of convection zone flue 42 is formed with for the smoke outlet 421 continuous with corresponding dust-precipitator.And, in a preferred embodiment of the invention, as shown in Figure 3, be provided with convection bank 422 in the convection zone flue 42.
Owing to being provided with transition section flue 41, therefore when the high-temperature flue gas that contains dust entered transition section flue 41, in the process that rises, the dust in the high-temperature flue gas can rely on gravity to fall, thereby prevents that dust from adhering on the inwall of body of heater.Thus, can reduce the dust stratification in the body of heater 1 and remove ash manipulation, improve life-span and the waste heat recovery efficient of body of heater.And, because transition section flue 41 has riser portions 411 and falling portion 412, therefore increased the length of flue, prolonged the time that high-temperature flue gas moves in flue, the efficient that reclaims thus heat from high-temperature flue gas further improves.In addition, by convection bank 422 being set convection pass 42 is interior, can also further improve the efficient that from high-temperature flue gas, reclaims heat.
The embodiment of the invention also provides the zinc leaching residue treatment process of this above-mentioned zinc leaching residue treatment unit of a kind of application.Fig. 4 is the schematic flow sheet according to the zinc leaching residue treatment process of the embodiment of the invention, and as shown in Figure 4, the zinc leaching residue treatment process in the embodiment of the invention may further comprise the steps:
S1) zinc leaching residue and flux are joined in the described body of heater from described zinc leaching residue and flux charging opening;
S2) by described side-blown spray gun oxygen-containing gas and fuel are injected in the described molten bath to finish slag making melting and part dilution and restore zinc and other valuable metal in the described zinc leaching residue, obtain comprising the flue gas of the flue dust that contains zinc and other valuable metal;
S3) by described side-blown spray gun oxygen-containing gas and reductive agent are sprayed in the described molten bath with dilution and restore zinc and other valuable metal in the described melting slag, obtain comprising flue gas and the waste of the flue dust that contains zinc and other valuable metal; With
S4) discharge described waste from the flue gas of described smoke outlet discharge and from described slag-drip opening.
Zinc leaching residue treatment process according to the embodiment of the invention has following beneficial effect at least:
By implementing the zinc leaching residue treatment process of the embodiment of the invention, can fully reclaim the valuable metals such as zinc in the zinc leaching residue, metals resources that therefore can either saves valuable can prevent from again containing the zinc leaching residue of the valuable metal such as zinc to environment; In single stove, melt serially the dilution process by the zinc leaching residue treatment process of implementing the embodiment of the invention, therefore can improve to a certain extent the rate of recovery to valuable metals such as zinc.
In addition, preferably, described zinc leaching residue treatment process also comprises the steps:
By the waste heat of described waste heat boiler recovery from the flue gas that described smoke outlet is discharged; With
By the described flue dust that contain zinc and other valuable metal of described dust-precipitator collection from the flue gas that described smoke outlet is discharged.
Like this, the heat in the high-temperature flue gas that can fully discharge body of heater 1 by waste heat boiler is on the one hand reclaimed and the heat that reclaims is re-used (for example generate electricity, heat), reduces comprehensive energy consumption; On the other hand, can also reclaim flue dust in the high-temperature flue gas that body of heater 1 discharges by dust-precipitator, to avoid contaminate environment.
In addition, preferably, described zinc leaching residue treatment process comprises the steps: that also described zinc leaching residue treatment process also comprises from described escape orifice discharge lead bullion or matte.
In addition, in above-mentioned treatment process, preferably, temperature in the described molten bath of described slag making smelt stage is 1150～1250 ℃, temperature in reduction described molten bath of dilution stage is 1250～1350 ℃, so that the zinc in the zinc leaching residue is fully gasified, thus improve the rate of recovery of zinc.
And employed fuel and reductive agent also can be for this area various fuel and reductive agent commonly used, such as industrial coke in above-mentioned treatment process.Yet from reducing the angle of cost, the preferential materials such as fine coal, Sweet natural gas, coal gas or liquefied petroleum gas (LPG) that adopt are as reductive agent in the above-mentioned technique.
In addition, the contriver finds through great many of experiments, is 25%～40% in the volume ratio of slag making smelt stage oxygen in the oxygen-containing gas in the body of heater 1, and is when dilution reduction phase oxygen-containing gas is air, comparatively abundant to the processing of zinc leaching residue.
In addition, other valuable metal that reclaims by dust-precipitator comprises at least a in indium, germanium and the silver.
In addition, in a specific embodiment of above-mentioned zinc leaching residue treatment process, each main component and proportion are respectively in the zinc leaching residue that needs to smelt: Zn 8%～20%, Fe/SiO
20.8～1.6(weight ratio), CaO/SiO
20.2～0.6(weight ratio).And by mass percentage, the zinc leaching residue main component is as follows: Zn 8.66%, and Pb 1.29%, and Cu 0.46%, and Fe 40%, SiO
21.29%, CaO 0.37%.
And in above-mentioned specific embodiment, the bath temperature in the body of heater 1 is 1150-1250 ℃, and the shared volume ratio of the oxygen in the oxygen-containing gas is 30%.After body of heater 1 melting, obtain molten slag and the Zn dust that contains lead, indium, silver.Wherein by mass percentage, the molten slag main component is as follows: Zn 5.34%, and Pb 0.88%, and Cu 0.41%, and Fe 37.25%, SiO
223.38%, CaO 9.39%.
Above-mentioned molten slag is by carrying out the dilution blowing, and bath temperature is 1250-1350 ℃, and oxygen-containing gas is air, and for example the shared volume ratio of airborne oxygen is 21%.After the dilution reduction, output contains Zn dust and the slag of lead, indium, silver, and slag discharges after shrend, and wherein by mass percentage, the slag main component is as follows: Zn 1.62%, and Pb 0.12%, and Cu 0.42%, and Fe 38.1%, SiO
225.39%, CaO 9.94%.
In addition, the slag that obtains by the leached mud treatment unit in the embodiment of the invention can also be as the raw material of making cement.
By the above results as can be known, after utilizing the zinc leaching residue treatment unit of the embodiment of the invention, by the zinc leaching residue treatment process of the embodiment of the invention zinc leaching residue being processed continuously, contained zinc and plumbous mass percent decrease in the slag that produces can be to environment.Therefore, the metals resources that above-mentioned zinc leaching residue treatment process can either saves valuable can prevent from again containing zinc and plumbous etc. to environment.
And through comparing with the existing treatment process of use rotary kiln under the same terms, contained zinc and plumbous mass percent are obviously lower in the slag that the zinc leaching residue treatment process by the embodiment of the invention obtains.Therefore, above-mentioned zinc leaching residue treatment process can improve the rate of recovery to valuable metals such as zinc to a certain extent.
In the description of this specification sheets, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or the example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although the above has illustrated and has described embodiments of the invention, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art is not in the situation that break away from principle of the present invention and aim can change above-described embodiment within the scope of the invention, modification, replacement and modification.
Claims (12)
1. a zinc leaching residue treatment unit is characterized in that, comprising:
Body of heater, described body of heater limit the molten bath and comprise upper furnace body, middle body of heater, lower furnace body and cupola well, and described body of heater has zinc leaching residue and flux charging opening, smoke outlet, slag-drip opening, wind-supplying mouth and is formed on spray gun socket on the described sidewall of the furnace body; With
Side-blown spray gun, described side-blown spray gun are plugged in the described spray gun socket, for spraying into oxygen-containing gas and fuel and be used for spraying into oxygen-containing gas and reductive agent in described molten bath in described molten bath.
2. zinc leaching residue treatment unit according to claim 1 is characterized in that, also comprises:
Waste heat boiler, described waste heat boiler links to each other with described smoke outlet; With
Dust-precipitator, described dust-precipitator links to each other with described waste heat boiler, is used for collecting the flue dust from the flue gas of described smoke outlet discharge.
3. zinc leaching residue treatment unit according to claim 2 is characterized in that, described waste heat boiler comprises:
The transition section flue, this transition section flue comprises riser portions and falling portion, and the upper end of riser portions links to each other with the upper end of falling portion, and the lower end of described riser portions links to each other with described smoke outlet; With
The convection zone flue, this convection zone flue advance that mouth links to each other with the lower end of the falling portion of described transition section flue and the smoke end of described convection zone flue is formed with smoke outlet, and be provided with convection bank in the described convection zone flue.
4. zinc leaching residue treatment unit according to claim 1 is characterized in that, described cupola well has escape orifice.
5. zinc leaching residue treatment unit according to claim 1 is characterized in that, described smoke outlet is located at the top of described upper furnace body.
6. zinc leaching residue treatment unit according to claim 1 is characterized in that, the furnace wall of described upper furnace body is membrane wall structure, and described middle body of heater is jacket structure for water, and described lower furnace body constitutes the structure that lining refractories adds water jacket.
7. the zinc leaching residue treatment process that each described zinc leaching residue treatment unit carries out in the utilization according to claim 1-6 is characterized in that, may further comprise the steps:
S1) zinc leaching residue and flux are joined in the described body of heater from described zinc leaching residue and flux charging opening;
S2) by described side-blown spray gun oxygen-containing gas and fuel are injected in the described molten bath to finish slag making melting and part dilution and restore zinc and other valuable metal in the described zinc leaching residue, obtain comprising the flue gas of the flue dust that contains zinc and other valuable metal;
S3) by described side-blown spray gun oxygen-containing gas and reductive agent are sprayed in the described molten bath with dilution and restore zinc and other valuable metal in the described melting slag, obtain comprising flue gas and the waste of the flue dust that contains zinc and other valuable metal; With
S4) discharge described waste from the flue gas of described smoke outlet discharge and from described slag-drip opening.
8. zinc leaching residue treatment process according to claim 7 is characterized in that, described zinc leaching residue treatment unit is for according to claim 2 or 3 described zinc leaching residue treatment unit, and described zinc leaching residue treatment process also comprises:
By the waste heat of described waste heat boiler recovery from the flue gas that described smoke outlet is discharged; With
By the described flue dust that contain zinc and other valuable metal of described dust-precipitator collection from the flue gas that described smoke outlet is discharged.
9. zinc leaching residue treatment process according to claim 8 is characterized in that, described zinc leaching residue treatment process also comprises from described escape orifice discharges lead bullion or matte.
10. zinc leaching residue treatment process according to claim 7 is characterized in that, the temperature in the described molten bath of described slag making smelt stage is 1150～1250 ℃, and the temperature in reduction described molten bath of dilution stage is 1250～1350 ℃.
11. zinc leaching residue treatment process according to claim 7, it is characterized in that, described fuel and reductive agent are fine coal, Sweet natural gas, coal gas or liquefied petroleum gas (LPG), and the volume ratio of oxygen is 25%～40% in the described oxygen-containing gas of described slag making smelt stage, is air at described described oxygen-containing gas of reduction dilution stage.
12. zinc leaching residue treatment process according to claim 7 is characterized in that, described other valuable metal comprises at least a in indium, germanium and the silver.
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