CN101899580B - Zinc concentrate smelting equipment - Google Patents
Zinc concentrate smelting equipment Download PDFInfo
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- CN101899580B CN101899580B CN2010102344443A CN201010234444A CN101899580B CN 101899580 B CN101899580 B CN 101899580B CN 2010102344443 A CN2010102344443 A CN 2010102344443A CN 201010234444 A CN201010234444 A CN 201010234444A CN 101899580 B CN101899580 B CN 101899580B
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Abstract
The invention relates to zinc concentrate smelting equipment which comprises an oxygen bottom blowing melting furnace, a side-blowing reduction furnace and a liquid metal condenser, wherein the oxygen bottom blowing melting furnace is provided with a feeding hole, a flue gas outlet, a melt outlet and an oxygen injecting hole arranged at the bottom; the side-blowing reduction furnace is provided with a melt feeding hole, a zinc-containing flue gas outlet, an oxygen and reducing agent injecting hole formed on the side surface and a slag outlet, wherein the melt feeding hole is connected with the melt outlet of the oxygen bottom blowing melting furnace; the liquid metal condenser is connected with the zinc-containing flue gas outlet of the side-blowing reduction furnace to be used for condensing zinc in zinc-containing flue gas. The zinc concentrate smelting equipment can realize clean production and also simplify a technological process, thereby lowering the capital investment and the production cost and particularly and greatly saving the energy and reducing the emission.
Description
Technical field
The invention belongs to smelting field of nonferrous metal, especially relate to a kind of Zinc concentrate smelting equipment.
Background technology
The tradition pyrometallurgy of zinc needs earlier zinc ore concentrate oxidizing roasting, and calcining adds coal dust again, mixes to pinch being pressed into agglomerate, and agglomerate is through the preheating of coke oven close-burning, hot agglomerate with the coke preheater preheating good＞800 ℃ hot coke adds distilling furnace production crude zinc.This technical process is long, energy consumption is high, and the group of pressure and close-burning operating environment are abominable, all eliminates this technology abroad.If the melting lead and zinc concentrate adopts Imperial smelting process (Imperial Smelting Process is hereinafter to be referred as ISP).And, adopt the imperial smelting furnace melting, need to use fuming furnace, need carry out sintering and fragmentation to concentrate, therefore have serious environmental issue, and energy consumption is high.In sintering process, the back powder rate is up to 75～85%, and a large amount of back powders need through crushing operation repeatedly, and airborne dust is difficult to control.In addition, the sinter fume amount is big, SO
2Concentration is low, generally is no more than 5%, and the residual sulphur of agglomerate is high, and the recovery of sulphur is low.The SO that produces in the sintering work
2With the low vacancy pollution of lead dust be the chronic disease of this technology always.In addition, this technical process is longer, at high temperature damages easily to feed and discharge devices such as the additional agglomerate insulation storehouse of blast furnace feed, coke preheaters, causes maintenance load bigger.In addition, in order to reduce exhaust gas volumn and to improve the concentration of zinc fume in the flue gas, generally need be preheated to more than 800 ℃ during the blast furnace air feed.In order to meet this requirement, adopt Cowper stove preheating air blast traditionally, cause the investment of this technology high.
Summary of the invention
The present invention is intended to solve at least one of technical problem that exists in the prior art.For this reason, one object of the present invention is to propose the Zinc concentrate smelting equipment that a kind of clean environment firendly, process simplification, cost and energy consumption reduce.
Zinc concentrate smelting equipment according to the embodiment of the invention comprises: oxygen bottom-blowing stove, said oxygen bottom-blowing stove and accessory have charging opening, exhanst gas outlet, melt outlet and are positioned at the oxygen entrance of its bottom; Side-blown reduction furnace, said side-blown reduction furnace have melt and add inlet, contain the zinc exhanst gas outlet, are formed on its lateral oxygen and injection of reducing agent inlet and slag notch, and wherein said melt adds inlet and links to each other with the melt outlet of said oxygen bottom-blowing stove; The liquid metal condensing surface, the zinc exhanst gas outlet that contains of said liquid metal condensing surface and said side-blown reduction furnace links to each other and is used for the zinc that condensation contains the zinc flue gas.Oxygen bottom-blowing stove, said oxygen bottom-blowing stove and accessory have charging opening, exhanst gas outlet, melt outlet and are positioned at the oxygen entrance of its bottom; Side-blown reduction furnace, said side-blown reduction furnace have melt and add inlet, contain the zinc exhanst gas outlet, are formed on its lateral oxygen and injection of reducing agent inlet and slag notch, and wherein said melt adds inlet and links to each other with the melt outlet of said oxygen bottom-blowing stove; The liquid metal condensing surface, the zinc exhanst gas outlet that contains of said liquid metal condensing surface and said side-blown reduction furnace links to each other and is used for the zinc that condensation contains the zinc flue gas.
According to the Zinc concentrate smelting equipment of the embodiment of the invention, adopt oxygen bottom blowing stove and side-blown reduction furnace to smelt, need not carry out sintering to zinc ore concentrate; Therefore can realize cleaner production; Technical process is simplified, and initial cost and production cost reduce, and can realize energy-saving and emission-reduction significantly.
In addition, the Zinc concentrate smelting equipment according to the embodiment of the invention can have following additional technical characterictic:
Zinc concentrate smelting equipment according to the embodiment of the invention further comprises waste heat boiler, and the smoke inlet of said waste heat boiler links to each other with the exhanst gas outlet of said oxygen bottom-blowing stove to reclaim the waste heat in the flue gas.
Zinc concentrate smelting equipment according to the embodiment of the invention further comprises electric precipitator, and the smoke inlet of said electric precipitator links to each other in order to isolate the flue dust in the flue gas with the exhanst gas outlet of said waste heat boiler.
The flue dust outlet of said electric precipitator links to each other with the charging opening of said oxygen bottom-blowing stove.
According to some embodiments of the present invention, can contain lead in the said zinc ore concentrate, said side-blown reduction furnace also has lead outlet, and said liquid metal condensing surface is a lead-splash condenser.
Further comprise linking to each other according to the Zinc concentrate smelting equipment of the embodiment of the invention and be used for the plumbous zinc separator tank of separation of lead and zinc with lead-splash condenser.
Further comprise according to the Zinc concentrate smelting equipment of the embodiment of the invention and to be used for isolated crude zinc is carried out the purified rectifying furnace.
Zinc concentrate smelting equipment according to the embodiment of the invention further comprises washer; The inlet of said washer links to each other with the exhanst gas outlet of liquid metal condensing surface and washs with the flue gas that contains coal gas and blue powder of washing from the discharge of liquid metal condensing surface, and the gas exit of said washer links to each other with rectifying furnace and the blue powder outlet links to each other with the oxygen bottom-blowing stove so that with being delivered to the oxygen bottom-blowing stove after blue powder deposition, the filtration.
According to other embodiments of the invention, said liquid metal condensing surface is a zinc rain condensing surface.
Additional aspect of the present invention and advantage part in the following description provide, and part will become obviously from the following description, or recognize through practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage obviously with are easily understood becoming the description of embodiment from combining figs, wherein:
Fig. 1 is the connection synoptic diagram according to the zinc ore concentrate melting equipment of the embodiment of the invention;
Fig. 2 is the structural representation of the oxygen bottom-blowing stove of zinc ore concentrate melting equipment shown in Figure 1;
Fig. 3 is the structural representation of the side-blown reduction furnace of zinc ore concentrate melting equipment shown in Figure 1;
Fig. 4 is the operational flowchart according to the zinc ore concentrate melting equipment of the embodiment of the invention.
Embodiment
Describe embodiments of the invention in detail below in conjunction with accompanying drawing, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, only be used to explain the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, the orientation of indication such as term " side ", " bottom ", " top " or position relation are for the ease of describing the present invention, can not being interpreted as limitation of the present invention for based on orientation shown in the drawings or position relation.
Zinc ore concentrate melting equipment according to the embodiment of the invention at first is described with reference to the drawings below.
Fig. 1 is the connection synoptic diagram according to the zinc ore concentrate melting equipment of the embodiment of the invention.Fig. 2 is the structural representation of the oxygen bottom-blowing stove of zinc ore concentrate melting equipment shown in Figure 1.Fig. 3 is the structural representation of the side-blown reduction furnace of zinc ore concentrate melting equipment shown in Figure 1.Shown in Fig. 1～3, Zinc concentrate smelting equipment comprises: oxygen bottom-blowing stove 1, side-blown reduction furnace 2 and liquid metal condensing surface 3.
As shown in Figure 2, oxygen bottom-blowing stove 1 is made up of furnace shell and the refractory masses that is positioned at furnace shell and has the charging opening 11, the exhanst gas outlet 12 that is positioned at the top that are positioned at the top, is positioned at lateral melt outlet 13 and is positioned at the oxygen entrance 14 of bottom.
As shown in Figure 3; Side-blown reduction furnace 2 comprises furnace shell and the refractory masses that is positioned at furnace shell; And have and be positioned at lateral melt and add inlet 21, be positioned at containing zinc exhanst gas outlet 25, being formed on its lateral oxygen and injection of reducing agent inlet 23 and slag notch 24 of top, wherein melt adds inlet 21 and for example links to each other with the melt outlet 13 of oxygen bottom-blowing stove 1 through the chute (not shown).
Liquid metal condensing surface 3 contains with side-blown reduction furnace 2 that zinc exhanst gas outlet 25 links to each other so that condensation contains the zinc in the zinc flue gas.In one embodiment; For example when not leaded in the zinc ore concentrate or leaded when considerably less; Liquid metal condensing surface 3 can be called zinc rain condensing surface, promptly contains the zinc flue gas through zinc rain condenser condenses and obtains crude zinc, and need not capture the zinc in the flue gas with plumbous rain; This can understand for those of ordinary skill in the art easily, is not described in detail here.
Zinc ore concentrate and flux join in the oxygen bottom-blowing stove 1 from charging opening 11; For example in oxygen bottom-blowing stove 1, spray into oxygen or oxygen-rich air from the bottom of oxygen bottom-blowing stove 1 through oxygen rifle (not shown); Zinc ore concentrate is carried out melting to form melt; The melt that obtains then for example adds inlet 21 through chute and melt from melt outlet 13 and flows automatically in the side-blown reduction furnace 2; Side-blown reduction furnace 2 lateral oxygen and injection of reducing agent inlet 23 sprays into oxygen-rich air in the reduction furnace 2 that blows side and reductive agent (for example fine coal) reduces through being formed on, and is transported in the liquid metal condensing surface 3 from containing zinc exhanst gas outlet 25 with the form of steam thereby will melt intravital zinc.
Therefore,, need not zinc ore concentrate is carried out sintering, therefore pollute and lack according to the zinc ore concentrate melting equipment of the embodiment of the invention, good environmental protection, and cost is low with investment.
As shown in Figure 1, in certain embodiments, Zinc concentrate smelting equipment further comprises waste heat boiler 4.The smoke inlet of waste heat boiler 4 links to each other with the exhanst gas outlet 12 of oxygen bottom-blowing stove 1 to reclaim the waste heat in the flue gas, and the waste heat of recovery can be used for generating or other purposes.In the further embodiment of the present invention, Zinc concentrate smelting equipment further comprises electric precipitator 5.The smoke inlet of electric precipitator 5 links to each other to isolate the flue dust in the flue gas with the exhanst gas outlet of waste heat boiler 4.Preferably, after merging with electric precipitator 5 isolated flue dust, waste heat boiler 4 for example delivers to the charging opening 11 of oxygen bottom-blowing stove 1, so that isolated flue dust is returned in the oxygen bottom-blowing stove 1 through custody transfer device (not shown).Reduced dust treatment and environmental pollution, isolated the concentration height of the sulfur dioxide in flue gas of flue dust in addition, be beneficial to relieving haperacidity, the relieving haperacidity cost is low.
As shown in Figure 1; In some embodiments of the invention, Zinc concentrate smelting equipment further comprises washer 6, and washer 6 is used to wash the flue gas that contains coal gas and blue powder of discharging from liquid metal condensing surface 3 tops; Thereby obtain coal gas and blue powder; Coal gas can be used for crude zinc is carried out refining, and for example coal gas is transported to the burner of rectifying furnace 8 (describing below), and blue powder returns in the oxygen bottom-blowing stove through deposition and filtration.
Do not contain in the above-described zinc ore concentrate plumbous or leaded considerably less, more when plumbous according to optional embodiment when containing in the zinc ore concentrate, can also reclaim lead simultaneously according to the zinc ore concentrate melting equipment of the embodiment of the invention.Particularly, side-blown reduction furnace 2 has lead outlet 22, and melt is through reduction in side-blown reduction furnace 2; Obtain liquid lead bullion and leaded zinc fume, liquid lead bullion is discharged from the lead outlet 22 of side-blown reduction furnace 2, and leaded zinc fume gets into liquid metal condensing surface 3; Liquid metal condensing surface 3 can be called lead-splash condenser at this moment, is used for the zinc that liquid lead captures flue gas, goes out plumbous liquid and crude zinc through condensation separation then; Certainly; Also can contain a spot of lead in the isolated crude zinc, isolated plumbous liquid turns back to liquid metal condensing surface 3 and reuses, and this can understand for those of ordinary skill in the art easily.For separation of lead and zinc, may further include to link to each other according to the Zinc concentrate smelting equipment of the embodiment of the invention and be used for the plumbous zinc separator tank 7 of separation of lead and zinc with lead-splash condenser, as shown in Figure 1.Isolated crude zinc can utilize rectifying furnace 8 (as shown in Figure 4) to carry out refining, obtains smart zinc and lead bullion, can send electrorefining to obtain lead bullion with the lead bullion of discharging from side-blown reduction furnace 2 lead bullion that obtains.
Describe operating process in detail below in conjunction with accompanying drawing according to the Zinc concentrate smelting equipment of the embodiment of the invention.
In the following description, be that example is described to contain lead (being lead and zinc concentrate) in the zinc ore concentrate.
Fig. 4 is the operational flowchart according to the zinc ore concentrate melting equipment of the embodiment of the invention.As shown in Figure 4, at first, with in it, jetting oxygen so that zinc ore concentrate is carried out melting in zinc ore concentrate and the flux adding oxygen bottom-blowing stove and from the oxygen entrance of oxygen bottom-blowing furnace bottom.
Next, the melt that melting is obtained flows automatically in the side-blown reduction furnace and reduces from it, jet oxygen and reductive agent of its lateral oxygen and injection of reducing agent inlet.
The zinc flue gas that contains that produces in the slag discharge that produces in the side-blown reduction furnace and the reduction furnace that will blow side is transported in the lead-splash condenser with plumbous, the zinc fume of plumbous rain capture; Separation of lead zinc is to obtain crude zinc and plumbous liquid in plumbous zinc separator tank then, and plumbous liquid returns the lead-splash condenser internal recycle and uses.The lead bullion that the side-blown reduction furnace restores is discharged from lead outlet.
The crude zinc that obtains can carry out refining through rectifying furnace, obtains smart zinc and lead bullion, and lead bullion can carry out electrolysis with the lead bullion of discharging from the side-blown reduction furnace and obtain lead bullion.Zinc ore concentrate generally contains cadmium, and cadmium gets into crude zinc, through crude zinc rectifying, can in the cadmium tower, reclaim cadmium with cadmium ash form.
In fusion process, add a certain amount of flux, can reduce the fusing point of smelted product, thereby prolong the work-ing life of oxygen bottom-blowing stove furnace lining.
According to the embodiment of the invention, adopt oxygen bottom-blowing stove oxidizing semlting zinc ore concentrate, replace conventional ISP Imperial smelting process, thereby eliminated serious environmental issue.Because in sealing oxygen bottom-blowing stove preferably, accomplish the oxidising process of sulphur, so SO
2Concentration is high, can carry out negative-pressure operation, thereby guarantees SO
2Do not spill in the surrounding environment.In addition, cancel the broken step of back powder, do not had lead dust to fly upward, improved environmental quality significantly, can realize cleaner production.
In certain embodiments, in the side-blown reduction step, reductive agent can be the mixture of fine coal, perhaps a large amount of fine coal and a small amount of coke.When reductive agent was the mixture of a large amount of fine coal and a small amount of coke, coke can add from the charging opening (not shown) at side-blown reduction furnace top, perhaps adds inlet from melt and adds.In the side-blown reduction furnace, adopt fine coal to reduce, perhaps only use a small amount of coke without coke, compare with the retailoring of blast furnace technology of routine, reduced production cost.
For above-mentioned zinc ore concentrate melting equipment, do not adopt fuming furnace to handle the zinc in the slag, but adopt the side-blown reduction furnace to reduce, compare with fuming furnace, also be provided with refractory lining in the side-blown reduction furnace, thereby reduced the hear rate mistake.In addition; The zinc of fuming furnace reclaims with ZnO flue dust form, and in the side-blown reduction furnace, after ZnO is reduced to zinc fume; Do not reoxidize through secondary air and tertiary air; But directly high temperature entering liquid metal condensing surface reclaims zinc with metal form, thereby can improve the direct yield of zinc, reduces zinc metallurgy energy consumption and cost.
Adopt the oxygen-enriched side-blowing reduction furnace to carry out retailoring, compare, contain the zinc exhaust gas volumn and reduce significantly with the retailoring of blast furnace technology of routine; Contain that zinc fume concentration significantly improves in the zinc flue gas; Thereby can adopt lead-splash condenser, and when handling lead-free single zinc ore concentrate, also available zinc rain condensing surface.Thereby the raising condensation efficiency reduces the growing amount of scum silica frost and blue powder, further improves the recovery of zinc.Simultaneously, owing to contain in the zinc flue gas nonnitrogenous gas or only contain small amount of nitrogen, therefore contain flammable composition CO and H in the zinc flue gas
2Content higher relatively, be high heating value gas, be convenient to utilize, can effectively improve the heat energy utilization rate, thereby reduce the product unit consumption of energy.As shown in Figure 4, washing obtains coal gas and blue powder to the flue gas that produces in the liquid metal condensing surface through washer, and blue powder returns the oxygen bottom-blowing stove, and coal gas is transported to the rectifying furnace utilization, has further improved efficiency of cycling economy.
As shown in Figure 4; According to some embodiments of the present invention; The operating process of this Zinc concentrate smelting equipment further comprises the step of utilizing waste heat boiler to reclaim the heat in the flue gas that produces in the oxygen bottom-blowing stove, and the flue gas that wherein reclaims behind the heat comprises a large amount of sulfurous gas and a small amount of flue dust.Flue gas behind the recovery heat is cooled to below 400 ℃ through behind the waste heat boiler, utilizes electric precipitator that this flue gas is carried out dedusting then, to obtain the flue gas of flue dust and purification.The flue dust that boiler behind isolated flue dust and the recovery heat is produced adds in the oxygen bottom-blowing stove with zinc ore concentrate and flux.Can utilize flue gas after being purified system sulfuric acid or liquid sulfur dioxide.For containing arsenic, zinc ore concentrate that mercury is high, then can behind electric precipitator, add spray condenser and cold electric precipitator or sack cleaner and reclaim AS
2O
3Flue dust, and mercury removal device recovery MERCURY METAL 99.99(500+500FLASKS) is set before relieving haperacidity.Like this, can further reduce environmental pollution, improve the comprehensive utilization degree of resource.
Compare with the ISP technology of routine, cancelled big batch facilities such as agglomerate insulation storehouse, coke preheater, air blast preheating oven according to the zinc ore concentrate melting equipment of the embodiment of the invention, simplified technical process, thereby saved initial cost, further reduce production costs.
In sum, according to the Zinc concentrate smelting equipment of the embodiment of the invention, not only can realize cleaner production, and simplify technical process, thereby reduce initial cost and production cost, especially can realize energy-saving and emission-reduction significantly.
In the description of this specification sheets, the description of reference term " embodiment ", " optional embodiment ", " some embodiment " or " other embodiment " etc. means the concrete characteristic, structure, material or the characteristics that combine this embodiment or example to describe and is contained at least one embodiment of the present invention or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete characteristic, structure, material or the characteristics of description can combine with suitable manner in any one or more embodiment or example.
Although illustrated and described embodiments of the invention; Those having ordinary skill in the art will appreciate that: under the situation that does not break away from principle of the present invention and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited claim and equivalent thereof.
Claims (9)
1. a Zinc concentrate smelting equipment is characterized in that, comprising:
Oxygen bottom-blowing stove, said oxygen bottom-blowing stove and accessory have charging opening, exhanst gas outlet, melt outlet and are positioned at the oxygen entrance of its bottom;
Side-blown reduction furnace, said side-blown reduction furnace have melt and add inlet, contain the zinc exhanst gas outlet, are formed on its lateral oxygen and injection of reducing agent inlet and slag notch, and wherein said melt adds inlet and links to each other with the melt outlet of said oxygen bottom-blowing stove;
The liquid metal condensing surface, the zinc exhanst gas outlet that contains of said liquid metal condensing surface and said side-blown reduction furnace links to each other and is used for the zinc that condensation contains the zinc flue gas.
2. Zinc concentrate smelting equipment according to claim 1 is characterized in that, further comprises:
Waste heat boiler, the smoke inlet of said waste heat boiler link to each other with the exhanst gas outlet of said oxygen bottom-blowing stove to reclaim the waste heat in the flue gas.
3. Zinc concentrate smelting equipment according to claim 2 is characterized in that, further comprises: electric precipitator, the smoke inlet of said electric precipitator links to each other in order to isolate the flue dust in the flue gas with the exhanst gas outlet of said waste heat boiler.
4. Zinc concentrate smelting equipment according to claim 3 is characterized in that, the flue dust outlet of said electric precipitator links to each other with the charging opening of said oxygen bottom-blowing stove.
5. according to each described Zinc concentrate smelting equipment among the claim 1-4, contain lead in the wherein said zinc ore concentrate, it is characterized in that, said side-blown reduction furnace also has lead outlet, and said liquid metal condensing surface is a lead-splash condenser.
6. Zinc concentrate smelting equipment according to claim 5 is characterized in that, further comprising links to each other with lead-splash condenser is used for the plumbous zinc separator tank of separation of lead and zinc.
7. Zinc concentrate smelting equipment according to claim 6 is characterized in that, further comprises being used for isolated crude zinc is carried out the purified rectifying furnace.
8. Zinc concentrate smelting equipment according to claim 6; It is characterized in that; Further comprise washer; The inlet of said washer links to each other with the exhanst gas outlet of liquid metal condensing surface and washs with the flue gas that contains coal gas and blue powder of washing from the discharge of liquid metal condensing surface, and the gas exit of said washer links to each other with rectifying furnace and the blue powder outlet links to each other with the oxygen bottom-blowing stove so that with being delivered to the oxygen bottom-blowing stove after blue powder deposition, the filtration.
9. Zinc concentrate smelting equipment according to claim 1 is characterized in that, said liquid metal condensing surface is a zinc rain condensing surface.
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| CN103205581A (en) * | 2013-03-11 | 2013-07-17 | 中国恩菲工程技术有限公司 | Bottom blowing smelting electrothermal reduction lead and zinc smelting device |
| CN103334008B (en) * | 2013-05-29 | 2015-08-19 | 中国瑞林工程技术有限公司 | A kind of smelting process for sour mud process |
| CN103451446A (en) * | 2013-09-10 | 2013-12-18 | 中国恩菲工程技术有限公司 | Smelting side-blowing reduction lead-zinc smelting device |
| CN105688612B (en) * | 2016-01-21 | 2017-12-01 | 云南科威液态金属谷研发有限公司 | A kind of liquid metal dehumidifier |
| CN105907988B (en) * | 2016-06-17 | 2019-05-07 | 中国恩菲工程技术有限公司 | The equipment smelted for Pb-Zn deposits |
| CN106119553A (en) * | 2016-08-11 | 2016-11-16 | 中国恩菲工程技术有限公司 | The processing equipment of zinc leaching residue and processing method |
| CN106244809B (en) * | 2016-08-11 | 2018-08-24 | 中国恩菲工程技术有限公司 | The processing method of zinc leaching residue |
| CN107326186A (en) * | 2017-07-28 | 2017-11-07 | 江苏省冶金设计院有限公司 | A kind of system and method for handling utilising zinc containing waste residue |
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| CN201056586Y (en) * | 2007-06-18 | 2008-05-07 | 李大忠 | Double-body and double-tower resistor electric arc zinc metallurgy stove |
| CN101492774B (en) * | 2008-01-21 | 2010-04-14 | 中国恩菲工程技术有限公司 | Zinc metallurgy apparatus and process |
| CN201793692U (en) * | 2010-07-20 | 2011-04-13 | 中国恩菲工程技术有限公司 | Zinc concentrate smelting device |
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