CN1243113C - Zinc leaching-out slag treating process with vertical retort zinc refining residue as fuel - Google Patents
Zinc leaching-out slag treating process with vertical retort zinc refining residue as fuel Download PDFInfo
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- CN1243113C CN1243113C CNB2004100206956A CN200410020695A CN1243113C CN 1243113 C CN1243113 C CN 1243113C CN B2004100206956 A CNB2004100206956 A CN B2004100206956A CN 200410020695 A CN200410020695 A CN 200410020695A CN 1243113 C CN1243113 C CN 1243113C
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Abstract
The present invention relates to a technique for treating zinc leaching residues by taking zinc vertical retorting residues as fuels. The used furnace material contains zinc leaching residues, zinc vertical retorting residues and quartz stone. 18055.6kg of zinc leaching residues, 22638.9kg of zinc vertical retorting residues and 1305.6kg of quartz stone are continuously added in a smelting furnace per hour, and simultaneously dust coal is continuously sprayed into the smelting furnace by a spray lance. The quantity of the sprayed dust coal is 1520kg per hour, oxygen-enriched air is added into the smelting furnace through the spray lance, the reaction temperature in the smelting furnace is controlled within 1300 DEG C, and thus, zinc and lead oxidizing smoke dust and liquid slag are generated. The generated liquid slag continuously flows into a reducing furnace. The material react at the temperature of 1350 DEG C, and the generated zinc and lead oxidizing smoke dust and the slag are exhausted from an overflow weir which is arranged on the other side of the reduction furnace, are quenched by high-pressure water, and are manufactured to raw materials for producing building materials. The present invention has the advantage that the present invention is easy to operate; the carbon in the zinc vertical retorting residues can be sufficiently utilized, and thus, energy sources can be saved; the zinc and lead smoke dust is conveniently recovered, and the recovery rate is high; the harmless waste slag output from the smelting furnace can be used for manufacturing building materials of cement, etc.
Description
(1) technical field
The present invention relates to non-ferrous metal metallurgy comprehensive reutilization technology, relating in particular to and adopting the processing of top-blown bath smelting technique is the zinc leaching residue treatment process of fuel with the zinc vertical retorting residue.Belong to non-ferrous metal metallurgy
Technical field.
(2) technical background
Zinc vertical retorting technology is one of at present domestic main smelting process, and its production scale is very important.But the zinc vertical retorting residue carbon containing is up to more than 30%, and contains multiple valuable metals such as lead, zinc, silver, copper, all well do not recycled.Present stage has had only Zinc Factory of Huludao's a part of zinc vertical retorting residue that adopted the cyclone furnace smelting technical finesse, and most of zinc vertical retorting enterprise also rests on simply stores up the level of abandoning.With regard to the zinc vertical retorting residue technology is handled in the cyclone furnace smelting of existing producer, though reached level preferably, but also exist certain drawback, as: feedstock production complexity in the technical process, Production Flow Chart is long, product flue dust intractability again is big, and by-product steam is used to generate electricity restricted more, investment in fixed assets height or the like.
Can think that the zinc vertical retorting residue technology is handled in cyclone furnace smelting, also is not really perfect zinc vertical retorting residue treatment technology (seeing accompanying drawing 2).Therefore, the scientific and technical personnel of some producers just are being devoted to research zinc vertical retorting residue are being applied in other metallurgical technology as fuel, the comprehensive simultaneously valuable metal that reclaims in the zinc vertical retorting residue, rather than merely study the technology of zinc vertical retorting residue individual curing.
Existing zinc leaching residue treatment process (seeing accompanying drawing 3) exists the shortcoming of aspects such as processing charges height, valuable metal comprehensive recovery be low.Reducing aspect the leached mud processing takes, each enterprise generally is placed on attention on the life-span that prolongs the Rotary Kiln liner tile, and has obtained gratifying achievement, and the life-span of Rotary Kiln liner tile was brought up to more than 220 days by about 90 days.
But in improving leached mud, aspect the recovery rate of valuable metals, be subjected to the restriction of Rotary Kiln production technique itself, but do not have big progress.Particularly the recovery levels of Ag, In, Ge, Ga etc. is all also very low.
In addition, the coke powder that Rotary Kiln is used, to the specification of quality harshness, consumption level is also higher.
Domestic certain enterprise has increased the flow process of silver-colored flotation in conventional two sections filtration operations that leach operation, attempts before Rotary Kiln is handled silver to be reclaimed in advance, obtained certain effect, but effect is not remarkable.The enterprise that also has has been explored in cyclone furnace smelting technology, leached mud and zinc vertical retorting residue is added in the cyclone furnaces according to a certain ratio handle, and expectation reduces the energy consumption level that slag is handled.From test effect, the purpose of not only cut down the consumption of energy (mainly being to reduce coke powder consumption) fails to realize that the recovery level of zinc is not high yet to have only about 80%, and test is also unsuccessful.
(3) summary of the invention
The purpose of this invention is to provide a kind of is fuel with the zinc vertical retorting residue, adopt top blow smelting technical finesse zinc leaching residue, carbon in the zinc vertical retorting residue can be made full use of as the metallurgical reaction thermal source, a kind of novel process of the various valuable metals in zinc leaching residue and the zinc vertical retorting residue can be comprehensively reclaimed again.
The per-cent that relates in this specification sheets all is weight percentage.
The technical solution used in the present invention is:
With the zinc vertical retorting residue is the zinc leaching residue treatment process of fuel, comprises two top winding-up bath smelting furnaces, furnace charge.Furnace charge comprises zinc leaching residue, zinc vertical retorting residue, quartzite flux.With the zinc vertical retorting residue is fuel, adopts the top-blown bath smelting technique to handle the zinc leaching residue new technology, and its technology is as follows: the twin furnace system that two tops of this process using winding-up bath smelting furnace is formed.Zinc leaching residue, zinc vertical retorting residue and quartzite flux through mix pinch or granulate after, by the belt conveyor system of routine in charging opening adds smelting furnace (i.e. first top winding-up bath smelting furnace), per hour adding the zinc leaching residue amount continuously in smelting furnace is that 8300～19000kg, zinc vertical retorting residue amount are that 10000～24600kg, quartzite amount are 583.3～1350kg, in stove, spray into fine coal continuously by spray gun simultaneously, the coal dust amount that sprays into is 850～1520kg per hour, to assist temperature control in the stove.By the oxygen-rich air of spray gun adding 40%, stove inner control oxidizing atmosphere, the reaction in furnace temperature is controlled at 1280～1320 ℃, generates zinc, plumbous oxidation flue dust and liquid slag; The zinc of being produced, plumbous oxidation flue dust are through bag collection, as the raw material of further recovery zinc, lead.The liquid slag that is generated flows into the inlet weir of reduction furnace (i.e. second top winding-up bath smelting furnace) continuously by the overflow weir of smelting furnace one side, continue the retailoring of zinc, lead through reduction furnace, material in the reduction furnace is 1320～1380 ℃ of reactions down, the zinc that is generated, plumbous oxidation flue dust are collected through cloth bag, raw material as further recovery zinc, lead, slag is continuously discharged by the overflow weir of reduction furnace opposite side, is used as material of construction such as system cement after the high pressure shrend.The flue gas that smelting furnace produced is produced sulfuric acid behind high-temperature flue gas treatment system cooling and purifying.
Add a certain amount of zinc vertical retorting residue in the above-mentioned reduction furnace and make fuel and reductive agent, blast the evaporation rate that air in certain amount improves zinc simultaneously.
Fine coal in the above-mentioned adding smelting furnace can substitute with Sweet natural gas or coal gas.
Two above-mentioned top winding-up bath smelting furnaces all adopt the soft steel furnace shell, the high-quality chrome-magnesite firebrick of liner, inlay the water-cooled copper water jacket in the brick, furnace roof has four openings, a raw material mouth, a spray gun inserts mouth, an observation/thief hole and a standby burner inlet.
Above-mentioned smelting furnace (first top winding-up bath smelting furnace), when zinc leaching residue treatment capacity 130,000 t/a, specification is Φ 5.0m, when zinc leaching residue treatment capacity 60,000 t/a, specification is Φ 3.4m, and temperature is controlled at 1280 ℃～1320 ℃ in the stove, and there is an overflow weir of specializing in deslagging the stove side.
Above-mentioned reduction furnace (second top winding-up bath smelting furnace), when zinc leaching residue treatment capacity 130,000 t/a, specification is Φ 3.9m, when zinc leaching residue treatment capacity 60,000 t/a, specification is Φ 2.8m, temperature is controlled at 1320 ℃～1380 ℃ in the stove, and the stove side has one to specialize in the inlet weir that smelting slag flows into, and opposite side has the discharge weir of a deslagging.
Above-mentioned zinc leaching residue i.e. the leached mud of conventional two sections leachings, contain Zn and be 18～24%, Pb for＜6%, Cu is 0.5～0.9%, Fe is 20～30%, S is 5～7%, SiO
2Be 8～12%, CaO is 0.9%, Ag is 120～180g/t.
Above-mentioned zinc vertical retorting residue contains Zn and is 1～6%, Pb is 0.4～1.0%, Cu is 0.6～0.9%, Fe is 18～22%, S is 3.0～4.0%, SiO
2Be 10～12%, CaO is 0.3～0.6%.
The above-mentioned flue dust and the index of slag are as follows:
Table 1 product is formed overview (%)
| A perpendicular jar slag contains zinc 1% | A perpendicular jar slag contains zinc 2% | A perpendicular jar slag contains zinc 6% | ||||
| ％ | Flue dust | Slag | Flue dust | Slag | Flue dust | Slag |
| Zn | 63.0 | 2.0 | 63.6 | 2.0 | 66.0 | 2.0 |
| Pb | 13.3 | 0.2 | 12.8 | 0.2 | 10.9 | 0.2 |
| Cu | 0.0 | 1.1 | 0.0 | 1.1 | 0.0 | 1.1 |
| Fe | 1.6 | 37.8 | 1.6 | 38.1 | 1.4 | 39.9 |
| S | 1.1 | 0.3 | 1.1 | 0.3 | 1.0 | 0.3 |
| SiO 2 | 1.2 | 25.2 | 1.1 | 25.5 | 1.0 | 26.7 |
| CaO | 0.2 | 4.6 | 0.2 | 4.7 | 0.2 | 5.0 |
Above-mentioned slag that reduction furnace produces contains zinc≤2%, plumbous≤0.2%.
Zinc in the above-mentioned zinc leaching residue, lead are enriched in the flue dust, and the rate of recovery that zinc, lead are gone into flue dust is 96%
In above-mentioned fuel (fine coal, Sweet natural gas, coal gas etc.), air and oxygen are jetted bath smelting furnace by lance ejection to the top, spray gun mechanize elevator that moves through of position in every stove realizes that spray gun and air, oxygen and fuel system are by hose connection flexibly.
The present invention handles zinc leaching residue with existing Rotary Kiln and has compared following advantage:
1, the top winding-up bath smelting furnace atmosphere oxygen control that can spray into by the add-on and the spray gun of zinc vertical retorting residue, easy handling.
2, can make full use of carbon in the zinc vertical retorting residue, save energy.
3, plumbous, Zn dust is convenient to reclaim rate of recovery height.
4, the harmless waste of smelting furnace output can be used for making material of construction such as cement.
(4) description of drawings
Fig. 1 handles zinc vertical retorting residue feedstock production schema for cyclone furnaces.
Fig. 2 handles the zinc vertical retorting residue process flow sheet for cyclone furnaces.
Fig. 3 handles the zinc leaching residue process flow sheet for Rotary Kiln.
Fig. 4 for of the present invention be the zinc leaching residue processing technological flow figure of fuel with the zinc vertical retorting residue.
(5) embodiment
With the zinc vertical retorting residue is the zinc leaching residue treatment process of fuel, comprise two top winding-up bath smelting furnaces (is reduction furnace for smelting furnace and another), furnace charge, furnace charge comprises zinc leaching residue, zinc vertical retorting residue, quartzite flux and fuel (comprising fine coal, Sweet natural gas, coal gas etc.) again.
Embodiment one
The employing zinc vertical retorting residue is that the zinc leaching residue processing technological flow of fuel is seen accompanying drawing 4.
The composition of zinc leaching residue and zinc vertical retorting residue is:
Table 3 zinc leaching residue composition (%)
| Element | Zn | Pb | Cu | Fe | S | SiO 2 | CaO | Ag(g/t) |
| Composition | 18-24 | ＜6 | 0.5-0.9 | 20-30 | 5-7 | 8-12 | 0.9 | 120-180 |
Table 4 zinc vertical retorting residue composition (%)
| Zn | Pb | Cu | Fe | C | S | SiO 2 | CaO | Calorific value (Mj/kg) |
| 1 | 0.4-1.0 | 0.6-0.9 | 18-22 | 30-36 | 3-4 | 10-12 | 0.3-0.6 | 10-15 |
1, batching, zinc leaching residue, zinc vertical retorting residue and quartzite flux are earlier through feed bin, weighing device, mix and pinch or granulate again.Mixing the raw material belt conveyor of pinching material use routine adds in the smelting furnace by the stove charging opening.The stove charging opening is sealed effectively to prevent air admission.Going into furnace charge will meet some requirements, and pinches that material is loose, granularity is not too thin etc. as mixing.
The implementation case is handled zinc leaching residue 18055.6kg/h, adds zinc vertical retorting residue 22638.9kg/h, quartzite 1305.6kg/h, fine coal 1520kg/h.
2, melting, because that the zinc leaching residue of conventional two sections leachings contains zinc relatively is higher, so adopt the twin furnace system of two tops winding-up bath smelting furnaces compositions, first stove is oxidizing atmosphere, the stove specification is Φ 5.0m.Zinc leaching residue adds in the stove with raw material mode continuously, the zinc leaching residue add-on is 18055.6kg/h, zinc vertical retorting residue adds in the stove as main fuel with raw material mode continuously, add-on is 22638.9kg/h, coal dust adds the temperature that is used to regulate in the stove in the stove as auxiliary fuel by spray gun, and add-on is 1520kg/h.In order to form ideal slag type, add a certain amount of quartzite flux, add-on is 1305.6kg/h, in order to reduce the consumption of fuel, by the oxygen-rich air of spray gun adding 40%.Temperature is controlled at 1300 ℃ in the stove, the molten bath forms melt in the stove, furnace charge and spray gun spray into 40% oxygen-rich air and fuel generation violent stirring and mixing, react fully and carry out, output contains the oxidation flue dust and the slag of zinc, lead continuously, zinc, plumbous oxidation dirt gather dust through cooling and further reclaim zinc, lead, and the slag of smelting furnace output is discharged continuously by an overflow weir, and is transported to reduction furnace.Second stove is reducing atmosphere, and the stove specification is Φ 3.9m.Reduction furnace is handled is the liquid slag that continuously flows into from smelting furnace.Temperature is controlled at 1350 ℃ in the reduction furnace stove, in reduction furnace, continue to take place zinc and plumbous fuming, discharge flue gas and the slag that contains zinc, plumbous oxidation dirt continuously, zinc, plumbous oxidation dirt gather dust through cooling and further reclaim zinc, lead, waste is discharged from the overflow weir of reduction furnace opposite side continuously, is used to make material of construction such as cement after the high pressure shrend as harmless slag.
Slag contains zinc, lead level in order to reach preferably, adds a certain amount of zinc vertical retorting residue in the reduction furnace and acts as a fuel and reductive agent, adds air in certain amount to improve the evaporation rate of zinc by spray gun simultaneously.
3, flue gas is handled, zinc in zinc leaching residue and the zinc vertical retorting residue, plumbous volatilization enter in the flue gas, gas from top winding-up bath smelting furnace system output, cooling and purification in a high-temperature flue gas treatment system, zinc and lead are enriched in the flue dust, fume amount is 6319.4kg/h, and flue dust contains zinc 63%, lead 13.3%, can further reclaim zinc, lead.Use fume treatment auxiliary conventional, easy to perform, flue gas by a sulfur curable treatment process, makes the curing slag satisfy the requirement that environmental protection is stacked waste through after purifying.
Embodiment two
Embodiment two with difference of embodiment is: zinc vertical retorting residue contains zinc 2%, adds zinc vertical retorting residue 23527.8kg/h, quartzite flux 1291.7kg/h, fine coal 1395.8kg/h.The fume amount of output is 6625kg/h, and the quantity of slag is 25263.8kg/h.Other is identical.
Embodiment three
Embodiment three with difference of embodiment is: zinc vertical retorting residue contains zinc 6%, adds zinc vertical retorting residue 24583.3kg/h, quartzite flux 1291.7kg/h, and fine coal 1472.2kg/h, the fume amount of output are 7833.3kg/h, the quantity of slag is 24750kg/h.Other is identical.
Embodiment four
Embodiment four with difference of embodiment is: zinc vertical retorting residue contains zinc 1%, and zinc leaching residue treatment capacity 8333.3kg/h adds zinc vertical retorting residue 10475kg/h, quartzite flux 597.2kg/h, fine coal 909.7kg/h.The specification of smelting furnace is Φ 3.4m, and the specification of reduction furnace is Φ 2.8m.The fume amount of output is 2916.7kg/h, and the quantity of slag is 11583.3kg/h.Other is identical.
Embodiment five
Embodiment five with difference of embodiment is: zinc vertical retorting residue contains zinc 2%, and zinc leaching residue treatment capacity 8333.3kg/h adds zinc vertical retorting residue 10888.9kg/h, quartzite flux 597.2kg/h, fine coal 854.1kg/h.The specification of smelting furnace is Φ 3.4m, and the specification of reduction furnace is Φ 2.8m.The fume amount of output is 3055.6kg/h, and the quantity of slag is 11694.4kg/h.Other is identical.
Embodiment six
Embodiment six with difference of embodiment is: zinc vertical retorting residue contains zinc 6%, and zinc leaching residue treatment capacity 8333.3kg/h adds zinc vertical retorting residue 11388.9kg/h, quartzite flux 583.3kg/h, fine coal 888.9kg/h.The specification of smelting furnace is Φ 3.4m, and the specification of reduction furnace is Φ 2.8m.The fume amount of output is 3611.1kg/h, and the quantity of slag is 11458.3kg/h.Other is identical.
Claims (9)
1, with the zinc vertical retorting residue be the zinc leaching residue treatment process of fuel, employed specific equipment comprises two top winding-up bath smelting furnaces; Make smelting furnace usefulness for one in two top winding-up bath smeltings, another is made reduction furnace and uses, it is characterized in that employed furnace charge comprises zinc leaching residue, zinc vertical retorting residue and quartzite, per hour adding the zinc leaching residue amount continuously in smelting furnace is 8300～19000kg, zinc vertical retorting residue 10000～24600kg, quartzite 583.3～1350kg, in stove, spray into fine coal continuously by spray gun simultaneously, the coal dust amount that sprays into is 850～1520kg per hour, and by spray gun adding oxygen-rich air, the reaction in furnace temperature is controlled at 1280～1320 ℃, generates zinc, plumbous oxidation flue dust and liquid slag; The raw material of zinc lead is reclaimed in the conduct after cooling is gathered dust of the zinc of being produced, plumbous oxidation flue dust; The liquid slag that is generated flows into the inlet weir of reduction furnace continuously by the overflow weir of smelting furnace one side, and the material in the reduction furnace is 1320～1380 ℃ of reactions down, and the zinc that is generated, plumbous oxidation flue dust are made and reclaimed zinc, plumbous raw material after cooling is gathered dust; Slag is discharged by the overflow weir of reduction furnace opposite side, after the high pressure shrend, makes the raw material of producing material of construction.
2, according to claim 1 is the zinc leaching residue treatment process of fuel with the zinc vertical retorting residue, it is characterized in that temperature is controlled at 1300 ℃ in the described smelting furnace, and temperature is controlled at 1350 ℃ in the described reduction furnace stove; Described oxygen-rich air is 40% oxygen-rich air.
3, according to claim 1 is the zinc leaching residue treatment process of fuel with the zinc vertical retorting residue, it is characterized in that described zinc leaching residue, be two sections conventional leached muds, contain Zn and be 18～24%, Pb＜6%, Cu are 0.5～0.9%, Fe is 20～30%, S is 5～7%, SiO
2Be 8～12%, CaO is 0.9%, Ag is 120～180g/t; Described zinc vertical retorting residue, the residue of discharging when being zinc vertical retorting contains Zn and is 1～6%, Pb is 0.4～1.0%, Cu is 0.6～0.9%, Fe is 18～22%, S is 3～4%, SiO
2Be 10～12%, CaO is 0.3～0.6%, C is 30～36%, calorific value is 10～15Mj/kg, above-mentioned per-cent is weight percentage; Described smelting furnace, when the zinc leaching residue treatment capacity was 19000kg/h, specification was Φ 5.0m, when the zinc leaching residue treatment capacity was 8300kg/h, specification was Φ 3.4m; Described reduction furnace, when the zinc leaching residue treatment capacity was 19000kg/h, specification was Φ 3.9m, when the zinc leaching residue treatment capacity was 8300kg/h, specification was Φ 2.8m.
4, according to claim 1 or 3 described be the zinc leaching residue treatment process of fuel with the zinc vertical retorting residue, it is characterized in that zinc vertical retorting residue contains zinc 1% by weight percentage, the zinc vertical retorting residue add-on is 22638.9kg/h, the coal dust add-on is 1520kg/h, and the quartzite add-on is 1305.6kg/h.
5, according to claim 1 or 3 described be the zinc leaching residue treatment process of fuel with the zinc vertical retorting residue, it is characterized in that zinc vertical retorting residue contains zinc 2% by weight percentage, add zinc vertical retorting residue 23527.8kg/h, quartzite flux 1291.7kg/h, fine coal 1395.8kg/h.
6, according to claim 1 or 3 described be the zinc leaching residue treatment process of fuel with the zinc vertical retorting residue, it is characterized in that zinc vertical retorting residue contains zinc 6% by weight percentage, add zinc vertical retorting residue 24583.3kg/h, quartzite flux 1291.7kg/h, fine coal 1472.2kg/h.
7, according to claim 1 is the zinc leaching residue treatment process of fuel with the zinc vertical retorting residue, it is characterized in that zinc vertical retorting residue contains zinc 1% by weight percentage, zinc leaching residue treatment capacity 8333.3kg/h, add zinc vertical retorting residue 10475kg/h, quartzite flux 597.2kg/h, fine coal 909.7kg/h, the specification of smelting furnace is Φ 3.4m, the specification of reduction furnace is Φ 2.8m.
8, according to claim 1 is the zinc leaching residue treatment process of fuel with the zinc vertical retorting residue, it is characterized in that zinc vertical retorting residue contains zinc 2% by weight percentage, zinc leaching residue treatment capacity 8333.3kg/h, add zinc vertical retorting residue 10888.9kg/h, quartzite flux 597.2kg/h, fine coal 854.1kg/h, the specification of smelting furnace is Φ 3.4m, the specification of reduction furnace is Φ 2.8m.
9, according to claim 1 is the zinc leaching residue treatment process of fuel with the zinc vertical retorting residue, it is characterized in that zinc vertical retorting residue contains zinc 6% by weight percentage, zinc leaching residue treatment capacity 8333.3kg/h, add zinc vertical retorting residue 11388.9kg/h, quartzite flux 583.3kg/h, fine coal 888.9kg/h, the specification of smelting furnace is Φ 3.4m, the specification of reduction furnace is Φ 2.8m.
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101985695B (en) * | 2010-11-22 | 2012-09-12 | 云南祥云飞龙有色金属股份有限公司 | Method for processing zinc leaching residues at high proportion by using oxygen bottom blown furnace |
| CN102141244A (en) * | 2010-11-26 | 2011-08-03 | 张家港华汇特种玻璃有限公司 | Powder tube of spray gun |
| CN102321806B (en) * | 2011-09-28 | 2016-03-16 | 长沙有色冶金设计研究院有限公司 | A kind of smelting process of processing zinc leaching residue by oxygen-enriched side-blowing furnace |
| CN102399995B (en) * | 2011-11-30 | 2014-04-16 | 云南祥云飞龙再生科技股份有限公司 | Method for extracting lead-zinc oxide by utilizing zincilate volatilization kiln |
| CN104894397A (en) * | 2015-06-30 | 2015-09-09 | 中国恩菲工程技术有限公司 | Method for adopting oxygen-enriched vortex bath smelting furnace to treat antimony-containing material |
| CN108842070A (en) * | 2018-07-16 | 2018-11-20 | 汉源四环锌锗科技有限公司 | A kind of zinc abstraction Rotary Kiln starting technique |
| CN110846511B (en) * | 2019-11-18 | 2021-08-17 | 济源豫光有色冶金设计研究院有限公司 | Method for co-processing zinc leaching residues and gypsum residues |
| CN111286628A (en) * | 2020-04-21 | 2020-06-16 | 葫芦岛宏跃北方铜业有限责任公司 | Comprehensive recovery method using zinc volatilization kiln slag as fuel |
| CN112080645A (en) * | 2020-10-10 | 2020-12-15 | 中国恩菲工程技术有限公司 | Method and device for recovering zinc oxide and iron from zinc-containing soot |
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