CN100567526C - The method and system of heterogeneity dust separation in the stainless steel smelting process - Google Patents
The method and system of heterogeneity dust separation in the stainless steel smelting process Download PDFInfo
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- CN100567526C CN100567526C CNB2008100311166A CN200810031116A CN100567526C CN 100567526 C CN100567526 C CN 100567526C CN B2008100311166 A CNB2008100311166 A CN B2008100311166A CN 200810031116 A CN200810031116 A CN 200810031116A CN 100567526 C CN100567526 C CN 100567526C
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Abstract
The invention discloses the method for heterogeneity dust separation in a kind of stainless steel smelting process, it is characterized in that, may further comprise the steps: 1) first step gravitational dust collection goes out kiln gas with stainless steel smelting and introduces gravity settling chamber, parting furnace slag dust under the condition of negative pressure or vacuum; 2) second stage dedusting, under the condition of negative pressure or vacuum, the flue gas after will handling through first step gravitational dust collection is introduced tornado dust collector, separating nickel chromium powder dirt; 3) will enter third stage bag-type dust again through after the dust separating smoke combustion in the second stage, catch plumbous zinc powder dirt.The invention also discloses a kind of dust separation system based on heterogeneity dust separation method in the stainless steel smelting process.Adopt this patent can realize effective separation of heterogeneity dust,, help environment protection, reduce and smelt production cost, obtain favorable economic benefit with less input so that fully recycle metal in the dust.
Description
Technical field
The invention belongs to metallurgical technology field, relate to a kind of method and system of in stainless steel smelting process, separating the heterogeneity dust.
Background technology
Produce a large amount of smelting dusts in the stainless steel smelting process, steel-making dust be treated as one of global problem that steel industry faces.Contain various heavy such as nickel, chromium, cadmium, lead, zinc in the dust, wherein heavy metal was easily leached by rainwater or underground water when the dust landfill was thrown aside, and can cause disadvantageous effect to environment.China for the processing of stainless steel dust, just simply is stacked at dust among the environment at present, easily pollutes, and contains the metals resources of China's scarcities such as a large amount of nickel, chromium in the dirt.Central South University goes out the direct recovery technology of stainless steel smelting dust by a large amount of research and development; be about to return steel melting furnace behind dust and the reductive agent mixing granulation; utilize hot conditions in the steel melting furnace that valuable metals such as the nickel in the dust, chromium, iron are reverted back and close among the mother liquor of stainless steel, this technology is not only protected environment metals resources in the recyclable dust simultaneously.But implement the direct recovery technology of stainless steel smelting dust, must isolate the dust of heterogeneity, only dust nickelic, chromium content is directly reduced recovery, can avoid the accumulation that in system, circulates such as lead, zinc, silicon, calcium, magnesium to cause the steel-making working of a furnace to worsen and influence ordinary production like this.
In the prior art, after flue cools, adopt sack cleaner to capture dust in flue gas again the stainless steel smelting flue gas, contain multiple thing phase compositions such as slag, molten steel and plumbous zinc in the dust of acquisition, cause difficulty for further metal recovery.If transformation by dust-removal system and control flue gas treatment condition are separated the heterogeneity dust in smelting process, further recovery and processing that can convenient dust.And also lack isolation technique in the prior art at heterogeneity dust in the stainless steel smelting flue gas.
Summary of the invention
Technical problem to be solved by this invention is, the method and system of heterogeneity dust separation in a kind of stainless steel smelting process are provided, utilize that film drips, the difference of the vapour pressure of the difference of liquid droplets physics-chem characteristic and lead, zinc and oxide compound thereof, obtain slag dust, nickel chromium triangle dust and plumbous zinc powder dirt, thereby reach the purpose of heterogeneity dust separation.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be:
The method of heterogeneity dust separation is characterized in that in a kind of stainless steel smelting process, may further comprise the steps: 1) first step gravitational dust collection, preventing under the condition of air admission, and stainless steel smelting is gone out kiln gas introduce gravity settling chamber, parting furnace slag dust; The temperature that flue gas enters gravity settling chamber is 1000～1400 ℃;
2) second stage dedusting is preventing under the condition of air admission, and the flue gas after will handling through first step gravitational dust collection is introduced tornado dust collector, separating nickel chromium powder dirt; The temperature that flue gas leaves tornado dust collector is 960～1000 ℃;
3) will enter third stage bag-type dust again through after the dust separating smoke combustion in the second stage, catch plumbous zinc powder dirt.
In described step 1), the critical flow velocity of control flue gas on the gravity settling chamber section is 0.2～0.8m/s.In described step 2) in, it is 15～25m/s that the control flue gas enters the tornado dust collector flow velocity, the dust contained flue gas concentration that enters tornado dust collector is lower than 200g/Nm
3
Described bag-type dust is that gas fume after burning is passed through sack cleaner, its filtration velocity v=1～2m/min, and the control flue-gas temperature is for being higher than 30～50 ℃ of dew-point temperatures.
Adopt the mode of the 4th hole smoke evacuation during Electric furnace steel making, flue gas is incubated.
The dust separation system of heterogeneity in a kind of stainless steel smelting process involved in the present invention, it is characterized in that: comprise gravity settling chamber, tornado dust collector, combustion chamber and sack cleaner, the inlet of described gravity settling chamber connects the smoke discharging pipe of steel melting furnace, described gravity settling chamber, tornado dust collector, combustion chamber and sack cleaner are connected in series successively by pipeline, and wherein steel melting furnace, gravity settling chamber, tornado dust collector are the sealing connection that prevents air admission.
The smoke discharging pipe that connects steel melting furnace, gravity settling chamber, tornado dust collector adopts lagging material and refractory materials, described gravitational precipitator inner lining refractory, described tornado dust collector inner lining refractory or employing stupalith.
The height H of described gravity settling chamber, length L, particle sinking speed v
sWith flue gas flow rate v
0Satisfy following relation: H＜L*v
s/ v
0
As improvement, tornado dust collector are 2N, are divided into two groups of in parallel uses, every group N series connection, and wherein N is a positive integer.
As improvement, described combustion chamber is provided with forced air supply system or natural air inlet kink setting device, described combustion chamber is equipped with the controller that is used to detect the transmitter of CO concentration in flue gas and is used to control described forced air supply system or natural air inlet kink setting device, and this sensor output signal is to described controller.
Total filtration area F=Q/60v of the filter bag of described sack cleaner, Q are flue gas flow.
Know-why of the present invention is as follows:
Find in the different components dust analysis research of observing and collecting by the stainless steel smelting production practice that molten steel and the slag melt taken out of by hot gas flow in the metallurgical furnace have following four kinds of forms:
1. the material of smelting process adding is directly taken out of by hot gas flow, and as slag former that replenishes and the coal dust that sprays into etc., these powders directly enter dust-removal system with the form of solid particulate usually.
2. the volatilization of lower boiling metal, as go in the furnace charge metals such as lead, zinc, cadmium be reduced the back in partial high-temperature zone or the volatilization of oxygen blast district enter dust-removal system.
3. in the violent stirring of metallurgical furnace internal cause, the melt in the molten bath is stirred with small droplets enters flue gas.
4. the stainless steel smelting decarburization produces a large amount of CO bubbles, and the melt that bubble surface carries is taken body of heater out of and entered dust-removal system at bubble when weld pool surface breaks.
In the mode that above four kinds of dust produce, (massfraction, down with) directly taken and accounted for 8% to hot gas flow out of, and the volatilization of lower boiling metal accounts for 27%, and the CO bubble low-priced drop that goes out that breaks accounts for 60%, and the drop that vigorous agitation is taken out of accounts for 5%.When effectively controlling the smelting process operational condition, the part that solid particulate directly flies out is quite few, and the bigger drop that part sputters will return the molten bath under the effect of gravity, and therefore the dust that produces owing to the CO collapse of bubbles is its major portion.
The collapse of bubbles process can be divided into three different stages, and dust produces with two kinds of different forms respectively.In the time of among bubble is present in the stainless steel smelting melt, bubble rises gradually and carries part melt liquid film, and this liquid film is attenuation gradually when bubble rises, and finally reaches the slag melt surface, further produces dust with collapse of bubbles, and its process referring to Fig. 1 a).
When the thickness that is present in the air bubble liquid-membrane on stainless steel metallurgical melt surface is decreased to a certain critical size, bubble will be with Fig. 1 b) mode break and bubble liquid cap will be split into tiny film and drip (film drops), the size of bubble is relevant with quantity and diameter that film drips, the quantity that film drips is proportional to the surface-area of air bubble liquid-membrane, and the diameter that film drips distributes between 0.3～50 μ m.Stay the hole, hole at the liquid slag bath surface in a flash after bubble breaks and since around melt pour in produce upward to unstable Rayleigh (Rayleigh) spray, thereby produce liquid droplets (jet drops) (seeing Fig. 1 c)).The break quantity of the liquid droplets that produces of a general bubble can not surpass 10, and quantity also will reduce along with the increase of bubble size, liquid droplets typically have a diameter from 0.1～0.18 times of bubble diameter.
Steel-making dust in the dust-removal system has two kinds to form mechanism.First kind of mechanism is heterogeneous deposition, be that the evaporable metal deposition is in the solid particles surface that enters dust-removal system, for keeping stove dirt to have lower surface energy, most metal deposition are carried out by this way, therefore in the stove dirt smaller particles progressively machinery centralization be bigger particle, particle diameter can reach 800 μ m.This gathers process and relies on the particulate electrostatic attraction to finish.Second kind of mechanism is the homogeneous phase forming core and grow up, and when not having enough solid particulates to gather with first kind of mechanism, evaporable metal homogeneous phase forming core adheres to finish by the collision between gaseous substance and grows up.When particle is grown up to 0.02～1.0 μ m, form dust by the first mechanism machinery centralization.
Therefore, the transformation by existing dust-removal system changes present one-level bag-type dusting into gravity settling chamber, tornado dust collector, sack cleaner 3-stage dust-removal, can realize the separation of heterogeneity dust.The liquid droplets size is bigger, and its main component is a copper smelter slag, will be deposited in the gravity settling chamber.It is less that film drips size, and its main component is a mother liquor of stainless steel, will be deposited in the tornado dust collector.Flue gas through front two-stage dedusting after introducing air, plumbous zinc oxidation and finally being deposited in the sack cleaner.
The separation of stainless steel smelting process heterogeneity dust of the present invention proposes on a large amount of theories and basis of experimental, realize that technical scheme of the present invention is to control flue-gas temperature and separate step by step, implement this patent and obtain slag dust, nickel chromium triangle dust, plumbous zinc powder dirt respectively, its concrete steps comprise:
1) separation of slag dust
The stainless steel smelting flue-gas temperature of coming out of the stove is 1200～1400 ℃, adopts the mode of the 4th hole smoke evacuation during Electric furnace steel making, and simultaneously to the flue gas insulation and prevent entering in a large number of air, flue adopts refractory materials, and the control flue-gas temperature is higher than 1000 ℃.At this moment have in the flue gas particle diameter greater than the liquid droplets of 50 μ m, particle diameter less than the film of 50 μ m drip, the steams such as plumbous zinc of gaseous form, a spot of furnace charge add the particle taken out of by hot gas flow and a large amount of CO and N
2Gas is introduced the gravity settling chamber that liner thermal insulation fire-resistant material is made with this flue gas, and flue gas settles down macrobead liquid droplets wherein indoor the staying for some time of gravity settling, and this liquid droplets is mainly slag composition.Therefore, separate acquisition slag dust by first step dedusting.
2) separation of nickel chromium triangle dust
Introduce second stage cleaning apparatus through the flue gas after the processing of first step gravitational precipitator, tornado dust collector are adopted in second stage dedusting, this fly-ash separator adopts refractory materials as liner or ceramic tornado dust collector, still require flue-gas temperature to be controlled at more than 1000 ℃ and prevent the air admission dust-removal system, at this moment particle diameter is that the film of 5～50 μ m drips and settles down in the flue gas, this film drips and is mainly the mother liquor of stainless steel composition, thereby separates acquisition nickel chromium triangle dust by second stage dedusting.
3) smoke combustion
Flue gas main component after the two-stage dedusting of front is: CO, N
2, plumbous zinc fume, drip solid particulate less than the film of 5 μ m, when adopting sack cleaner to handle, burn cloth bag and blast for preventing this flue gas, must reduce flue-gas temperature and CO concentration in flue gas.This flue gas is introduced combustion chambers burn, make CO and airborne O in the flue gas
2Reaction changes CO into
2, introduce cold wind then and reduce flue-gas temperature.The burning of flue gas and the introducing of cold wind will cause the zinc fume oxidation in the flue gas, make it be transformed into ZnO, part ZnO particle will drip in film less than 5 μ m mode forming core heterogeneous with grow up, part ZnO particle with homogeneous nucleation with grow up.Meanwhile, other metal during film drips also will be changed into oxide compound by further oxidation.
4) separation of plumbous zinc powder dirt
At last, flue gas is introduced sack cleaner capture fine dusts particle and Zinc oxide particles in the flue gas, the control flue-gas temperature is higher than 30～50 ℃ of dew-point temperatures and prevents that dewfall from causing corrosion to equipment, adopts the fiber filter bag to separate and obtains plumbous zinc powder dirt.The collected dust overwhelming majority is the fine particle of particle diameter less than 20 μ m, and wherein small part is the only ZnO single crystal particle of hundreds of nanometer of particle diameter, and this ZnO single crystal particle is present in the surface of dust granules.The fine dusts particle is ball-type, particle size range between 0.2～20 μ m, can be categorized as three kinds dissimilar.First type is uniform spherical granules, and its particle diameter is 2～3 μ m, and Chemical Composition is slag or molten steel.Second type is spherical granules heterogeneous, and this particle surface deposits many zinc, and contains the iron composition and be imbedded in the glassy phase.The third type is pure zinc oxide and plumbous oxide fine particle.
Beneficial effect of the present invention has:
(1) can realize the dust separation of heterogeneity.Adopt the 3-stage dust-removal mode, isolate the slag dust,, isolate the nickel chromium triangle dust,, isolate zinc lead powder dirt by third stage bag-type dusting by second stage cyclone dust removal by the dedusting of first step gravity settling.
(2) ensure the security of sepn process by utility appliance.The controller that is used to detect the transmitter of CO concentration in flue gas and is used to control described forced air supply system or natural air inlet kink setting device is installed in the combustion chamber, this transmitter, controller and forced air supply system or natural air inlet kink setting device have been formed the CO concentration control system, can prevent effectively that explosion hazard from taking place.
(3) effectively dedusting helps environment protection.This dust separation method and system adopt the 3-stage dust-removal mode, can effectively remove dust in flue gas, have reduced the dust that enters in the atmosphere, help environment protection.
(4) cost is low, drops into little, good in economic efficiency, easy to implement.The present invention makes full use of existing installation, and cost is low, drops into little, easy to spread and implement.In addition, the metal in the dust is carried out efficient recovery and have remarkable economic efficiency.
Description of drawings
Fig. 1 be bubble at bath surface rupture process synoptic diagram, wherein a) bubble exist with bath surface under synoptic diagram, b) liquid-sheet disintegration synoptic diagram, c) droplet jet synoptic diagram;
Fig. 2 is the dust separation system schematic of heterogeneity in the embodiments of the invention 2 pairing stainless steel smelting process.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
Embodiment 1:
The method of heterogeneity dust separation in the stainless steel smelting process, its step comprises:
(1) adopt the gravity settling chamber of inner lining refractory as first step dedusting, refractory materials adopts magnesia brick or alumina brick, the temperature that the control flue gas enters gravity settling chamber is higher than more than 1000 ℃, the critical flow velocity of control flue gas on the settling pocket section is in the scope of 0.2～0.8m/s, and the pressure-losses of settling pocket is 50～100Pa.In the settling pocket design, control settling pocket minimum length L
Min=Hv
0/ v
sOr settling pocket height H＜Lv
s/ v
0, settling pocket width W=Q
t/ v
0H, wherein: Q
tBe the flue gas flow (m under the working order
3/ s), L is that settling pocket length (m), H are settling pocket height (m), v
0Be flow velocity (m/s), the v of flue gas by the settling pocket section
sBe the settling velocity (m/s) of solid particulate in the flue gas under action of gravity.Must be in the design with the flue gas flow Q under the standard state
0Be scaled the flue gas flow Q under the working order
t, its conversion method is:
(2) adopt the tornado dust collector of inner lining refractory as second stage dedusting, refractory materials adopts magnesia brick or alumina brick, tornado dust collector adopt the XLP/B type, also can adopt ceramic tornado dust collector, this fly-ash separator is by ceramic cyclone body, ceramic cyclone, and ceramic air-exhaust pipe and ceramic guider are formed.Cyclone system is provided with six tornado dust collector altogether, is divided into two groups of uses in parallel, every group of three series connection.The temperature that the control flue gas enters tornado dust collector is higher than more than 960 ℃, and the control flue gas enters the scope of tornado dust collector flow velocity at 15～25m/s, and the dust contained flue gas concentration that control enters tornado dust collector is lower than 200g/Nm
3, the pressure-losses of each tornado dust collector is 600～2000Pa.In the tornado dust collector design, barrel diameter must not be less than 200mm, and inner core vapor pipe diameter must not be less than 50mm, and the cylindrical section height is 1.5～2 times of barrel diameter, and the conical section height is 2～2.5 times of barrel diameter.
(3) plain combustion chamber is adopted in burning, oxygen oil burner, empty oil burner or coal gas burner are set in the combustion chamber, when flue-gas temperature below 610 ℃ the time in the flue gas CO do not possess autoignition conditions, for guaranteeing CO and the abundant burning that sprays into fuel in the flue gas, the combustion chamber is provided with forced air supply system or natural air inlet kink setting device, and the air capacity of sending into is supplied with 0.5m by every cubic metre of CO of burning
3Oxygen, be 2.83m
3Air calculate, the CO combustion reaction time the combustion chamber in is by 1～2s consideration.The structure formation of combustion chamber adopts the iron structure inner lining as thermal insulation material, and the bottom, combustion chamber is deposited ash and can be adopted ash bucket or rectangle to land to deposit grey form, and ash bucket is deposited the ash discharge of ash by the high temperature unloading valve, and rectangle lands the ash discharge mode of depositing ash and adopts forklift shovel ash.Combustion chamber body is considered the explosion-proof relief after gaseous combustion is expanded, pressure release area and detonation pressure power leave enough safety control, online detection CO concentration in flue gas is adopted in the combustion chamber, make CO gas perfect combustion in the combustion chamber by air capacity that regulate to supply with the combustion chamber, assurance enters the CO concentration in flue gas of rear portion equipment well below limits of explosion concentration, prevents explosion hazard.
(4) sack cleaner of standard is adopted in third stage dedusting, but selector tool rapping sack cleaner, blowback wind sleeve formula fly-ash separator, pulse bag type dust collector, flat sack cleaner, and filter pocket material adopts polyster fibre, terylene Nomex, glass fibre etc.Filtration velocity v=1～the 2m/min of control sack cleaner, control flue-gas temperature scope of 30～50 ℃ more than dew point, total filtration area F=Q/60v of filter bag (Q is a flue gas flow), the pressure-losses is controlled between 800～1600Pa.
Embodiment 2:
As shown in Figure 2, the dust separation system of heterogeneity in a kind of stainless steel smelting process, comprise gravity settling chamber, tornado dust collector, combustion chamber and sack cleaner, the inlet of described gravity settling chamber connects the smoke discharging pipe (smoke evacuation of the 4th hole) of steel melting furnace, described gravity settling chamber, tornado dust collector, combustion chamber and sack cleaner are connected in series successively by pipeline, and wherein steel melting furnace, gravity settling chamber, tornado dust collector are the sealing connection that prevents air admission.The smoke discharging pipe that connects steel melting furnace, gravity settling chamber, tornado dust collector adopts lagging material and refractory materials, described gravitational precipitator inner lining refractory, described tornado dust collector inner lining refractory or employing stupalith.The height H of described gravity settling chamber, length L, particle sinking speed v
sWith flue gas flow rate v
0Satisfy following relation: H＜L*v
s/ v
0Tornado dust collector are 6, are divided into two groups of uses in parallel, every group of 3 series connection.Described combustion chamber body is considered the explosion-proof relief after gaseous combustion is expanded, and pressure release area and detonation pressure power leave enough safety control.Described combustion chamber is provided with forced air supply system or natural air inlet kink setting device, described combustion chamber is equipped with the controller that is used to detect the transmitter of CO concentration in flue gas and is used to control described forced air supply system or natural air inlet kink setting device, and this sensor output signal is to described controller.Form a Controlling System by the sensor, controller and forced air supply system or natural air inlet kink setting device, be used for making inflammable gas (CO) perfect combustion in the combustion chamber by air capacity that regulate to supply with the combustion chamber, assurance enters the CO concentration in flue gas of rear portion equipment well below limits of explosion concentration, prevents explosion hazard.Total filtration area F=Q/60v of the filter bag of described sack cleaner, Q are flue gas flow.
Claims (10)
1, the method for heterogeneity dust separation in a kind of stainless steel smelting process is characterized in that, may further comprise the steps:
1) first step gravitational dust collection is preventing that under the condition of air admission stainless steel smelting being gone out kiln gas introduces gravity settling chamber, parting furnace slag dust; The temperature that flue gas enters gravity settling chamber is 1000～1400 ℃;
2) second stage dedusting is preventing will to introduce tornado dust collector, separating nickel chromium powder dirt through the flue gas after the processing of first step gravitational dust collection under the condition of air admission; The temperature that flue gas leaves tornado dust collector is 960～1000 ℃;
3) will enter third stage bag-type dust again through after the dust separating smoke combustion in the second stage, catch plumbous zinc powder dirt.
2, the method for heterogeneity dust separation in a kind of stainless steel smelting process as claimed in claim 1 is characterized in that, in described step 1), the critical flow velocity of control flue gas on the gravity settling chamber section is 0.2～0.8m/s.
3, the method for heterogeneity dust separation in a kind of stainless steel smelting process as claimed in claim 1, it is characterized in that, in described step 2) in, it is 15～25m/s that the control flue gas enters the tornado dust collector flow velocity, the dust contained flue gas concentration that enters tornado dust collector is lower than 200g/Nm
3
4, the method for heterogeneity dust separation in a kind of stainless steel smelting process as claimed in claim 1, it is characterized in that, described bag-type dust is that gas fume after burning is passed through sack cleaner, its filtration velocity v=1～2m/min, and the control flue-gas temperature is higher than 30～50 ℃ of dew-point temperatures.
5, as the method for heterogeneity dust separation in the described a kind of stainless steel smelting process of one of claim 1 to 4, it is characterized in that, adopt the mode of the 4th hole smoke evacuation during Electric furnace steel making, simultaneously flue gas is incubated.
6, the dust separation system of heterogeneity in a kind of stainless steel smelting process, it is characterized in that: comprise gravity settling chamber, tornado dust collector, combustion chamber and sack cleaner, the inlet of described gravity settling chamber connects the smoke discharging pipe of steel melting furnace, described gravity settling chamber, tornado dust collector, combustion chamber and sack cleaner are connected in series successively by smoke discharging pipe, and wherein steel melting furnace, gravity settling chamber and tornado dust collector are the sealing that prevents air admission and are connected.
7, the dust separation system of heterogeneity in a kind of stainless steel smelting process as claimed in claim 6, it is characterized in that: the smoke discharging pipe that connects steel melting furnace, gravity settling chamber and tornado dust collector adopts lagging material and refractory materials, described gravity settling chamber inner lining refractory, described tornado dust collector inner lining refractory or employing stupalith.
8, the dust separation system of heterogeneity in a kind of stainless steel smelting process as claimed in claim 6 is characterized in that: the height H of described gravity settling chamber, length L, particle sinking speed v
sWith flue gas flow rate v
0Satisfy following relation: H＜L*v
s/ v
0
9, the dust separation system of heterogeneity in a kind of stainless steel smelting process as claimed in claim 6 is characterized in that: tornado dust collector are 2N, are divided into two groups of in parallel uses, every group N series connection, and wherein N is a positive integer.
10, as the dust separation system of heterogeneity in the described a kind of stainless steel smelting process of one of claim 6 to 9, it is characterized in that: described combustion chamber is provided with forced air supply system or natural air inlet kink setting device, described combustion chamber is equipped with the controller that is used to detect the transmitter of CO concentration in flue gas and is used to control described forced air supply system or natural air inlet kink setting device, and this sensor output signal is to described controller.
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| CN101988888B (en) * | 2010-08-31 | 2012-08-29 | 吕军 | Method for detecting cleanness of multiple sampling points automatically and continuously |
| CN101993996B (en) * | 2010-08-31 | 2012-12-12 | 吕军 | System for realizing automatic and continuous cleanness detection of multiple sample points |
| CN102011011B (en) * | 2010-09-19 | 2013-01-16 | 南京工业大学 | Method for recycling and handling low lead zinic waste residue |
| CN102338567A (en) * | 2011-08-29 | 2012-02-01 | 中冶赛迪工程技术股份有限公司 | Combustion settling chamber |
| CN103409646B (en) * | 2013-08-20 | 2014-08-06 | 赫章县金川锌业有限公司 | Method for preparing high-grade zinc oxide by utilizing cast iron dust |
| CN104888571A (en) * | 2015-06-25 | 2015-09-09 | 山东钢铁股份有限公司 | Industrial flue gas dust removal device |
| CN107715611B (en) * | 2017-10-24 | 2023-04-07 | 北矿磁材科技有限公司 | Method for collecting kiln tail dust of dry-process rotary kiln and reducing kiln tail gas emission |
| CN114854458A (en) * | 2022-05-23 | 2022-08-05 | 中冶京诚工程技术有限公司 | Method for enriching and recovering zinc-rich dust in zinc-containing gas |
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