CN203281144U - Purification system for high-temperature dusty gas during tin smelting - Google Patents
Purification system for high-temperature dusty gas during tin smelting Download PDFInfo
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- CN203281144U CN203281144U CN2013202299292U CN201320229929U CN203281144U CN 203281144 U CN203281144 U CN 203281144U CN 2013202299292 U CN2013202299292 U CN 2013202299292U CN 201320229929 U CN201320229929 U CN 201320229929U CN 203281144 U CN203281144 U CN 203281144U
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Abstract
The utility model discloses a purification system for high-temperature dusty gas during tin smelting, which has a shorter process flow. The purification system comprises a dust collecting unit, a cooling unit and a tail gas processing unit which are sequentially connected in series, wherein the dust collecting unit is connected with an industrial furnace in a tin smelting process to treat low-arsenic-content high-temperature dusty gas emitted by the industrial furnace (such as low-arsenic-content high-temperature dusty gas generated during sulfiding volatilization in a fuming furnace, which is mentioned in the background technology); the dust collecting unit comprises a gas filtering device which is directly connected with the industrial furnace or connected with the industrial furnace through a mechanical dust collector with the inlet temperature below 900 DEG C; the filtering material in the gas filtering device is made of a high-temperature- sintering resistant inorganic porous material, and the filtering precision of the material to the dusty gas is 0.05-1 micron. Since a link special for arsenic recovery is not set in the dust collecting unit, the process flow of the purification system for the high-temperature dusty gas during tin smelting is greatly shortened.
Description
Technical field
The utility model relates to the flue gases purification in the tin field of smelting, the high-temperature dust-containing flue gas cleaning system during tin is smelted.
Background technology
Present tin is smelted to produce and is generally comprised four main process: the one, the tin concentrate is refined front calcination process; The 2nd, tin oxide concentrate or tin concentrate calcining are carried out reduction melting; The 3rd, the rich slag of the tin of reduction melting operation output is carried out sulfiding volatilization; The 4th, the thick tin of reduction melting operation output is carried out refining.In the prior art, mainly contain multiple hearth furnace, fluidized bed furnace or rotary kiln for the Industrial Stoves that the tin concentrate refined front calcination process; The Industrial Stoves that are used for tin oxide concentrate or tin concentrate calcining are carried out reduction melting mainly contain reverberatory furnace, electric arc furnaces, Ausmelt furnace or Chinese mugwort Sa smelting furnace; Be used for the Industrial Stoves that the rich slag of the tin of reduction melting operation output carries out sulfiding volatilization are mainly fuming furnace.When tin smelt to be produced, above-mentioned these Industrial Stoves all can the output high-temperature dust-containing flue gas, therefore, the processing of these high-temperature dust-containing flue gas is just become tin smelt in producing the important topic that can not be ignored.
Take the boiling roaster of tin concentrate as example: at first present tin concentrate calcination process technique be to obtain respectively calcining and high-temperature dust-containing flue gas by boiling roaster, contains the As that in former tin concentrate, most of arsenic generates through oxidizing roasting in this high-temperature dust-containing flue gas
2O
3Steam and a large amount of stanniferous dust, at first this ash-laden gas is admitted to cyclone dust collectors and carries out preliminary gas solid separation, and the content that reclaims tin in the dust that obtains is higher, can directly return to boiling roaster, and because the efficiency of dust collection of cyclone dust collectors is lower, As
2O
3Steam and more stanniferous dust escape and enter surface-cooler from the exhaust outlet of cyclone dust collectors and further cool, at this moment, and As
2O
3Steam changes As into
2O
3The solid state crystallization body, after this, carry out udst separation by fiber bag precipitator to ash-laden gas, reclaims and obtain high arsenic powder dirt, and tail gas enters follow-up desulfurization and processes, and finally enters atmosphere; The high arsenic powder dirt of gained then is sent to again electric heating rotary kiln and heats, the As that produces
2O
3Steam obtains high-grade arsenic dirt after by condensation and the dedusting of two-stage cloth-bag type, and the residue after volatilization returns to tin and smelts main flow and process.
Fuming furnace take the rich slag of tin volatilizees as example: at first the fuming furnace volatilization treatment process of the rich slag of present tin is to obtain respectively waste residue and ash-laden gas by fuming furnace sulfiding volatilization, contains the As that in the rich slag of former tin, most arsenic generate through oxidizing roasting in this ash-laden gas
2O
3Steam and a large amount of SnS steam, at first this ash-laden gas is admitted to waste heat boiler and cools, and at first SnS steam wherein changes SnS solid state crystallization body into, and then enters surface-cooler and further lower the temperature, at this moment, As
2O
3Steam changes As into
2O
3The solid state crystallization body, after this, by the two-stage fiber bag precipitator, ash-laden gas is carried out dedusting, reclaim and to obtain containing arsenic powder dirt (table 6 of " coming the behavior of arsenic in smelting tin system and the research of distribution; Wang Wei; popular science and technology, the 1st phase in 2012 " literary composition shows, the content (percentage by weight) of arsenic in this dust is only 1.4%, can think and belong to the dust that hangs down arsenic content), because arsenic content is lower, this contains arsenic powder dirt and return to again the reduction melting operation after granulating, and tail gas is made emission treatment.
Above-mentioned two examples are typical case that during tin is smelted, high-temperature dust-containing flue gas purifies.The application's utility model people therefrom sums up discovery, the large subject matter of high-temperature dust-containing flue gas purified treatment ubiquity two at present tin being smelted: the first, can't directly isolate efficiently arsenic from high-temperature dust-containing flue gas, so that recovery obtains a large amount of arsenic powder dirt that contain.Turn back in tin smelting flow process if these are contained arsenic powder dirt, can cause arsenic to circulate in whole system and add up, thereby affect tin, smelt production; If further refine arsenic by techniques such as high temperature evaporation, condensations from these high arsenic powder dirt, exist again system Construction and use cost higher, the problem of technological process complexity.The second, present high-temperature dust-containing flue gas cleaning system takes mechanical dust collector (comprising gravitational precipitator, cyclone dust collectors etc.), fiber bag precipitator to add the combination collocation form of cooling device more, and technological process is long, equipment is more.
The utility model content
At first the utility model will provide high-temperature dust-containing flue gas process for purifying and the special equipment row of a kind of tin that can efficiently isolate arsenic in smelting; It less importantly provides a kind of calcination process technique and special equipment row of realizing the tin concentrate of the efficient separation of arsenic in the tin roasted ore the utility model; In addition, the utility model also will provide the high-temperature dust-containing flue gas cleaning system of the shorter tin of two kinds of technological processes in smelting.
One, about high-temperature dust-containing flue gas process for purifying of the present utility model and special equipment row
High-temperature dust-containing flue gas process for purifying during tin is smelted, described high-temperature dust-containing flue gas comes from the Industrial Stoves in tin smelting flow process, the step that this process for purifying comprises is: the first smoke filtration and the second smoke filtration that one, successively described ash-laden gas are carried out: in the first smoke filtration, temperature is in the ash-laden gas to be filtered of 460～900 ℃ by the first filtering material; In the second smoke filtration, temperature is in the ash-laden gas to be filtered of 110～240 ℃ by the second filtering material; The ash-laden gas filtering accuracy of described the first filtering material and the second filtering material is 0.05～1 μ m, and at least the first filtering material is to consist of high temperature resistant sintering inorganic porous material; Two, reclaim the dust that obtains high tin content from the first smoke filtration; Reclaim the dust of the high arsenic content that obtains from the second smoke filtration, the tail gas after the second smoke filtration enters follow-up vent gas treatment.
In high-temperature dust-containing flue gas process for purifying during above-mentioned tin is smelted, before carrying out the first smoke filtration, can be first by the first cooling device, the temperature of ash-laden gas be down to below 580 ℃ that (to be 580 ℃ be the requirement that can reduce high-temperature behaviors such as the first filtering material anti-thermal shocks with next to Temperature Setting herein, the 2nd,, if the first cooling device is waste heat boiler, can also guarantee UTILIZATION OF VESIDUAL HEAT IN efficiency) and meet the temperature requirement of the first smoke filtration; Before carrying out the second smoke filtration, can first by the second cooling device, the ash-laden gas temperature be down to the requirement that meets the second smoke filtration.Wherein, in the first cooling device and the second cooling device, at least the first cooling device can be waste heat boiler, thereby realizes the effective utilization to waste heat.
In high-temperature dust-containing flue gas process for purifying during above-mentioned tin is smelted, can with temperature, be directly also that ash-laden gas more than 680 ℃ carries out the first smoke filtration, then the delivery temperature after with the first smoke filtration is down to the requirement that meets the second smoke filtration by cooling device, then the ash-laden gas after cooling is carried out the second smoke filtration.Wherein, described cooling device is preferably waste heat boiler.
In high-temperature dust-containing flue gas process for purifying during above-mentioned tin is smelted, at least the first filtering material can be selected from existing high temperature resistant sintered ceramic porous material, high temperature resistant sintering metal porous material.In described the first filtering material of the utility model suggestion and the second filtering material at least the first filtering material adopt thermal shock resistance better, higher sintering FeAl base intermetallic compound porous material or the sintering Fe of reliability during high temperature filtration
3Al base intermetallic compound porous material.
Term " ash-laden gas filtering accuracy " be defined as can filtering by mass 98% 〉=particle of a certain size, the size of this particle is filtering accuracy (lower with).For example, when the ash-laden gas filtering accuracy of the first filtering material and the second filtering material is 0.5 μ m, namely show the first filtering material and the second filtering material can the filtering ash-laden gas in the particle of 98% size 〉=0.5 μ m by mass.Utility model people finds, the purification of high-temperature dust-containing flue gas in smelting for tin, it is optimal selection that the ash-laden gas filtering accuracy of the first filtering material and the second filtering material is set as 0.05～1 μ m, because while being set in the ash-laden gas filtering accuracy in this interval, the beat all while shows excellent aspect filter efficiency, filtration pressure difference and filtering material regenerability, namely higher filter efficiency can either be guaranteed, suitable filtration pressure difference and good filtering material regenerability can be guaranteed again simultaneously.On this basis, the ash-laden gas filtering accuracy of described the first filtering material and the second filtering material preferably is 0.3～0.8 μ m.
In high-temperature dust-containing flue gas process for purifying during above-mentioned tin is smelted, described Industrial Stoves can comprise: tin is smelted in flow process and is used for the tin concentrate is refined multiple hearth furnace, fluidized bed furnace and the rotary kiln of front calcination process, be used for reverberatory furnace, electric arc furnaces, Ausmelt furnace and Ai Sa smelting furnace that tin oxide concentrate or tin concentrate calcining are carried out reduction melting, and any one of fuming furnace that is used for the rich slag of the tin of reduction melting operation output is carried out sulfiding volatilization.
In high-temperature dust-containing flue gas process for purifying during above-mentioned tin is smelted, described the second filtering material can be formed or be adopted cloth bag by the sintering inorganic porous material.
In high-temperature dust-containing flue gas process for purifying during above-mentioned tin is smelted, preferably the temperature of ash-laden gas to be filtered is controlled at below 200 ℃ in described the second smoke filtration, so that As
2O
3Steam fully changes As into
2O
3The solid state crystallization body.
In high-temperature dust-containing flue gas process for purifying during above-mentioned tin is smelted, described vent gas treatment comprises the desulfurization processing.
The special equipment row of above-mentioned technique, comprise with tin and smelt the unit that gathers dust that the Industrial Stoves in flow process are connected, process by this unit that gathers dust from the high-temperature dust-containing flue gas of described Industrial Stoves discharging, the end of unit of gathering dust connects tail gas treating unit, the described unit that gathers dust successively comprises: the first filtrating equipment of flue gas, and it has the first filtering material that filters for the ash-laden gas to be filtered that temperature is in 460～900 ℃; The second filtrating equipment of flue gas, it has the second filtering material that filters for the ash-laden gas to be filtered that temperature is in 110～240 ℃; The ash-laden gas filtering accuracy of described the first filtering material and the second filtering material is 0.05～1 μ m, and at least the first filtering material is to consist of high temperature resistant sintering inorganic porous material.
In high-temperature dust-containing flue gas cleaning equipment row during above-mentioned tin is smelted, can also comprise the first cooling device and the second cooling device, described the first cooling device is used for the temperature requirement of being down to the temperature of ash-laden gas below 580 ℃ and meeting the first smoke filtration between Industrial Stoves and the first filtrating equipment of flue gas, described the second cooling device is used for the ash-laden gas temperature is down to the requirement that meets the second smoke filtration between the first filtrating equipment of flue gas and the second filtrating equipment of flue gas; In the first cooling device and the second cooling device, at least the first cooling device is waste heat boiler.
In high-temperature dust-containing flue gas cleaning equipment row during above-mentioned tin is smelted, the inlet temperature of described the first filtrating equipment of flue gas also can be for more than 680 ℃; Be provided with the waste heat boiler that meets the second smoke filtration requirement for the ash-laden gas temperature is down between the first filtrating equipment of flue gas and the second filtrating equipment of flue gas.
Described Industrial Stoves can comprise: tin is smelted in flow process and is used for the tin concentrate is refined multiple hearth furnace, fluidized bed furnace and the rotary kiln of front calcination process, be used for reverberatory furnace, electric arc furnaces, Ausmelt furnace and Ai Sa smelting furnace that tin oxide concentrate or tin concentrate calcining are carried out reduction melting, and any one of fuming furnace that is used for the rich slag of the tin of reduction melting operation output is carried out sulfiding volatilization.
Smelt arsenical in high-temperature dust-containing flue gas based on tin and (mainly refer to As
2O
3) (mainly refer to SnO with sn-containing compound
2Or SnS) difference of boiling point, when the temperature of tin smelting high-temperature dust-containing flue gas was in 460～900 ℃, arsenic was with As
2O
3The form of steam exists, and sn-containing compound is solid-state, at this moment, after filtering by the first filtering material, in flue gas, stanniferous dust is removed substantially, obtains the dust of high tin content, has realized thus the efficient separation of tin, arsenic; When the temperature of ash-laden gas is in 110～240 ℃, As
2O
3Steam changes As into
2O
3The solid state crystallization body, at this moment, after filtering by the second filtering material, can obtain the dust of high arsenic content.Like this, the dust of high tin content can return to tin and smelt in flow process, tin is used more effectively, and the dust of high arsenic content is discharged from tin smelting flow process, avoid tin to smelt the circulative accumulation of arsenic in flow process, while, because arsenic grade in the dust of the high arsenic content of gained is higher, is conducive to the later use (the white arsenic of recovery can directly be applied as industrial products) of arsenic, saves follow-up arsenic and reclaims the recovery purifying technique of the arsenic such as high temperature evaporation, condensation process.
Two, calcination process technique and the special equipment about tin concentrate of the present utility model is listed as
The calcination process technique of tin concentrate of the present utility model, this technique can realize the efficient of arsenic in the tin roasted ore general name of recovery dust (calcining with) separated, it step that comprises is: one, the tin concentrate is carried out roasting, obtain respectively calcining and ash-laden gas, contain the As that in former tin concentrate, most of arsenic generates through oxidizing roasting in this ash-laden gas
2O
3Steam; Two, the first smoke filtration and the second smoke filtration that successively described ash-laden gas are carried out: in the first smoke filtration, temperature is in the ash-laden gas to be filtered of 460～900 ℃ by the first filtering material; In the second smoke filtration, temperature is in the ash-laden gas to be filtered of 110～240 ℃ by the second filtering material; The ash-laden gas filtering accuracy of described the first filtering material and the second filtering material is 0.05～1 μ m, and at least the first filtering material is to consist of high temperature resistant sintering inorganic porous material; Three, will reclaim the dust that obtains from the first smoke filtration and return to calcination steps, or together with described calcining as the raw material of follow-up reduction melting operation; To reclaim the dust of the enrichment arsenic that obtains and smelt flow process and discharge from tin from the second smoke filtration, the tail gas after the second smoke filtration enters follow-up vent gas treatment.
In the calcination process technique of above-mentioned tin concentrate, before carrying out the first smoke filtration, can first by the first cooling device, be down to below 580 ℃ the temperature of ash-laden gas and the temperature requirement of satisfied the first smoke filtration; Before carrying out the second smoke filtration, can first by the second cooling device, the ash-laden gas temperature be down to the requirement that meets the second smoke filtration.
In the calcination process technique of above-mentioned tin concentrate, can with temperature, be directly also that ash-laden gas more than 680 ℃ carries out the first smoke filtration, then the delivery temperature after with the first smoke filtration is down to the requirement that meets the second smoke filtration by cooling device, then the ash-laden gas after cooling is carried out the second smoke filtration.
In the calcination process technique of above-mentioned tin concentrate, in described the first filtering material and the second filtering material, at least the first filtering material is preferably by sintering FeAl base intermetallic compound porous material or sintering Fe
3Al base intermetallic compound porous material forms.
In the calcination process technique of above-mentioned tin concentrate, the ash-laden gas filtering accuracy of described the first filtering material and the second filtering material is all preferably at 0.3～0.8 μ m.
In the calcination process technique of above-mentioned tin concentrate, described the second filtering material can be formed or be adopted cloth bag by the sintering inorganic porous material.
In the calcination process technique of above-mentioned tin concentrate, preferably the temperature of ash-laden gas to be filtered is controlled at below 200 ℃ in described the second smoke filtration.
In the calcination process technique of above-mentioned tin concentrate, described vent gas treatment comprises the desulfurization processing.
Be exclusively used in the equipment row of the calcination process technique of above-mentioned tin concentrate, comprise roaster (comprising that multiple hearth furnace, fluidized bed furnace and rotary kiln are connected the tin concentrate is refined the Industrial Stoves of front calcination process operation) and the unit that gathers dust that is connected with roaster, contain the As that in former tin concentrate, most of arsenic generates through oxidizing roasting from the ash-laden gas of described roaster discharging
2O
3Steam, this ash-laden gas is processed by the unit that gathers dust, the end of unit of gathering dust connects tail gas treating unit, and the described unit that gathers dust successively comprises: the first filtrating equipment of flue gas, and it has the first filtering material that filters for the ash-laden gas to be filtered that temperature is in 460～900 ℃; The second filtrating equipment of flue gas, it has the second filtering material that filters for the ash-laden gas to be filtered that temperature is in 110～240 ℃; The ash-laden gas filtering accuracy of described the first filtering material and the second filtering material is 0.05～1 μ m, and at least the first filtering material is to consist of high temperature resistant sintering inorganic porous material.
Can also comprise the first cooling device and the second cooling device in the calcination process equipment row of above-mentioned tin concentrate, described the first cooling device is used for the temperature requirement of being down to the temperature of ash-laden gas below 580 ℃ and meeting the first smoke filtration between roaster and the first filtrating equipment of flue gas, described the second cooling device is used for the ash-laden gas temperature is down to the requirement that meets the second smoke filtration between the first filtrating equipment of flue gas and the second filtrating equipment of flue gas; In the first cooling device and the second cooling device, at least the first cooling device is waste heat boiler.
In the calcination process equipment row of above-mentioned tin concentrate, the inlet temperature of described the first filtrating equipment of flue gas also can be for more than 680 ℃; Be provided with the waste heat boiler that meets the second smoke filtration requirement for the ash-laden gas temperature is down between the first filtrating equipment of flue gas and the second filtrating equipment of flue gas.
In the calcination process equipment row of above-mentioned tin concentrate, described tail gas treating unit comprises the equipment that carries out tail gas desulfurization processing.
Above-mentioned tin concentrate calcination process technique is smelted the different of arsenical and sn-containing compound boiling point in high-temperature dust-containing flue gas based on tin equally, and when the temperature of tin smelting high-temperature dust-containing flue gas was in 460～900 ℃, arsenic was with As
2O
3The form of steam exists, and sn-containing compound is solid-state, at this moment, after filtering by the first filtering material, in flue gas, stanniferous dust is removed substantially, obtains the dust of high tin content, and has realized the efficient separation of tin, arsenic; When the temperature of ash-laden gas is in 110～240 ℃, As
2O
3Steam changes As into
2O
3The solid state crystallization body, at this moment, after filtering by the second filtering material, can obtain the dust of high arsenic content.Like this, the dust of high tin content is returned to tin to be smelted in flow process, tin is used more effectively, and the dust of high arsenic content is discharged from tin smelting flow process, avoid tin to smelt the circulative accumulation of arsenic in flow process, while, because arsenic grade in the dust of the high arsenic content of gained is higher, can directly be applied as industrial products.
Three, about the high-temperature dust-containing flue gas cleaning system in tin smelting of the present utility model
high-temperature dust-containing flue gas cleaning system during tin of the present utility model is smelted, comprise the successively unit that gathers dust of series connection, cooling unit and tail gas treating unit, the described unit that gathers dust is connected with the Industrial Stoves that tin is smelted in flow process, the low arsenic content high-temperature dust-containing flue gas (for example the fuming furnace sulfiding volatilization mentioned of background technology produce low arsenic content high-temperature dust-containing flue gas) that is used for described Industrial Stoves discharging is processed, the described unit that gathers dust comprises filtrating equipment of flue gas, this filtrating equipment of flue gas directly or be connected with Industrial Stoves by mechanical dust collector and inlet temperature is below 900 ℃, filtering material in described filtrating equipment of flue gas is to consist of high temperature resistant sintering inorganic porous material, this material is 0.05～1 μ m to the filtering accuracy of ash-laden gas.
In high-temperature dust-containing flue gas cleaning system during above-mentioned tin is smelted, described filtering material is preferably by sintering FeAl base intermetallic compound porous material or sintering Fe
3Al base intermetallic compound porous material forms.
In high-temperature dust-containing flue gas cleaning system during above-mentioned tin is smelted, described filtering material is preferably 0.3～0.8 μ m to the filtering accuracy of ash-laden gas.
In high-temperature dust-containing flue gas cleaning system during above-mentioned tin is smelted, described cooling unit is preferably waste heat boiler.
In high-temperature dust-containing flue gas cleaning system during above-mentioned tin is smelted, described tail gas treating unit comprises the equipment that carries out tail gas desulfurization processing.
Because the high-temperature dust-containing flue gas cleaning system in above-mentioned tin smelting is only processed for the low arsenic content high-temperature dust-containing flue gas of Industrial Stoves discharging, therefore the link of special recovery arsenic is not set in the unit that gathers dust, and only be provided with the one-level filtrating equipment of flue gas, so its technological process shortens dramatically.Certainly, the low arsenic content high-temperature dust-containing flue gas in smelting for this tin, still can adopt the high-temperature dust-containing flue gas process for purifying in the tin smelting that provides previously to process.
high-temperature dust-containing flue gas cleaning system during another kind of tin of the present utility model is smelted, comprise the successively cooling unit of series connection, unit and tail gas treating unit gather dust, the Industrial Stoves that the described unit that gathers dust smelts in flow process by cooling unit and tin are connected, be used for the ash-laden gas of described Industrial Stoves discharging is processed, the described unit that gathers dust comprises filtrating equipment of flue gas, this filtrating equipment of flue gas directly or be connected with cooling unit by mechanical dust collector and inlet temperature is 110～240 ℃, filtering material in described filtrating equipment of flue gas is to consist of the sintering inorganic porous material, this material is 0.05～1 μ m to the filtering accuracy of ash-laden gas.
In high-temperature dust-containing flue gas cleaning system during above-mentioned tin is smelted, described filtering material is preferably by sintering FeAl base intermetallic compound porous material or sintering Fe
3Al base intermetallic compound porous material forms.
In high-temperature dust-containing flue gas cleaning system during above-mentioned tin is smelted, described filtering material is preferably 0.3～0.8 μ m to the filtering accuracy of ash-laden gas.
In high-temperature dust-containing flue gas cleaning system during above-mentioned tin is smelted, described cooling unit is preferably waste heat boiler.
In high-temperature dust-containing flue gas cleaning system during above-mentioned tin is smelted, described tail gas treating unit comprises the equipment that carries out tail gas desulfurization processing.
The technological process length of the high-temperature dust-containing flue gas cleaning system during above-mentioned tin is smelted is substantially identical with the high-temperature dust-containing flue gas cleaning system of front, and just the position of cooling unit and filtrating equipment of flue gas is changed.Thereby this high-temperature dust-containing flue gas cleaning system has the shorter characteristics of technological process equally.In addition, this high-temperature dust-containing flue gas cleaning system not only can be processed the low arsenic content high-temperature dust-containing flue gas of Industrial Stoves discharging, also can process high arsenic content high-temperature dust-containing flue gas.
Below in conjunction with the drawings and specific embodiments, the utility model is described further.The aspect that the utility model is additional and advantage part in the following description provide, and part will become obviously from the following description, or by practice of the present utility model, recognize.
Description of drawings
Fig. 1 is the process chart of the utility model embodiment 1.
Fig. 2 is the process chart of the utility model embodiment 2.
Fig. 3 is the process chart of the utility model embodiment 3.
Fig. 4 is the process chart of the utility model embodiment 4.
Fig. 5 is utility model the people filter efficiency, filtration pressure difference when filtering tin and smelt high-temperature dust-containing flue gas the found change curve to filtering accuracy, in order to show the foundation of the utility model selection material filtering accuracy.
Fig. 6 is the change curve of material regeneration ability to filtering accuracy when filtering tin smelting high-temperature dust-containing flue gas that the utility model people finds, in order to show the foundation of the utility model selection material filtering accuracy.
The specific embodiment
Embodiment 1: the boiling roaster treatment process of tin concentrate reaches the purification for the boiling roaster high-temperature dust-containing flue gas
As shown in Figure 1, by boiling roaster, obtain respectively calcining and high-temperature dust-containing flue gas, the temperature of this ash-laden gas is roughly 800～900 ℃, wherein contains the As that in former tin concentrate, most of arsenic generates through oxidizing roasting
2O
3Steam and a large amount of stanniferous dust (are mainly SnO
2Particle); At first this ash-laden gas is admitted in waste heat boiler 1 cool (can certainly first by mechanical dust collector, carry out the rough dusting processing and send into waste heat boiler 1 again), the resulting temperature that cools is that the ash-laden gas of 480～500 ℃ is admitted in the first filtrating equipment of flue gas 2 again, the first filtering material in this first filtrating equipment of flue gas 2 adopts sintering FeAl base intermetallic compound porous material, its the highest can use in the high-temperature atmosphere of 900 ℃ of left and right, and its ash-laden gas filtering accuracy is 0.75 μ m; After the first filtrating equipment of flue gas 2 filters, stanniferous dust in former ash-laden gas more than 99% is removed, thereby obtain the dust of high tin content in the bottom of the first filtrating equipment of flue gas 2 deposition, the flue gas of the first filtrating equipment of flue gas 2 dischargings enters the second cooling device again; The second cooling device both can use waste heat boiler, also can use surface-cooler 3, and the ash-laden gas temperature of its discharging is 180～200 ℃, at this moment, and the As in ash-laden gas
2O
3Steam has fully changed the solid state crystallization body into, and enters subsequently in the second filtrating equipment of flue gas 4 and filter; The second filtering material in the second filtrating equipment of flue gas 4 adopts the sintered ceramic porous material, its ash-laden gas filtering accuracy 0.5 μ m, the arsenic powder dirt that contains more than 99% in ash-laden gas can be removed, thereby in the bottom of the second filtrating equipment of flue gas 4, deposit the dust that obtains high arsenic content; The tail gas of the second filtrating equipment of flue gas 4 enters follow-up tail gas treating unit, adopts milk of lime absorption SO wherein
2Or by the washing extracting sulfuric acid, the residual air after processing is directly discharged; The dust that reclaims the high tin content obtain from the first filtrating equipment of flue gas 2 returns to calcination steps, or together with described calcining as the raw material of follow-up reduction melting operation; Reclaiming the dust of the high arsenic content that obtains from the second filtrating equipment of flue gas 4 smelts flow process and discharges from tin.
Embodiment 2: the boiling roaster treatment process of tin concentrate reaches the purification for the boiling roaster high-temperature dust-containing flue gas
As shown in Figure 2, by boiling roaster, obtain respectively calcining and high-temperature dust-containing flue gas, the temperature of this ash-laden gas is roughly 800～900 ℃, wherein contains the As that in former tin concentrate, most of arsenic generates through oxidizing roasting
2O
3Steam and a large amount of stanniferous dust (are mainly SnO
2Particle); This ash-laden gas at first directly is admitted in the first filtrating equipment of flue gas 2 and (can certainly first by mechanical dust collector, carries out the rough dusting processing and send into the first filtrating equipment of flue gas again), the first filtering material in this first filtrating equipment of flue gas 2 adopts sintering FeAl base intermetallic compound porous material, its the highest can use in the high-temperature atmosphere of 900 ℃ of left and right, and its ash-laden gas filtering accuracy is 0.8 μ m; After the first filtrating equipment of flue gas 2 filters, stanniferous dust in former ash-laden gas more than 99% is removed, thereby obtain the dust of high tin content in the bottom of the first filtrating equipment of flue gas 2 deposition, the flue gas of the first filtrating equipment of flue gas 2 discharging enters in waste heat boiler 5 again and cools, and the resulting temperature that cools is that the ash-laden gas of 180～200 ℃ enters in the second filtrating equipment of flue gas 4 and filters; The second filtering material in the second filtrating equipment of flue gas 4 adopts cloth bag, and its ash-laden gas filtering accuracy 1.0 μ m, can remove the arsenic powder dirt that contains of 97% left and right in ash-laden gas, thereby obtains the dust of high arsenic content in the bottom of the second filtrating equipment of flue gas 4 deposition; The tail gas of the second filtrating equipment of flue gas 4 enters follow-up tail gas treating unit, adopts milk of lime absorption SO wherein
2Or by the washing extracting sulfuric acid, the residual air after processing is directly discharged; The dust that reclaims the high tin content obtain from the first filtrating equipment of flue gas 2 returns to calcination steps, or together with described calcining as the raw material of follow-up reduction melting operation; Reclaiming the dust of the high arsenic content that obtains from the second filtrating equipment of flue gas 4 smelts flow process and discharges from tin.
Can find by the contrast to embodiment 1 and embodiment 2,2 of embodiment have been undertaken once cooling specially by waste heat boiler 5, and therefore, the technological process of embodiment 2 can be shorter than embodiment 1.Even more important difference be, the first filtrating equipment of flue gas 2 of embodiment 1 is that the ash-laden gas that temperature is 480～500 ℃ is filtered, the first filtrating equipment of flue gas 2 of embodiment 2 is that the ash-laden gas that temperature is 800 ℃ of left and right is filtered, therefore, in fact, in 2 pairs of the first filtrating equipment of flue gas 2 of embodiment, the high temperature filtration performance of the first filtering material has higher requirement.Although the high temperature filtration performance requirement to the first filtering material is higher, the UTILIZATION OF VESIDUAL HEAT IN efficiency of embodiment 2 also can be higher than embodiment 1.Therefore, if the high temperature filtration performance of the first filtering material guarantee to some extent, the mode of embodiment 2 is adopted in suggestion, with shortened process and reach higher utilization rate of waste heat; If the high temperature filtration performance of the first filtering material is limited, the mode of embodiment 1 is adopted in suggestion.
Fig. 5, Fig. 6 be that the utility model people finds, smelt during high-temperature dust-containing flue gas filters filter efficiency, filtration pressure difference and the material regeneration ability change curve to the filtration of material precision at tin.Wherein, the material regeneration ability characterizes with the ability recovery rate that sees through of material.study above-mentioned the first smoke filtration, during the mechanism of in the second smoke filtration, the fluidized bed furnace ash-laden gas being filtered (tin smelt in other Industrial Stoves the ash-laden gas characteristic and the flue gas that produce very similar), utility model people finds: as shown in Figure 5, no matter be the first smoke filtration or the second smoke filtration, when the ash-laden gas filtering accuracy of material is 0.05 μ m, filtration pressure difference is in the normal index of 0.25～0.26Mp, and when the ash-laden gas filtering accuracy of material continues to dwindle, filtration pressure difference sharply increases unexpectedly, and the ash-laden gas filtering accuracy of working as material increases to the process of 1.1 μ m from 0.05 μ m, filtration pressure difference is decreased in the better interval of 0.1～0.15Mpa gradually, for filter efficiency, as shown in Figure 5, when the ash-laden gas filtering accuracy of material increases to 1.0 μ m from 0.05 μ m, the faint decline of filter efficiency, and when the ash-laden gas filtering accuracy continued to increase from 1.0 μ m, filter efficiency sharply descended suddenly, showed and wore the unexpected Zeng Qiang of filter phenomenon, for seeing through the ability recovery rate, as shown in Figure 6, when the ash-laden gas filtering accuracy of material increases to 0.8 μ m from 0.05 μ m, see through the faint decline of ability recovery rate, but remain at more than 93%, when the ash-laden gas filtering accuracy continues to increase from 0.8 μ m, see through the ability recovery rate and sharply descend suddenly, when reaching 1.0 μ m, the ash-laden gas filtering accuracy drops to 90% left and right., according to above-mentioned phenomenon, determine the ash-laden gas filtering accuracy of the first filtering material and the second filtering material is made as 0.05～1 μ m, but be preferably 0.3～0.8 μ m.
Embodiment 3: the cleaning system of the rich slag fuming furnace volatilization of tin high-temperature dust-containing flue gas
As shown in Figure 3, cleaning system comprises the unit that gathers dust, cooling unit and the tail gas treating unit of successively series connection, the described unit that gathers dust is connected with fuming furnace, be used for the low arsenic content high-temperature dust-containing flue gas of described fuming furnace discharging is processed, the described unit that gathers dust comprises filtrating equipment of flue gas 6, this filtrating equipment of flue gas 6 directly with fuming furnace, is connected and inlet temperature is below 900 ℃, filtering material in described filtrating equipment of flue gas 6 is to consist of sintering FeAl base intermetallic compound porous material, and this material is 0.5 μ m to the filtering accuracy of ash-laden gas.Wherein, described cooling unit adopts waste heat boiler 7.Described tail gas treating unit comprises the equipment that carries out tail gas desulfurization processing equally.
Embodiment 4: the cleaning system of the rich slag fuming furnace volatilization of tin high-temperature dust-containing flue gas
As shown in Figure 4, cleaning system comprise successively series connection cooling unit, unit and tail gas treating unit gather dust, the described unit that gathers dust is connected with fuming furnace by cooling unit, be used for the ash-laden gas of described fuming furnace discharging is processed, the described unit that gathers dust comprises filtrating equipment of flue gas 6, this filtrating equipment of flue gas 6 directly with cooling unit, is connected and inlet temperature is 180～200 ℃, and the filtering material in described filtrating equipment of flue gas 6 is specifically by sintering Fe
3Al base intermetallic compound porous material forms, and this material is 0.1 μ m to the filtering accuracy of ash-laden gas.Wherein, described cooling unit is waste heat boiler 7.Described tail gas treating unit comprises the equipment that carries out tail gas desulfurization processing.
Claims (10)
1. the high-temperature dust-containing flue gas cleaning system during tin is smelted, comprise the successively unit that gathers dust of series connection, cooling unit and tail gas treating unit, the described unit that gathers dust is connected with the Industrial Stoves that tin is smelted in flow process, be used for the low arsenic content high-temperature dust-containing flue gas of described Industrial Stoves discharging is processed, it is characterized in that: the described unit that gathers dust comprises filtrating equipment of flue gas (6), this filtrating equipment of flue gas (6) directly or be connected with Industrial Stoves by mechanical dust collector and inlet temperature is below 900 ℃, filtering material in described filtrating equipment of flue gas (6) is to consist of high temperature resistant sintering inorganic porous material, this material is 0.05～1 μ m to the filtering accuracy of ash-laden gas.
2. the high-temperature dust-containing flue gas cleaning system during tin as claimed in claim 1 is smelted, it is characterized in that: described filtering material is by sintering FeAl base intermetallic compound porous material or sintering Fe
3Al base intermetallic compound porous material forms.
3. the high-temperature dust-containing flue gas cleaning system during tin as claimed in claim 1 is smelted, it is characterized in that: described filtering material is 0.3～0.8 μ m to the filtering accuracy of ash-laden gas.
4. the high-temperature dust-containing flue gas cleaning system during tin as claimed in claim 1 is smelted is characterized in that: described cooling unit adopts waste heat boiler (7).
5. the high-temperature dust-containing flue gas cleaning system during tin as claimed in claim 1 is smelted is characterized in that: described tail gas treating unit comprises the equipment that carries out tail gas desulfurization processing.
6. the high-temperature dust-containing flue gas cleaning system during tin is smelted, comprise the successively cooling unit of series connection, unit and tail gas treating unit gather dust, the Industrial Stoves that the described unit that gathers dust smelts in flow process by cooling unit and tin are connected, be used for the ash-laden gas of described Industrial Stoves discharging is processed, it is characterized in that: the described unit that gathers dust comprises filtrating equipment of flue gas (6), this filtrating equipment of flue gas (6) directly or be connected with cooling unit by mechanical dust collector and inlet temperature is 110～240 ℃, filtering material in described filtrating equipment of flue gas (6) is to consist of the sintering inorganic porous material, this material is 0.05～1 μ m to the filtering accuracy of ash-laden gas.
7. the high-temperature dust-containing flue gas cleaning system during tin as claimed in claim 6 is smelted, it is characterized in that: described filtering material is by sintering FeAl base intermetallic compound porous material or sintering Fe
3Al base intermetallic compound porous material forms.
8. the high-temperature dust-containing flue gas cleaning system during tin as claimed in claim 6 is smelted, it is characterized in that: described filtering material is 0.3～0.8 μ m to the filtering accuracy of ash-laden gas.
9. the high-temperature dust-containing flue gas cleaning system during tin as claimed in claim 6 is smelted, it is characterized in that: described cooling unit is waste heat boiler (7).
10. the high-temperature dust-containing flue gas cleaning system during tin as claimed in claim 6 is smelted is characterized in that: described tail gas treating unit comprises the equipment that carries out tail gas desulfurization processing.
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| CN2013202299292U CN203281144U (en) | 2013-04-29 | 2013-04-29 | Purification system for high-temperature dusty gas during tin smelting |
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| CN103589869A (en) * | 2013-11-27 | 2014-02-19 | 郴州市金贵银业股份有限公司 | Method for selectively separating arsenic trioxide from non-ferrous metal smelter off-gas |
| CN104006672A (en) * | 2014-05-31 | 2014-08-27 | 成都易态科技有限公司 | Method for smoke discharging and dedusting of steel making electric furnace |
| WO2014176925A1 (en) * | 2013-04-29 | 2014-11-06 | 成都易态科技有限公司 | Purifying process and special equipment set for high-temperature dust-laden flue gas in tin smelting |
| CN105018731A (en) * | 2014-04-30 | 2015-11-04 | 成都易态科技有限公司 | Lead anodic slime smelting dust gasification and hierarchical temperature-control recovery process |
| CN106196127A (en) * | 2016-06-30 | 2016-12-07 | 安徽天顺环保设备股份有限公司 | A kind of mine heat furnace smelting flue gas cleaning method |
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| CN105018731A (en) * | 2014-04-30 | 2015-11-04 | 成都易态科技有限公司 | Lead anodic slime smelting dust gasification and hierarchical temperature-control recovery process |
| CN105018731B (en) * | 2014-04-30 | 2017-11-21 | 成都易态科技有限公司 | Lead anode slurry melting flue dust gasifies and graded temperature-control recovery process |
| CN104006672A (en) * | 2014-05-31 | 2014-08-27 | 成都易态科技有限公司 | Method for smoke discharging and dedusting of steel making electric furnace |
| CN106196127A (en) * | 2016-06-30 | 2016-12-07 | 安徽天顺环保设备股份有限公司 | A kind of mine heat furnace smelting flue gas cleaning method |
| CN107008912A (en) * | 2017-04-28 | 2017-08-04 | 江苏威拉里新材料科技有限公司 | A kind of gas purge system for smelting furnace |
| CN107166970A (en) * | 2017-05-23 | 2017-09-15 | 中冶东方工程技术有限公司 | Recovery method and retracting device for high siliceous metal smelting mine heat furnace |
| CN110172593A (en) * | 2019-06-13 | 2019-08-27 | 云南锡业股份有限公司铜业分公司 | A kind of energy-saving and environment-friendly tin smelting system and smelting process |
| CN110172593B (en) * | 2019-06-13 | 2023-04-28 | 云南锡业股份有限公司铜业分公司 | Energy-saving and environment-friendly tin smelting system and smelting process |
| CN110327758A (en) * | 2019-07-09 | 2019-10-15 | 云南锡业股份有限公司冶炼分公司 | A kind of tin smelts smoking gas containing fluorine treatment process and device |
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