CN207567315U - The system for handling arsenic-containing smoke dust - Google Patents
The system for handling arsenic-containing smoke dust Download PDFInfo
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- CN207567315U CN207567315U CN201721339353.XU CN201721339353U CN207567315U CN 207567315 U CN207567315 U CN 207567315U CN 201721339353 U CN201721339353 U CN 201721339353U CN 207567315 U CN207567315 U CN 207567315U
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Abstract
The utility model discloses a kind of system for handling arsenic-containing smoke dust, which includes：Mixing device has arsenic-containing smoke dust entrance, additive entrance, reducing agent entrance, binding agent entrance and mixed material outlet；Molding machine has mixed material entrance and the outlet of molding pelletizing；There is drying unit molding pelletizing entrance and dry pelletizing to export；Rotary hearth furnace, including：Rotatable stove bottom；Annular furnace along furnace bottom rotation direction, by barricade is divided into cloth area, preheating zone, mends wind anallobar, middle warm area, high-temperature region and discharge zone successively in the burner hearth that goes in ring；First flue, is arranged in preheating zone；Second flue, is arranged in middle warm area；Drawing mechanism is arranged in discharge zone；Wind supercharging burner is mended, is arranged in and mends wind anallobar；Fuel burner nozzle is arranged in preheating zone, middle warm area and high-temperature region；Dry pelletizing entrance；Exhanst gas outlet containing arsenic trioxide；Leaded zinc exhanst gas outlet；Hot product of roasting outlet.
Description
Technical field
The utility model belongs to metallurgical technology field, specifically, the utility model is related to handle the system of arsenic-containing smoke dust.
Background technology
The flue dust that colored metallurgical industrial generates is in the landfills such as copper, lead, zinc, cobalt, tin containing arsenic ore
Smelting, roasting or waste residue fuming removal process.Wherein, a variety of valuable metals such as Cu, Pb, Zn, chemical composition are contained in copper fumes
Complexity, and if copper fumes directly return to copper metallurgy industry, can not only greatly increase the impurity content of feed stock for blast furnace, deteriorate stove
Condition reduces the processing capacity of stove, and the circulative accumulation of the impurity such as As, Bi, Zn will directly affect electrolytic copper quality.In addition, As
Also by the service life for influencing relieving haperacidity catalyst and then reduce SO2Conversion ratio and sulfuric acid product quality.Therefore, by copper fumes from copper
Open circuit processing, comprehensively recovering valuable metal are very necessary in smelting system.
At present, domestic smelting enterprise mostly handles smelting smoke dust, i.e., is first used using " wet method+pyrogenic process " process integration
Water or dilute sulfuric acid leach the valuable elements such as Cu, Zn in cigarette ash, then recycled respectively；Leached mud (main leaded) is as dispensing
Return to the metals such as smelting system, pyrogenic process recycling Pb.Technological process is：One acidleach one of flue dust sinks copper one except one evaporative crystallization of iron arsenic sinks
One white vitriol of zinc, obtained leached mud send pyrogenic process process to recycle lead, and copper sponge send copper system to unite, and iron arsenic slag muck is deposited, seven water sulphur
It is sold outside sour zinc.But the technique there is also some problems：During wet-treating, the leaching rate of arsenic is not high for lead, Copper making flue dust,
Only 20%-30%, remaining most of arsenic are remained in leached mud, return to pyrogenic process process again by feed proportioning system, cycle can make
It obtains arsenic content in flue dust and is up to 40%-45%, endanger normal production；It is not easy to be immersed since the copper of a part of form is insoluble in acid
Go out, remain in leached mud so that copper recovery is down to 60%-65%.
Therefore, the technology of existing processing flue dust is further improved.
Utility model content
The utility model is intended to solve at least some of the technical problems in related technologies.For this purpose, this reality
It is to propose a kind of system with processing arsenic-containing smoke dust with a novel purpose.It can be significantly improved containing arsenic using the system
The high efficiente callback of the valuable metals such as arsenic, zinc, lead and copper in flue dust, so as to fulfill the recycling of arsenic-containing smoke dust.
In terms of one of the utility model, the utility model proposes it is a kind of handle arsenic-containing smoke dust system, according to
The embodiment of the utility model, the system include：
There is arsenic-containing smoke dust entrance, additive entrance, reducing agent entrance, binding agent to enter for mixing device, the mixing device
Mouth and mixed material outlet；
Molding machine, the molding machine have mixed material entrance and the outlet of molding pelletizing, the mixed material entrance
It is connected with mixed material outlet；
There is molding pelletizing entrance and dry pelletizing to export for drying unit, the drying unit, the molding pelletizing entrance
It is connected with the molding pelletizing outlet；
Rotary hearth furnace, the rotary hearth furnace include：
Rotatable stove bottom；
Annular furnace is divided into cloth area, pre- along the furnace bottom rotation direction, in the belt burner hearth successively by barricade
Wind anallobar, middle warm area, high-temperature region and discharge zone are mended in hot-zone；
First flue, first flue are arranged in the preheating zone；
Second flue, second flue are arranged in the middle warm area；
Drawing mechanism, the drawing mechanism are arranged in the discharge zone；
Wind supercharging burner is mended, the benefit wind supercharging burner is arranged in the benefit wind anallobar；
Fuel burner nozzle, the fuel burner nozzle are arranged in the preheating zone, the middle warm area and the high-temperature region；
Dry pelletizing entrance, the dry pelletizing entrance are arranged in the cloth area, and the dry pelletizing entrance with
The dry pelletizing outlet is connected；
Exhanst gas outlet containing arsenic trioxide, the exhanst gas outlet containing arsenic trioxide be arranged in the preheating zone and with it is described
First flue is connected；
Leaded zinc exhanst gas outlet, the leaded zinc exhanst gas outlet be arranged in the middle warm area and with the second flue phase
Even；
Hot product of roasting outlet, the hot product of roasting outlet are arranged in the discharge zone.
According to the system of the processing arsenic-containing smoke dust of the utility model embodiment by by arsenic-containing smoke dust, additive, reducing agent
It is molded and is dried successively after being mixed with binding agent, and gained drying pelletizing is supplied to rotary hearth furnace, in rotary hearth furnace,
Belt burner hearth is divided into cloth area, preheating zone, mends wind anallobar, middle warm area, high-temperature region and discharge zone by barricade successively, on the one hand
The temperature in each region can be kept, the dust in cloth area and the flue dust of discharge zone on the one hand can be avoided to enter roasting region, simultaneously
It can ensure the not mutual crossfire of leaded zinc flue gas of the flue gas containing arsenic trioxide and middle warm area of preheating zone, the product both so as to ensure
Matter, while by mending arrangement benefit wind supercharging burner in wind anallobar, it is blown into a large amount of high temperature airs in roasting so that the region
Air pressure higher than preheating zone and middle warm area, by air pressure and barricade, can by preheating zone and the flue gas strict separation of middle warm area, so as to
It is further ensured that the quality of flue gas containing arsenic trioxide and leaded zinc flue gas.It can be significantly improved containing arsenic using the system as a result,
The high efficiente callback of the valuable metals such as arsenic, zinc, lead and copper in flue dust, so as to fulfill the recycling of arsenic-containing smoke dust.
In addition, can also be had according to the system of the processing arsenic-containing smoke dust of the utility model above-described embodiment following additional
Technical characteristic：
Optional, the system of above-mentioned processing arsenic-containing smoke dust further comprises：Gas-solid separating device, the gas-solid separating device
With leaded zinc smoke inlet, exhanst gas outlet and lead zinc dust outlet, the leaded zinc smoke inlet and the leaded zinc flue gas
Outlet is connected；Acidleach device, the acidleach device have lead zinc dust inlet, sulfuric acid entrance and leaching slurry outlet, the lead
Zinc dust inlet is connected with the lead zinc dust outlet；Equipment for separating liquid from solid, the equipment for separating liquid from solid enter with leaching slurry
Mouth, the outlet of thick lead sulfate and solution of zinc sulfate outlet, the leaching slurry entrance are connected with leaching slurry outlet；Electrolysis dress
It puts, the electrolysis unit has solution of zinc sulfate entrance, electrolysis waste solution outlet and electrolytic zinc outlet, the solution of zinc sulfate entrance
It is connected with solution of zinc sulfate outlet.Thus, it is possible to realize the difference high efficiente callback of lead zinc.
Optional, the system of above-mentioned processing arsenic-containing smoke dust further comprises：Wet mill unit, the wet mill unit have roasting
Product inlet and slurry outlet, the hot product of roasting entrance are connected with the hot product of roasting outlet；Gravity concentration apparatus, institute
Gravity concentration apparatus is stated with ore pulp entrance, the outlet of slag containing arsenic and copper concentrate outlet, the ore pulp entrance with the slurry outlet to be connected.
Thus, it is possible to it recycles to obtain the copper concentrate that copper grade is more than 85%, so as to fulfill the recycling of dust-laden flue dust.
Optional, the cloth area, the preheating zone, the benefit wind anallobar, the middle warm area, the high-temperature region and institute
State discharge zone relative to the angle of the central angle corresponding to the belt burner hearth center of circle be respectively 15~22 degree, 80~140 degree, 0.5~
10 degree, 40~80 degree, 100~160 degree and 15~30 degree.Thus, it is possible to realize effective recycling of copper, arsenic and lead zinc.
The additional aspect and advantage of the utility model will be set forth in part in the description, partly will be from following description
In become apparent or recognized by the practice of the utility model.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the utility model will in the description from combination accompanying drawings below to embodiment
Become apparent and be readily appreciated that, wherein：
Fig. 1 is the system structure diagram according to the processing arsenic-containing smoke dust of the utility model one embodiment；
Fig. 2 is the system structure diagram according to the processing arsenic-containing smoke dust of the utility model further embodiment；
Fig. 3 is the rotary hearth furnace vertical view for handling arsenic-containing smoke dust according to another embodiment of the utility model；
Fig. 4 is the system structure diagram for handling arsenic-containing smoke dust according to another embodiment of the utility model；
Fig. 5 is the side according to the system processing arsenic-containing smoke dust using processing arsenic-containing smoke dust of the utility model one embodiment
Method flow diagram；
Fig. 6 is to handle arsenic-containing smoke dust according to the system using processing arsenic-containing smoke dust of the utility model further embodiment
Method flow schematic diagram；
Fig. 7 is the system processing arsenic-containing smoke dust using processing arsenic-containing smoke dust according to another embodiment of the utility model
Method flow schematic diagram.
Specific embodiment
The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that the utility model
Limitation.
In the description of the present invention, it is to be appreciated that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ",
The orientation or position relationship of the instructions such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " are based on shown in the drawings
Orientation or position relationship are for only for ease of description the utility model and simplify description rather than instruction or imply signified dress
It puts or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that the utility model
Limitation.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature." multiple " are meant that at least two, such as two in the description of the present invention,
It is a, three etc., unless otherwise specifically defined.
In the utility model unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be
Mechanical connection or electrical connection；It can be directly connected, can also be indirectly connected by intermediary, can be two
The interaction relationship of connection or two elements inside element, unless otherwise restricted clearly.For the common skill of this field
For art personnel, concrete meaning of the above-mentioned term in the utility model can be understood as the case may be.
In terms of one of the utility model, the utility model proposes it is a kind of handle arsenic-containing smoke dust system, according to
The embodiment of the utility model, with reference to figure 1, which includes：Mixing device 100, molding machine 200, drying unit 300 and turn
Bottom stove 400.
Embodiment according to the present utility model, mixing device 100 have arsenic-containing smoke dust entrance 101, additive entrance 102,
Reducing agent entrance 103, binding agent entrance 104 and mixed material outlet 105, and suitable for by arsenic-containing smoke dust, additive, reducing agent and
Binding agent carries out mixed processing, to obtain mixed material.Be conducive to arsenic-containing smoke dust and additive, reducing agent and bonding as a result,
Agent is uniformly mixed, abundant so as to fulfill arsenic-containing smoke dust roasting in follow-up rotary hearth furnace.
One embodiment according to the present utility model, arsenic content is not less than not less than 3wt%, copper content in arsenic-containing smoke dust
The total content of 5wt%, zinc and lead is not less than 2wt%.Preferably, more than 50% arsenic in arsenic-containing smoke dust is deposited in the form of an oxide
.This technique is mainly for high-arsenic dust, to reduce enrichment of the arsenic in the products such as lead, zinc, if valuable metal recovery is worth
It is not high, the economy of the technique can be influenced.Be conducive to improve the economy of technique using the arsenic-containing smoke dust of the utility model as a result,
Property.
Further embodiment according to the present utility model, the mixing matter of arsenic-containing smoke dust and additive, reducing agent and binding agent
Amount is than being 100：(15~40)：(10~50)：(0.5~10).Inventor has found that additive decomposes heat absorption, if additive is excessive,
High energy consumption；Additive is very few, then the inhibiting effect volatilized in middle and high warm area to arsenic dies down, and arsenic is easily accessible flue gas, influences lead zinc
The quality of dust.Reducing agent is very few, and the lead, zinc and copper reduction in arsenic-containing smoke dust are insufficient, and the rate of recovery is low；Reducing agent is excessive, makes
Into the waste of reducing agent, cost of material raising.Binding agent is used to improve balling-up and the pellet strength of pelletizing, very few, is unfavorable for
Balling-up, and gained pellet strength is low, it is frangible；Cross at most cost raising.
Another embodiment according to the present utility model, additive can be lime stone, marble, dolomite, calcite,
At least one of aragonite and chalk, wherein, preferably calcite and dolomite.Inventor find, such additive temperature compared with
(less than 700 degrees Celsius) preheating zone is not reacted substantially with arsenic when low, does not interfere with the volatilization of arsenic oxide, and its temperature compared with
(reaching 1000 degrees Celsius) i.e. when high, middle warm area and high-temperature region, decomposable asymmetric choice net goes out calcium oxide, and copper, lead, zinc etc. can be promoted to be reduced to list
Matter, be conducive to subsequent copper, lead and zinc as a result, is separately recovered utilization.
Another embodiment according to the present utility model, reducing agent can be bituminous coal, coking coal, graphite, coal slime, anthracite,
At least one of semi-coke, coke and lignite.Specifically, reducing agent primarily serves the effect of reduction valuable metal, preferably ash content
Content is less than 25wt%.As a result, can by arsenic-containing smoke dust lead, zinc and copper reduction it is abundant, improve the respective rate of recovery.
Another embodiment according to the present utility model, binding agent can be starch, sodium humate, carboxymethyl cellulose
At least one of sodium, pitch, pectin, bentonite, clay, kaolin and red mud.Thus, it is possible to ensure gained molding pelletizing tool
There is higher intensity, so as to suitable for the reduction roasting in rotary hearth furnace.
Embodiment according to the present utility model, molding machine 200 have mixed material entrance 201 and the outlet of molding pelletizing
202, mixed material entrance 201 is connected with mixed material outlet 105, and suitable for mixed material is carried out forming processes, so as to
To molding pelletizing.The contact area of each ingredient in mixed material can be further increased as a result, included so as to improve follow-up rotary hearth furnace
The reaction rate of arsenic flue dust and reducing agent and additive saves rotary hearth furnace energy consumption.It should be noted that those skilled in the art can
To select according to actual needs the particle size for being molded pelletizing.
There is molding pelletizing entrance 301 and dry pelletizing to export for embodiment according to the present utility model, drying unit 300
302, molding pelletizing entrance 301 is connected, and processing is dried suitable for that will be molded pelletizing with molding pelletizing outlet 202, so as to
To dry pelletizing.Specifically, the moisture content of dry pelletizing is less than 0.5wt%, is dried by the way that pelletizing will be molded, pelletizing can be avoided to exist
It bursts in rotary hearth furnace roasting process, ensures roasting effect.
Embodiment according to the present utility model, with reference to figure 1 and Fig. 2, rotary hearth furnace 400 includes：Rotatable stove bottom 41, annular furnace
Thorax 42, the first flue 44, the second flue 45, drawing mechanism 46, mends wind supercharging burner 47, burning burner 48, dry ball at barricade 43
Group's entrance 401, exhanst gas outlet containing arsenic trioxide 402, leaded zinc exhanst gas outlet 403 and hot product of roasting outlet 404.
One embodiment according to the present utility model, along 41 rotation direction of furnace bottom, in the burner hearth 42 that goes in ring by barricade 43 according to
It is secondary to be divided into cloth area 410, preheating zone 420, mend wind anallobar 430, middle warm area 440, high-temperature region 450 and discharge zone 460, thus
As the rotation of ring-shaped furnace bottom is so that step into the drying pelletizing in cloth area successively by preheating zone, benefit wind anallobar, middle warm area, height
Warm area and discharge zone；And in rotary hearth furnace, belt burner hearth is divided by cloth area, preheating zone using barricade successively, mends wind increasing
On the one hand pressure area, middle warm area, high-temperature region and discharge zone can keep the temperature in each region, on the one hand can avoid the ash in cloth area
Dirt and the flue dust of discharge zone enter roasting region, while can ensure preheating zone flue gas containing arsenic trioxide and middle warm area it is leaded
The not mutual crossfire of zinc flue gas, the quality both so as to ensure.
Further embodiment according to the present utility model, the first flue 44 are arranged in preheating zone 420.Specifically, preheating
Qu Zhong, the part arsenic trioxide dried in pelletizing are volatized into flue gas, while the part arsenic and five under the action of reducing agent
Two arsenic are aoxidized, be reduced into arsenic trioxide and are volatized into flue gas, rotary hearth furnace, arsenic trioxide are pulled out out by the first flue
Removal rate not less than 90%, the remaining arsenic for being difficult to restore abjection and lead, zinc mend wind supercharging as pelletizing enters in this region
Area；And the first flue can be arranged on the side wall of preheating zone.
Another embodiment according to the present utility model, the second flue 45 are arranged in middle warm area 440.Specifically, in medium temperature
Area and the Ca that in high-temperature region, with the raising of temperature, additive starts to react with arsenic, and generation chemical property is stablized3
(AsO4)2, arsenic remained in slag, the harmless treatment to arsenical is realized, while under the action of additive, in pelletizing
Lead, zinc compound be reduced, formed lead zinc volatile matter enter in flue gas, rotary hearth furnace is pulled out out by the second flue, is realized
It is efficiently separated with other substances in pelletizing, copper is with a variety of shapes such as sulfate, oxide, arsenate, sulfide, metal in flue dust
Formula exists, and in roasting, various forms of copper can be reduced into copper simple substance under the action of additive and reducing agent；And the
Two flues can be arranged on the side wall of middle warm area.
Another embodiment according to the present utility model, drawing mechanism 46 are arranged in discharge zone 460, so as to which be conducive to must
To hot product of roasting smoothly discharge rotary hearth furnace.
Another embodiment according to the present utility model mends wind supercharging burner 47 and is arranged in benefit wind anallobar 430.Specifically
, it mends wind anallobar and respectively blows back the flue gas containing arsenic trioxide of preheating zone and the leaded zinc flue gas in high temperature area, separate
Coming, flue gas is avoided mutually to pollute, while mend wind anallobar as oxidizing atmosphere, the arsenic that residue is difficult to restore to abjection aoxidizes,
It retightens in pelletizing.
Another embodiment according to the present utility model, fuel burner nozzle 48 are arranged in preheating zone 420, middle warm area 440 and height
Warm area 450, so as to can while spray into air and fuel gas into burner hearth by fuel burner nozzle, burning generates flame, so as to add
Thermal bake-out material.
Another embodiment according to the present utility model, dry pelletizing entrance 401 are arranged in cloth area 410, and dry
Pelletizing entrance 401 is connected, and with dry pelletizing outlet 302 suitable for supplying the drying pelletizing that drying device obtains to rotary hearth furnace cloth
Expect area.
Another embodiment according to the present utility model, exhanst gas outlet containing arsenic trioxide 402 be arranged in preheating zone 420 and
It is connected with the first flue 44, and suitable for the oxygen containing arsenic trioxide collected through the first flue is discharged rotary hearth furnace.
Another embodiment according to the present utility model, leaded zinc exhanst gas outlet 403 are arranged in middle warm area 440 and with second
Flue 45 is connected, and suitable for the leaded zinc flue gas collected through the second flue is discharged rotary hearth furnace.
Another embodiment according to the present utility model, hot product of roasting outlet 404 are arranged in discharge zone 460, and suitable
In by obtained hot product of roasting discharge rotary hearth furnace.
Another embodiment according to the present utility model, cloth area fabric thickness are 10-50mm.Inventor has found, if material
Layer is blocked up, and the heat that can be influenced between the bed of material is transmitted so that bottom pelletizing slow temperature of being heated is low, causes pellet roasting incomplete, shadow
Ring roasting effect.
Another embodiment according to the present utility model, cloth area, preheating zone, mend wind anallobar, middle warm area, high-temperature region and
Discharge zone relative to the angle of the central angle corresponding to the belt burner hearth center of circle is respectively 15~22 degree, 80~140 degree, 0.5~10
It spends, 40~80 degree, 100~160 degree and 15~30 degree.Inventor has found that if, cloth area angle too small, spatial position is narrow, no
Uniform distribution is carried out conducive to distributing device is placed, angle is excessive, causes space waste.If preheating zone angle too small, during material stop
Between it is short, arsenic volatilization is incomplete, and angle is excessive, and arsenic has volatilized completely, causes the waste spatially and thermally measured.If mend wind anallobar angle
Spend small, then the gas barrier operation on preheating zone and middle and high warm area both sides is difficult to control, and angle is excessive, causes spatially and thermally to measure
Waste.Middle warm area is mainly used for the metals such as roasting reduction lead, zinc and copper with high-temperature region, if high-temperature region angle too small, metal
Reduction is incomplete, and the rate of recovery is low, and angle is excessive, causes space waste；If middle warm area angle too small, the material heating-up time is too short,
Heating rate is limited, can not be connected high-temperature area, causes high-temperature area temperature low, and reduction is insufficient.Discharge zone angular dimension is determined
Fixed whether to facilitate discharging, angle is excessive, causes the waste spatially and thermally measured.
Another embodiment according to the present utility model, the temperature of preheating zone can be 350~700 degrees Celsius, middle warm area
Temperature can be 700~1000 degrees Celsius, the temperature of high-temperature region can be 1000~1180 degrees Celsius.Inventor's discovery, if
Preheating zone temperature is excessively high, and lead zinc easily forms volatile matter and enters flue gas, pollutes arsenic trioxide dust, the too low then arsenic volatilization of temperature is not
Completely, cause the arsenic trioxide rate of recovery low.If middle warm area and the temperature of high-temperature region are too low, reduction is incomplete, copper, lead and zinc
The rate of recovery it is low, temperature is excessively high, then causes the waste of energy.
Another embodiment according to the present utility model, the air pressure of preheating zone is -5~50Pa, mends the air pressure of wind anallobar
For 200-2000Pa, the air pressure of middle warm area is -5~50Pa.Inventor has found that the air pressure ratio of preheating zone and middle warm area mends wind supercharging
The air pressure in area is low, conveniently flue gas containing arsenic trioxide and leaded zinc flue gas smoothly can exclude rotary hearth furnace respectively, avoid excessive and random
Channel to other regions.If the air pressure for mending wind anallobar is too low, the flue gas of preheating zone and middle warm area can not be completely cut off, cause Gas phase Smoke
Mutually pollute and then influence the quality of recovered flue gas；And if the air pressure for mending wind anallobar is excessively high, easily blows pelletizing, rolls into furnace bottom
In water sealed tank.
According to the system of the processing arsenic-containing smoke dust of the utility model embodiment by by arsenic-containing smoke dust, additive, reducing agent
It is molded and is dried successively after being mixed with binding agent, and gained drying pelletizing is supplied to rotary hearth furnace, in rotary hearth furnace,
Belt burner hearth is divided into cloth area, preheating zone, mends wind anallobar, middle warm area, high-temperature region and discharge zone by barricade successively, on the one hand
The temperature in each region can be kept, the dust in cloth area and the flue dust of discharge zone on the one hand can be avoided to enter roasting region, simultaneously
It can ensure the not mutual crossfire of leaded zinc flue gas of the flue gas containing arsenic trioxide and middle warm area of preheating zone, the product both so as to ensure
Matter, while by mending arrangement benefit wind supercharging burner in wind anallobar, it is blown into a large amount of high temperature airs in roasting so that the region
Air pressure higher than preheating zone and middle warm area, by air pressure and barricade, can by preheating zone and the flue gas strict separation of middle warm area, so as to
It is further ensured that the quality of flue gas containing arsenic trioxide and leaded zinc flue gas.It can be significantly improved containing arsenic using the system as a result,
The high efficiente callback of the valuable metals such as arsenic, zinc, lead and copper in flue dust, so as to fulfill the recycling of arsenic-containing smoke dust.
Embodiment according to the present utility model, with reference to figure 3, the system of above-mentioned processing arsenic-containing smoke dust further comprises：Gas-solid
Separator 500, acidleach device 600, equipment for separating liquid from solid 700 and electrolysis unit 800.
Embodiment according to the present utility model, gas-solid separating device 500 have leaded zinc smoke inlet 501, exhanst gas outlet
502 and lead zinc dust outlet 503, leaded zinc smoke inlet 501 be connected with leaded zinc exhanst gas outlet 403, and suitable for by above-mentioned turn
The leaded zinc flue gas that bottom stove middle warm area and high-temperature region obtain carries out gas solid separation, to obtain flue gas and lead zinc powder dirt.Specifically,
Gas-solid separating device can be bagroom, and lead zinc mainly exists in the form of oxide and sulfate in lead zinc powder dirt, production
Product purity is higher, and impurity content is less than 2wt%, and arsenic content is less than 0.05wt%.
Embodiment according to the present utility model, acidleach device 600 have lead zinc dust inlet 601, sulfuric acid entrance 602 and leaching
Go out serum outlet 603, lead zinc dust inlet 601 is connected with lead zinc dust outlet 503, and suitable for sulfuric acid and lead zinc powder dirt are carried out
Acidleach is handled, to obtain leaching slurry.Inventor has found, because lead zinc powder dirt degree of purity is higher, so during using sulfuric acid dissolution,
Zinc leaching rate is up to more than 99%, so as to be advantageously implemented the high efficiente callback of lead and zinc.
One embodiment according to the present utility model, the liquid-solid ratio of sulfuric acid and lead zinc powder dirt are not particularly restricted, ability
The technical staff in domain can be selected according to actual needs, a specific embodiment according to the present utility model, sulfuric acid and lead
The liquid-solid ratio of zinc powder dirt can be (1.5-5)：1.Inventor has found, if the liquid-solid ratio of sulfuric acid and lead zinc powder dirt is high, the leaching of zinc
Rate is fast, but the solution of zinc sulfate of gained is diluter；And if sulfuric acid is low with the liquid-solid ratio of lead zinc powder dirt, leaches the required time more
It is long, reduce production efficiency.
Further embodiment according to the present utility model, the temperature of acidleach processing is 10-35 degrees Celsius, time 20-
100min.Inventor has found that the temperature that acidleach is handled is high, then corrosion is big, and temperature is low then to be leached slowly.Extraction time is too short, leaches
Not exclusively, the rate of recovery and the quality of lead sulfate product are influenced, overlong time then leaches and completed, influences production efficiency.
There is leaching slurry entrance 701, thick lead sulfate to go out for embodiment according to the present utility model, equipment for separating liquid from solid 700
Mouth 702 and solution of zinc sulfate outlet 703, leaching slurry entrance 701 are connected with leaching slurry outlet 603, and suitable for that will leach slurry
Liquid carries out solid-liquid separation treatment, to obtain thick lead sulfate and solution of zinc sulfate.Inventor has found that when acidleach is made molten using sulfuric acid
Agent, zinc are enriched in the form of zinc sulfate in solution, and lead is enriched in the form of lead sulfate in precipitation, can be distinguished after separation of solid and liquid
Obtain solution of zinc sulfate and thick lead sulfate solid, and Zn in solution of zinc sulfate2+Content is more than 30g/L, in thick lead sulfate product
PbSO4Content is more than 93%.It should be noted that equipment for separating liquid from solid can be filter press.
There is solution of zinc sulfate entrance 801, electrolysis waste solution to export for embodiment according to the present utility model, electrolysis unit 800
802 and electrolytic zinc outlet 803, solution of zinc sulfate entrance 801 and solution of zinc sulfate outlet 703 be connected, and be suitable for zinc sulfate is molten
Liquid carries out electrolysis processing, to obtain electrolytic zinc and electrolysis waste solution.Hereby it is achieved that the high efficiente callback of zinc.It should be noted that
Those skilled in the art can according to actual needs select the condition of electrolytic process.
Embodiment according to the present utility model, with reference to figure 4, the system of above-mentioned processing arsenic-containing smoke dust further comprises：Wet-milling
Device 900 and gravity concentration apparatus 1000.
Embodiment according to the present utility model, wet mill unit 900 have hot product of roasting entrance 901 and slurry outlet
902, hot product of roasting entrance 901 is connected with hot product of roasting outlet 404, and the hot roasting suitable for will be obtained in rotary hearth furnace
It burns product and carries out wet ground, to obtain ore pulp.
One embodiment according to the present utility model, a concentration of 50-85wt% of ore pulp.Inventor has found that ore pulp is herein
Be conducive to improve grinding efficiency in concentration range, if the excessive concentration of ore pulp, be unfavorable for ore pulp discharging.
Further embodiment according to the present utility model, the granularity of particle is the accounting 70% less than 0.074mm in ore pulp
More than.It is advantageously implemented as a result, and selects copper concentrate subsequently through gravity treatment process.
There is ore pulp entrance 1001, slag containing arsenic to export 1002 and for embodiment according to the present utility model, gravity concentration apparatus 1000
Copper concentrate outlet 1003, ore pulp entrance 1001 is connected with slurry outlet 902, and suitable for ore pulp is carried out re-selection process, so as to
To slag containing arsenic and copper concentrate.Inventor has found, though the copper in flue dust is with sulfate, oxide, arsenate, sulfide, metal etc.
Diversified forms exist, but in roasting, various forms of copper can be reduced into copper simple substance in the effect of additive and reducing agent,
And since copper simple substance proportion is larger, can be efficiently separated by gravity treatment with other impurities, obtain copper essence of the copper grade more than 85%
Ore deposit.
One embodiment according to the present utility model, gravity concentration apparatus can be shaking table, chute, spiral concentrator or centrifugation choosing
Ore deposit machine, preferably centrifugal ore separator, and the speed of gravity treatment can be 300-800r/min.Be conducive to improve copper concentrate as a result,
Reselection efficiency.
Embodiment according to the present utility model, the utility model proposes processing arsenic-containing smoke dust system at least have it is following
One of described advantage：
According to the system of the processing arsenic-containing smoke dust of the utility model embodiment, it is valuable that the extremely low high-quality containing arsenic can be obtained
Metal product, while arsenic resource can be recycled again；
According to the system of the processing arsenic-containing smoke dust of the utility model embodiment, arsenic-containing smoke dust is handled by using rotary hearth furnace,
Lead product can be directly obtained, without leached mud return smelting system to be influenced to the treating capacity of smelting system；
According to the system of the processing arsenic-containing smoke dust of the utility model embodiment, overcome in " wet method+pyrogenic process " process integration
Arsenic leaching rate is low, the shortcomings that need to constantly being recycled in smelting system, is truly realized efficiently separating, and right for arsenic and valuable metal
Arsenic has carried out open circuit harmless treatment；
According to the system of the processing arsenic-containing smoke dust of the utility model embodiment, copper is recycled in the form of elemental copper, and
The rate of recovery is high, and economic benefit is apparent；
According to the system of the processing arsenic-containing smoke dust of the utility model embodiment, first using pyrometallurgical smelting, degree of purity is isolated
Higher lead zinc powder dirt, then leached using wet method, impure less lead, zinc product are obtained, added value significantly improves；
According to the system of the processing arsenic-containing smoke dust of the utility model embodiment, the lead zinc powder dirt chemical composition letter isolated
It is single, it can efficiently be leached under normal temperature and pressure, overcome and directly leach that needs heat pressurization and leaching rate is not high using smoke raw material
The shortcomings that, the utility model extract technology is easy to operate, and danger coefficient is low.
In order to facilitate understanding, the method for the system processing arsenic-containing smoke dust using above-mentioned processing arsenic-containing smoke dust is carried out below detailed
Thin description, embodiment according to the present utility model, with reference to figure 5, this method includes：
S100：Arsenic-containing smoke dust, additive, reducing agent and binding agent are supplied into mixing device and carry out mixed processing
In the step, arsenic-containing smoke dust, additive, reducing agent and binding agent are supplied into mixing device and carried out at mixing
Reason, to obtain mixed material.Be conducive to arsenic-containing smoke dust as a result, to be uniformly mixed with additive, reducing agent and binding agent, so as to real
Now arsenic-containing smoke dust roasting is abundant in follow-up rotary hearth furnace.
One embodiment according to the present utility model, arsenic content is not less than not less than 3wt%, copper content in arsenic-containing smoke dust
The total content of 5wt%, zinc and lead is not less than 2wt%.Preferably, more than 50% arsenic in arsenic-containing smoke dust is deposited in the form of an oxide
.This technique is mainly for high-arsenic dust, to reduce enrichment of the arsenic in the products such as lead, zinc, if valuable metal recovery is worth
It is not high, the economy of the technique can be influenced.Be conducive to improve the economy of technique using the arsenic-containing smoke dust of the utility model as a result,
Property.
Further embodiment according to the present utility model, the mixing matter of arsenic-containing smoke dust and additive, reducing agent and binding agent
Amount is than being 100：(15~40)：(10~50)：(0.5-10).Inventor has found that additive decomposes heat absorption, if additive is excessive,
High energy consumption, additive is very few, then the inhibiting effect volatilized in middle and high warm area to arsenic dies down, and arsenic is easily accessible flue gas, influences lead zinc
The quality of dust.Reducing agent is very few, and the lead, zinc and copper reduction in arsenic-containing smoke dust are insufficient, and the rate of recovery is low；Reducing agent is excessive, makes
Into the waste of reducing agent, cost of material raising.Binding agent is used to improve balling-up and the pellet strength of pelletizing, very few, is unfavorable for
Balling-up, and gained pellet strength is low, it is frangible；Cross at most cost raising.
Another embodiment according to the present utility model, additive can be lime stone, marble, dolomite, calcite,
At least one of aragonite and chalk, wherein, preferably calcite and dolomite.Inventor find, such additive temperature compared with
(less than 700 degrees Celsius) preheating zone is not reacted substantially with arsenic when low, does not interfere with the volatilization of arsenic oxide, and its temperature compared with
(reaching 1000 degrees Celsius) i.e. when high, middle warm area and high-temperature region, decomposable asymmetric choice net goes out calcium oxide, and copper, lead, zinc etc. can be promoted to be reduced to list
Matter, be conducive to subsequent copper, lead and zinc as a result, is separately recovered utilization.
Another embodiment according to the present utility model, reducing agent can be bituminous coal, coking coal, graphite, coal slime, anthracite,
At least one of semi-coke, coke and lignite.Specifically, reducing agent primarily serves the effect of reduction valuable metal, preferably ash content
Content is less than 25wt%.As a result, can by arsenic-containing smoke dust lead, zinc and copper reduction it is abundant, improve the respective rate of recovery.
Another embodiment according to the present utility model, binding agent can be starch, sodium humate, carboxymethyl cellulose
At least one of sodium, pitch, pectin, bentonite, clay, kaolin and red mud.Thus, it is possible to ensure gained molding pelletizing tool
There is higher intensity, so as to suitable for the reduction roasting in rotary hearth furnace.
S200：Mixed material is supplied into molding machine and carries out forming processes
In the step, mixed material is supplied into molding machine and carries out forming processes, to obtain molding pelletizing.By
This, can further increase the contact area of each ingredient in mixed material, so as to improve arsenic-containing smoke dust and reduction in follow-up rotary hearth furnace
Agent and the reaction rate of additive save rotary hearth furnace energy consumption.It should be noted that those skilled in the art can be according to practical need
The particle size for being molded pelletizing is selected.
S300：Molding pelletizing is supplied, processing is dried into drying unit
In the step, molding pelletizing is supplied, processing is dried into drying unit, to obtain dry pelletizing.Specifically
, the moisture content of dry pelletizing is less than 0.5wt%, is dried by that will be molded pelletizing, can avoid pelletizing in rotary hearth furnace roasting process
It is middle to burst, ensure roasting effect.
S400：Dry pelletizing is supplied to the cloth area of rotary hearth furnace, and as the rotation of ring-shaped furnace bottom is successively by preheating
Wind anallobar, middle warm area, high-temperature region and discharge zone are mended by area
In the step, dry pelletizing is supplied to the cloth area of rotary hearth furnace, and pass through successively with the rotation of ring-shaped furnace bottom
Wind anallobar, middle warm area, high-temperature region and discharge zone are mended in preheating zone, obtain flue gas containing arsenic trioxide, leaded zinc flue gas and hot
Product of roasting.Specifically, dry pelletizing enters rotary hearth furnace by cloth area, in preheating zone, the part three in dry pelletizing aoxidizes
Two arsenic are volatized into flue gas, while part arsenic and diarsenic pentoxide under the action of reducing agent, are reduced into arsenic trioxide
And flue gas is volatized into, rotary hearth furnace is pulled out out by the first flue, the removal rate of arsenic trioxide is not less than 90%, in this region
Interior residue is difficult to restore the arsenic of abjection and lead, zinc mend wind anallobar as pelletizing enters, and mends wind anallobar and preheating zone is contained three
It aoxidizes two arsenic flue gases and the leaded zinc flue gas in high temperature area is respectively blown back, separate, flue gas is avoided mutually to pollute, while mend wind
Anallobar is oxidizing atmosphere, and the arsenic that residue is difficult to restore to abjection aoxidizes, and retightens in pelletizing；In middle warm area and height
In warm area, with the raising of temperature, additive starts to react with arsenic, the Ca that generation chemical property is stablized3(AsO4)2, arsenic is residual
It staying in slag, realizes the harmless treatment to arsenical, while under the action of additive, lead, zinc compound are reduced,
It forms lead zinc volatile matter to enter in flue gas, rotary hearth furnace is pulled out out by the second flue, realizing has with other substances in pelletizing
Effect separation；Copper exists with diversified forms such as sulfate, oxide, arsenate, sulfide, metals in flue dust, different in roasting
The copper of form can be reduced into copper simple substance in the effect of additive and reducing agent.Thus, it can be achieved that copper, arsenic and lead zinc it is effective
Separation.
One embodiment according to the present utility model, cloth area fabric thickness are 10-50mm.Inventor has found, if the bed of material
Blocked up, the heat that can be influenced between the bed of material is transmitted so that bottom pelletizing slow temperature of being heated is low, causes pellet roasting incomplete, influences
Roasting effect.
Further embodiment according to the present utility model, the temperature of preheating zone can be 350~700 degrees Celsius, middle warm area
Temperature can be 700~1000 degrees Celsius, the temperature of high-temperature region can be 1000~1180 degrees Celsius.Inventor's discovery, if
Preheating zone temperature is excessively high, and lead zinc easily forms volatile matter and enters flue gas, pollutes arsenic trioxide dust, the too low then arsenic volatilization of temperature is not
Completely, cause the arsenic trioxide rate of recovery low.If middle warm area and the temperature of high-temperature region are too low, reduction is incomplete, copper, lead and zinc
The rate of recovery it is low, temperature is excessively high, then causes the waste of energy.
Another embodiment according to the present utility model, the air pressure of preheating zone is -5~50Pa, mends the air pressure of wind anallobar
For 200-2000Pa, the air pressure of middle warm area is -5~50Pa.Inventor has found that the air pressure ratio of preheating zone and middle warm area mends wind supercharging
The air pressure in area is low, conveniently flue gas containing arsenic trioxide and leaded zinc flue gas smoothly can exclude rotary hearth furnace respectively, avoid excessive and random
Channel to other regions.If the air pressure for mending wind anallobar is too low, the flue gas of preheating zone and middle warm area can not be completely cut off, cause Gas phase Smoke
Mutually pollute and then influence the quality of recovered flue gas；And if the air pressure for mending wind anallobar is excessively high, easily blows pelletizing, rolls into furnace bottom
In water sealed tank.
According to the utility model embodiment using the method for the system processing arsenic-containing smoke dust of processing arsenic-containing smoke dust pass through by
It is molded and is dried successively after arsenic-containing smoke dust, additive, reducing agent and binding agent mixing, and gained drying pelletizing is supplied
To rotary hearth furnace, in rotary hearth furnace, belt burner hearth is divided into cloth area, preheating zone, mends wind anallobar, medium temperature by barricade successively
On the one hand area, high-temperature region and discharge zone can keep the temperature in each region, on the one hand can avoid dust and the discharge zone in cloth area
Flue dust enter roasting region, while can ensure the leaded zinc flue gas of the flue gas containing arsenic trioxide of preheating zone and middle warm area not phase
Mutual crossfire, the quality both so as to ensure, while by mending arrangement benefit wind supercharging burner in wind anallobar, be blown into roasting
A large amount of high temperature airs so that the air pressure in the region is higher than preheating zone and middle warm area, can be by preheating zone in by air pressure and barricade
The flue gas strict separation of warm area, so as to be further ensured that the quality of flue gas containing arsenic trioxide and leaded zinc flue gas.It uses as a result,
This method can significantly improve the high efficiente callback of the valuable metals such as arsenic in arsenic-containing smoke dust, zinc, lead and copper, so as to fulfill arsenic-containing smoke dust
Recycling.
Embodiment according to the present utility model, with reference to figure 6, containing arsenic, your method of flue dust further comprises for above-mentioned processing：
S500：Leaded zinc flue gas is supplied to gas-solid separating device and carries out gas solid separation
In the step, the leaded zinc flue gas that above-mentioned rotary hearth furnace middle warm area and high-temperature region obtain is supplied to gas-solid separating device
Gas solid separation is carried out, to obtain flue gas and lead zinc powder dirt.Specifically, gas-solid separating device can be bagroom, lead zinc
Lead zinc mainly exists in the form of oxide and sulfate in dust, and product purity is higher, and impurity content is less than 2wt%, and arsenic contains
Amount is less than 0.05wt%.
S600：Sulfuric acid and lead zinc powder dirt are supplied into acidleach device and carry out acidleach processing
In the step, sulfuric acid and lead zinc powder dirt are supplied into acidleach device and carry out acidleach processing, to obtain leaching slurry
Liquid.Inventor has found, because lead zinc powder dirt degree of purity is higher, so during using sulfuric acid dissolution, zinc leaching rate is up to more than 99%, from
And it is advantageously implemented the high efficiente callback of lead and zinc.
One embodiment according to the present utility model, the liquid-solid ratio of sulfuric acid and lead zinc powder dirt are not particularly restricted, ability
The technical staff in domain can be selected according to actual needs, a specific embodiment according to the present utility model, sulfuric acid and lead
The liquid-solid ratio of zinc powder dirt can be (1.5-5)：1.Inventor has found, if the liquid-solid ratio of sulfuric acid and lead zinc powder dirt is high, the leaching of zinc
Rate is fast, but the solution of zinc sulfate of gained is diluter；And if sulfuric acid is low with the liquid-solid ratio of lead zinc powder dirt, leaches the required time more
It is long, reduce production efficiency.
Further embodiment according to the present utility model, the temperature of acidleach processing is 10-35 degrees Celsius, time 20-
100min.Inventor has found that the temperature that acidleach is handled is high, then corrosion is big, and temperature is low then to be leached slowly.Extraction time is too short, leaches
Not exclusively, the rate of recovery and the quality of lead sulfate product are influenced, overlong time then leaches and completed, influences production efficiency.
S700：Leaching slurry is supplied into equipment for separating liquid from solid and carries out solid-liquid separation treatment
In the step, leaching slurry is supplied into equipment for separating liquid from solid and carries out solid-liquid separation treatment, to obtain thick sulphur
Lead plumbate and solution of zinc sulfate.Inventor has found, makees solvent using sulfuric acid during acidleach, zinc is enriched in solution in the form of zinc sulfate
In, lead is enriched in the form of lead sulfate in precipitation, and solution of zinc sulfate and thick lead sulfate solid can be respectively obtained after separation of solid and liquid,
And Zn in solution of zinc sulfate2+Content is more than 30g/L, PbSO in thick lead sulfate product4Content is more than 93%.It should be noted that
Equipment for separating liquid from solid can be filter press.
S800：Solution of zinc sulfate is supplied into electrolysis unit and carries out electrolysis processing
In the step, solution of zinc sulfate is supplied into electrolysis unit and carries out electrolysis processing, to obtain electrolytic zinc and electricity
Liquid waste solution.Hereby it is achieved that the high efficiente callback of zinc.It should be noted that those skilled in the art can be right according to actual needs
The condition of electrolytic process is selected.
Embodiment according to the present utility model, with reference to figure 7, containing arsenic, your method of flue dust further comprises for above-mentioned processing：
S900：Hot product of roasting is supplied into wet mill unit and carries out wet ground
In the step, hot product of roasting is supplied into wet mill unit and carries out wet ground, to obtain ore pulp.
One embodiment according to the present utility model, a concentration of 50-85wt% of ore pulp.Inventor has found that ore pulp is herein
Be conducive to improve grinding efficiency in concentration range, if the excessive concentration of ore pulp, be unfavorable for ore pulp discharging.
Further embodiment according to the present utility model, in ore pulp the granularity of particle for the accounting 70% less than 0.074 with
On.It is advantageously implemented as a result, and selects copper concentrate subsequently through gravity treatment process.
S1000：Ore pulp is supplied into gravity concentration apparatus and carries out re-selection process
In the step, ore pulp is supplied into gravity concentration apparatus and carries out re-selection process, to obtain slag containing arsenic and copper concentrate.Hair
A person of good sense has found, though the copper in flue dust exists with diversified forms such as sulfate, oxide, arsenate, sulfide, metals, is roasting
During burning, various forms of copper can be reduced into copper simple substance in the effect of additive and reducing agent, and due to copper simple substance proportion compared with
Greatly, it can be efficiently separated by gravity treatment with other impurities, obtain the copper concentrate that copper grade is more than 85%.
One embodiment according to the present utility model, gravity concentration apparatus can be shaking table, chute, spiral concentrator or centrifugation choosing
Ore deposit machine, preferably centrifugal ore separator, and the speed of gravity treatment can be 300-800r/min.Be conducive to improve copper concentrate as a result,
Reselection efficiency.
Below with reference to specific embodiment, the utility model is described, it should be noted that these embodiments are only
Descriptive, without limiting the utility model in any way.
Embodiment 1
Arsenic-containing smoke dust (7.71wt% containing Cu, Pb 5.13wt%, Zn 2.11wt%, AS 8.24wt%) will be smelted, added
Add agent (calcite), reducing agent (semi-coke, containing ash content 10wt%), binding agent (bentonite+starch solution), by weight ratio 100：
40：25：10 carry out dispensing；Molding pelletizing is prepared after mixed material mixing；Molding pelletizing dries to obtain moisture content less than 0.5wt%
Drying pelletizing, be then sent in rotary hearth furnace cloth area and carry out cloth, fabric thickness 50mm, and with ring-shaped furnace bottom
Rotation is successively by preheating zone, benefit wind anallobar, middle warm area, high-temperature region and discharge zone, time 80min.Wherein, cloth area, pre-
The angle point of wind anallobar, middle warm area, high-temperature region and discharge zone relative to the central angle corresponding to the belt burner hearth center of circle is mended in hot-zone
Wei not be 15 degree, 80 degree, 10 degree, 80 degree, 160 degree and 15 degree, the temperature of preheating zone is 500~650 degrees Celsius, the temperature of middle warm area
It it is 650~900 degrees Celsius, the temperature of high-temperature region is 900~1150 degrees Celsius, and the temperature of discharge zone is 750 degrees Celsius, preheating zone
Air pressure for -5Pa, the air pressure for mending wind anallobar is 200Pa, and the air pressure of middle warm area is -5Pa, and the air pressure of high-temperature region is 0Pa.Turn
Bottom stove roasting system such as table 1.
Collect containing As from the first flue of rotary hearth furnace2O3The arsenic trioxide dust of 94.46wt%, from the second cigarette of rotary hearth furnace
Collect to obtain lead zinc powder dirt, hot product of roasting meter lead removal efficiency 91.16%, zinc removal efficiency 93.76% in road.
Lead zinc powder dirt is leached using sulfuric acid, and the temperature of leaching process is 10-35 degrees Celsius, and the time is about 80min, liquid
Gu than being (1.5-5)：1, separation of solid and liquid obtains filter residue and filtrate, and filter residue is eluted again, obtains leacheate and thick lead sulfate, leaching
Washing lotion, which returns, leaches process for leaching.For solution of zinc sulfate in filtrate, filter residue meter zinc operation leaching rate is up to 99.03%, sulfuric acid
Zinc solution can obtain electrolytic zinc and electrolysis waste solution through electrolysis again.
Water quenching after hot product of roasting discharge rotary hearth furnace, carries out wet grinding.Pulp density is 75wt% during ore grinding, is obtained
Granularity accounts for more than 90% ore pulp for below 0.074mm, and ore pulp is sorted using centrifugal ore separator, rotating speed 300r/min,
Obtain copper concentrate and slag containing arsenic, copper concentrate cupric 94.64%, copper overall recovery is up to 90.41%.
1 rotary hearth furnace of table roasting system (one)
Embodiment 2
Arsenic-containing smoke dust (7.71wt% containing Cu, Pb 5.13wt%, Zn 2.11wt%, AS 8.24wt%) will be smelted, added
Add agent (nepheline), reducing agent (anthracite, containing ash content 15wt%), binding agent (sodium humate), by weight ratio 100：15：35：3
Carry out dispensing；Molding pelletizing is prepared after mixed material mixing；Molding pelletizing dries to obtain the dry ball that moisture content is less than 0.5wt%
Then group is sent in rotary hearth furnace cloth area and carries out cloth, fabric thickness 10mm, and with ring-shaped furnace bottom rotation successively
By preheating zone, mend wind anallobar, middle warm area, high-temperature region and discharge zone, time 120min.Wherein, cloth area, preheating zone, benefit
Wind anallobar, middle warm area, high-temperature region and discharge zone are respectively relative to the angle of the central angle corresponding to the belt burner hearth center of circle
17.5 degree, 140 degree, 0.5 degree, 80 degree, 100 degree and 22 degree, the temperature of preheating zone is 350~600 degrees Celsius, the temperature of middle warm area
It it is 600~900 degrees Celsius, the temperature of high-temperature region is 1000~1100 degrees Celsius, and the temperature of discharge zone is 650 degrees Celsius, preheating
The air pressure in area is 0Pa, and the air pressure for mending wind anallobar is 600Pa, and the air pressure of middle warm area is 0Pa, and the air pressure of high-temperature region is 10Pa.Turn
Bottom stove roasting system such as table 2.
Collect containing As from the first flue of rotary hearth furnace2O3The arsenic trioxide dust of 98.05wt%, from the second cigarette of rotary hearth furnace
Collect to obtain lead zinc powder dirt, hot product of roasting meter lead removal efficiency 92.98%, zinc removal efficiency 96.22% in road.
Lead zinc powder dirt is leached using sulfuric acid, and the temperature of leaching process is 10-35 degrees Celsius, and the time is about 80min, liquid
Gu than being (1.5-5)：1, separation of solid and liquid obtains filter residue and filtrate, and filter residue is eluted again, obtains leacheate and thick lead sulfate, leaching
Washing lotion, which returns, leaches process for leaching.For solution of zinc sulfate in filtrate, filter residue meter zinc operation leaching rate is up to 99.43%, sulfuric acid
Zinc solution can obtain electrolytic zinc and electrolysis waste solution through electrolysis again.
Water quenching after hot product of roasting discharge rotary hearth furnace, carries out wet grinding.Pulp density is 75wt% during ore grinding, is obtained
Granularity accounts for more than 80% ore pulp for below 0.074mm, and ore pulp is sorted using centrifugal ore separator, rotating speed 500r/min,
Obtain copper concentrate and slag containing arsenic, copper concentrate cupric 90.06%, copper overall recovery is up to 94.79%.
2 rotary hearth furnace of table roasting system (two)
Embodiment 3
Arsenic-containing smoke dust (4.99wt% containing Cu, Pb 32.46wt%, Zn 5.11wt%, AS 4wt%), addition will be smelted
Agent (dolomite), reducing agent (graphite), binding agent (starch), by weight ratio 100：30：10：0.8 carries out dispensing；Mixed material
Molding pelletizing is prepared after mixing；Molding pelletizing dries to obtain the drying pelletizing that moisture content is less than 0.5wt%, is then sent to and turns
Di Lunei clothes area carries out cloth, fabric thickness 30mm, and increases successively by preheating zone, benefit wind with the rotation of ring-shaped furnace bottom
Pressure area, middle warm area, high-temperature region and discharge zone, time 60min.Wherein, cloth area, preheating zone, benefit wind anallobar, middle warm area, height
Warm area and discharge zone relative to the angle of the central angle corresponding to the belt burner hearth center of circle are respectively 20 degree, 100 degree, 10 degree, 40 degree,
160 degree and 30 degree, the temperature of preheating zone is 600~700 degrees Celsius, and the temperature of middle warm area is 700~900 degrees Celsius, high-temperature region
Temperature for 900~1180 degrees Celsius, the temperature of discharge zone is 800 degrees Celsius, and the air pressure of preheating zone is 10Pa, mends wind anallobar
Air pressure for 2000Pa, the air pressure of middle warm area is 10Pa, and the air pressure of high-temperature region is 20Pa.Rotary hearth furnace roasts system such as table 3.
Collect containing As from the first flue of rotary hearth furnace2O3The arsenic trioxide dust of 90.79wt%, from the second cigarette of rotary hearth furnace
Collect to obtain lead zinc powder dirt, hot product of roasting meter lead removal efficiency 91.88%, zinc removal efficiency 94.31% in road.
Lead zinc powder dirt is leached using sulfuric acid, and the temperature of leaching process is 10-35 degrees Celsius, and the time is about 80min, liquid
Gu than being (1.5-5)：1, separation of solid and liquid obtains filter residue and filtrate, and filter residue is eluted again, obtains leacheate and thick lead sulfate, leaching
Washing lotion, which returns, leaches process for leaching.For solution of zinc sulfate in filtrate, filter residue meter zinc operation leaching rate is up to 99.73%, sulfuric acid
Zinc solution can obtain electrolytic zinc and electrolysis waste solution through electrolysis again.
Water quenching after hot product of roasting discharge rotary hearth furnace, carries out wet grinding.Pulp density is 75wt% during ore grinding, is obtained
Granularity accounts for more than 70% ore pulp for below 0.074mm, and ore pulp is sorted using centrifugal ore separator, rotating speed 800r/min,
Obtain copper concentrate and slag containing arsenic, copper concentrate cupric 84.19%, copper overall recovery is up to 91.92%.
3 rotary hearth furnace of table roasting system (three)
In the description of this specification, reference term " one embodiment ", " example ", " is specifically shown " some embodiments "
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with
It combines in an appropriate manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field
Technical staff can by the different embodiments or examples described in this specification and the feature of different embodiments or examples into
Row combines and combination.
Although the embodiment of the utility model has been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it is impossible to be construed as a limitation of the present invention, those of ordinary skill in the art are in the scope of the utility model
It is interior to make changes, modifications, substitutions and variations to the above described embodiments.
Claims (4)
1. a kind of system for handling arsenic-containing smoke dust, which is characterized in that including：
Mixing device, the mixing device have arsenic-containing smoke dust entrance, additive entrance, reducing agent entrance, binding agent entrance and
Mixed material exports；
Molding machine, the molding machine have mixed material entrance and the outlet of molding pelletizing, the mixed material entrance and institute
Mixed material outlet is stated to be connected；
There is molding pelletizing entrance and dry pelletizing to export for drying unit, the drying unit, the molding pelletizing entrance and institute
The outlet of molding pelletizing is stated to be connected；
Rotary hearth furnace, the rotary hearth furnace include：
Rotatable stove bottom；
Annular furnace along the furnace bottom rotation direction, is divided into cloth area, preheating successively by barricade in the belt burner hearth
Wind anallobar, middle warm area, high-temperature region and discharge zone are mended by area；
First flue, first flue are arranged in the preheating zone；
Second flue, second flue are arranged in the middle warm area；
Drawing mechanism, the drawing mechanism are arranged in the discharge zone；
Wind supercharging burner is mended, the benefit wind supercharging burner is arranged in the benefit wind anallobar；
Fuel burner nozzle, the fuel burner nozzle are arranged in the preheating zone, the middle warm area and the high-temperature region；
Dry pelletizing entrance, the dry pelletizing entrance are arranged in the cloth area, and the dry pelletizing entrance with it is described
Dry pelletizing outlet is connected；
Exhanst gas outlet containing arsenic trioxide, the exhanst gas outlet containing arsenic trioxide are arranged in the preheating zone and with described first
Flue is connected；
Leaded zinc exhanst gas outlet, the leaded zinc exhanst gas outlet are arranged in the middle warm area and are connected with second flue；
Hot product of roasting outlet, the hot product of roasting outlet are arranged in the discharge zone.
2. system according to claim 1, which is characterized in that further comprise：
Gas-solid separating device, the gas-solid separating device have leaded zinc smoke inlet, exhanst gas outlet and lead zinc dust outlet, institute
Leaded zinc smoke inlet is stated with the leaded zinc exhanst gas outlet to be connected；
Acidleach device, the acidleach device have lead zinc dust inlet, sulfuric acid entrance and leaching slurry outlet, the lead zinc powder dirt
Entrance is connected with the lead zinc dust outlet；
There is leaching slurry entrance, the outlet of thick lead sulfate and solution of zinc sulfate to go out for equipment for separating liquid from solid, the equipment for separating liquid from solid
Mouthful, the leaching slurry entrance is connected with leaching slurry outlet；
Electrolysis unit, the electrolysis unit have solution of zinc sulfate entrance, electrolysis waste solution outlet and electrolytic zinc outlet, the sulfuric acid
Zinc solution entrance is connected with solution of zinc sulfate outlet.
3. system according to claim 1 or 2, which is characterized in that further comprise：
Wet mill unit, the wet mill unit have hot product of roasting entrance and slurry outlet, the hot product of roasting entrance
It is connected with the hot product of roasting outlet；
Gravity concentration apparatus, the gravity concentration apparatus have ore pulp entrance, the outlet of slag containing arsenic and copper concentrate outlet, the ore pulp entrance and institute
Slurry outlet is stated to be connected.
4. system according to claim 1, which is characterized in that the cloth area, the preheating zone, the benefit wind supercharging
Area, the middle warm area, the high-temperature region and the discharge zone are divided relative to the angle of the central angle corresponding to the belt burner hearth center of circle
It Wei not be 15~22 degree, 80~140 degree, 0.5~10 degree, 40~80 degree, 100~160 degree and 15~30 degree.
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