CN107674981A

CN107674981A - The system and method for handling arsenic-containing smoke dust

Info

Publication number: CN107674981A
Application number: CN201710964778.8A
Authority: CN
Inventors: 陈文亮; 刘占华; 王欣; 丁银贵; 王岩; 曹志成; 汪勤亚; 吴道洪
Original assignee: Jiangsu Province Metallurgical Design Institute Co Ltd
Current assignee: Jiangsu Province Metallurgical Design Institute Co Ltd
Priority date: 2017-10-17
Filing date: 2017-10-17
Publication date: 2018-02-09

Abstract

The invention discloses a kind of system and method for handling arsenic-containing smoke dust, the system includes：Water filtration device for filtering, there is arsenic-containing smoke dust entrance, water inlet, filtrate (liquid and sludge outlet；Mixing device, there is filter residue entrance, additive entrance, reducing agent entrance, binding agent entrance and mixed material outlet；Shaped device, there is mixed material entrance and the outlet of shaping pelletizing；Drying unit, there is shaping pelletizing entrance and dry pelletizing outlet；Rotary hearth furnace, including：Rotatable stove bottom；Annular furnace, along furnace bottom rotation direction, it is divided into cloth area, preheating zone in the burner hearth that goes in ring successively by barricade, mends wind anallobar, middle warm area, high-temperature region and discharge zone；First flue；Second flue；Drawing mechanism；Mend wind supercharging burner；Fuel burner nozzle；Dry pelletizing entrance；Exhanst gas outlet containing arsenic trioxide；Leaded zinc exhanst gas outlet and the outlet of hot product of roasting.

Description

The system and method for handling arsenic-containing smoke dust

Technical field

The invention belongs to metallurgical technology field, and specifically, the present invention relates to the system and method for processing arsenic-containing smoke dust.

Background technology

Flue dust caused by colored metallurgical industrial 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, the disposal ability of stove is reduced, 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 influenceing 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 is handled smelting smoke dust using " wet method+pyrogenic process " process integration more, i.e., first used Water or dilute sulfuric acid leach the valuable elements such as Cu, Zn in cigarette ash, then are reclaimed respectively；Leached mud (main leaded) is used as dispensing Return to the metal such as smelting system, pyrogenic process recovery Pb.Technological process is：The acidleach one of flue dust one is sunk the evaporative crystallization of one iron removaling arsenic of copper one and sunk The white vitriol of zinc one, obtained leached mud send pyrogenic process process to reclaim lead, and copper sponge send copper system to unite, and iron arsenic slag muck is deposited, seven water sulphur 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 residued in leached mud, return to pyrogenic process process again by feed proportioning system, circulation can make Obtain arsenic content in flue dust and be up to 40%-45%, endanger normal production；It is not easy to be immersed because the copper of a part of form is insoluble in acid Go out, residue in leached mud so that copper recovery is down to 60%-65%.

Therefore, the technology of existing processing flue dust is further improved.

The content of the invention

It is contemplated that at least solves one of technical problem in correlation technique to a certain extent.Therefore, the present invention One purpose is to propose a kind of system and method for handling arsenic-containing smoke dust.Using the system can realize arsenic in arsenic-containing smoke dust, The high efficiente callback of the valuable metals such as zinc, lead and copper, so as to realize the recycling of arsenic-containing smoke dust.

In terms of one of the present invention, the present invention proposes a kind of system for handling arsenic-containing smoke dust, according to the present invention's Embodiment, the system include：

There is arsenic-containing smoke dust entrance, water inlet, filtrate (liquid and filter residue to go out for Water filtration device for filtering, the Water filtration device for filtering Mouthful；

Mixing device, the mixing device have filter residue entrance, additive entrance, reducing agent entrance, binding agent entrance and Mixed material exports, and the filter residue entrance is connected with the sludge outlet；

Shaped device, the shaped device have mixed material entrance and the outlet of shaping pelletizing, the mixed material entrance It is connected with mixed material outlet；

Drying unit, the drying unit, which has shaping pelletizing entrance and dries pelletizing, to be exported, the shaping pelletizing entrance It is connected with the shaping pelletizing outlet；

Rotary hearth furnace, the rotary hearth furnace include：

Rotatable stove bottom；

Annular furnace, it is divided into cloth area, pre- successively by barricade along the furnace bottom rotation direction, in the belt burner hearth Hot-zone, mend wind anallobar, middle warm area, high-temperature region and discharge 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 is 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.

The system of processing arsenic-containing smoke dust according to embodiments of the present invention is by the way that the advanced water-filling of arsenic-containing smoke dust is washed, arsenic-containing smoke dust In copper at least 15% be dissolvable in water in water, will then wash gained filter residue, additive, reducing agent and binding agent mix after according to It is secondary to be molded and drying process, and gained drying pelletizing is supplied to rotary hearth furnace, in rotary hearth furnace, barricade by belt burner hearth according to It is secondary to be divided into cloth area, preheating zone, mend wind anallobar, middle warm area, high-temperature region and discharge zone, it on the one hand can keep each region Temperature, the dust in cloth area and the flue dust of discharge zone on the one hand can be avoided to enter roasting region, while containing for preheating zone can be ensured The not mutual crossfire of leaded zinc flue gas of arsenic trioxide flue gas and middle warm area, so as to ensure both qualities, while by mending Arrangement mends wind supercharging burner in wind anallobar, is blown into a large amount of high temperature airs in roasting so that the air pressure in the region is higher than preheating Area and middle warm area, by air pressure and barricade, preheating zone and the flue gas strict separation of middle warm area can be contained three so as to be further ensured that The quality of two arsenic flue gases and leaded zinc flue gas is aoxidized, in middle warm area and high-temperature region (temperature reaches 1000 degrees Celsius), dries pelletizing In the various forms of copper that contain can be reduced into elemental copper in the presence of additive and reducing agent.Thus, using the system The high efficiente callback of the valuable metals such as arsenic in arsenic-containing smoke dust, zinc, lead and copper can be realized, so as to realize the recycling of arsenic-containing smoke dust profit With.

In addition, the system of processing arsenic-containing smoke dust according to the above embodiment of the present invention can also have technology additional as follows Feature：

In some embodiments of the invention, the system of above-mentioned processing arsenic-containing smoke dust further comprises：Granulating unit, it is described Granulating unit expects outlet, the hot product of roasting entrance and the hot roasting after having hot product of roasting entrance and water quenching Product exit is connected；Ore grinding device, the ore grinding device expect entrance and slurry outlet after having water quenching, expect entrance after the water quenching It is connected with material outlet after the water quenching；Gravity concentration apparatus, the gravity concentration apparatus have ore pulp entrance, gravity concentrate outlet and solid arsenic slag Outlet, the ore pulp entrance are connected with the slurry outlet；Leaching device, the leaching device have gravity concentrate entrance, leaching Liquid entrance, copper powder outlet and leachate outlet, the gravity concentrate entrance are connected with gravity concentrate outlet, the leaching Liquid entrance is connected with the filtrate (liquid, and the leachate outlet is connected with the ore grinding device.Thus, can be achieved with elemental copper Form to copper high efficiente callback in arsenic-containing smoke dust.

In some embodiments of the invention, the system of above-mentioned processing arsenic-containing smoke dust further comprises：Arsenic collection device, institute State arsenic collection device to export with smoke inlet containing arsenic trioxide and thick arsenic trioxide, the flue gas containing arsenic trioxide enters Mouth is connected with the exhanst gas outlet containing arsenic trioxide.Thus, can be achieved to reclaim in arsenic-containing smoke dust in the form of arsenic trioxide Most of arsenic.

In some embodiments of the invention, the system of above-mentioned processing arsenic-containing smoke dust further comprises：Bag collection device, The bag collection device has leaded zinc smoke inlet and leaded zinc dust outlet, and the leaded zinc smoke inlet contains with described Lead zinc exhanst gas outlet is connected.Thus, the recovery to lead in arsenic-containing smoke dust and zinc can be achieved.

In some embodiments of the invention, the cloth area, the preheating zone, the benefit wind anallobar, the medium temperature Area, the high-temperature region and the discharge zone are respectively 15~22 relative to the angle of the central angle corresponding to the belt burner hearth center of circle Spend, 80~140 degree, 0.5~10 degree, 40~80 degree, 100~160 degree and 15~30 degree.Thus, it is possible to realize copper, arsenic and lead zinc Effective recovery.

In another aspect of the invention, the present invention, which proposes a kind of system using above-mentioned processing arsenic-containing smoke dust and handled, to be contained The method of arsenic flue dust, according to an embodiment of the invention, this method includes：

(1) arsenic-containing smoke dust and water are supplied into the Water filtration device for filtering and washed and filtration treatment, to obtain Filtrate and filter residue；

(2) filter residue, additive, reducing agent and binding agent are supplied and mixed processing are carried out into the mixing device, To obtain mixed material；

(3) mixed material is supplied and forming processes is carried out into the shaped device, to obtain being molded pelletizing；

(4) the shaping pelletizing is supplied and drying and processing is carried out into the drying unit, to obtain drying pelletizing；

(5) the dry pelletizing is supplied to the cloth area of the rotary hearth furnace, and turned with the ring-shaped furnace bottom It is dynamic to pass through the preheating zone, benefit wind anallobar, the middle warm area, the high-temperature region and the discharge zone successively, so as to To flue gas containing arsenic trioxide, leaded zinc flue gas and hot product of roasting.

The method of processing arsenic-containing smoke dust according to embodiments of the present invention is by the way that the advanced water-filling of arsenic-containing smoke dust is washed, arsenic-containing smoke dust In copper at least 15% be dissolvable in water in water, will then wash gained filter residue, additive, reducing agent and binding agent mix after according to It is secondary to be molded and drying process, and gained drying pelletizing is supplied to rotary hearth furnace, in rotary hearth furnace, barricade by belt burner hearth according to It is secondary to be divided into cloth area, preheating zone, mend wind anallobar, middle warm area, high-temperature region and discharge zone, it on the one hand can keep each region Temperature, the dust in cloth area and the flue dust of discharge zone on the one hand can be avoided to enter roasting region, while containing for preheating zone can be ensured The not mutual crossfire of leaded zinc flue gas of arsenic trioxide flue gas and middle warm area, so as to ensure both qualities, while by mending Arrangement mends wind supercharging burner in wind anallobar, is blown into a large amount of high temperature airs in roasting so that the air pressure in the region is higher than preheating Area and middle warm area, by air pressure and barricade, preheating zone and the flue gas strict separation of middle warm area can be contained three so as to be further ensured that The quality of two arsenic flue gases and leaded zinc flue gas is aoxidized, in middle warm area and high-temperature region (temperature reaches 1000 degrees Celsius), dries pelletizing In the various forms of copper that contain can be reduced into elemental copper in the presence of additive and reducing agent.Thus, using this method The high efficiente callback of the valuable metals such as arsenic in arsenic-containing smoke dust, zinc, lead and copper can be realized, so as to realize the recycling of arsenic-containing smoke dust profit With.

In addition, the method for processing arsenic-containing smoke dust according to the above embodiment of the present invention can also have technology additional as follows Feature：

In some embodiments of the invention, the method for above-mentioned processing arsenic-containing smoke dust further comprises：(6) will be described hot Product of roasting, which supplies, carries out Water Quenching into the granulating unit, to expect after obtaining water quenching；(7) will expect to supply after the water quenching Wet ground is carried out into the ore grinding device, to obtain ore pulp；(8) ore pulp is supplied into the gravity concentration apparatus Re-selection process is carried out, to obtain gravity concentrate and solid arsenic slag；(9) filter for obtaining the gravity concentrate and step (1) Liquid, which supplies, carries out leaching process into the leaching device, to obtain copper powder and leachate, and the leachate is returned The ore grinding device being back in step (7).Thus, can be achieved in the form of elemental copper to copper high efficiente callback in arsenic-containing smoke dust.

In some embodiments of the invention, the method for above-mentioned processing arsenic-containing smoke dust further comprises：(10) contain by described in Arsenic trioxide flue gas, which is supplied into the arsenic collection device, carries out arsenic collection processing, to obtain thick arsenic trioxide.Thus, It can be achieved to reclaim most of arsenic in arsenic-containing smoke dust in the form of arsenic trioxide.

In some embodiments of the invention, the method for above-mentioned processing arsenic-containing smoke dust further comprises：(11) contain by described in Lead zinc flue gas supplies carries out processing of gathering dust into the bag collection device, to obtain leaded zinc powder dirt.Thus, achievable pair The recovery of lead and zinc in arsenic-containing smoke dust.

In some embodiments of the invention, in step (2), the filter residue and the additive, the reducing agent, institute The mixing quality ratio for stating binding agent is 100：(15~40)：(15~33)：(0.1~5).Thus, it is possible to realize copper, arsenic and lead zinc Effective recovery.

The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description Obtain substantially, or recognized by the practice of the present invention.

Brief description of the drawings

The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment Substantially and it is readily appreciated that, wherein：

Fig. 1 is the system structure diagram of processing arsenic-containing smoke dust according to an embodiment of the invention；

Fig. 2 is the rotary hearth furnace top view of processing arsenic-containing smoke dust according to an embodiment of the invention；

Fig. 3 is the system structure diagram according to the processing arsenic-containing smoke dust of further embodiment of the present invention；

Fig. 4 is the system structure diagram according to the processing arsenic-containing smoke dust of another embodiment of the invention；

Fig. 5 is the system structure diagram according to the processing arsenic-containing smoke dust of another embodiment of the invention；

Fig. 6 is the method flow schematic diagram of processing arsenic-containing smoke dust according to an embodiment of the invention；

Fig. 7 is the method flow schematic diagram according to the processing arsenic-containing smoke dust of further embodiment of the present invention；

Fig. 8 is the method flow schematic diagram according to the processing arsenic-containing smoke dust of another embodiment of the invention；

Fig. 9 is the method flow schematic diagram according to the processing arsenic-containing smoke dust of another embodiment of the invention.

Embodiment

Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.

In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " up time The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or Position relationship, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply that signified device or element must There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.

In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three It is individual etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc. Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects Connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be in two elements The connection in portion or the interaction relationship of two elements, limited unless otherwise clear and definite.For one of ordinary skill in the art For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

In terms of one of the present invention, the present invention proposes a kind of system for handling arsenic-containing smoke dust, according to the present invention's Embodiment, with reference to figure 1, the system includes：Water filtration device for filtering 100, mixing device 200, shaped device 300, drying unit 400 With rotary hearth furnace 500.

According to an embodiment of the invention, Water filtration device for filtering 100 has arsenic-containing smoke dust entrance 101, water inlet 102, filtrate Outlet 103 and sludge outlet 104, and suitable for arsenic-containing smoke dust and water are washed and filtration treatment, to obtain filtrate and filter Slag.Specifically, arsenic-containing smoke dust is added into water stirring pulping at normal temperatures first, and the mass concentration of slurries is controlled in 30%- 75%, part soluble copper ion-solubility is in slurries in arsenic-containing smoke dust, after slurries stirring a period of time, press filtration can obtain filtrate and Filter residue, if cupric is less than 2g/L in filtrate, filtrate is returned and is repeatedly used for washing, until copper ion concentration reaches in filtrate 2g/L。

According to one embodiment of present invention, arsenic content is not less than 3wt% in arsenic-containing smoke dust, and copper content is not less than 10wt%, and the copper in arsenic-containing smoke dust at least 15% is dissolvable in water in water.Preferably, the arsenic more than 50% in arsenic-containing smoke dust is with oxygen Compound form is present.Specifically, 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 value is not high, can influence the economy of the technique.Thus, be advantageous to improve using the arsenic-containing smoke dust of the present invention The economy of technique.

According to an embodiment of the invention, there is mixing device 200 filter residue entrance 201, additive entrance 202, reducing agent to enter Mouth 203, binding agent entrance 204 and mixed material outlet 205, filter residue entrance 201 is connected with sludge outlet 104, and suitable for that will filter Slag, additive, reducing agent and binding agent carry out mixed processing, to obtain mixed material.Thus, filter residue and addition are advantageous to Agent, reducing agent and binding agent are well mixed, and so as to realize, filter residue roasting is abundant in follow-up rotary hearth furnace.

According to one embodiment of present invention, the mixing quality ratio of filter residue and additive, reducing agent and binding agent is 100： (15~40)：(15~33)：(0.1~5).Inventor has found that, when reducing agent dosage is less, lead, zinc and copper reduction are incomplete, Residue in slag and be not recovered, cause the overall recovery of lead, zinc and copper to decline；When reducing agent dosage is more, copper particle is influenceed Agglomeration, the copper grade of copper powder declines, and causes the waste of reducing agent.If the dosage of additive is less, in Warm area and high-temperature region additive are weaker to the fixation of arsenic, and arsenic is volatile to enter leaded zinc flue gas, influences lead zinc dusting product Quality；And if additive amount is more, quantity of slag increase, influenceing copper particle aggregation and grow up, copper powder copper grade declines, and Cause the waste of additive.When consumption of binder is less, pellet strength is poor, easy fragmentation, influences pelletizing reduction effect, final shadow Ring the overall recovery of the valuable metals such as copper, lead, zinc；When consumption of binder is more, cause the waste of binding agent, increase technique into This.

According to still a further embodiment, additive can be lime stone, marble, dolomite, calcite, aragonite At least one of with chalk, wherein, preferably calcite and dolomite.Inventor has found that such additive is when temperature is relatively low (less than 700 degrees Celsius) are that preheating zone is not reacted with arsenic substantially, do not interfere with the volatilization of arsenic oxide, and it is when temperature is higher (reaching 1000 degrees Celsius) i.e. middle warm area and high-temperature region, decomposable asymmetric choice net go out calcium oxide, and copper, lead, zinc etc. can be promoted to be reduced to simple substance, by This, be advantageous to subsequent copper, lead and zinc is separately recovered utilization.

According to still another embodiment of the invention, reducing agent can be bituminous coal, coking coal, graphite, coal slime, anthracite, semi-coke, At least one of coke and lignite.Specifically, reducing agent is mainly carbonaceous material, the work of reduction valuable metal is primarily served With preferably content of ashes is less than 25wt%.Thus, can be abundant by the lead in arsenic-containing smoke dust, zinc and copper reduction, improve respective time Yield.

According to still another embodiment of the invention, binding agent can be organic liquid binding agent, starch, sodium humate, carboxylic At least one of sodium carboxymethylcellulose pyce, pitch, pectin, bentonite, clay, kaolin and red mud.Thus, it is possible to ensure gained Shaping pelletizing has higher intensity, so as to suitable for the reduction roasting in rotary hearth furnace.

According to an embodiment of the invention, shaped device 300 has mixed material entrance 301 and shaping pelletizing outlet 302, mixes Material inlet 301 is closed with mixed material outlet 205 to be connected, and suitable for mixed material is carried out into forming processes, to be molded Pelletizing.Thus, the contact area of each composition in mixed material can further be increased, so as to improve arsenic-containing smoke dust in follow-up rotary hearth furnace With the reaction rate of reducing agent and additive, rotary hearth furnace energy consumption is saved.It should be noted that those skilled in the art can basis It is actually needed the particle size to being molded pelletizing and shape selects, such as it can be flat, pillow that can be molded pelletizing Shape is spherical.

According to an embodiment of the invention, drying unit 400, which has shaping pelletizing entrance 401 and dries pelletizing, exports 402, into Type pelletizing entrance 401 is connected with shaping pelletizing outlet 302, and suitable for shaping pelletizing is dried into processing, to obtain drying Pelletizing.Specifically, the moisture content for drying pelletizing is less than 0.5wt%, by the way that shaping pelletizing is dried, pelletizing can be avoided in rotary hearth furnace Burst in roasting process, ensure roasting effect.

According to an embodiment of the invention, include with reference to figure 1 and Fig. 2, rotary hearth furnace 500：Rotatable stove bottom 51, annular furnace 52nd, barricade 53, the first flue 54, the second flue 55, drawing mechanism 56, benefit wind supercharging burner 57, burning burner 58, dry pelletizing Entrance 501, exhanst gas outlet containing arsenic trioxide 502, leaded zinc exhanst gas outlet 503 and hot product of roasting outlet 504.

According to one embodiment of present invention, along the rotation direction of furnace bottom 51, divided successively by barricade 53 in the burner hearth 52 that goes in ring Be divided into cloth area 510, preheating zone 520, mend wind anallobar 530, middle warm area 540, high-temperature region 550 and discharge zone 560, thus with The drying pelletizing that the rotation of ring-shaped furnace bottom to step into cloth area is successively by preheating zone, benefit wind anallobar, middle warm area, high-temperature region And discharge zone；And in rotary hearth furnace, using barricade by belt burner hearth be divided into successively cloth area, preheating zone, mend wind anallobar, Middle warm area, high-temperature region and discharge zone, the temperature in each region on the one hand can be kept, on the one hand can avoid the dust in cloth area and go out Expect that the flue dust in area enters roasting region, while the flue gas containing arsenic trioxide of preheating zone and the leaded zinc flue gas of middle warm area can be ensured Not mutual crossfire, so as to ensure both qualities.

According to still a further embodiment, the first flue 54 is arranged in preheating zone 520.Specifically, in preheating zone, Dry the part arsenic trioxide in pelletizing and be volatized into flue gas, while part arsenic and five oxidations two have been acted in reducing agent Arsenic, it is reduced into arsenic trioxide and is volatized into flue gas, rotary hearth furnace, the clearance of arsenic trioxide is pulled out out by the first flue Not less than 90%, the remaining arsenic for being difficult to reduction abjection and lead, zinc mend wind anallobar as pelletizing enters in this region；And the One flue can be arranged in the side wall of preheating zone.

According to still another embodiment of the invention, the second flue 55 is arranged in middle warm area 540.Specifically, middle warm area with In high-temperature region, with the rise of temperature, additive starts to react with arsenic, the stable Ca of generation chemical property₃(AsO₄)₂, when When the further rise of temperature reaches 1100 degrees Celsius, FeAsO₄The poor arsenate of equistability can also generate with additive reaction The higher Ca of stability₃(AsO₄)₂, residue in slag, realize the harmless treatment to arsenical, while in additive Under effect, lead, zinc compound in pelletizing are reduced, and are formed lead zinc volatile matter and are entered in flue gas, are pulled out out by the second flue Rotary hearth furnace, realize and efficiently separated with other materials in pelletizing, copper is with sulfate, oxide, arsenate, vulcanization in flue dust The diversified forms such as thing, metal are present, and in roasting (when temperature reaches 1000 degrees Celsius), various forms of copper are in additive with going back The effect of former agent can be reduced into copper simple substance；And the second flue can be arranged in the side wall of middle warm area.

According to still another embodiment of the invention, drawing mechanism 56 is arranged in discharge zone 560, so as to be advantageous to obtain Hot product of roasting smoothly discharges rotary hearth furnace.

According to still another embodiment of the invention, mend wind supercharging burner 57 and be arranged in benefit wind anallobar 530.Specifically, mend Wind anallobar each blows back the flue gas containing arsenic trioxide of preheating zone and the leaded zinc flue gas in high temperature area, separates, keeps away Exempt from flue gas mutually to pollute, while it is oxidizing atmosphere to mend wind anallobar, the arsenic that residue is difficult to reduction abjection is aoxidized, again solid It is scheduled in pelletizing.

According to still another embodiment of the invention, fuel burner nozzle 58 is arranged in preheating zone 520, middle warm area 540 and high-temperature region 550, so as to spray into air and fuel gas into burner hearth simultaneously by fuel burner nozzle, burning produces flame, so as to heat roasting Burn material.

According to still another embodiment of the invention, dry pelletizing entrance 501 and be arranged in cloth area 510, and dry pelletizing Entrance 501 is connected with drying pelletizing outlet 402, and suitable for the drying pelletizing that drying device obtains is supplied to rotary hearth furnace cloth Area.

According to still another embodiment of the invention, exhanst gas outlet containing arsenic trioxide 502 is arranged in preheating zone 520 and with One flue 54 is connected, and suitable for the flue gas containing arsenic trioxide collected through the first flue is discharged into rotary hearth furnace.

According to still another embodiment of the invention, leaded zinc exhanst gas outlet 503 be arranged in middle warm area 540 and with the second flue 55 are connected, and suitable for the leaded zinc flue gas collected through the second flue is discharged into rotary hearth furnace.

According to still another embodiment of the invention, hot product of roasting outlet 504 is arranged in discharge zone 560, and suitable for inciting somebody to action Obtained hot product of roasting discharge rotary hearth furnace.

According to still another embodiment of the invention, cloth area fabric thickness is 10-50mm.Inventor has found, if bed of material mistake Thickness, the heat transfer between the bed of material can be influenceed so that bottom pelletizing slow temperature of being heated is low, causes pellet roasting incomplete, influences to roast Burn effect.

According to still another embodiment of the invention, cloth area, preheating zone, benefit wind anallobar, middle warm area, high-temperature region and discharging Area 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 degree, 40 ~80 degree, 100~160 degree and 15~30 degree.Inventor has found that if cloth area angle too small, locus is narrow, is unfavorable for putting Put distributing device and carry out uniform distribution, angle is excessive, causes space waste.If preheating zone angle too small, residence time of material is short, Arsenic volatilization is incomplete, and the arsenic rate of recovery is low, and angle is excessive, and arsenic has volatilized completely, causes the waste spatially and thermally measured.If mend wind to increase Nip angle too small, then the gas barrier operation of preheating zone and middle and high warm area both sides is unmanageable, and angle is excessive, causes space With the waste of heat.Middle warm area is mainly used in the metals such as roasting reduction lead, zinc and copper with high-temperature region, if high-temperature region angle too small, Then metal reduction is incomplete, and the rate of recovery of the metal such as copper, lead, zinc is low, and angle is excessive, causes space waste；If middle warm area angle Too small, the material heating-up time is too short, and heating rate is limited, can not be connected high-temperature area, causes high-temperature area temperature low, and reduction is not Fully.Discharge zone angular dimension decides whether conveniently to discharge, and angle is excessive, causes the waste spatially and thermally measured.

According to still another embodiment of the invention, the temperature of preheating zone can be 350~700 degrees Celsius, the temperature of middle warm area Degree can be 700~1000 degrees Celsius, and the temperature of high-temperature region can be 1000~1180 degrees Celsius.Inventor has found, if preheating Area's temperature is too high, and lead zinc easily forms volatile matter and enters flue gas, pollutes arsenic trioxide dust, and the too low then arsenic volatilization of temperature is endless Entirely, cause the arsenic trioxide rate of recovery low.If the temperature of middle warm area and high-temperature region is too low, reduction is incomplete, copper, lead and zinc The rate of recovery is low, and temperature is too high, and iron is reduced into simple substance and entered in copper powder, influences the quality of copper powder, and cause energy The waste of amount.

According to still another embodiment of the invention, the air pressure of preheating zone is -5~50Pa, and the air pressure for mending wind anallobar is 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 anallobar Air pressure it is low, can conveniently flue gas containing arsenic trioxide and leaded zinc flue gas smooth exclusion rotary hearth furnace respectively, avoid excessive and run helter-skelter 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 flue gas mutual Pollute and then influence the quality of recovered flue gas；And if the air pressure for mending wind anallobar is too high, easily pelletizing is blown, rolls into furnace bottom water In sealing groove.

The system of processing arsenic-containing smoke dust according to embodiments of the present invention is by the way that the advanced water-filling of arsenic-containing smoke dust is washed, arsenic-containing smoke dust In copper at least 15% be dissolvable in water in water, will then wash gained filter residue, additive, reducing agent and binding agent mix after according to It is secondary to be molded and drying process, and gained drying pelletizing is supplied to rotary hearth furnace, in rotary hearth furnace, barricade by belt burner hearth according to It is secondary to be divided into cloth area, preheating zone, mend wind anallobar, middle warm area, high-temperature region and discharge zone, it on the one hand can keep each region Temperature, the dust in cloth area and the flue dust of discharge zone on the one hand can be avoided to enter roasting region, while containing for preheating zone can be ensured The not mutual crossfire of leaded zinc flue gas of arsenic trioxide flue gas and middle warm area, so as to ensure both qualities, while by mending Arrangement mends wind supercharging burner in wind anallobar, is blown into a large amount of high temperature airs in roasting so that the air pressure in the region is higher than preheating Area and middle warm area, by air pressure and barricade, preheating zone and the flue gas strict separation of middle warm area can be contained three so as to be further ensured that The quality of two arsenic flue gases and leaded zinc flue gas is aoxidized, in middle warm area and high-temperature region (temperature reaches 1000 degrees Celsius), dries pelletizing In the various forms of copper that contain can be reduced into elemental copper in the presence of additive and reducing agent.Thus, using the system The high efficiente callback of the valuable metals such as arsenic in arsenic-containing smoke dust, zinc, lead and copper can be significantly improved, so as to realize the resource of arsenic-containing smoke dust Change and utilize.

According to an embodiment of the invention, further comprise with reference to figure 3, the system of above-mentioned processing arsenic-containing smoke dust：Granulating unit 600th, ore grinding device 700, gravity concentration apparatus 800 and leaching device 900.

According to an embodiment of the invention, granulating unit 600 expects outlet after having hot product of roasting entrance 601 and water quenching 602, hot product of roasting entrance 601 is connected with hot product of roasting outlet 504, and suitable for hot product of roasting is carried out into water quenching Processing, to expect after obtaining water quenching.Inventor has found, by the way that the hot product of roasting of high temperature is directly carried out into water quenching, may be such that Hot product of roasting internal stress drastically raises, and so as to reach the effect of broken hot product of roasting, reduces the energy consumption of follow-up ore grinding, The temperature expected simultaneously after water quenching after water quenching is decreased obviously, and is advantageous to protect subsequent handling equipment.

According to an embodiment of the invention, ore grinding device 700 expects entrance 701 and slurry outlet 702 after having water quenching, after water quenching Material entrance 701 is connected with material outlet 602 after water quenching, and suitable for material after water quenching is carried out into wet ground, to obtain ore pulp.

According to one embodiment of present invention, the concentration of ore pulp is 50-85wt%.Inventor has found that ore pulp is in this concentration In the range of be advantageous to improve grinding efficiency, if the excessive concentration of ore pulp, be unfavorable for ore pulp discharging.

According to still a further embodiment, the granularity of particle is the accounting more than 70% less than 0.045mm in ore pulp. Thus, it is advantageously implemented and selects gravity concentrate subsequently through gravity treatment process.

According to an embodiment of the invention, gravity concentration apparatus 800 has ore pulp entrance 801, solid arsenic slag outlet 802 and gravity concentrate Outlet 803, ore pulp entrance 801 is connected with slurry outlet 702, and suitable for ore pulp is carried out into re-selection process, to obtain solid arsenic slag And gravity concentrate.Inventor has found, though the copper in flue dust is with a variety of shapes such as sulfate, oxide, arsenate, sulfide, metal Formula is present, but in roasting, 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 is larger, can be efficiently separated by gravity treatment with other impurities, obtains the gravity concentrate that copper grade is more than 75%.Need It is noted that the uninterrupted of flushing current in the pulp density present invention with having no particular limits during gravity treatment, this area skill Art personnel can be adjusted according to practical condition and processing requirement.

According to one embodiment of present invention, gravity concentration apparatus can be shaking table, chute, spiral concentrator or centrifugal separation Machine.Thus, be advantageous to improve the reselection efficiency of gravity concentrate.

According to an embodiment of the invention, leaching device 900 has gravity concentrate entrance 901, immersion liquid entrance 902, metallic copper Powder outlet 903 and leachate outlet 904, gravity concentrate entrance 901 are connected with gravity concentrate outlet 803, immersion liquid entrance 902 and filter Liquid outlet 103 is connected, and leachate outlet 904 is connected with ore grinding device 700, and suitable for gravity concentrate and Water filtration device for filtering are obtained The filtrate arrived carries out leaching process, to obtain copper powder and leachate, and leachate is back into ore grinding device.Specifically , first gravity concentrate is dehydrated to moisture content and is less than 15%, then mixes and is leached with the filtrate that Water filtration device for filtering obtains, Sulfuric acid adjustment pH to 2-4 is added, the liquid-solid ratio of immersion liquid and gravity concentrate is controlled, obtains copper powder and leachate, gained metal Cupric is more than 97% to copper powder by weight.Wherein, the preferred 5-60g/L of content of copper ion in filtrate, and in leaching process, can be with Copper ion is suitably added according to the extent of reaction of gravity concentrate, to improve the purity of copper powder.Containing a certain amount of in leachate Copper ion, if directly discharge can seriously pollute environment, and if carry out subsequent treatment qualified discharge cost it is higher, the present invention lead to Cross by leachate return ore grinding device so that the copper ion remained in leachate in grinding process with after water quenching expect in new explanation from Metallic iron out constantly contacts, and because the new interface reactivity that metallic iron mill strips out is higher, can occur with copper ion deep Degree displacement, the copper on the one hand remained in recyclable leachate, the overall recovery of copper when improving gravity treatment, on the one hand realize simultaneously again To the purified treatment of leachate waste liquid, its content of copper ion is set to drop within national wastewater discharge standard 2.0mg/L, further , because leachate is acidity, and ore pulp is alkalescence, and thus leachate can neutralize the ore pulp in ore grinding device.

According to one embodiment of present invention, the liquid-solid ratio of immersion liquid and gravity concentrate can be (15-65)：(35-85).Hair A person of good sense has found, if the liquid-solid ratio of immersion liquid and gravity concentrate is too high, obtained copper powder quality is high, but leaching waste liquid amount increases, Increase subsequent wastewater treatment difficulty；And if the liquid-solid ratio of immersion liquid and gravity concentrate is too low, the leaching waste liquid amount of output is less, convenient Subsequent wastewater treatment, but obtained copper powder quality is slightly lower.

According to still a further embodiment, the temperature of leaching can be 35-65 degrees Celsius, and the time can be 5- 60min.Inventor has found that extraction temperature is high, and Leach reaction is fast, and extraction time is short, and treating capacity is high, but high energy consumption, equipment corrosion It hurry up；Extraction temperature is low, extraction time length, and treating capacity is low.Extraction time is short, reacts incomplete, the impure height of copper powder, quality Difference, extraction time is long, and production efficiency reduces.

According to an embodiment of the invention, further comprise with reference to figure 4, the system of above-mentioned processing arsenic-containing smoke dust：Arsenic collects dress Put 1000.

According to an embodiment of the invention, arsenic collection device 1000 has smoke inlet containing arsenic trioxide 1001 and thick three oxygen Change two arsenic outlet 1002, smoke inlet containing arsenic trioxide 1001 is connected with exhanst gas outlet containing arsenic trioxide 502, and suitable for inciting somebody to action Flue gas containing arsenic trioxide carries out arsenic collection processing, to obtain thick arsenic trioxide.Thus, can be achieved to arsenic in arsenic-containing smoke dust Collection, so as to overcoming arsenic leaching rate in existing " wet method+pyrogenic process " process integration low, and constantly circulated in smelting system Shortcoming, efficiently separating for arsenic and valuable metal is truly realized, and open circuit harmless treatment has been carried out to arsenic.

According to an embodiment of the invention, further comprise with reference to figure 5, the system of above-mentioned processing arsenic-containing smoke dust：Bag collection Device 1100.

According to an embodiment of the invention, bag collection device 1100 has leaded zinc smoke inlet 1101 and leaded zinc powder dirt Outlet 1102, leaded zinc smoke inlet 1101 is connected with leaded zinc exhanst gas outlet 503, and suitable for leaded zinc flue gas is gathered dust Processing, to obtain leaded zinc powder dirt.Thus, the recovery to lead in arsenic-containing smoke dust and zinc can be achieved.

According to an embodiment of the invention, the system of processing arsenic-containing smoke dust proposed by the present invention at least has what follows advantage One of：

The system of processing arsenic-containing smoke dust according to embodiments of the present invention, handles flue dust by using rotary hearth furnace, can directly obtain To lead product；

The system of processing arsenic-containing smoke dust according to embodiments of the present invention, overcomes in existing " wet method+pyrogenic process " process integration Arsenic leaching rate it is low and in smelting system constantly circulation the shortcomings that, be truly realized efficiently separating for arsenic and valuable metal, and right Arsenic has carried out open circuit harmless treatment；

The system of processing arsenic-containing smoke dust according to embodiments of the present invention, the copper in arsenic-containing smoke dust are carried out in the form of elemental copper Recovery, and the rate of recovery is high, obtained copper powder is purer, remarkable in economical benefits.

In another aspect of the invention, the present invention, which proposes a kind of system using above-mentioned processing arsenic-containing smoke dust and handled, to be contained The method of arsenic flue dust, according to an embodiment of the invention, with reference to figure 6, this method includes：

S100：Arsenic-containing smoke dust and water are supplied and washed into Water filtration device for filtering and filtration treatment

In the step, arsenic-containing smoke dust and water are supplied and washed into Water filtration device for filtering and filtration treatment, so as to To filtrate and filter residue.Specifically, arsenic-containing smoke dust is added into water stirring pulping at normal temperatures first, and the mass concentration of slurries is controlled Part soluble copper ion-solubility is in slurries in 30%-75%, arsenic-containing smoke dust, and after slurries stirring a period of time, press filtration can Filtrate and filter residue are obtained, if cupric is less than 2g/L in filtrate, filtrate is returned and is repeatedly used for washing, until copper ion is dense in filtrate Degree reaches 2g/L.

S200：Filter residue, additive, reducing agent and binding agent are supplied into mixing device and carry out mixed processing

In the step, filter residue, additive, reducing agent and binding agent are supplied into mixing device and carry out mixed processing, with Just mixed material is obtained.Thus, be advantageous to filter residue to be well mixed with additive, reducing agent and binding agent, so as to realize follow-up turn Filter residue roasting is abundant in the stove of bottom.

S300：Mixed material is supplied into shaped device and carries out forming processes

In the step, mixed material is supplied into shaped device and carries out forming processes, to obtain being molded pelletizing.By This, can further increase the contact area of each composition 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 actual need The particle size and shape for being molded pelletizing are selected, such as it can be flat, pillow shape or ball that can be molded pelletizing Shape.

S400：Shaping pelletizing is supplied into drying unit and carries out drying and processing

In the step, shaping pelletizing is supplied into drying unit and carries out drying and processing, to obtain drying pelletizing.Specifically , the moisture content for drying pelletizing is less than 0.5wt%, by the way that shaping pelletizing is dried, can avoid pelletizing in rotary hearth furnace roasting process It is middle to burst, ensure roasting effect.

S500：Pelletizing will be dried to supply to the cloth area of rotary hearth furnace, and as the rotation of ring-shaped furnace bottom is successively by preheating Area, mend wind anallobar, middle warm area, high-temperature region and discharge zone

In the step, pelletizing will be dried and supplied to the cloth area of rotary hearth furnace, and passed through successively with the rotation of ring-shaped furnace bottom Preheating zone, mend wind anallobar, middle warm area, high-temperature region and discharge zone, so as to 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 pelletizing is dried Aoxidize two arsenic and be volatized into flue gas, while part arsenic and diarsenic pentoxide have been acted in reducing agent, be reduced into three oxidations two Arsenic is simultaneously volatized into flue gas, is pulled out out rotary hearth furnace by the first flue, the clearance of arsenic trioxide is not less than 90%, in this area The remaining arsenic for being difficult to reduction abjection and lead, zinc mend wind anallobar as pelletizing enters in domain, mend wind anallobar containing preheating zone Arsenic trioxide flue gas and the leaded zinc flue gas in high temperature area are each blown back, and are separated, are avoided flue gas from mutually polluting, mend simultaneously Wind anallobar is oxidizing atmosphere, and the arsenic that residue is difficult to reduction abjection is aoxidized, and is retightened in pelletizing；Middle warm area with In high-temperature region, with the rise of temperature, additive starts to react with arsenic, the stable Ca of generation chemical property₃(AsO₄)₂, it is residual Stay in slag, realize the harmless treatment to arsenical, while in the presence of additive, lead, zinc compound are reduced, Form lead zinc volatile matter to enter in flue gas, rotary hearth furnace is pulled out out by the second flue, realize has with other materials 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, the effective of copper, arsenic and lead zinc can be achieved Separation.

According to one embodiment of present invention, cloth area fabric thickness is 10-50mm.Inventor has found, if the bed of material is blocked up, The heat transfer between the bed of material can be influenceed so that bottom pelletizing slow temperature of being heated is low, causes pellet roasting incomplete, influences roasting effect Fruit.

According to still a further embodiment, the temperature of preheating zone can be 350~700 degrees Celsius, the temperature of middle warm area Degree can be 700~1000 degrees Celsius, and the temperature of high-temperature region can be 1000~1180 degrees Celsius.Inventor has found, if preheating Area's temperature is too high, and lead zinc easily forms volatile matter and enters flue gas, pollutes arsenic trioxide dust, and the too low then arsenic volatilization of temperature is endless Entirely, cause the arsenic trioxide rate of recovery low.If the temperature of middle warm area and high-temperature region is too low, reduction is incomplete, copper, lead and zinc The rate of recovery is low, and temperature is too high, and iron is reduced into simple substance and entered in copper powder, influences the quality of copper powder, and cause energy The waste of amount.

The method of processing arsenic-containing smoke dust according to embodiments of the present invention is by the way that the advanced water-filling of arsenic-containing smoke dust is washed, arsenic-containing smoke dust In copper at least 15% be dissolvable in water in water, will then wash gained filter residue, additive, reducing agent and binding agent mix after according to It is secondary to be molded and drying process, and gained drying pelletizing is supplied to rotary hearth furnace, in rotary hearth furnace, barricade by belt burner hearth according to It is secondary to be divided into cloth area, preheating zone, mend wind anallobar, middle warm area, high-temperature region and discharge zone, it on the one hand can keep each region Temperature, the dust in cloth area and the flue dust of discharge zone on the one hand can be avoided to enter roasting region, while containing for preheating zone can be ensured The not mutual crossfire of leaded zinc flue gas of arsenic trioxide flue gas and middle warm area, so as to ensure both qualities, while by mending Arrangement mends wind supercharging burner in wind anallobar, is blown into a large amount of high temperature airs in roasting so that the air pressure in the region is higher than preheating Area and middle warm area, by air pressure and barricade, preheating zone and the flue gas strict separation of middle warm area can be contained three so as to be further ensured that The quality of two arsenic flue gases and leaded zinc flue gas is aoxidized, in middle warm area and high-temperature region (temperature reaches 1000 degrees Celsius), dries pelletizing In the various forms of copper that contain can be reduced into elemental copper in the presence of additive and reducing agent.Thus, using this method The high efficiente callback of the valuable metals such as arsenic in arsenic-containing smoke dust, zinc, lead and copper can be significantly improved, so as to realize the resource of arsenic-containing smoke dust Change and utilize.

According to an embodiment of the invention, with reference to figure 7, containing arsenic, your method of flue dust further comprises for above-mentioned processing：

S600：Hot product of roasting is supplied into granulating unit and carries out Water Quenching

In the step, hot product of roasting is supplied into granulating unit and carries out Water Quenching, to expect after obtaining water quenching. Inventor has found, by the way that the hot product of roasting of high temperature is directly carried out into water quenching, may be such that hot product of roasting internal stress drastically Rise, so as to reach the effect of broken hot product of roasting, reduces the energy consumption of follow-up ore grinding, while expect after water quenching after water quenching Temperature is decreased obviously, and is advantageous to protect subsequent handling equipment.

S700：Material supply after water quenching is subjected to wet ground into ore grinding device

In the step, material supply after water quenching is subjected to wet ground into ore grinding device, to obtain ore pulp.

S800：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 gravity concentrate and solid arsenic slag. Inventor has found, though the copper in flue dust exists with diversified forms such as sulfate, oxide, arsenate, sulfide, metals, During roasting, 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 It is larger, it can be efficiently separated by gravity treatment with other impurities, obtain the gravity concentrate that copper grade is more than 75%.Need what is illustrated It is that the uninterrupted of current is rinsed during gravity treatment with being had no particular limits in the pulp density present invention, those skilled in the art can To be adjusted according to practical condition and processing requirement.

S900：The obtained filtrate of gravity concentrate and S100 is supplied into leaching device and carries out leaching process

In the step, the obtained filtrate of gravity concentrate and S100 is supplied into leaching device and carries out leaching process, so as to Copper powder and leachate are obtained, and leachate is back to the ore grinding device in S700.Specifically, first gravity concentrate is dehydrated It is less than 15% to moisture content, then mixes and leached with the filtrate that Water filtration device for filtering obtains, adds sulfuric acid adjustment pH to 2- 4, the liquid-solid ratio of immersion liquid and gravity concentrate is controlled, obtains copper powder and leachate, cupric is big by weight for gained copper powder In 97%.Wherein, the preferred 5-60g/L of content of copper ion in filtrate, and in leaching process, can be according to the reaction of gravity concentrate Degree suitably adds copper ion, to improve the purity of copper powder.Contain a certain amount of copper ion in leachate, if directly discharging meeting Serious pollution environment, and if to carry out the cost of subsequent treatment qualified discharge higher, it is of the invention by the way that leachate is returned into ore grinding Device so that the copper ion remained in leachate is in grinding process with newly dissociateing the metallic iron not disconnecting come in expecting after water quenching Touch, because metallic iron mill strip out come new interface reactivity it is higher, can with copper ion occur depth displacement, on the one hand it is recyclable The copper remained in leachate, the overall recovery of copper when improving gravity treatment, on the one hand realize the purification to leachate waste liquid simultaneously again Processing, makes its content of copper ion drop within national wastewater discharge standard 2.0mg/L, further, because leachate is acidity, and Ore pulp is alkalescence, and thus leachate can neutralize the ore pulp in ore grinding device.

According to an embodiment of the invention, with reference to figure 8, containing arsenic, your method of flue dust further comprises for above-mentioned processing：

S1000：Arsenic trioxide flue gas will be contained and supply into arsenic collection device progress arsenic collection processing

In the step, arsenic trioxide flue gas will be contained and supply into arsenic collection device progress arsenic collection processing, to obtain Thick arsenic trioxide.Thus, the collection to arsenic in arsenic-containing smoke dust can be achieved, so as to overcome existing " wet method+pyrogenic process " to combine work Arsenic leaching rate is low in skill, and in smelting system constantly circulation the shortcomings that, be truly realized efficiently separating for arsenic and valuable metal, And open circuit harmless treatment is carried out to arsenic.

According to an embodiment of the invention, with reference to figure 9, containing arsenic, your method of flue dust further comprises for above-mentioned processing：

S1100：Leaded zinc flue gas is supplied processing of gathering dust is carried out into bag collection device

In the step, leaded zinc flue gas is supplied processing of gathering dust is carried out into bag collection device, to obtain leaded zinc Dust.Thus, the recovery to lead in arsenic-containing smoke dust and zinc can be achieved.

Below with reference to specific embodiment, present invention is described, it is necessary to which explanation, these embodiments are only to describe Property, without limiting the invention in any way.

Embodiment 1

Certain smelting smoke dust 14.8wt% containing Cu, Fe 8.79wt%, Pb 3.14wt%, Zn 1.09wt%, AS 4.94wt%, wherein 29.7% Cu is water-soluble.By flue dust solid-to-liquid ratio 1:1 is dissolved in water, stirring washing flue dust, then solid-liquid point From obtaining filter residue and filtrate, filtrate returns and washed repeatedly, finally gives copper ions 33.14g/L filtrate.Filter residue is dried, with Additive (dolomite), reducing agent (semi-coke, containing ash content 15%) and binding agent (sodium humate 40%+ bentonites 60%), by weight Amount proportioning 100：15：25：4 carry out dispensing.Mixed material prepares pelletizing after mixing.It is sent into rotary hearth furnace and is roasted after pelletizing drying Burn.Rotary hearth furnace roasting system table 1.

The flue of rotary hearth furnace first, which is collected, must contain As₃O₂92.49% arsenic trioxide dust, received from the flue of rotary hearth furnace second Collect to obtain leaded zinc powder dirt, lead recovery 95.47%, zinc recovery 98.36%.

Water quenching after hot product of roasting discharge rotary hearth furnace, carries out wet grinding.Pulp density is 75wt% during ore grinding, is obtained Fineness is the ore pulp that below 0.037mm accounts for more than 75%, and ore pulp carries out gravity treatment using shaking table, obtains gravity concentrate and the solid arsenic of mine tailing Slag, after gravity concentrate vacuum filter, the filtrate of flue dust washing step is added, is leached.It is 65 to leach liquid-solid ratio：35, leach Temperature is 65 degrees Celsius, and extraction time 30min, pH are 2 or so.Separation of solid and liquid after the completion of leaching, obtain the pure of cupric 99.11% Copper powder and leachate.Copper ions 1.89g/L in leachate, the ore grinding stage is returned to for adjusting ore milling concentration, by gravity treatment Process excludes into waste water, and solution copper ions concentration is 1.8mg/L during discharge, reaches discharging standards.

The rotary hearth furnace of table 1 is calcined system

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show 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 present invention.In this manual, to the schematic representation of above-mentioned term not Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification Close and combine.

Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned Embodiment is changed, changed, replacing and modification.

Claims

A kind of 1. system for handling arsenic-containing smoke dust, it is characterised in that including：

Water filtration device for filtering, the Water filtration device for filtering have arsenic-containing smoke dust entrance, water inlet, filtrate (liquid and sludge outlet；

Mixing device, the mixing device have filter residue entrance, additive entrance, reducing agent entrance, binding agent entrance and mixing Material outlet, the filter residue entrance are connected with the sludge outlet；

Shaped device, the shaped device have mixed material entrance and the outlet of shaping pelletizing, the mixed material entrance and institute Mixed material outlet is stated to be connected；

Drying unit, the drying unit, which has shaping pelletizing entrance and dries pelletizing, to be exported, the shaping pelletizing entrance and institute The outlet of shaping 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, it is divided into cloth area, preheating in the belt burner hearth successively by barricade Area, mend wind anallobar, middle warm area, high-temperature region and discharge 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 is arranged in the cloth area, and the dry pelletizing entrance with it is described Pelletizing outlet is dried to be 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, it is characterised in that further comprise：

Granulating unit, the granulating unit expect outlet, the hot product of roasting after having hot product of roasting entrance and water quenching Entrance is connected with the hot product of roasting outlet；

Ore grinding device, the ore grinding device expect entrance and slurry outlet after having water quenching, entrance and the water are expected after the water quenching Material outlet is connected after quenching；

Gravity concentration apparatus, the gravity concentration apparatus have ore pulp entrance, gravity concentrate outlet and a solid arsenic slag outlet, the ore pulp entrance with The slurry outlet is connected；

Leaching device, the leaching device have gravity concentrate entrance, immersion liquid entrance, copper powder outlet and leachate outlet, The gravity concentrate entrance is connected with gravity concentrate outlet, and the immersion liquid entrance is connected with the filtrate (liquid, the leaching Eluate outlet is connected with the ore grinding device.
3. system according to claim 1 or 2, it is characterised in that further comprise：

Arsenic collection device, there is the arsenic collection device smoke inlet containing arsenic trioxide and thick arsenic trioxide to export, described Smoke inlet containing arsenic trioxide is connected with the exhanst gas outlet containing arsenic trioxide.
4. system according to claim 1 or 2, it is characterised in that further comprise：

Bag collection device, the bag collection device has leaded zinc smoke inlet and leaded zinc dust outlet, described leaded Zinc smoke inlet is connected with the leaded zinc exhanst gas outlet.
5. system according to claim 1, it is characterised 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 Wei not be 15~22 degree, 80~140 degree, 0.5~10 degree, 40~80 degree, 100~160 degree and 15~30 degree.
6. a kind of method that system using any one of claim 1-5 handles arsenic-containing smoke dust, it is characterised in that bag Include：

(1) arsenic-containing smoke dust and water are supplied into the Water filtration device for filtering and washed and filtration treatment, to obtain filtrate And filter residue；

(2) filter residue, additive, reducing agent and binding agent are supplied and mixed processing is carried out into the mixing device, so as to Obtain mixed material；

(3) mixed material is supplied and forming processes is carried out into the shaped device, to obtain being molded pelletizing；

(4) the shaping pelletizing is supplied and drying and processing is carried out into the drying unit, to obtain drying pelletizing；

(5) the dry pelletizing is supplied to the cloth area of the rotary hearth furnace, and with the ring-shaped furnace bottom rotation according to It is secondary to pass through the preheating zone, benefit wind anallobar, the middle warm area, the high-temperature region and the discharge zone, to be contained Arsenic trioxide flue gas, leaded zinc flue gas and hot product of roasting.
7. according to the method for claim 6, it is characterised in that further comprise：

(6) the hot product of roasting is supplied and Water Quenching is carried out into the granulating unit, to expect after obtaining water quenching；

(7) material supply after the water quenching is subjected to wet ground into the ore grinding device, to obtain ore pulp；

(8) ore pulp is supplied and re-selection process is carried out into the gravity concentration apparatus, to obtain gravity concentrate and solid arsenic slag；

(9) filtrate that the gravity concentrate and step (1) obtain is supplied and leaching process is carried out into the leaching device, To obtain copper powder and leachate, and the leachate is back to the ore grinding device in step (7).
8. the method according to claim 6 or 7, it is characterised in that further comprise：

(10) flue gas containing arsenic trioxide is supplied into the arsenic collection device and carries out arsenic collection processing, it is thick to obtain Arsenic trioxide.
9. the method according to claim 6 or 7, it is characterised in that further comprise：

(11) the leaded zinc flue gas is supplied and carries out processing of gathering dust into the bag collection device, to obtain leaded zinc powder Dirt.
10. according to the method for claim 6, it is characterised in that in step (2), the filter residue and the additive, institute State reducing agent, the mixing quality ratio of the binding agent is 100：(15~40)：(15~33)：(0.1~5).