CN106756056B - A kind of method of Copper making white cigarette dirt dearsenification - Google Patents

A kind of method of Copper making white cigarette dirt dearsenification Download PDF

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CN106756056B
CN106756056B CN201611025619.3A CN201611025619A CN106756056B CN 106756056 B CN106756056 B CN 106756056B CN 201611025619 A CN201611025619 A CN 201611025619A CN 106756056 B CN106756056 B CN 106756056B
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arsenic
white cigarette
dearsenification
cigarette dirt
acid
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CN106756056A (en
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夏举佩
杨劲
罗中秋
刘海浪
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Kunming University of Science and Technology
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Kunming University of Science and Technology
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/02—Working-up flue dust
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00—Obtaining copper
    • C22B15/0063—Hydrometallurgy
    • C22B15/0065—Leaching or slurrying
    • C22B15/0067—Leaching or slurrying with acids or salts thereof
    • C22B15/0071—Leaching or slurrying with acids or salts thereof containing sulfur
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00—Obtaining copper
    • C22B15/0063—Hydrometallurgy
    • C22B15/0084—Treating solutions
    • C22B15/0089—Treating solutions by chemical methods
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/20—Obtaining zinc otherwise than by distilling
    • C22B19/22—Obtaining zinc otherwise than by distilling with leaching with acids
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B30/00—Obtaining antimony, arsenic or bismuth
    • C22B30/04—Obtaining arsenic
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B30/00—Obtaining antimony, arsenic or bismuth
    • C22B30/06—Obtaining bismuth
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/006—Wet processes
    • C22B7/007—Wet processes by acid leaching
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

The present invention discloses a kind of method of Copper making white cigarette dirt dearsenification, the white cigarette dirt collected using Copper making electric precipitator is raw material, arsenic is converted by arsenic acid using concentrated sulfuric acid acidization, it is dissolved again with water, the addition of water is 4~5 times of white cigarette dirt quality, dissolution time is 1~1.5 hour, reinforcing body sodium carbonate adjusts pH value to 8.0~8.5 after dissolving, soluble metal sulfate is switched to precipitate, it is detached with natrium arsenicum salt through filtering, it is washed twice with clear water, filter cake is the dearsenification filter cake rich in valuable metal, its arsenic content ＜ 0.5%, filtrate simultaneously becomes owner of production lime molysite dearsenification system, sewage treatment equipment need not be increased newly；This method equipment is simple, is not required to heating, is easy to operate, and arsenic extrusion rate is high, is acidified arsenic content in slag and meets bing ore three-level quality criteria requirements, also provides convenience condition for other molten valuable metal recoveries of acid in white cigarette dirt, with preferable application value.

Description

A kind of method of Copper making white cigarette dirt dearsenification
Technical field
The present invention relates to a kind of methods of Copper making white cigarette dirt dearsenification, belong to dangerous solid waste danger source separating treatment Technical field.
Background technology
Copper is one of basic industries raw material of modern Economy Development, due to its with conductive and heat-conductive, anti-tensile wear-resisting property compared with It is good, thus be widely applied in fields such as electric power electric, machine-building, transport, building, the energy, war industrys.
Melting is the most important smelting process of copper smelting by pyrometallurgy, and traditional method of smelting is in blast furnace, reverberatory furnace and electric furnace It carries out, the major defect of this technique is：The chemical reaction heat of sulfide oxidation in furnace charge cannot be made full use of to make energy, mineral Fuel quantity or power consumption are big；Output S02Flue gas concentration is low, and production sulfuric acid is uneconomical, easily causes seriously to pollute to environment.Therefore Traditional smelting technology is gradually replaced by efficient, energy saving and low stain intensified smelting new process.
In terms of the transformation of recent domestic technique and new projects' technical solution, all using the technology of smelting system as emphasis, and Selection is suitble to the advanced melting technique and equipment of own characteristic, wherein copper concentrate dispensing-disk pelletizing-Ausmelt furnace molten Refine-bessemerize-the big pole plate electrorefining of Rotary Anode Furnace pyro-refining-routine is new upper Copper making first choice work at present Skill.
Copper making white cigarette dust derive from electric furnace flue gas and melting flue gas, electric furnace flue gas main component be nitrogen and oxygen, Also contain a small amount of water vapour and sulfur dioxide, temperature is generally at 420 DEG C or so, dustiness about 30g/Nm3；Melting flue gas is main Ingredient is nitrogen, sulfur dioxide and water vapour, also contains a small amount of oxygen and sulfur trioxide, and temperature is up to 1200 DEG C or more, contains Dust quantity about 210g/Nm3, after waste heat boiler recycles sensible heat, temperature drops to 390 DEG C or so, and dustiness is down to 120g/Nm3, proportion Greatly, the dust of coarse size is assembled herein.The melting flue gas come out from waste heat boiler is mixed with electric furnace flue gas, and mixture temperature is about 300 DEG C, dustiness is in 105~110 g/Nm3, become high copper fumes Returning smelting system through the trapping of the first electric field of cottrell and make Feed stock for blast furnace uses.Cottrell second and third, four electric fields collect flue dust due to containing more harmful impurity component, it is unsuitable Returning smelting system, as the white cigarette dust.
Since Copper making white cigarette dust is the mixture rich in valuable metal and harmful element, arsenic content is high and containing a small amount of Arsenic oxide is a kind of dangerous solid waste, but is also the resource that can be used, and the bottleneck of its recycling is caused to be asked Topic is that arsenic content is high, if arsenic in white cigarette dirt can deviate from, not only can concentration of valuable metals content, while can also use tradition pyrogenic process smelting Golden or wet method combined pyrometallurgy is recycled valuable metal, fully demonstrates its own value, therefore, numerous scholars couple The dearsenification of white cigarette dirt has carried out being directed to Journal of Sex Research, such as：
Horse object phase composition and the chemical binding state for having studied Henan enterprise white cigarette dirt such as vast, the results showed that, in sample Elements A s relative amounts are up to 20.99%, wherein 11% with free state As2O3Form exists, remaining is with PbAs2O6Form exists. Also contain metals and its oxides such as a small amount of Cu, Pb, Zn in sample, is carried out using the sulfuric acid of 4mol/L is added after hydrogen peroxide oxidation Acidleach, 30 DEG C of reaction temperature, 3 hours time, liquid-solid ratio 7：1 acidleach dearsenicating technology, the leaching rate for obtaining arsenic are 97.1% good result.
Xing Peng etc., using low temperature sulfating roasting technique, makes the arsenic in cigarette ash with As using high arsenic zinc cigarette ash as raw material203Shape Formula volatilization effusion, is collected through dust collecting system.The valuable metals such as zinc, indium, germanium are changed into sulfate in roasting process, realize with The influence of sulfuric acid dosage, temperature, roasting time to dearsenification has been investigated in the separation of arsenic.The result shows that：1.2 times of theories of sulfuric acid dosage Amount, 300 DEG C of temperature, roasting time 3h, the removal efficiency of arsenic is up to 78.28% after roasting.
Li Wei etc. has carried out dearsenification pretreatment using the method being evaporated in vacuo to flue dust, the results showed that：Temperature is 673K, is steamed The hair time is 30min, and under conditions of system pressure is 40Pa, the evaporation rate of flue dust is 16.2%, and arsenic content is reduced in steaming excess 1.12%, the removal efficiency of arsenic is 92.7%.
A kind of methods of Copper making flue dust dearsenification of CN104962747A, follow the steps below：（1）It collects：Collect copper Smelting smoke dust；（2）It leaches：Copper making flue dust is mixed with industrial sulphuric acid, 30~40% hydrogen peroxide are added in mixed liquor and make It for oxidant, is heated to 70~80 DEG C and is leached, extraction time is 2~3 hours；（3）Filtering：The product leached is filtered, point From leachate and leached mud；（4）Dearsenification：After filtering, the high price iron of flue dust quality 50~60% is added in leachate, is heated to 80~90 DEG C, milk of lime is used in combination to adjust pH value, is allowed to generate precipitated ferric arsenate precipitation, the dearsenification time is 3~4 hours；（5）Point From：Isolate the ferric arsenate of Precipitation.
Arsenic removing methods of the CN104593610A containing arsenic smoke dust, includes the following steps：1）Dispensing：It is calculated according to arsenic content per ton The concentrated sulfuric acid, coal amount needed for cigarette ash dispensing, by weight percentage As:The concentrated sulfuric acid:Fine coal=1:0.10~1.50:0.10~ 0.50, by cigarette ash, the concentrated sulfuric acid and fine coal mixing；2）Reduction roasting：The raw material prepared is fitted into electric heating converter, the wind that gathers dust is opened Machine, is warming up to 300~450 DEG C, and rotation roasting 1.5-3 hours discharges；3）Send dearsenification calcining to indium recovery system Leaching Zinc, indium, Extraction and recovery indium.
A kind of methods of arsenic-containing smoke dust fluidization dearsenification of CN104451171A, include the following steps：（1）It is dry, arsenic will be contained Flue dust is warming up to 80 DEG C~150 DEG C, and dry 1h~10h, water quality percentage composition is less than 8% in flue dust after drying；（2）Fluidization Arsenic-containing smoke dust after drying is volatilized and is restored by reduction volatilization, is passed through protective gas and reducibility gas keeps arsenic-containing smoke dust to suspend, Reducibility gas is 0.05~5 with protective gas volume ratio：100, reaction temperature control is 350 DEG C~480 DEG C, the reaction time Control 3min~30min, make in flue dust in the form of diarsenic pentoxide existing for arsenic react with reducibility gas and generate three oxygen Change two arsenic；（3）Fluidization is directly volatilized, and the suspended state of arsenic-containing smoke dust is kept, and is passed through protective gas to control reaction atmosphere and is Protective atmosphere, reaction temperature control are 500 DEG C~600 DEG C, reaction time control 30min~120min, remaining in flue dust Arsenic trioxide directly volatilizees, raw material of the residue after fluidization volatilization as recycling valuable metal；（4）Fume high-temperature gathers dust, Flue-gas temperature is kept to gather dust at 450 DEG C~500 DEG C, the flue dust return to step of acquisition（2）；（5）Arsenic is received in flue gas cooling, is passed through The flue gas that high temperature gathers dust is cooled to 120 DEG C~220 DEG C, and arsenic trioxide product is obtained through gathering dust.
A kind of methods of white cigarette dirt dearsenification of CN103952563A, white cigarette dirt and industrial sulphur that Copper making process generates are pressed 1:0.3~0.5 weight ratio mixing, the first calcination at 330~370 DEG C, obtained calcining is again at 600 DEG C~660 DEG C Volatilization, 0.6~2% is down to by arsenic content in final calcining.
A kind of methods from dearsenification in flue dust containing arsenic trioxide of CN1012007761, including 5 valences after leaching in liquid Arsenic is removed with lime precipitation, it is characterized in that, the pH value that leachate is adjusted with sodium hydroxide, sodium carbonate or ammonium hydroxide is 5~12, and liquid is solid Weight ratio is 2~10: 1, adds hydrogen peroxide under agitation and is leached, and the additive amount of hydrogen peroxide is chemical reaction metering 100~300%, extraction temperature is 20~100 DEG C, and extraction time is 1~10 hour.
In conclusion smelting arsenic-containing smoke dust dearsenification mainly has the acid-hatching of young eggs, the oxidation-acid-hatching of young eggs, roasting method, reduction method etc., acid Leaching method is conducive to more METAL EXTRACTIONs, but to reach the efficient dissolution of arsenic, obtains low arsenic lead-rich slag, it is necessary to which oxidizer, this is not only It is high to improve the anti-rotten requirement of equipment, while security risk can be brought to production operation, and the present invention is without the use of oxidant, uses High concentrated acid is directly acidified molten arsenic, and not only effect is good, and equipment production capacity is big, and operation is also convenient and simple.
Invention content
The purpose of the present invention is will be converted into Soluble Arsenic in Copper making white cigarette dirt with arsenic existing for arsenate and oxide Hydrochlorate is detached with valuable metal, and the direct enriching sulfuric acid dialogue flue dust of the present invention is acidified, and converts arsenic to arsenic acid, then The metal of vitriolization is transferred to solid phase with precipitation form by adjusting pH value, then is detached arsenic with valuable metal by filtering, Arsenic leaching solution is directly incorporated into main production dearsenification system, is not required to separately increase processing equipment.
For the present invention by Copper making white cigarette dirt, ingredient is mainly refined copper raw material flores and gas after high-temperature roasting Dust is carried, in the case where there are hot conditions existing for arsenic oxide atmosphere, most of arsenic is combined into stable arsenic with metal oxide Hydrochlorate or double salt, then still exist in the form of an oxide on a small quantity.Sulfuric acid is strong acid, and arsenic acid or arsenious acid belong to weak acid, therefore, just For theory, arsenic oxide or arsenate can be converted in sulfate and arsenic acid with sulfuric acid, but white cigarette dirt passes through hot environment, The arsenate structure of formation is relatively stable, this is also the main reason for acidleach liquid phase method dearsenification effect is poor, considers above-mentioned point Analysis, the present invention carry out acidification using direct enriching sulfuric acid, strengthen the conversion of arsenate by improving hydrogen ion concentration, profit Low price arsenic compound is oxidized to high valence ion with the oxidisability of high-concentration sulfuric acid, reduces its toxicity.In arsenic acid forming process, Will necessarily be with the generation of corresponding sulfate, and most of sulfate is that solvable or indissoluble substance will necessarily if not recycled The loss for causing valuable metal, by white cigarette dirt valuable metal ingredient it is found that the hydroxide of these ions is insoluble or indissoluble Therefore object can convert released ion to precipitation, arsenic is then with natrium arsenicum by way of adding sodium carbonate to adjust acidulants pH value Form remaines in liquid phase, and to be detached with arsenic by filter type, it is de- that arsenious waste solution can be directly incorporated into main production lime-molysite Arsenic system carries out arsenic-containing waste water processing using existing equipment and technique.
Technical scheme of the present invention：A kind of method of Copper making white cigarette dirt dearsenification, specifically comprises the following steps：
（1）Acidification：Copper making white cigarette dirt is mixed with the concentrated sulfuric acid, wherein the addition of the concentrated sulfuric acid is by the arsenic in white cigarette dirt 1.1~1.2 times of hydrogen ion theoretical amount needed for arsenic acid are converted into, 4~5h is acidified after mixing homogenizing；
（2）Dissolving：Step（1）It is dissolved in water after acidification, with step（1）White cigarette dirt quality meter liquid consolidate mass ratio and be 4~5 ︰ 1, stirring and dissolving, it is 1~1.5 hour that mixing speed has relative flow, normal-temperature operation, dissolution time with solid；
（3）It is heavy to return：Step（2）Reinforcing body sodium carbonate adjusts pH value to 8.0~8.5, by zinc, copper, bismuth etc. after dissolving Solvable sulfate switchs to precipitate；
（4）Separation and washing：Step（3）After precipitation, by filtering Solid-Liquid Separation, filter cake step（1）In vain The water that 5~6 times of flue dust quality is washed twice, and filter cake is the dearsenification filter cake rich in valuable metal lead, arsenic content ＜ 0.5%, filter cake is enriched the valuable elements such as zinc, copper, bismuth, can make raw material direct marketing or be further used for the valuable member of separation and Extraction Element；Filtrate simultaneously becomes owner of production lime-molysite dearsenification system, need not increase disposal facility newly.
Step（4）Described to wash twice, the cleaning solution after second of washing for washing for the first time, after washing for the first time Cleaning solution is used for step（2）Dissolving.
The concentrated sulfuric acid that the concentrated sulfuric acid is purchased in market 98%.
Beneficial effects of the present invention：The present invention is due to using the concentrated sulfuric acid（98 acid）Direct acidification white cigarette dirt, equipment life Production capacity is big, effect is good, easy to operate, while concentrated sulfuric acid acidity is utilized by force and has the characteristics of oxidisability, to solve often Advise the low disadvantage of acid-hatching of young eggs arsenic dissolution rate.
Description of the drawings
Fig. 1 is the process flow chart of the embodiment of the present invention 1.
Specific implementation method
With reference to specific embodiment, the present invention is described in detail, but is not intended as the limit to the scope of the present invention System.
Embodiment 1
A kind of method of Copper making white cigarette dirt dearsenification, specifically comprises the following steps described in the present embodiment：
（1）Acidification：White cigarette dust main component is shown in Table shown in 1.1, takes 1 ton of the white cigarette dirt, and band sealing is added and stirs It mixes in the acidification slot of device, is computed, be 301kg by the theory acid amount that arsenic is converted into arsenic acid, based on 1.1 times, add 98% sulphur Sour 331kg starts blender after acid adding, 5 hours is stood after homogenizing；
1.1 white cigarette dust main component of table（Mass percentage %）
（2）Dissolving：Step（1）After acidification, 4 tons of water are added, normal-temperature operation carries out dissolving 1.0 under stirring Hour, mixing speed has relative flow with solid；
（3）It is heavy to return：Step（2）Reinforcing body sodium carbonate adjusts pH value to 8.0, by the solvable sulphur such as zinc, copper, bismuth after dissolving Hydrochlorate switchs to precipitate；
（4）Separation and washing：Step（3）After precipitation, mixture pump to filter is separated by solid-liquid separation, filter cake point It is not washed twice with 6 tons of clear water, cleaning solution is separately stored in leachate storage tank and waits for that next use, filter cake are to be rich in valuable metal The dearsenification slag of lead, arsenic content 0.48% are enriched the valuable elements such as zinc, copper, bismuth, can be used as raw material direct marketing or further In separation and Extraction valuable element；Filtrate simultaneously becomes owner of production lime-molysite dearsenification system, need not increase disposal facility newly.
Embodiment 2
A kind of method of Copper making white cigarette dirt dearsenification, specifically comprises the following steps described in the present embodiment：
（1）Acidification：White cigarette dust main component takes 1 ton of the white cigarette dirt as shown in table 2.1, and band sealing is added and stirs It mixes in the acidification slot of device, is computed, be 284kg by the theory acid amount that arsenic is converted into arsenic acid, based on 1.2 times, add 98% sulphur Sour 341kg starts blender after acid adding, 4 hours is stood after homogenizing；
2.1 white cigarette dust main component of table（Mass percentage %）
（2）Dissolving：Step（1）After acidification, 1 step of embodiment is added（4）In 5 tons of water of first time cleaning solution, often Temperature operation, carries out dissolving 1.5 hours, mixing speed has relative flow with solid under stirring；
（3）It is heavy to return：Step（2）Reinforcing body sodium carbonate adjusts pH value to 8.2, by the solvable sulphur such as zinc, copper, bismuth after dissolving Hydrochlorate switchs to precipitate；（4）Separation and washing：Step（3）After precipitation, mixture pump to filter is separated by solid-liquid separation, Filter cake 1 step of embodiment（4）Second of washing the progress first time washings of 5 tons of cleaning solution, then carry out second with 5 tons of clear water Secondary washing, cleaning solution are separately stored in leachate storage tank and wait for that next use, filter cake are the dearsenification slag rich in valuable metal lead, Arsenic content 0.26% is enriched the valuable elements such as zinc, copper, bismuth, can make raw material direct marketing or to be further used for separation and Extraction valuable Element；Filtrate simultaneously becomes owner of production lime-molysite dearsenification system, need not increase disposal facility newly.
Embodiment 3
A kind of method of Copper making white cigarette dirt dearsenification, specifically comprises the following steps described in the present embodiment：
（1）Acidification：White cigarette dust main component is shown in Table shown in 3.1, takes 1 ton of the white cigarette dirt, and band sealing is added and stirs It mixes in the acidification slot of device, is computed, be 269kg by the theory acid amount that arsenic is converted into arsenic acid, based on 1.15 times, add 98% Sulfuric acid 310kg starts blender after acid adding, 4.5 hours is stood after homogenizing；
3.1 white cigarette dust main component of table（Mass percentage %）
（2）Dissolving：Step（1）After acidification, 2 step of embodiment is added（4）In 4.5 tons of water of first time cleaning solution, Normal-temperature operation carries out dissolving 1 hour under stirring, and mixing speed has relative flow with solid；
（3）It is heavy to return：Step（2）Reinforcing body sodium carbonate adjusts pH value to 8.5, by the solvable sulphur such as zinc, copper, bismuth after dissolving Hydrochlorate switchs to precipitate；
（4）Separation and washing：Step（3）After precipitation, mixture pump to filter is separated by solid-liquid separation, filter cake is used 1 step of embodiment（4）The progress first time washings of 5 tons of second of cleaning solution, then carries out washing for the second time with 5.5 tons of clear water, washes It washs liquid and is separately stored in leachate storage tank and wait for next use, filter cake is the dearsenification slag rich in valuable metal lead, arsenic content 0.39%, the valuable elements such as zinc, copper, bismuth are enriched, raw material direct marketing can be made or be further used for separation and Extraction valuable element； Filtrate simultaneously becomes owner of production lime-molysite dearsenification system, need not increase disposal facility newly.

Claims (2)

1. a kind of method of Copper making white cigarette dirt dearsenification, which is characterized in that specifically comprise the following steps：
（1）Acidification：Copper making white cigarette dirt is mixed with the concentrated sulfuric acid, wherein the addition of the concentrated sulfuric acid is to convert the arsenic in white cigarette dirt It is 1.1~1.2 times of hydrogen ion theoretical amount needed for arsenic acid, 4~5h is acidified after mixing homogenizing；
（2）Dissolving：Step（1）It is dissolved in water after acidification, it is 4~5 ︰ 1 that liquid, which consolidates mass ratio, in terms of white cigarette dirt quality, and stirring is molten Solution, normal-temperature operation, dissolution time are 1~1.5 hour；
（3）It is heavy to return：Step（2）Reinforcing body sodium carbonate adjusts pH value to 8.0~8.5 after dissolving, is precipitated；
（4）Separation and washing：Step（3）After precipitation, by filtering Solid-Liquid Separation, filter cake step（1）White cigarette dirt The water that 5~6 times of quality is washed twice, and filter cake is dearsenification filter cake；Filtrate simultaneously becomes owner of production lime-molysite dearsenification system.
2. the method for Copper making white cigarette dirt dearsenification according to claim 1, which is characterized in that step（4）It is described to wash twice, For cleaning solution after second of washing for washing for the first time, the cleaning solution after washing for the first time is used for step（2）Dissolving.
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CN104593604A (en) * 2015-01-09 2015-05-06 紫金矿业集团股份有限公司 Process of recovering copper smelting waste acid and white smoke dusts
CN105463197A (en) * 2015-12-02 2016-04-06 昆明理工大学 Method for recycling valuable metal from copper smelting white smoke

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