CN105238939A - Pyrogenic process arsenic removing method and device - Google Patents
Pyrogenic process arsenic removing method and device Download PDFInfo
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- CN105238939A CN105238939A CN201510765933.4A CN201510765933A CN105238939A CN 105238939 A CN105238939 A CN 105238939A CN 201510765933 A CN201510765933 A CN 201510765933A CN 105238939 A CN105238939 A CN 105238939A
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Abstract
The invention provides a pyrogenic process arsenic removing method and a device, and belongs to the technical field of arsenic removal. A pyrogenic process comprises the following steps: A) black copper mud and a sulfur arsenic iron ore are mixed in proportion to obtain a mixture; B) the mixture is added in a furnace cavity of a rotary furnace through the furnace tail of the rotary furnace; and a hot air flow of 600-900 DEG C is introduced in the furnace cavity for heating the mixture to form mixed gas containing the hot air flow and an arsenic oxide; and C) the mixed gas is exhausted, and is cooled below 400 DEG C; and the arsenic oxide gas is condensed to form a solid to be separated from gas. The arsenic removing method has the advantages of higher arsenic recovery rate and low secondary pollution.
Description
Technical field
The present invention relates to dearsenic technique field, in particular to a kind of Fire arsenic removal method and device.
Background technology
Black copper mud be produce in copper metallurgy and cupric electrolysis technique containing arsenic waste, due to containing arsenic element, it is very easy to pollute, and therefore needs to carry out dearsenification process to waste.Black copper mud itself does not burn, dearsenification difficulty, and arsenic can not be removed by general arsenic removing method well, and at present, arsenic removing method mainly contains wet method dearsenication or Fire arsenic removal two class.Because black copper mud dearsenification difficulty is large, existing Fire arsenic removal rate is not high, arsenic also relatively large in the slag charge after general dearsenification, dearsenification weak effect.
Summary of the invention
The object of the present invention is to provide a kind of Fire arsenic removal method and device, realize the effect of high arsenic-removing rate.
The present invention is achieved in that
The invention provides a kind of method of Fire arsenic removal, comprise the following steps:
A kind of Fire arsenic removal method, comprises the following steps:
A) black copper mud is mixed according to weight ratio 10:3 ~ 2:3 with arsenical pyrite, obtained batch mixing;
B) described batch mixing is added in furnace chamber from the stove tail of rotary kiln, in furnace chamber, pass into the hot gas flow of 600 ~ 900 DEG C in order to heat described batch mixing by the burner of described rotary kiln, form the mixed gas of the oxide compound containing hot gas flow and arsenic;
C) in the stove tail exhausting of described rotary kiln, described mixed gas is discharged by the stove tail of described rotary kiln, afterwards described mixed gas is cooled to less than 400 DEG C, the oxide gas of described arsenic is made to solidify formation solid, make described hot gas flow form low temperature combustion gas, then be separated and collect described low temperature combustion gas and described solid respectively.
In above-mentioned arsenic removing method, select arsenical pyrite be Fire arsenic removal join ore deposit, after it is mixed with black copper mud, by heating, the arsenic that in black copper mud, molten boiling point is lower can distil and separates out and generate white arsenic gas with oxygen reaction, thus be separated with solid material, then reclaim through discharging, cooling, be solidified as solid, finally realize dearsenification.
Wherein, after arsenical pyrite heating, there is certain magnetic, the metal ingredient in black copper mud can be adsorbed, play the effect of the metallics in sorting black copper mud, prevent these metallic elements separated and cause the problem that the arsenic purity be separated declines.
Because black copper mud itself does not burn, heating difficulty is large, there is following problem: temperature is too low, and the arsenic in black copper mud cannot depart from, and can not reach the effect of separation when therefore heating separately black copper mud; Temperature is too high, and in black copper mud, arsenic is wrapped up by other element, also cannot depart from, thus does not reach the effect of separation.The temperature of combustion of arsenical pyrite is relatively low, and by being mixed into arsenical pyrite, the arsenical pyrite of burning plays effect that is combustion-supporting, heat transfer, does not need too high temperature can carry out melting to black copper mud.
Containing a certain amount of arsenic, metallic element in black copper mud, and under the high temperature conditions, arsenic and metallic element react, and are unfavorable for the distillation of arsenic, precipitation, and then cause and decline to the separating effect of arsenic in black copper mud.Metallic element in sulphur in arsenical pyrite and black copper mud reacts, metallic element can be consumed, thus reduce the amount of the arsenic reacted with metallic element to a certain extent, arsenic more exists with elemental, then separated by heating sublimation formation gas and solid material, and export outside rotary kiln with air-flow.
As can be seen here, the method for above-mentioned Fire arsenic removal, by adding arsenical pyrite, avoids arsenic easily by the problem of other element parcel in black copper mud, raising heat transfer effectiveness, is beneficial to the volatilization of arsenic.In addition, arsenical pyrite can reduce the amount that in black copper mud, arsenic simple substance and metallic element react so that more arsenic exists with the form of simple substance, be gas by distillation and with the oxygen reaction in rotary kiln, thus to be separated with black copper mud solid.Therefore, compared with existing arsenic removing method, arsenic-removing rate of the present invention improves.
Preferably, in arsenical pyrite, Gold Content is not less than 4g/ ton, arsenic content is not less than 200kg/ ton, there is in arsenical pyrite a certain amount of gold, also containing gold in slag charge then after the dearsenification of black copper mud, slag charge contains valuation metal, slag charge reclaims factory, the receiving degree of smeltery to it is high, can improve the value of slag charge, be conducive to the cost recovery of Fire arsenic removal.In addition, the raising of arsenic content, then in arsenical pyrite, the component content of impurity is relatively less, then, after refining ore deposit, the yield of arsenic is large, can improve the output of unit consumption of energy.
Preferably, before described black copper mud mixes with described arsenical pyrite, all through pulverization process and/or drying treatment.
After pulverization process, the grain diameter of black copper mud and sulphur arsenic iron reduces, and after mixing, both can contact more fully.During high melt, the efficiency can carrying out heat trnasfer is between the two higher, and black copper mud is heated more abundant, contacts with each other and carries out chemical reaction, thus be more conducive to the precipitation of arsenic both being conducive to.In addition the contact area between black copper mud and arsenical pyrite improves greatly, and chemical reaction more easily carries out, and the reaction precipitation effect of arsenic is better.After drying treatment, the moisture in black copper mud and sulphur arsenic iron is removed, and reduces the pyrolytic damage that moisture evaporation causes, also can reduce the impact of moisture on chemical reaction simultaneously.
Preferably, also comprise after described mixed gas discharges described rotary kiln He before described cooling: carry out filtration treatment.The solid matter of sweeping along in mixed airflow step and being filtered after filtration, can prevent the oxide compound of the arsenic of itself and cooled and solidified from mixing, improve the purity of the arsenic reclaimed.
Preferably, also comprise: the described low temperature combustion gas of collecting is passed in alkaline absorption solution.The oxide compound of the arsenic carried in absorption liquid and low temperature combustion gas reacts, and prevents the oxide compound of arsenic from discharging and polluted air, also can absorb certain sulfur oxide composition simultaneously, prevent the pollution of sour gas.
Preferably, described hot gas flow is burnt by coking coal and water-gas burning generation.Coking coal is mainly in order to produce high temperature heat source, and its temperature relative difficult controls; Water-gas then produces the lower thermal source of temperature, and the controllability of its temperature is higher.By the mode of water-gas and coking coal combustion heating, the controllability to temperature when black copper mud and arsenical pyrite heating can be improved, can for the specific nature adjustment temperature of rotary kiln charging.
Present invention also offers the Fire arsenic removal device for implementing above-mentioned Fire arsenic removal method, comprising: induced draft fan, feeder, rotary kiln, thermal generator assembly for generation of described hot gas flow, cooling room and the dust chamber for the oxide solid that reclaims arsenic;
Described thermal generator assembly is connected by the burner of pipeline with described rotary kiln, described dust chamber is connected with the stove tail of described rotary kiln by described cooling storehouse, described feeder is connected with the stove tail of described rotary kiln, and described induced draft fan is connected with the stove tail of described rotary kiln.
Through being added in rotary kiln by feeder after black copper mud and arsenical pyrite mix, and carry out the melting of high temperature in rotary kiln.Heat(ing)generator produces high-temperature gas and is injected in revolution, in order to heat black copper mud and arsenical pyrite.The suction function of induced draft fan, makes the air-flow forming motion in rotary kiln, is conducive to separated arsenic to output to outside rotary kiln.
Black copper mud in rotary kiln and arsenical pyrite raw material are heated, and wherein the distillation of arsenic simple substance forms the oxide compound of arsenic for arsenic gas and combination with oxygen, and derive through the stove tail of rotary kiln along with the air-flow moved, and are passed in cooling room subsequently.Enter the mixed gas in cooling room, constantly travel forward heat dissipation simultaneously, and then reduce temperature.Along with the continuous decline of mixed gas temperature, the oxide compound of arsenic is constantly cooled to solid and gas phase separation, when mixed gas enters dust chamber, wherein the oxide compound of arsenic is condensed into solid in a large number, disengaging gas phase falls in dust chamber and is collected, and gas phase then can carry out discharging or collecting carrying out reprocessing.
Preferably, also comprise: sack cleaner, described sack cleaner is arranged between the stove tail of described rotary kiln and described cooling room, and the described mixed gas that the stove tail through described rotary kiln exports is successively by entering described dust chamber after described sack cleaner, described cooling room.
Owing to containing other solid particulate matter a certain amount of in the mixed gas of discharge.Directly carry out cooling to reclaim, then the oxide compound of solid particulate matter and arsenic may be caused to mix, cause the oxide compound purity being separated the arsenic obtained to decline.The oxide compound of the arsenic of the solid particulate, dust and the gaseous state that carry in air-flow then can be carried out initial gross separation by sack cleaner, thus greatly reduces the solid impurity contained in gas phase.
Preferably, be loaded with the cuvette of alkaline absorption solution, described cuvette is used for: absorb described low temperature combustion gas.After entering overcooling process, the oxide compound of the arsenic in hot gas flow is separated, gas discharges, but, based on the consideration of environmental protection, gas is passed in cuvette, the oxide compound of unsegregated for minority arsenic, other sour gas and heavy metal oxide and absorption liquid can be interacted, after chemical reaction is removed, and with the content of emissions reduction contaminants in gas, makes its meet the requirement of environmental protection.
Preferably, also comprise: temperature sensor, described temperature sensor is arranged at described rotary kiln, described thermal generator assembly comprises coking coal roasting kiln and blue-gas generator, described blue-gas generator comprises the sweating room and char combustion room that are interconnected, and described coking coal roasting kiln is connected with the burner of described rotary kiln respectively by the pipeline being provided with variable valve with described blue-gas generator.
Water-gas mainly comprises carbon monoxide and hydrogen, is produced by blue-gas generator, and the temperature of the high-temperature gas that its burning produces is relatively low, but the controllability of temperature is high.Sweating room in blue-gas generator produces water vapor by boiler, is then passed in coke combustion chamber by water vapour, contacts with high temperature coke, form water-gas by coal gasification reaction.
The high-temperature gas that coking coal burning produces, but its temperature-controllable is relatively low, passes in rotary kiln by this high-temperature gas, heats black copper mud and arsenical pyrite, then and the Heating temperature controllability in rotary kiln is poor.Therefore, supplementing of the high-temperature gas that water-gas can be utilized to produce as coking coal burning, both cooperatively interact, and the amount of the high-temperature gas produced by the water-gas in control inputs rotary kiln and coking coal burning carrys out regulating and controlling temperature.
Temperature sensor detects the temperature in rotary kiln, and according to the temperature detected, the amount of the high-temperature gas exported by open/close adjustment water-gas and the coking coal burning of variable valve, to realize the accurate control to temperature.When temperature requirement is lower, the variable valve can cutting out water-gas machine stops exporting water-gas; When temperature requirement is higher, can the variable valve of open water coal-gas producer, water-gas is provided, detects the temperature in rotary kiln by temperature sensor simultaneously, so that the work output of adjustment water-gas in time.
Preferably, rotating mechanism, described rotating mechanism comprise motor, rotating shaft, driving gear and be sheathed on outside described rotary kiln by moving gear, one end of described rotating shaft is connected with described motor, the other end of described rotating shaft is connected with described driving gear, described driving gear engages by moving gear with described, the vertical height being vertically highly greater than the burner of described rotary kiln of the stove tail of described rotary kiln.There is certain difference of altitude in the two ends due to rotary kiln, then, in the rotation process of rotary kiln, mineral aggregate can be output to outside rotary kiln gradually, is conducive to the ability of working continuously improving rotary kiln.
Beneficial effect of the present invention:
The invention provides a kind of Fire arsenic removal method, in order to carry out dearsenification process to black copper mud.The method utilizes arsenical pyrite to join ore deposit as black copper mud, significantly can lower the temperature during melting of black copper mud, prevent ore conglomeration, can also reduce the content of chemical combination state arsenic simultaneously, be beneficial to the precipitation of arsenic simple substance, the arsenic-removing rate of black copper mud is improved greatly.The arsenic that the method reclaims can directly be recycled, and slag charge can be recycled by copper works etc.The technical costs of Fire arsenic removal method provided by the invention is low, and the black copper mud through Fire arsenic removal can resource reutilization, turns waste into wealth, reclaims certain cost simultaneously.By the arsenic that this Fire arsenic removal technology reclaims, can directly reclaim or export, decrease the trouble of subsequent disposal.The raw material used in the present invention, equipment use comparatively general in existing ore smelting process, therefore, greatly reduce the use cost of equipment and raw material, have good economy.In the treating processes of black copper mud, do not need the arsenic of recovery and slag charge all can carry out recycle, do not need to use the pharmaceutical chemicals easily polluted, effluent discharge is few, thus makes this Fire arsenic removal technology have the good feature of environmental protection.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment below, be to be understood that, the following drawings illustrate only some embodiment of the present invention, therefore the restriction to scope should be counted as, for those of ordinary skill in the art, under the prerequisite not paying creative work, other relevant accompanying drawings can also be obtained according to these accompanying drawings.
The schema of the Fire arsenic removal method that Fig. 1 provides for the embodiment of the present invention 4.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Therefore, below to the detailed description of the embodiments of the invention provided in the accompanying drawings and the claimed scope of the present invention of not intended to be limiting, but selected embodiment of the present invention is only represented.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
Present embodiments provide a kind of Fire arsenic removal device, for the treatment of black copper mud to be separated arsenic element wherein.Fire arsenic removal device comprises: induced draft fan, feeder, rotary kiln, thermal generator assembly for generation of hot gas flow, cooling room and the dust chamber for the oxide solid that reclaims arsenic.
Thermal generator assembly is connected with the burner of rotary kiln by pipeline, and dust chamber is connected with the stove tail of rotary kiln by cooling storehouse, and feeder is connected with the stove tail of rotary kiln, and induced draft fan is connected with the stove tail of rotary kiln.
Utilize the use flow process of this Fire arsenic removal device to the dearsenification of black copper mud as follows:
Black copper mud and arsenical pyrite are mixed according to required part by weight, is then input in the furnace chamber of rotary kiln by feeder by stove tail.Induced draft fan and thermal generator assembly work, the hot gas flow that thermal generator assembly produces is introduced in furnace chamber, and to black copper mud and arsenical pyrite heating.Hot gas flow moves to stove tail gradually and derives outside furnace chamber, and the oxide gas of the arsenic simultaneously produced in raw material is also derived in the lump to enter in cooling room outside furnace chamber and cooled, and solidify and form solid and gas phase separation and collect in dust chamber, warm air is then discharged.On the other hand, the raw material in the furnace chamber of rotary kiln forms slag charge and then discharges after melting.
Embodiment 2
Present embodiments provide a kind of Fire arsenic removal device, for the treatment of black copper mud to be separated arsenic element wherein.Fire arsenic removal device comprises: rotating mechanism, induced draft fan, feeder, rotary kiln, thermal generator assembly for generation of hot gas flow, cooling room and the dust chamber for the oxide solid that reclaims arsenic.
Thermal generator assembly is connected with the burner of rotary kiln by pipeline, and dust chamber is connected with the stove tail of rotary kiln by cooling storehouse, and feeder is connected with the stove tail of rotary kiln, and induced draft fan is connected with the stove tail of rotary kiln.Rotating mechanism comprise motor, rotating shaft, driving gear and be sheathed on outside rotary kiln by moving gear, one end of rotating shaft is connected with motor, and the other end of rotating shaft is connected with driving gear, and driving gear engages with by moving gear.
Rotary kiln has certain angle of inclination, the vertical height being vertically highly greater than its burner of its stove tail.Material moves to burner lentamente by the rotation of rotary kiln and obliquity, is drawn off after entering pyroprocessing by one end of burner.Material is discharged gradually in the working process of rotary kiln, makes rotary kiln can continuously feeding, improves its non-stop run ability.
Rotary kiln as the main melting environment of process black copper mud, its be a kind of for calcining, the Thermal Equipment of roasting or dried material.The body of heater of rotary kiln is generally the steel drum of long section, and body of heater is bearing in several on support roller, and body of heater drives slow circumvolve by gear by electric motor.Multiple layer refractory brick is set in furnace chamber, to improve the heat-resisting ability of the body of heater of body of heater, prevents body of heater to be subject to high temperature and the problem damaged.Burner end sprays into the high-temperature gas that fuel combustion produces, and the waste gas after burning is exported by stove tail end.The countercurrent flow in furnace chamber of pending material and high temperature gas flow, carries out heat exchange by contacting with each other.It is widely used in calcination of cement clinker in Cement industry, refractory materials, for ceramic industry calcining granular and pulverulent material, and in above-mentioned industry dry various raw material.
In the present embodiment, induced draft fan plays and produces drainage, wind-guiding effect, and bleeding of induced draft fan directly acts on the furnace chamber of rotary kiln, makes wherein to produce by the movement air flow of burner to stove tail.Thermal generator assembly produces high-temperature gas and enters in furnace chamber by burner, simultaneously to heating material in furnace chamber, and moves to stove wake flow gradually, enters dust chamber after discharging furnace chamber by cooling room.Material is wherein delivered to burner by body of heater gradually that rotate, then discharges formation slag.
Utilize the use flow process of this Fire arsenic removal device to the dearsenification of black copper mud as follows:
Black copper mud and arsenical pyrite are mixed according to required part by weight, is then input in the furnace chamber of rotary kiln by feeder by stove tail.
Induced draft fan and thermal generator assembly work, the hot gas flow that thermal generator assembly produces is introduced in furnace chamber, and to black copper mud and arsenical pyrite heating.Meanwhile, rotary kiln rotates, and to stir black copper mud and arsenical pyrite, improves the homogeneity of being heated.
Hot gas flow moves to stove tail gradually and derives outside furnace chamber, and the oxide gas of the arsenic simultaneously produced in raw material is also derived in the lump to enter in cooling room outside furnace chamber and cooled.The mixed gas be made up of the oxide gas of warm air and arsenic, travel forward at cooling room, in the process of motion, its heat natural dissipation, temperature decline gradually, wherein the oxide gas of arsenic solidifies formation solid because of cooling, thus automatically and gas phase separation collecting in dust chamber, warm air is then discharged.On the other hand, the raw material in the furnace chamber of rotary kiln forms slag charge after melting, is discharged by burner along with the rotation of rotary kiln.
If when needing to stop operation, first stop charging, continue the furnace temperature keeping rotary kiln certain, after material is all discharged in stove, stop input hot gas flow.Rotary kiln body of heater, completely before cooling, does not continue to rotate rotary kiln, and prevent from being heated inequality and deforming.
Embodiment 3
Present embodiments provide a kind of Fire arsenic removal device, for the treatment of black copper mud to be separated arsenic element wherein.Fire arsenic removal device comprises: rotating mechanism, induced draft fan, feeder, rotary kiln, thermal generator assembly for generation of hot gas flow, cooling room and the dust chamber for the oxide solid that reclaims arsenic, thermal generator assembly is connected with the burner of rotary kiln by pipeline, dust chamber is connected with the stove tail of rotary kiln by cooling storehouse, feeder is connected with the stove tail of rotary kiln, and induced draft fan is connected with the stove tail of rotary kiln.
Rotating mechanism comprise motor, rotating shaft, driving gear and be sheathed on outside rotary kiln by moving gear, one end of rotating shaft is connected with motor, and the other end of rotating shaft is connected with driving gear, and driving gear engages with by moving gear.
The vertical height being vertically highly greater than its burner of the stove tail of rotary kiln, forms certain angle of inclination, is beneficial to the discharge after material process, thus can improve the ability of working continuously of this Fire arsenic removal device.
Under being in hot conditions all the time in rotary kiln, working long hours and can cause thermal shocking to rotary kiln, cause the damage of rotary kiln body of heater.In addition, the material of black copper mud and arsenical pyrite, can produce certain corrosion to rotary kiln under the high temperature conditions, and then causes shorten the work-ing life of rotary kiln.
For above-mentioned situation, Fire arsenic removal device also comprises: fire proofing tile, and fire proofing tile is arranged at the inwall of rotary kiln.Fire proofing tile is set by the furnace wall at rotary kiln, the damage of thermal shocking to rotary kiln furnace wall can be reduced, but also various element can be prevented in high temperature gas flow and pending ore deposit the corrosion of rotary kiln furnace wall.
In order to improve the controllability of the furnace chamber temperature of rotary kiln, thermal generator assembly adopts coking coal roasting kiln and blue-gas generator to coordinate the mode of heating.Particularly, device also comprises: temperature sensor, and temperature sensor is arranged at rotary kiln.Thermal generator assembly comprises coking coal roasting kiln and blue-gas generator, and blue-gas generator comprises the sweating room and char combustion room that are interconnected, and coking coal roasting kiln is connected with the burner of blue-gas generator respectively by the pipeline with rotary kiln that are provided with variable valve.
Coking coal roasting kiln provides the main heating source of melting black copper mud; Water-gas then as temperature-controlling component, the thermal source that temperature is relatively low.The hot gas that coking coal burning produces is connected with the burner of rotary kiln by pipeline, and in blue-gas generator, the water vapour that sweating room produces passes into char combustion room, produces water-gas and is passed in rotary kiln by pipeline.
Detected the temperature of rotary kiln by temperature sensor, when the temperature requirement in rotary kiln is lower, close the variable valve be connected with blue-gas generator, water-gas stops carrying in rotary kiln, directly utilizes coking coal roasting kiln to produce hot gas flow and heats.When the temperature requirement in rotary kiln is higher, coking coal roasting kiln and blue-gas generator work simultaneously, provide hot gas flow.The hot air temperature produced due to water-gas burning is relatively low, and the temperature-controllable of its hot gas flow produced is higher.Whether water-gas is passed into rotary kiln by the open/close of regulating and controlling valve, thus trickleer regulation and control are carried out to the temperature in rotary kiln, thus improve the use handiness of Fire arsenic removal device.When continuous process black copper mud, can according to the character of black copper mud and arsenical pyrite, change the amount of the warm air of input selectively, make the dearsenification better effects if to black copper mud, energy consumption controls more accurate.
Blue-gas generator is made up of sweating room and char combustion room, and sweating room utilizes boiler combustion to produce water vapour, reacts with high temperature coke by being passed into by water vapor in coke combustion chamber, thus forms water-gas.
Owing to there will be some heavy metal particles, sour gas, pollutent in the process of melting black copper mud, therefore, based on the consideration of environmental protection, the tail gas to rotary kiln is discharged is needed to carry out aftertreatment, to reduce final pollutant discharge amount.
Particularly, Fire arsenic removal device also comprises: sack cleaner, and sack cleaner is arranged between the stove tail of rotary kiln and cooling room, and the mixed gas that the stove tail through rotary kiln exports is successively by entering dust chamber after sack cleaner, cooling room.
Containing other solid particle polluters a certain amount of in the air-flow of being discharged by the stove tail of rotary kiln, air-flow is by after sack cleaner, the solid particulate carried in air-flow, dust are separated with the oxide gas of arsenic, the solid impurity contained in hot gas flow greatly reduces, thus can guarantee that the oxide compound of arsenic solidifies, can not mix with dust and solid particulate matter when separating out.
Through the gas after reclaiming indoor cooling process, the oxycompound, sulfide etc. of some arsenic wherein may be contained.If directly discharge, may cause the pollution to environment.Therefore, Fire arsenic removal device also comprises the cuvette being loaded with alkaline absorption solution, and the gas that the oxide compound of arsenic is separated passes into alkaline absorption solution.By the chemical reaction of basic solution and oxide compound, the oxide compound etc. of sulfide wherein, arsenic is disposed, thus keep the content meet the requirement of environmental protection of the exhaust pollutant of discharging.
Utilize the use flow process of this Fire arsenic removal device to the dearsenification of black copper mud as follows:
Black copper mud and arsenical pyrite are mixed according to required part by weight, is then passed in the furnace chamber of rotary kiln by stove tail.
Induced draft fan and thermal generator assembly work, the hot gas flow that thermal generator assembly produces is introduced in furnace chamber, and to black copper mud and arsenical pyrite heating.
Warm air moves gradually and derives outside furnace chamber, and the oxide gas of the arsenic simultaneously produced in raw material is also derived outside furnace chamber in the lump to be entered in sack cleaner.Gas after dedusting enters in cooling room, and because gas heat cooling indoor sport while constantly dissipates, its temperature reduces gradually, and the oxide gas of arsenic is constantly lowered the temperature and is frozen into solid.
The oxide solid of arsenic is collected in dust chamber, gas after separation is passed in cuvette, with alkali lye generation chemical reaction, thus the oxide compound of sulfide wherein, arsenic and other impurity substances absorbed, the less gas of pollutant load then can discharge.Raw material in rotary kiln furnace chamber forms slag charge after melting, is discharged by burner along with the rotation of rotary kiln.Preferably, before discharge air, is reduced the temperature of the gas run out of by spray water, also makes wherein dust water suction, reunion and being collected simultaneously, thus can further emissions reduction to the pollutent in air.
Embodiment 4
Present embodiments provide a kind of Fire arsenic removal device utilizing embodiment 2 to provide to the method for black copper mud dearsenification, comprise the following steps, consult Fig. 1.
First, 5 tons, black copper mud is mixed with sulphur arsenic iron 5 tons, with obtained compound.
Secondly, compound is input in the furnace chamber of rotary kiln by the stove tail of rotary kiln, is produced the warm air of 700 DEG C by thermal generator assembly, and imported in the furnace chamber of rotary kiln by burner by induced draft fan.
Again, under the condition of 700 DEG C, the hot gas flow in rotary kiln, after 2.5 hours, is discharged by stove tail by heating raw materials, through sack cleaner removing particulate contaminant, then enter cooling room cooling.The oxide gas of arsenic is cooled to less than 400 DEG C gradually, and the oxide compound cooling condensation of arsenic a large amount of after entering dust chamber forms particle and is separated from gas phase, and gas phase is passed in cuvette and discharges after alkali liquor absorption.Raw material in rotary kiln, after melting, is formed slag charge, and is discharged by burner by the rotation of rotary kiln.
In the present embodiment, black copper mud is containing, for example the composition of lower weight ratio: water 5%, copper 44.25%, arsenic 14.3%.Sulphur arsenic iron is containing, for example the composition of lower weight ratio: water 11%, iron 48%, arsenic 20%, copper 0.5%, gold 4 grams.After mixing, copper 23.09 KWhs/ton in batch mixing, arsenic 17.05 KWhs/ton, gold 1.93 grams/ton.
After dearsenification process, in the solid collected in dust chamber, white arsenic content reaches 97%, and the rate of recovery of arsenic reaches 92.4%.Slag charge weighs 7.7 tons, wherein cupric 24.4% (weight), containing arsenic 1.5% (weight), containing gold 2.48 grams/ton.
As a comparison, when carrying out melting process after 700 DEG C of meltings with black copper sludge 2.5 hours, in slag charge, arsenic content was 7 KWhs/ton.
Embodiment 5
Present embodiments provide a kind of Fire arsenic removal device utilizing embodiment 2 to provide to the method for black copper mud dearsenification, comprise the following steps.
First, 5 tons, black copper mud is mixed with 5 sulphur arsenic iron tons, with obtained compound.
Secondly, compound is input in the furnace chamber of rotary kiln by the stove tail of rotary kiln, is produced the warm air of 800 DEG C by thermal generator assembly, and imported in the furnace chamber of rotary kiln by burner by induced draft fan.
Again, under the condition of 800 DEG C, the hot gas flow in rotary kiln, after 2.5 hours, is discharged by stove tail by heating raw materials, through sack cleaner removing particulate contaminant, then enter in dust chamber.In dust chamber, the oxide compound of arsenic is cooled to less than 400 DEG C, and the condensation of lowering the temperature gradually of the oxide compound of arsenic forms particle and is separated from gas phase, and gas phase is passed in cuvette and discharges after alkali liquor absorption.Raw material in rotary kiln, after melting, is formed slag charge, and is discharged by burner by the rotation of rotary kiln.
Black copper mud is containing, for example the composition of lower weight ratio: water 5%, copper 44.25%, arsenic 14.3%.Sulphur arsenic iron is containing, for example the composition of lower weight ratio: water 11%, iron 48%, arsenic 20%, copper 0.5%, gold 4 grams.
After dearsenification process, the rate of recovery of arsenic reaches 96%.Slag charge weighs 6.8 tons, wherein copper 31.08 KWhs/ton, copper recovery 99.47%, arsenic 0.87 KWh/ton, gold 3 grams/ton.
As a comparison, when carrying out melting process after 800 DEG C of meltings with black copper sludge 2.5 hours, in slag charge, arsenic content was 6 KWhs/ton.
Embodiment 6
Present embodiments provide a kind of Fire arsenic removal device utilizing embodiment 2 to provide to the method for black copper mud dearsenification, comprise the following steps.
First, 5 tons, black copper mud is mixed with sulphur arsenic iron 5 tons, with obtained compound.
Secondly, compound is input in the furnace chamber of rotary kiln by the stove tail of rotary kiln, is produced the warm air of 600 DEG C by thermal generator assembly, and imported in the furnace chamber of rotary kiln by burner by induced draft fan.
Again, under the condition of 600 DEG C, the hot gas flow in rotary kiln, after 2.5 hours, is discharged by stove tail by heating raw materials, through sack cleaner removing particulate contaminant, then enter cooling room cooling.The oxide gas of arsenic is cooled to less than 400 DEG C gradually, and the oxide compound cooling condensation of arsenic a large amount of after entering dust chamber forms particle and is separated from gas phase, and gas phase is passed in cuvette and discharges after alkali liquor absorption.Raw material in rotary kiln, after melting, is formed slag charge, and is discharged by burner by the rotation of rotary kiln.
In the present embodiment, black copper mud is containing, for example the composition of lower weight ratio: water 5%, copper 44.25%, arsenic 14.3%.Sulphur arsenic iron is containing, for example the composition of lower weight ratio: water 11%, iron 48%, arsenic 20%, copper 0.5%, gold 4 grams.After mixing, copper 23.09 KWhs/ton in batch mixing, arsenic 17.05 KWhs/ton, gold 1.93 grams/ton.
After dearsenification process, in the solid collected in dust chamber, white arsenic content reaches 97%, and the rate of recovery of arsenic reaches 76.85%.Slag charge weighs 8.1 tons, wherein cupric 24.4% (weight), containing arsenic 4.2% (weight), containing gold 2.48 grams/ton.
As a comparison, when carrying out melting process after 600 DEG C of meltings with black copper sludge 2.5 hours, in slag charge, arsenic content was 8 KWhs/ton.
Embodiment 7
Present embodiments provide a kind of Fire arsenic removal device utilizing embodiment 2 to provide to the method for black copper mud dearsenification, comprise the following steps.
First, 10 tons of black copper mud are mixed with 3 tons of sulphur arsenic iron, with obtained compound.
Secondly, compound is input in the furnace chamber of rotary kiln by the stove tail of rotary kiln, is produced the warm air of 900 DEG C by thermal generator assembly, and imported in the furnace chamber of rotary kiln by burner by induced draft fan.
Again, under the condition of 900 DEG C, the hot gas flow in rotary kiln, after 2.5 hours, is discharged by stove tail by heating raw materials, through sack cleaner removing particulate contaminant, then successively by cooling room, dust chamber.In cooling room, the oxide compound of arsenic is cooled to less than 400 DEG C, the oxide compound of arsenic lower the temperature gradually condensation formed particle is separated from gas phase and with dust chamber in collect, gas phase is passed into that cuvette is interior to be discharged after alkali liquor absorption.Raw material in rotary kiln, after melting, is formed slag charge, and is discharged by burner by the rotation of rotary kiln.
After dearsenification process, the rate of recovery of arsenic reaches 97.22%.Slag charge weighs 6.4 tons, wherein copper 32.8 KWhs/ton, arsenic 0.68 KWh/ton, gold 3.15 grams/ton.As a comparison, when carrying out melting process after 900 DEG C of meltings with black copper sludge 2.5 hours, in slag charge, arsenic content was 6 KWhs/ton.
Embodiment 8
Present embodiments provide a kind of Fire arsenic removal device utilizing embodiment 2 to provide to the method for black copper mud dearsenification, comprise the following steps.
First, 4 tons of black copper mud are mixed with 6 tons of sulphur arsenic iron, with obtained compound.
Secondly, compound is input in the furnace chamber of rotary kiln by the stove tail of rotary kiln, is produced the warm air of 700 DEG C by thermal generator assembly, and imported in the furnace chamber of rotary kiln by burner by induced draft fan.
Again, under the condition of 700 DEG C, the hot gas flow in rotary kiln, after 2.5 hours, is discharged by stove tail by heating raw materials, through sack cleaner removing particulate contaminant, then enter in dust chamber.In dust chamber, the oxide compound of arsenic is cooled to less than 400 DEG C, and the condensation of lowering the temperature gradually of the oxide compound of arsenic forms particle and is separated from gas phase, and gas phase is passed in cuvette and discharges after alkali liquor absorption.Raw material in rotary kiln, after melting, is formed slag charge, and is discharged by burner by the rotation of rotary kiln.
Black copper mud is containing, for example the composition of lower weight ratio: water 5%, copper 44.25%, arsenic 14.3%.Sulphur arsenic iron is containing, for example the composition of lower weight ratio: water 11%, iron 48%, arsenic 20%, copper 0.5%, golden 4g.
After dearsenification process, finally obtain slag charge 9.14 tons, containing arsenic 0.8 KWh/ton, cupric 24.8 KWhs/ton, gold 3.06 grams/ton.The rate of recovery of arsenic reaches 96.6%.
As a comparison, when carrying out melting process after 700 DEG C of meltings with black copper sludge 2.5 hours, in slag charge, arsenic content was 7 KWhs/ton.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a Fire arsenic removal method, is characterized in that, comprises the following steps:
A) black copper mud is mixed according to weight ratio 10:3 ~ 2:3 with arsenical pyrite, obtained batch mixing;
B) described batch mixing is added in furnace chamber from the stove tail of rotary kiln, in furnace chamber, pass into the hot gas flow of 600 ~ 900 DEG C in order to heat described batch mixing by the burner of described rotary kiln, form the mixed gas of the oxide compound containing hot gas flow and arsenic;
C) in the stove tail exhausting of described rotary kiln, described mixed gas is discharged by the stove tail of described rotary kiln, afterwards described mixed gas is cooled to less than 400 DEG C, the oxide gas of described arsenic is made to solidify formation solid, make described hot gas flow form low temperature combustion gas, then be separated and collect described low temperature combustion gas and described solid respectively.
2. Fire arsenic removal method according to claim 1, is characterized in that, before described black copper mud mixes with described arsenical pyrite, all through pulverization process and/or drying treatment.
3. Fire arsenic removal method according to claim 1 and 2, is characterized in that, also comprises after described mixed gas discharges described rotary kiln He before described cooling: carry out filtration treatment.
4. Fire arsenic removal method according to claim 1, is characterized in that, also comprise: the described low temperature combustion gas of collecting passed in alkaline absorption solution.
5. Fire arsenic removal method according to claim 1, is characterized in that, described hot gas flow is burnt by coking coal and water-gas burns produces.
6. one kind for implementing the claims the device of the Fire arsenic removal method described in 1, it is characterized in that, comprising: induced draft fan, feeder, rotary kiln, thermal generator assembly for generation of described hot gas flow, cooling room and the dust chamber for the oxide solid that reclaims arsenic;
Described thermal generator assembly is connected by the burner of pipeline with described rotary kiln, described dust chamber is connected with the stove tail of described rotary kiln by described cooling storehouse, described feeder is connected with the stove tail of described rotary kiln, and described induced draft fan is connected with the stove tail of described rotary kiln.
7. Fire arsenic removal device according to claim 6, it is characterized in that, also comprise: sack cleaner, described sack cleaner is arranged between the stove tail of described rotary kiln and described cooling room, and the described mixed gas that the stove tail through described rotary kiln exports is successively by entering described dust chamber after described sack cleaner, described cooling room.
8. Fire arsenic removal device according to claim 6, it is characterized in that, also comprise: the cuvette being loaded with alkaline absorption solution, described cuvette is used for: absorb described low temperature combustion gas.
9. Fire arsenic removal device according to claim 6, it is characterized in that, also comprise: temperature sensor, described temperature sensor is arranged at described rotary kiln, described thermal generator assembly comprises coking coal roasting kiln and blue-gas generator, described blue-gas generator comprises the sweating room and char combustion room that are interconnected, and described coking coal roasting kiln is connected with the burner of described rotary kiln respectively by the pipeline being provided with variable valve with described blue-gas generator.
10. Fire arsenic removal device according to claim 6, it is characterized in that, also comprise: rotating mechanism, described rotating mechanism comprise motor, rotating shaft, driving gear and be sheathed on outside described rotary kiln by moving gear, one end of described rotating shaft is connected with described motor, the other end of described rotating shaft is connected with described driving gear, and described driving gear engages by moving gear with described, the vertical height being vertically highly greater than the burner of described rotary kiln of the stove tail of described rotary kiln.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111394570A (en) * | 2020-04-24 | 2020-07-10 | 湖南金马冶金技术开发有限公司 | External heating rotary furnace dearsenification device |
| CN113549755A (en) * | 2020-11-12 | 2021-10-26 | 广东天源环境科技有限公司 | Equipment and method for dearsenifying high-arsenic metal mineral powder with preheated smoke flowing at 360 degrees |
| CN114410969A (en) * | 2021-12-30 | 2022-04-29 | 济源豫光有色冶金设计研究院有限公司 | Method for recycling copper and arsenic from black copper mud step by step |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101306804A (en) * | 2007-05-16 | 2008-11-19 | 洛阳栾川钼业集团冶炼有限责任公司 | Process for preparing acid from flue gas by calcining molybdenum concentrate in rotary kiln |
| CN201254529Y (en) * | 2008-09-01 | 2009-06-10 | 黄新春 | Cement clinker calcination system |
| CN102875036A (en) * | 2012-10-24 | 2013-01-16 | 石家庄市新华工业炉有限公司 | Heat storage type lime rotary kiln |
| CN103288133A (en) * | 2012-02-27 | 2013-09-11 | 兰州理工大学 | Method for preparing arsenic trioxide from black copper sludge |
| CN103290221A (en) * | 2012-02-28 | 2013-09-11 | 兰州理工大学 | Method for recovering copper, arsenium and antimony from black copper sludge |
| CN103710532A (en) * | 2014-01-22 | 2014-04-09 | 安徽工业大学 | Method for performing microwave arsenic removal on high-arsenic iron ore |
| CN104108891A (en) * | 2014-07-14 | 2014-10-22 | 中国中材国际工程股份有限公司 | White cement clinker bleaching device and process |
-
2015
- 2015-11-10 CN CN201510765933.4A patent/CN105238939A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101306804A (en) * | 2007-05-16 | 2008-11-19 | 洛阳栾川钼业集团冶炼有限责任公司 | Process for preparing acid from flue gas by calcining molybdenum concentrate in rotary kiln |
| CN201254529Y (en) * | 2008-09-01 | 2009-06-10 | 黄新春 | Cement clinker calcination system |
| CN103288133A (en) * | 2012-02-27 | 2013-09-11 | 兰州理工大学 | Method for preparing arsenic trioxide from black copper sludge |
| CN103290221A (en) * | 2012-02-28 | 2013-09-11 | 兰州理工大学 | Method for recovering copper, arsenium and antimony from black copper sludge |
| CN102875036A (en) * | 2012-10-24 | 2013-01-16 | 石家庄市新华工业炉有限公司 | Heat storage type lime rotary kiln |
| CN103710532A (en) * | 2014-01-22 | 2014-04-09 | 安徽工业大学 | Method for performing microwave arsenic removal on high-arsenic iron ore |
| CN104108891A (en) * | 2014-07-14 | 2014-10-22 | 中国中材国际工程股份有限公司 | White cement clinker bleaching device and process |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111394570A (en) * | 2020-04-24 | 2020-07-10 | 湖南金马冶金技术开发有限公司 | External heating rotary furnace dearsenification device |
| CN113549755A (en) * | 2020-11-12 | 2021-10-26 | 广东天源环境科技有限公司 | Equipment and method for dearsenifying high-arsenic metal mineral powder with preheated smoke flowing at 360 degrees |
| CN114410969A (en) * | 2021-12-30 | 2022-04-29 | 济源豫光有色冶金设计研究院有限公司 | Method for recycling copper and arsenic from black copper mud step by step |
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