CN113234934B - Zinc-containing smoke leaching treatment method and device for steel plant - Google Patents

Zinc-containing smoke leaching treatment method and device for steel plant Download PDF

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Publication number
CN113234934B
CN113234934B CN202110552497.8A CN202110552497A CN113234934B CN 113234934 B CN113234934 B CN 113234934B CN 202110552497 A CN202110552497 A CN 202110552497A CN 113234934 B CN113234934 B CN 113234934B
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leaching
zinc
tank
stirring
stirring tank
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CN113234934A (en
Inventor
张晋霞
牛福生
于晓东
陈稳
安宇坤
何胜滔
杨超
董佳静
陈雨盈
朱笑磊
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North China University of Science and Technology
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North China 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
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/20—Obtaining zinc otherwise than by distilling
    • C22B19/24—Obtaining zinc otherwise than by distilling with leaching with alkaline solutions, e.g. ammonia
    • 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
    • C22B7/008—Wet processes by an alkaline or ammoniacal leaching
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
    • C25C1/16—Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
    • 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 invention discloses a zinc-containing smoke leaching treatment method and a device thereof in a steel plant, belonging to the technical field of metal recovery and comprising the following steps: the stirring tank, the material storage mechanism, the stirring mechanism, the control mechanism and the solid-liquid separation mechanism are arranged in the stirring tank; the storage mechanism is used for storing and conveying a choline chloride-urea leaching agent for leaching and is arranged at the top of the stirring tank; this scheme controls the flow that the material storage case discharged choline chloride-urea leaching agent at every turn through the solenoid valve in the first body, start through touch screen control electric plate, it heats the intensification to last to heat the agitator tank inside, thereby the treatment effeciency of leaching has been improved, the leachate of output after leaching and the leaching sediment can be intercepted by first filter screen and second filter screen, the leachate carries out subsequent electrolysis operation in the water tank, the leaching sediment is dried the operation through fan and electrothermal tube in the filter screen, make this scheme realize solid-liquid separation, the processing procedure that zinc-containing smoke and dust leached has been reduced.

Description

Zinc-containing smoke leaching treatment method and device for steel plant
Technical Field
The invention relates to the technical field of metal recovery, in particular to a zinc-containing smoke leaching treatment method and a zinc-containing smoke leaching treatment device for a steel plant.
Background
Zinc leaching is a process of selectively dissolving zinc in a zinc-containing material in an aqueous solution by using a leaching agent, and is an important component of a zinc hydrometallurgy process. According to the zinc-containing materials leached out, the zinc roasting sand leaching, zinc sulfide concentrate or pressure leaching, zinc oxide material leaching and the like are divided. The commonly used leaching agent is dilute sulphuric acid, and the obtained zinc sulfate leachate is subjected to impurity removal and purification treatment and then is sent to zinc electrowinning to produce metal zinc.
However, the prior art has certain problems:
1. the existing zinc-containing smoke dust leaching treatment method for the steel plant is usually carried out by a wet method, sulfuric acid is added in the treatment process for stirring and mixing and then continuously leaching, the sulfuric acid ratio and the temperature cannot be accurately controlled in the leaching process, so that the efficiency of the leaching process is low, the corrosivity of the sulfuric acid is high, the requirement on the type selection of equipment is high, and the purchase cost of the equipment is high;
2. in the prior art, leachate produced after zinc-containing smoke is leached is conveyed to a leachate electrolytic cell for electrolytic deposition, and leached residues filtered out by the leachate electrolytic cell need to be conveyed to a drying furnace for drying operation, so that the treatment process is increased, and the treatment cost is increased.
Disclosure of Invention
The invention aims to provide a zinc-containing smoke leaching treatment method and a zinc-containing smoke leaching treatment device for a steel plant, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a zinc-containing smoke dust leaching treatment device for a steel plant comprises: the stirring tank, the material storage mechanism, the stirring mechanism, the control mechanism and the solid-liquid separation mechanism are arranged in the stirring tank;
the storage mechanism is used for storing and conveying a choline chloride-urea leaching agent for leaching and is arranged at the top of the stirring tank;
the stirring mechanism is used for mixing and stirring the leached materials and is arranged in the stirring tank;
the solid-liquid separation mechanism is used for solid-liquid separation after leaching and is arranged on one side of the stirring tank;
the control mechanism is used for displaying and controlling electrical equipment in the device, and the control mechanism is installed on the solid-liquid separation mechanism.
Preferably, the storage mechanism comprises a first pipe body and a storage box, one end of the first pipe body penetrates through the bottom of the storage box, the other end of the first pipe body penetrates through the top of the stirring tank, and a liquid level meter is installed on the storage box.
Preferably, rabbling mechanism includes the motor, the body of rod and stirring leaf, the motor install in the top of agitator tank, body of rod fixed connection in the axis of rotation of motor, the one end of the body of rod runs through the top of agitator tank, two sleeves have been cup jointed to the symmetry on the body of rod, stirring leaf fixed connection in telescopic lateral wall, the electric plate is installed to the inner wall of agitator tank, temperature sensor is installed to the interior bottom of agitator tank.
Preferably, solid-liquid separation mechanism includes discharging pipe and box, the one end of discharging pipe run through in the bottom of agitator tank, the other end of discharging pipe runs through one side of box, the interior bottom of box is provided with the water tank, the inner wall of box is the first filter screen of fixedly connected with and second filter screen respectively, four fans are installed to the inner wall symmetry of box, and four electrothermal tubes are installed to the inside symmetry of box, the one side welding of box has the backup pad, the water pump is installed at the top of backup pad, the water inlet intercommunication of water pump has the second body, the one end of second body runs through one side of box, just the one end of second body is located the inside of water tank.
Preferably, the control mechanism includes a casing, two solenoid valves and a single chip microcomputer, the casing is installed in one side of the box, the single chip microcomputer is installed in the box, one the solenoid valve is installed on the first pipe body, another the solenoid valve is installed on the discharging pipe, a touch screen is installed on one side of the casing, the signal input part of the solenoid valve is connected with the signal output part of the single chip microcomputer, the motor and the electric control end of the water pump are connected with the electric control output part of the single chip microcomputer through wires, the signal output part of the touch screen is connected with the signal input part of the single chip microcomputer through wires, the temperature sensor and the signal output part of the liquid level meter are connected with the signal input part of the single chip microcomputer through wires, and the electric heating plate, the fan and the electric control end of the electric heating pipe are connected with the electric control output part of the single chip microcomputer through wires.
Preferably, a plurality of through grooves are formed in the stirring blade.
Preferably, one side of the box body is embedded with an observation window.
Preferably, the inlet pipe has been run through at the top of agitator tank, the lateral wall cladding of agitator tank has thermal-insulated cotton.
In addition, the invention also provides a method of the zinc-containing smoke leaching treatment device in the steel plant, which comprises the following steps:
s1, zinc-containing smoke dust is put into a stirring tank through a feeding pipe, water is put into the stirring tank, a touch screen is used for controlling an electromagnetic valve in a first pipe body at the bottom of a storage box, choline chloride-urea leaching agent is filled in the storage box, and the choline chloride-urea leaching agent is conveyed into the stirring tank through the first pipe body after the electromagnetic valve is opened;
s2, a liquid level meter in the storage box can detect the metering of the choline chloride-urea leaching agent in the storage box and display the metering in a touch screen, the flow of the choline chloride-urea leaching agent discharged each time is controlled by a solenoid valve in a first pipe body, and the choline chloride-urea leaching agent is mixed in a stirring tank;
s3, starting a motor to drive a rod body to drive a sleeve and a stirring blade to rotate in the stirring tank, mixing the smoke dust with the blended choline chloride-urea leaching agent, controlling an electric heating plate to start through a touch screen, and continuously heating the interior of the stirring tank;
s4, after mixing, continuously leaching the smoke dust in a choline chloride-urea leaching agent, sensing the temperature through a temperature sensor, heating a leaching solution containing the smoke dust to 82-92 ℃ by using an electric heating plate, stirring the leaching solution to form leaching residues and a zinc-containing leaching solution, and discharging the leaching residues and the zinc-containing leaching solution into a box body by starting a discharge pipe;
s5, intercepting leaching residues after entering the interior of the box body through a first filter screen and a second filter screen, enabling the zinc-containing leaching solution to enter the interior of the water tank, connecting a cathode and an anode to carry out electrolysis operation on the zinc-containing leaching solution through the exterior to form a zinc-containing electrolytic solution, and discharging the zinc-containing electrolytic solution to the exterior through a water pump;
s6, drying the leaching residues intercepted in the first filter screen and the second filter screen by starting the fan and the electric heating tube, and taking out the leaching residues after drying to perform other metal extraction and recovery operations.
Preferably, in S6, the first filter screen is a 200-mesh filter screen, and the second filter screen is a 400-mesh filter screen.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the scheme, the flow of the choline chloride-urea leaching agent discharged from the material storage box each time is controlled through the electromagnetic valve in the first pipe body, the electric heating plate is controlled to be started through the touch screen, the inner part of the stirring tank is continuously heated and heated, and the temperature of the stirring tank is controlled to be 82-92 degrees, so that the leaching treatment efficiency is improved;
2. leachate and leaching slag which are produced after leaching are intercepted by the first filter screen and the second filter screen, the leachate carries out subsequent electrolysis operation in the water tank, and the leaching slag is dried in the filter screen through the fan and the electric heating tube, so that solid-liquid separation is realized, the treatment process of leaching the zinc-containing smoke dust is reduced, and the treatment efficiency is improved;
3. according to the scheme, the emission control and the temperature control of the choline chloride-urea leaching agent can be automatically controlled through the touch screen, and meanwhile, the starting and the closing of the motor and the water pump as well as the starting and the closing of the fan and the electric heating tube can be controlled, so that the operation of the scheme is more convenient and the automation degree is high;
4. the scheme adopts the choline chloride-urea to replace sulfuric acid as a leaching agent, and has low requirements on equipment type selection due to low corrosivity of the choline chloride-urea, so that the purchasing cost of the equipment can be effectively reduced, and the leaching treatment efficiency is higher.
Drawings
FIG. 1 is a schematic structural diagram of a zinc-containing fume leaching treatment method and a zinc-containing fume leaching treatment device in a steel plant, provided by the invention;
FIG. 2 is a schematic cross-sectional structure diagram of a box body in the zinc-containing smoke leaching treatment method and device thereof in the steel plant provided by the invention;
FIG. 3 is a schematic cross-sectional view of a storage bin of a zinc-containing flue dust leaching treatment method and a zinc-containing flue dust leaching treatment device of a steel plant according to the present invention;
FIG. 4 is a schematic structural diagram of stirring vanes in the zinc-containing smoke leaching treatment method and device thereof for a steel plant provided by the invention;
FIG. 5 is a schematic cross-sectional view of the shell of the zinc-containing smoke leaching treatment method and device thereof in the steel plant provided by the present invention;
FIG. 6 is a schematic cross-sectional view of the agitation tank of the zinc-containing fume leaching treatment method and apparatus thereof in a steel plant according to the present invention;
FIG. 7 is another schematic view structure diagram of the zinc-containing smoke leaching treatment method and the box body in the device thereof in the steel plant provided by the invention.
In the figure: 1. a liquid level meter; 2. a material storage box; 3. an electromagnetic valve; 4. a first pipe body; 5. a motor; 6. a stirring tank; 7. heat insulation cotton; 8. a discharge pipe; 9. a box body; 10. a housing; 11. a touch screen; 12. an electric heating tube; 13. a fan; 14. a first filter screen; 15. a second filter screen; 16. a water tank; 17. a second tube; 18. stirring blades; 19. a rod body; 20. a through groove; 21. a sleeve; 22. a single chip microcomputer; 23. a temperature sensor; 24. an electric hot plate; 25. an observation window; 26. a water pump; 27. a support plate; 28. and (4) feeding a pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example 1
A zinc-containing smoke leaching treatment device for a steel plant comprises: the stirring tank 6, a material storage mechanism, a stirring mechanism, a control mechanism and a solid-liquid separation mechanism;
the device comprises a storage mechanism, a stirring mechanism, a solid-liquid separation mechanism and a control mechanism, wherein the storage mechanism is used for storing and conveying a choline chloride-urea leaching agent for leaching, the stirring mechanism is used for mixing and stirring leached materials, the solid-liquid separation mechanism is used for solid-liquid separation after leaching, and the control mechanism is used for displaying and controlling electrical equipment in the device;
the material storage mechanism is arranged at the top of the stirring tank 6, the stirring mechanism is arranged inside the stirring tank 6, the solid-liquid separation mechanism is arranged on one side of the stirring tank 6, and the control mechanism is arranged on the solid-liquid separation mechanism.
As shown in fig. 1 and 4, the components of the stocker mechanism: storage mechanism includes first body 4 and storage case 2, and the one end of first body 4 runs through in the bottom of storage case 2, and the other end of first body 4 runs through in the top of agitator tank 6, installs level gauge 1 on the storage case 2.
The use principle of the storage mechanism is as follows: when the liquid storage mechanism is used, the electromagnetic valve 3 in the first pipe body 4 at the bottom of the liquid storage mechanism is controlled through the touch screen 11, after the electromagnetic valve 3 is opened, the choline chloride-urea leaching agent in the liquid storage mechanism 2 automatically discharges the choline chloride-urea leaching agent into the stirring tank 6, and the discharge flow of the choline chloride-urea leaching agent can be accurately controlled by using the electromagnetic valve 3.
As shown in fig. 1, 4 and 6, the stirring mechanism is composed of: rabbling mechanism includes motor 5, the body of rod 19 and stirring leaf 18, and motor 5 installs in the top of agitator tank 6, and 19 fixed connection in the axis of rotation of motor 5 on the body of rod, the top of agitator tank 6 is run through to the one end of the body of rod 19, and two sleeves 21 have been cup jointed to the symmetry on the body of rod 19, and stirring leaf 18 fixed connection is in sleeve 21's lateral wall, and electric plate 24 is installed to the inner wall of agitator tank 6, and temperature sensor 23 is installed to the interior bottom of agitator tank 6.
The stirring principle of the stirring mechanism is as follows: when the stirring mechanism is used, the rod body 19 is driven by the starting motor 5 of the touch screen 11 to drive the sleeve 21 and the stirring blades 18 to rotate in the stirring tank 6, the smoke dust and the prepared choline chloride-urea leaching agent are mixed, the electric heating plate 24 is controlled to be started through the touch screen 11, and the interior of the stirring tank 6 is continuously heated and warmed.
In order to improve the stirring efficiency, a plurality of through grooves 20 are formed on the stirring blade 18.
Can access to outside water source in for agitator tank 6, and the heat that gives off when agitator tank 6 uses can not cause the injury to the human body, the top of agitator tank 6 has run through there is inlet pipe 28, and the lateral wall cladding of agitator tank 6 has thermal-insulated cotton 7.
As shown in fig. 1, 2 and 7, the solid-liquid separation mechanism has the following composition: solid-liquid separation mechanism includes discharging pipe 8 and box 9, the one end of discharging pipe 8 runs through in the bottom of agitator tank 6, the other end of discharging pipe 8 runs through one side of box 9, the interior bottom of box 9 is provided with water tank 16, the inner wall of box 9 is the first filter screen 14 of fixedly connected with and second filter screen 15 respectively, four fans 13 are installed to the inner wall symmetry of box 9, four electrothermal tubes 12 are installed to the inside symmetry of box 9, one side welding of box 9 has backup pad 27, water pump 26 is installed at the top of backup pad 27, water pump 26's water inlet intercommunication has second body 17, one end of second body 17 runs through one side of box 9, and the one end of second body 17 is located the inside of water tank 16.
The separation principle of the solid-liquid separation mechanism is as follows: after the mixed materials are stirred by the stirring mechanism and fully leached in the stirring tank 6, the produced leachate and leached slag are intercepted by the first filter screen 14 and the second filter screen 15, the leachate carries out subsequent electrolysis operation in the water tank 16, and the leached slag is dried in the filter screen through the fan 13 and the electric heating tube 12, so that solid-liquid separation is realized.
An observation window 25 is embedded in one side of the box 9 in order to provide an observable window during drying.
As shown in fig. 1 to 7, the control mechanism is composed of: the control mechanism comprises a shell 10, two electromagnetic valves 3 and a single chip microcomputer 22, the shell 10 is installed on one side of a box body 9, the single chip microcomputer 22 is installed inside the box body 9, one electromagnetic valve 3 is installed on a first pipe body 4, the other electromagnetic valve 3 is installed on a discharging pipe 8, a touch screen 11 is installed on one side of the shell 10, a signal input end of the electromagnetic valve 3 is connected with a signal output end of the single chip microcomputer 22, electric control ends of a motor 5 and a water pump 26 are connected with an electric control output end of the single chip microcomputer 22 through wires, a signal output end of the touch screen 11 is connected with a signal input end of the single chip microcomputer 22 through wires, signal output ends of a temperature sensor 23 and a liquid level meter 1 are connected with a signal input end of the single chip microcomputer 22 through wires, and electric control ends of an electric heating plate 24, a fan 13 and an electric heating pipe 12 are connected with an electric control output end of the single chip microcomputer 22 through wires.
Control principle of the control mechanism: when the scheme is used, the emission control and the temperature control of the choline chloride-urea leaching agent can be automatically controlled through the touch screen 11, and meanwhile, the starting and the closing of the motor 5 and the water pump 26 and the starting and the closing of the fan 13 and the electric heating tube 12 can be controlled, so that the control of the electrical equipment in the scheme is realized.
According to the technical scheme, the working steps of the scheme are summarized and carded: the storage box 2 in the storage mechanism stores the choline chloride-urea leaching agent liquid for leaching, when in use, the electromagnetic valve 3 in the first tube 4 at the bottom of the material storage box 2 is controlled by the touch screen 11, and after the electromagnetic valve 3 is opened, the choline chloride-urea leaching agent in the storage box 2 automatically discharges the choline chloride-urea leaching agent into the stirring tank 6, the flow discharged by the choline chloride-urea leaching agent can be accurately controlled by using the electromagnetic valve 3, the choline chloride-urea leaching agent is controlled to discharge 220g to 260g of choline chloride-urea leaching agent per 1L of water, the motor 5 is started through the touch screen 11 to drive the rod body 19 to drive the sleeve 21 and the stirring blade 18 to rotate in the stirring tank 6, the smoke dust and the prepared choline chloride-urea leaching agent are mixed, the electric heating plate 24 is controlled to be started through the touch screen 11, the interior of the stirring tank 6 is continuously heated, wherein, the through groove 20 arranged in the stirring blade 18 can reduce the resistance of the stirring blade 18 during stirring, improve the stirring efficiency, the temperature is controlled between 82 degrees and 92 degrees, so that the leaching treatment efficiency is improved, the leaching solution and the leaching slag which are produced after leaching are intercepted by the first filter screen 14 and the second filter screen 15, the leaching solution is subjected to subsequent electrolysis operation in the water tank 16, the leaching slag is dried in the filter screens through the fan 13 and the electric heating pipe 12, thereby realizing solid-liquid separation, improving the treatment efficiency, realizing automatic control on the discharge control and the temperature control of the choline chloride-urea leaching agent through the touch screen 11, meanwhile, the starting and the closing of the motor 5 and the water pump 26, and the starting and the closing of the fan 13 and the electrothermal tube 12 can be controlled, so that the control of the electrical equipment in the scheme is realized.
Example 2
Based on example 1, what is different again is:
the zinc-containing smoke dust leaching treatment method applied to the steel plant in the embodiment 1 comprises the following steps:
s1, zinc-containing smoke dust is put into a stirring tank 6 through a feeding pipe 28, water is put into the stirring tank, a touch screen 11 is used for controlling an electromagnetic valve 3 in a first pipe body 4 at the bottom of a storage box 2, choline chloride-urea leaching agent is filled into the storage box 2, and after the electromagnetic valve 3 is opened, the choline chloride-urea leaching agent is conveyed into the stirring tank 6 through the first pipe body 4;
s2, a liquid level meter 1 in the storage tank 2 can detect the metering of the choline chloride-urea leaching agent in the storage tank 2 and display the metering in a touch screen 11, an electromagnetic valve 3 in a first pipe 4 is used for controlling the flow of the choline chloride-urea leaching agent discharged each time, and the choline chloride-urea leaching agent is mixed in a stirring tank 6;
s3, a starting motor 5 drives a rod body 19 to drive a sleeve 21 and a stirring blade 18 to rotate in the stirring tank 6, the smoke dust and the prepared choline chloride-urea leaching agent are mixed, an electric heating plate 24 is controlled to start through a touch screen 11, and the interior of the stirring tank 6 is continuously heated;
s4, after mixing, continuously leaching the smoke dust in a choline chloride-urea leaching agent, sensing the temperature through a temperature sensor 23, heating a leaching solution containing the smoke dust to 82 degrees by using an electric heating plate 24, forming leaching residues and a zinc-containing leaching solution in a stirring tank 6 after leaching, and discharging the leaching residues and the zinc-containing leaching solution into a tank body 9 by starting a discharge pipe 8;
s5, intercepting leaching residues after entering the box body 9 through the first filter screen 14 and the second filter screen 15, enabling the zinc-containing leaching solution to enter the water tank 16, connecting a cathode and an anode to carry out electrolysis operation on the zinc-containing leaching solution through the outside to form a zinc-containing electrolytic solution, and discharging the zinc-containing electrolytic solution to the outside through the water pump 26;
s6, drying the leaching residues intercepted in the first filter screen 14 and the second filter screen 15 by starting the fan 13 and the electric heating tube 12, and taking out the leaching residues after drying to perform other metal extraction and recovery operations.
Specifically, in S6, a 200-mesh filter screen is used as the first filter screen 14, and a 400-mesh filter screen is used as the second filter screen 15.
Example 3
Based on examples 1-2, there are differences:
a zinc-containing smoke dust leaching treatment method for a steel plant comprises the following steps:
s1, zinc-containing smoke dust is put into a stirring tank 6 through a feeding pipe 28, water is put into the stirring tank, a touch screen 11 is used for controlling an electromagnetic valve 3 in a first pipe body 4 at the bottom of a storage box 2, choline chloride-urea leaching agent is filled into the storage box 2, and after the electromagnetic valve 3 is opened, the choline chloride-urea leaching agent is conveyed into the stirring tank 6 through the first pipe body 4;
s2, the liquid level meter 1 in the storage tank 2 can detect the metering of the choline chloride-urea leaching agent in the storage tank 2 and display the metering in the touch screen 11, the electromagnetic valve 3 in the first pipe body 4 is used for controlling the flow of the choline chloride-urea leaching agent discharged each time, and the choline chloride-urea leaching agent is mixed in the stirring tank 6;
s3, a starting motor 5 drives a rod body 19 to drive a sleeve 21 and a stirring blade 18 to rotate in the stirring tank 6, the smoke dust and the prepared choline chloride-urea leaching agent are mixed, an electric heating plate 24 is controlled to start through a touch screen 11, and the interior of the stirring tank 6 is continuously heated;
s4, after mixing, continuously leaching the smoke dust in a choline chloride-urea leaching agent, sensing the temperature through a temperature sensor 23, and utilizing an electric heating plate 24 to carry out leaching on the leaching solution containing the smoke dustHeating to 92 °Leaching slag and zinc-containing leachate are formed in the stirred tank 6 after leaching, and the leaching slag and the zinc-containing leachate are discharged into the tank body 9 by starting the discharge pipe 8;
s5, after entering the box body 9, the leaching residues are intercepted through a first filter screen 14 and a second filter screen 15, the zinc-containing leaching solution enters the water tank 16, a cathode and an anode are communicated with the outside to carry out electrolysis operation on the zinc-containing leaching solution, so that a zinc-containing electrolytic solution is formed, and the zinc-containing electrolytic solution is discharged to the outside through a water pump 26;
s6, drying the leaching residues intercepted in the first filter screen 14 and the second filter screen 15 by starting the fan 13 and the electric heating tube 12, and taking out the dried leaching residues to perform other metal extraction and recovery operations.
Specifically, in S6, a 200-mesh filter screen is used as the first filter screen 14, and a 400-mesh filter screen is used as the second filter screen 15.
Example 4
Based on examples 1 to 3, there are again differences:
a zinc-containing smoke dust leaching treatment method for a steel plant comprises the following steps:
s1, zinc-containing smoke dust is put into a stirring tank 6 through a feeding pipe 28, water is put into the stirring tank, a touch screen 11 is used for controlling an electromagnetic valve 3 in a first pipe body 4 at the bottom of a storage box 2, choline chloride-urea leaching agent is filled into the storage box 2, and after the electromagnetic valve 3 is opened, the choline chloride-urea leaching agent is conveyed into the stirring tank 6 through the first pipe body 4;
s2, the liquid level meter 1 in the storage tank 2 can detect the metering of the choline chloride-urea leaching agent in the storage tank 2 and display the metering in the touch screen 11, the electromagnetic valve 3 in the first pipe body 4 is used for controlling the flow of the choline chloride-urea leaching agent discharged each time, and the choline chloride-urea leaching agent is mixed in the stirring tank 6;
s3, a starting motor 5 drives a rod body 19 to drive a sleeve 21 and a stirring blade 18 to rotate in the stirring tank 6, the smoke dust and the prepared choline chloride-urea leaching agent are mixed, an electric heating plate 24 is controlled to start through a touch screen 11, and the interior of the stirring tank 6 is continuously heated;
s4, continuously leaching the smoke dust in a choline chloride-urea leaching agent after mixing, sensing the temperature through a temperature sensor 23, heating a leaching solution containing the smoke dust to 87 degrees through an electric heating plate 24, forming leaching residues and a zinc-containing leaching solution in an agitating tank 6 after leaching, and discharging the leaching residues and the zinc-containing leaching solution into a tank body 9 by starting a discharge pipe 8;
s5, intercepting leaching residues after entering the box body 9 through the first filter screen 14 and the second filter screen 15, enabling the zinc-containing leaching solution to enter the water tank 16, connecting a cathode and an anode to carry out electrolysis operation on the zinc-containing leaching solution through the outside to form a zinc-containing electrolytic solution, and discharging the zinc-containing electrolytic solution to the outside through the water pump 26;
s6, drying the leaching residues intercepted in the first filter screen 14 and the second filter screen 15 by starting the fan 13 and the electric heating tube 12, and taking out the leaching residues after drying to perform other metal extraction and recovery operations.
Specifically, in S6, a 200-mesh filter screen is used as the first filter screen 14, and a 400-mesh filter screen is used as the second filter screen 15.
To sum up: according to the scheme, the flow of the choline chloride-urea leaching agent discharged by the material storage box 2 every time is controlled by the electromagnetic valve 3 in the first pipe body 4, 220-260 g of the choline chloride-urea leaching agent is controlled to be put in every 1L of water, the electric heating plate 24 is controlled to be started through the touch screen 11, the interior of the stirring tank 6 is continuously heated, the temperature is controlled to be 82-92 degrees, and therefore the leaching treatment efficiency is improved;
leachate and leaching slag which are produced after leaching are intercepted by the first filter screen 14 and the second filter screen 15, the leachate carries out subsequent electrolysis operation in the water tank 16, and the leaching slag is dried in the filter screen through the fan 13 and the electric heating tube 12, so that solid-liquid separation is realized, the treatment flow of leaching the zinc-containing smoke dust is reduced, and the treatment efficiency is improved;
according to the scheme, the emission control and the temperature control of the choline chloride-urea leaching agent can be automatically controlled through the touch screen 11, and meanwhile, the motor 5 and the water pump 26 can be controlled to be started and closed, and the fan 13 and the electric heating tube 12 can be controlled to be started and closed, so that the operation of the scheme is more convenient and the automation degree is high.
The scheme adopts the choline chloride-urea to replace sulfuric acid as a leaching agent, and has low requirements on the type selection of equipment due to low corrosivity of the choline chloride-urea, so that the purchasing cost of the equipment can be effectively reduced, and the leaching treatment efficiency is higher.
The parts not involved in the present invention are the same as or can be implemented by the prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A zinc-containing smoke leaching treatment device for a steel plant is characterized by comprising: the device comprises a stirring tank (6), a material storage mechanism, a stirring mechanism, a control mechanism and a solid-liquid separation mechanism;
the storage mechanism is used for storing and conveying a choline chloride-urea leaching agent for leaching, and is arranged at the top of the stirring tank (6);
the stirring mechanism is used for mixing and stirring the leached materials and is arranged in the stirring tank (6);
the solid-liquid separation mechanism is used for solid-liquid separation after leaching and is arranged on one side of the stirring tank (6);
the control mechanism is used for displaying and controlling electrical equipment in the device and is arranged on the solid-liquid separation mechanism;
the material storage mechanism comprises a first pipe body (4) and a material storage box (2), one end of the first pipe body (4) penetrates through the bottom of the material storage box (2), the other end of the first pipe body (4) penetrates through the top of the stirring tank (6), and a liquid level meter (1) is mounted on the material storage box (2);
the stirring mechanism comprises a motor (5), a rod body (19) and a stirring blade (18), the motor (5) is installed at the top of the stirring tank (6), the rod body (19) is fixedly connected to a rotating shaft of the motor (5), one end of the rod body (19) penetrates through the top of the stirring tank (6), two sleeves (21) are symmetrically sleeved on the rod body (19), the stirring blade (18) is fixedly connected to the outer side wall of each sleeve (21), an electric heating plate (24) is installed on the inner wall of the stirring tank (6), and a temperature sensor (23) is installed at the inner bottom of the stirring tank (6);
the solid-liquid separation mechanism comprises a discharge pipe (8) and a box body (9), one end of the discharge pipe (8) penetrates through the bottom of the stirring tank (6), the other end of the discharge pipe (8) penetrates through one side of the box body (9), a water tank (16) is arranged at the inner bottom of the box body (9), the inner wall of the box body (9) is fixedly connected with a first filter screen (14) and a second filter screen (15) respectively, four fans (13) are symmetrically arranged on the inner wall of the box body (9), four electric heating tubes (12) are symmetrically arranged inside the box body (9), a supporting plate (27) is welded on one side of the box body (9), a water pump (26) is arranged at the top of the supporting plate (27), a water inlet of the water pump (26) is communicated with a second pipe body (17), one end of the second pipe body (17) penetrates through one side of the box body (9), and one end of the second pipe body (17) is located inside the water tank (16);
the control mechanism comprises a shell (10), two electromagnetic valves (3) and a single chip microcomputer (22), wherein the shell (10) is installed on one side of the box body (9), the single chip microcomputer (22) is installed inside the box body (9), one electromagnetic valve (3) is installed on the first pipe body (4), the other electromagnetic valve (3) is installed on the discharge pipe (8), a touch screen (11) is installed on one side of the shell (10), a signal input end of the electromagnetic valve (3) is connected with a signal output end of the single chip microcomputer (22), electric control ends of the motor (5) and the water pump (26) are connected with an electric control output end of the single chip microcomputer (22) through a wire, a signal output end of the touch screen (11) is connected with a signal input end of the single chip microcomputer (22) through a wire, signal output ends of the temperature sensor (23) and the liquid level meter (1) are connected with a signal input end of the single chip microcomputer (22) through a wire, and electric heating plates (24), the fan (13) and the single chip microcomputer end of the electric heating pipe (12) are connected with an electric control output end of the single chip microcomputer (22) through a wire;
the method applied to the zinc-containing smoke leaching treatment device of the steel plant comprises the following steps:
s1, zinc-containing smoke dust is put into a stirring tank (6) through a feeding pipe (28), water is put into the stirring tank, a touch screen (11) is used for controlling an electromagnetic valve (3) in a first pipe body (4) at the bottom of a storage box (2), a choline chloride-urea leaching agent is filled in the storage box (2), and the choline chloride-urea leaching agent is conveyed into the stirring tank (6) through the first pipe body (4) after the electromagnetic valve (3) is opened;
s2, a liquid level meter (1) in the storage tank (2) can detect the metering of the choline chloride-urea leaching agent in the storage tank (2) and display the metering in a touch screen (11), the electromagnetic valve (3) in the first pipe body (4) is used for controlling the flow of the choline chloride-urea leaching agent discharged each time, and the choline chloride-urea leaching agent is mixed in a stirring tank (6);
s3, a starting motor (5) drives a rod body (19) to drive a sleeve (21) and a stirring blade (18) to rotate in a stirring tank (6), the smoke dust and the prepared choline chloride-urea leaching agent are mixed, an electric heating plate (24) is controlled to start through a touch screen (11), and the interior of the stirring tank (6) is continuously heated and warmed;
s4, after mixing, continuously leaching the smoke dust in a choline chloride-urea leaching agent, sensing the temperature through a temperature sensor (23), heating a leaching solution containing the smoke dust to 82-92 ℃ by using an electric heating plate (24), forming leaching residues and a zinc-containing leaching solution in a stirring tank (6) after leaching, and discharging the leaching residues and the zinc-containing leaching solution into a tank body (9) by starting a discharge pipe (8);
s5, after entering the box body (9), the leaching residues are intercepted through a first filter screen (14) and a second filter screen (15), the zinc-containing leaching solution enters a water tank (16), a cathode and an anode are communicated with the outside to carry out electrolysis operation on the zinc-containing leaching solution, so that a zinc-containing electrolytic solution is formed, and the zinc-containing electrolytic solution is discharged to the outside through a water pump (26);
s6, drying the leaching residues intercepted in the first filter screen (14) and the second filter screen (15) by starting the fan (13) and the electric heating tube (12), and taking out the leaching residues after drying to perform other metal extraction and recovery operations.
2. The zinc-containing flue dust leaching treatment device of the steel plant according to claim 1, characterized in that: the stirring blade (18) is provided with a plurality of through grooves (20).
3. The zinc-containing flue dust leaching treatment device of the steel plant according to claim 1, characterized in that: and an observation window (25) is embedded in one side of the box body (9).
4. The zinc-containing flue dust leaching treatment device of the steel plant according to claim 1, characterized in that: the top of agitator tank (6) is run through there is inlet pipe (28), the lateral wall cladding of agitator tank (6) has thermal-insulated cotton (7).
5. A method of a zinc containing fume leaching treatment plant of a steel plant as claimed in claim 1, characterized in that: in S6, a 200-mesh filter screen is adopted as the first filter screen (14), and a 400-mesh filter screen is adopted as the second filter screen (15).
CN202110552497.8A 2021-05-20 2021-05-20 Zinc-containing smoke leaching treatment method and device for steel plant Active CN113234934B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2415732A1 (en) * 2000-07-14 2002-01-24 Noranda Inc. Production of zinc oxide from acid soluble ore using precipitation method
CN108546829A (en) * 2018-04-09 2018-09-18 苏州大学 A method of the processing of the synthetical recovery of metallurgical dust sludge containing zinc
CN109055741A (en) * 2018-09-07 2018-12-21 安徽金贺财建筑工程有限公司 One kind being used for hydrometallurgical equipment for separating liquid from solid
CN210394478U (en) * 2019-06-10 2020-04-24 桂阳县皓钰新材料有限公司 Zinc-containing smoke leaching reaction tank

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2415732A1 (en) * 2000-07-14 2002-01-24 Noranda Inc. Production of zinc oxide from acid soluble ore using precipitation method
CN108546829A (en) * 2018-04-09 2018-09-18 苏州大学 A method of the processing of the synthetical recovery of metallurgical dust sludge containing zinc
CN109055741A (en) * 2018-09-07 2018-12-21 安徽金贺财建筑工程有限公司 One kind being used for hydrometallurgical equipment for separating liquid from solid
CN210394478U (en) * 2019-06-10 2020-04-24 桂阳县皓钰新材料有限公司 Zinc-containing smoke leaching reaction tank

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