CN113637852A - Method for recovering iron and zinc from dust and low-carbon sludge collected from steel plant - Google Patents

Method for recovering iron and zinc from dust and low-carbon sludge collected from steel plant Download PDF

Info

Publication number
CN113637852A
CN113637852A CN202110926538.5A CN202110926538A CN113637852A CN 113637852 A CN113637852 A CN 113637852A CN 202110926538 A CN202110926538 A CN 202110926538A CN 113637852 A CN113637852 A CN 113637852A
Authority
CN
China
Prior art keywords
iron
zinc
dust
roasting
materials
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110926538.5A
Other languages
Chinese (zh)
Inventor
张钦
王先东
王艺轩
张宁
张逸璁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN202110926538.5A priority Critical patent/CN113637852A/en
Publication of CN113637852A publication Critical patent/CN113637852A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00Working 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
    • C22B7/02Working-up flue dust
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B13/00Making spongy iron or liquid steel, by direct processes
    • C21B13/0066Preliminary conditioning of the solid carbonaceous reductant
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00Preliminary treatment of ores or scrap
    • C22B1/02Roasting processes
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00Preliminary treatment of ores or scrap
    • C22B1/14Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24Binding; Briquetting ; Granulating
    • C22B1/2406Binding; Briquetting ; Granulating pelletizing
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B19/00Obtaining zinc or zinc oxide
    • C22B19/30Obtaining zinc or zinc oxide from metallic residues or scraps
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B19/00Obtaining zinc or zinc oxide
    • C22B19/34Obtaining zinc oxide
    • C22B19/38Obtaining zinc oxide in rotary furnaces
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00Working 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
    • C22B7/001Dry processes
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

The invention relates to the technical field of environment-friendly recycling of solid wastes of iron and steel plants, in particular to a method for recycling iron and zinc from dust and low-carbon sludge of the iron and steel plants. According to the invention, through optimizing the material proportion, the iron is enriched and dezincification is carried out by roasting in the rotary kiln, the roasting escape rate of zinc in the material can reach more than 95%, the iron content in the enriched iron slag is more than 62%, and the zinc content is lower than 0.15%; and cooling the roasting tail gas of the rotary kiln to remove dust and collect zinc, wherein the temperature of the roasting tail gas of the rotary kiln is 600-800 ℃, the roasting tail gas is cooled to 200-300 ℃ through heat exchange to collect dust, the obtained dust collection powder is zinc oxide powder with the content of 50-60%, and the tail gas is discharged after washing and desulfurization to reach the standard. Aiming at the technical defects of the prior pyrometallurgical treatment of solid wastes in steel plants, the invention provides a comprehensive utilization method which is simple in operation, strong in applicability and capable of effectively recovering iron and zinc and is obtained by combining technological parameter adjustment and equipment adaptation conditions.

Description

Method for recovering iron and zinc from dust and low-carbon sludge collected from steel plant
Technical Field
The invention relates to the technical field of environment-friendly recycling of solid wastes of iron and steel plants, in particular to a method for recycling iron and zinc from dust and low-carbon sludge of the iron and steel plants.
Background
With the development of the steel industry in China, the resource recycling of iron and zinc in a large amount of dust and low-carbon sludge (the dust and the low-carbon sludge are derived from the dust collection of converter steelmaking tail gas and the dust collection of blast furnace ironmaking tail gas) in steel plants is a requirement for environmental protection and improvement of resource utilization efficiency. The domestic disposal methods for the dust and the low-carbon sludge in the steel mill include a rotary hearth furnace baking and winding process, a belt type sintering process and a rotary kiln baking process.
The existing rotary hearth furnace technology directly lays a material layer with the thickness of 30-50mm on a refractory material, directly sprays the material on a pellet material layer by flame to heat the material, has lower heat transfer efficiency, and requires high equipment investment under operation control conditions. The belt sintering process is to heat the material with the height of 30-350mm in the material layer on the belt sintering roasting machine by using blast furnace gas, and integrates drying, reduction and roasting of the material, but has the advantages of large investment, small relative processing capacity and high comprehensive cost. The rotary kiln process is characterized in that powder or granulated powder is roasted by coal gas or pulverized coal spraying, most of the powder is roasted, the investment is low, the operation is simple, the operation cost is low, and the like, but the recovered zinc oxide powder is low in content, and the biggest defect is that the equipment cannot normally operate due to the fact that the material is easy to form a ring in the production process. Therefore, the existing methods for treating a large amount of dust and low-carbon sludge in steel plants have some technical defects, and further improvement is still needed.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a method for recovering iron and zinc from dust and low-carbon sludge in a steel plant, which comprises the following steps:
(1) mixing materials: adding dust and low-carbon sludge of a steel plant into a mixer according to a certain proportion, adding a proper amount of reduced carbon powder, adding 1-2% of adhesive according to the total amount of the materials, starting the mixer to uniformly mix the materials, and ensuring that the water content of the materials is 5-10% in the mixing process;
(2) material ball pressing, drying and dewatering: feeding the mixed materials into high-pressure ball-making equipment, making the diameter of the pressed ball be 30-50mm, drying the finished ball on a belt-type dryer until the water content is less than 1% and the compression strength of the dried ball is 70-100kN/cm2
(3) Roasting the material ball in a rotary kiln to enrich iron and remove zinc: roasting the materials in a rotary kiln, controlling the roasting temperature of the materials to be 1000-1300 ℃, and roasting the materials for 1-2 hours, wherein the roasting escape rate of zinc in the materials can reach more than 95 percent by optimizing the material proportion, the iron content in the enriched iron slag is more than 62 percent, and the zinc content is less than 0.15 percent;
(4) cooling, dedusting and recovering zinc from roasting tail gas of a rotary kiln: the roasting tail gas temperature of the rotary kiln is 600-800 ℃, the obtained dust collecting powder is 50-60% of zinc oxide powder, the dust collecting tail gas is cooled to 200-300 ℃ through heat exchange, and the dust collecting tail gas is discharged after being washed and desulfurized to reach the standard.
Preferably, in the step (1), the ratio of the dust collection ash to the low carbon sludge to the reduced carbon powder is (4-6): (2-4): (0.5-1.5), and the ratio can ensure that enough reduced carbon can be obtained so that iron can be reduced and zinc can be removed by escaping.
Preferably, the reduced carbon powder in the step (1) is coke powder. The fixed carbon of the coke powder has high ash content and is suitable for matching with the components in the application.
Preferably, the binder in the step (1) is a high molecular polymer-based binder.
Preferably, the adhesive is a special high molecular polymer adhesive produced by Beijing Kogyu Co., Ltd, and has the performance of high temperature resistance, no toxicity, no harm and no residue.
Preferably, in the step (1), a proper amount of spray water is added according to the water content of the material in the mixing process, so as to ensure that the water content of the material is 5-10%.
Preferably, in the step (2), the rotary kiln roasting is to heat the inside of the rotary kiln by providing heat energy through gas or coal powder.
Compared with the prior art, the invention has the technical effects that:
(1) according to the invention, through optimizing the material proportion, the iron is enriched and the zinc is removed by roasting in the rotary kiln, the roasting escape rate of zinc in the material can reach more than 95%, the iron content in the enriched iron slag is more than 62%, and the zinc content is less than 0.15%.
(2) According to the invention, the zinc is collected by cooling and dedusting the roasting tail gas of the rotary kiln, the temperature of the roasting tail gas of the rotary kiln is 600-.
(3) Aiming at the technical defects of the prior pyrometallurgical treatment of solid wastes in steel plants, the invention provides a comprehensive utilization method which is simple in operation, strong in applicability and capable of effectively recovering iron and zinc by adopting technical parameter adjustment and equipment adaptation conditions, and has the most obvious effect of avoiding the ring formation of a rotary kiln.
Drawings
FIG. 1 is a schematic flow diagram of the present invention.
Detailed Description
The technical solution of the present invention is further defined below with reference to the specific embodiments, but the scope of the claims is not limited to the description.
The dust and low carbon sludge from a certain steel mill are used as raw materials
Dust collecting component
Item Zn CaO MgO Fe Al2O3 Pb K2O Na2O SiO2 C
Dust collection ash% 4.32 8.86 0.85 53.01 0.41 0.16 0.05 0.98 1.69 1.18
Low carbon content mud
Item Zn CaO MgO Fe Al2O3 Pb SiO2 C
Low carbon mud% 2.62 3.85 0.94 34.46 2.83 0.32 6.30 23.49
Example 1
A method for recovering iron and zinc from dust and low-carbon sludge of a steel plant comprises the following steps:
(1) mixing materials: adding the dust ash, the low-carbon sludge and the coke powder of the steel plant into a mixer according to the proportion of 5:3:0.5, adding 2% of high-molecular polymer adhesive according to the total amount of the materials, starting the mixer to uniformly mix the materials, and adding a proper amount of spray water according to the water content of the materials in the mixing process to ensure that the water content of the materials is 8.5%;
(2) material ball pressing, drying and dewatering: the mixed materials are sent into high-pressure ball-making equipment,the diameter of the pressed ball is 40mm, the finished ball is dried on a belt dryer until the moisture content is less than 1 percent, and the compressive strength of the dry ball is 70-100kN/cm2
(3) Roasting the material ball in a rotary kiln to enrich iron and remove zinc: heating the rotary kiln to 1000 ℃ by providing heat energy through burning gas in the rotary kiln, starting to put in dried pellets to roast materials, controlling the roasting temperature of the materials at 1100 ℃, controlling the air supply quantity to ensure that the kiln is in a reduction state, roasting the materials in the kiln for 1.5 hours, cooling (recovering heat) the iron-rich slag discharged from the kiln, then sending the cooled iron-rich slag into a storage yard, and actually measuring the iron content of the iron-rich slag to be 62.50% and the zinc content to be 0.14%;
(4) cooling, dedusting and recovering zinc from roasting tail gas of a rotary kiln: roasting tail gas in a rotary kiln at the temperature of 600 ℃, carrying out heat exchange, cooling to 200 ℃, collecting dust, wherein the obtained dust collecting powder is zinc oxide powder with the content of 54%, and the tail gas is discharged after washing and desulfurization to reach the standard.
Example 2
A method for recovering iron and zinc from dust and low-carbon sludge of a steel plant comprises the following steps:
(1) mixing materials: adding the dust ash, the low-carbon sludge and the coke powder of the steel plant into a mixer according to the ratio of 6:2:1, adding 2% of high-molecular polymer adhesive according to the total amount of the materials, starting the mixer to uniformly mix the materials, and assisting a proper amount of spray water according to the water content of the materials in the mixing process to ensure that the water content of the materials is 8.5%;
(2) material ball pressing, drying and dewatering: feeding the mixed materials into a high-pressure ball-making device, wherein the diameter of the pressed ball is 40mm, the finished ball is dried on a belt dryer until the moisture content is less than 1%, and the compressive strength of the dried ball is 70-100kN/cm2
(3) Roasting the material ball in a rotary kiln to enrich iron and remove zinc: heating the rotary kiln to 1000 ℃ by supplying heat energy through burning gas in the rotary kiln, starting to put in dried pellets to roast materials, controlling the roasting temperature of the materials at 1100 ℃, controlling the air supply quantity to ensure that the kiln is in a reduction state, roasting the materials in the kiln for 1.5 hours, cooling (recovering heat) the iron-rich slag discharged from the kiln, and then sending the cooled iron-rich slag into a storage yard, wherein the iron content of the iron-rich slag is 64.10 percent and the zinc content is 0.10 percent;
(4) cooling, dedusting and recovering zinc from roasting tail gas of a rotary kiln: roasting tail gas in a rotary kiln at the temperature of 600 ℃, carrying out heat exchange, cooling to 200 ℃, collecting dust, wherein the obtained dust collecting powder is zinc oxide powder with the content of 56%, and discharging the tail gas after washing and desulfurization to reach the standard.
Example 3
A method for recovering iron and zinc from dust and low-carbon sludge of a steel plant comprises the following steps:
(1) mixing materials: adding the dust ash, the low-carbon sludge and the coke powder of the steel plant into a mixer according to the proportion of 6:4:0.5, adding 1.5 percent of high-molecular polymer adhesive according to the total amount of the materials, starting the mixer to uniformly mix the materials, and adding a proper amount of spray water according to the water content of the materials in the mixing process to ensure that the water content of the materials is 8.5 percent;
(2) material ball pressing, drying and dewatering: feeding the mixed materials into high-pressure ball-making equipment, making the ball diameter be 30mm, drying the finished ball on a belt-type dryer until the water content is less than 1% and the compression strength of the dried ball is 70-100kN/cm2
(3) Roasting the material ball in a rotary kiln to enrich iron and remove zinc: heating the rotary kiln to 1000 ℃ by supplying heat energy through burning gas in the rotary kiln, starting to put in dried pellets to roast materials, controlling the roasting temperature of the materials to 1300 ℃, controlling the air supply quantity to ensure that the kiln is in a reduction state, roasting the materials in the kiln for 2 hours, cooling (recovering heat) the iron-rich slag discharged from the kiln, and then sending the cooled iron-rich slag into a storage yard, wherein the iron content of the iron-rich slag is measured to be 62.1 percent and the zinc content is measured to be 0.15 percent;
(4) cooling, dedusting and recovering zinc from roasting tail gas of a rotary kiln: roasting tail gas in a rotary kiln at the temperature of 600 ℃, carrying out heat exchange, cooling to 200 ℃, collecting dust, wherein the obtained dust collecting powder is zinc oxide powder with the content of 53%, and the tail gas is discharged after washing and desulfurization to reach the standard.
Example 4
A method for recovering iron and zinc from dust and low-carbon sludge of a steel plant comprises the following steps:
(1) mixing materials: adding the dust ash, the low-carbon sludge and the coke powder of the steel plant into a mixer according to the proportion of 6:2:1.5, adding 2% of high-molecular polymer adhesive according to the total amount of the materials, starting the mixer to uniformly mix the materials, and adding a proper amount of spray water according to the water content of the materials in the mixing process to ensure that the water content of the materials is 5%;
(2) material ball pressing, drying and dewatering: feeding the mixed materials into a high-pressure ball-making device, wherein the diameter of the pressed ball is 50mm, the finished ball is dried on a belt dryer until the moisture content is less than 1%, and the compressive strength of the dried ball is 70-100kN/cm2
(3) Roasting the material ball in a rotary kiln to enrich iron and remove zinc: heating the rotary kiln to 1000 ℃ by supplying heat energy through burning gas in the rotary kiln, starting to put in dried pellets to roast materials, controlling the roasting temperature of the materials to 1200 ℃, controlling the air supply quantity to ensure that the kiln is in a reduction state, roasting the materials in the kiln for 1.5 hours, cooling (recovering heat) the iron-rich slag discharged from the kiln, and then sending the cooled iron-rich slag into a storage yard, wherein the iron content of the iron-rich slag is measured by measuring 64.3% and the zinc content is measured by measuring 0.08%;
(4) cooling, dedusting and recovering zinc from roasting tail gas of a rotary kiln: roasting tail gas in a rotary kiln at the temperature of 800 ℃, carrying out heat exchange, cooling to 300 ℃, collecting dust, wherein the obtained dust collecting powder is zinc oxide powder with the content of 57.2%, and discharging the tail gas after washing and desulfurization to reach the standard.
Example 5
A method for recovering iron and zinc from dust and low-carbon sludge of a steel plant comprises the following steps:
(1) mixing materials: adding the dust ash, the low-carbon sludge and the coke powder of the steel plant into a mixer according to the proportion of 4:3:1.5, adding 1% of high-molecular polymer adhesive according to the total amount of the materials, starting the mixer to uniformly mix the materials, and adding a proper amount of spray water according to the water content of the materials in the mixing process to ensure that the water content of the materials is 10%;
(2) material ball pressing, drying and dewatering: feeding the mixed materials into a high-pressure ball-making device, wherein the diameter of the pressed ball is 40mm, the finished ball is dried on a belt dryer until the moisture content is less than 1%, and the compressive strength of the dried ball is 70-100kN/cm2
(3) Roasting the material ball in a rotary kiln to enrich iron and remove zinc: heating the rotary kiln to 1000 ℃ by supplying heat energy through burning gas in the rotary kiln, starting to put in dried pellets to roast materials, controlling the roasting temperature of the materials to 1000 ℃, controlling the air supply quantity to ensure that the kiln is in a reduction state, roasting the materials in the kiln for 1 hour, cooling (recovering heat) the iron-rich slag discharged from the kiln, and then sending the cooled iron-rich slag into a storage yard, wherein the iron content of the iron-rich slag is measured to be 62.02% and the zinc content is measured to be 0.148%;
(4) cooling, dedusting and recovering zinc from roasting tail gas of a rotary kiln: the temperature of tail gas roasted in a rotary kiln is 700 ℃, the tail gas is cooled to 250 ℃ through heat exchange for dust collection, the obtained dust collection powder is zinc oxide powder with the content of 52.2 percent, and the tail gas is discharged after washing and desulfurization and reaching the standard.
Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the technical solution of the present invention is not limited to the above-described embodiments, and many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.

Claims (7)

1. A method for recovering iron and zinc from dust and low-carbon sludge of a steel plant is characterized by comprising the following steps:
(1) mixing materials: adding dust and low-carbon sludge of a steel plant into a mixer according to a certain proportion, adding a proper amount of reduced carbon powder, adding 1-2% of binder according to the total amount of materials, starting the mixer to uniformly mix the materials, and ensuring that the water content of the materials is 5-10% in the mixing process;
(2) material ball pressing, drying and dewatering: feeding the mixed materials into high-pressure ball-making equipment, making the diameter of the pressed ball be 30-50mm, drying the finished ball on a belt-type dryer until the water content is less than 1% and the compression strength of the dried ball is 70-100kN/cm2
(3) Roasting the material ball in a rotary kiln to enrich iron and remove zinc: roasting the materials in the rotary kiln, wherein the roasting temperature of the materials is controlled to be 1000-1300 ℃, and the roasting time is 1-2 hours;
(4) cooling, dedusting and recovering zinc from roasting tail gas of a rotary kiln: the roasting tail gas temperature of the rotary kiln is 600-800 ℃, the dust collection tail gas is cooled to 200-300 ℃ through heat exchange, and the dust collection tail gas is discharged after washing and desulfurization.
2. The method for recovering iron and zinc from dust and low carbon sludge in steel and iron works as claimed in claim 1, wherein the ratio of the dust, the low carbon sludge and the reduced carbon powder in step (1) is (4-6): (2-4): 0.5-1.5).
3. The method for recovering iron and zinc from dust and low carbon sludge of steel and iron plant as claimed in claim 1, wherein the reduced carbon powder in step (1) is coke powder.
4. The method for recovering iron and zinc from dust and low carbon sludge of steel and iron works as claimed in claim 1, wherein the binder in step (1) is a high molecular polymer binder.
5. The method for recovering Fe and Zn from dust and low-carbon sludge of steel and iron works as claimed in claim 4, wherein said high molecular polymer binder is high temperature resistant, non-toxic, harmless and residue-free.
6. The method for recovering iron and zinc from dust and low-carbon sludge in steel and iron plants according to claim 1, wherein in the step (1), a proper amount of spray water is added according to the water content of the materials in the mixing process to ensure that the water content of the materials is 5-10%.
7. The method for recovering iron and zinc from dust and low carbon sludge in steel and iron works as claimed in claim 1, wherein in the step (2), the rotary kiln roasting is to raise the temperature in the rotary kiln by supplying heat energy through gas or coal dust.
CN202110926538.5A 2021-08-12 2021-08-12 Method for recovering iron and zinc from dust and low-carbon sludge collected from steel plant Pending CN113637852A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110926538.5A CN113637852A (en) 2021-08-12 2021-08-12 Method for recovering iron and zinc from dust and low-carbon sludge collected from steel plant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110926538.5A CN113637852A (en) 2021-08-12 2021-08-12 Method for recovering iron and zinc from dust and low-carbon sludge collected from steel plant

Publications (1)

Publication Number Publication Date
CN113637852A true CN113637852A (en) 2021-11-12

Family

ID=78421240

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110926538.5A Pending CN113637852A (en) 2021-08-12 2021-08-12 Method for recovering iron and zinc from dust and low-carbon sludge collected from steel plant

Country Status (1)

Country Link
CN (1) CN113637852A (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101463426A (en) * 2009-01-15 2009-06-24 张钦 Comprehensive utilization method for red mud
CN102534199A (en) * 2012-01-18 2012-07-04 中南大学 Comprehensive utilization process of zinc-containing iron dust
CN103740939A (en) * 2013-12-27 2014-04-23 中冶京诚工程技术有限公司 Method for producing molten iron and recovering zinc by utilizing zinc-containing dust or sludge in steelworks
CN106893867A (en) * 2017-03-10 2017-06-27 武汉科思瑞迪科技有限公司 A kind of method that muffle shaft furnace treatment feed powder containing zinc-iron dirt reclaims zinc
CN107460327A (en) * 2017-07-28 2017-12-12 重庆科技学院 A kind of comprehensive reutilization method of the leaded zinc powder dirt of electric furnace steel making
WO2020107669A1 (en) * 2018-11-26 2020-06-04 贵州大学 Method for recycling zinc by comprehensively utilizing steelmaking dust
CN112111656A (en) * 2020-08-12 2020-12-22 北京科技大学 Method for co-processing zinc-containing and iron-containing dust by blast furnace and rotary kiln
CN112442589A (en) * 2019-08-29 2021-03-05 宝山钢铁股份有限公司 Method and system for co-processing waste incineration fly ash and zinc-containing dust and mud of iron and steel plant

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101463426A (en) * 2009-01-15 2009-06-24 张钦 Comprehensive utilization method for red mud
CN102534199A (en) * 2012-01-18 2012-07-04 中南大学 Comprehensive utilization process of zinc-containing iron dust
CN103740939A (en) * 2013-12-27 2014-04-23 中冶京诚工程技术有限公司 Method for producing molten iron and recovering zinc by utilizing zinc-containing dust or sludge in steelworks
CN106893867A (en) * 2017-03-10 2017-06-27 武汉科思瑞迪科技有限公司 A kind of method that muffle shaft furnace treatment feed powder containing zinc-iron dirt reclaims zinc
CN107460327A (en) * 2017-07-28 2017-12-12 重庆科技学院 A kind of comprehensive reutilization method of the leaded zinc powder dirt of electric furnace steel making
WO2020107669A1 (en) * 2018-11-26 2020-06-04 贵州大学 Method for recycling zinc by comprehensively utilizing steelmaking dust
CN112442589A (en) * 2019-08-29 2021-03-05 宝山钢铁股份有限公司 Method and system for co-processing waste incineration fly ash and zinc-containing dust and mud of iron and steel plant
CN112111656A (en) * 2020-08-12 2020-12-22 北京科技大学 Method for co-processing zinc-containing and iron-containing dust by blast furnace and rotary kiln

Similar Documents

Publication Publication Date Title
CN106367600A (en) Method for treating high-zinc iron-containing slime through utilizing rotary kiln
CN101386913B (en) Method for recovering zinc oxide in Zn-containing dust treatment by rotary hearth furnace
CN110317950B (en) Reduction dezincification method for zinc-containing dust
CN101893387B (en) Process for processing smoke
CN102329909B (en) Method for extracting iron particles and zinc powder from dust of steel and iron plant
CA2538091A1 (en) Self-reducing, cold-bonded pellets
CN101709341A (en) Method for treating iron-containing waste materials in iron and steel plant
CN110129558A (en) Chromium-bearing sludge prepares the method and ferrochrome of ferrochrome
CN105087947B (en) The method that zinc is extracted from blast furnace gas mud
CN112458279A (en) Integrated process method of multi-hearth furnace and rotary hearth furnace
CN102634614B (en) Resourceful treatment method for zinc-containing ironmaking and steelmaking intermediate slag
CN112226615A (en) Comprehensive utilization method of stainless steel solid waste
CN114517260A (en) Metallized pellet directly applying biomass solid waste and molten iron production method
CN210596200U (en) Processing apparatus of high-efficient zinc that removes in follow iron and steel enterprise's zinciferous fly ash
CN217459535U (en) System for steel rolling fatlute and iron-containing zinc dust mud are handled in coordination to rotary hearth furnace
CN113637852A (en) Method for recovering iron and zinc from dust and low-carbon sludge collected from steel plant
CN104060013B (en) A kind of rotary hearth furnace direct-reduction is containing the method for sefstromite
CN101638703B (en) Method for directly reducing nickel containing pig iron by lateritic nickel in tunnel kiln
CN217579030U (en) System for treating oil-containing muddy water of rolled steel by rotary hearth furnace
CN217351484U (en) System for iron-containing zinc dust mud resource utilization
CN212152365U (en) Iron-containing material preheating and pre-reducing device
CN113789421A (en) Comprehensive recycling system and method for fly ash of continuous injection electric furnace entering furnace
CN110564957A (en) Treatment device and method for efficiently removing zinc from zinc-containing dedusting ash of iron and steel enterprises
CN112921172A (en) Method for drying in shade and pelletizing by using converter waste gas
CN210683827U (en) Uniform distribution device for treating steelmaking dust-collecting blast furnace feeding

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20211112

RJ01 Rejection of invention patent application after publication