CN102319617A - Process for recovering iron and carbon elements from blast furnace gas ash - Google Patents
Process for recovering iron and carbon elements from blast furnace gas ash Download PDFInfo
- Publication number
- CN102319617A CN102319617A CN201110232076A CN201110232076A CN102319617A CN 102319617 A CN102319617 A CN 102319617A CN 201110232076 A CN201110232076 A CN 201110232076A CN 201110232076 A CN201110232076 A CN 201110232076A CN 102319617 A CN102319617 A CN 102319617A
- Authority
- CN
- China
- Prior art keywords
- concentrate
- iron
- flotation
- iron content
- magnetic
- 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.)
- Granted
Links
Images
Classifications
-
- 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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to the technical field of blast furnace ash resource reutilization, in particular to a process for recovering iron and carbon elements from blast furnace gas ash. A flotation method is adopted for recovering carbon, a re-separation and magnetic separation method is adopted for recovering iron, the total separation process is the combined technical process flow of flotation, re-separation and magnetic separation, the gas ash enters the coarse flotation after the slurry preparation and medicine adding, coarse flotation concentrates enter fine flotation, the fine flotation concentrates are final carbon concentrates, coarse flotation tailings and fine flotation tailings enter a re-separation coarse separation spiral chute to separate out re-separation tailings, the coarse spiral concentrates enter a fine separation spiral chute to obtain re-separation concentrates, ores in a fine separation spiral chute carries out self circulation, the tailings in the fine separation spiral chute enter a weak magnetic separation machine for carrying out magnetic separation, the weak magnetic concentrates and the re-separation concentrates are combined into final iron concentrates, and the weak magnetic tailings and the re-separation tailings are combined into final tailings. The process has the beneficial effects that the process is simple, the varieties of reagents are few, the process configuration is reasonable, the purification and impurity removal effects are obvious, the product quality is better, the recovery rate is high, and a new path is provided for the comprehensive utilization of the blast furnace gas ash.
Description
Technical field
The present invention relates to blast furnace dust resource reutilization technical field, particularly a kind of technology that from blast furnace dust, reclaims iron and carbon.
Background technology
Blast furnace dust is the flue dust of discharging with blast furnace gas in the blast furnace ironmaking process, collects the dust that obtains through dry collector, and gray is Powdered, and granularity is thick than blast furnace gas mud, and iron mineral is main with FeO.Gas ash is dry, is prone to flow, and stacks, transports seriously polluted.Blast furnace dust is one of main solid waste of iron and steel enterprise, and the iron and steel output of China leaps to the first in the world in recent years, and the blast furnace dust total amount that blast furnace produces is quite big, and in 1.7% of iron output, nearly 2,000,000 tons of gas ash is produced in the whole nation per year.
The chemical composition of blast furnace dust is relevant with the process conditions of going into stove iron material character and blast furnace process.Iron content is 30～40% in the general gas ash; Like Shanghai Mei Shan Iron And Steel Co., Ltd, the new steel vanadium of Panzhihua company, packet header Iron And Steel Co., Ltd, Hailin Iron And Steel Co., Ltd, Anshan Iron and Steel Company etc.; Also there is indivedual steel mills iron content on the low side, is lower than 25% like Xinyu Iron And Steel Co., Ltd gas ash iron content; General carbon content 45～30% also has indivedual steel mills carbon content on the low side, and like packet header Iron And Steel Co., Ltd, carbon content is lower than 30%; General granularity-0.071mm grain size content 35 ~ 55%, also have indivedual companies granularity partially slightly-the 0.071mm grain size content is lower than 30%; Gas ash proportion is lighter.The main valuable mineral that needs in the gas ash to reclaim is iron and carbon, and impurity such as the silica that contains, alundum (Al and the elementary sulfur that is harmful to, zinc etc. need to remove.
Iron that contains in the blast furnace dust and carbon and a small amount of non-ferrous metal belong to valuable secondary resource.Its application in recent years obtains increasing attention, owing to contain a large amount of iron and carbon in the blast furnace dust, extracting valuable elements such as iron and carbon through ore-dressing technique from gas ash is the important development direction of its comprehensive utilization.
The character of blast furnace dust and natural crystal has tangible difference; Fine mineral is fused together under high temperature action; Very easily wrap up gangue mineral; Its composition is more complicated, and the rate of recovery of valuable element is lower, and the basic principle that reclaims iron and carbon is following: 1) iron in the blast furnace dust is mainly with Fe
2O
3, Fe
3O
4Form exists, and can adopt methods such as magnetic separation, gravity treatment to reclaim; 2) carbon in the blast furnace dust mainly exists with the coke form, and its proportion is lighter, surface hydrophobicity and oleophylic can adopt method for floating to separate.
The at present used technology that from blast furnace dust, reclaims iron and carbon has single recovery and combined recovery technology.
Single recovery technology is meant the technology that only adopts a kind of method in magnetic separation, gravity treatment, flotation, the reverse flotation to reclaim, and adopts single recovery technology or concentrate grade is not high, or metal recovery rate is lower, and limitation is bigger, uses less.
Typical combined recovery technology mainly contains: the flow process I: floating-heavy process integration; Flow process II: gravity treatment-reverse flotation-magnetic separation process integration; Flow process III: corase grind-weak magnetic-strong magnetic-reverse floatation process; Flow process IV: ore grinding-magnetic separation-gravity treatment-floatation process; Flow process V: reduction roasting-magnetic separation process.Division is following:
Behind the flow process I gas ash ore grinding with floatation recovery carbon; Reclaim iron with gravity treatment; That flotation is adopted is one thick, sweep, two essences, chats are returned technology in proper order and from gas mud, reclaimed carbon; Reclaim the iron mineral in the flotation tailing with shaking table, can obtain iron ore concentrate and the carbon content 80.09% of all iron content 61.13%, the rate of recovery 56.12%, the carbon ore deposit of the rate of recovery 88.04%.This technology flotation flowsheet is complicated, and power consume is higher, and overall objective is not high;
The flow process II reclaims iron with gravity treatment, reverse flotation, magnetic separation process integration, and can to get grade be 61% qualified concentrate containing, and metal recovery rate reaches 55%, and concentrate yield reaches 40%, reverse floatation process and medicine agent system complicacy, and index is not high,
Flow process III, IV increase ore grinding; The flow process V adopts roasting technique, and energy consumption is all higher relatively, and the sorting index that the flow process IV obtains is: all iron content is greater than 61%; Full iron recovery be 52.85% ~ 61.32% iron ore concentrate and carbon content greater than 75%, the carbon rate of recovery is greater than 88% carbon ore deposit; Flow process V sorting index is an iron concentrate grade 60.70%, and the rate of recovery reaches more than 70%.These three kinds of technic indexs are all not high, and it is higher to sort cost.
Summary of the invention
It is simple to the purpose of this invention is to provide a kind of technology, and easy operating is better to the enriching and recovering effect of iron and carbon, the technology that from blast furnace dust, reclaims iron and carbon that production cost is low.
The objective of the invention is to realize through following technical proposals:
The technology that from blast furnace dust, reclaims iron and carbon of the present invention is characterized in that adopting method for floating to reclaim carbon, adopts heavy, magnetic selection method recovery iron, and its sorting process is " floating, a weight-magnetic separation joint process ", and concrete steps are following:
1) to iron content 30～40%; Carbon content 45～30%, the gas ash of granularity-200 order content 40～55% is directly carried out flotation, gas ash is added the ore pulp of water furnishing weight concentration 33 ~ 37% in first tank diameter; Feed second tank diameter; And in second tank diameter, add floating agent successively, feed rough floatation after the dosing
2) concentrate of rough floatation feeds cleaner flotation, and the concentrate of cleaner flotation is the final carbon ore deposit of carbon content 86 ~ 80%, the carbon rate of recovery 80 ~ 90%,
3) mine tailing of the mine tailing of rough floatation and cleaner flotation lumps together and is flotation tailing, and the flotation tailing of this iron content 44 ~ 52%, weight concentration 40 ~ 45% is fed the spiral sluice of roughly selecting in the gravity treatment,
4) concentrate of roughly selecting the iron content 58 ~ 62% of spiral sluice feeds selected spiral sluice, and roughly select the mine tailing of spiral sluice and abandon,
5) concentrate of selected spiral sluice is the gravity concentrate of iron content 63 ~ 66%, the chats self-loopa of this selected spiral sluice,
6) the magnetic machine carried out magnetic separation a little less than the mine tailing of the iron content 50 ~ 56% of selected spiral sluice fed, and obtained the magnetic concentrate of iron content 62 ~ 64%, the magnetic tailing of dishing out,
7) magnetic concentrate and gravity concentrate lump together and are final iron ore concentrate, and its iron content is 62.5 ~ 65%, the ferrous metal rate of recovery 70 ~ 60%,
8) magnetic tailing and gravity tailings lump together and are the final flowsheet mine tailing, and its iron content is 22 ~ 29%.
Described floating agent is diesel oil and turpentine oil, diesel oil 950 ~ 1150g/t, turpentine oil 185 ~ 235g/t.
The field intensity of said weak magnetic machine is 1600～1800 Ο e.
Perhaps:
1) to iron content 31.46%, carbon content 37.90% ,-gas ash of 0.071mm grade weight percent content 43.6% directly carries out flotation; Gas ash is added water furnishing weight concentration in first tank diameter be 35% ore pulp, feeds second tank diameter, and in second tank diameter, add floating agent successively; Diesel oil 1050 g/t; Turpentine oil 215g/t feeds rough floatation after the dosing
2) concentrate of rough floatation feeds cleaner flotation, and the concentrate of cleaner flotation is the final carbon ore deposit of carbon content 85.26%, the rate of recovery 81.55% of carbon,
3) mine tailing of the mine tailing of rough floatation and cleaner flotation lumps together and is flotation tailing, and the flotation tailing of this iron content 44.27%, weight concentration 45% is fed the spiral sluice of roughly selecting in the gravity treatment,
4) concentrate of roughly selecting the iron content 59.2% of spiral sluice feeds selected spiral sluice, and roughly select the mine tailing of spiral sluice and abandon,
5) concentrate of selected spiral sluice is the gravity concentrate of iron content 64.6%, the chats self-loopa of this selected spiral sluice,
6) to feed field intensity be that the weak magnetic machine of 1600 Ο e carries out magnetic separation to the mine tailing of the iron content 50.2% of selected spiral sluice, obtains the magnetic concentrate of iron content 62%, the magnetic tailing of dishing out,
7) magnetic concentrate and gravity concentrate lump together and are final iron ore concentrate, and its iron content is 63.62%, the ferrous metal rate of recovery 67.75%,
8) magnetic tailing and gravity tailings lump together and are the final flowsheet mine tailing, and its iron content is 22.84%.
Perhaps:
1) to iron content 34.61%, carbon content 36.84%, the gas ash of-0.071mm content 40.2% is directly carried out flotation, gas ash is added the ore pulp of water furnishing weight concentration 35% in first tank diameter; Feed second tank diameter; And in second tank diameter, add floating agent successively, diesel oil 985g/t, turpentine oil 205g/t; Feed rough floatation after the dosing
2) concentrate of rough floatation feeds cleaner flotation, and the concentrate of cleaner flotation is the final carbon ore deposit of carbon content 84.87%, the rate of recovery 81.18% of carbon
3) mine tailing of the mine tailing of rough floatation and cleaner flotation lumps together and is flotation tailing, and the flotation tailing of this iron content 48.19%, weight concentration 43% is fed the spiral sluice of roughly selecting in the gravity treatment,
4) concentrate of roughly selecting the iron content 60.32% of spiral sluice feeds selected spiral sluice, and roughly select the mine tailing of spiral sluice and abandon,
5) concentrate of selected spiral sluice is the gravity concentrate of iron content 65.4%, the chats self-loopa of this selected spiral sluice,
6) to feed field intensity be that the weak magnetic machine of 1700 Ο e carries out magnetic separation to the mine tailing of the iron content 50.86% of selected spiral sluice, obtains the magnetic concentrate of iron content 62.3%, the magnetic tailing of dishing out,
7) magnetic concentrate and gravity concentrate lump together and are final iron ore concentrate, and its iron content is 64.46%, the ferrous metal rate of recovery 67.05%
8) magnetic tailing and gravity tailings lump together and are the final flowsheet mine tailing, and its iron content is 27.82%.
Perhaps:
1) to iron content 38.23%, carbon content 33.20%, the gas ash of-0.071mm content 46.5% is directly carried out flotation, gas ash is added the ore pulp of water furnishing weight concentration 33% in first tank diameter; Feed second tank diameter; And in second tank diameter, add floating agent successively, diesel oil 960g/t, turpentine oil 190g/t; Feed rough floatation after the dosing
2) concentrate of rough floatation feeds cleaner flotation, and the concentrate of cleaner flotation is the final carbon ore deposit of carbon content 85.07%, the carbon rate of recovery 81.74%,
3) mine tailing of the mine tailing of rough floatation and cleaner flotation lumps together and is flotation tailing, and the flotation tailing of this iron content 49.93%, weight concentration 42% is fed the spiral sluice of roughly selecting in the gravity treatment,
4) concentrate of roughly selecting the iron content 60.6% of spiral sluice feeds selected spiral sluice, and roughly select the mine tailing of spiral sluice and abandon,
5) concentrate of selected spiral sluice is the gravity concentrate of iron content 65.86%, the chats self-loopa of this selected spiral sluice,
6) to feed field intensity be that the weak magnetic machine of 1800 Ο e carries out magnetic separation to the mine tailing of the iron content 52.46% of selected spiral sluice, obtains the magnetic concentrate of iron content 62.8%, the magnetic tailing of dishing out,
7) magnetic concentrate and gravity concentrate lump together and are final iron ore concentrate, and its iron content is 64.75%, the ferrous metal rate of recovery 67.80%,
8) magnetic tailing and gravity tailings lump together and are the final flowsheet mine tailing, and its iron content is 28.80%.
Perhaps:
1) to iron content 38.23%, carbon content 33.20% ,-0.071mm content directly carries out flotation in 46.5% gas ash; Gas ash is added the ore pulp of water furnishing weight concentration 35% in first tank diameter, feed second tank diameter, and in second tank diameter, add floating agent successively; Diesel oil 975g/t; Turpentine oil 200g/t feeds rough floatation after the dosing
2) concentrate of rough floatation feeds cleaner flotation, and the concentrate of cleaner flotation is the final carbon ore deposit of carbon content 81.47%, the rate of recovery 88.27% of carbon,
3) mine tailing of the mine tailing of rough floatation and cleaner flotation lumps together and is flotation tailing, and the flotation tailing of this iron content 50.94%, weight concentration 42% is fed the spiral sluice of roughly selecting in the gravity treatment,
4) concentrate of roughly selecting the iron content 60.4% of spiral sluice feeds selected spiral sluice, and roughly select the mine tailing of spiral sluice and abandon,
5) concentrate of selected spiral sluice is the gravity concentrate of iron content 64.8%, the chats self-loopa of this selected spiral sluice,
6) to feed field intensity be that the weak magnetic machine of 1700 Ο e carries out magnetic separation to the mine tailing of the iron content 51.4% of selected spiral sluice, obtains the magnetic concentrate of iron content 61.9%, the magnetic tailing of dishing out,
7) magnetic concentrate and gravity concentrate lump together and are final iron ore concentrate, and its iron content is 63.5%, the ferrous metal rate of recovery 69.10%,
8) magnetic tailing and gravity tailings lump together and are the final flowsheet mine tailing, and its iron content is 27.64%.
The present invention has taken into full account on-the-spot operability on experimental basis, confirm to adopt method for floating to reclaim carbon, and employing is heavy, magnetic selection method reclaims iron, and total sorting process is " floating, a weight-magnetic joint process ".Smart powder of iron and carbon dust can be got back to smelting process and use as high-quality furnace charge and fuel, and mine tailing can be reused as building materials raw materials such as cement after concentrating, dewatering.
The invention has the beneficial effects as follows: the new technology that from gas ash, reclaims useful iron and carbon is " floating, weight-magnetic " associating sorting process; Compare with present flow process, it is simple to have technology, and configuration rationally; The easy operating direct motion; Enriching and recovering to iron and carbon is effective, the carbon rate of recovery 80 ~ 90%, iron overall recovery 70 ~ 60%.Clearance to zinc is higher, and it is remarkable with impurity-eliminating effect to purify, the product quality height, and technical indicator has clear superiority, for the comprehensive utilization of blast furnace dust provides new way, reaches the purpose of high efficiente callback resource.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment
Below in conjunction with the description of drawings specific embodiment of the present invention.
As shown in Figure 1, the technology that from blast furnace dust, reclaims iron and carbon of the present invention is characterized in that adopting method for floating to reclaim carbon, adopts heavy, magnetic selection method recovery iron, and its sorting process is " floating, a weight-magnetic separation joint process ", and detailed process is:
1) to iron content 30～40%, carbon content 45～30%, the gas ash of granularity-200 order content 40～55% is directly carried out flotation; Gas ash is added the ore pulp of water furnishing weight concentration 33 ~ 37% in first tank diameter, feed second tank diameter, and in second tank diameter, add floating agent successively; This floating agent is diesel oil and turpentine oil, diesel oil 950 ~ 1150g/t, turpentine oil 185 ~ 235g/t; Feed rough floatation after the dosing
2) concentrate of rough floatation feeds cleaner flotation, and the concentrate of cleaner flotation is the final carbon ore deposit of carbon content 86 ~ 80%, the carbon rate of recovery 80 ~ 90%,
3) mine tailing of the mine tailing of rough floatation and cleaner flotation lumps together and is flotation tailing, and the flotation tailing of this iron content 44 ~ 52%, weight concentration 40 ~ 45% is fed the spiral sluice of roughly selecting in the gravity treatment,
4) concentrate of roughly selecting the iron content 58 ~ 62% of spiral sluice feeds selected spiral sluice, and roughly select the mine tailing of spiral sluice and abandon,
5) concentrate of selected spiral sluice is the gravity concentrate of iron content 63 ~ 66%, the chats self-loopa of this selected spiral sluice,
6) to feed field intensity be that the weak magnetic machine of 1600～1800 Ο e carries out magnetic separation to the mine tailing of the iron content 50 ~ 56% of selected spiral sluice, obtains the magnetic concentrate of iron content 62 ~ 64%, the magnetic tailing of dishing out,
7) magnetic concentrate and gravity concentrate lump together and are final iron ore concentrate, and its iron content is 62.5 ~ 65%, the ferrous metal rate of recovery 70 ~ 60%,
8) magnetic tailing and gravity tailings lump together and are the final flowsheet mine tailing, and its iron content is 22 ~ 29%.
Embodiment
In the Anshan iron and steel plant blast furnace dust weight percent content fluctuation range of iron 30 ~ 40%, the weight percent content fluctuation range of carbon 40 ~ 30% ,-0.071mm grade weight percent content is 40 ~ 55%, possesses the characteristic of general blast furnace dust.Concrete steps are following:
Embodiment 1
1) to iron content 31.46%, carbon content 37.90% ,-gas ash of 0.071mm grade weight percent content 43.6% directly carries out flotation; Gas ash is added water furnishing weight concentration in first tank diameter be 35% ore pulp, feeds second tank diameter, and in second tank diameter, add floating agent successively; Diesel oil 1050 g/t; Turpentine oil 215g/t feeds rough floatation after the dosing
2) concentrate of rough floatation feeds cleaner flotation, and the concentrate of cleaner flotation is the final carbon ore deposit of carbon content 85.26%, the rate of recovery 81.55% of carbon,
3) mine tailing of the mine tailing of rough floatation and cleaner flotation lumps together and is flotation tailing, and the flotation tailing of this iron content 44.27%, weight concentration 45% is fed the spiral sluice of roughly selecting in the gravity treatment,
4) concentrate of roughly selecting the iron content 59.2% of spiral sluice feeds selected spiral sluice, and roughly select the mine tailing of spiral sluice and abandon,
5) concentrate of selected spiral sluice is the gravity concentrate of iron content 64.6%, the chats self-loopa of this selected spiral sluice,
6) to feed field intensity be that the weak magnetic machine of 1600 Ο e carries out magnetic separation to the mine tailing of the iron content 50.2% of selected spiral sluice, obtains the magnetic concentrate of iron content 62%, the magnetic tailing of dishing out,
7) magnetic concentrate and gravity concentrate lump together and are final iron ore concentrate, and its iron content is 63.62%, the ferrous metal rate of recovery 67.75%,
8) magnetic tailing and gravity tailings lump together and are the final flowsheet mine tailing, and its iron content is 22.84%.
Embodiment 2:
1) to iron content 34.61%, carbon content 36.84%, the gas ash of-0.071mm content 40.2% is directly carried out flotation, gas ash is added the ore pulp of water furnishing weight concentration 35% in first tank diameter; Feed second tank diameter; And in second tank diameter, add floating agent successively, diesel oil 985g/t, turpentine oil 205g/t; Feed rough floatation after the dosing
2) concentrate of rough floatation feeds cleaner flotation, and the concentrate of cleaner flotation is the final carbon ore deposit of carbon content 84.87%, the rate of recovery 81.18% of carbon,
3) mine tailing of the mine tailing of rough floatation and cleaner flotation lumps together and is flotation tailing, and the flotation tailing of this iron content 48.19%, weight concentration 43% is fed the spiral sluice of roughly selecting in the gravity treatment,
4) concentrate of roughly selecting the iron content 60.32% of spiral sluice feeds selected spiral sluice, and roughly select the mine tailing of spiral sluice and abandon,
5) concentrate of selected spiral sluice is the gravity concentrate of iron content 65.4%, the chats self-loopa of this selected spiral sluice,
6) to feed field intensity be that the weak magnetic machine of 1700 Ο e carries out magnetic separation to the mine tailing of the iron content 50.86% of selected spiral sluice, obtains the magnetic concentrate of iron content 62.3%, the magnetic tailing of dishing out,
7) magnetic concentrate and gravity concentrate lump together and are final iron ore concentrate, and its iron content is 64.46%, the ferrous metal rate of recovery 67.05%,
8) magnetic tailing and gravity tailings lump together and are the final flowsheet mine tailing, and its iron content is 27.82%.
Embodiment 3:
1) to iron content 38.23%, carbon content 33.20%, the gas ash of-0.071mm content 46.5% is directly carried out flotation, gas ash is added the ore pulp of water furnishing weight concentration 33% in first tank diameter; Feed second tank diameter; And in second tank diameter, add floating agent successively, diesel oil 960g/t, turpentine oil 190g/t; Feed rough floatation after the dosing
2) concentrate of rough floatation feeds cleaner flotation, and the concentrate of cleaner flotation is the final carbon ore deposit of carbon content 85.07%, the carbon rate of recovery 81.74%,
3) mine tailing of the mine tailing of rough floatation and cleaner flotation lumps together and is flotation tailing, and the flotation tailing of this iron content 49.93%, weight concentration 42% is fed the spiral sluice of roughly selecting in the gravity treatment,
4) concentrate of roughly selecting the iron content 60.6% of spiral sluice feeds selected spiral sluice, and roughly select the mine tailing of spiral sluice and abandon,
5) concentrate of selected spiral sluice is the gravity concentrate of iron content 65.86%, the chats self-loopa of this selected spiral sluice,
6) to feed field intensity be that the weak magnetic machine of 1800 Ο e carries out magnetic separation to the mine tailing of the iron content 52.46% of selected spiral sluice, obtains the magnetic concentrate of iron content 62.8%, the magnetic tailing of dishing out,
7) magnetic concentrate and gravity concentrate lump together and are final iron ore concentrate, and its iron content is 64.75%, the ferrous metal rate of recovery 67.80%,
8) magnetic tailing and gravity tailings lump together and are the final flowsheet mine tailing, and its iron content is 28.80%.
Embodiment 4:
1) to iron content 38.23%, carbon content 33.20% ,-0.071mm content directly carries out flotation in 46.5% gas ash; Gas ash is added the ore pulp of water furnishing weight concentration 35% in first tank diameter, feed second tank diameter, and in second tank diameter, add floating agent successively; Diesel oil 975g/t; Turpentine oil 200g/t feeds rough floatation after the dosing
2) concentrate of rough floatation feeds cleaner flotation, and the concentrate of cleaner flotation is the final carbon ore deposit of carbon content 81.47%, the rate of recovery 88.27% of carbon,
3) mine tailing of the mine tailing of rough floatation and cleaner flotation lumps together and is flotation tailing, and the flotation tailing of this iron content 50.94%, weight concentration 42% is fed the spiral sluice of roughly selecting in the gravity treatment,
4) concentrate of roughly selecting the iron content 60.4% of spiral sluice feeds selected spiral sluice, and roughly select the mine tailing of spiral sluice and abandon,
5) concentrate of selected spiral sluice is the gravity concentrate of iron content 64.8%, the chats self-loopa of this selected spiral sluice,
6) to feed field intensity be that the weak magnetic machine of 1700 Ο e carries out magnetic separation to the mine tailing of the iron content 51.4% of selected spiral sluice, obtains the magnetic concentrate of iron content 61.9%, the magnetic tailing of dishing out,
7) magnetic concentrate and gravity concentrate lump together and are final iron ore concentrate, and its iron content is 63.5%, the ferrous metal rate of recovery 69.10%,
8) magnetic tailing and gravity tailings lump together and are the final flowsheet mine tailing, and its iron content is 27.64%.
This shows, in gas ash iron and carbon content not simultaneously, its effect that sorts recovery is different, sorting result is also relevant with character such as its granularity, sees that totally sorting result is better.
Should be noted that described in this patent in the carbon ore deposit that the iron content value is for a certain given gas ash raw material in carbon content, the iron ore concentrate; Has certain adjustment space (seeing embodiment 3 and example 4); Can make suitable adjustment as required; Mainly be flotation operation and reselection operation, this makes technology have certain flexibility.According to the Anshan iron and steel plant blast furnace dust repeatedly result of study draw; The adjustable zone of reasonableness of carbon content is between 80 ~ 86% in the carbon ore deposit, and the adjustable zone of reasonableness of iron content is between 62.5 ~ 65%, certainly in the iron ore concentrate; When product has valence component content higher; Yield is reduced, and the corresponding raising of tailings grade needs according to technology and actual conditions reasonable operation when therefore using.
The iron ore concentrate single fire value of the grade 62.50% that warp calculating is reclaimed is suitable with the magnetite concentrate single fire value of ore dressing plant, Anshan iron and steel plant The Great Hermit Hill grade 66.8%; Cylinder calorific value 6500Cal/g during carbon content 81.25% through chemical examination is reclaimed carbon ore deposit; Explain that product quality is better, iron ore concentrate that therefore reclaims and carbon ore deposit can return the ironmaking operation and use as quality raw materials and fuel; Main Ingredients and Appearance is the iron content hydrochlorate in the technology mine tailing, can process the back and use as building materials such as cement batching.
Claims (7)
1. a technology that from blast furnace dust, reclaims iron and carbon is characterized in that adopting method for floating to reclaim carbon, adopts heavy, magnetic selection method recovery iron, and its sorting process is " floating, a weight-magnetic separation joint process ", and concrete steps are following:
1) to (percentage by weight) iron content 30～40%; Carbon content 45～30%, the gas ash of granularity-200 order content 40～55% is directly carried out flotation, gas ash is added the ore pulp of water furnishing weight concentration 33 ~ 37% in first tank diameter; Feed second tank diameter; And in second tank diameter, add floating agent successively, feed rough floatation after the dosing
2) concentrate of rough floatation feeds cleaner flotation, and the concentrate of cleaner flotation is the final carbon ore deposit of carbon content 86 ~ 80%, the carbon rate of recovery 80 ~ 90%,
3) mine tailing of the mine tailing of rough floatation and cleaner flotation lumps together and is flotation tailing, and the flotation tailing of this iron content 44 ~ 52%, weight concentration 40 ~ 45% is fed the spiral sluice of roughly selecting in the gravity treatment,
4) concentrate of roughly selecting the iron content 58 ~ 62% of spiral sluice feeds selected spiral sluice, and roughly select the mine tailing of spiral sluice and abandon,
5) concentrate of selected spiral sluice is the gravity concentrate of iron content 63 ~ 66%, the chats self-loopa of this selected spiral sluice,
6) the magnetic machine carried out magnetic separation a little less than the mine tailing of the iron content 50 ~ 56% of selected spiral sluice fed, and obtained the magnetic concentrate of iron content 62 ~ 64%, the magnetic tailing of dishing out,
7) magnetic concentrate and gravity concentrate lump together and are final iron ore concentrate, and its iron content is 62.5 ~ 65%, the ferrous metal rate of recovery 70 ~ 60%,
8) magnetic tailing and gravity tailings lump together and are the final flowsheet mine tailing, and its iron content is 22 ~ 29%.
2. the technology that from blast furnace dust, reclaims iron and carbon according to claim 1 is characterized in that described floating agent is diesel oil and turpentine oil, diesel oil 950 ~ 1150g/t, turpentine oil 185 ~ 235g/t.
3. the technology that from blast furnace dust, reclaims iron and carbon according to claim 1 is characterized in that the field intensity of said weak magnetic machine is 1600～1800 Ο e.
4. the technology that from blast furnace dust, reclaims iron and carbon according to claim 1 is characterized in that:
1) to iron content 31.46%, carbon content 37.90% ,-gas ash of 0.071mm grade weight percent content 43.6% directly carries out flotation; Gas ash is added water furnishing weight concentration in first tank diameter be 35% ore pulp, feeds second tank diameter, and in second tank diameter, add floating agent successively; Diesel oil 1050 g/t; Turpentine oil 215g/t feeds rough floatation after the dosing
2) concentrate of rough floatation feeds cleaner flotation, and the concentrate of cleaner flotation is the final carbon ore deposit of carbon content 85.26%, the rate of recovery 81.55% of carbon,
3) mine tailing of the mine tailing of rough floatation and cleaner flotation lumps together and is flotation tailing, and the flotation tailing of this iron content 44.27%, weight concentration 45% is fed the spiral sluice of roughly selecting in the gravity treatment,
4) concentrate of roughly selecting the iron content 59.2% of spiral sluice feeds selected spiral sluice, and roughly select the mine tailing of spiral sluice and abandon,
5) concentrate of selected spiral sluice is the gravity concentrate of iron content 64.6%, the chats self-loopa of this selected spiral sluice,
6) to feed field intensity be that the weak magnetic machine of 1600 Ο e carries out magnetic separation to the mine tailing of the iron content 50.2% of selected spiral sluice, obtains the magnetic concentrate of iron content 62%, the magnetic tailing of dishing out,
7) magnetic concentrate and gravity concentrate lump together and are final iron ore concentrate, and its iron content is 63.62%, the ferrous metal rate of recovery 67.75%,
8) magnetic tailing and gravity tailings lump together and are the final flowsheet mine tailing, and its iron content is 22.84%.
5. the technology that from blast furnace dust, reclaims iron and carbon according to claim 1 is characterized in that:
1) to iron content 34.61%, carbon content 36.84%, the gas ash of-0.071mm content 40.2% is directly carried out flotation, gas ash is added the ore pulp of water furnishing weight concentration 35% in first tank diameter; Feed second tank diameter; And in second tank diameter, add floating agent successively, diesel oil 985g/t, turpentine oil 205g/t; Feed rough floatation after the dosing
2) concentrate of rough floatation feeds cleaner flotation, and the concentrate of cleaner flotation is the final carbon ore deposit of carbon content 84.87%, the rate of recovery 81.18% of carbon
3) mine tailing of the mine tailing of rough floatation and cleaner flotation lumps together and is flotation tailing, and the flotation tailing of this iron content 48.19%, weight concentration 43% is fed the spiral sluice of roughly selecting in the gravity treatment,
4) concentrate of roughly selecting the iron content 60.32% of spiral sluice feeds selected spiral sluice, and roughly select the mine tailing of spiral sluice and abandon,
5) concentrate of selected spiral sluice is the gravity concentrate of iron content 65.4%, the chats self-loopa of this selected spiral sluice,
6) to feed field intensity be that the weak magnetic machine of 1700 Ο e carries out magnetic separation to the mine tailing of the iron content 50.86% of selected spiral sluice, obtains the magnetic concentrate of iron content 62.3%, the magnetic tailing of dishing out,
7) magnetic concentrate and gravity concentrate lump together and are final iron ore concentrate, and its iron content is 64.46%, the ferrous metal rate of recovery 67.05%
8) magnetic tailing and gravity tailings lump together and are the final flowsheet mine tailing, and its iron content is 27.82%.
6. the technology that from blast furnace dust, reclaims iron and carbon according to claim 1 is characterized in that:
1) to iron content 38.23%, carbon content content 33.20%, the gas ash of-0.071mm content 46.5% is directly carried out flotation, gas ash is added the ore pulp of water furnishing weight concentration 33% in first tank diameter; Feed second tank diameter; And in second tank diameter, add floating agent successively, diesel oil 960g/t, turpentine oil 190g/t; Feed rough floatation after the dosing
2) concentrate of rough floatation feeds cleaner flotation, and the concentrate of cleaner flotation is the final carbon ore deposit of carbon content 85.07%, the carbon rate of recovery 81.74%,
3) mine tailing of the mine tailing of rough floatation and cleaner flotation lumps together and is flotation tailing, and the flotation tailing of this iron content 49.93%, weight concentration 42% is fed the spiral sluice of roughly selecting in the gravity treatment,
4) concentrate of roughly selecting the iron content 60.6% of spiral sluice feeds selected spiral sluice, and roughly select the mine tailing of spiral sluice and abandon,
5) concentrate of selected spiral sluice is the gravity concentrate of iron content 65.86%, the chats self-loopa of this selected spiral sluice,
6) to feed field intensity be that the weak magnetic machine of 1800 Ο e carries out magnetic separation to the mine tailing of the iron content 52.46% of selected spiral sluice, obtains the magnetic concentrate of iron content 62.8%, the magnetic tailing of dishing out,
7) magnetic concentrate and gravity concentrate lump together and are final iron ore concentrate, and its iron content is 64.75%, the ferrous metal rate of recovery 67.80%,
8) magnetic tailing and gravity tailings lump together and are the final flowsheet mine tailing, and its iron content is 28.80%.
7. the technology that from blast furnace dust, reclaims iron and carbon according to claim 1 is characterized in that:
1) to iron content 38.23%, carbon content 33.20% ,-0.071mm content directly carries out flotation in 46.5% gas ash; Gas ash is added the ore pulp of water furnishing weight concentration 35% in first tank diameter, feed second tank diameter, and in second tank diameter, add floating agent successively; Diesel oil 975g/t; Turpentine oil 200g/t feeds rough floatation after the dosing
2) concentrate of rough floatation feeds cleaner flotation, and the concentrate of cleaner flotation is the final carbon ore deposit of carbon content 81.47%, the rate of recovery 88.27% of carbon,
3) mine tailing of the mine tailing of rough floatation and cleaner flotation lumps together and is flotation tailing, and the flotation tailing of this iron content 50.94%, weight concentration 42% is fed the spiral sluice of roughly selecting in the gravity treatment,
4) concentrate of roughly selecting the iron content 60.4% of spiral sluice feeds selected spiral sluice, and roughly select the mine tailing of spiral sluice and abandon,
5) concentrate of selected spiral sluice is the gravity concentrate of iron content 64.8%, the chats self-loopa of this selected spiral sluice,
6) to feed field intensity be that the weak magnetic machine of 1700 Ο e carries out magnetic separation to the mine tailing of the iron content 51.4% of selected spiral sluice, obtains the magnetic concentrate of iron content 61.9%, the magnetic tailing of dishing out,
7) magnetic concentrate and gravity concentrate lump together and are final iron ore concentrate, and its iron content is 63.5%, the ferrous metal rate of recovery 69.10%,
8) magnetic tailing and gravity tailings lump together and are the final flowsheet mine tailing, and its iron content is 27.64%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102320763A CN102319617B (en) | 2011-08-15 | 2011-08-15 | Process for recovering iron and carbon elements from blast furnace gas ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102320763A CN102319617B (en) | 2011-08-15 | 2011-08-15 | Process for recovering iron and carbon elements from blast furnace gas ash |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102319617A true CN102319617A (en) | 2012-01-18 |
| CN102319617B CN102319617B (en) | 2013-01-16 |
Family
ID=45447522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102320763A Active CN102319617B (en) | 2011-08-15 | 2011-08-15 | Process for recovering iron and carbon elements from blast furnace gas ash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102319617B (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747228A (en) * | 2012-07-18 | 2012-10-24 | 云南昆欧科技有限责任公司 | Method for recycling valuable elements from blast furnace gas mud |
| CN103230831A (en) * | 2013-05-06 | 2013-08-07 | 河北联合大学 | Processing and utilizing method for extracting carbon and iron from blast furnace metallurgy dust and sludge |
| CN103436644A (en) * | 2013-08-13 | 2013-12-11 | 柳州贤铭科技有限公司 | Method for efficiently recovering dust sludge containing C and Fe in iron and steel industry |
| CN103551244A (en) * | 2013-11-21 | 2014-02-05 | 河北联合大学 | Method for recycling valuable elements from blast furnace flocculated dust |
| CN104258981A (en) * | 2014-09-15 | 2015-01-07 | 中冶北方（大连）工程技术有限公司 | Franklinite screening process |
| CN105063254A (en) * | 2015-07-16 | 2015-11-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for separating iron, zinc and carbon in blast furnace sludge |
| CN105567888A (en) * | 2015-12-23 | 2016-05-11 | 北京科技大学 | Method for recovering fine iron powder from ferrous metallurgy iron-contained dust by using hydraulic cyclone separation method |
| CN109622240A (en) * | 2019-01-17 | 2019-04-16 | 山东泰东环保科技股份有限公司 | A kind of flotation unit and metallurgical dedusting ash ferro element method of purification |
| CN110066914A (en) * | 2019-06-06 | 2019-07-30 | 鑫联环保科技股份有限公司 | A method of recycling metallic iron from blast furnace dust |
| CN110369119A (en) * | 2019-07-15 | 2019-10-25 | 武汉市金驰海科技有限公司 | A kind of steel mill's dust waste iron, carbon, zinc comprehensive recycling process |
| CN110586318A (en) * | 2019-10-23 | 2019-12-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for comprehensive utilization of blast furnace ash |
| CN111151373A (en) * | 2019-06-17 | 2020-05-15 | 华北理工大学 | Method for extracting carbon, iron and zinc from blast furnace cloth bag dust |
| CN112958275A (en) * | 2021-02-03 | 2021-06-15 | 许泽胜 | Method for flotation of coal from coal-containing casting dust |
| CN114314638A (en) * | 2021-12-29 | 2022-04-12 | 阜新成泰环保科技有限公司 | Process for producing glaze-grade zinc oxide by using blast furnace gas ash |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1765527A (en) * | 2005-10-17 | 2006-05-03 | 李学曾 | Separation technique of blast furnace ferrous fines |
| CN102085526A (en) * | 2010-11-16 | 2011-06-08 | 山东乾舜矿冶科技股份有限公司 | Recycling method of blast furnace dust generated in steel making industry |
-
2011
- 2011-08-15 CN CN2011102320763A patent/CN102319617B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1765527A (en) * | 2005-10-17 | 2006-05-03 | 李学曾 | Separation technique of blast furnace ferrous fines |
| CN102085526A (en) * | 2010-11-16 | 2011-06-08 | 山东乾舜矿冶科技股份有限公司 | Recycling method of blast furnace dust generated in steel making industry |
Non-Patent Citations (3)
| Title |
|---|
| 李国风: "鞍钢西尾矿库现状和尾矿的综合利用", 《中国矿业》, no. 03, 31 March 1999 (1999-03-31) * |
| 胡永平等: "《高炉瓦斯泥的回收与利用》", 《环境工程》, vol. 14, no. 6, 31 December 1996 (1996-12-31), pages 50 - 53 * |
| 闫永旺等: "《从高炉瓦斯灰中分选铁和碳的试验研究》", 《内蒙古科技大学学报》, vol. 27, no. 01, 31 March 2008 (2008-03-31) * |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747228A (en) * | 2012-07-18 | 2012-10-24 | 云南昆欧科技有限责任公司 | Method for recycling valuable elements from blast furnace gas mud |
| CN103230831A (en) * | 2013-05-06 | 2013-08-07 | 河北联合大学 | Processing and utilizing method for extracting carbon and iron from blast furnace metallurgy dust and sludge |
| CN103230831B (en) * | 2013-05-06 | 2015-06-03 | 河北联合大学 | Processing and utilizing method for extracting carbon and iron from blast furnace metallurgy dust and sludge |
| CN103436644A (en) * | 2013-08-13 | 2013-12-11 | 柳州贤铭科技有限公司 | Method for efficiently recovering dust sludge containing C and Fe in iron and steel industry |
| CN103436644B (en) * | 2013-08-13 | 2015-04-08 | 柳州贤铭科技有限公司 | Method for efficiently recovering dust sludge containing C and Fe in iron and steel industry |
| CN103551244B (en) * | 2013-11-21 | 2015-07-01 | 河北联合大学 | Method for recycling valuable elements from blast furnace flocculated dust |
| CN103551244A (en) * | 2013-11-21 | 2014-02-05 | 河北联合大学 | Method for recycling valuable elements from blast furnace flocculated dust |
| CN104258981B (en) * | 2014-09-15 | 2016-08-24 | 中冶北方（大连）工程技术有限公司 | A kind of franklinite sorting process |
| CN104258981A (en) * | 2014-09-15 | 2015-01-07 | 中冶北方（大连）工程技术有限公司 | Franklinite screening process |
| CN105063254B (en) * | 2015-07-16 | 2017-05-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for separating iron, zinc and carbon in blast furnace sludge |
| CN105063254A (en) * | 2015-07-16 | 2015-11-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for separating iron, zinc and carbon in blast furnace sludge |
| CN105567888A (en) * | 2015-12-23 | 2016-05-11 | 北京科技大学 | Method for recovering fine iron powder from ferrous metallurgy iron-contained dust by using hydraulic cyclone separation method |
| CN109622240A (en) * | 2019-01-17 | 2019-04-16 | 山东泰东环保科技股份有限公司 | A kind of flotation unit and metallurgical dedusting ash ferro element method of purification |
| CN110066914A (en) * | 2019-06-06 | 2019-07-30 | 鑫联环保科技股份有限公司 | A method of recycling metallic iron from blast furnace dust |
| CN111151373A (en) * | 2019-06-17 | 2020-05-15 | 华北理工大学 | Method for extracting carbon, iron and zinc from blast furnace cloth bag dust |
| CN111151373B (en) * | 2019-06-17 | 2022-04-08 | 华北理工大学 | Method for extracting carbon, iron and zinc from blast furnace cloth bag dust |
| CN110369119A (en) * | 2019-07-15 | 2019-10-25 | 武汉市金驰海科技有限公司 | A kind of steel mill's dust waste iron, carbon, zinc comprehensive recycling process |
| CN110586318B (en) * | 2019-10-23 | 2022-03-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for comprehensive utilization of blast furnace ash |
| CN110586318A (en) * | 2019-10-23 | 2019-12-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for comprehensive utilization of blast furnace ash |
| CN112958275A (en) * | 2021-02-03 | 2021-06-15 | 许泽胜 | Method for flotation of coal from coal-containing casting dust |
| CN114314638A (en) * | 2021-12-29 | 2022-04-12 | 阜新成泰环保科技有限公司 | Process for producing glaze-grade zinc oxide by using blast furnace gas ash |
| CN114314638B (en) * | 2021-12-29 | 2024-03-01 | 阜新成泰环保科技有限公司 | Process for producing glaze-grade zinc oxide by using blast furnace gas ash |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102319617B (en) | 2013-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102319617B (en) | Process for recovering iron and carbon elements from blast furnace gas ash | |
| CN100592933C (en) | Novel rhombohedral iron ore beneficiation technics | |
| CN101716553B (en) | Kiln slag processing technology of zinc volatilizing kiln | |
| CN101654717B (en) | Comprehensive treatment method of blast furnace dedusting ash | |
| CN101792867B (en) | Combined flow treatment method of tin rough concentrate | |
| CN100515576C (en) | Super fine lean lead-antimony-zinc flacculation carrier flotation technology | |
| CN102363218B (en) | Method for producing copper-powder-containing iron by reducing copper-containing furnace cinders directly | |
| CN101637744A (en) | Method for recovering and utilizing kiln slag of zinc hydrometallurgy volatilizing kiln | |
| CN102527498B (en) | Non-cyanide ore dressing method for gold-copper-lead sulfide ore | |
| CN102773161A (en) | Magnetic-gravity combined ore dressing technology for hematite | |
| CN101733190A (en) | Benefication method for sulphur-containing composite iron tailing | |
| CN101491789A (en) | Beneficiation process of mixed dregs using three copper smelting methods of flash smelting furnace, revolving furnace and depletion electric furnace | |
| CN101318159A (en) | Novel process for recycling Anshan type lean octahedral iron ore mine tailing | |
| CN102211055A (en) | Heavy magnetic suspension joint production method for recovering copper from copper smelting slag with high elemental copper content | |
| CN102851414A (en) | Treatment technique of blast furnace fly ash | |
| CN101890394A (en) | Ore dressing process for weakly magnetic iron ore | |
| CN103071596A (en) | Method for recycling fine and superfine cassiterites from oxidized lode tin mud tailings | |
| CN101632957A (en) | Process for processing hematite ore containing iron carbonate | |
| CN109604050B (en) | Environment-friendly titanium selection method for iron-selecting tailings | |
| CN103551244A (en) | Method for recycling valuable elements from blast furnace flocculated dust | |
| CN101537394A (en) | Chemical-adding scrubbing beneficiation and enrichment method suitable for clay vanadium ore | |
| CN108178532A (en) | A kind of method of copper ashes flotation tailings comprehensive utilization | |
| CN102773156A (en) | Beneficiation method for producing blast furnace lump ore by hematite at medium-high grade | |
| CN102744144A (en) | Beneficiation method for preparing kyanite ores | |
| CN100430145C (en) | Method for magnetic separating of aluminum and iron in high iron bauxite |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee before: Angang Group Mine Company |