CN104745808A - Process for efficiently sintering multi-matrix powder - Google Patents
Process for efficiently sintering multi-matrix powder Download PDFInfo
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- CN104745808A CN104745808A CN201510164682.4A CN201510164682A CN104745808A CN 104745808 A CN104745808 A CN 104745808A CN 201510164682 A CN201510164682 A CN 201510164682A CN 104745808 A CN104745808 A CN 104745808A
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- matrix powder
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- many matrix
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- 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 process for efficiently sintering multi-matrix powder. The process comprises the following steps: (1) preparing a sintered material; (2) preparing materials; (3) mixing; (4) performing ignition control; and (5) processing the agglomerate. The process for efficiently sintering the multi-matrix powder has the characteristics of large product output, good product quality and low energy consumption.
Description
Technical field
The present invention relates to a kind of efficient many matrix powder sintering process.
Background technology
Since the seventies in last century, China's iron mineral powder agglomeration industry achieves very large achievement.Before 1970, the type of China's sinter machine is all at below 75m2.After the seventies, particularly Baosteel in 1985 is gone into operation from the 450m2 large-type sinterer that Japan introduces and to be relied on and sintering plant in organizing nation designs, manufactured 130 m2 sinter machines, ring-type air-bleed cooling machine and corresponding more than 20 kinds of support equipments, and the maximization of China's sinter machine is stepped a stage.During this period, carried out agglomerate cooling (oscillatory type cooling and disc type cooling) and added the tackling key problem of grate-layer material, promoted production high basicity sinter and deep-bed sintering technology at national sintering plant simultaneously." mass movement to make iron and steel " period in 1958, the Longyan Prefecture of relatively concentrating in iron mine, starts to develop air blast soil sintering, is commonly called as " level land is blown ".In March nineteen sixty-eight, three steel First 18 square metres sinter machines are started building.In April, 1970, be constructed and put into operation.Modern SINTERING PRODUCTION is by powdered iron ore, flux, fuel, surrogate and returns mine and form compound by a certain percentage, is equipped with suitable water, after mixing and pelletizing, the chassis of air-draft sintering machine sinters from top to bottom.Whole sinter bed (600mm ~ 700mm) can be divided into: sintering ore bed, zone of combustion, preliminary heating zone and cooling layer.From 1989 to 2007, China's sintering industry developed rapidly, and a large amount of novel process, new technology, new installation are released successively.
The iron and steel enterprise of China also has larger development space, but internal and international dog-eat-dog, and same sintering plant also faces market economy and regulates.Current problem anxious to be resolved improves the quality of agglomerate; SINTERING PRODUCTION development trend is the maximization progressively realizing sinter machine; Adopt raw material blending technology, improve the Under Different Concentrate Supplementing Level of sintering; Improve the gentle production rate of Automated water, make great efforts the cost reducing agglomerate; Strengthen environment protection treating; Accelerate to increase pellet consumption, improve the burden structure of China's blast furnace; Adopt pellet sintering technique, further intensified-sintered production; Continue to carry out transformation to old equipment to upgrade; Adhere to producing high basicity sinter; Make full use of the iron ore deposit of home and abroad; Adjust and improve SINTERING PRODUCTION layout; The Implement of sustainable development strategy, builds cleaning type factory.
Summary of the invention
The object of the present invention is to provide a kind of efficient many matrix powder sintering process, there is guarantee and realize the features such as product production is large, quality product is excellent, energy low consumption.
Technical scheme of the present invention is: a kind of efficient many matrix powder sintering process, comprises the following steps:
(1) preparation of sintered material: first get out iron ore concentrate, blast furnace dust, roll scale, slag, flux, fuel;
(2) prepare burden: then according to quality dosing method, namely press the quality batching of raw material, by electrical metering device, dissolve starting material by a certain percentage;
(3) mix: then add water-wet, mixing and pelletizing, different according to feedstock property, mixed once or secondary can be adopted to mix two kinds of flow processs;
(4) ignition control: the sintered material then on pallet, carries out charge level igniting through ignition furnace, sinters, and in force ventilated situation, make the fuel allocated in sintered material burn from top to bottom reach the object of sintering from charge level;
(5) process of agglomerate: finally crushing and screening is carried out to agglomerate, make agglomerate epigranular and the half-cooked material of remove portion, double deck screen selected by sieve, and wherein the conduct of below 6mm is returned mine and entered batching, 6-20mm is as grate-layer material, and more than 20mm enters blast furnace ore bin.
In a preferred embodiment of the present invention, described flux is acidic flux, neutral flux or basic flux.
In a preferred embodiment of the present invention, described dyestuff is coke powder and hard coal.
In a preferred embodiment of the present invention, described electrical metering device is made up of load carrier, LOAD CELLS, velocity sensor and weight display.
In a preferred embodiment of the present invention, described ignition furnace is blast furnace gas.
The efficient many matrix powder sintering process of one of the present invention, has guarantee and realizes the features such as product production is large, quality product is excellent, energy low consumption.
Accompanying drawing explanation
Accompanying drawing 1 is the schematic flow sheet of the present invention's efficient many matrix powder sintering process one preferred embodiment.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
Refer to Fig. 1, Fig. 1 is a kind of efficient many matrix powder sintering process of the present invention, comprises the following steps:
(1) preparation of sintered material: first get out iron ore concentrate, blast furnace dust, roll scale, slag, flux, fuel;
(2) prepare burden: then according to quality dosing method, namely press the quality batching of raw material, by electrical metering device, dissolve starting material by a certain percentage;
(3) mix: then add water-wet, mixing and pelletizing, different according to feedstock property, mixed once or secondary can be adopted to mix two kinds of flow processs;
(4) ignition control: the sintered material then on pallet, carries out charge level igniting through ignition furnace, sinters, and in force ventilated situation, make the fuel allocated in sintered material burn from top to bottom reach the object of sintering from charge level;
(5) process of agglomerate: finally crushing and screening is carried out to agglomerate, make agglomerate epigranular and the half-cooked material of remove portion, double deck screen selected by sieve, and wherein the conduct of below 6mm is returned mine and entered batching, 6-20mm is as grate-layer material, and more than 20mm enters blast furnace ore bin.
Further illustrate, described flux is acidic flux, neutral flux or basic flux, described dyestuff is coke powder and hard coal, and described electrical metering device is made up of load carrier, LOAD CELLS, velocity sensor and weight display, and described ignition furnace is blast furnace gas.
Further illustrating, raw materials for sintering be prepared as that iron-holder is higher, the breeze of granularity <5mm, iron ore concentrate, blast furnace dust, roll scale, slag etc.General requirement iron-bearing material is of high grade, stable components, and impurity is few.Require that effective CaO content is high in flux, impurity is few, stable components, and moisture about 3%, what granularity was less than 3mm accounts for more than 90%.In sintered material, add a certain amount of rhombspar, make agglomerate contain suitable MgO, have good effect to sintering process, the quality of agglomerate can be improved.Fuel is mainly coke powder and hard coal.Be that fixed carbon content is high to the requirement of fuel, ash content is low, and volatile matter is low, and sulfur-bearing is low, stable components, is moisturely less than 10%, and what granularity was less than 3mm accounts for more than 95%.Mixing object: the uniform composition making sintered material, moisture is suitable, is easy to pelletizing, thus obtains the good sinter mixture of size composition, to ensure the quality of agglomerate and to improve output.The method of mixing: add water-wet, mixing and pelletizing.Different according to feedstock property, mixed once or secondary can be adopted to mix two kinds of flow processs.The object of mixed once: wetting and mixing, also can make material preheating when adding hot returning ore.The object of secondary mixing: continue mixing, pelletizing, to improve permeability of sintering material bed.When sintering with the rich ore powder of granularity 10 ~ 2Omm, because its granularity has reached pelletizing needs, adopt mixed once, mixing time is about 50s.When using fine grinding fine ore sintering, because granularity is meticulous, bed permeability is poor, for improving blast furnace permeability, must in mixing process pelletizing, so adopt secondary to mix, mixing time is generally no less than 2.5 ~ 3min.Material on pallet, carries out charge level igniting through ignition furnace, sinters, and in force ventilated situation, make the fuel allocated in compound burn from top to bottom reach the object of sintering from charge level.Ignition furnace adopts blast furnace gas ignition, has saved the energy consumption of agglomerate, has reduced cost.Crushing and screening is carried out to agglomerate, makes agglomerate epigranular and the half-cooked material of remove portion, for blast-furnace smelting creates favorable conditions, double deck screen selected by sieve, wherein the conduct of below 6mm is returned mine and is entered batching, and 6-20mm is as grate-layer material, and more than 20mm enters blast furnace ore bin.The invention provides a kind of efficient many matrix powder sintering process, there is guarantee and realize the features such as product production is large, quality product is excellent, energy low consumption.
The specific embodiment of the present invention; but protection scope of the present invention is not limited thereto; any those of ordinary skill in the art are in the technical scope disclosed by the present invention, and the change can expected without creative work or replacement, all should be encompassed within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should limit with claims is as the criterion.
Claims (5)
1. efficient many matrix powder sintering process, is characterized in that: comprise the following steps:
The preparation of sintered material: first get out iron ore concentrate, blast furnace dust, roll scale, slag, flux, fuel;
Batching: then according to quality dosing method, namely presses the quality batching of raw material, by electrical metering device, dissolves starting material by a certain percentage;
Mixing: then add water-wet, mixing and pelletizing, different according to feedstock property, mixed once or secondary can be adopted to mix two kinds of flow processs;
Ignition control: the sintered material then on pallet, carries out charge level igniting through ignition furnace, sinters, and in force ventilated situation, make the fuel allocated in sintered material burn from top to bottom reach the object of sintering from charge level;
The process of agglomerate: finally carry out crushing and screening to agglomerate, make agglomerate epigranular and the half-cooked material of remove portion, double deck screen selected by sieve, and wherein the conduct of below 6mm is returned mine and entered batching, and 6-20mm is as grate-layer material, and more than 20mm enters blast furnace ore bin.
2. efficient many matrix powder sintering process according to claim 1, is characterized in that: described flux is acidic flux, neutral flux or basic flux.
3. efficient many matrix powder sintering process according to claim 1, is characterized in that: described dyestuff is coke powder and hard coal.
4. efficient many matrix powder sintering process according to claim 1, is characterized in that: described electrical metering device is made up of load carrier, LOAD CELLS, velocity sensor and weight display.
5. efficient many matrix powder sintering process according to claim 1, is characterized in that: described ignition furnace is blast furnace gas.
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| CN201510164682.4A CN104745808A (en) | 2015-04-09 | 2015-04-09 | Process for efficiently sintering multi-matrix powder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541072A (en) * | 2019-09-19 | 2019-12-06 | 昆明理工大学 | treatment method and treatment system for harmless utilization of hyper-enriched plants |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101177730A (en) * | 2007-11-30 | 2008-05-14 | 攀钢集团攀枝花钢铁研究院 | Method for preparing low-silicon superhigh-alkalinity sintered ore |
| CN103627895A (en) * | 2013-12-04 | 2014-03-12 | 四川金广实业（集团）股份有限公司 | Production method for sintering chromium powder ore by continuous strand sinter machine |
| CN104232884A (en) * | 2013-06-24 | 2014-12-24 | 凌敬平 | Agglomeration method of iron ore powder |
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2015
- 2015-04-09 CN CN201510164682.4A patent/CN104745808A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101177730A (en) * | 2007-11-30 | 2008-05-14 | 攀钢集团攀枝花钢铁研究院 | Method for preparing low-silicon superhigh-alkalinity sintered ore |
| CN104232884A (en) * | 2013-06-24 | 2014-12-24 | 凌敬平 | Agglomeration method of iron ore powder |
| CN103627895A (en) * | 2013-12-04 | 2014-03-12 | 四川金广实业（集团）股份有限公司 | Production method for sintering chromium powder ore by continuous strand sinter machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541072A (en) * | 2019-09-19 | 2019-12-06 | 昆明理工大学 | treatment method and treatment system for harmless utilization of hyper-enriched plants |
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Application publication date: 20150701 |