CN1095761A - Method and device that mud produced by wet dust removal of converter is recycled - Google Patents
Method and device that mud produced by wet dust removal of converter is recycled Download PDFInfo
- Publication number
- CN1095761A CN1095761A CN 93105875 CN93105875A CN1095761A CN 1095761 A CN1095761 A CN 1095761A CN 93105875 CN93105875 CN 93105875 CN 93105875 A CN93105875 A CN 93105875A CN 1095761 A CN1095761 A CN 1095761A
- Authority
- CN
- China
- Prior art keywords
- mud
- converter
- dust removal
- stirring area
- wet dust
- 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
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000000428 dust Substances 0.000 title claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 13
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 11
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 11
- 239000004571 lime Substances 0.000 claims abstract description 11
- 230000029087 digestion Effects 0.000 claims abstract description 9
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 18
- 235000012255 calcium oxide Nutrition 0.000 claims description 11
- 239000000292 calcium oxide Substances 0.000 claims description 11
- 239000011575 calcium Substances 0.000 claims description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 7
- 229910052791 calcium Inorganic materials 0.000 claims description 7
- 238000004064 recycling Methods 0.000 claims description 4
- 238000007790 scraping Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 20
- 229910052742 iron Inorganic materials 0.000 abstract description 10
- 150000001875 compounds Chemical class 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 238000005245 sintering Methods 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000009628 steelmaking Methods 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 abstract description 2
- 235000012054 meals Nutrition 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000006062 fragmentation reaction Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000010802 sludge Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000013467 fragmentation Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004523 agglutinating effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to method and device that mud produced by wet dust removal of converter is recycled, with the continuously even blending device dosing of mud produced by wet dust removal of converter warp, simultaneously, in proportion with addition of containing CaO lime powder, carry out broken mixing, again through digestion, making it produce meal loose, no airborne dust uses for sintering, steel-making as the auxiliary material of Iron and Steel Production, solved in the prior art moisture 20～40% dedusting mud directly allocated into as iron-bearing material and occurred the batch mixing inequality in the iron making and sintering compound, on relevant facility, the problem of difficult cleaning.
Description
The present invention relates to method and device that mud produced by wet dust removal of converter is recycled.
One ton of converter steel of the every production of smelter produces 30～50 kilograms of flue dust approximately, adopts wet processing, and dust deposition can obtain moisture 20～40% dirt mud through the pressure filter dehydration, wherein is rich in metallic elements such as iron, calcium, is Steel Plant's renewable resource preferably.At present, though adopted as made the method for multiple recyclings such as ball, oven dry, briquetting, but, use existing apparatus such as vibrations feed, screw feeder, material grasping, chapelet, all because reasons such as fluffy material, bonding can not realize continuous even feeding because of its fine size, viscosity are big; Use biaxial rneader, concrete mixer, Chinese patent medicine kneading machine and existing fragmentation, stirring, when mixing machinery is used for dirt mud and lime powder mixing, all because of dirt mud viscosity, hardness cause greatly the stirrer appearance do not change or throw switch, phenomenon such as key position quick abrasion.For these reasons, cause present many Steel Plant dirt mud all have to be abandoned outward.The steel mill that produces 2000000 tons of steel per year produces about 100,000 tons of dirt mud, topples over dirt mud sapce charge and just reaches 100,000 yuan, not only wastes resource, and contaminate environment, seriously hinders the raising of output of steel.China's patent 89105349.2 discloses a kind of water law of method-dedusting steel-smelting converter soil mud of dirt mud recycling and has recycled.Through operations such as sedimentation and filtrations, converter dust-removing sludge moisture 40～70% is as sintered material water, the direct method in the iron ore powder sintering compound in cylindrical mixer in compounding process, eliminated in the prior art batch mixing inequality has been appearred in moisture moisture converter dust-removing sludge 20～40% is directly allocated into as iron-bearing material in the iron making and sintering compound, on relevant facility, difficult cleaning, maintenance worsen drawbacks such as sintering technology and economic indicator.But, this method because of its directly with mud with addition of to barrel feeder, adopt the long-distance pipe transportation, can bring a series of problems such as pipe wear, mud deposition, transportation is difficulty relatively.In addition, the dirt mud in cylindrical mixer is big because of its water content, should not use steam heating, and what directly influence sinter mixture makes ball, ventilation property, even can influence the quality of agglomerate, and this method can not be handled moisture 20～40% mud.Therefore, it is simple to invent a kind of technology, the reliable dirt mud recycling of equipment technology, and making it turns waste into wealth, and is that Steel Plant expect the problem that solves for a long time.
The purpose of this invention is to provide a kind of Iron and Steel Production auxiliary material that the easy agglutinating that produces after the converter wet dedusting, the dirt mud processing that is difficult to use are become loose, no airborne dust, are convenient to process, can be used as the method and the device of the powder of sintered material or converter synthetic slag etc., realize the comprehensive utilization of dirt mud.
For achieving the above object, the invention provides the method that a kind of mud produced by wet dust removal of converter is handled, it is characterized in that: the mud produced by wet dust removal of converter with moisture 20～40% is quantitatively given mud through continuous even feeding district, again in dried mud weigh 1: 0.3～0.7 ratio allocates calcium lime powder into, feeding stirring area mixing is through digester digestion the becoming Iron and Steel Production powdery auxiliary material that is rich in iron, calcium.
For achieving the above object, the invention provides a kind of continuously even blending device that mud produced by wet dust removal of converter is handled that is used for, form by continuous even feeding district and stirring area, the even feeding district is by the dirt hopper dredger continuously, the scraper plate machine is formed, stirring area is by the spiral feed zone, reduction stage and discharge zone are formed, it is characterized in that: the dirt hopper dredger to be shaped as aclinal rectilinear, directly be located at the bottom of the storehouse on the casing of sliding ways of scraper plate machine, the scraper plate that moves evenly is sent to dirt mud and carries out broken mixing in the stirring area, and the reduction stage of stirring area vertical interlaced on transverse axis is installed with several broken rods.
The present invention has the following stated advantage:
1, mud produced by wet dust removal of converter is simple with addition of the digestion process equipment of unslaked lime powder, the digestion material granularity of output, moisture content etc. can both satisfy the processing requirement of sintered material or steelmaking ingredient, the batch mixing inequality that when the converter dust-removing sludge of handling moisture 20～40%, occurs in the prior art, the easy relevant devices that bonds have been eliminated, cause equipment to be difficult to safeguard, drawback such as loss is big.
2, continuously evenly blending device adopt the rectilinear dirt hopper dredger of aclinal, with the scraper plate machine open a position the end, can to satisfy blanking even, overcome fluffy material phenomenon, realize mud constant volume feed, the mud cake of discharging evenly, continuously, and adopt staggered broken excellent, in broken clod, can also realize the thorough mixing of unslaked lime powder and mud, the digestion material of output does not have caking.
3, utilize the unslaked lime powder to handle mud, save the energy, can reach the dual purpose of the screen underflow of unslaked lime in comprehensive utilization mud produced by wet dust removal of converter and steelmaking process and other technological process, economical rationality realizes benign cycle, obvious social benefit.
The present invention is further detailed explanation below in conjunction with accompanying drawing:
Fig. 1 is the process flow sheet that mud produced by wet dust removal of converter is handled;
Fig. 2 is continuously even blending device.
Fig. 1 shows the technological process of the inventive method. The dedusting mud that comes from pneumatic steelmaking factory dewaters through filter press, obtain moisture 20～40% mud cake, it is sent into continuous uniform feed zone 17, send into then stirring area 18, and weigh 1: 0.3～calcium lime powder of 0.7 ratio by pipeline 10 to wherein adding in dried mud, under well-beaten condition, the dirt mud that mixes with lime is particle diameter less than 20 millimeters graininess, along with the carrying out of lime slaking reaction, CaO+H takes place in the CaO in the quick lime and the water effect in the mud2O＝Ca（OH）
2Exothermic reaction, one The aspect raises mixture temperature, evaporates the most of moisture content in the mud, on the other hand, because reaction causes volumetric expansion, makes the compound spalling broken and form granular material loose, no airborne dust. The addition of control lime can be controlled the moisture content of digestion material and granularity to satisfy sintering or process for making requirement.
Continuous uniform mixing device shown in Figure 2 is made up of continuous uniform feed zone and stirring area two parts, the continuous uniform feed zone is made up of dirt hopper dredger 1, scrapper conveyor 2, scrapper conveyor 2 can be conventional scratch board conveyor, dirt hopper dredger 1 to be shaped as aclinal rectilinear, directly be located at the bottom of the storehouse on the casing of sliding way 8 of scrapper conveyor 2. Stirring area is made up of charging aperture 11, spiral feed zone 12, reduction stage 13, discharge zone 14, motor 16, some broken rods 15 have been installed on the trunnion axis of reduction stage 13 vertical interlaced, compound is discharged at the reduction stage 13 interior discharge zones 14 that enter behind excellent 15 fragmentations of fragmentation, stirring, mixing, finishes continuous uniform batch mixing process.
The present invention is further illustrated below in conjunction with embodiment:
Mud produced by wet dust removal of converter is after the pressure filter dehydration, and the dirt hopper dredger 1 of packing into because dirt hopper dredger 1 adopts aclinal rectilinear, reduces the holder power of bulkhead to slippage under the mud, prevents that mud from fluffy material taking place in the storehouse.Along with starting of scraper plate machine 2, drive the scraper plate 3 equidistantly be installed on the chain belt 5 and move, with the mud in the dirt hopper dredger 1 scrape deliver from godown outside, scraper plate machine 2 can be realized mud constant volume feed, the mud cake of discharge evenly, continuously.17 mud of discharging are sent into the opening for feed 11 of stirring area 18 through pipeline 9 from continuous even feeding district, and by pipeline 10 to opening for feed 11 in dried mud weight: 1: 0.3～0.7 ratio evenly adds calcium lime powder.The compound of mud and calcium lime powder advances reduction stage 13 from spiral feed zone 12, the spiral feed zone 12 that opening for feed 11 enters stirring area with compound, vertical interlaced has been installed some broken rods 15 with installing on the transverse axis of reduction stage 13, compound enters discharge zone 14 and discharges behind excellent 15 fragmentations of fragmentation, stirring, mixing in reduction stage 13, be transported to digester.In digester 19, CaO+H takes place in CaO continuation in the unslaked lime and the water effect in the mud
2O=Ca(OH)
2Thermopositive reaction, mixture temperature is raise, evaporate the most of moisture content in the mud, on the other hand, because reaction causes volumetric expansion, make pug broken and form powdery sludge digestion material, the add-on of control lime can be controlled the moisture content of digestion material and granularity to satisfy the sintering process requirement.
According to the present invention, can also handle smelter wet dedusting mud such as gas mud, blast furnace dedusting mud, thereby solve insoluble for a long time environmental protection and resource reutilization problem.
Certainly, the embodiment that the present invention can not only limit to provide above, but can in the protection domain of claims definition, implement in many ways.
Claims (2)
1, a kind of method of mud produced by wet dust removal of converter recycling, it is characterized in that: quantitatively be transported to stirring area in through continuous even feeding district the dirt mud of moisture 20-40%, adding calcium lime powder simultaneously stirs, the unslaked lime consumption is 0.3-0.7 a times of dried dirt mud, material behind the mixing generates loose powder through digestion.
2, a kind of continuously even blending device of realizing the method for claim 1, form by continuous even feeding district and stirring area, it is characterized in that: continuously the feed bin (1) in even feeding district to be shaped as aclinal rectilinear, it at the bottom of the storehouse movable scraping plate machine (2), to realize that dirt mud evenly is delivered in the stirring area, several broken rods (15) are housed on the transverse axis of the reduction stage of stirring area (13) vertical interlaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93105875 CN1032869C (en) | 1993-05-28 | 1993-05-28 | Method and unit for utilizing and recovering mud produced by wet dust removal of converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93105875 CN1032869C (en) | 1993-05-28 | 1993-05-28 | Method and unit for utilizing and recovering mud produced by wet dust removal of converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1095761A true CN1095761A (en) | 1994-11-30 |
| CN1032869C CN1032869C (en) | 1996-09-25 |
Family
ID=4985956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93105875 Expired - Fee Related CN1032869C (en) | 1993-05-28 | 1993-05-28 | Method and unit for utilizing and recovering mud produced by wet dust removal of converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1032869C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083892C (en) * | 1999-11-29 | 2002-05-01 | 首钢总公司 | Method for producing slag forming agent for steelmaking using convertor sludge as raw material |
| CN100419100C (en) * | 2004-10-05 | 2008-09-17 | 保尔伍斯股份有限公司 | Treatment of Dust and Sludge in Iron and Steel Works in Multi-hearth Furnace |
| CN100429165C (en) * | 2005-04-06 | 2008-10-29 | 西安建筑科技大学 | Recycling and drying treatment method of steelmaking converter sludge |
| CN102030450A (en) * | 2010-09-30 | 2011-04-27 | 首钢总公司 | Method for utilizing municipal sludge as raw material of steel industrial sintering ore |
| CN103387346A (en) * | 2013-08-16 | 2013-11-13 | 重庆钢铁(集团)有限责任公司 | Method for digesting quicklime by adopting steel-making and steel-rolling sludge in sintering process step |
| CN114182091A (en) * | 2021-12-10 | 2022-03-15 | 吉林恒联精密铸造科技有限公司 | A method for cold pressing and forming of iron-containing solid waste in steelmaking |
-
1993
- 1993-05-28 CN CN 93105875 patent/CN1032869C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083892C (en) * | 1999-11-29 | 2002-05-01 | 首钢总公司 | Method for producing slag forming agent for steelmaking using convertor sludge as raw material |
| CN100419100C (en) * | 2004-10-05 | 2008-09-17 | 保尔伍斯股份有限公司 | Treatment of Dust and Sludge in Iron and Steel Works in Multi-hearth Furnace |
| CN100429165C (en) * | 2005-04-06 | 2008-10-29 | 西安建筑科技大学 | Recycling and drying treatment method of steelmaking converter sludge |
| CN102030450A (en) * | 2010-09-30 | 2011-04-27 | 首钢总公司 | Method for utilizing municipal sludge as raw material of steel industrial sintering ore |
| CN103387346A (en) * | 2013-08-16 | 2013-11-13 | 重庆钢铁(集团)有限责任公司 | Method for digesting quicklime by adopting steel-making and steel-rolling sludge in sintering process step |
| CN103387346B (en) * | 2013-08-16 | 2015-01-07 | 重庆钢铁(集团)有限责任公司 | Method for digesting quicklime with steelmaking and rolling sludge in sintering process |
| CN114182091A (en) * | 2021-12-10 | 2022-03-15 | 吉林恒联精密铸造科技有限公司 | A method for cold pressing and forming of iron-containing solid waste in steelmaking |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1032869C (en) | 1996-09-25 |
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| 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 | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090313 Address after: Shijingshan District Shougang Group, Beijing: 100041 Co-patentee after: Beijing Shougang Huaxia Engineering Technology Co., Ltd. Patentee after: Shougang Address before: Shijingshan District Shougang Group, Beijing: 100041 Patentee before: Capital Iron & Steel General Company |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 19960925 Termination date: 20110528 |