CN101280346B - Hot disintegration method for converter steel slag - Google Patents
Hot disintegration method for converter steel slag Download PDFInfo
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- CN101280346B CN101280346B CN2008101137627A CN200810113762A CN101280346B CN 101280346 B CN101280346 B CN 101280346B CN 2008101137627 A CN2008101137627 A CN 2008101137627A CN 200810113762 A CN200810113762 A CN 200810113762A CN 101280346 B CN101280346 B CN 101280346B
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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
- 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
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Abstract
The invention relates to the steel slag recovery and reclamation processing technology. The invention provides a disruption method of converter steel slag, which is characterized in that the steel slag is poured into a dross box in a hot slag splashing workshop under the temperature of 1050 to 1150 DEG C, little water is sprayed to reduce the temperature, after an isolation layer is formed, the slag is poured and water is sprayed continuously time and again, and then the broken steel slag is obtained after warming up stuffily. The steel slag processed through the method of the invention has the advantages of good graining effect and performance, and the method and the process are advanced, the investment on the system is low, the operating cost is low, and the economic effect is obvious.
Description
[technical field]
The present invention relates to metallurgical solid waste steel slag treatment technology, be specifically related to a kind of slag slag case hot disintegration method.
[background technology]
Metallurgical solid waste residue with iron and steel enterprise's discharging is a process object, and for example producing through the regeneration recovery, New Building Materials are the manufacturing recycling economy means of a kind of current industry.This slag good product performance, production cost is low, is well received.
The requirement of estimating the slag treatment technology is: the investment processing cost, and production safety, easy and simple to handle, environment protection, granulation effect.Wherein, environment protection and granulation effect come into one's own just day by day.The treatment process of contaminate environment, operating condition difference is not allowed to accept.The granulation that slag is handled is effective then further to be fully utilized, reduces steel-making cost and created condition for slag.
Utilizing slag to produce building material product all must be through technologies such as fragmentation, screening, magnetic separation, grindings.Because slag hardness is big, add iron content in the slag, difficulty of processing is big, the production cost height, for solving this difficult problem, existing several slag treatment plant adopts hot vexed slag technology, and its operation is that liquid steel slag is poured in the slag case, sprays a small amount of water coolant, and it is solid-state that slag is become.Pour slag case 1-2 jar slag at every turn into, put into special-purpose vexed slag case with shovel loader again, cover vexed slag lid, water spray is pulverized the slag be full of cracks, makes slag obtain refinement.But this method treating processes is long, and intermediate demand is transported operation together, builds two cover treatment systems, and system's floor space is big, system has high input, productive expense height, long processing period, long, the incompatible big needs of producing of pay off period.
Existing another kind of typical process is the vexed metallurgical steel slag treatment technology of pot type heat, adopts water distribution Technology and the automatic metal magnetic separation and the screening streamline of vexed jar of special-purpose heat and spray equipment, efflorescence slag.Above steel five factory's bessemer furnace slag production lines are example, 9,420,000 yuan of its gross investments, and wherein facility investment is 454.40 ten thousand yuan, main equipment life-span 5-8, systematic running cost is 7,740,000 yuan/year, pay off period is 5 years.
Chinese patent CN 2004100969810 discloses a kind of thermal air tight treatment method of hot state steel slag, and it may further comprise the steps: spraying-stop-spraying-clear up; Described spray step comprise temperature 300-800 ℃ slag put into hot vexed pond after, with water smoke slag was sprayed 3-7 hour, when temperature is 75-85 ℃, stop spray; The described step of clearing up comprises the slag after stopping to spray staticly with steady 3.5-4.5 hour, to being less than or equal to 65 ℃ and stop, obtains goods.
Chinese patent application CN 021571627 discloses a kind of steel slag hot disintegrating steam curing treatment process, and it comprises following steps in regular turn: (1) slag is preposition: liquid steel slag is cooled to below 800 ℃, makes this slag form bulk; (2) slag charging: the block slag that step (1) is finished dealing with is transported in the hot disintegrating device and broken frustillatum, and this hot disintegrating device has cell body, steam supply pipe, top cover and jetting member; (3) water inlet: utilize jetting member to continue to make slag be cleaved into little bulk once more, produce steam simultaneously to above-mentioned fritter shape slag water spray; (4) supply steam: supply steam enters hot disintegrating device, makes the slag granulation; (5) hot vexed stabilization: make certain heat energy of keeping setting in the vexed space of this heat, make the free calcium oxide in this slag be hydrolyzed into stabile calcium hydroxide rapidly; (6) slag tap: behind slag stabilization and pulverization, wait to naturally cool to below 70 ℃, the slag that disposes is taken out in this hot disintegrating device.
The common defects of prior art is the processing step more complicated, and the production cycle is longer, and slag must handle through cooling earlier, because the pit system is at the underground 8m that reaches deeply, and inconvenience maintenance and handle the exploitation of back slag.
[summary of the invention]
" technical problem that will solve "
The objective of the invention is to overcome the deficiencies in the prior art, the bessemer furnace slag that a kind for the treatment of processes is short, productive expense is low, with short production cycle breaking method is provided.
" technical scheme "
In order to achieve the above object, the invention provides a kind of bessemer furnace slag breaking method, it comprises the steps:
A) temperature 1250-1350 ℃ of bessemer furnace slag put into slag ladle;
B) slag that will naturally cool to 1050-1150 ℃ in described slag ladle is poured in the slag case;
C) make the slag in the described slag case become the deashing look by water spray, so form sealing coat on described slag surface by redness;
D) above-mentioned steps B) and step C) repeat 30-50 time;
E) vexed slag cover is covered on the described slag case, continue water spray and make the slag cooling, generation steam carried out hot vexed 40-50 hour, reached like this to make the slag be full of cracks broken.
According to a kind of preferred embodiment of aforesaid method, wherein step e) injection flow rate be in slag weight 10-20%.
According to above-mentioned bessemer furnace slag breaking method, the slag of its be full of cracks particle diameter 0-10mm is in slag weight 65-75 weight %.
The F-CaO content that adopts the slag that the inventive method obtains is 3 weight % or below the 3 weight %.
According to a kind of preferred embodiment of aforesaid method, step B) to step e) all in the slag case, carry out.
Preferably, step B) and step C) repeat 35-40 time.
In the method for the invention; described slag case is a kind of pulverizing converter slag equipment made from reinforced concrete, the protecting sheet that described slag chamber interior wall has the 30mm steel plate to make, and the concrete spacing of described protecting sheet and reinforced concrete is 100-150mm; to form thermofin, can protect reinforcing bar.Protecting sheet distortion may occur after using 1-2, and can change protecting sheet this moment, to improve the result of use and the life-span of slag case.
The difference of the slag case that aforesaid method is used and the slag case of prior art is that pre-cooled and vexed slag once finishes in the slag case, be that whole bessemer furnace slag shattering process is all finished in the slag case, the bessemer furnace slag of coming out of the stove naturally cools to 1050-1150 ℃ in described slag case, carry out sultry break process then.
Be provided with an open drain in slag case bottom, there are reinforcing bar lattice canopy and filter screen in inboard, described open drain, its open drain one end links to each other with settling tank, be sprayed onto the superfluous water of slag, flow to sedimentation and filtration ditch through the open drain, clear water after the filtration flows to clean water basin, and its open drain the other end links to each other with clean water basin, pumps the clear water recycle by submersible sewage pump.Termination, both sides, open drain adopts the open drain of plate with cover to dam.The open drain is used to collect the waste water on pervious course and ground.Preferably, the wide 0.8m in open drain, dark 1m, cover plate adopts 50mm Plate Steel double-edged fine-toothed comb, and cover plate is indeformable when guaranteeing to travel on it heavy vehicle.
The employed vexed slag cover of the inventive method is welded with steel plate, and its size and slag case are complementary, and highly are 600-800mm.
According to the present invention, described is that the slag case is to be connected with the leakage slag bath, is welded with the vertical gusset of well formula lattice on the described leakage slag bath, and is provided with three row's nozzles.
" beneficial effect "
Acid-washing waste acid reproduction method of the present invention has the following advantages:
1, granulation is effective: the slag of handling through this method, and wherein particle diameter is that the slag of 0-10mm accounts for slag total amount 65-75 weight %;
2, slag superior performance: the slag steel separates thoroughly, and it is about 25% to reduce the broken apart production cost of next procedure, and F-CaO content drops to 3%, helps being processed into the stable performance behind the product;
3, technology advanced person: because this method (comprising that slag cooling and heat are vexed) can be finished processing in same set of slag case, reduced middle-chain and treatment time, reduced the process for producing cost; And the contrast prior art finds that technical scheme of the present invention need not be lowered the temperature in advance to slag, can directly handle high temperature slag (more than 1000 ℃), has simplified technology in implementation process;
4, system's less investment, floor space are little: have the hot application workshop of 8 slag casees can satisfy the processing of 6,000,000 tons of slags that discharge of year output of steel, take up an area of 4860m between hot application
2, more than 2,000 ten thousand yuan of gross investments (containing two 75 tons of drivings);
5, low, the obvious economic of working cost: the average treatment expense of steel discharging slag per ton by statistics is 4 yuan, and a year treatment capacity reaches 4,000,000 tons of slags that steel discharged, and reduces production costs about 2,400,000 yuan every year;
6, environmentally friendly: as, to have reduced pollution to environment owing to reduced the transhipment of an an ancient unit of weight equal to 20 or 24 *taels of silver slag.
7, because vexed slag system, has solved the maintenance of slag case system and the exploitation work of processing back slag on ground.
[embodiment]
Following embodiment illustrates bessemer furnace slag breaking method of the present invention in conjunction with the accompanying drawings without limitation.Those skilled in the art; under the situation that does not break away from the spirit and scope of the present invention; can also make variations and modifications to the present invention, but all equivalent technical schemes all belong to category of the present invention, protection domain of the present invention is limited by the application's claims.
Being used to handle the production line of producing 6000000 tons of slags that steel is discharged per year with one is example, and the slag case of built-in long 18m, wide 12m, high 3m is totally 8 between the hot application slag car of long 180m, wide 27m.Three barricades of slag case are that backplate protects the reinforced concrete barricade with the Cast Steel Plate, and the bottom is lined with the dry bottom slag.Slag case bottom is provided with the open type open drain of a wide 0.8m, dark 1m, is used to collect the waste water on pervious course and ground.50mm Plate Steel double-edged fine-toothed comb cover plate is arranged on the open drain.One end in open drain is connected to settling tank, and the other end does not reach the puddle, like this, can the water in the puddle be pumped to settling tank by submersible sewage pump, through the post precipitation recycle.
Pour the hot slag (about 1300 ℃ of temperature) of steel mill's steel-making discharging into 16m
3Slag ladle in, be filled to 80% of slag ladle capacity.With flat-bed trailer slag ladle is transported to slag and handle between the vexed slag car of hot application of field, slag ladle is sling, directly equably slag is sprinkled in the slag case by 75 tons of remote control bridge cranes.Because transportation, slag is cooled to about 1100 ℃ naturally.
The hand control valve of opening water coolant is to the slag surface sprinkling, and injection flow rate becomes the deashing look to guaranteeing red slag cooling.It should be noted that must not have ponding in the slag case in this process, in case blow out accident.
After the operate continuously (deslagging, water spray) 40 times, the vexed slag cover that will be of a size of 18m * 12m, high 800mm covers on the slag case.
Build, lock vexed slag cover after, open the water spray system on the cover, the hot slag water spray in the slag case, injection flow rate is 20% of a hot slag gross weight.Owing to water spray produces a large amount of water vapors, it is vexed promptly the hot slag in the slag case to be carried out heat, and the superfluous water steam that hot vexed process produces is by the flue discharge through between hot application of the exhaust passage on the vexed cover.And unnecessary water is discharged by the open drain in the hot vexed process, can recycle after precipitation, processing, plays environment protection significance.
The broken slag that heat is obtained after vexed 48 hours, wherein particle diameter is that the slag of 0-10mm accounts for slag total amount 65-75 weight %, and F-CaO content is 3%.
Claims (9)
1. a bessemer furnace slag breaking method is characterized in that this method comprises the steps:
A) temperature 1250-1350 ℃ of bessemer furnace slag put into slag ladle;
B) slag that will naturally cool to 1050-1150 ℃ in described slag ladle is poured in the slag case;
C) make the slag in the described slag case become the deashing look by water spray, so form sealing coat on described slag surface by redness;
D) above-mentioned steps B) and step C) repeat 30-50 time;
E) vexed slag cover is covered on the described slag case, continue water spray and make the slag cooling, generation steam carried out hot vexed 40-50 hour, reached like this to make the slag be full of cracks broken.
2. method according to claim 1 is characterized in that step e) injection flow rate be in total slag weight 10-20%.
3. method according to claim 1, the slag of the particle diameter 0-10mm that it is characterized in that chapping is in slag weight 65-75 weight %.
4. method according to claim 1, the F-CaO content that it is characterized in that broken slag are 3 weight % or below the 3 weight %.
5. method according to claim 1 is characterized in that step B) and step C) repeat 35-40 time.
6. method according to claim 1 is characterized in that described slag case makes with reinforced concrete, and described slag chamber interior wall is lined with the protecting sheet made from the 30mm steel plate, and the concrete spacing of described protecting sheet and reinforced concrete is 100-150mm, to form thermofin.
7. method according to claim 1 is characterized in that described slag case bottom periphery is provided with the open drain, and there are reinforcing bar lattice canopy and filter screen in inboard, described open drain, and its open drain one end links to each other with settling tank, and the other end links to each other with clean water basin.
8. method according to claim 1 is characterized in that described vexed slag cover is welded with steel plate, and it highly is 600-800mm.
9. method according to claim 1 is characterized in that described slag case is connected with the leakage slag bath, is welded with the vertical gusset of well formula lattice on the described leakage slag bath, and is provided with three row's nozzles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101137627A CN101280346B (en) | 2008-05-30 | 2008-05-30 | Hot disintegration method for converter steel slag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101137627A CN101280346B (en) | 2008-05-30 | 2008-05-30 | Hot disintegration method for converter steel slag |
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| CN101280346A CN101280346A (en) | 2008-10-08 |
| CN101280346B true CN101280346B (en) | 2010-06-02 |
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| CN2008101137627A Expired - Fee Related CN101280346B (en) | 2008-05-30 | 2008-05-30 | Hot disintegration method for converter steel slag |
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| CN102071270B (en) * | 2010-12-20 | 2012-07-18 | 山西太钢不锈钢股份有限公司 | Method for setting total water amount of thermal process of steel slag strip ladle |
| CN102690905A (en) * | 2011-03-21 | 2012-09-26 | 鞍山钢铁集团公司 | Short-process slag stewing water returning technology |
| CN102417938A (en) * | 2011-11-17 | 2012-04-18 | 中冶华天工程技术有限公司 | Processing device for steel slag hot splashing |
| CN103540697B (en) * | 2012-07-16 | 2015-02-25 | 北京明诚技术开发有限公司 | Slag treating system |
| CN103937915B (en) * | 2014-04-10 | 2015-09-16 | 攀钢集团西昌钢钒有限公司 | A kind for the treatment of process of converter slag |
| CN104152607A (en) * | 2014-08-29 | 2014-11-19 | 攀枝花钢城集团有限公司 | Method for pulverizing converter steel slag in hot-stuffy mode |
| CN105624345B (en) * | 2015-12-30 | 2017-08-22 | 宝钢集团新疆八一钢铁有限公司 | A kind of method for realizing that liquid steel slag High Efficiency Thermal is vexed |
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| CN109057102A (en) * | 2018-09-20 | 2018-12-21 | 中国二十二冶集团有限公司 | The installation method of slag processing wall protection board |
| CN111530592B (en) * | 2020-05-09 | 2021-05-04 | 马鞍山市鑫火科技有限公司 | Recycling processing technology for converter steel slag |
| CN112301176B (en) * | 2020-10-12 | 2021-07-27 | 福建鼎盛钢铁有限公司 | Smelting steel slag waste heat energy recycling method |
| CN115138665A (en) * | 2022-08-08 | 2022-10-04 | 四川实美科技有限公司 | Waste residue recycling method for non-ferrous metal smelting |
| CN116217101A (en) * | 2022-12-08 | 2023-06-06 | 安徽马钢嘉华新型建材有限公司 | Steel slag treating agent and steel slag recycling method |
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