CN102605114A - Slag flushing process and system for ironmaking - Google Patents
Slag flushing process and system for ironmaking Download PDFInfo
- Publication number
- CN102605114A CN102605114A CN2011104081201A CN201110408120A CN102605114A CN 102605114 A CN102605114 A CN 102605114A CN 2011104081201 A CN2011104081201 A CN 2011104081201A CN 201110408120 A CN201110408120 A CN 201110408120A CN 102605114 A CN102605114 A CN 102605114A
- Authority
- CN
- China
- Prior art keywords
- water
- slag
- grain slag
- flushing cinder
- ironmaking
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- 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.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/032—Separating slag from liquid, e.g. from water, after quenching
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
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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
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention discloses a slag flushing process for ironmaking, and the process comprises the following steps: reacting water granulated slag with a polymeric flocculant to obtain larger water granulated slag; and performing slag-water separation on the larger water granulated slag to obtain filtered water slag and water which is filtered out. The invention also discloses a slag flushing system for ironmaking. According to the slag flushing process and system for ironmaking provided by the invention, the water slag passes through a zigzag-shaped sedimentation basin after the polymeric flocculant is cast into a slag runner, suspended matters out of water are less than 10mg/L, the scale formation possibility of equipment, such as a water pump, a valve and a drum screen, is low, the system cost is reduced, and waste heat can be recycled for power generation.
Description
Technical field
The invention belongs to the blast furnace slag processing technology field, specifically is a kind of ironmaking flushing cinder technology and system.
Background technology
At present; Handle iron-smelting blast-furnace slag and generally adopt Indian-Pakistani method: get into the slag pelletizer from the effusive blast furnace slag of slag runner, the high velocity jet of being jetted by pelletizer becomes grain slag with slag water quenching, sends into the further refinement again of grain slag bucket through water slag groove; Enter atmosphere from chimney in a large number here; Grain slag flows into drum filter equably through the grain slag divider, and slag-water slurry carries out pulp water at drum filter to be separated, and filters clean grain slag and is seen off by conveyor; The water that leaches is gone up the cooling tower cooling behind horizontal sedimentation tank, recycle at last.In this technology, it is big that the grain slag bucket is invested higher occupation of land, and horizontal sedimentation tank takes up an area of big, recirculated water suspended substance higher (200-500mg/l), and water pump, valve, rotary drum filter screen are prone to fouling, and waste heat can not reclaim.
Summary of the invention
The objective of the invention is to, it is big to overcome in the existing ironmaking flushing cinder process facility investment, and the unrenewable problem of circulation suspension object height and waste heat provides a kind of ironmaking flushing cinder technology and system.
According to an aspect of the present invention, provide a kind of ironmaking flushing cinder technology to comprise:
Grain slag and polymeric flocculant reaction are obtained bigger grain slag;
Said bigger grain slag is carried out pulp water separate the water that obtains the clean grain slag of filter and leach.
Further, a kind of ironmaking flushing cinder technology also comprises:
The water that leaches after said pulp water the separated flushing cinder that circulates.
Further, saidly the reaction of grain slag and polymeric flocculant obtained bigger grain slag be:
The dosage of said liquid polymeric flocculant is 0.1-3mg/l, comprises negatively charged ion, nonionic, cation polymeric flocculant.
Further, saidly said bigger grain slag is carried out pulp water separate to obtain the clean grain slag of filter and comprise with the water that leaches:
Said bigger grain slag is separated the back through grain slag distribution, buffering and pulp water to be obtained the clean grain slag of filter and filters clean water;
The grain slag that said filter is clean is seen off by conveyor.
Further, the said water that leaches after said pulp water the is separated flushing cinder that circulates comprises:
The water that leaches after the said pulp water separation is precipitated;
The sedimentary water of said process is obtained flushing cinder water after suction, lifting and heat exchange;
With the said flushing cinder water flushing cinder that circulates;
The waste heat that reclaims during with said heat exchange generates electricity.
Further, when said suction, also, prevent the generation of lime carbonate and other incrustation scales to adding Scale inhibitors through in the sedimentary water.
According to another aspect of the present invention, provide a kind of ironmaking flushing cinder to comprise:
First device and second device;
Said first device is used for grain slag through obtaining big grain slag with the polymeric flocculant reaction;
Said second device is used for that said big grain slag is carried out pulp water and separates clean grain slag of back acquisition filter and the water that leaches.
Further, a kind of ironmaking flushing cinder system also comprises:
Deflector type settling tank and the 3rd device;
Said deflector type settling tank is used for precipitating through the water that leaches after the pulp water separation said;
Said the 3rd device is used for said water through post precipitation is formed flushing cinder water and delivers to said first device flushing cinder that circulates through handling.
Further, said first device comprises slag pelletizer and water slag groove;
Said second device comprises grain slag divider, dashpot and the strainer of transferring shares;
Said slag pelletizer is used for becoming grain slag to be sent to water slag groove slag water quenching;
Said water slag groove is used for the liquid polymeric flocculant is added after the slag runner place obtains bigger grain slag, more said bigger grain slag is sent to the grain slag divider;
Said grain slag divider is used for that bigger grain slag is carried out grain slag and distributes;
Said dashpot is used for the buffering of the grain slag after distributing is flowed into the strainer of transferring shares;
The said strainer of transferring shares is used for that the grain slag that buffering flows into is carried out pulp water and separates clean grain slag of acquisition filter and the water that leaches.
Further, said the 3rd device comprises:
Water circulating pump suction well, flushing cinder water circulating pump, interchanger and waste-heat recovery device;
Said water circulating pump suction well is used for flowing to the flushing cinder water circulating pump again with behind the water suction water circulating pump suction well through post precipitation;
Said flushing cinder water circulating pump is used for the water that flows into is promoted to interchanger;
After said interchanger is used for the water that promotes carried out heat exchange and obtain flushing cinder water, flow to the slag pelletizer flushing cinder that circulates again;
The waste heat that said waste-heat recovery device reclaims when being used for said heat exchange generates electricity.
A kind of ironmaking flushing cinder technology provided by the invention and system are after water slag groove adds polymeric flocculant, through folding shape settling tank; Water outlet (suspended substance is less than 10mg/l) water quality is good; Cancelled grain slag bucket in traditional blast furnace slag processing, folding shape settling tank takes up an area of little, and equipment such as water pump, valve, rotary drum filter screen are less scaling; Greatly reduce system cost, waste heat energy reclaims generating.
Description of drawings
A kind of ironmaking flushing cinder process flow diagram that Fig. 1 provides for the embodiment of the invention;
Embodiment
As shown in Figure 1, a kind of ironmaking flushing cinder technology that the embodiment of the invention provides comprises:
Step 1: blast furnace slag flows into the shrend of slag particle device from iron-smelting blast furnace slag ditch and becomes grain slag.
Step 2: grain slag and polymeric flocculant reaction are obtained bigger grain slag.Grain slag is after the slag pelletizer flows into water slag groove; Herringbone junction slag runner place at said water slag groove adds the liquid polymeric flocculant; Lean on grain slag in the turbulent flow completion grain slag of water slag groove and the reaction of polymeric flocculant, tiny spun glass shape suspended substance is become bigger grain slag.The dosage of liquid polymeric flocculant is 0.1-3mg/l, comprises negatively charged ion, nonionic, cation polymeric flocculant.
Step 3: grain slag that will be bigger carries out pulp water and separates the water that obtains the clean grain slag of filter and leach.Bigger grain slag flows to (flow velocity 8t/min) grain slag divider by gravity, and grain slag that will be bigger carries out the grain slag distribution, dashpot cushions and drum filter carries out the clean grain slag of pulp water separation back acquisition filter and filters clean water through the grain slag divider.The grain slag that said filter is clean is seen off by conveyor.
Step 4: the water that leaches after pulp water the separated flushing cinder that circulates.The water that leaches after the pulp water separation is precipitated through the deflector type settling tank.To pass through sedimentary water passes through to obtain flushing cinder water after the suction of water circulating pump suction well, the lifting of flushing cinder water circulating pump and the interchanger heat exchange.Flushing cinder circulates behind flushing cinder water cycle to the slag pelletizer.Through the interchanger heat exchange time, the waste heat that reclaims is generated electricity.When suction, also, prevent the generation of lime carbonate and other incrustation scales to adding Scale inhibitors through in the sedimentary water.
A kind of ironmaking slag flushing device that the embodiment of the invention provides comprises:
First device, 1, second device 2, conveyor, deflector type settling tank and the 3rd device 3.
Wherein, first device 1 comprises slag pelletizer and water slag groove, is used for grain slag through obtaining big grain slag with the polymeric flocculant reaction.Second device 2 comprises grain slag divider, dashpot and the strainer of transferring shares, and is used for said big grain slag is carried out obtaining clean grain slag of filter and the water that leaches after pulp water separates.
The slag pelletizer is used for becoming grain slag to be sent to water slag groove slag water quenching; Water slag groove is used for the liquid polymeric flocculant is added after herringbone junction slag runner place obtains bigger grain slag, more said bigger grain slag is sent to the grain slag divider; The grain slag divider is used for that bigger grain slag is carried out grain slag and distributes; Dashpot is used for the buffering of the grain slag after distributing is flowed into the strainer of transferring shares; The strainer of transferring shares is used for that the grain slag that buffering flows into is carried out pulp water and separates clean grain slag of acquisition filter and the water that leaches.
Conveyor is used for that said process is removed the clean grain slag of slag system filter and is sent to finished bin.
The deflector type settling tank is used for precipitating through the water that leaches after the pulp water separation said.
The 3rd device 3 comprises water circulating pump suction well, flushing cinder water circulating pump, interchanger and waste-heat recovery device, is used for said water through post precipitation is formed flushing cinder water and delivers to the said 1 first device flushing cinder that circulates through handling.The water circulating pump suction well is used for flowing to the flushing cinder water circulating pump again with behind the water suction water circulating pump suction well through post precipitation; The flushing cinder water circulating pump is used for the water that flows into is promoted to interchanger; After interchanger is used for the water that promotes carried out obtaining flushing cinder water after the heat exchange, flow to the slag pelletizer flushing cinder that circulates again; The waste heat that waste-heat recovery device reclaims when being used for said heat exchange generates electricity.
Of the present inventionly be a little:
(1) after water slag groove adds polymeric flocculant, through folding shape settling tank, water outlet (suspended substance is less than 10mg/l) water quality is good; Cancelled grain slag bucket in traditional blast furnace slag processing; Folding shape settling tank takes up an area of little, and equipment such as water pump, valve, rotary drum filter screen are less scaling, system configuration simplification, reasonable; The investment amplitude reduces, and running cost reduces.
(2) the flushing cinder water cycle is used, and accomplishes sewage " zero " discharging, replenishes water purification less, conserve water resource, protection environment.
(3) waste heat energy reclaims generating.
The foregoing description is a preferred implementation of the present invention; But embodiment of the present invention is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. an ironmaking flushing cinder technology is characterized in that, comprising:
Grain slag and polymeric flocculant reaction are obtained bigger grain slag;
Said bigger grain slag is carried out pulp water separate the water that obtains the clean grain slag of filter and leach.
2. ironmaking flushing cinder technology as claimed in claim 1 is characterized in that, also comprises:
The water that leaches after said pulp water the separated flushing cinder that circulates.
3. ironmaking flushing cinder technology as claimed in claim 1 is characterized in that, saidly the reaction of grain slag and polymeric flocculant is obtained bigger grain slag is:
The dosage of said liquid polymeric flocculant is 0.1-3mg/l, comprises negatively charged ion, nonionic, cation polymeric flocculant.
4. ironmaking flushing cinder technology as claimed in claim 1 is characterized in that, saidly said bigger grain slag is carried out pulp water separate to obtain the clean grain slag of filter and comprises with the water that leaches:
Said bigger grain slag is separated the back through grain slag distribution, buffering and pulp water to be obtained the clean grain slag of filter and filters clean water;
The grain slag that said filter is clean is seen off by conveyor.
5. ironmaking flushing cinder technology as claimed in claim 2 is characterized in that, the said water that leaches after said pulp water the is separated flushing cinder that circulates comprises:
The water that leaches after the said pulp water separation is precipitated;
The sedimentary water of said process is obtained flushing cinder water after suction, lifting and heat exchange;
With the said flushing cinder water flushing cinder that circulates;
The waste heat that reclaims during with said heat exchange generates electricity.
6. ironmaking flushing cinder technology as claimed in claim 5 is characterized in that:
When said suction, also, prevent the generation of lime carbonate and other incrustation scales to adding Scale inhibitors through in the sedimentary water.
7. an ironmaking flushing cinder system is characterized in that, comprising:
First device and second device;
Said first device is used for grain slag through obtaining big grain slag with the polymeric flocculant reaction;
Said second device is used for that said big grain slag is carried out pulp water and separates clean grain slag of back acquisition filter and the water that leaches.
8. ironmaking flushing cinder as claimed in claim 7 system is characterized in that, also comprises:
Deflector type settling tank and the 3rd device;
Said deflector type settling tank is used for precipitating through the water that leaches after the pulp water separation said;
Said the 3rd device is used for said water through post precipitation is formed flushing cinder water and delivers to said first device flushing cinder that circulates through handling.
9. ironmaking flushing cinder as claimed in claim 7 system is characterized in that:
Said first device comprises slag pelletizer and water slag groove;
Said second device comprises grain slag divider, dashpot and the strainer of transferring shares;
Said slag pelletizer is used for becoming grain slag to be sent to water slag groove slag water quenching;
Said water slag groove is used for the liquid polymeric flocculant is added after the slag runner place obtains bigger grain slag, more said bigger grain slag is sent to the grain slag divider;
Said grain slag divider is used for that bigger grain slag is carried out grain slag and distributes;
Said dashpot is used for the buffering of the grain slag after distributing is flowed into the strainer of transferring shares;
The said strainer of transferring shares is used for that the grain slag that buffering flows into is carried out pulp water and separates clean grain slag of acquisition filter and the water that leaches.
10. ironmaking flushing cinder as claimed in claim 8 system is characterized in that said the 3rd device comprises:
Water circulating pump suction well, flushing cinder water circulating pump, interchanger and waste-heat recovery device;
Said water circulating pump suction well is used for flowing to the flushing cinder water circulating pump again with behind the water suction water circulating pump suction well through post precipitation;
Said flushing cinder water circulating pump is used for the water that flows into is promoted to interchanger;
After said interchanger is used for the water that promotes carried out heat exchange and obtain flushing cinder water, flow to the slag pelletizer flushing cinder that circulates again;
The waste heat that said waste-heat recovery device reclaims when being used for said heat exchange generates electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104081201A CN102605114A (en) | 2011-12-09 | 2011-12-09 | Slag flushing process and system for ironmaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104081201A CN102605114A (en) | 2011-12-09 | 2011-12-09 | Slag flushing process and system for ironmaking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102605114A true CN102605114A (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104081201A Pending CN102605114A (en) | 2011-12-09 | 2011-12-09 | Slag flushing process and system for ironmaking |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994668A (en) * | 2012-12-06 | 2013-03-27 | 秦皇岛首秦金属材料有限公司 | Utilization method for waste heat of blast furnace slag |
| CN103243187A (en) * | 2013-05-19 | 2013-08-14 | 山西太钢不锈钢股份有限公司 | Method and system for utilizing waste heat of blast furnace slag flushing water |
| JP2015231923A (en) * | 2014-06-09 | 2015-12-24 | 日鉄住金環境株式会社 | Manufacturing method of granulated blast furnace slag and granulated blast furnace slag obtained by the same |
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| JP2000263015A (en) * | 1999-03-17 | 2000-09-26 | Nippon Steel Corp | Method and apparatus for treating waste molten slag |
| CN1769498A (en) * | 2004-11-05 | 2006-05-10 | 马鞍山钢铁股份有限公司 | Blast furnace cinder water quenching processing unit |
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2011
- 2011-12-09 CN CN2011104081201A patent/CN102605114A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000263015A (en) * | 1999-03-17 | 2000-09-26 | Nippon Steel Corp | Method and apparatus for treating waste molten slag |
| CN1769498A (en) * | 2004-11-05 | 2006-05-10 | 马鞍山钢铁股份有限公司 | Blast furnace cinder water quenching processing unit |
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| 《炼铁》 20041031 周昌银等 马钢2号2500m�高炉渣处理工艺优化与创新 9-12 1-10 第23卷, 第5期 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994668A (en) * | 2012-12-06 | 2013-03-27 | 秦皇岛首秦金属材料有限公司 | Utilization method for waste heat of blast furnace slag |
| CN103243187A (en) * | 2013-05-19 | 2013-08-14 | 山西太钢不锈钢股份有限公司 | Method and system for utilizing waste heat of blast furnace slag flushing water |
| JP2015231923A (en) * | 2014-06-09 | 2015-12-24 | 日鉄住金環境株式会社 | Manufacturing method of granulated blast furnace slag and granulated blast furnace slag obtained by the same |
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Application publication date: 20120725 |