CN100445399C - Environment friendly blast furnace slag treating process and system - Google Patents
Environment friendly blast furnace slag treating process and system Download PDFInfo
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- CN100445399C CN100445399C CNB2006101665120A CN200610166512A CN100445399C CN 100445399 C CN100445399 C CN 100445399C CN B2006101665120 A CNB2006101665120 A CN B2006101665120A CN 200610166512 A CN200610166512 A CN 200610166512A CN 100445399 C CN100445399 C CN 100445399C
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- water
- water pipe
- slag
- tank
- granulation
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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
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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
- C21B2400/05—Apparatus features
- C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/072—Tanks to collect the slag, e.g. water tank
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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
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/074—Tower structures for cooling, being confined but not sealed
-
- 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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- Manufacture Of Iron (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Furnace Details (AREA)
Abstract
The present invention is environment friendly blast furnace slag treating process and system. The blast furnace slag treating process includes water quenching the red slag for fast cooling with the granulating tank sprayed cooling water and collecting in the collecting pipeline; conveying to the distributor of dewatering drum and separating into water granulated slag falling to the belt conveyer for being transported to the slag yard and filtered hot water; collecting hot water, pumping to cooling tower for cooling and condensing through the atomizing nozzle in the condensing tower; and collecting the condensated water and returning through the third water pipe, the buffering tank and the fourth water pipe to the granulating tank for reuse. The present invention has the advantages of simple system composition, environment friendship, low power consumption, etc.
Description
Technical field
The invention belongs to the metallurgical iron-making devices field, be specifically related to a kind of blast furnace slag treating process and system thereof.
Background technology
At present; domestic environment friendly blast furnace slag treatment system is mainly by red-slag channel; the granulation case; shot tank (pond); dewatering drum; vapor condensation recovery system (condensing tower); water pump; cooling tower; compositions such as granulation condensation cycle water pipe; contain slag in the red-slag channel; the output terminal of red-slag channel is positioned at the input terminus top of shot tank (pond); be provided with the granulation case between the output terminal of red-slag channel and the input terminus of shot tank; the granulation case is provided with spout hole; when the slag of red-slag channel falls into shot tank; high pressure water in the granulation case sprays through spout hole; slag is become grain slag with high pressure water towards broken shrend; slag-water slurry is further cooling in shot tank, in pipeline enters the divider of dewatering drum.The water of rotary drum bottom makes it to cool off once more.And the water trap that sieve plate is housed rotates and upgrades filtration.When rotary drum forwarded vertex to, grain slag fell on the interior rotary conveyor of rotary drum, is transported to the grain slag stockyard again; Filterable water is collected in the hot water tank; The steam that produces in the slag granulation process enters in the condensing tower on shot tank top, is collected into surge tank after cooling water condensation; Water in water of condensation and the hot water tank pumps into cooling tower through condensation and granulation back water pump respectively and cools off, again by the granulation pump with cooled water is sent into the granulation case with condensation pump and condensing tower recycles.Granulated slag in the hot water tank is sent into water trap by the recycle pump extraction and is refiltered, and prevents that the grain slag powder from depositing in hot water tank.
This technology more complicated (as shown in Figure 1, its system is as shown in Figure 3), this technology is established granulation and 2 circulation loops of condensation, and quantity of circulating water is big, and the energy consumption height takes up an area of greatly, and investment is high.
Summary of the invention
The object of the present invention is to provide a kind of system forms simply, the flushing cinder quality is good, environmental protection effect is good, energy consumption is low, obviously reduce investment outlay and take up an area of environment friendly blast furnace slag treating process and system thereof.
To achieve these goals, technical scheme of the present invention: environment friendly blast furnace slag treating process, it is characterized in that: the granulation case shower cooling water that the red slag that blast furnace produces is installed in below the red-slag channel end cools off shrend fast, enters in the conduit of shot tank bottom; Slag-water slurry in the conduit enters the pulp water pipe and enters the divider of dewatering drum along the pulp water pipe then, the water of dewatering drum bottom makes slag-water slurry continue cooling, and the water trap that sieve plate is housed rotates and upgrades filtration, when dewatering drum forwards high point to, grain slag falls on the interior rotary conveyor of dewatering drum and transports away, is transported to the grain slag stockyard again; The filterable water of dewatering drum is collected in the hot water tank, water in the hot water tank pumps into cooling tower by first water pipe, granulation back water pump and cools off, after the cooling tower cooling, by second water pipe, condensation pump cooled water is sent into atomizing nozzle in the condensing tower again, atomizing nozzle carries out condensation to the steam that produces in the granulating; Water droplet after the vapor condensation is guided to surge tank by the water of condensation collection bucket through the 3rd water pipe, and the water of surge tank recycles through the 4th water pipe to granulation case.
Cooled off slag after the shrend and water fast earlier through sluice by granulation case shower cooling water, pour on the shelves slag plate in the shot tank further fragmentation thereafter after, enter again in the conduit of shot tank bottom.
Described the 4th water pipe is provided with the granulation pump.
A kind of environment friendly blast furnace slag treatment system that realizes above-mentioned technology, it comprises red-slag channel 1, granulation case 2, shot tank 4, pulp water pipe 5, hot water tank 6, first water pipe 7, granulation back water pump 8, condensation pump 9, second water pipe 10, cooling tower 11, rotary conveyor 12, dewatering drum 14, condensing tower 15, the 3rd water pipe 18, surge tank 19, be provided with granulation case 2 below the output terminal portion of red-slag channel 1, the granulation case is provided with spout hole, and shot tank 4 is positioned at condensing tower 15 belows; One end of pulp water pipe 5 is connected with the conduit of shot tank bottom, and the other end of pulp water pipe 5 is connected with the divider 13 of dewatering drum 14; Be provided with rotary conveyor 12 in the dewatering drum, hot water tank 6 is positioned at dewatering drum 14 belows; One end of first water pipe 7 is connected with hot water tank 6, and the other end of first water pipe 7 is connected with the input terminus of cooling tower 11, and first water pipe 7 is provided with granulation back water pump 8; One end of second water pipe 10 is connected with the output terminal of cooling tower 11, and the other end of second water pipe 10 communicates with the water jet standpipe 16 of condensing tower 15, and water jet standpipe 16 is provided with atomizing nozzle, and second water pipe 10 is provided with condensation pump 9; One end of the 3rd water pipe 18 is connected with the water of condensation collection bucket 17 of condensing tower 15, and the other end of the 3rd water pipe 18 is connected with the input terminus of surge tank 19; It is characterized in that: the output terminal of surge tank 19 is connected with an end of the 4th water pipe 21, and the other end of the 4th water pipe 21 is connected with granulation case 2.
The output terminal of described red-slag channel 1 is positioned at the top, input end of sluice 3, and the output terminal portion of sluice 3 is positioned at condensing tower 15 belows and is positioned at the top of shot tank 4.
Be provided with a grade slag plate in the described shot tank 4.
Described the 4th water pipe 21 is provided with granulation pump 20.
The steam that the condensing tower that the present invention adopts sealing produces the granulation cooling of spraying water, this technology does not have steam substantially and enters in the atmosphere with other obnoxious flavoures; The flushing cinder water cycle is used, and production process does not have the sewage discharge, helps environment protection, and environmental protection effect is good.
Compare the major advantage of this blast furnace slag treating process (system) with traditional blast furnace slag treating process (system):
1) in the technical process of the present invention with the water after the condensed steam as flushing cinder granulation water, quantity of circulating water reduces 1/2, therefore needing the refrigerative water yield be 1/2 of traditional technology, the flow of cooling tower reduces greatly, takes up an area of and investment obviously reduces.
2) the pump group of technology of the present invention is few one group, and system is simpler, and energy consumption reduces.
3) turnover of cooling tower all respectively is one group of pump in the technical process of the present invention, and there is not the phase mutual interference in the easy balance of the water yield of total system.
4) the present invention has adopted sluice and shelves slag plate, the grain slag better quality, and help improving dehydrating effect.
The invention has the beneficial effects as follows: system form simple, the flushing cinder quality is good, environmental protection effect is good, energy consumption is low, obviously reduce investment outlay and the easy balance of the water yield of occupation of land, total system.
Description of drawings
Fig. 1 is the process flow sheet of existing blast-furnace slag processing system
Fig. 2 is a process flow sheet of the present invention
Fig. 3 is the structural representation of existing blast-furnace slag processing system
Fig. 4 is a structural representation of the present invention
Among the figure: 1-red-slag channel, 2-granulation case, 3-sluice, 4-shot tank; 5-pulp water pipe, 6-hot water tank, 7-first water pipe, 8-granulation back water pump; the 9-condensation pump, 10-second water pipe, 11-cooling tower, 12-rotary conveyor; the 13-divider, 14-dewatering drum, 15-condensing tower; the 16-water jet standpipe, 17-water of condensation collection bucket, 18-the 3rd water pipe; the 19-surge tank, 20-granulation pump, 21-the 4th water pipe.
Embodiment
As shown in Figure 2, environment friendly blast furnace slag treating process, the granulation case shower cooling water that the red slag that blast furnace produces is installed in below the red-slag channel end cools off shrend fast, slag after the shrend and water are earlier through sluice, thereafter after pouring on the shelves slag plate in the shot tank further fragmentation, enter in the conduit of shot tank bottom; Slag-water slurry in the conduit enters the pulp water pipe and enters the divider of dewatering drum along the pulp water pipe then, the water of dewatering drum bottom makes slag-water slurry continue cooling, and the water trap that sieve plate is housed rotates and upgrades filtration, when dewatering drum forwards high point to, grain slag falls on the interior rotary conveyor of dewatering drum and transports away, is transported to the grain slag stockyard again; The filterable water of dewatering drum is collected in the hot water tank, water in the hot water tank pumps into cooling tower by first water pipe, granulation back water pump and cools off, after the cooling tower cooling, by second water pipe, condensation pump cooled water is sent into atomizing nozzle in the condensing tower again, atomizing nozzle carries out condensation to the steam that produces in the granulating; Water droplet after the vapor condensation is guided to surge tank by the water of condensation collection bucket through the 3rd water pipe, and the water of surge tank is beaten to the granulation case through the 4th water pipe, granulation pump and recycled.
As shown in Figure 4, a kind of environment friendly blast furnace slag treatment system that realizes aforesaid method, it comprises red-slag channel 1, granulation case 2, sluice 3, shot tank 4, pulp water pipe 5, hot water tank 6, first water pipe 7, granulation back water pump 8, condensation pump 9, second water pipe 10, cooling tower 11, rotary conveyor 12, dewatering drum 14, condensing tower 15, the 3rd water pipe 18, surge tank 19, granulation pump 20, the 4th water pipe 21, the output terminal of red-slag channel 1 is positioned at the top, input end of sluice 3, be provided with granulation case 2 below the output terminal portion of red-slag channel 1, the granulation case is provided with spout hole, the output terminal portion of sluice 3 is positioned at condensing tower 15 belows and is positioned at the top of shot tank 4, shot tank 4 is positioned at condensing tower 15 belows, is provided with a grade slag plate in the shot tank 4; One end of pulp water pipe 5 is connected with the conduit of shot tank bottom, and the other end of pulp water pipe 5 is connected with the divider 13 of dewatering drum 14; Be provided with rotary conveyor 12 in the dewatering drum, hot water tank 6 is positioned at dewatering drum 14 belows; One end of first water pipe 7 is connected with hot water tank 6, and the other end of first water pipe 7 is connected with the input terminus of cooling tower 11, and first water pipe 7 is provided with granulation back water pump 8; One end of second water pipe 10 is connected with the output terminal of cooling tower 11, and the other end of second water pipe 10 communicates with the water jet standpipe 16 of condensing tower 15, and water jet standpipe 16 is provided with atomizing nozzle, and second water pipe 10 is provided with condensation pump 9; One end of the 3rd water pipe 18 is connected with the water of condensation collection bucket 17 of condensing tower 15, and the other end of the 3rd water pipe 18 is connected with the input terminus of surge tank 19; The output terminal of surge tank 19 is connected with an end of the 4th water pipe 21, and the other end of the 4th water pipe 21 is connected with granulation case 2, and the 4th water pipe 21 is provided with granulation pump 20.
2 water circulating pumps are equipped with in the bottom of hot water tank, and water circulating pump links to each other with recirculation pipe, and the output terminal of circulating pipe is positioned at shot tank.Granulated slag in the hot water tank is sent into shot tank by the recycle pump extraction and is refiltered through rotary drum, prevents that the grain slag powder from depositing in cooling tower.
Main technique equipment:
1) sluice:
Adopt steel construction groove and support.The groove top is provided with seal bootr, prevents that steam is excessive.Sluice is about 7m, in establish the carborundum liner plate of anti-erosive wear.
2) granulation case:
The granulation case is made up of the orifice plate that is covered with porous reducing shower nozzle, housing, conduit coupling.The scope of perforate on the orifice plate, the branch Bouyei slag trajectory mark in the size of eyelet, angle and hole presents non-homogeneous state with the different of slag flow section.
3) shot tank:
Be positioned at the condensing tower below, diameter is about the cylinder of 6m.In establish strike plate, grid and grain slag pipeline.Slag-water slurry is in this further fragmentation and in pipeline flows into the rotary drum divider.
4) condensing tower:
Be positioned at the shot tank top, diameter is about the cylinder of 6m, and total height is about 30m.Comprise that water of condensation collection bucket, 2 groups of water jet standpipes and top diffuse valve.
5) divider:
Divider is one section tapered rectangular pipe.The below of pipe has the hole that section does not wait.In order to keep the shape of perforate section, be embedded with the ceramic wear-resisting liner plate.Pulp water stream is evenly distributed in slag-water slurry in the whole dewatering drum, thereby reaches dehydrating effect preferably by these bottom perforate, also can make the screen cloth wearing and tearing simultaneously evenly, the activity ratio height.
6) dewatering drum:
Dewatering drum is made up of the blade bucket of the band filter screen of metal frame, double-layer filtering net cylindrical shell and drum internal perisporium.
7) rotary conveyor:
Conveyor passes rotary drum.Slag sand after the rotary drum dehydration falls into conveyor, and then is transported to cinder yard through many conveyors, is transported to the user by train or automobile.
8) hot water tank:
Hot water tank is located at the below of dewatering drum, collects the hot water that leaches from dewatering drum.Hot water tank is made by concrete, is divided into 3 lattice, and preceding 2 lattice separate with steel plate, and volume is about 100m
3, 2 water circulating pumps are equipped with in the bottom, and water circulating pump pumps into shot tank once more with the water of hot water tank and filters once more through rotary drum, with the quality of the water that guarantees to flow back to cooling tower.Last 1 lattice volume is about 100m
3, the granulation back water pump is established in the bottom.
9) surge tank:
The water that collection is reclaimed from condensing tower.Surge tank is about 40m
3
Claims (7)
1. environment friendly blast furnace slag treating process is characterized in that: the red slag that blast furnace produces is cooled off shrend fast by granulation case shower cooling water, enters in the conduit of shot tank bottom; The granulation case is installed in below the red-slag channel end; Slag-water slurry in the conduit enters the pulp water pipe and enters the divider of dewatering drum along the pulp water pipe then, the water of dewatering drum bottom makes slag-water slurry continue cooling, and the water trap that sieve plate is housed rotates and upgrades filtration, when dewatering drum forwarded high point to, grain slag fell on the interior rotary conveyor of dewatering drum and transports away; The filterable water of dewatering drum is collected in the hot water tank, water in the hot water tank pumps into cooling tower by first water pipe, granulation back water pump and cools off, after the cooling tower cooling, by second water pipe, condensation pump cooled water is sent into atomizing nozzle in the condensing tower again, atomizing nozzle carries out condensation to the steam that produces in the granulating; Water droplet after the vapor condensation is guided to surge tank by the water of condensation collection bucket through the 3rd water pipe, and the water of surge tank recycles through the 4th water pipe to granulation case.
2. environment friendly blast furnace slag treating process according to claim 1; it is characterized in that: cooled off slag after the shrend and water fast earlier through sluice by granulation case shower cooling water; thereafter after pouring on the shelves slag plate in the shot tank further fragmentation, enter again in the conduit of shot tank bottom.
3. environment friendly blast furnace slag treating process according to claim 1 is characterized in that: described the 4th water pipe is provided with the granulation pump.
4. environment friendly blast furnace slag treatment system that realizes the described technology of claim 1, it comprises red-slag channel (1), granulation case (2), shot tank (4), pulp water pipe (5), hot water tank (6), first water pipe (7), granulation back water pump (8), condensation pump (9), second water pipe (10), cooling tower (11), rotary conveyor (12), dewatering drum (14), condensing tower (15), the 3rd water pipe (18), surge tank (19), be provided with granulation case (2) below the output terminal portion of red-slag channel (1), the granulation case is provided with spout hole, and shot tank (4) is positioned at condensing tower (15) below; One end of pulp water pipe (5) is connected with the conduit of shot tank bottom, and the other end of pulp water pipe (5) is connected with the divider (13) of dewatering drum (14); Be provided with rotary conveyor (12) in the dewatering drum, hot water tank (6) is positioned at dewatering drum (14) below; One end of first water pipe (7) is connected with hot water tank (6), and the other end of first water pipe (7) is connected with the input terminus of cooling tower (11), and first water pipe (7) is provided with granulation back water pump (8); One end of second water pipe (10) is connected with the output terminal of cooling tower (11), and the other end of second water pipe (10) communicates with the water jet standpipe (16) of condensing tower (15), and water jet standpipe (16) is provided with atomizing nozzle, and second water pipe (10) is provided with condensation pump (9); One end of the 3rd water pipe (18) is connected with the water of condensation collection bucket (17) of condensing tower (15), and the other end of the 3rd water pipe (18) is connected with the input terminus of surge tank (19); It is characterized in that: the output terminal of surge tank (19) is connected with an end of the 4th water pipe (21), and the other end of the 4th water pipe (21) is connected with granulation case (2).
5. environment friendly blast furnace slag treatment system according to claim 4; it is characterized in that: the output terminal of described red-slag channel (1) is positioned at the top, input end of sluice (3), and the output terminal portion of sluice (3) is positioned at condensing tower (15) below and is positioned at the top of shot tank (4).
6. environment friendly blast furnace slag treatment system according to claim 4 is characterized in that: described shot tank is provided with a grade slag plate in (4).
7. environment friendly blast furnace slag treatment system according to claim 4 is characterized in that: described the 4th water pipe (21) is provided with granulation pump (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101665120A CN100445399C (en) | 2006-12-28 | 2006-12-28 | Environment friendly blast furnace slag treating process and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101665120A CN100445399C (en) | 2006-12-28 | 2006-12-28 | Environment friendly blast furnace slag treating process and system |
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| CN1986836A CN1986836A (en) | 2007-06-27 |
| CN100445399C true CN100445399C (en) | 2008-12-24 |
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| CNB2006101665120A Expired - Fee Related CN100445399C (en) | 2006-12-28 | 2006-12-28 | Environment friendly blast furnace slag treating process and system |
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| CN102147122B (en) * | 2010-02-05 | 2014-03-05 | 鞍钢集团工程技术有限公司 | Method for heating by utilizing slag quenching water of blast furnace |
| CN102230037B (en) * | 2011-06-13 | 2014-11-12 | 武汉钢铁(集团)公司 | Method for controlling sand content of water body of blast furnace INBA circulating system and flow-limiting device thereof |
| CN102269529B (en) * | 2011-07-20 | 2013-05-08 | 北京中冶设备研究设计总院有限公司 | Closed loop control method and device for high-temperature slag flow and cooling water amount |
| CN102557318A (en) * | 2012-01-13 | 2012-07-11 | 安徽工业大学 | Method and system for preparing soft water and utilizing afterheat by using spent steam obtained through ironmaking blast furnace slag washing |
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| CN102660670B (en) * | 2012-04-27 | 2014-08-13 | 中冶南方(武汉)威仕工业炉有限公司 | Cooling water circulating and recycling system for normalizing furnace |
| CN102876821B (en) * | 2012-09-03 | 2014-03-12 | 中冶南方工程技术有限公司 | Water supply method for blast-furnace slag water treatment and water supply systems |
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| CN103525958B (en) * | 2013-10-30 | 2016-06-15 | 江苏沙钢集团有限公司 | A kind of without granulation pump-type high temperature furnace slag water quenching technology and system |
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| CN111686904A (en) * | 2020-07-13 | 2020-09-22 | 云南锡业股份有限公司锡业分公司 | Lean tin slag treatment system and treatment method without wastewater discharge |
| CN112375858A (en) * | 2020-10-21 | 2021-02-19 | 中冶南方工程技术有限公司 | Environment-friendly blast furnace slag treatment steam recovery system and method |
| CN112430692A (en) * | 2020-10-21 | 2021-03-02 | 中冶南方工程技术有限公司 | Blast furnace quenching slag steam waste heat utilization and white spot eliminating system and method |
| CN112474706A (en) * | 2020-10-28 | 2021-03-12 | 马钢集团设计研究院有限责任公司 | Slag treatment system and method for molten state ash slag |
| CN114908200A (en) * | 2022-05-24 | 2022-08-16 | 广东韶钢松山股份有限公司 | Blast furnace water quenching slag steam treatment device and slag steam treatment process |
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| US4127399A (en) * | 1975-07-25 | 1978-11-28 | Rasa Shoji K.K. | Method of making granulated slag |
| WO2006108517A1 (en) * | 2005-04-11 | 2006-10-19 | Siemens Vai Metals Technologies Ltd. | Method and installation for slag granulation |
| CN2846424Y (en) * | 2005-08-12 | 2006-12-13 | 中冶南方工程技术有限公司 | Environment protection type slag treating device by wheel method |
| CN200996021Y (en) * | 2006-12-28 | 2007-12-26 | 中冶南方工程技术有限公司 | Environmental-protecting blast-furnace cinder treating system |
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2006
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4127399A (en) * | 1975-07-25 | 1978-11-28 | Rasa Shoji K.K. | Method of making granulated slag |
| WO2006108517A1 (en) * | 2005-04-11 | 2006-10-19 | Siemens Vai Metals Technologies Ltd. | Method and installation for slag granulation |
| CN2846424Y (en) * | 2005-08-12 | 2006-12-13 | 中冶南方工程技术有限公司 | Environment protection type slag treating device by wheel method |
| CN200996021Y (en) * | 2006-12-28 | 2007-12-26 | 中冶南方工程技术有限公司 | Environmental-protecting blast-furnace cinder treating system |
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| Publication number | Publication date |
|---|---|
| CN1986836A (en) | 2007-06-27 |
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