CN2748467Y

CN2748467Y - Water-quenching slag-washing water treatment device for blast furnace slag

Info

Publication number: CN2748467Y
Application number: CNU2004200808231U
Authority: CN
Inventors: 周昌银; 李明
Original assignee: Maanshan Iron and Steel Co Ltd
Current assignee: Maanshan Iron and Steel Co Ltd
Priority date: 2004-11-05
Filing date: 2004-11-05
Publication date: 2005-12-28
Anticipated expiration: 2014-11-05

Abstract

The utility model belongs to the molten slag process, in particular to a water supply device for blast furnace slag process, which is a slag flushing water circulation circuit connected respectively by a punching box, a water slag gutter, a water slag slot, a communicating pipe, a dispenser buffer slot and a revolving drum filter. The auxiliary devices are cancelled such as cooling tower, air cooling device, etc. A settling tank and an impounding tank are provided beneath the revolving drum filter; the two tanks are connected by overflow holes arranged on the tank walls; a slag removing means is provided above the settling tank, and the impounding tank is directly connected with a nodulizer by pipelines, a valve and a slag flushing pump to comprise a water supply device combining the slag flushing, the recovery processing and the cyclic utilization into integration. Compared with the prior art, the auxiliary devices are cancelled such as cooling tower, air cooling device, etc. The configuration of the equipment and the facility is simplified and reasonable; the investment and the operation cost are low; the slag flushing water obtains the purifying, the equipment attrition is reduced, the pipeline blocking is avoided, and the inspection quantity is reduced; the equipment failure rate is low, and the punching rate of the water slag is high, which is in convenient for the smooth running and the stable production of the blast furnace; the slag flushing water and the furnace sewage are cyclically used to obtain the 'zero discharging of the sewage to save the water resource.

Description

Blast furnace cinder water quenching flushing cinder water treatment device

Technical field

Blast furnace cinder water quenching flushing cinder water treatment device belongs to and melts the slag processing, relates in particular to blast furnace slag and handles water supply installation.

Background technology

The blast furnace ironmaking stokehold is big with the water spot volume, and quantity of wastewater effluent is also big, and particularly blast furnace cinder water quenching processing consumption water is more, as not recycling, has wasted water resources, has polluted environment, even has influenced blast furnace production.INBA method Water Quenching water supply installation comprises grain slag Punched box, water slag groove, grain slag groove, communicating pipe, divider dashpot, drum filter, the funnel that catchments, hot tub, cooling tower and auxiliary facility, slag flushing pump such as air-cooled in the prior art, is in turn connected into the logical circuit of flushing cinder current.Flushing cinder muddy water under the drum filter filter flows into hot tub through the funnel that catchments, and delivers to cooling tower by cooling pump, to below 60 ℃, delivers to pelletizer by the slag flushing pump pressurization through air-cooled, uses for flushing cinder.This treatment unit is only handled water temperature, spends huge sums to set up cooling tower and auxiliary facility such as air-cooled.Research and practice show uses 90 ℃ of water temperatures and the water temperature of using below 60 ℃, the high-temperature slag that shrend is 1500 ℃, and its granulation effect is basic identical.This device is not but taked effective treatment measures to particulate grain slag contained in the flushing cinder muddy water, thereby has open defect, and equipment and facilities Allocation are unreasonable, numerous and jumbled, investment is big, and the working cost height does not have useful effect; Equipment and pipeline, valve serious wear, maintenance workload is big, and scarfing cinder labour intensity is big, consumes material, spare part expense height; The equipment failure rate height, grain slag system rate is low, and waste grain slag resource influences blast furnace production.

Summary of the invention

Have the irrational theory of flushing cinder water treatment and the defective of existence in order to overcome prior art, the purpose of this utility model is to provide a kind of equipment and facilities Allocation reasonable, reduced investment, and working cost is low; Particulate grain slag in the flushing cinder muddy water is few, and equipment failure rate is low; Blowing rate of slag height, granulation are effective, the water supply installation that the flushing cinder water cycle is used.

Blast furnace cinder water quenching flushing cinder water treatment device, water slag groove connects pelletizer and grain slag groove, grain slag groove bottom connects pipe, the divider dashpot that is connected with communicating pipe stretches in the drum filter, constitute the logical circuit of flushing cinder current, be characterized in cancelling cooling tower that water temperature handles and auxiliary facility such as air-cooled; Settling tank, water reservoir are set below drum filter; two ponds are communicated with by the overflow weir that is located on the pool wall, and slag removing mechanism is set on the settling tank, and water reservoir is by pipe connection valve, slag flushing pump; directly be connected, constitute the water supply installation of a collection flushing cinder, recycling, recycle with pelletizer.

During the punching out grain slag; blast furnace slag is by the slag ditch pelletizer of flowing through; pelletizer ejection constant voltage high speed water jet impact slag; slag water quenching is granulated into grain slag; slag and water enter the further broken granulation of grain slag groove along water slag groove; flow into drum filter by communicating pipe and divider dashpot and dewater, constitute the circulation circuit of flushing cinder flush slag.Then; having particulate grain slag muddy water filters in the settling tank; the sewage of stokehold also imports in the settling tank; the particulate grain slag and the foreign material that are deposited at the bottom of the pond are removed by slag removing mechanism; " purifying waste water " of post precipitation; flow into water reservoir by overflow weir, directly deliver to pelletizer by the slag flushing pump pressurization again, use for flushing cinder.

Compared with prior art, the utility model advantage is:

1, cancellation cooling tower and auxiliary facility such as air-cooled, appliance arrangement and facilities Allocation simplify, rationally, investment reduces significantly, working cost is low;

2, flushing cinder water is purified, and has alleviated equipment attrition, avoids line clogging, and service life of equipment prolongs, and the maintenance amount reduces, and saves lot of materials and labour cost, and scarfing cinder is convenient, reduces labor intensity;

3, breakdown rate is low, and blowing rate of slag reaches more than 99%, helps smooth operation of furnace, stable yields;

4, the flushing cinder water cycle is used, and has recycled stokehold sewage again, accomplishes sewage " zero " discharging, replenishes industrial water purification less, has protected environment, has saved water resources.

Description of drawings

In conjunction with the accompanying drawings the utility model is described in further detail.

1, Fig. 1 is a blast furnace cinder water quenching flushing cinder water treatment device connection diagram.

2, Fig. 2 is a blast furnace cinder water quenching flushing cinder water treatment device floor map.

3, Fig. 3 is a blast furnace cinder water quenching flushing cinder water treatment device slag removing mechanism connection diagram.

Embodiment

From accompanying drawing as can be seen the utility model embodiment connect to form successively by conveyor 7, transhipment conveyor 8, grab-crane 9, chute funnel 10, settling tank 11, water reservoir 12, electric liquid gate valve 13, slag flushing pump 14, relief valve 15, dried pit watering valve 16, flushing cinder gate valve 17, industrial water purifying valve 18, waterways, stokehold 19, dried pit backwater ditch 20 in pelletizer 1, water slag groove 2, grain slag groove 3, communicating pipe 4, divider dashpot 5, drum filter 6, the tube.Pelletizer is provided with water slag groove 21 time, connects pelletizer 1 and grain slag groove 3, and grain slag groove bottom connects pipe 4, and the divider dashpot 5 that is connected with communicating pipe 4 stretches in the drum filter 6, and conveyor 7 is connected mutually with transhipment conveyor 8 in the tube, is connected to finished bin; Drum filter is provided with settling tank 11 for 6 times, water reservoir 12 is communicated with by the overflow weir that is located on the pool wall; Settling tank 11 tops are provided with grab-crane 9, and are located at a chute funnel 10 of interior conveyor 7 tops and are connected mutually; Water reservoir 12 directly is connected with pelletizer 1 by pipe connection electricity liquid gate valve 13, slag flushing pump 14, flushing cinder gate valve 17, constitutes the water supply installation of a collection flushing cinder, recycling, recycle.

As seen from the figure, slag removing mechanism is made up of settling tank 11 and the grab-crane 9 established thereon, settling tank 11 is positioned at drum filter 6 belows and partly is arranged to slope, half inclined-plane, and the top is provided with grab-crane 9, is connected mutually with the chute funnel 10 of 7 tops of conveyor in the tube.After the flushing cinder muddy water fell, the particulate grain slag precipitated at the bottom of flowing into the pond along the slope, and grab-crane 9 cleaning in time is deposited in the particulate grain slag at the bottom of the pond, pour chute funnel 10 into, transported by conveyor in the tube 7, transhipment conveyor 8, production practice show that 2500 cubic metres of blast furnaces can clean out 40 tons of grain slags every day.Eliminate the particulate grain slag and piled up at the bottom of the pond, purified flushing cinder water, alleviated the wearing and tearing of pipeline, valve and equipment greatly." purifying waste water " of precipitating, overflow are to water reservoir 12, and " purifying waste water " that water reservoir is 12 li directly supplies with the flushing cinder water.Slag flushing pump 14 is loaded in the pump hole 21, and slag flushing pump 14 both sides are provided with electric liquid gate valve 13, low-tension side and water reservoir 12 pipe connection, and the flushing cinder water is supplied with, about about 90 ℃ of water temperature by flushing cinder gate valve 17 direct and pelletizer 1 pipe connection in the high-tension side.Slag flushing pump 14 high-tension sides also with relief valve 15, dried pit watering valve 16 pipe connection, in order to reduce the pressure and the flow of flushing cinder water, supply with dried slag watering water.Relief valve 15 side in addition is communicated with water reservoir 12.It is standby as accident water and additional water that other establishes industrial water purifying valve 18.Changed flushing cinder water treatment thinking, scarfing cinder is handled emphatically, has simplified flushing cinder water treating equipment and facility, reduces investment and working cost significantly, has lowered equipment failure rate.

As seen from Figure 3, the pond face absolute altitude of settling tank 11, water reservoir 12 is lower than the absolute altitude and the dried pit absolute altitude of stokehold terrace, waterways, stokehold 19, dried pit backwater ditch 20 all are connected with settling tank 11, furnace roof washing water, dried slag watering backwater, terrace wash-down water all import in the settling tank 11, recycled, accomplish sewage " zero " discharging, flushing cinder water replenishes less.Save water resources, protected environment.

The utility model adopts the spout hole quantity of regulating relief valve 15 and pelletizer 1, regulates the pressure and the flow of flushing cinder water, with the granularity and the quality of control grain slag finished product.

Claims

1; blast furnace cinder water quenching flushing cinder water treatment device; water slag groove (2) connects pelletizer (1) and grain slag groove (3); grain slag groove bottom connects pipe (4); the divider dashpot (5) that is connected with communicating pipe (4) stretches in the drum filter (6); constitute the logical circuit of flushing cinder current; it is characterized in that settling tank (11) being set in drum filter (6) below; water reservoir (12); two ponds are communicated with by the overflow weir that is located on the pool wall; settling tank is provided with slag removing mechanism on (11), and water reservoir (12) is by connecting tube; valve; slag flushing pump (14) directly and pelletizer (1) connect and compose the collection flushing cinder; recycling; the water supply installation of recycle.

2, blast furnace cinder water quenching flushing cinder water treatment device according to claim 1, it is characterized in that settling tank (11) is positioned at drum filter (6) below part and is arranged to slope, half inclined-plane shape, settling tank (11) top is provided with band grab-crane (9), with the corresponding linking of chute funnel (10) of conveyor in the tube (7) top.

3, blast furnace cinder water quenching flushing cinder water treatment device according to claim 1; it is characterized in that slag flushing pump (14) both sides are provided with electric liquid gate valve (13); low-tension side and water reservoir (12) pipe connection; the high-tension side is direct and pelletizer (1) pipe connection by flushing cinder gate valve (17); the high-tension side also with dried pit watering valve (16), relief valve (15) pipe connection, relief valve (15) is side and water reservoir (12) pipe connection in addition.

4, blast furnace cinder water quenching flushing cinder water treatment device according to claim 1, the ground elevation that it is characterized in that settling tank (11), water reservoir (12) is lower than stokehold terrace absolute altitude, dried pit absolute altitude, blast furnace furnace roof washing pipe, dried pit return water pipe, waterways, stokehold are connected with settling tank (11).